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Before installing the unit, thoroughly read the following safety precautions.
Observe these safety precautions for your safety.
WARNING
This symbol is intended to alert the user to the presence of important instructions that must be followed to avoid
the risk of serious injury or death.
CAUTION
This symbol is intended to alert the user to the presence of important instructions that must be followed to avoid
the risk of serious injury or damage to the unit.
After reading this manual, give it to the user to retain for future reference.
Keep this manual for easy reference. When the unit is moved or repaired, give this manual to those who provide these
services.
When the user changes, make sure that the new user receives this manual.
WARNING
Ask your dealer or a qualified technician to install the In the event of a refrigerant leak, thoroughly ventilate
unit. the room.
Improper installation by the user may result in water leak- If refrigerant gas leaks and comes in contact with an open
age, electric shock, smoke, and/or fire. flame, poisonous gases will be produced.
Properly install the unit on a surface that can with- When installing the All-Fresh type units, take it into
stand the weight of the unit. consideration that the outside air may be discharged
directly into the room when the thermo is turned off.
Unit installed on an unstable surface may fall and cause in-
jury. Direct exposure to outdoor air may have an adverse effect
on health. It may also result in food spoilage.
Only use specified cables. Securely connect each ca-
ble so that the terminals do not carry the weight of the Properly install the unit according to the instructions
cable. in the installation manual.
Improperly connected or fixed cables may produce heat Improper installation may result in water leakage, electric
and start a fire. shock, smoke, and/or fire.
Take appropriate safety measures against strong Have all electrical work performed by an authorized
winds and earthquakes to prevent the unit from falling. electrician according to the local regulations and in-
structions in this manual, and a dedicated circuit must
If the unit is not installed properly, the unit may fall and
be used.
cause serious injury to the person or damage to the unit.
Insufficient capacity of the power supply circuit or improper
Do not make any modifications or alterations to the installation may result in malfunctions of the unit, electric
unit. Consult your dealer for repair. shock, smoke, and/or fire.
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WARNING
Securely attach the terminal block cover (panel) to the After completing the service work, check for a gas
unit. leak.
If the terminal block cover (panel) is not installed properly, If leaked refrigerant is exposed to a heat source, such as a
dust and/or water may infiltrate and pose a risk of electric fan heater, stove, or electric grill, poisonous gases may be
shock, smoke, and/or fire. produced.
Only use the type of refrigerant that is indicated on the Do not try to defeat the safety features of the unit.
unit when installing or reinstalling the unit.
Forced operation of the pressure switch or the temperature
Infiltration of any other type of refrigerant or air into the unit switch by defeating the safety features of these devices, or
may adversely affect the refrigerant cycle and may cause the use of accessories other than the ones that are recom-
the pipes to burst or explode. mended by MITSUBISHI may result in smoke, fire, and/or
explosion.
When installing the unit in a small room, exercise cau-
tion and take measures against leaked refrigerant Only use accessories recommended by MITSUBISHI.
reaching the limiting concentration.
Ask a qualified technician to install the unit. Improper instal-
Consult your dealer with any questions regarding limiting lation by the user may result in water leakage, electric
concentrations and for precautionary measures before in- shock, smoke, and/or fire.
stalling the unit. Leaked refrigerant gas exceeding the lim-
iting concentration causes oxygen deficiency.
HWE0609A
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Precautions for handling units for use with R410A
CAUTION
Do not use the existing refrigerant piping. Use a vacuum pump with a reverse-flow check valve.
A large amount of chlorine that may be contained in the re- If a vacuum pump that is not equipped with a reverse-flow
sidual refrigerant and refrigerating machine oil in the exist- check valve is used, the vacuum pump oil may flow into the
ing piping may cause the refrigerating machine oil in the refrigerant cycle and cause the refrigerating machine oil to
new unit to deteriorate. deteriorate.
R410A is a high-pressure refrigerant and can cause the
existing pipes to burst. Prepare tools for exclusive use with R410A. Do not use
the following tools if they have been used with the con-
Use refrigerant pipes made of phosphorus deoxidized ventional refrigerant (gauge manifold, charging hose,
copper. Keep the inner and outer surfaces of the pipes gas leak detector, reverse-flow check valve, refrigerant
clean and free of such contaminants as sulfur, oxides, charge base, vacuum gauge, and refrigerant recovery
dust, dirt, shaving particles, oil, and water. equipment.).
These types of contaminants inside the refrigerant pipes If the refrigerant or the refrigerating machine oil left on
may cause the refrigerant oil to deteriorate. these tools are mixed in with R410A, it may cause the re-
frigerating machine oil to deteriorate.
Store the pipes to be installed indoors, and keep both Infiltration of water may cause the refrigerating machine
ends of the pipes sealed until immediately before braz- oil to deteriorate.
ing. (Keep elbows and other joints wrapped in plastic.) Gas leak detectors for conventional refrigerants will not
detect an R410A leak because R410A is free of chlorine.
Infiltration of dust, dirt, or water into the refrigerant system
may cause the refrigerating machine oil to deteriorate or
Do not use a charging cylinder.
cause the unit to malfunction.
If a charging cylinder is used, the composition of the refrig-
Use a small amount of ester oil, ether oil, or alkylben- erant will change, and the unit may experience power loss.
zene to coat flares and flanges.
Exercise special care when handling the tools for use
Infiltration of a large amount of mineral oil may cause the re-
with R410A.
frigerating machine oil to deteriorate.
Infiltration of dust, dirt, or water into the refrigerant system
Charge liquid refrigerant (as opposed to gaseous re- may cause the refrigerating machine oil to deteriorate.
frigerant) into the system.
Only use refrigerant R410A.
If gaseous refrigerant is charged into the system, the com-
position of the refrigerant in the cylinder will change and The use of other types of refrigerant that contain chlorine
may result in performance loss. (i.e. R22) may cause the refrigerating machine oil to deteri-
orate.
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Before installing the unit
WARNING
Do not install the unit where a gas leak may occur. When installing the unit in a hospital, take appropriate
measures to reduce noise interference.
If gaseous refrigerant leaks and piles up around the unit, it
may be ignited. High-frequency medical equipment may interfere with the
normal operation of the air conditioner or vice versa.
Do not use the unit to keep food items, animals, plants,
artifacts, or for other special purposes. Do not install the unit on or over things that cannot get
wet.
The unit is not designed to preserve food products.
When the humidity level exceeds 80% or if the drainage
Do not use the unit in an unusual environment. system is clogged, the indoor unit may drip water. Drain wa-
ter is also discharged from the outdoor unit. Install a central-
Do not install the unit where a large amount of oil or steam ized drainage system if necessary.
is present or where acidic or alkaline solutions or chemical
sprays are used frequently. Doing so may lead to a re-
markable drop in performance, electric shock, malfunc-
tions, smoke, and/or fire.
The presence of organic solvents or corrosive gas (i.e.
ammonia, sulfur compounds, and acid) may cause gas
leakage or water leakage.
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Before installing the unit (moving and reinstalling the unit) and performing
electrical work
CAUTION
Properly ground the unit. Periodically check the installation base for damage.
Do not connect the grounding wire to a gas pipe, water pipe, If the unit is left on a damaged platform, it may fall and
lightning rod, or grounding wire from a telephone pole. Im- cause injury.
proper grounding may result in electric shock, smoke, fire,
and/or malfunction due to noise interference. Properly install the drain pipes according to the in-
structions in the installation manual. Keep them insu-
Do not put tension on the power supply wires. lated to avoid dew condensation.
If tension is put on the wires, they may break and result in Improper plumbing work may result in water leakage and
excessive heat, smoke, and/or fire. damage to the furnishings.
Install an earth leakage breaker to avoid the risk of Exercise caution when transporting products.
electric shock.
Products weighing more than 20 kg should not be carried
Failure to install an earth leakage breaker may result in alone.
electric shock, smoke, and/or fire. Do not carry the product by the PP bands that are used on
some products.
Use the kind of power supply wires that are specified Do not touch the heat exchanger fins. They are sharp and
in the installation manual. dangerous.
When lifting the unit with a crane, secure all four corners
The use of wrong kind of power supply wires may result in to prevent the unit from falling.
current leak, electric shock, and/or fire.
Properly dispose of the packing materials.
Use breakers and fuses (current breaker, remote
switch <switch + Type-B fuse>, moulded case circuit Nails and wood pieces in the package may pose a risk of
breaker) with the proper current capacity. injury.
Plastic bags may pose a risk of choking hazard to chil-
The use of wrong capacity fuses, steel wires, or copper dren. Tear plastic bags into pieces before disposing of
wires may result in malfunctions, smoke, and/or fire. them.
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Before the test run
CAUTION
Turn on the unit at least 12 hours before the test run. Do not operate the unit without panels and safety
guards.
Keep the unit turned on throughout the season. If the unit is
turned off in the middle of a season, it may result in malfunc- Rotating, high-temperature, or high-voltage parts on the unit
tions. pose a risk of burns and/or electric shock.
To avoid the risk of electric shock or malfunction of the Do not turn off the power immediately after stopping
unit, do not operate switches with wet hands. the operation.
Keep the unit on for at least five minutes before turning off
Do not touch the refrigerant pipes with bare hands dur-
the power to prevent water leakage or malfunction.
ing and immediately after operation.
During or immediately after operation, certain parts of the Do not operate the unit without the air filter.
unit such as pipes and compressor may be either very cold
Dust particles may build up in the system and cause mal-
or hot, depending on the state of the refrigerant in the unit
functions.
at the time. To reduce the risk of frost bites and burns, do
not touch these parts with bare hands.
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CONTENTS
I Read Before Servicing
[1] Read Before Servicing.............................................................................................................. 3
[2] Necessary Tools and Materials ................................................................................................ 4
[3] Piping Materials ........................................................................................................................ 5
[4] Storage of Piping ...................................................................................................................... 7
[5] Pipe Processing........................................................................................................................ 7
[6] Brazing...................................................................................................................................... 8
[7] Air Tightness Test..................................................................................................................... 9
[8] Vacuum Drying (Evacuation) .................................................................................................. 10
[9] Refrigerant Charging .............................................................................................................. 11
[10] Remedies to be taken in case of a Refrigerant Leak............................................................ 11
[11] Characteristics of the Conventional and the New Refrigerants ............................................ 12
[12] Notes on Refrigerating Machine Oil...................................................................................... 13
II Restrictions
[1] System configuration .............................................................................................................. 17
[2] Types and Maximum allowable Length of Cables .................................................................. 18
[3] Switch Settings and Address Settings .................................................................................... 19
[4] Sample System Connection ................................................................................................... 25
[5] An Example of a System to which an MA Remote Controller is connected ........................... 26
[6] An Example of a System to which an M-NET Remote Controller is connected ..................... 36
[7] An Example of a System to which both MA Remote Controller and
M-NET Remote Controller are connected .............................................................................. 38
[8] Restrictions on Pipe Length.................................................................................................... 40
III Outdoor Unit Components
[1] Outdoor Unit Components and Refrigerant Circuit ................................................................. 47
[2] Control Box of the Outdoor Unit.............................................................................................. 49
[3] Outdoor Unit Circuit Board...................................................................................................... 50
IV Remote Controller
[1] Functions and Specifications of MA and ME Remote Controllers .......................................... 59
[2] Group Settings and Interlock Settings via the ME Remote Controller .................................... 60
[3] Interlock Settings via the MA Remote Controller .................................................................... 64
[4] Using the built-in Temperature Sensor on the Remote Controller.......................................... 65
V Electrical Wiring Diagram
[1] Electrical Wiring Diagram of the Outdoor Unit ........................................................................ 69
[2] Electrical Wiring Diagram of Transmission Booster................................................................ 71
VI Refrigerant Circuit
[1] Refrigerant Circuit Diagram .................................................................................................... 75
[2] Principal Parts and Functions ................................................................................................. 78
VII Control
[1] Functions and Factory Settings of the Dipswitches ................................................................ 85
[2] Controlling the Outdoor Unit ................................................................................................... 94
[3] Operation Flow Chart............................................................................................................ 106
VIII Test Run Mode
[1] Items to be checked before a Test Run................................................................................ 113
[2] Test Run Method .................................................................................................................. 114
[3] Operating Characteristic and Refrigerant Amount................................................................ 115
[4] Adjusting the Refrigerant Amount......................................................................................... 115
[5] Refrigerant Amount Adjust Mode.......................................................................................... 119
[6] The following symptoms are normal. .................................................................................... 121
[7] Standard Operation Data (Reference Data) ......................................................................... 122
IX Troubleshooting
[1] Error Code Lists.................................................................................................................... 163
[2] Responding to Error Display on the Remote Controller........................................................ 166
[3] Investigation of Transmission Wave Shape/Noise ............................................................... 219
[4] Troubleshooting Principal Parts............................................................................................ 222
[5] Refrigerant Leak ................................................................................................................... 242
[6] Compressor Replacement Instructions................................................................................. 244
[7] Troubleshooting Using the Outdoor Unit LED Error Display................................................. 246
X LED Monitor Display on the Outdoor Unit Board
[1] How to Read the LED on the Service Monitor ...................................................................... 249
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I Read Before Servicing
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-2-
[ I Read Before Servicing ]
I Read Before Servicing
4. Preparing necessary tools: Prepare a set of tools to be used exclusively with each type of refrigerant.
Refer to page 4 for information on the use of tools.
5. Verification of the connecting pipes: Verify the type of refrigerant used for the unit to be moved or replaced.
Use refrigerant pipes made of phosphorus deoxidized copper. Keep the inner and outer surfaces of the pipes clean and free
of such contaminants as sulfur, oxides, dust, dirt, shaving particles, oil, and water.
These types of contaminants inside the refrigerant pipes may cause the refrigerant oil to deteriorate.
6. If there is a leak of gaseous refrigerant and the remaining refrigerant is exposed to an open flame, a poisonous gas
hydrofluoric acid may form. Keep workplace well ventilated.
CAUTION
Install new pipes immediately after removing old ones to keep moisture out of the refrigerant circuit.
The use of refrigerant that contains chloride, such as R22, will cause the refrigerating machine oil to deteriorate.
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[ I Read Before Servicing ]
Tools for use with R410A (Adaptability of tools that are for use with R22 or R407C)
1. To be used exclusively with R410A (not to be used if used with R22 or R407C)
2. Tools and materials that may be used with R410A with some restrictions
3. Tools and materials that are used with R22 or R407C that may also be used with R410A
Tools for R410A must be handled with special care to keep moisture and dust from infiltrating the cycle.
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[ I Read Before Servicing ]
O-material (Annealed) Soft copper pipes (annealed copper pipes). They can easily be bent with hands.
1/2H-material (Drawn) Hard copper pipes (straight pipes). They are stronger than the O-material (Annealed)
at the same radial thickness.
The distinction between O-materials (Annealed) and 1/2H-materials (Drawn) is made based on the strength of the pipes them-
selves.
The pipes in the system that uses the refrigerant currently on the market are made with O-material (Annealed), even if the
pipe diameter is less than ø19.05 (3/4"). For a system that uses R410A, use pipes that are made with 1/2H-material (Drawn)
unless the pipe diameter is at least ø19.05 (3/4") and the radial thickness is at least 1.2t.
The figures in the radial thickness column are based on the Japanese standards and provided only as a reference. Use pipes
that meet the local standards.
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[ I Read Before Servicing ]
Dimension A
ø9.52 [3/8"] 13.2 13.0
ø12.7 [1/2"] 16.6 16.2
ø15.88 [5/8"] 19.7 19.4
ø19.05 [3/4"] 24.0 23.3
If a clutch-type flare tool is used to flare the pipes in the system using R410A, the length of the pipes must be between 1.0
and 1.5 mm. For margin adjustment, a copper pipe gauge is necessary.
6. Flare nut
The flare nut type has been changed to increase the strength. The size of some of the flare nuts have also been changed.
The figures in the radial thickness column are based on the Japanese standards and provided only as a reference. Use pipes
that meet the local standards.
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[ I Read Before Servicing ]
Both ends of the pipes should be sealed until just before brazing.
Keep elbow pipes and T-joints in plastic bags.
The new refrigerator oil is 10 times as hygroscopic as the conventional refrigerating machine oil (such as Suniso) and, if not
handled with care, could easily introduce moisture into the system. Keep moisture out of the pipes, for it will cause the oil to
deteriorate and cause a compressor failure.
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[ I Read Before Servicing ]
[6] Brazing
No changes have been made in the brazing procedures. Perform brazing with special care to keep foreign objects (such as oxide
scale, water, and dust) out of the refrigerant system.
Use of oxidized solder for brazing Use of non-oxidized solder for brazing
2. Reasons
The new refrigerating machine oil is 10 times as hygroscopic as the conventional oil and is more likely to cause unit failure if
water infiltrates into the system.
Flux generally contains chloride. Residual flux in the refrigerant circuit will cause sludge to form.
3. Notes
Do not use commercially available antioxidants because they may cause the pipes to corrode or refrigerating machine oil to
deteriorate.
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[ I Read Before Servicing ]
2. Reasons
Oxygen, if used for an air tightness test, poses a risk of explosion. (Only use nitrogen to check air tightness.)
Refrigerant R410A must be charged in its liquid state. If gaseous refrigerant in the cylinder is drawn out first, the composition
of the remaining refrigerant in the cylinder will change and become unsuitable for use.
3. Notes
Procure a leak detector that is specifically designed to detect an HFC leak. A leak detector for R22 will not detect an
HFC(R410A, R407C) leak.
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[ I Read Before Servicing ]
4. Evacuation time
After the degree of vacuum has reached 5Torr(650Pa), evacuate for an additional 1 hour. (A thorough vacuum drying re-
moves moisture in the pipes.)
Verify that the vacuum degree has not risen by more than 1Torr(130Pa) 1hour after evacuation. A rise by less than
1Torr(130Pa) is acceptable.
If the vacuum is lost by more than 1Torr(130Pa), conduct evacuation, following the instructions in section 6. Special vacuum
drying.
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[ I Read Before Servicing ]
Cylin-
Cylin- der
der
Valve Valve
liquid liquid
1. Reasons
R410A is a pseudo-azeotropic HFC blend (boiling point R32=-52°C[-62°F], R125=-49°C[-52°F]) and can almost be handled
the same way as a single refrigerant, such as R22. To be safe, however, draw out the refrigerant from the cylinder in the liquid
phase. If the refrigerant in the gaseous phase is drawn out, the composition of the remaining refrigerant will change and be-
come unsuitable for use.
2. Notes
When using a cylinder with a siphon, refrigerant is charged in the liquid state without the need for turning it upside down. Check
the type of the cylinder on the label before use.
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[ I Read Before Servicing ]
2. Refrigerant composition
R410A is a pseudo-azeotropic HFC blend and can almost be handled the same way as a single refrigerant, such as R22. To
be safe, however, draw out the refrigerant from the cylinder in the liquid phase. If the refrigerant in the gaseous phase is drawn
out, the composition of the remaining refrigerant will change and become unsuitable for use.
If the refrigerant leaks out, it may be replenished. The entire refrigerant does not need to be replaced.
3. Pressure characteristics
The pressure in the system using R410A is 1.6 times as great as that in the system using R22.
Pressure (gauge)
Temperature (°C/°F) R410A R407C R22
MPa/psi MPa/psi MPa/psi
-20/-4 0.30/44 0.18/26 0.14/20
0/32 0.70/102 0.47/68 0.40/58
20/68 1.34/194 0.94/136 0.81/117
40/104 2.31/335 1.44/209 1.44/209
60/140 3.73/541 2.44/354 2.33/338
65/149 4.17/605 2.75/399 2.60/377
HWE0609A - 12 - GB
[ I Read Before Servicing ]
HFC type refrigerants use a refrigerating machine oil different from that used in the R22 system.
Note that the ester oil used in the system has properties that are different from commercially available ester oil.
2. Effects of contaminants*1
Refrigerating machine oil used in the HFC system must be handled with special care to keep contaminants out.
The table below shows the effect of contaminants in the refrigerating machine oil on the refrigeration cycle.
3. The effects of contaminants in the refrigerating machine oil on the refrigeration cycle.
Infiltration of Infiltration of contaminants into the com- Burn-in on the orbiting scroll
contaminants pressor
Sludge formation and adhesion Clogged expansion valve and capillary tubes
Mineral oil Poor cooling performance
etc. Compressor overheat
Oil degradation Burn-in on the orbiting scroll
*1. Contaminants is defined as moisture, air, processing oil, dust/dirt, wrong types of refrigerant, and refrigerating machine oil.
HWE0609A - 13 - GB
- 14 -
II Restrictions
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- 16 -
[ II Restrictions ]
II Restrictions
Outdoor Composing units Maximum total capacity Maximum number of Types of connectable in-
units of connectable indoor connectable indoor door units
units units
200 - - - 100 - 260 1 - 13 P20 - P200 models
R410A series indoor units
250 - - - 125 - 325 1 - 16
300 - - - 150 - 390
350 - - - 175 - 455 1 - 20 P20 - P250 models
R410A series indoor units
400 - - - 200 - 520 P20 - P250 models
R410A series indoor units
450 - - - 225 - 585
500 250 250 - 250 - 650
550 300 250 - 275 - 715
600 350 250 - 300 - 780 1 - 32
650 350 300 - 325 - 845
700 350 350 - 350 - 910
750 400 350 - 375 - 975
800 450 350 - 400 - 1040
850 450 400 - 425 - 1105 1 - 42
900 450 450 - 450 - 1170
950 400 300 250 475 - 1235
1000 400 300 300 500 - 1300 2 - 42
1050 400 350 300 525 - 1365
1100 400 350 350 550 - 1430
1150 450 350 350 575 - 1495
1200 450 400 350 600 - 1560
1250 450 450 350 625 - 1625
1) "Maximum total capacity of connectable indoor units" refers to the sum of the numeric values in the indoor unit model names.
2) If the total capacity of the indoor units that are connected to a given outdoor unit exceeds the capacity of the outdoor unit, the
indoor units will not be able to perform at the rated capacity when they are operated simultaneously. Select a combination of
units so that the total capacity of the connected indoor units is at or below the capacity of the outdoor unit whenever possible.
HWE0609A - 17 - GB
[ II Restrictions ]
TB TB TB TB TB TB TB TB TB TB TB TB
3 7 3 7 3 7 3 7 3 7 3 7
TB3: Terminal block for indoor-outdoor transmission line TB7: Terminal block for centralized control
Facility
All facility types
type
Type Shielded cable CVVS, CPEVS, MVVS
Cable type
Number of
2-core cable
cores
Cable size Larger than 1.25mm2 [AWG16]
Maximum transmission
line distance between the
200 m [656ft] max.
outdoor unit and the far-
thest indoor unit
Maximum transmission
line distance for central-
500 m [1640ft] max.
ized control and Indoor/
*The maximum overall line length from the power supply unit on the transmission lines for
outdoor transmission line
centralized control to each outdoor unit or to the system controller is 200m [656ft] max.
(Maximum line distance
via outdoor unit)
HWE0609A - 18 - GB
[ II Restrictions ]
*1 MA remote controller refers to MA remote controller (PAR-20MAA, PAR-21MAA), MA simple remote controller, and
wireless remote controller.
*2 M-NET remote controller refers to ME remote controller and ME simple remote controller.
*3 The use of cables that are smaller than 0.75mm2 (AWG18) is recommended for easy handling.
*4 When connected to the terminal block on the Simple remote controller, use cables that meet the cable size specifi-
cations shown in the parenthesis.
Units on which to set the switches Symbol Units to which the power must be shut off
CITY MULTI indoor unit Main/sub unit IC Outdoor units *3 and Indoor units
LOSSNAY, OA processing unit *1 LC Outdoor units *3 and LOSSNAY
M-NET remote controller Main/sub remote RC Outdoor units *3
controller
MA remote controller Main/sub remote MA Indoor units
controller
CITY MULTI outdoor unit*2 OC,OS1,OS2 Outdoor units *3
*1. Applicable when LOSSNAY units are connected to the indoor-outdoor transmission line.
*2. The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2 in the order of
capacity from large to small (if two or more units have the same capacity, in the order of address from small to large).
*3. Turn off the power to all the outdoor units in the same refrigerant circuit.
HWE0609A - 19 - GB
[ II Restrictions ]
*1. Address setting is not required for a City Multi system that consists of a single refrigerant circuit (with some exceptions).
*2. To set the M-NET remote controller address to "200", set it to "00".
*3. To set the outdoor unit address to "100," set the switches to "50."
*4. Some indoor units have 2 or 3 controller boards that require address settings.
(1) The address to be assigned to the No.1 controller board (by the power supply terminal block) must be 1 smaller than
that to the No.2 controller board.
(2) No. 2 controller board address must be equal to the sum of the No. 1 controller board address and 1, and the No.3
controller board address must equal to the No. 1 controller address and 2.
*5. The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2 in the order of
capacity from large to small (if two or more units have the same capacity, in the order of address from small to large).
