TW30HQ2B4D

Service Manual
Service Manual
Table of Contents
Part Ⅰ : Technical Information........................................................................1

1. Summary.......................................................................................................................1
2. Specifications...........................................................................................................2
2.1 Specification Sheet............................................................................................................2
2.2 Capacity Variation Ratio According to Temperature..........................................................4
2.3 Noise Curve.......................................................................................................................5
2.4 Cooling and Heating Data Sheet in Rated Frequency......................................................5
3. Outline Dimension Diagram.........................................................................6
3.1 Indoor Unit.........................................................................................................................6
3.2 Outdoor Unit......................................................................................................................6
4. Refrigerant System Diagram.......................................................................7
5. Electrical Part...........................................................................................................9
5.1 Wiring Diagram..................................................................................................................9
5.2 PCB Printed Diagram...................................................................................................... 11
6. Function and Control.......................................................................................13
6.1 Remote Controller Introduction.......................................................................................13
6.2 Ewpe Smart App Operation Manual................................................................................18
6.3 Brief Description of Modes and Functions.......................................................................19
Part Ⅱ : Installation and Maintenance ..................................................22

7. Notes for Installation and Maintenance...........................................22
8. Installation.................................................................................................................25
8.1 Installation Dimension Diagram.......................................................................................25
8.2 Installation Parts-checking .............................................................................................27
8.3 Selection of Installation Location.....................................................................................27
8.4 Requirements for electric connection..............................................................................27
8.5 Installation of Indoor Unit.................................................................................................27
8.6 Installation of Outdoor Unit..............................................................................................30
8.7 Vacuum Pumping and Leak Detection............................................................................31
8.8 Check after Installation and Test Operation....................................................................31
Table of contents
Service Manual
9. Troubleshooting...................................................................................................32
9.1 Flashing LED of Indoor/Outdoor Unit and Primary Judgement.......................................32
9.2 How to Check Simply the Main Part................................................................................40
9.3 Troubleshooting for Normal Malfunction..........................................................................56
10. Exploded View and Parts List...............................................................58
10.1 Indoor Unit.....................................................................................................................58
10.2 Outdoor Unit..................................................................................................................62
11. Removal Procedure........................................................................................64
11.1 Removal Procedure of Indoor Unit................................................................................64
11.2 Removal Procedure of Outdoor Unit.............................................................................73
Appendix:.........................................................................................................................79
Appendix 1: Reference Sheet of Celsius and Fahrenheit.....................................................79
Appendix 2: Configuration of Connection Pipe......................................................................79
Appendix 3: Pipe Expanding Method....................................................................................80
Appendix 4: List of Resistance for Temperature Sensor.......................................................81
Table of contents
Service Manual
Part Ⅰ : Technical Information

1. Summary
Indoor Unit:
TW30HQ2B4DI TW36HQ2B4DI
Outdoor Unit: Remote Controller:
TW30HQ2B4DO
TW36HQ2B4DO YAN1F6F(WiFi)
Model List:
Remote
No Model Product code Indoor model Indoor product code Outdoor model Outdoor product code
Controller
1 TW30HQ2B4D(WIFI) CB434004801_L87641 TW30HQ2B4DI CB434N04801_L87641 TW30HQ2B4DO CB171W10600_L87641 YAN1F6F
2 TW36HQ2B4D(WIFI) CB432008101_L87641 TW36HQ2B4DI CB432N08101_L87641 TW36HQ2B4DO CB432W08100_L87641 (WiFi)
Technical Information 1
Service Manual
2. Specifications
2.1 Specification Sheet
Model TW30HQ2B4D(WIFI) TW36HQ2B4D(WIFI)
Product Code CB434004801_L87641 CB432008101_L87641
Rated Voltage V~ 208/230 208/230
Power Supply Rated Frequency Hz 60 60
Phases 1 1
Power Supply Mode Outdoor Outdoor
Cooling Capacity(Min~Max) Btu/h 28000(9485~30026) 33600(7404~35997)
Heating Capacity(Min~Max) Btu/h 28400(9997~32994) 34600(14979~35997)
Cooling Power Input(Min~Max) W 2705(600~3900) 4100(450~4300)
Heating Power Input(Min~Max) W 2800(650~4000) 3800(560~4300)
Cooling Power Current A 11.5 17
Heating Power Current A 12 16.5
Rated Input W 4000 4300
Rated Current A 17 20
Rated Heating Current A 17.5 20
Air Flow Volume(SH/H/M/L) CFM 706/618/530/412 883/765/647/559
Dehumidifying Volume Pint/h 6.34 7.4
EER (Btu/h)/W 10.36 8.2
COP (Btu/h)/W 10.14 9.11
SEER 18 18
HSPF 9 9
2
Application Area yd 41.86-62.19 55.01-83.72
Model of indoor unit TW30HQ2B4DI TW36HQ2B4DI
Indoor Unit Product Code CB434N04801_L87641 CB432N08101_L87641
Fan Type Cross-flow Cross-flow
Diameter Length(DXL) inch Φ4 1/4X20 9/16X2 Φ4 1/4X20 9/16X2
Fan Motor Cooling Speed (SH/H/M/L) r/min 1350/1150/950/850 1400/1250/1000/800
Fan Motor Heating Speed (SH/H/M/L) r/min 1350/1200/1000/800 1400/1250/1050/850
Output of Fan Motor W 70 70
Fan Motor RLA A 0.4 0.4
Fan Motor Capacitor μF / /
Evaporator Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Pipe Diameter inch Φ9/32 Φ9/32
Indoor Unit Row-fin Gap inch 2-1/16 2-1/16
Coil Length (LXDXW) inch 42 9/32X1X15 42 9/32X1X15X2
Swing Motor Model MP24BA MP24BA
Output of Swing Motor W 1.5 1.5
Fuse A 3.15 5
Sound Pressure Level (SH/H/M/L) dB (A) 51/45/41/37 54/49/44/37
Sound Power Level (SH/H/M/L) dB (A) 61/55/51/47 64/59/54/47
Dimension (WXHXD) inch 53 9/64X12 53/64X9 61/64 53 9/64X12 53/64X9 61/64
Dimension of Carton Box (LXWXH) inch 56 39/64X16 29/64X13 55/64 56 39/64X16 29/64X13 55/64
Dimension of Package (LXWXH) inch 56 47/64X16 37/64X14 7/16 56 47/64X16 37/64X14 7/16
Net Weight Ib 41.9 41.9
Gross Weight Ib 51.8 51.8
2 Technical Information
Service Manual
Model of Outdoor Unit TW30HQ2B4DO TW36HQ2B4DO