HWE0609A - 20 - GB
[ II Restrictions ]
System configu- Connection to Power supply Group operation Power supply switch connector connection
ration the system con- unit for transmis- of units in a sys-
troller sion lines tem with multiple
outdoor units
System with one _ _ _ Leave CN41 as it is
outdoor unit (Factory setting)
System with Not connected _ Not grouped
multiple out-
door units Grouped Disconnect the male connector from the fe-
male power supply switch connector (CN41)
With connec- Not required Grouped/not and connect it to the female power supply
tion to the in- grouped switch connector (CN40) on only one of the
door unit outdoor units.*2
system
*Connect the S (shielded) terminal on the ter-
With connec- Not required*1 Grouped/not minal block (TB7) on the outdoor unit whose
tion to the cen- (Powered from grouped CN41 was replaced with CN40 to the
tralized control the outdoor unit) ground terminal ( ) on the electric box.
system
Required *1 Grouped/not Leave CN41 as it is
grouped (Factory setting)
*1 The need for a power supply unit for transmission lines depends on the system configuration.
*2 The replacement of the power jumper connector from CN41 to CN40 must be performed on only one outdoor unit in the
system.
(3) Settings for the centralized control switch for the outdoor unit (Factory setting: SW2-1 are set to OFF.)
*1 Set SW2-1 on all outdoor units in the same refrigerant circuit to the same setting.
*2 When only the LM adapter is connected, leave SW2-1 to OFF (as it is).
(4) Selecting the position of temperature detection for the indoor unit (Factory setting: SW1-1 set to "OFF".)
To stop the fan during heating Thermo-OFF (SW1-7 and 1-8 on the indoor units to be set to ON), use the built-in thermistor
on the remote controller or an optional thermistor.
1) To use the built-in sensor on the remote controller, set the SW1-1 to ON.
Some models of remote controllers are not equipped with a built-in temperature sensor.
Use the built-in temperature sensor on the indoor unit instead.
When using the built-in sensor on the remote controller, install the remote controller where room temperature can be detected.
(Note) Factory setting for SW1-1 on the indoor unit of the All-Fresh Models is ON.
2) When an optional temperature sensor is used, set SW1-1 to OFF, and set SW3-8 to ON.
When using an optional temperature sensor, install it where room temperature can be detected.
(5) Various start-stop controls (Indoor unit settings)
Each indoor unit (or group of indoor units) can be controlled individually by setting SW 1-9 and 1-10.
Operation of the indoor unit when the operation is resumed after the unit was Setting (SW1)*4 *5
Function
stopped 9 10
Power ON/OFF by Indoor unit will go into operation regardless of its operation status before power OFF ON
the plug*1,*2,*3 off (power failure). (In approx. 5 minutes)
Automatic restora- Indoor unit will go into operation if it was in operation when the power was turned ON OFF
tion after power fail- off (or cut off due to power failure). (In approx. 5 minutes)
ure
Indoor unit will remain stopped regardless of its operation status before power off OFF ON
(power failure).
*1. Do not cut off power to the outdoor unit. Cutting off the power supply to the outdoor unit will cut off the power supply to the
crankcase heater and may cause the compressor to malfunction when the unit is put back into operation.
*2. Not applicable to units with a built-in drain pump or humidifier.
*3. Models with a built-in drain pump cannot be turned on/off by the plug individually. All the units in the same refrigerant cir-
cuits will be turned on or off by the plug.
*4. Requires that the dipswitch settings for all the units in the group be made.
*5. To control the external input to and output from the air conditioners with the PLC software for general equipment via the
G(B)-50A, set SW1-9 and SW1-10 to ON. With these settings made, the power start-stop function becomes disabled. To
use the auto recovery function after power failure while these settings are made, set SW1-5 to ON.
HWE0609A - 21 - GB
[ II Restrictions ]
Terminal
Type Usage Function to be Option
used*1
Input Prohibiting cooling/heating operation (thermo OFF) by an ex- DEMAND (level) CN3D*2 Adapter for
ternal input to the outdoor unit. external input
*It can be used as the DEMAND control device for each sys- (PAC-
tem. SC36NA-E)
Performs a low level noise operation of the outdoor unit by an Low-noise mode (lev-
external input to the outdoor unit. el)*3*4
* It can be used as the low-noise operation device for each re-
frigerant system.
Forces the outdoor unit to perform a fan operation by receiving Snow sensor signal in- CN3S
signals from the snow sensor.*5 put (level)
Cooling/heating operation can be changed by an external in- Auto-changeover CN3N
put to the outdoor unit.
Out- How to extract signals from the outdoor unit Operation status of the CN51 Adapter for
put *It can be used as an operation status display device. compressor external out-
*It can be used for an interlock operation with external de- put
vices. Error status (PAC-
SC37SA-E)
*1. For detailed drawing, refer to "Example of wiring connection".
*2. For details, refer to 1) through 4) shown below.
*3. Low-noise mode is valid when Dip SW4-4 on the outdoor unit is set to OFF. When DIP SW4-4 is set to ON, 4 levels of
on-DEMAND are possible, using different configurations of low-noise mode input and DEMAND input settings.When 2 or
more outdoor units exist in one refrigerant circuit system, 8 levels of on-DEMAND are possible. When 3 outdoor units
exist in one refrigerant circuitsystem, 12 levels of on-DEMAND are possible.
*4. By setting Dip SW5-5, the Low-noise mode can be switched between the Capacity priority mode and the Low-noise pri-
ority mode.
When SW5-5 is set to ON: The Low-noise mode always remains effective.
When SW5-5 is set to OFF: The Low-noise mode is cancelled when certain outside temperature or pressure criteria are
met, and the unit goes into normal operation (capacity priority mode).
*5. When multiple outdoor units exist in one refrigerant circuit system, settings on every outdoor unit (signal input) are re-
quired.
HWE0609A - 22 - GB
[ II Restrictions ]
CN51 CN3S
Outdoor unit
Distant control Relay circuit Adapter 2 control board
board Relay circuit Adapter 1
Outdoor unit
CN3S
L1 control board 1
Lamp power source
X X 2
Y CN51
X Y 5
3
L2 4
3
Preparations
in the field
Maximum cable
Preparations length is 10m
in the field Maximum cable
length is 10m X : Relay Contact rating voltage >= DC15V
L1 : Outdoor unit error display lamp Contact rating current >= 0.1A
L2 : Compressor operation lamp (compressor running state) Minimum applicable load =< 1mA at DC
X, Y : Relay (coil =<0.9W : DC12V) Snow sensor : The outdoor fan runs when X is closed
1. Optional part : PAC-SC37SA-E or field supply. in stop mode or thermostat mode.
2. Optional part : PAC-SC36NA-E or field supply.
CN3D Outdoor unit Outdoor unit
Relay circuit Adapter 2 control board Relay circuit Adapter 2 control board
CN3D CN3D
X 1 X 1
2 2
Y 3 3
Preparations Preparations
in the field in the field
Maximum cable Maximum cable
length is 10m length is 10m
X : Low-noise mode X : Relay Contact rating voltage >= DC15V
Y : Compressor ON/OFF Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC
X,Y : Relay Contact rating voltage >= DC15V
Contact rating current >= 0.1A 2. Optional part : PAC-SC36NA-E or field supply.
Minimum appicable load =< 1mA at DC Low-noise mode
: : The noise level is reduced by controlling the maximum
2. Optional part : PAC-SC36NA-E or field supply. (Night mode) fan frequency and maximum compressor frequency.
CN3N
Relay circuit Adapter 2 Outdoor unit
control board X
X CN3N OFF ON
1
2 OFF Normal
Y
Y 3 ON Cooling Heating
X : Cooling / Heating
Y : Validity / Invalidity of X
Preparations X,Y : Relay Contact rating voltage >= DC15V
in the field Maximum cable Contact rating current >= 0.1A
length is 10m Minimum applicable load =< 1mA at DC
2. Optional part : PAC-SC36NA-E or field supply.
*1. When SW4-4 on the outdoor unit in one refrigerant circuit system is set to ON, this function cannot be used.
*2. This function and the 4 levels or 8 levels on-DEMAND function can be used together. Input the order to CN3D 1-2P on
the outdoor unit whose SW4-4 is set to OFF.
HWE0609A - 23 - GB
[ II Restrictions ]
2) When SW4-4 on one outdoor unit in one refrigerant circuit system is set to ON (4 levels of on-DEMAND) (*3)
CN3D 1-2P
CN3D 1-3P Open Short-circuit
Open 100% (No DEMAND) 75%
Short-circuit 0% (Compressor OFF) 50%
Note the following steps to be taken when using the STEP DEMAND
(Example) When switching from 100% to 50%
3) When SW4-4 on the two outdoor units in one refrigerant circuit system is set to ON (8 levels of on-DEMAND) (*3, *4)
4) When SW4-4 on the all outdoor units in one refrigerant circuit system is set to ON (12 levels of on-DEMAND) (*4)
*3. Input the order to CN3D on the outdoor unit whose SW4-4 is set to ON.
*4. CN3D of No. 1, 2, 3 can be selected arbitrary with the outdoor unit whose SW4-4 is set to ON.
HWE0609A - 24 - GB
[ II Restrictions ]
(3) An example of a system to which both MA remote controller and M-NET remote controller are connected
HWE0609A - 25 - GB
[ II Restrictions ]
00 00 00
00 00 00
TB5 TB15 TB5 TB15 TB5
TB3 TB7 TB3 TB7 TB3 TB7 M1M2 S 1 2 M1M2 S 1 2 M1M2 S
AB ABS AB ABS AB AB S
m1
A B A B A B
MA RC MA
L11
L12 L13
Group Group
IC IC IC
00 00 00
TB5 TB15 TB5 TB15 TB5 TB15
M1M2 S 1 2 M1M2 S 1 2 M1M2 S 1 2
m2
m4
m5
A B
A B A B A B
MA MA MA MA
m3
HWE0609A - 26 - GB
[ II Restrictions ]
The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.
HWE0609A - 27 - GB
[ II Restrictions ]
2. An example of a system with one outdoor unit to which 2 or more LOSSNAY units are connected
(manual address setup for both indoor and outdoor units)
(1) Sample control wiring
Interlock operation with
the ventilation unit
L1 L2 L3 L4
Leave the male Leave the male Leave the male Group Group
connector on CN41 as it is. connector on CN41 as it is. connector on CN41 as it is.
SW2-1 OFF SW2-1 OFF SW2-1 OFF
OS2 OS1 OC IC IC LC
01 02 05
53 52 51
TB5 TB15 TB5 TB15 TB5
TB3 TB7 TB3 TB7 TB3 TB7 M1M2 S 1 2 M1M2 S 1 2 M1M2 S
A B A B S A B A B S A B A B S
A B A B
MA MA
L11
L12 L13
Group
IC IC LC
03 04 06
TB5 TB15 TB5 TB15 TB5
M1M2 S 1 2 M1M2 S 1 2 M1M2 S
A B
MA
HWE0609A - 28 - GB
[ II Restrictions ]
4) LOSSNAY connection
(4) Wiring method
Connect terminals M1 and M2 on the terminal block
1) Indoor/outdoor transmission line
(TB5) on the indoor unit (IC) to the appropriate terminals
Same as [5] 1. on the terminal block (TB5) on LOSSNAY (LC). (Non-po-
Shielded cable connection larized two-wire)
Same as [5] 1. Interlock setting between the indoor units and LOSS-
2) Transmission line for centralized control NAY units must be entered on the remote controller. (Re-
No connection is required. fer to "4 [3] Entering the Interlock Settings into the MA
3) MA remote controller wiring Remote Controller" or the installation manual for the MA
remote controller for the setting method.)
Same as [5] 1. 5) Switch setting
When 2 remote controllers are connected to the sys-
Address setting is required as follows.
tem
Same as [5] 1.
Group operation of indoor units
Same as [5] 1.
(5) Address setting method
Address
Proce- Factory
Unit or controller setting Setting method Notes
dures setting
range
1 Indoor unit Main IC 01 to 50 Assign the smallest ad- To perform a group op- 00
unit dress to the main unit in the eration of indoor units
group. that have different func-
tions, designate the in-
Sub unit Assign sequential numbers door unit in the group
starting with the address of with the greatest num-
the main unit in the same ber of functions as the
group +1. (Main unit ad- main unit.
dress +1, main unit ad-
dress +2, main unit
address +3, etc.)
2 LOSSNAY LC 01 to 50 Assign an arbitrary but None of these address- 00
unique address to each of es may overlap any of
these units after assigning the indoor unit address-
an address to all indoor es.
units.
3 MA Main MA No - Main
remote con- remote settings re-
troller control- quired.
ler
Sub MA Sub Settings to be made ac-
remote remote cording to the remote con-
control- controller troller function selection
ler
4 Outdoor unit OC 51 to 100 Assign sequential address To set the address to 00
OS1 to the outdoor units in the 100, set the rotary
OS2 same refrigerant circuit. switches to 50.
The outdoor units are auto-
matically designated as
OC, OS1, and OS2.(Note)
The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.
HWE0609A - 29 - GB
[ II Restrictions ]
53 52 51 01 03 06 07
TB3 TB3 TB3 TB5 TB15 TB5 TB15 TB5 TB15 TB5
A B A B A B M1M2S 1 2 M1M2 S 1 2 M1M2S 1 2 M1M2 S
m2
TB7 TB7 TB7
A B S A B S A B S
Not Not
Connect Connect
Connect
A B A B A B
MA MA MA
m3
L31
L21 L22
56 55 54 02 04 05
TB3 TB3 TB3 TB5 TB15 TB5 TB15 TB5 TB15
A B A B A B M1M2S 1 2 M1M2 S 1 2 M1M2S 1 2
MA
HWE0609A - 30 - GB
[ II Restrictions ]
The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.
HWE0609A - 31 - GB
[ II Restrictions ]
4. A system in which a system controller is connected to the transmission line for centralized control and which is pow-
ered from an outdoor unit
(1) Sample control wiring
Interlock operation with
L11 L12
the ventilation unit
53 52 51 01 02 03 07
TB3 TB3 TB3 TB5 TB15 TB5 TB15 TB5 TB15 TB5
A B A B A B M1 M2 S 1 2 M1 M2 S 1 2 M1 M2 S 1 2 M1 M2 S
m1
A B S A B S A B S
Not Not
Connect Connect
Connect
A B A B A B
MA MA MA
L21 L22
56 55 54 04 05 06 08
TB3 TB3 TB3 TB5 TB15 TB5 TB15 TB5 TB15 TB5
A B A B A B M1 M2 S 1 2 M1 M2S 1 2 M1 M2S 1 2 M1 M2S
Not Not
Connect Connect
A B
Not A B
Connect
MA
MA
m3
L32
System controller
A B S
HWE0609A - 32 - GB
[ II Restrictions ]
Address
Proce- Factory
Unit or controller setting Setting method Notes
dures setting
range
1 Indoor unit Main unit IC 01 to 50 Assign the smallest ad- To perform a group oper- 00
dress to the main unit in ation of indoor units that
the group. have different functions,
designate the indoor unit
Sub unit Assign sequential num- in the group with the
bers starting with the ad- greatest number of func-
dress of the main unit in tions as the main unit.
the same group +1. (Main
unit address +1, main unit
address +2, main unit ad-
dress +3, etc.)
2 LOSSNAY LC 01 to 50 Assign an arbitrary but None of these addresses 00
unique address to each of may overlap any of the
these units after assign- indoor unit addresses.
ing an address to all in-
door units.
3 MA Main MA No - Enter the same indoor Main
remote remote settings re- unit group settings on the
controller controller quired. system controller as the
ones that were entered
Sub MA Sub Settings to be made ac- on the MA remote con-
remote remote con- cording to the remote troller.
controller troller controller function selec-
tion
4 Outdoor unit OC 51 to 100 Assign sequential ad- To set the address to 00
OS1 dress to the outdoor units 100, set the rotary
OS2 in the same refrigerant switches to 50.
circuit.
The outdoor units are au-
tomatically designated as
OC, OS1, and
OS2.(Note)
The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.
HWE0609A - 33 - GB
[ II Restrictions ]
5. An example of a system in which a system controller is connected to the indoor-outdoor transmission line (except
LM adapter)
(1) Sample control wiring
Interlock operation with
L11 L12 the ventilation unit
53 52 51 01 02 03 07
TB3 TB3 TB3 TB5 TB15 TB5 TB15 TB5 TB15 TB5
A B A B A B M1 M2 S 1 2 M1 M2 S 1 2 M1 M2 S 1 2 M1 M2 S
m1
A B S A B S A B S
Not Not
Connect Connect
Connect A B A B A B
MA MA MA
L21 L22
56 55 54 04 05 06 08
TB3 TB3 TB3 TB5 TB15 TB5 TB15 TB5 TB15 TB5
A B A B A B M1 M2 S 1 2 M1 M2 S 1 2 M1 M2 S 1 2 M1 M2 S
L25
Not Not
Connect Connect
A B
A B
Not
Connect
MA
MA
m3
Note1
Note1 LM adapters cannot be connected to the
System controller indoor-outdoor transmission line.
A B S
HWE0609A - 34 - GB
[ II Restrictions ]
The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.
HWE0609A - 35 - GB
[ II Restrictions ]
53 52 51 01 02 03 07
TB3 TB3 TB3 TB5 TB15 TB5 TB15 TB5 TB15 TB5
A B A B A B M1 M2 S 1 2 M1 M2 S 1 2 M1 M2 S 1 2 M1 M2S
m1
A BS A B S A B S
Not Not
Connect Connect
A B A B A B
Connect
101 102 103
RC RC RC
L21 L22
56 55 54 04 05 06 08
TB3 TB3 TB3 TB5 TB15 TB5 TB15 TB5 TB15 TB5
A B A B A B M1 M2S 1 2 M1 M2S 1 2 M1 M2S 1 2 M1 M2 S
Not Not
Connect Connect
m3
Not
Connect A B A B A B
RC RC RC
HWE0609A - 36 - GB
[ II Restrictions ]
The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.
HWE0609A - 37 - GB
[ II Restrictions ]
[7] An Example of a System to which both MA Remote Controller and M-NET Remote Controller are connected
(1) Sample control wiring
L11 L12
53 52 51 01 02 06
106
MA RC
L21 L22
Group
SW2-1 OFF ON SW2-1 OFF ON SW2-1 OFF ON
OS2 OS1 OC IC IC IC
56 55 54 03 04 05
TB5 TB15 TB5 TB15 TB5 TB15
TB3 TB3 TB3
M1 M2 S 1 2 M1 M2 S 1 2 M1 M2 S 1 2
A B A B A B
HWE0609A - 38 - GB
[ II Restrictions ]
Same as [5] 1.
(4) Wiring method
Group operation of indoor units
1) Indoor/outdoor transmission line
Same as [5] 1.
Same as [5] 3. 4) M-NET remote controller wiring
Shielded cable connection Same as [5] 1.
Same as [5] 1. When 2 remote controllers are connected to the sys-
2) Transmission line for centralized control tem
Same as [5] 4. Same as [5] 1.
Shielded cable connection Group operation of indoor units
Same as [5] 4. Same as [5] 1.
3) MA remote controller wiring 5) LOSSNAY connection
Same as [5] 1. Same as [5] 4.
When 2 remote controllers are connected to the sys- 6) Switch setting
tem Address setting is required as follows.
(5) Address setting method
Address
Proce- Factory
Unit or controller setting Setting method Notes
dures setting
range
1 Opera- Indoor Main unit IC 01 to 50 Assign the smallest address Assign an address smaller 00
tion with unit to the main unit in the group. than that of the indoor unit
that is connected to the M-
the Sub unit Assign sequential num- NET remote controller.
MA re- bers starting with the ad- Enter the same indoor unit
mote dress of the main unit in group settings on the system
controller as the ones that
controller the same group +1. were entered on the MA re-
(Main unit address +1, mote controller.
main unit address +2, To perform a group operation
main unit address +3, of indoor units that have dif-
etc.) ferent functions, designate
the indoor unit in the group
with the greatest number of
functions as the main unit.
MA Main MA No - Main
re- remote settings re-
controller quired.
mote
con- Sub MA Sub Settings to be made ac-
troller remote remote cording to the remote
controller controller controller function selec-
tion
2 Opera- Indoor Main unit IC 01 to 50 Assign the smallest ad- Enter the indoor unit group 00
tion with unit dress to the main unit in settings on the system con-
troller (MELANS).
the the group. Assign an address larger than
M-NET those of the indoor units that
remote Sub unit Assign sequential num- are connected to the MA re-
bers starting with the ad- mote controller.
controller dress of the main unit in To perform a group operation
the same group +1. of indoor units that have dif-
ferent functions, designate
(Main unit address +1, the indoor unit in the group
main unit address +2, with the greatest number of
main unit address +3, functions as the main unit.
etc.)
M-NET Main RC 101 to Add 100 to the main unit It is not necessary to set 101
re- remote 150 address in the group. the 100s digit.
controller To set the address to 200,
mote
set the rotary switches to
con- Sub RC 151 to Add 150 to the main 00.
troller remote 200 unit address in the
controller
group.
3 LOSSNAY LC 01 to 50 Assign an arbitrary but None of these addresses 00
unique address to each may overlap any of the in-
of these units after as- door unit addresses.
signing an address to all
indoor units.
4 Outdoor unit OC 51 to 100 Assign sequential ad- To set the address to 100, 00
OS1 dress to the outdoor set the rotary switches to
OS2 units in the same refrig- 50.
erantcircuit. The outdoor
units are automatically
designated as OC, OS1,
and OS2.(Note)
The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.
HWE0609A - 39 - GB
[ II Restrictions ]
Outdoor unit
A
H (Outdoor unit above indoor unit)
H' (Outdoor unit below indoor unit)
D Branch header
First branch
L
(Branch joint)
B cap
C d e f
Indoor Indoor Indoor
Branch joint
4 5 6
a b c
h
1 Indoor 2 Indoor 3 Indoor
Unit: m [ft]
Allowable length of
Operation Pipe sections
pipes
Length Total pipe length A+B+C+D 300 [984] or less
+a+b+c+d+e+f
Total pipe length (L) from the outdoor unit to the A+B+C+c or 150 [492] or less
farthest indoor unit A+D+f (Equivalent length 175
[574] or less)
Total pipe length from the first branch to the far- B+C+c or 40 [131] or less
thest indoor unit ( ) D+f
Height Between indoor and Outdoor unit above in- H 50 [164] or less
difference outdoor units door unit
Outdoor unit below in- H' 40 [131] or less*1
door unit
Between indoor units h 15 [49] or less
*1. 4m [13 ft] or below when performing a cooling operation at the outdoor temperature of 10°C [50 °F] or below
HWE0609A - 40 - GB
[ II Restrictions ]
Downward inclination
2m[6ft] Joint pipe
Trap
(gas pipe
A B D only)
E
Indoor Indoor Indoor Indoor
1 2 3 4 Note : "Total sum of downstream unit model numbers"
in the table is the sum of the model numbers
J K M of the units after point E in the figure.
h1
e f g i
Indoor Indoor Indoor Indoor
5 6 7 8
Unit: m [ft]
Allowable length of
Operation Pipe sections
pipes
Length Between outdoor units A+B+C+D 10 [32] or less
Total pipe length A+B+C+D+E+F+G+I+J 300 [984] or less
+K+M+a+b+c+d+e+f+g
+i
Total pipe length (L) from the outdoor unit to the A(B)+C+E+J+K+M+i 150 [492] or less
farthest indoor unit (Equivalent length 175
[574] or less)
Total pipe length from the first branch to the far- G+I+J+i 40 [131] or less
thest indoor unit ( )
Height Between indoor and outdoor units H 50 [164] or less
difference (40 [131] or below if
outdoor unit is below in-
door unit)
Between indoor units h1 15 [49] or less*1
Between outdoor units h2 0.1[0.3] or less
*1. 4m [13 ft] or below when performing a cooling operation at the outdoor temperature of 10°C [50 °F] or below
HWE0609A - 41 - GB
[ II Restrictions ]
Outdoor unit set name Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch]
(total capacity)
P200 model ø9.52 [3/8"] ø19.05 [3/4"]
P250 model ø9.52 [3/8"]*1 ø22.2 [7/8"]
*2
P300 model ø9.52 [3/8"] ø22.2 [7/8"]
P350 model ø12.7 [1/2"] ø28.58 [1-1/8"]
P400 model ø12.7 [1/2"] ø28.58 [1-1/8"]
P450 model ø15.88 [5/8"] ø28.58 [1-1/8"]
P500 model ø15.88 [5/8"] ø28.58 [1-1/8"]
P550 model ø15.88 [5/8"] ø28.58 [1-1/8"]
P600 model ø15.88 [5/8"] ø28.58 [1-1/8"]
P650 model ø15.88 [5/8"] ø28.58 [1-1/8"]
P700 - P800 model ø19.05 [3/4"] ø34.93 [1-3/8"]
P850 - P1250 model ø19.05 [3/4"] ø41.28 [1-5/8"]
*1. Use ø12.7 [1/2"] pipes if the piping length exceeds 90 m [295 ft].
*2. Use ø12.7 [1/2"] pipes if the piping length exceeds 40 m [131 ft].
(2) Size of the refrigerant pipe between the first branch and the indoor unit (indoor unit pipe size)
(3) Size of the refrigerant pipe between the branches for connection to indoor units
Total capacity of the Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch]
downstream units
- 140 ø9.52 [3/8"] ø15.88 [5/8"]
P141 - P200 ø9.52 [3/8"] ø19.05 [3/4"]
P201 - P300 ø9.52 [3/8"] ø22.2 [7/8"]
P301 - P400 ø12.7 [1/2"] ø28.58 [1-1/8"]
P401 - P650 ø15.88 [5/8"] ø28.58 [1-1/8"]
P651 - P800 ø19.05 [3/4"] ø34.93 [1-3/8"]
P801 - ø19.05 [3/4"] ø41.28 [1-5/8"]
HWE0609A - 42 - GB
[ II Restrictions ]
(4) Size of the refrigerant pipe between the first distributor and the second distributor
Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch]
ø19.05 [3/4"] ø34.93 [1-3/8"]
(5) Size of the refrigerant pipe between the first distributor or the second distributor and outdoor units
Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch]
P250 model ø9.52 [3/8"] ø22.2 [7/8"]
P300 model ø12.7 [1/2"]
P350 model ø28.58 [1-1/8"]
P400 model ø15.88 [5/8"]
P450 model
HWE0609A - 43 - GB
- 44 -
III Outdoor Unit Components
HWE0609A - 45 - GB
- 46 -
[ III Outdoor Unit Components ]
III Outdoor Unit Components
Fan guard
Fan
Control
Box
Heat exchanger
Front panel
Fin guard
HWE0609A - 47 - GB
[ III Outdoor Unit Components ]
Check valve
High pressure sensor(63HS1)
Compressor
Subcool coil
Solenoid valve (SV1a) Oil separator
Linear Expansion Valve(LEV2)
Liquid side valve Gas side valve
3. PUHY-P400, P450THM-A
(1) Refrigerant circuit
4-way valve(21S4b)
Check valve High-pressure switch(63H1)
4-way valve(21S4a)
High pressure sensor(63HS1)
Compressor cover
Accumulator
Linear Expansion
Valve(LEV1)
Solenoid valve(SV5b)
Oil separator
Solenoid valve (SV1a)
Linear Expansion Valve(LEV2)
Liquid side valve Gas side valve
HWE0609A - 48 - GB
[ III Outdoor Unit Components ]
Control board
Fan board
DC reactor (DCL)
Electromagnetic relay(72C)
Rush current
protection resistor
(R1) Note.2
Noise filter
DC reactor (DCL)
Diode stack
Noise filter
M-NET board
Current sensor
(DCCT1)
1) Exercise caution not to damage the bottom and the front panel of the control box. Damage to these parts affect the water-
proof and dust proof properties of the control box and may result in damage to its internal components.
2) Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the ter-
minals to remove them.
HWE0609A - 49 - GB
[ III Outdoor Unit Components ]
CN2
Serial communication signal input
CNDC GND(INV board) CN332 CN4
Bus voltage input Output 17VDC Output 18VDC GND
P CN801 GND Serial communication signal output
N Pressure switch (Fan board)
connection
CNAC2
L1
L2
CN505
72C
driving output LEV
driving output
LED1
CN51
Service LED
Output 12VDC
Compressor
ON/OFF output
Error output
SWU1,2
Address switch
SW1-5
Dip switch
Actuator
driving output Sensor
input
LED3
Lit
when powered
LED2
Lit during normal
CPU operation
CNVCC2
Output 12VDC
Output 5VDC
GND
External signal input (contact input)
CNAC F01 CN41 CNIT
L1 Fuse Power supply for Output 12VDC
L2 250V AC/3.15A centralized control OFF GND
CN40
Output 5VDC
Power supply for Power supply detection input
centralized control ON Power supply ON/OFF signal output
CN102
Power supply input for centralized control system (30VDC) CNS2
Indoor/outdoor transmission line input/output (30VDC) Transmission line input/output
for centralized control system (30VDC)
HWE0609A - 50 - GB
[ III Outdoor Unit Components ]
2. M-NET board
CN102
CNIT
Power supply output for centralized control system Input 12VDC
CN03 CN04 Indoor/outdoor transmission line input/output GND
F01 Bus voltage input Bus voltage ouput
P CNS2 Input 5VDC
Fuse P
N Transmission line input/output for Power supply detection output
250VAC 3.15A N Grounding centralized control system Power supply ON/OFF
signal input
LED1
Power supply
for indoor
transmission
line
HWE0609A - 51 - GB
[ III Outdoor Unit Components ]
3. INV board
(1) PUHY-P200, P250THM-A
CN6
Open: No-load operation setting
CN5V
SC-P1 Short-circuited: Normal setting
GND
Rectifier diode output (P) Output 5VDC
LED1
Lit: Inverter in normal operation
IGBT Blink: Inverter error
(Rear)
CN4
GND(INV Boar)
Serial communication signal output
C30,31,32
Smoothing capacitor
CNDC
Bus voltage output
P
N
RSH1,2
Overcurrent detection
resistor
CN2
Serial communication signal output
GND
SC-P2 Input 17VDC
Bus voltage Input(P)
SC-V
Inverter output(V)
SC-W
Inverter output(W)
TB-P(Note)
Bus voltage output(P)
TB-N(Note)
Bus voltage output(N) CT12 CT22
Current sensor(U) Current sensor(W)
SC-T
Input(L3)
SC-R SC-U
CT3 Input(L1) Inverter output(U)
Current sensor(L3)
SC-S
Input(L2)
Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the ter-
minals to remove them.
HWE0609A - 52 - GB
[ III Outdoor Unit Components ]
CNTH CNCT3
Thermistor input Current (AC) sensor input
(THHS) CNTYP (ACCT3) LED2
CNCT2 Inverter error
Function setting input
Current (AC) sensor input
(Z26) LED4
ACCT1 LED1
ACCT2 Inverter in Lit during normal SW1
normal operation CPU operation ON: No-load operation setting
OFF: Normal setting
: Fixed to OFF
CN5V
GND
Output 5VDC
CNCT
Current (DC) sensor input CN2
Serial communication
signal output
GND
Output 17VDC
FT-N(Note)
BUS voltage output(N)
CN4
GND
(Fan board)
Serial communication
signal input
LED3
Lit while charging
SC-P1
Bus voltage input/output
CNFG
Functional earth
CNIPM
IPM-P
CNDC1
BUS voltage output(P) IPM driving power supply output BUS voltage output
(IPM input) and signal output P
N F02
IPM error signal input (IPM output) Fuse
250VAC 3.15A
IPM-N
BUS voltage input/output(N)
(IPM input)
CNDC2 CNDC3
BUS voltage input BUS voltage output
P P
N N
Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the ter-
minals to remove them.
HWE0609A - 53 - GB
[ III Outdoor Unit Components ]
4. Fan board
CN4
CNVDC GND
Bus voltage input F01 LED3 CN18V Serial communication signal output
N Fuse Lit during normal Input 18VDC GND(Control board)
P 250VAC 15A CPU operation GND Serial communication signal output
CN22
GND(INV board)
Input 5VDC
Serial communication signal input
GND(INV board))
Input 17VDC
CN21
Serial communication signal output
GND(INV board)
Input 17VDC
THBOX
Thermistor
(Control box internal temperature
detection)
LED1
Inverter in normal operation
LED2
Inverter error
R630
Overcurrent detection CNINV (Rear)
DIP IPM
resistor Inverter output
W
V
U
HWE0609A - 54 - GB
[ III Outdoor Unit Components ]
5. Noise Filter
(1) PUHY-P200, P250THM-A
TB21 CN02
Input/output(L1) Output
L1
L2
Grounding
TB22
F2 Input/output(L2)
Fuse
250VAC 6.3A
TB23
Input/output(L3)
F1
Fuse
250VAC 6.3A
CN01
Input
L3
L2
L1
HWE0609A - 55 - GB
[ III Outdoor Unit Components ]
F3 Electromagnetic relay
Fuse (72C)
250VAC 6.3A
output
(Diode stack input)
CN02
Output
L1 TB23
L2 Input
(L3)
TB22
F1 Input
Fuse (L2)
250VAC 6.3A
TB21
Input
F2 (L1)
Fuse
250VAC 6.3A
CN01
Input
L3
L2
L1
HWE0609A - 56 - GB
IV Remote Controller
HWE0609A - 57 - GB
- 58 -
[ IV Remote Controller ]
IV Remote Controller
*1. MA remote controller refers to MA remote controller (PAR-20MAA, PAR-21MAA), MA simple remote controller, and wire-
less remote controller.
*2. Either the MA remote controller or the M-NET remote controller can be connected when a group operation of units in a
system with multiple outdoor units is conducted or when a system controller is connected.
*3. M-NET remote controller refers to ME remote controller and ME simple remote controller.
*4. Depending on the system configuration, some systems with one outdoor unit may require address settings.
*1. M-NET remote controller and MA remote controller cannot both be connected to the same group of indoor units.
*2. A system controller must be connected to a system to which both MA remote controller and M-NET remote controller are
connected.
HWE0609A - 59 - GB
[ IV Remote Controller ]
[2] Group Settings and Interlock Settings via the ME Remote Controller
1. Group settings/interlock settings
Make the following settings to perform a group operation of units that are connected to different outdoor units or to manually set up the
indoor/outdoor unit address.
(A) Group settings...........Registration of the indoor units to be controlled with the remote controller,
and search and deletion of registered information.
(B) Interlock settings........Registration of LOSSNAY units to be interlocked with the indoor units,
and search and deletion of registered information
[Operation Procedures]
(1) Address settings
CENTRALLY CONTROLLED 1Hr.
Register the indoor unit to be controlled with the remote controller. DAILY
AUTO OFF CLOCK
ON OFF
REMAINDER
˚C
FILTER
CHECK MODE
1 Bring up either the blinking display of HO by turning on the unit or the ˚C
STAND BY
DEFROST NOT AVAILABLE
TEST RUN
LIMIT TEMP.
The display window must look like one of the two figures below to proceed to the C CLOCK→ON→OFF FILTER
?F
next step. A
G CHECK TEST
E D
H B
[Blinking display of HO ] [Normal display]
If registration is successfully
completed, the two displays as
blinks to indicate a registration error. shown on the left will appear
(Indicates that selected address does not have a alternately.
corresponding unit.) If the registration fails,
(Displayed alternately)
will blink on the display.
5 To register the addresses for multiple indoor units, repeat
(Indicates that the selected
steps 3 and 4 above. address does not have a
corresponding unit.)
HWE0609A - 60 - GB
[ IV Remote Controller ]
Unit type
(Indoor unit in this case)
LOSSNAY can be searched in the same manner by bringing up
<No entries found> the LOSSNAY address in the Interlocked unit address display window.
To delete an address,
go to section (3) Address Deletion .
(3) Address deletion
The addresses of the indoor units that have been entered into the remote controller can be deleted by deleting the group settings.
The interlock settings between units can be deleted by deleting the interlock settings.
Follow the steps in section (2) Address Search to find the address to be deleted and perform deletion with the address being displayed in the
display window. To delete an address, the address must first be bought up on the display.
15 Delete the registered indoor unit address or the interlock setting between units.
- Press button F? [CLOCK ON OFF] twice while either the indoor unit address or the address of the interlocked unit is displayed on the
display to delete the interlock setting.
HWE0609A - 61 - GB
[ IV Remote Controller ]
If deletion is successfully
completed, - - will appear in
the unit type display window.
will be displayed in the room temperature display window. (Displayed alternately) If the deletion fails, will
appear in the unit type display
- If a transmission error occurs, the selected setting will not be window. In this case, repeat the
deleted, and the display will appear as shown below. steps above.
In this case, repeat the steps above.
<Deletion error>
(4) Making (A) Group settings and (B) Interlock settings of a group from any arbitrary remote controller
(A) Group settings and (B) Interlock settings of a group can be made from any arbitrary remote controller.
Refer to (B) Interlock Settings under section 1 Group Settings/Interlock Settings for operation procedures.
Set the address as shown below.
(A) To make group settings
Interlocked unit address display window...Remote controller address
Indoor unit address display window...........The address of the indoor unit to be controlled with the remote controller
(B) To make interlock settings
Interlocked unit address display window...LOSSNAY address
Indoor unit address display window..........The address of the indoor unit to be interlocked with the LOSSNAY
HWE0609A - 62 - GB
[ IV Remote Controller ]
[Operation Procedures]
1. Press the [ON/OFF] button on the remote controller to bring the unit to a stop. The display will appear as shown in the previous page (Normal
display).
2. Press buttons 1 [CHECK] and [ ] simultaneously for 2 seconds to go into the “Skip-Auto-Mode setting.”
under the remote controller function selection mode. Press button 2 [SET TEMP. ( )] or 3 [SET TEMP. ( )] to go into the other four modes
under the remote controller function selection mode.
When set to “ON,” the automatic operation mode is available for selection in the function selection mode.
When set to “OFF,” the automatic operation mode is not available for selection in the function selection mode, and an automatic operation
cannot be performed.
(The automatic operation mode is skipped in the function selection mode sequence.)
Operation mode display selection mode (Changing the type of display that appears during the automatic mode operation)
When connected to the air conditioning units that do not support the automatic operation mode, the setting for this mode is invalid.
will blink, and either “ON”or “OFF” will light up. Press button 4 [TIMER SET ( ) or ( )] in this state to
switch between “ON” and “OFF.”
Room temperature display selection mode (Switching between the display or non-display of room temperature on the controller)
“ 88 C ” blinks and either “ON” or “OFF” lights up on the controller. Pressing the 4 [TIMER SET ( ) or ( )] button
switches between “ON” and “OFF.”
˚C ˚C
HWE0609A - 63 - GB
[ IV Remote Controller ]
Perform this operation to enter the interlock setting between the LOSSNAY and the indoor units to which the remote controller is connected, or to
search and delete registered information.
In the following example, the address of the indoor unit is 05 and the address of the LOSSNAY unit is 30.
[Operation Procedures]
1 Press the [ON/OFF] button on the remote controller to bring the unit to a stop.
The display window on the remote controller must look like the figure below to proceed to step 2 .
2 Press and hold the [FILTER] and [ ] buttons simultaneously for two seconds to perform a search for the LOSSNAY that is interlocked with the
indoor unit to which the remote controller is connected.
3 Search result
- The indoor unit address and the interlocked LOSSNAY address will appear alternately.
<Indoor unit address and indoor unit> <LOSSNAY address and LOSSNAY>
- Without interlocked LOSSNAY settings
4 If no settings are necessary, exit the window by pressing and holding the [FILTER] and [ ] buttons simultaneously for 2 seconds.
Go to step 1. Registration Procedures to make the interlock settings with LOSSNAY units, or go to step 2. Search Procedures to search for a
particular LOSSNAY unit.
Go to step 3. Deletion Procedures to delete any LOSSNAY settings.
- Registration error
If the registration fails, the indoor unit address and the LOSSNAY address will be displayed alternately.
Registration cannot be completed: The selected unit address does not have a corresponding indoor unit or a LOSSNAY unit.
Registration cannot be completed: Another LOSSNAY has already been interlocked with the selected indoor unit.
HWE0609A - 64 - GB
[ IV Remote Controller ]
11 Press the [ ON/OFF] button twice to delete the address of the LOSSNAY unit that is interlocked with the selected indoor unit.
- Registration completed
The indoor unit address and , and the interlocked LOSSNAY address and will appear alternately.
-Deletion error
If the deletion fails
HWE0609A - 65 - GB
- 66 -
V Electrical Wiring Diagram
HWE0609A - 67 - GB
- 68 -
63H1
V Electrical Wiring Diagram
HWE0609A
FAN Board 21 12 45 CNDC 6
4 pink 12 1 3 12 21 12 5
CN18V CN4 CN21 3 1 3 CN801
blue 2 CNT01 CNT02 CN332 CN4 M
blue 1
PCB power yellow blue
CNLVA 43
F01 supply 2 LEV1
AC250V 7 1
CNVDC 15A T 6 CNAC2 circuit
CN22 5 5
2 black Power CN2
3 IPM LED3: CPU in red 4 6
3 1 failure 2
Fan motor C630 operation 1 CNLVB 54
1 2 red detection M
1 A2 3 red 3
(Heat exchanger) R630 CN505 circuit 2
CNINV 72C LEV2a
U 1 black X72 1
6 THBOX A1 white
M V
4 t° 6
3~ LED1: Normal Control Board
W 2 operation CNLVC 54
red 3 M
1 LED2: Error 2 LED1 2 LEV2b
[ V Electrical Wiring Diagram ]
SV1a CN502 1
X02
(1) PUHY-P200, P250 models
*5 R1 1
red black CH11 3
black CN503 OFF ON OFF ON OFF ON OFF ON OFF ON
14 13 1 blue X03
SWU2 SWU1 1 1 1 1 1
24 23 12 1 3
INV Board SC-P1 3 10's digit 1's digit
DCL 34 33 CN6 CN5V CN4 12
21S4a CN504
yellow 1 green X04
44 43
72C LED1: Normal operation(lit) Unit address setting 10 10 10 10 10
red /Error(blink) 1 SW5 SW4 SW3 SW2 SW1
3 LED1
SC-P2 CN51 Function setting Display
U R30 C30 C31 C32 CNDC 12V
pink 1 setting
TB-P TB-N ZNR1 RSH1 RSH2 *3 Z25
3
*5 *5 C1 4 Compressor ON/OFF output CNTYP5 3
red 1 5 green 1
IGBT 2 Error detection output Z24
C1 t° CNTYP4 2
black THHS 5 1
green
1. Electrical wiring diagram of the outdoor unit
7 4
SC-V 3 t° TH6
CN2 CN213
red 2 t° TH7
1
Noise Filter 1 3 CN02 SC-T SC-R SC-U SC-W 2
CN212 t° TH3
1
LED3:Lit when powered
CY1 CN990 21 t° TH5
CY2
CT3 CT12 CT22
DSA1 CY3 CX6 SC-S
Z4 Z3 CX4 CX5 1
CN202 32 63LS
[1] Electrical Wiring Diagram of the Outdoor Unit
U 2
TB21 red 1 3
U red black white red red white black LED2: CPU in operation 3 1
- 69 -
Z1 Z2 CN40 CN201 2 2 63HS1
U U white 1 3
CX3 TB22 1 2 3 4 ON
black F01
CX1 TB23 AC250V CN215 2 t° TH2
F1 CX2 Power selecting
3.15A T black 1
AC250V F2 connector
6.3A T AC250V yellow blue red yellow red 1 t° TH4
L1 L2 L3 red CN211 2
6.3A T CN3K CN3N CN3S CN3D CN102 CN41 CNS2 CNIT
5 3 1 CNAC
CN01 2 1 3 2 1 3 2 1 3 2 1 3 2 1 1 2 3 4 1 2 3 4 1 2 1 2 3 4 5
OFF
TB1 L1 L2 L3
CN03 1 3 1 3 CN04 4321 21 54321
red white black black red
CN102 CNS2 CNIT
V yellow red
F01 M-NET power
Power supply U W AC250V LED1: Power supply to
MS 3.15A T supply Indoor/Outdoor
3~ circuit transmission cable
3~
60Hz TB3 TB7
Motor A B A B S
208/220/230V (Compressor) TP1 TP2
L1 L2 L3 M-NET Board
*1.Single-dotted lines indicate wiring
<Symbol explanation> not supplied with the unit.
Symbol explanation Symbol Explanation *4
21S4a 4-way valve(Cooling/Heating switching) TB1 Terminal Power supply
*2.Dot-dash lines indicate the control Central control
Indoor/Outdoor
63H1 Pressure High pressure protection for the TB3 block Indoor/Outdoor transmission box boundaries.
switch outdoor unit cable
transmission transmission
63HS1 Pressure Discharge pressure TB7 Central control transmission
*3.Refer to the Data book for connecting cable cable
63LS sensor Low pressure cable input/output signal connectors.
72C Magnetic relay (inverter main circuit) TH2 Thermistor Subcool bypass outlet
CT12, 22, 3 Current sensor (AC) temperature *4.Daisy-chain terminals (TB3) on the
CH11 Crankcase heater (for heating the compressor) TH3 Pipe temperature outdoor units in the same refrigerant
DCL DC reactor TH4 Discharge pipe temperature
Linear HIC bypass,Controls refrigerant TH5 ACC inlet pipe temperature
system together.
LEV1
expansion flow in plate-type HEX in HIC TH6 Subcooled liquid refrigerant *5.Faston terminals have a locking
valve circuit temperature
Pressure control,Refrigerant flow TH7 OA temperature
function. Make sure the terminals
LEV2a, b
rate control THBOX Control box internal temperature are securely locked in place after
SV1a Solenoid valve (for opening/closing the bypass THHS IGBT temperature
circuit under the O/S) Z24, 25 Function setting connector
insertion. Press the tab on the
terminals to removed them.
GB
63H1
HWE0609A
FAN Board 21 12 45 CNDC 6
4 pink 12 1 3 12 21 12 5
CN18V CN4 CN21 3 1 3 CN801
blue 2 CNT01 CNT02 CN332 CN4 M
blue 1
PCB power yellow blue
CNLVA 34
F01 supply 2 LEV1
AC250V 7 1
CNVDC 15A T 6 CNAC2 circuit
5
CN22 5 2 black Power CN2
3 IPM LED3: CPU in red 4 6
3 1 failure 2
Fan motor C630 operation 1 CNLVB 54
1 2 detection red 3 M
(Heat exchanger) 1 3 circuit
R630 CN505 2 LEV2a
CNINV X72 1
U 1 black
6 THBOX
M V 3
4 t° 6
3~ LED1: Normal *6 21S4b CN501 X01 Control Board
operation 1 CNLVC 45
W 2 red 3 M
1 LED2: Error 2 LED1 2 LEV2b
[ V Electrical Wiring Diagram ]
SV1a CN502 1
1 X02
CH11 3
CN503 OFF ON OFF ON OFF ON OFF ON OFF ON
THHS 1 blue X03
SWU2 SWU1 1 1 1 1 1
t° Z26 3 10's digit 1's digit
21S4a CN504
1 green X04
4321 21 21 21 LED1: Normal operation 321 Unit address setting
LED2: Error 6 10 10 10 10 10
CNCT2 CNTH CNTYP CNCT3 CN5V
blue green black yellow SW5 SW4 SW3 SW2 SW1
DCL OFF ON
1 *6 SV5b CN506
3 LED1
LED4: CPU in X05 CN51 Function setting Display
red 7 1 12V
(2) PUHY-P300, P350, P400, P450 models
operation 6 setting
5 1
Noise R1 R2 SW1 CN2 *3
1 3 Z25
72C 2 Function 2
Filter TB31 3 CNCT 1 4 Compressor ON/OFF output CNTYP5 3
1 3 CN03 4 setting 5 green 1
black Error detection output Z24
1 CNTYP4 2
72C INV Board CN4 2 1
green
TB42 R01 4 t° TH6
black CN213 3
LED3: Charge red 2 t° TH7
CN02 1 3 F3 1
AC250V Z5
6.3A T U C41 black *5 CN212 2 t° TH3
FT-N 1
LED3: Lit when powered
red IPM power CN990 21 t° TH5
CY1 - + CNIPM supply
Diode Stack circuit
~ ~ ~ 1 25
CY2 DCCT1
CX6
P CNFG 2
CNDC1 blue 1
1 F02 1
CY3
CX4 CX5
1 4 AC250V
CN202 32 2 63LS
C007 C008
SC-P1
red 1 3
Z4 DSA1
U 4 3.15A T LED2: CPU in operation
Z3 3 1
- 70 -
U N CN40 CN201 2 2 63HS1
Z1 Z2 W V U pink 1 3
CNDC2
TB23 1 2 3 4
U U CNDC3 ON
IPM 4 1 3 1 F01
CX3 TB21 TB22 AC250V CN215 2 t° TH2
Power selecting black 1
black white red 3.15A T
ACCT3
F1 CX1 CX2 connector
AC250V black yellow blue red yellow red 1
F2 CN211 t° TH4
6.3A T red CN3K CN3N CN3S CN3D CN102 CN41 CNS2 CNIT 2
AC250V L1 L2 L3 CNAC
5 3 1 6.3A T 2 1 3 2 1 3 2 1 3 2 1 3 2 1 1 2 3 4 1 2 3 4 1 2 1 2 3 4 5
CN01 C1 OFF
ACCT2 ACCT1
GB
[ V Electrical Wiring Diagram ]
DSA
Green
Red
4 Black
Red 1
3
Blue Stabilized power supply 2
2 Black
Grounding 3
White
1
CN1
Choke coil CN2
CN2
1 2 1 2 1 2 S
White White Terminal block 2 for
CN3 CN4 B transmission line (TB3)
Red Red Expanded (indoor unit) side
Electronic control board A
CN1
2 1
S
Black Black Terminal block 1 for
B transmission line (TB2)
Red Red Expanded (outdoor unit) side
A
HWE0609A - 71 - GB
- 72 -
VI Refrigerant Circuit
HWE0609A - 73 - GB
- 74 -
[ VI Refrigerant Circuit ]
VI Refrigerant Circuit
21S4 BV1
ST1
TH7
63HS1
63H1
TH5 CJ2
SV1a
ST3 CP1
63LS
ACC
TH4
Comp
ST6
ST7
TH2 LEV2b
LEV1 TH6
SCC (HIC Circuit)
CJ2
BV1
21S4a ST1
21S4b
63LS
63HS1 63H1 CJ1
TH7 CV1
CP1
O/S
ST3
TH5
SV1a
TH4
Comp
ST6
ST7
TH2 LEV2b
HWE0609A - 75 - GB
[ VI Refrigerant Circuit ]
(3) PUHY-P500, P550, P600, P650, P700, P750, P800, P850, P900 models
BV1
21S4
[1] ST1
CV1
TH7
63HS1
CJ1
63H1 CJ2
CP1
TH5 Gas
O/S separator
ST3
63LS
SV1a TH5
ACC
TH4
Comp
ST6
ST7
LEV2 × 2
TH2
LEV2b
TH6
SCC (HIC Circuit) LEV1
BV1
21S4 ST1
[2]
Liquid
TH7 CV1 separator
63HS1
CJ1
63H1
CJ2
CP1
O/S
TH5
ST3
ACC
TH4
Comp
ST6
ST7
TH2
LEV2b
TH6
SCC (HIC Circuit) LEV1
*1. The diagram above shows the refrigerant circuit of the P500, P550, P600, P650, and P700 models,
which consist of two units that are smaller than P400. The P750, P800, P850, and P900 models
consist of at least one P400 or P450 unit, whose refrigerant circuit diagram is different from that of
the smaller units that is shown in the diagram above.