Outdoor Unit Product Code CB171W10600_L87641 CB432W08100_L87641
ZHUHAI LAMDA ZHUHAI LAMDA
Compressor Manufacturer/Trademark
COMPERSSOR CO.LTD. COMPRESSORCO., LTD.
Compressor Model QXAS-D23zX090 QXAS-D32zX090A
Compressor Oil RB68EP FV50S
Compressor Type Rotary Rotary
Compressor Locked Rotor Amp (L.R.A) 40 67
Compressor RLA A 13.45 17.5
Compressor Power Input W 2450 4150
1NT11L-6233/HPC 115/95/KSD
Overload Protector 1NT11L-6233
115oC
Electron expansion
Throttling Method Electron expansion valve
valve+Capillary
Operation temp ºF 61~86 61~86
Ambient temp (cooling) ºF 0~115 0~109
Ambient temp (heating) ºF -4~75 -4~75
Condenser Form Aluminum Fin-copper Tube Aluminum Fin-copper Tube
Pipe Diameter inch Φ5/16 Φ5/16
Rows-fin Gap inch 2-1/16 2-1/16
Coil Length (LXDXW) inch 37 1/2X1 1/2X29 7/16 37X1 3/4X30
Fan Motor Speed rpm 795 890
Outdoor Unit
Output of Fan Motor W 120 170
Fan Motor RLA A 0.45 0.73
Fan Motor Capacitor μF / /
Air Flow Volume of Outdoor Unit CFM 2354 2589
Fan Type Axial-flow Axial-flow
Fan Diameter inch Φ21 21/32 Φ21 21/32
Defrosting Method Automatic Defrosting Automatic Defrosting
Climate Type T1 T1
Isolation I I
Moisture Protection IPX4 IPX4
Design Pressure(High) PSIG 550 550
Design Pressure(Low) PSIG 240 240
Sound Pressure Level (H/M/L) dB (A) 62/-/- 65/-/-
Sound Power Level (H/M/L) dB (A) 72/-/- 75/-/-
Dimension (WXHXD) inch 39 1/2X31 7/64X16 13/16 39 1/2X31 7/64X16 13/16
Dimension of Carton Box (LXWXH) inch 42 1/2X19X33 42 1/2X19X33
Dimension of Package (LXWXH) inch 42 21/32X19 13/64X33 21/32 42 21/32X19 13/64X33 21/32
Net Weight Ib 154.3 158.8
Gross Weight Ib 165.4 169.8
Refrigerant R410A R410A
Refrigerant Charge oz 84.66 91.71
Length ft 24.6 24.6
Gas Additional Charge oz/ft 0.5 0.5
Outer Diameter Liquid Pipe inch 1/4 1/4
Connection
Outer Diameter Gas Pipe inch 5/8 5/8
Pipe
Max Distance Height ft 32 3/16 32 3/16
Max Distance Length ft 98 27/64 98 27/64
Note:The connection pipe applies metric diameter.
The above data is subject to change without notice; please refer to the nameplate of the unit.
Service Manual
2.2 Capacity Variation Ratio According to Temperature

Heating operation ambient temperature range is -4ºF~75ºF
Cooling Heating
105 110
100
100
95
Capacity ratio (%)
Capacity ratio (%)