HWE0609A - 76 - GB
[ VI Refrigerant Circuit ]
CV1
TH7
63HS1 CJ1
63H1
CJ2
CP1
O/S TH5 Gas
separator
ST3
63LS
SV1a TH5
Gas
separator
ACC
TH4
Comp
ST6
ST7
TH2
LEV2b
TH6
SCC (HIC Circuit) LEV1
21S4 BV1
ST1
[2]
CJ2 Liquid
CV1 separator
TH7
63HS1
CJ1
63H1
CJ2
CP1 TH5
O/S
ST3 Liquid
63LS separator
SV1a TH5
ACC
TH4
Comp
ST6
ST7
TH2
LEV2b
TH6
SCC (HIC Circuit) LEV1
CJ2
[3]
21S4a ST1 BV1
21S4b
63LS
CV1
63HS1
TH7
63H1
CJ1
CP1
O/S
ST3
TH5
SV1a
TH4
Comp
ST6
ST7
TH2
LEV2b
LEV1 TH6
SCC (HIC Circuit)
* The diagram above shows the refrigerant circuit of the P950, 1000, 1050, 1100, and 1150 models,
which consist of one P400 or P450 unit ([3] in the diagram above.) and two units that are smaller
than P400 ([1] and [2] in the diagram above.) Since the P1200 and P1250 models consist of two
units that are P400 and above, their refrigerant circuit diagrams will look slightly different from the
one shown above.
HWE0609A - 77 - GB
[ VI Refrigerant Circuit ]
Part Symbols
Notes Usage Specifications Check method
name (functions)
Compres- MC1 Adjusts the amount of circulating P200 - P250 models
sor (Comp1) refrigerant by adjusting the oper- Low-pressure shell scroll
ating frequency based on the compressor
operating pressure data Wirewound resistance
20°C[68°F] : 0.268ohm
P300 - P450 models
Low-pressure shell scroll
compressor
Wirewound resistance
20°C[68°F] : 0.161ohm
High 63HS1 1) Detects high pressure Pressure
pressure 2) Regulates frequency and 63HS1 0~4.15 MPa [601psi]
Vout 0.5~3.5V
sensor provides high-pressure pro- 123 0.071V/0.098 MPa [14psi]
Pressure [MPa]
tection Con-
=1.38 x Vout [V]-0.69
nector
Pressure [psi]
=(1.38 x Vout [V] - 0.69) x 145
1 GND (Black)
2 Vout (White)
3
Vcc (DC5V) (Red)
1 GND (Black)
2 Vout (White)
3
Vcc (DC5V) (Red)
HWE0609A - 78 - GB
[ VI Refrigerant Circuit ]
Part Symbols
Notes Usage Specifications Check method
name (functions)
Ther- TH4 1) Detects discharge air tem- Degrees Celsius Resistance
mistor (Discharge) perature R 120 = 7.465k check
2) Provides high-pressure R 25/120 = 4057
Rt =
protection 1 1
7.465 exp 4057
273 t 393
0°C[32°F] :698kohm
10°C[50°F] :413kohm
20°C[68°F] :250kohm
30°C[86°F] :160kohm
40°C[104°F] :104kohm
50°C[122°F] : 70kohm
60°C[140°F] : 48kohm
70°C[158°F] : 34kohm
80°C[176°F] : 24kohm
90°C[194°F] :17.5kohm
100°C[212°F] :13.0kohm
110°C[230°F] : 9.8kohm
TH2 LEV 1 is controlled based on the Degrees Celsius Resistance
TH2, TH3, and TH6 values. R 0 = 15k check
R 0/80 = 3460
TH3 1) Controls frequency R t = 15 exp 3460
1 1
(Pipe 2) Controls defrosting during 273 t 273
temperature) heating operation
3) Detects subcool at the heat
0°C[32°F] :15kohm
exchanger outlet and con- 10°C[50°F] :9.7kohm
trols LEV1 based on HPS 20°C[68°F] :6.4kohm
data and TH3 data 25°C[77°F] :5.3kohm
30°C[86°F] :4.3kohm
TH7 1) Detects outdoor air temper-
40°C[104°F] :3.1kohm
(Outdoor ature
temperature) 2) Controls fan operation
TH5 LEV2a and LEV2b are con-
trolled based on the 63LS and
TH5 values.
TH6 Controls LEV1 based on TH2,
TH3, and TH6 data.
THHS P300 Controls inverter cooling fan Degrees Celsius
Inverter model based on THHS temperature
R 50 = 17k
heat sink only R 25/120 = 4016
temperature R t = 17 exp 4016
1 1
273 t 323
THBOX
Control box
internal tem- 0°C[32°F] :161kohm
perature de- 10°C[50°F] :97kohm
tection 20°C[68°F] :60kohm
25°C[77°F] :48kohm
30°C[86°F] :39kohm
40°C[104°F] :25kohm
Solenoid SV1a 1) High/low pressure bypass AC208-230V Continuity
valve Discharge- at start-up and stopping, Open while being powered/ check with a
suction and capacity control during closed while not being powered tester
bypass low-load operation
2) High-pressure-rise preven-
tion
SV5b P400- Controls outdoor unit heat ex-
Heat P450 changer capacity
exchanger models
capacity only
control
HWE0609A - 79 - GB
[ VI Refrigerant Circuit ]
Part Symbols
Notes Usage Specifications Check method
name (functions)
Linear ex- LEV1 Adjusts the amount of bypass DC12V Same as in-
pansion (SC control) flow from the liquid pipe on the Opening of a valve driven by a door LEV
valve outdoor unit during cooling stepping motor 0-480 pulses The resistance
(direct driven type) value differs
from that of the
indoor LEV.
(Refer to the
section "LEV
Troubleshoot-
ing.")
LEV2a Adjusts refrigerant flow during DC12V Same as in-
LEV2b heating Opening of a valve driven by a door LEV
(Refrigerant stepping motor 1400 pulses
flow adjust-
ment)
Heater CH11 Heats the refrigerant in the com- Cord heater AC230V Resistance
pressor P200 - P250 models check
1511 ohm 35W
P300 - P450 models
1176 ohm 45W
4-way 21S4a Changeover between heating AC208-230V Continuity
valve and cooling Dead: cooling cycle check with a
Live: heating cycle tester
21S4b P400- 1) Changeover between heat- AC208-230V
P450 ing and cooling Dead: cooling cycle
models 2) Controls outdoor unit heat Outdoor unit heat exchanger
only exchanger capacity capacity at 100%
Live: heating cycle
Outdoor unit heat exchanger
capacity at 50%
or heating cycle
HWE0609A - 80 - GB
[ VI Refrigerant Circuit ]
2. Indoor Unit
Part Symbol
Notes Usage Specification Check method
Name (functions)
Linear LEV 1) Adjusts superheat at the DC12V Refer to the section
expan- indoor heat exchanger Opening of stepping motor "Continuity Test with a
sion valve outlet during cooling driving valve 0-(1400) puls- Tester".
2) Adjusts subcool at the es Continuity between
heat exchanger outlet of white, red, and or-
ange.
the indoor unit during
Continuity between
cooling yellow, brown, and
blue.
White
M
Red
Orange
Yellow Brown Blue
HWE0609A - 81 - GB
- 82 -
VII Control
HWE0609A - 83 - GB
- 84 -
[ VII Control ]
VII Control
1) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.
2) A: Only the switch on either the OC or OS needs to be set for the setting to be effective on both units.
B: The switches on both the OC and OS need to be set to the same setting for the setting to be effective.
C: The setting is effective for the unit on which the setting is made.
HWE0609A - 85 - GB
[ VII Control ]
1) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.
2) A: Only the switch on either the OC or OS needs to be set for the setting to be effective on both units.
B: The switches on both the OC and OS need to be set to the same setting for the setting to be effective.
C: The setting is effective for the unit on which the setting is made.
3) The noise level is reduced by controlling the compressor frequency and outdoor fan rotation speed.
Setting of CN3D is required.
HWE0609A - 86 - GB
[ VII Control ]
1) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.
2) A: Only the switch on either the OC or OS needs to be set for the setting to be effective on both units.
B: The switches on both the OC and OS need to be set to the same setting for the setting to be effective.
C: The setting is effective for the unit on which the setting is made.
3) When set to the capacity priority mode and if the following conditions are met, the low-noise mode will terminate, and the unit
will go back into the normal operation mode.
Cooling: Outside temperature is high or high pressure is high.
Heating: Outside temperature is low or low pressure is low.
4) The table below summarizes the factory settings for dipswitches SW5-1 through SW5-4, and SW5-7. The factory setting for
all other dipswitches is OFF.
SW 5
model
1 2 3 4 7
OFF ON OFF OFF ON P200 model
ON ON OFF OFF ON P250 model
OFF OFF ON OFF ON P300 model
OFF ON ON OFF ON P350 model
ON ON ON OFF ON P400 model
OFF OFF OFF ON ON P450 model
HWE0609A - 87 - GB
[ VII Control ]
All are set to OFF at factory shipment. Unless otherwise specified, set the switch to OFF where indicated by "-," which may
be set to a certain setting for a reason.
Leave SW1-1 to OFF during normal operation. If it is set to ON, errors cannot be detected and the unit may be damaged.
HWE0609A - 88 - GB
[ VII Control ]
SW3 5 - - -
Vane angle limit setting Always set to Downblow B or C on
for cooling operation Downblow B,C Horizontal PKFY-VAM model units
6
Initial vane position Enabled Disabled PLFY-VLMD model only
Note 1. Settings in the shaded areas are factory settings.(Refer to the table below for the factory setting of the switches whose factory settings are not indicated by the shaded cells.)
Note 2. If both SW1-7 and SW1-8 are set to ON, the fan remains stopped during heating Thermo-OFF.
To prevent incorrect temperature detection due to a build-up of warm air around the indoor unit, use the built-in temperature sensor on the remote controller (SW1-1)
instead of the one on the indoor unit inlet thermistor.
Note 3. By setting SW3-1, SW1-7, and SW1-8 to a certain configuration, the fan can be set to remain stopped during cooling Thermo-OFF. See the table below for details.
HWE0609A - 89 - GB
[ VII Control ]
HWE0609A - 90 - GB
[ VII Control ]
2) SW2
Model P20 P25 P32 P40 P50 P63 P71 P80 P100 P125 P140 P200 P250
Capacity (model) code 4 5 6 8 10 13 14 16 20 25 28 40 50
SW2 123456 123456 123456 123456 123456 123456 123456 123456 123456 123456 123456
ON
123456
ON
123456
ON ON ON ON ON ON ON ON ON ON ON
setting OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF
Note. The setting timing for SW2 is before power is turned on.
220V
SW5 240V
ON ON : 220V
230V
OFF OFF : 240V
(PCFY-P-VGM-E)
Ceiling height
SWA Ceiling height Anytime after power on
3 3 3.5m[11ft]
setting 2 2 2.8m[9ft]
1 1 2.3m[7ft]
(PDFY-P20-80VM-E, PEFY-P20-80VMM-E)
3 100Pa
2 50Pa
1 30Pa
SWA Static pressure For the models other than the ones listed above, change
setting the static pressure setting by changing the connectors.
Anytime after power on
(PEFY-VMS-E)
SWA SWC
5Pa 1 Option
15Pa 1 Standard
35Pa 2 Standard
50Pa 3 Standard
(PLFY-P-VAM-E)
2 directions
3 directions
4 directions
SWB Number of SWB
unit setting SWA
1 2 3 Anytime after power on
4.0m[13ft] 4.2m[13ft]
2 directions (3.3m[10ft]) (3.5m[11ft])
3.6m[11ft] 4.0m[13ft] 4.2m[13ft]
3 directions (3.0m[9ft]) (3.3m[10ft]) (3.5m[11ft])
4 directions 3.2m[10ft] 3.6m[11ft] 4.2m[13ft]
(2.7m[8ft]) (3.0m[9ft]) (3.5m[11ft])
The figures in the parentheses apply to the P32-P80 models.
HWE0609A - 91 - GB
[ VII Control ]
ON
1 2 3 4
The MA remote controller (PAR-21MAA) does not have the switches listed above. Refer to the installation manual for the func-
tion setting.
HWE0609A - 92 - GB
[ VII Control ]
Rotary switch
01 01
78 9
78 9
23
23
4 56 4 56
(left) (right)
78 9
78 9
23
23
45 6 4 56
To set addresses, use a precision slotted screw driver [2.0 mm [0.08 in] (w)], and do not apply than 19.6N.
The use of any other tool or applying too much load may damage the switch.
HWE0609A - 93 - GB
[ VII Control ]
Outdoor unit
OS2
Indoor unit
RC
SW1 Display
1 2 3 4 5 6 7 8 9 10 The unit is designated as the OC: “oc” appears on the display.
ON The unit is designated as OS1: “oS-1” appears on the display
The unit is designated as OS2: “oS-2” appears on the display.
The startup sequence of the outdoor units can be checked with the self-diagnosis switch (SW1) on the OC.
SW1 Display
1 2 3 4 5 6 7 8 9 10 OC→OS1→OS2: “oc” and the OC address appear alternately on the display.
ON OS1→OS2→OC: “oS-1” and the OS1 address appear alternately on the display.
OS2→OC→OS1: “oS-2” and the OS2 address appear alternately on the display.
HWE0609A - 94 - GB
[ VII Control ]
SV1a
Operation
ON OFF
When starting-up the compressor of each ON for 4 minutes.
outdoor unit
After the restoration of thermo or 3 minutes ON for 4 minutes.
after restart
During cooling or heating operation with the Always ON.
compressor stopped Exception: OFF when 63HS1-63LS is 0.2 MPa [29 psi] or less
After the operation has stopped ON for 3 minutes.
Exception: OFF when 63HS1-63LS is 0.2 MPa [29 psi] or less
During defrost operation Always ON
During oil-recovery operation Always OFF during cooling operation and always ON during heating op-
eration when running an oil-recovery operation after running a continuous
operation at low frequency.
While the compressor is operating at the min- When low pressure (63LS) drops When low pressure (63LS) ex-
imum frequency and when the low pressure below 0.23 MPa [33 psi]. ceeds 0.38 MPa [55 psi].
(63LS) drops (3 or more minutes after com-
pressor startup)
When high pressure (63HS1) rises When 63HS1 exceeds When 63HS1 is or below
3.62 MPa [525 psi] 3.43 MPa [497 psi] and 30 seconds
have passed
HWE0609A - 95 - GB
[ VII Control ]
The maximum frequency during heating operation is affected by the outdoor air temperature to a certain extent.
HWE0609A - 96 - GB
[ VII Control ]
TH3
Model
SW3 - 3 OFF SW3 - 3 ON
200 model - 10°C [14°F] - 5°C [23°F]
250 model - 10°C [14°F] - 5°C [23°F]
300 model - 10°C [14°F] - 5°C [23°F]
350 model - 10°C [14°F] - 5°C [23°F]
400 model - 8°C [18°F] - 5°C [23°F]
450 model - 8°C [18°F] - 5°C [23°F]
(5) Change in the number of operating indoor units during defrost operation
Even when there is a change in the number of operating indoor units during defrost operation, the operation will continue, and
an adjustment will be made after the completion of the defrost operation.
Defrost operation will be continued, even if the indoor units stop or under the Thermo-OFF conditions until it has run its course.
HWE0609A - 97 - GB
[ VII Control ]
Refrigerant recovery
1) Refrigerant is recovered with the LEV on the applicable indoor unit (unit under stopping mode, fan mode, cooling, heating with
thermo off) being opened for 30 seconds.
30 seconds
Initial opening of LEV
Start Finish
2) Periodic capacity control of the outdoor units and periodic LEV control of the indoor units will be suspended during refrigerant
recovery operation; they will be performed after the recovery has been completed.
Refrigerant recovery
The opening of LEV1 is increased and periodic control begins again.
(2) Control
Outdoor unit fan stops while the compressor is stopped (except in the presence of input from snow sensor).
The fan operates at full speed for 5 seconds after start-up.(Only when TH7<0°C [32°F])
The outdoor unit fan stops during defrost operation.
HWE0609A - 98 - GB
[ VII Control ]
50 F 60Hz
Completed in the integrated operation time of 30 minutes.
F < 50Hz
Completed in the integrated operation time of 90 minutes.
HWE0609A - 99 - GB
[ VII Control ]
(2) P500, P550, P600, P650, P700, P750, P800, P850, P900 models
Yes
The compressor on the OC remains in operation, and the The compressor on the OC starts up.
compressor on the OS starts up. *1
50 F 60Hz (both OC and OS) 50 F 60Hz (OC)
Completed in the integrated operation time of 30 minutes. Completed in the integrated operation time of 30 minutes.
F < 50Hz (both OC and OS) F < 50Hz (OC)
Completed in the integrated operation time of 90 minutes. Completed in the integrated operation time of 90 minutes.
*1
The air conditioning load is too small
Both the OC and OS stop.
for both the OC and the OS to
simultaneously stay in operation. The startup sequence of the OC and OS is rotated.
HWE0609A - 100 - GB
[ VII Control ]
Yes
The compressor on the OS remains in operation, and the The compressor on the OC remains in operation, The compressor on the OC starts up.
compressors on the OS1 and OS2 start up. and the compressor on the OS1 starts up.
50 F 60Hz (OC, OS1, and OS2) *1 *2 50 F 60Hz (OC)
50 F 60Hz (both OC and OS1)
Completed in the integrated operation time of 30 minutes. Completed in the integrated operation time of 30 minutes. Completed in the integrated operation time of 30 minutes.
F < 50Hz (OC, OS1, and OS2) F < 50Hz (both OC and OS1) F < 50Hz (OC)
Completed in the integrated operation time of 90 minutes. Completed in the integrated operation time of 90 minutes. Completed in the integrated operation time of 90 minutes.
*2
The air conditioning load is too small
for both the OC and the OS1 to The OC, OS1, and OS2 stop.
simultaneously stay in operation. The startup sequence of the OC,
OS1, and OS2 is rotated.
HWE0609A - 101 - GB
[ VII Control ]
OC failure OS failure
pattern pattern
OC Trouble Normal
OS Normal Trouble
Emergency Cooling Permitted Permitted
operation Heating Permitted Permitted
Maximum total capacity
of indoor units (Note 1) 60%
OC failure OS1 failure OS2 failure OC, OS1 failure OC, OS2 failure OS1, OS2 failure
pattern pattern pattern pattern pattern pattern
OC Trouble Normal Normal Trouble Trouble Normal
OS1 Normal Trouble Normal Trouble Normal Trouble
OS2 Normal Normal Trouble Normal Trouble Trouble
Emergency Cooling Permitted Permitted Permitted Permitted Permitted Permitted
operation Heating Permitted Permitted Permitted Permitted Permitted Permitted
Maximum total capacity
60% 40%
of indoor units (Note 1)
(Note 1) If an attempt is made to put into operation a group of indoor units whose total capacity exceeds the maximum allowable capacity,
some of the indoor units will go into the same condition as Thermo-OFF.
HWE0609A - 102 - GB
[ VII Control ]
2. Communication circuit failure or when some of the outdoor units are turned off
This is a temporary operation mode in which the outdoor unit that is not in trouble operates when communication circuit failure
occurs or when some of the outdoor units are turned off.
Error codes that permit an emergency operation (Applicable to both OC and OS)
HWE0609A - 103 - GB
[ VII Control ]
OC failure OS failure
pattern pattern
OC Trouble Normal
OS Normal Trouble
Emergency Cooling Permitted Permitted
operation Heating Permitted Permitted
Maximum total capacity Capacity that matches
the total capacity of the
of indoor units (Note 1) operable outdoor units
OC failure OS1 failure OS2 failure OC, OS1 failure OC, OS2 failure OS1, OS2 failure
pattern pattern pattern pattern pattern pattern
OC Trouble Normal Normal Trouble Trouble Normal
OS1 Normal Trouble Normal Trouble Normal Trouble
OS2 Normal Normal Trouble Normal Trouble Trouble
Emergency Cooling Permitted Permitted Permitted Permitted Permitted Permitted
operation Heating Permitted Permitted Permitted Permitted Permitted Permitted
Maximum total capacity
Capacity that matches the total capacity of the operable outdoor units
of indoor units (Note 1)
(Note 1) If an attempt is made to put into operation a group of indoor units whose total capacity exceeds the maximum allowable capacity,
some of the indoor units will go into the same condition as Thermo-OFF.
1 Cooling mode
2 Heating mode
3 Dry mode
4 Fan mode
5 Stopping mode
When the outdoor unit is performing a cooling operation, the operation mode of the connected indoor units that are not in the
cooling mode (Stopped, Fan, Thermo-OFF) cannot be changed to heating from the remote controller. If this attempt is mode,
"Heating" will flash on the remote controller. The opposite is true when the outdoor unit is performing a heating operation. (The
first selection has the priority.)
HWE0609A - 104 - GB
[ VII Control ]
When DIP SW4-4 is set to ON, the 4-step DEMAND control is enabled.
Eight-step demand control is possible in the system with two outdoor units.
Twelve-step demand control is possible in the system with three outdoor units.
Refer to Chapter 2 -[3]- 2. -(7) "Various types of control using input-output signal connector on the outdoor unit (various con-
nection options)" for details.
HWE0609A - 105 - GB
[ VII Control ]
Start
Normal operation
Error
Breaker NO
turned on Unit in the stopped state
YES
1 From outdoor unit
Operation SW YES
turned on
NO
1. Protection function
self-holding cancelled. *Note 1
2. Indoor unit LEV fully closed.
*Note 2
Remote controller
display lit off NO
Error mode
YES
Operation mode
YES Error stop
Auxiliary heater
ON
NO
Error display Cooling mode Heating mode Dry mode Fan mode
1. Auxiliary heater OFF FAN stop
2. Low fan speed for
1 minute
Self-holding of Cooling display Heating display
protection function Dry display Fan display
*Note 3 *Note 3 *Note 3
YES YES YES
Error command
YES Drain pump
to outdoor unit Prohibition Prohibition Prohibition
ON
NO NO NO
NO Indoor unit LEV
3-minute fully closed.
drain pump ON
*Note 1
Refer to 2-(1) Refer to 2-(2) Refer to 2-(3) Fan operations
Cooling operation. Heating operation. for dry operation.
Prohibition
"Blinking display on
the remote controller"
HWE0609A - 106 - GB
[ VII Control ]
Error
Breaker NO
turned on Unit in the stopped state
YES
"HO" / "PLEASE WAIT" blinks on
the remote controller *Note 1
Indoor units
registered to the
NO remote controller
YES
2 From indoor unit
NO Operation
command
1. Protection function self-holding cancelled.
2. LEV1 fully closed. YES
Operation
mode Cooling / Heating
*Note 2
YES
Error mode
NO Error stop
Error command to
Refer to Cooling/Dry
indoor unit
Refer to heating
Operation 2-(1) and 2-(3) Operation 2-(2).
*Note 1. For about 3 minutes after power on, search for the indoor unit address, for the remote controller address,
and for the group information will start. During this, "HO" / "PLEASE WAIT" blinks on the display of the remote
controller. When the indoor unit to be controlled by the remote controller is missing, "HO" / "PLEASE WAIT" keeps
blinking on the display of the remote controller even after 3 or more minutes after power on.
*Note 2. The system may go into the error mode on either the indoor unit or the outdoor unit side. The outdoor stops only
when all of the connected indoor units are experiencing problems. The operation of even a single indoor unit will
keep the outdoor unit running. The error will be indicated on the LED display.
*Note 3. The outdoor unit operates according to the operation mode commanded by the indoor unit. However, when the
outdoor unit is running a cooling operation, come of the operating indoor units will stop, or the operation of these
indoor units will be prohibited even when the indoor unit mode is switched from fan mode to heating mode.
This also applies when the outdoor unit is running a heating operation.
HWE0609A - 107 - GB
[ VII Control ]
Cooling operation
Normal operation
NO
NO
Thermostat ON
YES
YES
3-minute restart
prevention
NO
*Note 1. The indoor fan operates at the set notch under cooling mode regardless of the ON/OFF state of the thermostat.
HWE0609A - 108 - GB
[ VII Control ]
Normal operation
Defrost operation
Heating operation Unit in the stopped state
*Note 1,2
During test run mode
Defrost YES
operation
NO
YES
*Note 1,2
Stopping the NO
YES
3-minute restart defrost operation
prevention
NO YES
*Note 1. When outdoor unit starts defrosting, it transmits defrost operations command to indoor unit, and the indoor unit starts
defrosting operations. Similarly when defrosting operation stops, indoor unit returns to heating operation after receiving
defrost end command of outdoor unit.
*Note 2. Defrost end condition: 12 or more minutes must pass after defrost operation.
or
Outdoor unit piping temperature: refer to "-6-. Defrost operation control" of [2] Controlling the Outdoor Unit.
HWE0609A - 109 - GB
[ VII Control ]
Thermostat ON
4-way valve OFF
Unit in the stopped state
NO
Suction temperature
18 C[64 F]
YES
*Note 1
1. Indoor unit fan stop 1. Outdoor unit (compressor)
2. Inverter output 0Hz intermittent operation
3. Indoor unit LEV, LEV1 fully closed. 2. Indoor unit fan intermittent operations
LEV2a, LEV2b rated opening. (Synchronized with the compressor:
4. Solenoid valve OFF low speed, OFF operations)
5. Outdoor unit fan stop
6. 72C OFF
[1] or [2]
*Note 1.When the indoor unit inlet temperature exceeds 18°C [64°F], the outdoor unit (compressor) and the
indoor unit fan start the intermittent operation simultaneously. When the indoor unit inlet temperature
becomes 18°C [64°F],or less, the fan always runs (at low speed). The outdoor unit, the indoor unit,
and the solenoid valve operate in the same way as they do in the cooling operation when the compressor
is turned on.
*Note 2.Thermostat is always kept on during test run mode, and indoor and outdoor unit intermittent operation
(ON) time is a little longer than that of normal operation.
HWE0609A - 110 - GB
VIII Test Run Mode
HWE0609A - 111 - GB
- 112 -
[ VIII Test Run Mode ]
VIII Test Run Mode
(2) Measure the insulation resistance between the power supply terminal block and the ground with a 500V megger and
make sure it reads at least 1.0Mohm.
Do not operate the unit if the insulation resistance is below 1.0Mohm.
Do not apply megger voltage to the terminal block for transmission line. Doing so will damage the controller board.
The insulation resistance between the power supply terminal block and the ground could go down to close to 1Mohm imme-
diately after installation or when the power is kept off for an extended period of time because of the accumulation of refrigerant
in the compressor.
If insulation resistance reads at least 1Mohm, by turning on the main power and powering the crankcase heater for at least
12 hours, the refrigerant in the compressor will evaporate and the insulation resistance will go up.
Do not measure the insulation resistance of the terminal block for transmission line for the unit remote controller.
(3) Make sure that the stop valve on the gas pipe, liquid pipe, and oil balance pipe are fully open.
(4) Check the phase sequence and the voltage of the 3-phase power supply.
If the outdoor units are turned on first, the connection information for the refrigerant circuit may not be properly recognized.
In case the outdoor units are turned on before the transmission booster is turned on, perform a power reset on the outdoor
units after turning on the power booster.
(6) Turn on the main power to the unit at least 12 hours before test run to power the crankcase heater.
(7) When a power supply unit is connected to the transmission line for centralized control, perform a test run with the
power supply unit being energized. Leave the power jumper connector on CN41 as it is (factory setting).
HWE0609A - 113 - GB
[ VIII Test Run Mode ]
Down
Fan Speed button
Up
To preceding
operation number.
Ventilation button
( Operation button)
To next operation
number.
Operation procedures
Turn on the main power. "PLEASE WAIT" appears on the LCD for up to five minutes. Leave
the power on for 12 hours. (Energize the crankcase heater.)
Press the Test button twice. Operation mode display "TEST RUN" and OPERATION MODE are
displayed alternately.
Press the Operation Mode button. Make sure that the air is blowing out.
Switch to cooling (or heating) operation by pressing the Operation Mode button.
Make sure that cold (or warm) air blows out.
Press the Fan Speed button. Make sure that the fan speed changes with each pressing of the button.
Change the air flow direction by pressing the Vertical Air Direction button or the Louver button.
Make sure that the air flow direction changes with each pressing of the button.
HWE0609A - 114 - GB
[ VIII Test Run Mode ]
The system comes to an abnormal stop, displaying 1500 (overcharged refrigerant) on Overcharged refrigerant
the controller.
The operating frequency does not reach the set frequency, and there is a problem with Insufficient refrigerant amount
performance.
The system comes to an abnormal stop, displaying 1102 (abnormal discharge temper-
ature) on the controller.
2. Amount of refrigerant
(1) To be checked during operation
Operate all indoor units in either cooling-only or heating-only mode, and check such items as discharge temperature, subcool-
ing, low pressure, suction temperature, and shell bottom temperature to estimate the amount of refrigerant in the system.
Symptoms Conclusion
Discharge temperature is high. (Normal discharge temperature is below 95°C [203°F].) Slightly under-
charged refrigerant
Low pressure is unusually low.
Suction superheat is large. (Normal suction superheat is less than 20°C [36°F].)
Compressor shell bottom temperature is high. (The difference between the compressor shell
bottom temperature and low pressure saturation temperature (Te) is greater than 60°C [108°F].)
Discharge superheat is small. (Normal discharge superheat is greater than 10°C[18°F].) Slightly overcharged
refrigerant
Compressor shell bottom temperature is low. (The difference between the compressor shell bot-
tom temperature and low pressure saturation temperature (Te) is less than 5°C [9°F].)
HWE0609A - 115 - GB
[ VIII Test Run Mode ]
HWE0609A - 116 - GB
[ VIII Test Run Mode ]
Amount of added refrigerant (kg) = (0.29x L1) + (0.2 x L2) + (0.12 x L3) + (0.06 x L4) + (0.024 x L5) +α
Amount of added refrigerant (oz) = (3.12x L1' ) +(2.15 x L2' ) + (1.29 x L3' ) + (0.65 x L4' ) + (0.26 x L5' ) + α'
L1 : Length of ø19.05 [3/4"] liquid pipe (m) L1' : Length of ø19.05 [3/4"] liquid pipe [ft]
L2 : Length of ø15.88 [5/8"] liquid pipe (m) L2' : Length of ø15.88 [5/8"] liquid pipe [ft]
L3 : Length of ø12.7 [1/2"] liquid pipe (m) L 3' : Length of ø12.7 [1/2"] liquid pipe [ft]
L4 : Length of ø9.52 [3/8"] liquid pipe (m) L 4' : Length of ø9.52 [3/8"] liquid pipe [ft]
L5 : Length of ø6.35 [1/4"] liquid pipe (m) L 5' : Length of ø6.35 [1/4"] liquid pipe[ft]
α, α' : Refer to the table below.
Total capacity of
α(kg) α'(oz)
connected indoor units
- 80 2.0 71
81 - 160 2.5 89
161 - 330 3.0 106
331 - 390 3.5 124
391 - 480 4.5 159
481 - 630 5.0 177
631 - 710 6.0 212
711 - 800 8.0 283
801 - 890 9.0 318
891 - 1070 10.0 353
1071 - 1250 12.0 424
1251 - 14.0 494
Round up the calculation result to the nearest 0.1kg. (Example: 18.04kg to 18.1kg)
Round up the calculation result in increments of 4oz (0.1kg) or round it up to the nearest 1oz.
(Example: 178.21oz to 179oz)
HWE0609A - 117 - GB
[ VIII Test Run Mode ]
9.52 9.52
(3 m) (1 m)
9.52 (10 m)
15.88 (10 m)
Liquid
×
separator 9.52 9.52 9.52 9.52 6.35
(10 m) (20 m) (10 m) (10 m) (10 m)
15.88 (30 m)
250 125 80 63 20
model model model model model
[3/8"] [3/8"]
[9 ft] [3 ft]
[3/8"][32 ft]
Liquid
×
separator
[3/8"] [3/8"] [3/8"] [3/8"] [1/4"]
[32 ft] [65 ft] [32 ft] [32 ft] [32 ft]
[3/4"][98 ft]
250 125 80 63 20
model model model model model
CAUTION
Charge liquid refrigerant (as opposed to gaseous refrigerant) into the system.
If gaseous refrigerant is charged into the system, the composition of the refrigerant in the cylinder will change and may
result in performance loss.
HWE0609A - 118 - GB
[ VIII Test Run Mode ]
When the function switch (SW4-3) on the main board on the outdoor unit (OC only) is turned to ON, the unit goes into the
refrigerant amount adjust mode, and the following sequence is followed.
SW4-3 on the OS is invalid, and the unit will not go into the refrigerant amount adjust mode.
Operation
When the unit is in the refrigerant amount adjust mode, the LEV on the indoor unit does not open as fully as it nor-
mally does during cooling operation to secure subcooling.
1) Adjust the refrigerant amount based on the values of TH4, TH3, TH6, and Tc, following the flowchart below. Check the TH4,
TH3, TH6, and Tc values on the OC, OS1, and OS2 by following the flowchart. The TH4, TH3, TH6, and Tc values can be
displayed by setting the self-diagnosis switch (SW1) on the main board on the OC, OS1, and OS2.
2) There may be cases when the refrigerant amount may seem adequate for a short while after starting the unit in the refrigerant
amount adjust mode but turn out to be inadequate later on (when the refrigerant system stabilizes).
When the amount of refrigerant is truly adequate.
TH3-TH6 on the indoor unit is 5°C [9°F] or above and SH on the indoor unit is between 5 and 15°C [9 and 27°F].
The refrigerant amount may seem adequate at the moment, but may turn out to be inadequate later on.
TH3-TH6 on the indoor unit is 5°C [9°F] or less and SH on the indoor unit is 5°C [9°F] or less.
Wait until the TH3-TH6 reaches 5°C [9°F] or above and the SH of the indoor unit is between 5 and 15°C [9 and 27°F] to
determine that the refrigerant amount is adequate.
3) High pressure must be at least 2.0MPa[290psi] to enable a proper adjustment of refrigerant amount to be made.
4) Refrigerant amount adjust mode automatically ends 90 minutes after beginning. When this happens, by turning off the SW4-
3 and turning them back on, the unit will go back into the refrigerant amount adjust mode.
HWE0609A - 119 - GB
[ VIII Test Run Mode ]
Start
Turn on SW4-3 on the OC. YES
NO
Put all indoor units in the test run mode *Refer to the previous page for *Notes 1-4 in the chart.
and run the units in cooling mode.
Is the TH4 value of the OC, OS1, NO Gradually add refrigerant from
OS2 at or below 100°C [212°F]? the service port on the low-
Note 1 pressure side.
YES
YES
Adjustment complete
Turn off SW4-3 on the OC.
Note 4
CAUTION
Do not release the extracted refrigerant into the air.
CAUTION
Charge liquid refrigerant (as opposed to gaseous refrigerant) into the system.
If gaseous refrigerant is charged into the system, the composition of the refrigerant in the cylinder will change and may
result in performance loss.
HWE0609A - 120 - GB
[ VIII Test Run Mode ]
Remote controller
Symptoms Cause
display
The indoor unit does not start "Cooling (heating)" The unit cannot perform a heating (cooling) operation when other indoor
after starting cooling (heating) icon blinks on the units are performing a cooling (heating) operation.
operation. display.
The auto vane adjusts its posi- After an hour of cooling operation with the auto vane in the vertical posi-
tion by itself. tion, the vane may automatically move into the horizontal position.
Normal display Louver blades will automatically move into the horizontal position while
the unit is in the defrost mode, pre-heating stand-by mode, or when the
thermostat triggers unit off.
The fan stops during heating The fan remains stopped during defrost operation.
Defrost
operation.
The fan keeps running after When the auxiliary heater is turned on, the fan operates for one minute
Unlit
the unit has stopped. after stopping to dissipate heat.
The fan speed does not reach The fan operates at extra low speed for 5 minutes after it is turned on or
the set speed when operation until the pipe temperature reaches 35°C[95°F], then it operates at low
STAND BY
switch is turned on. speed for 2 minutes, and finally it operates at the set speed.
(Pre-heating stand-by)
When the main power is The system is starting up. Wait until the blinking display of "HO" or
turned on, the display shown "HO" or "PLEASE "PLEASE WAIT" go off.
on the right appears on the in- WAIT" icons blink
door unit remote controller for on the display.
5 minutes.
The drain pump keeps run- The drain pump stays in operation for three minutes after the unit in the
ning after the unit has Unlit cooling mode is stopped.
stopped.
The drain pump is running When drain water is detected, the drain pump goes into operation even
while the unit is stopped. while the unit is stopped.
Indoor unit and BC controller This noise is made when the refrigerant circuit is reversed and is normal.
make noise during cooling/ Normal display
heating changeover.
Sound of the refrigerant flow is This is caused by the transient instability of the refrigerant flow and is nor-
heard from the indoor unit im- mal.
Normal display
mediately after starting opera-
tion.
Warm air sometimes comes This is due to the fact that the LEVs on some of the indoor units are kept
out of the indoor units that are slightly open to prevent the refrigerant in the indoor units that are not op-
Normal display
not in the heating mode. erating in the heating mode from liquefying and accumulating in the com-
pressor. It is part of a normal operation.
HWE0609A - 121 - GB
[ VIII Test Run Mode ]
HWE0609A - 122 - GB
[ VIII Test Run Mode ]
HWE0609A - 123 - GB
[ VIII Test Run Mode ]
HWE0609A - 124 - GB
[ VIII Test Run Mode ]
HWE0609A - 125 - GB
[ VIII Test Run Mode ]
HWE0609A - 126 - GB
[ VIII Test Run Mode ]
HWE0609A - 127 - GB
[ VIII Test Run Mode ]
2. 2-unit combination
(1) Cooling operation
HWE0609A - 128 - GB
[ VIII Test Run Mode ]
HWE0609A - 129 - GB
[ VIII Test Run Mode ]
HWE0609A - 130 - GB
[ VIII Test Run Mode ]
HWE0609A - 131 - GB
[ VIII Test Run Mode ]
HWE0609A - 132 - GB
[ VIII Test Run Mode ]
HWE0609A - 133 - GB
[ VIII Test Run Mode ]
HWE0609A - 134 - GB
[ VIII Test Run Mode ]
HWE0609A - 135 - GB
[ VIII Test Run Mode ]
HWE0609A - 136 - GB
[ VIII Test Run Mode ]
HWE0609A - 137 - GB
[ VIII Test Run Mode ]
HWE0609A - 138 - GB
[ VIII Test Run Mode ]
HWE0609A - 139 - GB
[ VIII Test Run Mode ]
HWE0609A - 140 - GB
[ VIII Test Run Mode ]
HWE0609A - 141 - GB
[ VIII Test Run Mode ]
HWE0609A - 142 - GB
[ VIII Test Run Mode ]
HWE0609A - 143 - GB
[ VIII Test Run Mode ]
HWE0609A - 144 - GB
[ VIII Test Run Mode ]
HWE0609A - 145 - GB
[ VIII Test Run Mode ]
3. 3-unit combination
(1) Cooling operation
HWE0609A - 146 - GB
[ VIII Test Run Mode ]
HWE0609A - 147 - GB
[ VIII Test Run Mode ]
HWE0609A - 148 - GB
[ VIII Test Run Mode ]
HWE0609A - 149 - GB
[ VIII Test Run Mode ]
HWE0609A - 150 - GB
[ VIII Test Run Mode ]
HWE0609A - 151 - GB
[ VIII Test Run Mode ]
HWE0609A - 152 - GB
[ VIII Test Run Mode ]
HWE0609A - 153 - GB
[ VIII Test Run Mode ]
HWE0609A - 154 - GB
[ VIII Test Run Mode ]
HWE0609A - 155 - GB
[ VIII Test Run Mode ]
HWE0609A - 156 - GB
[ VIII Test Run Mode ]
HWE0609A - 157 - GB
[ VIII Test Run Mode ]
HWE0609A - 158 - GB
[ VIII Test Run Mode ]
HWE0609A - 159 - GB
- 160 -
IX Troubleshooting
HWE0609A - 161 - GB
- 162 -
[ IX Troubleshooting ]
IX Troubleshooting
Searched unit
Error
Remote controller
Prelimi-
(prelim-
Error nary
Outdoor unit
inary) Error code definition Notes
LOSSNAY
Indoor unit
Code error
detail
code
code
01
4300
0403 05 Serial communication error O
4305
(Note)
0900 - - Test run O
1102 1202 - Discharge temperature fault O
1301 - - Low pressure fault O
1302 1402 - High pressure fault O
1500 1600 - Refrigerant overcharge O
- 1605 - Preliminary suction pressure fault O
2500 - - Drain sensor submergence O
2502 - - Drain pump fault O
2503 - - Drain sensor (Thd) fault O O
2600 - - Water leakage O
2601 - - Water supply cutoff O
4102 4152 - Open phase O
4106 - - Transmission power supply fault O
4115 - - Power supply signal sync error O
4116 - - RPM error/Motor error O O
[108] Abnormal bus voltage drop O
4220 4320 [109] Abnormal bus voltage rise O
4225 4325
(Note) (Note) [110] VDC error O
[111] Logic error O
4230 4330 - Heatsink overheat protection O
4240 4340 - Overload protection O
[101] IPM error O
[102] ACCT overcurrent (Hardware detection) O
[103] DCCT overcurrent (Hardware detection) O
4250 4350
4255 4355 [104] Short-circuited IPM/Ground fault O
(Note) (Note)
[105] Overcurrent error due to short-circuited motor O
[106] Instantaneous overcurrent O
[107] Overcurrent O
4260 - - Heatsink overheat protection at startup O
Return air temperature
O
Temperature sensor (TH21)
5101 1202 -
fault OA processing unit inlet
O
temperature (TH4)
HWE0609A - 163 - GB
[ IX Troubleshooting ]
Searched unit
Error
Remote controller
Prelimi-
(prelim-
Error nary
Outdoor unit
inary) Error code definition Notes
LOSSNAY
Indoor unit
Code error
detail
code
code
HWE0609A - 164 - GB
[ IX Troubleshooting ]
Searched unit
Error
Remote controller
Prelimi-
(prelim-
Error nary
Outdoor unit
inary) Error code definition Notes
LOSSNAY
Indoor unit
Code error
detail
code
code
The last digit in the check error codes in the 4000's and 5000's and two-digit detail codes indicate if the codes apply to com-
pressor inverter on fan inverter.
Example
Code 4225 (detail code 108): Bus voltage drop in the fan inverter system
Code 4230 : Heatsink overheat protection in the compressor inverter system
HWE0609A - 165 - GB
[ IX Troubleshooting ]
Refer to section - 6 - "Inverter" under part [4] "Trouble shooting principal parts" for error codes related to the inverter.
HWE0609A - 166 - GB
[ IX Troubleshooting ]
HWE0609A - 167 - GB
[ IX Troubleshooting ]
HWE0609A - 168 - GB
[ IX Troubleshooting ]
HWE0609A - 169 - GB
[ IX Troubleshooting ]
HWE0609A - 170 - GB
[ IX Troubleshooting ]
ON
Drain pump
output OFF
ON
Float switch
OFF 15 15 15 15 15
input seconds seconds seconds seconds seconds
HWE0609A - 171 - GB
[ IX Troubleshooting ]
HWE0609A - 172 - GB
[ IX Troubleshooting ]
HWE0609A - 173 - GB
[ IX Troubleshooting ]
HWE0609A - 174 - GB
[ IX Troubleshooting ]
HWE0609A - 175 - GB
[ IX Troubleshooting ]
HWE0609A - 176 - GB
[ IX Troubleshooting ]
HWE0609A - 177 - GB
[ IX Troubleshooting ]
HWE0609A - 178 - GB
[ IX Troubleshooting ]
HWE0609A - 179 - GB
[ IX Troubleshooting ]
HWE0609A - 180 - GB
[ IX Troubleshooting ]
Refer to section - 6 - "Inverter" under part [4] "Trouble shooting principal parts" for error codes related to the inverter.
HWE0609A - 181 - GB
[ IX Troubleshooting ]
Refer to section - 6 - "Inverter" under part [4] "Trouble shooting principal parts" for error codes related to the inverter.
HWE0609A - 182 - GB
[ IX Troubleshooting ]
Refer to section - 6 - "Inverter" under part [4] "Trouble shooting principal parts" for error codes related to the inverter.
HWE0609A - 183 - GB
[ IX Troubleshooting ]
HWE0609A - 184 - GB
[ IX Troubleshooting ]
<Reference>
Short detection Open detection
TH2 70 C [158 F ] and above (0.4 k ) -40 C [ -40 F ] and below (130 k )
TH3 110 C [230 F ] and above (0.4 k ) -40 C [ -40 F ] and below (130 k )
TH4 240 C [464 F ] and above (0.57 k ) 0 C [ 32 F ] and below (698 k )
TH5 70 C [158 F ] and above (0.4 k ) -40 C [ -40 F ] and below (130 k )
TH6 70 C [158 F ] and above (1.14 k ) -40 C [ -40 F ] and below (130 k )
TH7 110 C [230 F ] and above (0.4 k ) -40 C [ -40 F ] and below (130 k )
HWE0609A - 185 - GB
[ IX Troubleshooting ]
Refer to section - 6 -"Inverter" under part [4] "Trouble shootiong principal parts" for error codes related to the inverter.
HWE0609A - 186 - GB
[ IX Troubleshooting ]
HWE0609A - 187 - GB
[ IX Troubleshooting ]
HWE0609A - 188 - GB
[ IX Troubleshooting ]
2. Transmission error
HWE0609A - 189 - GB
[ IX Troubleshooting ]
Is the transmission line work YES Turn off the power source of outdoor/indoor
performed while the power is on? units, and turn them on again.
NO
NO
188 / 253V? Faulty power source work
YES
Check the transmission line work is performed
and the shielded wire is treated properly.
Confirm that the power supply Confirm that the power supply
connector on the outdoor connector on the outdoor
unit is not plugged into CN40. unit is not plugged into CN40.
YES Is the male power supply connector Is the male power supply connector
connected to the female power supply NO
switch connector (CN40) on only one connected to the female power supply
of the outdoor unit? switch connector (CN40) ?
NO YES
Tightly reconnect the male power Disconnect the male
supply connector to the female power supply on
power supply switch connector (CN40). CN40 and connect it to CN41
HWE0609A - 190 - GB
[ IX Troubleshooting ]
HWE0609A - 191 - GB
[ IX Troubleshooting ]
Error
Error definition and error detection method
Code
6607 No ACK error The error is detected when no acknowledgement (ACK signal) is received after the transmis-
sion. (eg. When the data is transmitted six times in a row with 30 seconds interval, the error
is detected on the transmission side.)
Note: The address/attribute appeared on the display on the remote controller indicates
the controller which did not provide the response (ACK).
Error
source Error display Detection method Cause Check method and remedy
address
Outdoor M-NET re- No acknowledge- (1) Contact failure of transmission Turn off the power source of the
unit (OC) mote controller ment (ACK) at IC line of OC or IC outdoor unit, and turn it on
(RC) transmission to again.
MA remote OC (2) Decrease of transmission line If the error is accidental, it will
controller (MA) voltage/signal by exceeding run normally. If not, check the
acceptable range of transmis- causes (1) - (4).
sion wiring.
Farthest:
200 m [656ft] or less
Remote controller wiring:
10m [32ft] or less
(3) Erroneous sizing of transmis-
sion line (Not within the range
below). Wire diameter:
1.25mm2 [AWG16] or more
(4) Indoor unit control board fail-
ure
Indoor M-NET re- No acknowledge- (1) When IC unit address is Turn off the outdoor/indoor units
unit (IC) mote controller ment (ACK) at changed or modified during for 5 or more minutes, and turn
(RC) RC transmission operation. them on again.
MA remote to IC If the error is accidental, they
controller (MA) (2) Faulty or disconnected IC will run normally.
transmission wiring If not, check the causes (1) - (5).
(3) Disconnected IC connector
(CN2M)
(4) Indoor unit controller failure
(5) M-NET remote controller fail-
ure
LOSS- M-NET re- No acknowledge- (1) The power source of LOSS- Turn off the power source of
NAY (LC) mote controller ment (ACK) at IC NAY has been shut off. LOSSNAY and turn it on again.
(RC) transmission to If the error is accidental, it will
MA remote LC (2) When the address of LOSS- run normally.
controller (MA) NAY is changed in the middle If not, check the causes (1) - (5).
of the operation
(3) Faulty or disconnected trans-
mission wiring of LOSSNAY
(4) Disconnected connector
(CN1) on LOSSNAY
(5) Controller failure of LOSSNAY
M-NET re- M-NET re- No acknowledge- (1) Faulty transmission wiring at Turn off the power source of the
mote con- mote controller ment (ACK) at IC IC unit side. outdoor unit for 5 minutes or
troller (RC) transmission to more, and turn it on again.
(RC) MA remote RC (2) Faulty wiring of the transmis- If the error is accidental, it will
controller (MA) sion line for M-NET remote run normally.
controller If not, check the causes (1) - (4).
(3) When the address of M-NET
remote controller is changed
in the middle of the operation
(4) M-NET remote controller fail-
ure
HWE0609A - 192 - GB
[ IX Troubleshooting ]
Error
Error definition and error detection method
Code
6607 No ACK error The error is detected when no acknowledgement (ACK signal) is received after the transmis-
(Contin- sion. (eg. When the data is transmitted six times in a row with 30 seconds interval, the error
ued) is detected on the transmission side.)
Note: The address/attribute appeared on the display on the remote controller indicates
the controller which did not provide the response (ACK).
Error
Detection
source Error display Cause Check method and remedy
method
address
Outdoor M-NET re- No acknowl- Same cause as that for system Same remedy as that for sys-
unit mote controller edgement with one outdoor unit tem with one outdoor unit
(OC) (RC) (ACK) at IC
MA remote transmission to
controller (MA) OC
Indoor M-NET re- No acknowl- (1) Same causes as (1) - (5) for sys- 1) Turn off the power sources of
unit mote controller edgement tem with one outdoor unit the outdoor and indoor units for
(IC) (RC) (ACK) at RC 5 or more minutes, and turn
MA remote transmission to them on again. If the error is ac-
controller (MA) IC cidental, the will run normally.If
not, check the cause 2).
(2) Disconnection or short circuit of 2) Check the causes of (1) - (5). If
the transmission line for the out- the cause is found, correct it. If
door unit on the terminal block no cause is found, check 3).
for centralized control line con-
nection (TB7)
(3) When multiple outdoor units are 3) Check the LED displays for
connected and the power troubleshooting on other re-
source of one of the outdoor mote controllers whether an er-
units has been shut off. ror occurs.
(4) The male power supply connec- If an error is found,
tor of the outdoor unit is not con- -> If an error is found, check the
nected to the female power check code definition, and cor-
supply switch connector (CN40). rect the error.
If no error is found,
(5) The male power supply connec- -> Indoor unit board failure
tors on 2 or more outdoor units
are connected to the female
power supply switch connector
(CN40) for centralized control.
If an error occurs, after the unit
runs normally once, the follow-
ing causes may be considered.
Total capacity error (7100)
Capacity code error (7101)
Error in the number of con-
nected units (7102)
Address setting error
(7105)
HWE0609A - 193 - GB
[ IX Troubleshooting ]
Error
Error definition and error detection method
Code
6607 No ACK error The error is detected when no acknowledgement (ACK signal) is received after the transmis-
(Contin- sion. (eg. When the data is transmitted six times in a row with 30 seconds interval, the error
ued) is detected on the transmission side.)
Note: The address/attribute appeared on the display on the remote controller indicates
the controller which did not provide the response (ACK).
Error
Detection
source Error display Cause Check method and remedy
method
address
LOSS- M-NET re- No acknowl- (1) Factors (1) through (5) in the 1) Turn off the power source of
NAY mote controller edgement "Factors in system with one out- LOSSNAY for 5 or more min-
(LC) (RC) (ACK) at IC door unit" (When performing an utes, and turn it on again. If the
MA remote transmission to interlocked operation of the error is accidental, it will run
controller (MA) LC LOSSNAY unit and the indoor normally.If not, check the
units that are connected to dif- cause 2).
ferent outdoor units.)
(2) Disconnection or short circuit of 2) Check the causes of (1) - (5). If
the transmission line for the out- the cause is found, correct it. If
door unit on the terminal block no cause is found, check 3).
for centralized control line con-
nection (TB7)
(3) When multiple outdoor units are 3) Same cause as that for indoor
connected and the power unit described in 3)
source of one of the outdoor
units has been shut off.
(4) The male power supply connec-
tor of the outdoor unit is not con-
nected to the female power
supply switch connector (CN40).
(5) The male power supply connec-
tors on 2 or more outdoor units
are connected to the female
power supply switch connector
(CN40) for centralized control.
If an error occurs, after the unit
runs normally once, the follow-
ing causes may be considered.
Total capacity error (7100)
Capacity code error (7101)
Error in the number of con-
nected units (7102)
Address setting error
(7105)
HWE0609A - 194 - GB
[ IX Troubleshooting ]
Error
Error definition and error detection method
Code
6607 No ACK error The error is detected when no acknowledgement (ACK signal) is received after the transmis-
(Contin- sion. (eg. When the data is transmitted six times in a row with 30 seconds interval, the error
ued) is detected on the transmission side.)
Note: The address/attribute appeared on the display on the remote controller indicates
the controller which did not provide the response (ACK).
Error
Detection
source Error display Cause Check method and remedy
method
address
M-NET re- M-NET re- No acknowl- (1) Same causes as (1) - (4) for sys- 1) Turn off the power source of
mote con- mote controller edgement tem with one outdoor unit LOSSNAY for 5 or more min-
troller (RC) (ACK) at IC utes, and turn it on again. If the
(RC) MA remote transmission to error is accidental, it will run
controller (MA) RC normally.If not, check the cause
2).
(2) Disconnection or short circuit of 2) Check the causes of (1) - (5). If
the transmission line for the out- the cause is found, correct it. If
door unit on the terminal block no cause is found, check 3).
for centralized control line con-
nection (TB7)
(3) When multiple outdoor units are 3) Same cause as that for indoor
connected and the power unit described in 3)
source of one of the outdoor
units has been shut off.
(4) The male power supply connec-
tor of the outdoor unit is not con-
nected to the female power
supply switch connector (CN40).
(5) The male power supply connec-
tors on 2 or more outdoor units
are connected to the female
power supply switch connector
(CN40) for centralized control.
If the problem recurs after nor-
mal operation is restored, the
problem is caused by one of the
following factors:
Total capacity error (7100)
Capacity code setting error
(7101)
Error in the number of con-
nected units (7102)
Address setting error
(7105)
HWE0609A - 195 - GB
[ IX Troubleshooting ]
Error
Error definition and error detection method
Code
6607 No ACK error The error is detected when no acknowledgement (ACK signal) is received after the trans-
(Contin- mission. (eg. When the data is transmitted six times in a row with 30 seconds interval, the
ued) error is detected on the transmission side.)
Note: The address/attribute appeared on the display on the remote controller indi-
cates the controller which did not provide the response (ACK).
Error
Detec-
source
Error display tion Cause Check method and remedy
ad-
method
dress
Out- M-NET re- No ac- Same cause as that for system with one out- Same remedy as that for
door mote control- knowl- door unit system with one outdoor
unit ler (RC) edgeme unit
(OC) System con- nt (ACK)
troller (SC) at IC
MA remote transmis-
controller sion to
(MA) OC
Indoor M-NET re- No ac- Same as grouping of units in a system with mul- Same remedy as that for
unit mote control- knowl- tiple outdoor units grouping of units in a
(IC) ler (RC) edgeme system with multiple out-
MA remote nt (ACK) door units
controller at RC
(MA) transmis-
sion to IC
System con- No ac- 1. Error occurrence on some IC Same remedy as that for
troller (SC) knowl- system with one outdoor
edgeme (1) Same cause as that for system with one out- unit
nt (ACK) door unit
at SC 2. Error occurrence on all IC in the system with 1) Check the LED display
transmis- one outdoor unit for troubleshooting on
sion to IC the outdoor unit.
(1) Total capacity error (7100) If an error is found,
check the check code
(2) Capacity code error (7101) definition, and correct
(3) Error in the number of connected units (7102) the error.
If no error is found,
(4) Address setting error (7105) check 2).
(5) Disconnection or short circuit of the transmis- 2) Check (5) - (7) on the left.
sion line for the outdoor unit on the terminal
block for centralized control line connection
(TB7)
(6) Turn off the power source of the outdoor unit
(7) Malfunction of electrical system for the outdoor
unit
3. Error occurrence on all IC Check voltage of the
transmission line for cen-
(1) Same causes as (1) - (7) described in 2. tralized control.
(2) The male power supply connectors on 2 or 20V or more: Check (1)
more outdoor units are connected to the female and (2) on the left.
power supply switch connector (CN40) for the Less than 20V: Check
transmission line for centralized control. (3) on the left.
HWE0609A - 196 - GB
[ IX Troubleshooting ]
Error
Error definition and error detection method
Code
6607 No ACK error The error is detected when no acknowledgement (ACK signal) is received after the transmis-
(Contin- sion. (eg. When the data is transmitted six times in a row with 30 seconds interval, the error
ued) is detected on the transmission side.)
Note: The address/attribute appeared on the display on the remote controller indicates
the controller which did not provide the response (ACK).
Error
Detection meth-
source Error display Cause Check method and remedy
od
address
M-NET re- M-NET re- No acknowl- Same as grouping of units in a Same remedy as that for
mote con- mote controller edgement system with multiple outdoor grouping of units in a system
troller (RC) (ACK) at IC units with multiple outdoor units
(RC) System con- transmission to
troller (SC) RC
MA remote
controller (MA)
System con- No acknowl- 1. Error occurrence on some IC Same remedy as that for sys-
troller edgement tem with one outdoor unit
(SC) (ACK) at (1) Same cause as that for system
MELANS trans- with one outdoor unit
mission to RC 2. Error occurrence on all IC in the 1) Check the LED display for
system with one outdoor unit troubleshooting on the out-
door unit.
(1) An error is found by the outdoor If an error is found, check
unit. the check code definition,
Total capacity error (7100) and correct the error.
Capacity code error (7101) If no error is found, check
Error in the number of connect- the cause 2).
ed units (7102)
Address setting error (7105)
(2) Disconnection or short circuit of 2) Check (2) - (4) on the left.
the transmission line for the
outdoor unit on the terminal
block for centralized control line
connection (TB7)
(3) Turn off the power source of the
outdoor unit
(4) Malfunction of electrical system
for the outdoor unit
3. Error occurrence on all IC Check (1) - (4) on the left.
(1) Same causes as (1) - (4) de-
scribed in 2.
(2) When the power supply unit for
transmission lines is used and
the male power supply connec-
tor is connected to the female
power supply switch connector
(CN40) for the transmission line
for centralized control
(3) Disconnection or shutdown of
the power source of the power
supply unit for transmission line
(4) System controller (MELANS)
malfunction
HWE0609A - 197 - GB
[ IX Troubleshooting ]
Error
Error definition and error detection method
Code
6607 No ACK error The error is detected when no acknowledgement (ACK signal) is received after the transmis-
(Contin- sion. (eg. When the data is transmitted six times in a row with 30 seconds interval, the error
ued) is detected on the transmission side.)
Note: The address/attribute appeared on the display on the remote controller indicates
the controller which did not provide the response (ACK).
Error
Detection
source Error display Cause Check method and remedy
method
address
System M-NET re- No acknowl- 1. Error display on some displays Check (1) - (3) on the left.
controller mote controller edgement on M-NET remote controllers
(SC) (RC) (ACK) at IC
MA remote transmission to (1) Faulty wiring of the transmis-
controller SC sion line for M-NET remote
(MA) controller
(2) Disconnection or contact fail-
ure of the transmission con-
nector for M-NET remote
controller
(3) M-NET remote controller fail-
ure
2. Error occurrence on all IC in 1) Check the LED display for trou-
the system with one outdoor bleshooting on the outdoor unit.
unit
(1) An error is found by the out- If an error is found, check the
door unit. check code definition, and
Total capacity error (7100) correct the error.
Capacity code error (7101) If no error is found, check the
Error in the number of con- cause 2)
nected units (7102)
Address setting error (7105)
(2) Disconnection or short circuit 2) Check (2) - (4) on the left.
of the transmission line for the
outdoor unit on the terminal
block for centralized control
line connection (TB7)
(3) Turn off the power source of
the outdoor unit
(4) Malfunction of electrical sys-
tem for the outdoor unit
3. Error display on all displays on Check (1) - (4) on the left
M-NET remote controllers
(1) Same causes as (1) - (4) de-
scribed in 2.
(2) When the power supply unit for
transmission lines is used and
the male power supply con-
nector is connected to the fe-
male power supply switch
connector (CN40) for the
transmission line for central-
ized control
(3) Disconnection or shutdown of
the power source of the power
supply unit for transmission
line
(4) System controller (MELANS)
malfunction
HWE0609A - 198 - GB
[ IX Troubleshooting ]
Error
Error definition and error detection method
Code
6607 No ACK error The error is detected when no acknowledgement (ACK signal) is received after the transmis-
(Contin- sion. (eg. When the data is transmitted six times in a row with 30 seconds interval, the error
ued) is detected on the transmission side.)
Note: The address/attribute appeared on the display on the remote controller indicates
the controller which did not provide the response (ACK).
Error
Detection
source Error display Cause Check method and remedy
method
address
Address - - (1) Although the address of M- Delete unnecessary information
which NET remote controller has of non-existing address which
should not been changed after the group some indoor units have.
be existed is set using M-NET remote Use either of the following two
controller, the indoor unit is methods for deletion.
keeping the memory of the pre-
vious address. The same
symptom will appear for the
registration with SC.
(2) Although the address of LOSS- 1) Address deletion by M-NET re-
NAY has been changed after mote controller
the interlock registration of Delete unnecessary address in-
LOSSNAY is made using M- formation using the manual set-
NET remote controller, the in- ting function of M-NET remote
door unit is keeping the memo- controller. Refer to this service
ry of the previous address. handbook "4. [2]. Group set-
tings and interlock settings via
the ME remote controller 1. (3)
Address deletion".
2) Deletion of connection informa-
tion of the outdoor unit by the
deleting switch
Note that this switch deletes
all the group information set
via M-NET remote controller
and all the interlock informa-
tion of LOSSNAY and the in-
door unit.
Turn off the power source of
the outdoor unit, and wait for
5 minutes.
Turn on the dip switch (SW2-
2) on the outdoor unit control
board.
Turn on the power source of
the outdoor unit, and wait for
5 minutes.
Turn off the power source of
the outdoor unit, and wait for
5 minutes.
Turn off the dip switch (SW2-
2) on the outdoor unit control
board.
Turn on the power source of
the outdoor unit.
HWE0609A - 199 - GB
[ IX Troubleshooting ]
HWE0609A - 200 - GB
[ IX Troubleshooting ]
HWE0609A - 201 - GB
[ IX Troubleshooting ]
3. System error
(2) The model selection switches Check the setting for the
(SW5-1 - 5-4) on the outdoor model selection switch
unit are set incorrectly. on the outdoor unit
(Dipswitches SW5-1 - 5-4
on the outdoor unit con-
Model SW5 trol board).
1 2 3 4
P200 model OFF ON OFF OFF
P250 model ON ON OFF OFF
P300 model OFF OFF ON OFF
P350 model OFF ON ON OFF
P400 model ON ON ON OFF
P450 model OFF OFF OFF ON
(3) The outdoor unit and the auxil- Confirm that the TB3 on
iary unit (OS) that is connected the OC and OS are prop-
to the same system are not erly connected.
properly connected.
HWE0609A - 202 - GB
[ IX Troubleshooting ]
HWE0609A - 203 - GB
[ IX Troubleshooting ]
HWE0609A - 204 - GB
[ IX Troubleshooting ]
7110 Outdoor Connection informa- (1) Power to the transmission 1) Confirm that the power to
unit tion signal transmis- booster is cut off. the transmission booster
sion/reception error is not cut off by the boost-
er being connected to the
The given indoor unit is switch on the indoor unit.
inoperable because it is (The unit will not function
not properly connected properly unless the trans-
to the outdoor unit in the mission booster is turned
same system. on.)
(2) Power resetting of the transmis- ->Reset the power to the
sion booster and outdoor unit. outdoor unit.
(3) Wiring failure between OC and 2) Confirm that the TB3 on
OS the OC and OS are prop-
erly connected.
(4) Broken wire between OC and 3) Check the model selec-
OS. tion switch on the outdoor
unit (Dipswitch SW5-7 on
(5) The model selection switch the control board.).
(SW5-7) on the outdoor unit is
set to OFF. (Normally set to
ON)
7111 Indoor Remote controller The remote controller without Replace the remote con-
unit sensor fault the temperature sensor (the troller with the one with
OA pro- wireless remote controller or built-in temperature sen-
cessing This error occurs when the M-NET compact remote sor.
unit the temperature data is controller (mounted type)) is
not sent although the re- used and the remote controller
mote controller sensor is sensor for the indoor unit is
specified. specified. (SW1-1 is ON.)
7113 Outdoor Function setting error (1) Wiring failure 1) Control board connector
unit Resistor connection er- Check the CNTYP4,5
ror connector connection.
INV board connector
Check the CNTYP con-
nector connection(P300 -
P450 models only)
(2) Disconnected connector, short 2) Check the compatibility
circuit, contact failure of the circuit board, and
replace it with a correct
one if necessary.
(3) Incompatibility between the 3) Check the model selec-
control board and INV board tion switch on the outdoor
(Replacement of the circuit unit (Dipswitch SW5-7 on
board with the wrong one) the control board.).
7117 Outdoor Model setting error (1) Wiring failure 1) Control board connector
unit Check the CNTYP4,5
(2) Disconnected connector, short connector connection.
circuit, contact failure INV board connection
Check the CNTYP con-
nector connection (P300
- P450 models only)
HWE0609A - 205 - GB
[ IX Troubleshooting ]
HWE0609A - 206 - GB
[ IX Troubleshooting ]
4. Troubleshooting according to the remote controller malfunction or the external input error
(1) In the case of MA remote controller
HWE0609A - 207 - GB
[ IX Troubleshooting ]
HWE0609A - 208 - GB
[ IX Troubleshooting ]
Phenomena Cause
3 "HO" or "PLEASE WAIT" dis- 1. The power for the M-NET transmission line is not supplied from the outdoor
play on the remote controller unit.
does not disappear, and no
operation is performed even if 2. Short-circuited transmission line
the button is pressed. ("HO" or 3. Incorrect wiring of the M-NET transmission line on the outdoor unit.
"PLEASE WAIT" display will
normally turn off 5 minutes lat- Disconnected wire for the MA remote controller or disconnected line to the
er after the power on.) terminal block.
The indoor transmission line is connected incorrectly to the transmission
terminal block for centralized controller (TB7).
The male power supply connectors on the multiple outdoor units are con-
nected to the female power supply switch connector (CN40).
In the system to which the power supply unit for transmission lines is con-
nected, the male power supply connector is connected to the female pow-
er supply switch connector (CN40) on the outdoor unit
4. Disconnected M-NET transmission line on the indoor unit.
5. Disconnected wire between the terminal block for M-NET line (TB5) of the
indoor unit and the indoor unit board (CN2M) or disconnected connector.
6. Incorrect wiring for the MA remote controller
Short-circuited wire for the MA remote controller
Disconnected wire for the MA remote controller (No.2) and disconnected
line to the terminal block.
Reversed daisy-chain connection between groups
Incorrect wiring for the MA remote controller to the terminal block for
transmission line connection (TB5) on the indoor unit
The M-NET transmission line is connected incorrectly to the terminal
block (TB13) for the MA remote controller.
7. The sub/main setting of the MA remote controller is set to sub.
8. 2 or more main MA remote controllers are connected.
9. Indoor unit board failure (MA remote controller communication circuit)
10 Remote controller failure
11 Outdoor unit failure (Refer to I9 [7] Troubleshooting Using the Outdoor Unit
LED Error Display.)
When 2. and 3. apply, check code 7102 will be displayed on the self-
diagnosis LED.
Check method and remedy
YES
Correct Error found?
the error.
YES Replace the M-NET remote
Error found? controller with the MA NO
remote controller
NO Indoor unit board or
MA remote controller failure
Check (1).
Correct
Refer to [4] - 7 - (2) "Outdoor unit transmission power source the error.
circuit failure judgment" for the check method.
HWE0609A - 209 - GB
After turning the power on, check whether "HO"/
"PLEASE WAIT" is displayed on the remote controller.
HWE0609A
YES
Blinking?
NO
Flow chart
When all wires used for Normal External thermo YES Although No.1 refrigerant circuit
input setting? To 4.(1) 2 YES
grouping are disconnected, is at YES (Operate the unit with No.1 Refrigerant circuit check is normal, No.2 or No.3
NO (SW3-3=ON)
least one of the LED2 on the external control equipment) refrigerant circuit remain stopped.
grouped indoor units lit? NO Normal
YES To 4.(1) 2
Replace the MA remote controller. Does an error occur when (Is the thermo OFF
Check the malfunctioning
the power is reset? signal input?) NO
NO refrigerant circuit.
NO Replace the remote controller Is the compulsory Check for the M-NET
YES
or the indoor control board. thermo OFF (SWA) transmission line.
Is there an indoor unit on YES switch set to "2" or "3"?
which LED2 is turned off? Keep the operation.
Set the SWA to "1".
Running group operation with YES
NO To 4.(1) 1 NO
the MA remote controller?
*After correcting the error, daisy-chain
the wire for the MA remote controller again. Replace the indoor unit control board.
Does the unit work properly YES NO
when the wire for the MA Is the unit grouped YES
remote controller is with the equipment package
daisy-chained again? YES indoor unit?
Does an error occur when
NO the power is reset?
Does the MA remote controller YES NO
work properly when it is connected NO No fault with the equipment YES
to the specified indoor unit? Replace the remote controller package indoor unit?
After more than 20 seconds since Check whether the screw
- 210 -
YES or the indoor control board.
turning the power on, is LED2 check on the wire is not loose. Keep the operation.
NO
of the indoor control board still NO Check the equipment
displayed? Replace the MA package indoor unit.
remote controller.
NO Replace the indoor unit control Check that no error occurs in other indoor units.
board where an error occurs.
When no error occurs
GB
[ IX Troubleshooting ]
YES
Melted? Check 200V circuit for
short circuit and ground fault
NO
Check the connection
of the connector.
YES
Disconnected? Connector contact failure
NO
Check the resistance value *1 *1
of the transformer
Check the cause of the
NO disconnected transformer.
Within specification?
Ground fault on the circuit board
Ground fault of the sensor and the LEV
YES
Check for the change of LED Check self-diagnosis function
of outdoor unit
display by operating dip
switch SW1 for self-diagnosis.
NO
Changed?
Check self-diagnosis function of
YES outdoor unit after the power on.
NO
Changed?
YES Indoor unit control
Accidental board failure
error
HWE0609A - 211 - GB
[ IX Troubleshooting ]
Phenomena Cause
3 "HO" display on Without using MELANS
the remote con-
troller does not 1. Outdoor unit address is set to "00"
disappear, and 2. A wrong address is set.
no operation is
performed even if A wrong address is set to the indoor unit to be coupled with the remote controller.
the button is 100 must be subtracted from the address of the M-NET remote controller.
pressed. A wrong address is set to the M-NET remote controller.
(100 must be added to the address of the indoor unit.)
3. Faulty wiring of the terminal block for transmission line (TB5) of the indoor unit in the same
group with the remote controller.
4. The centralized control switch (SW2-1) on the outdoor unit is set to ON.
5. Disconnection or faulty wiring of indoor unit transmission line.
6. Disconnection between the terminal block for M-NET line connection (TB5) of the indoor
unit and the male connector (CN2M)
7. The male power supply connectors on 2 or more outdoor units are connected to the female
power supply switch connector (CN40) for the transmission line for centralized control.
8. Outdoor unit control board failure
9. Indoor unit board failure
10. Remote controller failure
Interlocking control with MELANS
11. No group registration is made using MELANS. (The indoor unit and the M-NET remote con-
troller are not grouped.)
12. Disconnected transmission line for centralized control (TB7) of the outdoor unit
13. The male power supply connector is connected to CN40 on more than one outdoor unit, or
the connector is connected to CN40 on the outdoor unit in the system to which a power sup-
ply unit for transmission line is connected.
3 Check method and remedy
Without using MELANS
Correct
the error.
*1. When the indoor unit address is set to 1 - 50, the address will be forcibly set to 100.
Using MELANS
When MELANS is used, "HO" display on the remote controller will disappear when the indoor unit and the local re-
mote controller (M-NET remote controller) are grouped.
If "HO" does not disappear after the registration, check the 11. - 13.
HWE0609A - 212 - GB
[ IX Troubleshooting ]
Phenomena Cause
4 "88" appears on the re- An error occurs when the address is (1) Confirm the address of unit to be
mote controller when registered or confirmed. (common) coupled.
the address is regis-
tered or confirmed. 1. A wrong address is set to the unit to (2) Check the connection of transmis-
be coupled. sion line.
2. The transmission line of the unit to be (3) Check voltage of the terminal block
coupled is disconnected or is not for transmission line of the unit to be
connected. coupled.
3. Circuit board failure of the unit to be 1) Normal if voltage is between DC17
coupled and 30V.
4. Improper transmission line work 2) Check (4) in case other than 1).
Generates at interlocking registration (4) Check for the main power of LOSS-
between LOSSNAY and the indoor unit NAY.
5. The power of LOSSNAY is OFF.
Generates at confirmation of control- (5) Check the power supply of the out-
lers used in the system in which the in- door unit which is coupled with the
door units connected to different unit to be confirmed.
outdoor units are grouped
6. The power of the outdoor unit to be (6) Check that the transmission line for
confirmed has been cut off. centralized control (TB7) of the out-
door unit is not disconnected.
7. The transmission line for centralized (7) Check voltage of the transmission
control (TB7) is disconnected. line for centralized control.
8. When the indoor units connected to 1) Normal when voltage is between 10V
different outdoor units are grouped and 30V
without MELANS, the male power
supply connector is not connected to
the female power supply switch con-
nector (CN40) for the transmission
line for centralized control.
9. The male power supply connectors 2) Check 8 - 11 described on the left in
on 2 or more outdoor units are con- case other than 1).
nected to the female power supply
switch connector (CN40) for the
transmission line for centralized con-
trol.
10. In the system to which MELANS is
connected, the male power supply
connector is connected to the female
power supply switch connector
(CN40) for the transmission line for
centralized control.
11. Short circuit of the transmission line
for centralized control
HWE0609A - 213 - GB
[ IX Troubleshooting ]
Evaporating temperature Te
SW1
1 2 3 4 5 6 7 8 9 10
ON
HWE0609A - 214 - GB
[ IX Troubleshooting ]
HWE0609A - 215 - GB
[ IX Troubleshooting ]
Condensing temperature Tc
SW1
1 2 3 4 5 6 7 8 9 10
ON
HWE0609A - 216 - GB
[ IX Troubleshooting ]
HWE0609A - 217 - GB
[ IX Troubleshooting ]
6) Over-current break
7) Refrigerant overcharge
Note1: Frost prevention tripping only under
cooling mode may be considered in addition
to the above. (Freeze protection is detected
by one or all indoor units.)
Note2: Even the second stop is not consid-
ered as an error when some specified errors
occur. (eg. The third stop is considered as an
error when the thermistor error occurs.)
HWE0609A - 218 - GB
[ IX Troubleshooting ]
No fine noise
allowed
VHL
VBN
52 52 52 52 52
[With transmission] Logic "0" Logic "1"
[Without transmission]
HWE0609A - 219 - GB
[ IX Troubleshooting ]
2) Check the followings when the error "6607" occurs, or "HO" appears on the display on the remote controller.
HWE0609A - 220 - GB
[ IX Troubleshooting ]
TB15
A 1
B 2 A, B : No polarity
Across terminal No. 1-2
MA remote controller Indoor unit : Power supply (9V to 12VDC)
HWE0609A - 221 - GB
[ IX Troubleshooting ]
(1) While the sensor is stopped, compare the gauge pressure and the pressure displayed on self-diagnosis LED1.
1) When the gauge pressure is between 0 and 0.098MPa [14psi], internal pressure is caused due to gas leak.
2) When the pressure displayed on self-diagnosis LED1 is between 0 and 0.098MPa [14psi], the connector may be defective or
be disconnected. Check the connector and go to (4).
3) When the pressure displayed on self-diagnosis LED1 exceeds 4.15MPa [601psi], go to (3).
4) If other than 1), 2) or 3), compare the pressures while the sensor is running. Go to (2).
(2) Compare the gauge pressure and the pressure displayed on self-diagnosis LED1 while the sensor is running. (Com-
pare them by MPa [psi] unit.)
1) When the difference between both pressures is within 0.098MPa [14psi], both the high pressure sensor and the control board
are normal.
2) When the difference between both pressures exceeds 0.098MPa [14psi], the high pressure sensor has a problem. (perfor-
mance deterioration)
3) When the pressure displayed on self-diagnosis LED1 does not change, the high pressure sensor has a problem.
(3) Remove the high pressure sensor from the control board to check the pressure on the self-diagnosis LED1.
1) When the pressure displayed on self-diagnosis LED1 is between 0 and 0.098MPa [14psi], the high pressure sensor has a
problem.
2) When the pressure displayed on self-diagnosis LED1 is approximately 4.15MPa [601psi], the control board has a problem.
(4) Remove the high pressure sensor from the control board, and short-circuit between the No.2 and 3 connectors
(63HS1) to check the pressure with self-diagnosis LED1.
1) When the pressure displayed on the self-diagnosis LED1 exceeds 4.15MPa [601psi], the high pressure sensor has a problem.
2) If other than 1), the control board has a problem.
The pressure sensor on the body side is designed to connect to the connector. The connector pin number on the body side
is different from that on the control board side.
4.5 [653]
2.0 [290]
Connector
1.5 [218]
1
GND (Black) 1.0 [145]
2
Vout (White) 0.5 [73]
3 0
Vcc (DC 5 V)(Red) 0 0.5 1 1.5 2 2.5 3 3.5
Output voltage (V)
HWE0609A - 222 - GB
[ IX Troubleshooting ]
(1) While the sensor is stopped, compare the gauge pressure and the pressure displayed on self-diagnosis LED1.
1) When the gauge pressure is between 0 and 0.098MPa [14psi], internal pressure is caused due to gas leak.
2) When the pressure displayed on self-diagnosis LED1 is between 0 and 0.098MPa [14psi], the connector may be defective or
be disconnected. Check the connector and go to (4).
3) When the pressure displayed on self-diagnosis LED1 exceeds 1.7MPa [247psi], go to (3).
4) If other than 1), 2) or 3), compare the pressures while the sensor is running. Go to (2).
(2) Compare the gauge pressure and the pressure displayed on self-diagnosis LED1 while the sensor is running.(Com-
pare them by MPa [psi] unit.)
1) When the difference between both pressures is within 0.03MPa [4psi], both the low pressure sensor and the control board are
normal.
2) When the difference between both pressures exceeds 0.03MPa [4psi], the low pressure sensor has a problem. (performance
deterioration)
3) When the pressure displayed on the self-diagnosis LED1 does not change, the low pressure sensor has a problem.
(3) Remove the low pressure sensor from the control board to check the pressure with the self-diagnosis LED1 display.
1) When the pressure displayed on the self-diagnosis LED1 is between 0 and 0.098MPa [14psi], the low pressure sensor has a
problem.
2) When the pressure displayed on self-diagnosis LED1 is approximately 1.7MPa [247psi], the control board has a problem.
When the outdoor temperature is 30°C [86°F] or less, the control board has a problem.
When the outdoor temperature exceeds 30°C [86°F], go to (5).
(4) Remove the low pressure sensor from the control board, and short-circuit between the No.2 and 3 connectors
(63LS:CN202) to check the pressure with the self-diagnosis LED1.
1) When the pressure displayed on the self-diagnosis LED1 exceeds 1.7MPa [247psi], the low pressure sensor has a problem.
2) If other than 1), the control board has a problem.
(5) Remove the high pressure sensor (63HS1) from the control board, and insert it into the connector for the low pres-
sure sensor (63LS) to check the pressure with the self-diagnosis LED1.
1) When the pressure displayed on the self-diagnosis LED1 exceeds 1.7MPa [247psi], the control board has a problem.
2) If other than 1), the control board has a problem.
2. Low-pressure sensor configuration
The low pressure sensor consists of the circuit shown in the figure below. If DC5V is applied between the red and the black
wires, voltage corresponding to the pressure between the white and the black wires will be output, and the value of this voltage
will be converted by the microcomputer. The output voltage is 0.173V per 0.098MPa [14psi].
The pressure sensor on the body side is designed to connect to the connector. The connector pin number on the body side
is different from that on the control board side.
1.8 [261]
1.6 [232]
Pressure (MPa [psi])
63LS
1.4 [203]
123 Pressure 0 ~ 1.7 MPa [247psi]
Vout 0.5 ~ 3.5 V 1.2 [174]
0.173 V / 0.098 MPa [14 psi] 1.0 [145]
0.8 [116]
Connector
0.6 [87]
1 0.4 [58]
GND (Black)
2 0.2 [29]
Vout (White)
0
3 0 0.5 1 1.5 2 2.5 3 3.5
Vcc (DC 5 V)(Red)
Output voltage (V)
HWE0609A - 223 - GB
[ IX Troubleshooting ]
The circuits on some parts are closed when the relays are ON. Refer to the following instructions.
Display
SW1
LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8
Upper 21S4a CH11 SV1a
SW1
1 2 3 4 5 6 7 8 9 10
ON
Lower 21S4b SV5b
When a valve malfunctions, check if the wrong solenoid valve coil is not attached the lead wire of the coil is not disconnected, the
connector on the board is not inserted wrongly, or the wire for the connector is not disconnected.
Check the LED display and the intake and the discharge temperature for the 4-way valve to check whether the valve has no
faults and the electricity runs between where and where.Do not touch the pipe when checking the temperature, as the pipe
on the oil separator side will be hot.
Do not give an impact from outside, as the outer hull will be deformed leading to the malfunction of the inner valve.
(2) In case of 21S4b (4-way switching valve) (only for P400-P450 models)
About this 4-way valve
When not powered:
Conducts electricity between the oil separator outlet and the heat exchaner1 (the top heat exchanger) and opens and closes
the heat exchanger circuit for the heating and cooling cycles.
When powered:
The electricity runs between the heat exchanger and the accumulator, and the valve opens or closes the heat exchanger cir-
cuit when cooling or heating.
Check the LED display and the switching sound to check whether the valve has no faults, however, it may be occasionally
difficult to check by the sound, as the switching coincides with 21S4a and 21S4c. In this case, check the intake and the dis-
charge temperature for the 4-way valve to check that the electricity runs between where and where.
Do not touch the valve when checking the temperature, as it will be hot.
Do not give an impact from outside, as the outer hull will be deformed leading to the malfunction of the inner valve.
Do not give an impact from outside, as the outer hull will be deformed leading to the malfunction of the inner valve.
HWE0609A - 224 - GB
[ IX Troubleshooting ]
SW1
1 2 3 4 5 6 7 8 9 10
ON
As the revolution of the fan changes under control, at the interphase or when the indoor unit operation capacity is low, the
revolution of the fan may change.
If the fan does not move or it vibrates, Fan board problem or fan motor problem is suspected. Refer to - 6 - (2) [5] "Check the
fan motor ground fault or the winding." and - 6 - (2) [6] "Check the Fan board failure."
HWE0609A - 225 - GB
[ IX Troubleshooting ]
-5- LEV
LEV operation
LEV (Indoor unit: Linear expansion valve), LEV2a, and LEV2b (Outdoor unit: Linear expansion valve) are stepping-motor-driv-
en valves that operate by receiving the pulse signals from the indoor and outdoor unit control boards.
Intermediate connector
DC12V
LEV 2 Brown 6
Blue 5 Red 5
4 Drive circuit
Brown 4 1 Blue 4 4
M 6
Yellow 3 3 Orange 3 3
5 2
1 3 2 Yellow 2
4 2
White Red Orange
1 6 White 1 1
Note. The connector numbers on the intermediate connector and the connector on the control board differ. Check the color of the lead wire
to judge the number.
D
C *When the power is turned on, the valve closing signal of 2200 pulses
will be output from the indoor board to LEV to fix the valve position.
It must be fixed at point A.
Valve opening (refrigerant flow rate)
Valve open
A
E Fully open: 1400 pulses
B Pulses
80 - 100 pulses
HWE0609A - 226 - GB
[ IX Troubleshooting ]
DC 12V
6 Red 6
LEV
1 White 1 1
Output state Output pulses change in the following orders when the
Output
(phase) Valve is open; 1 2 3 4 5 6 7 8 1
number 1 2 3 4 5 6 7 8
Valve is closed; 8 7 6 5 4 3 2 1 8
1 ON OFF OFF OFF OFF OFF ON ON
*1. When the LEV opening angle does not change,
2 ON ON ON OFF OFF OFF OFF OFF all the output phases will be off.
*2. When the output is open phase or remains ON,
3 OFF OFF ON ON ON OFF OFF OFF
the motor cannot run smoothly, and rattles and vibrates.
4 OFF OFF OFF OFF ON ON ON OFF
*When the power is turned on, the valve closing signal of 520 pulses
B will be output from the indoor board to LEV to fix the valve position.
It must be fixed at point A.
(Pulse signal is output for approximately 17 seconds.)
Valve opening (refrigerant flow rate)
When the valve operates smoothly, there is no sound from the LEV and no
vibration occurs, but when the valve is locked, noise is generated.
Valve open
Pulses
HWE0609A - 227 - GB
[ IX Troubleshooting ]
The specifications of the outdoor unit (outdoor LEV) and the indoor unit (indoor LEV) differ.Therefore, remedies for each failure
may vary. Check the remedy specified for the appropriate LEV as indicated in the right column.
resistance : 0.25W 1k
LED : DC15V 20mA or more
When the main power is turned on, the indoor unit cir-
cuit board outputs pulse signals to the indoor unit LEV
for 10 seconds, and the outdoor unit circuit board out-
puts pulse signals to the outdoor unit LEV for 17 sec-
onds.
If any of the LED remains lit or unlit, the drive circuit is
faulty.
LEV mechanism If the LEV is locked, the drive motor runs idle, and Replace the LEV. Indoor
is locked makes a small clicking sound. Outdoor
When the valve makes a closing and opening sound,
the valve has a problem.
Disconnected or Measure resistance between the coils (red - white, red Replace the LEV coils. Indoor
short-circuited -orange, brown - yellow, brown - blue) using a tester. Outdoor
LEV motor coil They are normal if resistance is 150ohm 10%. (LEV2a,
LEV2b)
Measure resistance between the coils (red - white, red Replace the LEV coils. Outdoor
-orange, brown - yellow, brown - blue) using a tester. (LEV1)
They are normal if resistance is 46ohm 3%.
Incomple sealing When checking the refrigerant leak from the indoor If there is a large amount of Indoor
(leak from the LEV, run the target indoor unit in the fan mode, and the leakage, replace the LEV.
valve) other indoor units in the cooling mode. Then, check the
liquid temperature (TH22) with the self-diagnosis LED.
When the unit is running in the fan mode, the LEV is ful-
ly closed, and the temperature detected by the ther-
mistor is not low. If there is a leak, however, the
temperature will be low. If the temperature is extremely
low compared with the inlet temperature displayed on
the remote controller, the LEV is not properly sealed,
however, if there is a little leak, it is not necessary to re-
place the LEV when there are no effects to other parts.
Thermistor
(liquid piping
temperature detection)
Linear Expansion Valve
Faulty wire con- 1. Check for loose pins on the connector and check Check the continuity at the Indoor
nections in the the colors of the lead wires visually points where an error occurs. Outdoor
connector or
faulty contact 2. Disconnect the control board's connector and
conduct a continuity check using a tester.
HWE0609A - 228 - GB
[ IX Troubleshooting ]
Body
Coils
Stopper
Lead wire
Part A
Part A
HWE0609A - 229 - GB
[ IX Troubleshooting ]
-6- Inverter
Replace only the compressor if only the compressor is found to be defective. (Overcurrent will flow through the inverter if the
compressor is damaged, however, the power supply is automatically cut when overcurrent is detected, protecting the inverter
from damage.)
Replace only the fan motor if only the fan motor is found to be defective. (Overcurrent will flow through the inverter if the fan
motor is damaged, however, the power supply is automatically cut when overcurrrent is detected, protecting the inverter from
damage.)
Replace the defective components if the inverter is found to be defective.
If both the compressor and the inverter are found to be defective, replace the defective component(s) of both devices.
6) When the IPM, diode stack, or IGBT is replaced, apply a thin layer of heat radiation grease that is supplied evenly to these
parts. Wipe off any grease that may get on the wiring terminal to avoid terminal contact failure.
7) Faulty wiring to the compressor damages the compressor. Connect the wiring in the correct phase sequence.
HWE0609A - 230 - GB
[ IX Troubleshooting ]
[1] Inverter related errors Check the details of the inverter error in the error log at 10.[1] Table of
4250, 4255, 4220, 4225, 4230, 4240,4260, 5301, 0403 LED codes.
Take appropriate measures to the error code and the error details in ac-
cordance with 9. [2] Self-diagnosis on the basis of Error Display on Re-
mote Controller and Remedy for Error.
[2] Main power breaker trip <1> Check the breaker capacity.
<3> If items cause is not <1>or <2> are not the causes of the problem,
see (3)-[1].
[3] Main power earth leakage breaker trip <1> Check the earth leakage breaker capacity and the sensitivity cur-
rent.
<2> Meg failure for electrical system other than the inverter
[4] Only the compressor does not operate. Check the inverter frequency on the LED monitor and proceed to (2) -
[4] if the compressor is in operation.
[5] The compressor vibrates violently at all times or makes an abnor- See (2)-[4].
mal sound.
[6] Only the fan motor does not operate. Check the inverter frequency on the LED monitor and proceed to (2)-
[6] if the fan motor is in operation.
[7] The fan motor shakes violently at all times or makes an abnormal Check the inverter frequency on the LED monitor and proceed to (2)-
sound. [6] if the fan motor is in operation.
[8] Noise is picked up by the peripheral device <1> Check that power supply wiring of the peripheral device does not
run close to the power supply wiring of the outdoor unit.
<2> Check that the inverter output wiring is not in close contact with the
power supply wiring and the transmission lines.
<3> Check that the shielded wire is used as the transmission line when
it is required, and check that the grounding work is performed prop-
erly on the shielded wire.
<4> Meg failure for electrical system other than the inverter
<5> Attach a ferrite core to the inverter output wiring. (Contact the fac-
tory for details of the service part settings.)
<6> Provide separate power supply to the air conditioner and other
electric appliances.
<7> If the error occurred suddenly, a ground fault of the inverter output
can be considered. See (2)-[4].
*Contact the factory for cases other than those listed above.
[9] Sudden malfunction (as a result of external noise.) <1> Check that the grounding work is performed properly.
<2>Check that the shielded wire is used as the transmission line when
it is required, and check that the grounding work is performed prop-
erly on the shielded wire.
<3>Check that neither the transmission line nor the external connec-
tion wiring does not run close to another power supply system or
does not run through the same conduit pipe.
* Contact the factory for cases other than those listed above.
HWE0609A - 231 - GB
[ IX Troubleshooting ]
HWE0609A - 232 - GB
[ IX Troubleshooting ]
HWE0609A - 233 - GB
[ IX Troubleshooting ]
HWE0609A - 234 - GB
[ IX Troubleshooting ]
(4) Simple checking procedure for individual components of main inverter circuit
Before checking, turn the power off and remove the parts to be checked from the control box.
A1 43 33 23 13
<P300 - P450 models>
Test button Check point Checking criteria
Between No. 1 pin and
Coil No. 3 pin of the CN03 on Not to be short-circuited
the noise filter board
With the test button
+ terminal on the diode turned off :
Contact stack and terminal
TB31 on the noise filter With the test button
turned on : 0
DC reactor DCL Measure the resistance between terminals: 1ohm or lower (almost 0 ohm)
Measure the resistance between terminals and the chassis:
Current sensor <P300 - P450 models>
ACCT Disconnect the CNCT2 connector and measure the resistance between terminals: 280 ohm 30 ohm
1 - 2 PIN (U-phase),3 - 4 PIN (W-phase)
IPM
W V U
ACCT-W W U ACCT-U
HWE0609A - 235 - GB
[ IX Troubleshooting ]
1) Notes on measurement
Check the polarity before measuring. (On the tester, black normally indicates plus.)
Check that the resistance is not open ( ohm) or not shorted (to 0 ohm).
The values are for reference, and the margin of errors is allowed.
The result that is more than double or half of the result that is measured at the same measurement point is not allowed.
2) Tester restriction
Use the tester whose internal electrical power source is 1.5V or greater
Use the dry-battery-powered tester.
(The accurate diode-specific resistance cannot be measured with the button-battery-powered card tester, as the applied volt-
age is low.)
Use a low-range tester if possible. A more accurate resistance can be measured.
3 P
1 4 7 10 16 2
Drive circuit
B
1
U
6
P
5
Drive circuit
N 4 V
W V U 9
8
Drive circuit
7 W
11
13 Drive circuit
10
14
Drive circuit
15
Drive circuit
12 B
N
Temperature
sensor
Overheating -protection
16 circuit
HWE0609A - 236 - GB
[ IX Troubleshooting ]
L1 L2 L3
to (L1) 5 - 200 - - -
ohm Internal circuit diagram
Red (-) to (L2) 5 - 200 - - -
ohm +
to (L3) 5 - 200 - - -
ohm L1
L2
L3
HWE0609A - 237 - GB
[ IX Troubleshooting ]
Surge protection
5 V Power supply Microcomputer
Outdoor unit
4-way valve Inverter drive
Microcomputer 18 V Power supply circuit
CH11 Relay, LEV
Drive circuit
LEV 5 V Power supply
5 V Power supply Microcomputer
12V Power supply DC / DC converter
M-NET board
Fuse
Detection circuit for
the power supply to
TB7 the transmission line Relay drive circuit
Terminal block for DC / DC
transmission line converter
CN40
for centralized control
(DC 24 ~ 30 V)
30 V Power supply
TB3
Indoor/outdoor Relay
transmission block
(DC 24 ~ 30 V)
M-NET
transmission line
(Non-polar 2 wire)
TB2
AC Power source
AC 208 / 230 V
Terminal block for
power source
TB15
Terminal block
Indoor unit
for MA remote
To next unit TB5 controller
(Indoor unit)
Terminal block
for transmission
line connection
DC 17 ~ 30 V
MA remote controller wiring
(Non-polar 2 wire)
A, B
DC 17 ~ 30 V M-NET remote
controller
A, B
DC 9 ~ 12 V MA remote
controller
HWE0609A - 238 - GB
[ IX Troubleshooting ]
Noise filter
Noise filter Rectifier 72C DCL Smoothing capacitor Inverter Compressor
TB1
AC 208 / 230 V INV board
Terminal block for Fuse 15V Power supply Inverter drive
power source circuit
Fuse
DC / DC
Surge protection converter Microcomputer
Fan board
Control board Heat
Fuse Inverter exchanger
Inverter reset Fuse fan
72C 63H1
Outdoor unit
circuit
Solenoid valve Inverter drive
4-way valve Microcomputer 18 V Power supply circuit
CH11 Relay, LEV
Drive circuit
LEV 5 V Power supply
5 V Power supply Microcomputer
12V Power supply DC / DC converter
M-NET board
Fuse
Detection circuit for
TB7 the power supply to
the transmission line Relay drive circuit DC / DC
Terminal block for
transmission line converter
for centralized control CN40
(DC 24 ~ 30 V)
30 V Power supply
TB3
Indoor/outdoor Relay
transmission block
(DC 24 ~ 30 V)
TB2
AC Power source
AC 208 / 230 V Terminal block for
power source
TB15
Indoor unit
Terminal block
for MA remote
TB5 controller
To next unit
(Indoor unit) Terminal block
for transmission
line connection
DC 17 ~ 30 V
MA remote controller wiring
(Non-polar 2 wire)
A, B
DC 17 ~ 30 V M-NET remote
controller
A, B
DC 9 ~ 12 V MA remote
controller
HWE0609A - 239 - GB
[ IX Troubleshooting ]
YES
DC 24 ~ 30 V Check whether the transmission line is disconnected,
NO check for contact failure, and repair the problem.
Check the voltage at TB3 after removing transmission line from TB3.
YES
DC 24 ~ 30 V Check if the indoor/outdoor transmission line is not
short-circuited, and repair the problem.
NO
Check whether the male connector is connected to
the female power supply connector (CN40).
NO
Connected
YES
YES Check the wiring between the control board and power
DC24 ~ 30V supply board for the transmission line (CN102 and CNIT),
and check for proper connection of connectors.
NO
NO Is there a wiring YES Fix the wiring and connector
Check voltage of TB7 by removing transmission line from TB7. error or a connector
disconnection? disconnection.
YES
DC24 ~ 30V Replace the control board.
NO
Check the voltage between No.1 and No.2 pins of the
CN102 on the power supply board for the transmission line.
NO
Check the voltage between No.5 and No.2 pins
of the CNIT on the control board.
Check the voltage between No.1 and No.3 pins of NO Is the voltage YES
measurement between Replace the M-NET board
the CNDC on the INV board. 4.5 and 5.2 VDC?
YES
DC265 ~ 357V Replace the M-NET board
NO
Check the voltage between SC-P1 and TB-N on the INV board.
YES
DC265 ~ 357V Check the inrush current resistance (R1).
YES Check the wiring between the noise filter and the
AC188 ~ 253V INV board as well as screw tightness, and fix any
problems found.
NO
Check the voltage at the power supply terminal block TB1.
YES
AC188 ~ 253V Replace the noise filter.
NO
Check and fix any power supply wiring and main power
supply problems found.
Turn on the
power again.
HWE0609A - 240 - GB
[ IX Troubleshooting ]
YES
DC 24 ~ 30 V Check whether the transmission line is disconnected,
check for contact failure, and repair the problem.
NO
Check the voltage at TB3 after removing transmission
line from TB3.
NO Connected
YES
YES Check the wiring between the control board and power
DC24 ~ 30V supply board for the transmission line (CN102 and CNIT),
and check for proper connection of connectors.
NO
NO Is there a wiring
YES
Fix the wiring and connector
Check voltage of TB7 by removing transmission line from TB7. error or a connector
disconnection? disconnection.
YES
DC24 ~ 30V Replace the control board.
NO
Check the voltage between No.1 and No.2 pins of the
CN102 on the power supply board for the transmission line.
NO
Check the voltage between No.5 and No.2 pins
of the CNIT on the control board.
Check the voltage between No.1 and No.3 pins of NO Is the voltage YES
the CNDC3 on the INV board. measurement between Replace the M-NET board
4.5 and 5.2 VDC?
YES
DC265 ~ 357V Replace the M-NET board
NO
Check the voltage between TB31 and TB42 on the noise filter.
YES
DC265 ~ 357V Replace the INV board.
NO
YES
DC265 ~ 357V Replace the noise filter.
NO
YES
AC188 ~ 253V Replace the diode stack.
NO
Check the voltage at the power supply terminal block TB1.
YES
AC188 ~ 253V Replace the noise filter.
NO
Check and fix any power supply wiring and main power
supply problems found.
Turn on the
power again.
HWE0609A - 241 - GB
[ IX Troubleshooting ]
SW1 SW1
1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10
ON ON
(3) Stop all the indoor units, and stop the compressor.
1) To stop all the indoor units and the compressors, turn SW3-2 from ON to OFF when SW3-1 on the outdoor control board is ON.
2) Check that all the indoor units are being stopped.
When the power to the outdoor/indoor unit must be turned off to repair the leak after closing the refrigerant service valves
specified in the item 4, turn the power off in approximately one hour after the outdoor/indoor units stop.
1) When 30 minutes have passed after the item 4 above, the indoor unit lev turns from fully closed to slightly open to prevent the
refrigerant seal.
LEV2a and LEV2b open when the outdoor unit remains stopped for 15 minutes to allow for the collection of refrigerant in the
outdoor unit heat exchanger and to enable the evacuation of the outdoor unit heat exchanger.
If the power is turned of in less than 5 minutes, LEV2a and LEV2b may close, trapping high-pressure refrigerant in the outdoor
unit heat exchanger and creating a highly dangerous situation.
2) Therefore, if the power source is turned off within 30 minutes, the lev remains fully closed and the refrigerant remains sealed.
When only the power for the indoor unit is turned off, the indoor unit LEV turns from faintly open to fully closed.
HWE0609A - 242 - GB
[ IX Troubleshooting ]
3. Leak spot: In the case of extension pipe for indoor unit (Heating season)
(1) Run all the indoor units in heating test run mode.
1) To run the indoor unit in test run mode, turn SW3-2 from ON to OFF when SW3-1 on the outdoor control board is ON.
2) Change the setting of the remote controller for all the indoor units to the heating mode.
3) Check that all the indoor units are performing a heating operation.
(2) Stop all the indoor units, and stop the compressor.
1) To stop all the indoor units and the compressors, turn SW3-2 from ON to OFF when SW3-1 on the outdoor control board is ON.
2) Check that all the indoor units are stopped.
If the indoor or outdoor units need to be turned off for repairing leaks during Step 1) above, turn off the power approximately
1 hour after the units came to a stop.
If the power is turned off in less than 15 minutes, LEV2a and LEV2b may close, trapping high-pressure refrigerant in the out-
door unit heat exchanger and creating a highly dangerous situation.
HWE0609A - 243 - GB
[ IX Troubleshooting ]
Compressor cover
(front)
1. Remove both the top and bottom service panels 2. Remove the control box and the compressor
(front panels). cover (front).
Frame
Electric
wiring
HWE0609A - 244 - GB
[ IX Troubleshooting ]
Compressor covers
(right and left)
(The inside of the compressor
cover is lined with sound
insulation material.)
Compressor cover
(top)
Belt heater
4. Remove the compressor cover (top). 5. Remove the compressor wires, compressor covers
(right and left), and belt heater.
Suction piping
HWE0609A - 245 - GB
[ IX Troubleshooting ]
2. LED is blank.
Take the following troubleshooting steps.
(1) If the voltage between pins 1 and 3 of CNDC on the control board is outside the range between 220 VDC and 320 VDC,
refer to 9 [4] -7- (2) Troubleshooting transmission power circuit of outdoor unit.
(2) If the LED error display becomes lit when the power is turned on with all the connectors on the control board except
CNDE disconnected, there is a problem with the wiring to those connectors or with the connectors themselves.
(3) If nothing appears on the display under item (2) above AND the voltage between pins 1 and 3 of CNDC is within the
range between 220 VDC and 320 VDC, control board failure is suspected.
(2) If the LED display appears as noted in 10. [1] 2. "LED display at Initial setting" while the transmission cables to TB3
and TB7 are disconnected, failure with the transmission cable or the connected equipment is suspected.
HWE0609A - 246 - GB
X LED Monitor Display on the Outdoor Unit Board
[1] How to Read the LED on the Service Monitor ............................................................... 249
HWE0609A - 247 - GB
- 248 -
[ X LED Monitor Display on the Outdoor Unit Board ]
X LED Monitor Display on the Outdoor Unit Board
2) Flag display
Example: When 21S4a, 21S4b, SV1a are ON. (Item No. 3)
Upper
Lower
Refrigerant type
2 [ 410] : R410A
Communication address
4 [ 51] : Address 51
After the initial settings have been completed, the information on these items can be checked by making the switch setting
that corresponds to No. 517 in the LED display table.
Only item No. 1 "Software Version" appears on the display if there is a wiring failure between the control board and the trans-
mission line power supply board or if the circuit board has failed.
HWE0609A - 249 - GB
[ X LED Monitor Display on the Outdoor Unit Board ]
The outdoor unit has a simple clock function that enables the unit to calculate the current time with an internal timer by receiv-
ing the time set by the system controller, such as G(B)-50A.
If an error (including a preliminary error) occurs, the error history data and the error detection time are stored into the service
memory.
The error detection time stored in the service memory and the current time can be seen on the service LED.
2) Date display
When the main controller that can set the time is connected
Example: May 10, 2003
Alternate display
When the main controller that can set the time is not connected
Example: 52 days after power was turned on
Alternate display
Day count
* Appears between the year and the month, and nothing
appears when the date is displayed.
HWE0609A - 250 - GB
XLED monitor display on the outdoor unit board
Current data
HWE0609A
Unit
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
play.
- 251 -
4 0010000000 3 transmis- A A
sion line
Bottom
5 1010000000
6 0110000000
8 0001000000
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Current data
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
13 1011000000
failure
Indoor unit Top Unit No. 1 Unit No. 2 Unit No. 3 Unit No. 4 Unit No. 5 Unit No. 6 Unit No. 7 Unit No. 8 B The lamp that corre-
16 0000100000 check sponds to the unit that
Bottom Unit No. 9 Unit No. 10 Unit No. 11 Unit No. 12 Unit No. 13 Unit No. 14 Unit No. 15 Unit No. 16 came to an abnormal stop
lights.
- 252 -
Top Unit No. 17 Unit No. 18 Unit No. 19 Unit No. 20 Unit No. 21 Unit No. 22 Unit No. 23 Unit No. 24
17 1000100000 The lamp goes off when
Bottom Unit No. 25 Unit No. 26 Unit No. 27 Unit No. 28 Unit No. 29 Unit No. 30 Unit No. 31 Unit No. 32 the error is reset.
Each unit that comes to
Top Unit No. 33 Unit No. 34 Unit No. 35 Unit No. 36 Unit No. 37 Unit No. 38 Unit No. 39 Unit No. 40
18 0100100000 an abnormal unit will be
Bottom Unit No. 41 Unit No. 42 given a sequential num-
ber in ascending order
Top starting with 1.
19 1100100000
Bottom
Indoor unit Top Unit No. 1 Unit No. 2 Unit No. 3 Unit No. 4 Unit No. 5 Unit No. 6 Unit No. 7 Unit No. 8 B Lit during cooling
20 0010100000 Operation Lit during heating
mode Bottom Unit No. 9 Unit No. 10 Unit No. 11 Unit No. 12 Unit No. 13 Unit No. 14 Unit No. 15 Unit No. 16 Unlit while the unit is
Top Unit No. 17 Unit No. 18 Unit No. 19 Unit No. 20 Unit No. 21 Unit No. 22 Unit No. 23 Unit No. 24 stopped or in the fan
21 1010100000 mode
Bottom Unit No. 25 Unit No. 26 Unit No. 27 Unit No. 28 Unit No. 29 Unit No. 30 Unit No. 31 Unit No. 32
Top Unit No. 33 Unit No. 34 Unit No. 35 Unit No. 36 Unit No. 37 Unit No. 38 Unit No. 39 Unit No. 40
22 0110100000
Bottom Unit No. 41 Unit No. 42
Top
23 1110100000
Bottom
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Current data
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
Indoor unit Top Unit No. 1 Unit No. 2 Unit No. 3 Unit No. 4 Unit No. 5 Unit No. 6 Unit No. 7 Unit No. 8 B Lit when thermostat is on
24 0001100000 thermo- Unlit when thermostat is
stat Bottom Unit No. 9 Unit No. 10 Unit No. 11 Unit No. 12 Unit No. 13 Unit No. 14 Unit No. 15 Unit No. 16 off
Top Unit No. 17 Unit No. 18 Unit No. 19 Unit No. 20 Unit No. 21 Unit No. 22 Unit No. 23 Unit No. 24
25 1001100000
Bottom Unit No. 25 Unit No. 26 Unit No. 27 Unit No. 28 Unit No. 29 Unit No. 30 Unit No. 31 Unit No. 32
Top Unit No. 33 Unit No. 34 Unit No. 35 Unit No. 36 Unit No. 37 Unit No. 38 Unit No. 39 Unit No. 40
26 0101100000
Bottom Unit No. 41 Unit No. 42
Top
27 1101100000
Bottom
28 0011100000
[ X LED monitor display on the outdoor unit board ]
29 1011100000
30 0111100000
31 1111100000
32 0000010000
- 253 -
33 1000010000
34 0100010000
35 1100010000
36 0010010000
37 1010010000
38 0110010000
40 0001010000
41 1001010000
Refrigerant
43 1101010000 A A
recovery
44 0011010000
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Current data
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
51 1100110000
52 0010110000
53 1010110000
[ X LED monitor display on the outdoor unit board ]
54 0110110000
55 1110110000
- 254 -
High-pressure sensor The unit is [kgf/cm2]
58 0101110000 -99.9 to 999.9 A A
data
Low-pressure sensor
59 1101110000 -99.9 to 999.9 A A
data
60 0011110000
61 1011110000
62 0111110000
63 1111110000
64 0000001000
65 1000001000
66 0100001000
67 1100001000
68 0010001000
69 1010001000
70 0110001000
71 1110001000
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Current data
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
72 0001001000
73 1001001000
74 0101001000
75 1101001000
76 0011001000
77 1011001000
- 255 -
85 1010101000
Control frequency of
88 0001101000 0000 to 9999 A A
COMP
89 1001101000
90 0101101000
91 1101101000
92 0011101000
97 1000011000
98 0100011000
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Current data
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
99 1100011000
100 0010011000
101 1010011000
102 0110011000
105 1001011000
106 0101011000
[ X LED monitor display on the outdoor unit board ]
107 1101011000
109 1011011000
110 0111011000
- 256 -
COMP bus voltage The unit is
111 1111011000 00.0 to 999.9 A A
[V]
112 0000111000
113 1000111000
114 0100111000
115 1100111000
Integrated cleaning
119 1110111000 0000 to 9999 B
time (minute)
120 0001111000
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Current data
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
Backup mode High pres- Control box Stays lit for 90 seconds
Abnormal High-pres- Low-pres- Abnormal Td
121 1001111000 sure during temperature A A after the completion of
pressure rise sure drop sure drop rise
defrost rise backup control
122 0101111000
125 1011111000
126 0111111000
[ X LED monitor display on the outdoor unit board ]
127 1111111000
128 0000000100
- 257 -
130 0100000100
131 1100000100
132 0010000100
133 1010000100
134 0110000100
135 1110000100
136 0001000100
137 1001000100
138 0101000100
139 1101000100
140 0011000100
141 1011000100
142 0111000100
143 1111000100
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Current data
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
144 0000100100
145 1000100100
146 0100100100
147 1100100100
148 0010100100
149 1010100100
150 0110100100
151 1110100100
152 0001100100
[ X LED monitor display on the outdoor unit board ]
153 1001100100
154 0101100100
155 1101100100
156 0011100100
- 258 -
157 1011100100
158 0111100100
159 1111100100
160 0000010100
161 1000010100
162 0100010100
163 1100010100
164 0010010100
165 1010010100
166 0110010100
167 1110010100
168 0001010100
169 1001010100
170 0101010100
171 1101010100
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Current data
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
172 0011010100
173 1011010100
174 0111010100
175 1111010100
176 0000110100
177 1000110100
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
[ X LED monitor display on the outdoor unit board ]
- 259 -
Current data
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
178 0100110100 Error history 1 0000 to 9999 B B Address and error codes
highlighted
179 1100110100 Error details of inverter Error details of inverter (0001-0120) A A If no errors are detected,
180 0010110100 Error history 2 0000 to 9999 B B "---- " appears on the dis-
play.
181 1010110100 Error details of inverter Error details of inverter (0001-0120) A A Preliminary error informa-
tion of the OS does not
182 0110110100 Error history 3 0000 to 9999 B B
appear on the OC.
183 1110110100 Error details of inverter Error details of inverter (0001-0120) A A Neither preliminary error
information of the OC nor
184 0001110100 Error history 4 0000 to 9999 B B error information of the IC
appears on the OS.
185 1001110100 Error details of inverter Error details of inverter (0001-0120) A A
- 260 -
191 1111110100 Error details of inverter Error details of inverter (0001-0120) A A
200 0001001100
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Error history
HWE0609A
Unit
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
203 1101001100
204 0011001100
206 0111001100
[ X LED monitor display on the outdoor unit board ]
207 1111001100
- 261 -
Refrigerant
209 1000101100 A A
recovery
210 0100101100
Bottom
214 0110101100
215 1110101100
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Error history
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
222 0111101100
223 1111101100
224 0000011100
[ X LED monitor display on the outdoor unit board ]
225 1000011100
226 0100011100
- 262 -
High-pressure sensor The unit is [kgf/cm2]
229 1010011100 -99.9 to 999.9 A A
data
Low-pressure sensor
230 0110011100 -99.9 to 999.9 A A
data
231 1110011100
232 0001011100
233 1001011100
234 0101011100
235 1101011100
236 0011011100
237 1011011100
238 0111011100
239 1111011100
240 0000111100
241 1000111100
242 0100111100
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Error history
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
243 1100111100
244 0010111100
245 1010111100
246 0110111100
247 1110111100
248 0001111100
- 263 -
256 0000000010
260 0010000010
261 1010000010
262 0110000010
263 1110000010
268 0011000010
269 1011000010
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Error history
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
270 0111000010
271 1111000010
272 0000100010
273 1000100010
276 0010100010
277 1010100010
[ X LED monitor display on the outdoor unit board ]
278 0110100010
280 0001100010
281 1001100010
- 264 -
282 0101100010 COMP bus voltage 00.0 to 999.9 A A The unit is [ V ]
283 1101100010
284 0011100010
285 1011100010
286 0111100010
287 1111100010
290 0100010010
291 1100010010
292 0010010010
293 1010010010
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Error history
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
296 0001010010
297 1001010010
298 0101010010
299 1101010010
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
- 265 -
Current data
HWE0609A
Unit
SW1 Display
No. Item (A, B)*1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
303 1111010010
304 0000110010
305 1000110010
306 0100110010
307 1100110010
308 0010110010
309 1010110010
[ X LED monitor display on the outdoor unit board ]
310 0110110010
311 1110110010
312 0001110010
313 1001110010
- 266 -
314 0101110010
315 1101110010
316 0011110010
317 1011110010
318 0111110010
319 1111110010
320 0000001010
321 1000001010
322 0100001010
323 1100001010
324 0010001010
325 1010001010
326 0110001010
327 1110001010
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Current data
Unit
HWE0609A
SW1 Display
No. Item (A, B)*1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
328 0001001010
329 1001001010
330 0101001010
331 1101001010
332 0011001010
333 1011001010
334 0111001010
335 1111001010
336 0000101010
[ X LED monitor display on the outdoor unit board ]
337 1000101010
338 0100101010
339 1100101010
340 0010101010
- 267 -
341 1010101010
342 0110101010
343 1110101010
344 0001101010
345 1001101010
346 0101101010
347 1101101010
348 0011101010
349 1011101010
350 0111101010
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
HWE0609A
Unit
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
351 1111101010 IC1 Address/capacity code 0000 to 9999 0000 to 9999 B Displayed alternately ev-
ery 5 seconds
352 0000011010 IC2 Address/capacity code 0000 to 9999 0000 to 9999
- 268 -
364 0011011010 IC14 Address/capacity code 0000 to 9999 0000 to 9999
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
368 0000111010 IC18 Address/capacity code 0000 to 9999 0000 to 9999 B Displayed alternately ev-
ery 5 seconds
369 1000111010 IC19 Address/capacity code 0000 to 9999 0000 to 9999
- 269 -
381 1011111010 IC31 Address/capacity code 0000 to 9999 0000 to 9999
393 1001000110
394 0101000110
395 1101000110
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
396 0011000110
397 1011000110
398 0111000110
399 1111000110
400 0000100110
401 1000100110
402 0100100110
403 1100100110
404 0010100110
[ X LED monitor display on the outdoor unit board ]
405 1010100110
406 0110100110
407 1110100110
408 0001100110 IC1 Suction temperature -99.9 to 999.9 B The unit is [°C]
- 270 -
409 1001100110 IC2 Suction temperature -99.9 to 999.9
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
412 0011100110 IC5 Suction temperature -99.9 to 999.9 B The unit is [°C]
- 271 -
425 1001010110 IC18 Suction temperature -99.9 to 999.9
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
436 0010110110 IC29 Suction temperature -99.9 to 999.9 B The unit is [°C]
- 272 -
449 1000001110 IC42 Suction temperature -99.9 to 999.9
450 0100001110
451 1100001110
452 0010001110
453 1010001110
454 0110001110
455 1110001110
456 0001001110
457 1001001110
458 0101001110 IC1 Liquid pipe temperature -99.9 to 999.9 B The unit is [°C]
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
464 0000101110 IC7 Liquid pipe temperature -99.9 to 999.9 B The unit is [°C]
- 273 -
477 1011101110 IC20 Liquid pipe temperature -99.9 to 999.9
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
492 0011011110 IC35 Liquid pipe temperature -99.9 to 999.9 B The unit is [°C]
500 0010111110
[ X LED monitor display on the outdoor unit board ]
501 1010111110
502 0110111110
503 1110111110
504 0001111110
- 274 -
505 1001111110
506 0101111110
507 1101111110
508 0011111110
509 1011111110
510 0111111110
511 1111111110
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Setting data
HWE0609A
Unit
SW1 Display
No. Item (A, B)*1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
512 0000000001 Self-address Alternate display of self address and unit model A A
517 1010000001 Version/Capacity S/W version -> Refrigerant type -> Model and capacity -> Communication address A A
519 1110000001
520 0001000001
[ X LED monitor display on the outdoor unit board ]
521 1001000001
522 0101000001
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
- 275 -
Data on indoor unit system
HWE0609A
Unit
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
523 1101000001 IC1 Gas pipe temperature -99.9 to 999.9 B The unit is [°C]
- 276 -
536 0001100001 IC14 Gas pipe temperature -99.9 to 999.9
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
HWE0609A
Unit
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
550 0110010001 IC28Gas pipe temperature -99.9 to 999.9 B The unit is [°C]
- 277 -
563 1100110001 IC41 Gas pipe temperature -99.9 to 999.9
565 1010110001
566 0110110001
567 1110110001
568 0001110001
569 1001110001
570 0101110001
571 1101110001
572 0011110001
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
HWE0609A
Unit
SW1 Display
No. Item (A, B)*1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
- 278 -
586 0101001001 IC14SH -99.9 to 999.9
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B)*1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
- 279 -
613 1010011001 IC41SH -99.9 to 999.9
615 1110011001
616 0001011001
617 1001011001
618 0101011001
619 1101011001
620 0011011001
621 1011011001
622 0111011001
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
HWE0609A
Unit
SW1 Display
No. Item (A, B)*1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
- 280 -
636 0011111001 IC14SC -99.9 to 999.9
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B)*1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
- 281 -
663 1110100101 IC41SC -99.9 to 999.9
665 1001100101
666 0101100101
667 1101100101
668 0011100101
669 1011100101
670 0111100101
671 1111100101
672 0000010101
673 1000010101
674 0100010101
675 1100010101
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Setting data
HWE0609A
Unit
SW1 Display
No. Item (A, B)* 1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
677 1010010101
678 0110010101
680 0001010101
681 1001010101
682 0101010101
683 1101010101
684 0011010101
[ X LED monitor display on the outdoor unit board ]
685 1011010101
686 0111010101
687 1111010101
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
- 282 -
Setting data
Unit
HWE0609A
SW1 Display
No. Item (A, B)* 1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
- 283 -
698 0101110101 Time of error detection 5 00:00 to 23:59 Hour: minute
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Setting data
Unit
HWE0609A
SW1 Display
No. Item (A, B)* 1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
Time of last data backup be- Year and month, and date
711 1110001101 00.00 to 99.12/1 to 31
fore error -2 alternate display
- 284 -
712 0001001101
713 1001001101
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
HWE0609A
Unit
SW1 Display
No. Item (A, B)* 1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
714 0101001101 IC1 LEV opening 0000 to 9999 B Fully open: 2000
- 285 -
727 1110101101 IC14 LEV opening 0000 to 9999
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B)* 1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
741 1010011101 IC28 LEV opening 0000 to 9999 B Fully open: 2000
- 286 -
754 0100111101 IC41 LEV opening 0000 to 9999
756 0010111101
757 1010111101
758 0110111101
759 1110111101
760 0001111101
761 1001111101
762 0101111101
763 1101111101
766 0111111101 IC3Operation mode 0000 : Stop 0001 : Ventilation 0002 : Cooling 0003 : Heating 0004 : Dry
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B)* 1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
- 287 -
782 0111000011 IC19 Operation mode
0000 : Stop 0001 : Ventilation 0002 : Cooling 0003 : Heating 0004 : Dry
783 1111000011 IC20 Operation mode
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B)* 1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
801 1000010011 IC38 Operation mode 0000 : Stop 0001 : Ventilation 0002 : Cooling 0003 : Heating 0004 : Dry
806 0110010011
807 1110010011
808 0001010011
809 1001010011
- 288 -
810 0101010011
811 1101010011
812 0011010011
813 1011010011
814 0111010011 IC1 filter 0000 to 9999 B Hours since last mainte-
nance [ h ]
815 1111010011 IC2 filter 0000 to 9999
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B)* 1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
825 1001110011 IC12 filter 0000 to 9999 B Hours since last mainte-
nance [ h ]
826 0101110011 IC13 filter 0000 to 9999
- 289 -
838 0110001011 IC25 filter 0000 to 9999
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Data on indoor unit system
Unit
HWE0609A
SW1 Display
No. Item (A, B)* 1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
853 1010101011 IC40 filter 0000 to 9999 B Hours since last mainte-
nance [ h ]
854 0110101011 IC41 filter 0000 to 9999
856 0001101011
857 1001101011
858 0101101011
859 1101101011
860 0011101011
861 1011101011
[ X LED monitor display on the outdoor unit board ]
862 0111101011
863 1111101011
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
- 290 -
Other types of data
HWE0609A
Unit
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
864 0000011011
865 1000011011
866 0100011011
867 1100011011
868 0010011011
869 1010011011
870 0110011011
874 0101011011
- 291 -
875 1101011011
876 0011011011
877 1011011011
878 0111011011
879 1111011011
INV board
881 1000111011 0 to 254 A A
Reset counter
882 0100111011
883 1100111011
885 1010111011
886 0110111011
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.
Other types of data
Unit
HWE0609A
SW1 Display
No. Item (A, B) *1 Remarks
1234567890 LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8 OC OS
887 1110111011
888 0001111011
889 1001111011
890 0101111011
891 1101111011
892 0011111011
893 1011111011
894 0111111011
895 1111111011
[ X LED monitor display on the outdoor unit board ]
896 0000000111
897 1000000111
898 0100000111
899 1100000111
- 292 -
900 0010000111
901 1010000111
902 0110000111
903 1110000111
904 0001000111
905 1001000111
906 0101000111
907 1101000111
1020 0011111111
1021 1011111111
1022 0111111111
1023 1111111111
*1 A: The condition of either OC or OS is displayed individually. B: The condition of the entire refrigerant system is displayed.