90 90
85
80 80
75 70
70
Conditions 60 Conditions
65 Indoor: DB 80°F WB66 °F Indoor:DB 70°F
60 Indoor air flow: Super High Indoor air flow:Super High
Pipe length : 24.6ft 50 Pipe length: 24.6ft
55
50 40
90 95 100 105 109 -4 5 14 23 32 41 50
Outdoor temp. (˚F) Outdoor temp. (˚F)
Cooling Heating
105 110
100
100
95
Capacity ratio (%)
Capacity ratio (%)
90 90
85
80 80
75 70
70
Conditions 60 Conditions
65 Indoor: DB 80°F WB66 °F Indoor:DB 70°F
60 Indoor air flow: Super High Indoor air flow:Super High
Pipe length : 24.6ft 50 Pipe length: 24.6ft
55
50 40
90 95 100 105 109 -13 5 14 23 32 41 50
Outdoor temp. (˚F) Outdoor temp. (˚F)

Cooling Heating
140
120 140
100 120
Capacity ratio (%)
Capacity ratio (%)
100
80
80
60
60
40
40
20 20
0 0
0 14 23 32 59 68 77 86 95 104 109 115 -31 -22 -13 -4 5 18 35 45 50 59 68 75
Service Manual
2.3 Noise Curve
Indoor side noise Outdoor side noise

60
80
75
36K
70
Noise/dB(A)
50
Noise dB(A)
65 36K
60
30K
40 30K
55
50
30 45
L M H SH 20 30 40 50 60 70 80 90 100
Indoor fan motor rating speed Compressor frequency(Hz)
2.4 Cooling and Heating Data Sheet in Rated Frequency

Cooling:
Pressure of gas pipe Inlet and outlet pipe

Rated cooling Compressor
connecting indoor and temperature of heat Fan speed of Fan speed of
condition(°F) (DB/WB) Model revolution
outdoor unit exchanger indoor unit outdoor unit
(rps)
Indoor Outdoor P (PSIG) T1 (°F) T2 (°F)
80/66 95/- 30K 130~145 46.8 to 52.8 127 to 96.8 Super High High 46
80/66 95/- 36K 130~145 46.8 to 52.8 127 to 96.8 Super High High 37
Heating:
Pressure of gas pipe Inlet and outlet pipe

Rated heating Compressor
connecting indoor and temperature of heat Fan speed of Fan speed of
condition(°F) (DB/WB) Model revolution
outdoor unit exchanger indoor unit outdoor unit
(rps)
Indoor Outdoor P (PSIG) T1 (°F) T2 (°F)
70/- 20/19 30K 507~550 134.4 to 102 36 to 39 Super High High 46
70/- 20/19 36K 507~550 134.4 to 102 36 to 39 Super High High 34
Instruction:
T1: Inlet and outlet pipe temperature of evaporator
T2: Inlet and outlet pipe temperature of condenser
P: Pressure at the side of big valve
Connection pipe length: 24.6ft.
Service Manual
3. Outline Dimension Diagram

3.1 Indoor Unit
12 53/64
53 9/64 9 61/34
13 25/32 29 3/8 10
Φ2 3/4 Φ2 3/4
1 37/64
11 19/32 3 1/2 Unit:inch
3.2 Outdoor Unit

TW30HQ2B4DO
TW36HQ2B4DO
14 37/64 36 2/9
31 7/64
39 1/2 16 13/16
24
15 9/16
Unit:inch
Service Manual
4. Refrigerant System Diagram

30K
Cooling only model
Indoor unit Outdoor unit
Gas pipe
side
Valve
Discharge
Heat
exchanger
(evaporator) Suction Accumlator
Compressor
Heat
exchanger
Liquid pipe (condenser)
side
Valve Electron Capillary Strainer
expansion
valve
COOLING
Cooling and heating model
Gas pipe
side
Valve
4-Way valve
Discharge
Heat Suction Accumlator

exchanger Compressor
(evaporator)
Heat
exchanger
side
Valve Strainer Electron Capillary Strainer
expansion
valve
COOLING
HEATING
Connection pipe specification:

Liquid pipe:1/4 inch
Gas pipe:5/8 inch
Service Manual
36K
Cooling only model

Gas pipe
side
Valve
Discharge
Heat
exchanger
(evaporator) Suction Accumlator
Compressor
Heat
exchanger
side
Valve Electron Strainer
expansion
valve
COOLING
Cooling and heating model
Gas pipe
side
Valve
4-Way valve
Discharge
Heat Suction Accumlator

exchanger Compressor
(evaporator)
Heat
exchanger
side
Valve Strainer Electron Strainer
expansion
valve
COOLING
HEATING
Connection pipe specification:

Liquid pipe:1/4 inch
Gas pipe:5/8 inch
Service Manual
5. Electrical Part
5.1 Wiring Diagram
● Instruction
Symbol Symbol Color Symbol Symbol Color Symbol Name

WH White GN Green CAP Jumper cap
YE Yellow BN Brown COMP Compressor
RD Red BU Blue Grounding wire
YEGN Yellow/Green BK Black / /
VT Violet OG Orange / /
Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model.
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Service Manual
● Outdoor Unit
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Service Manual
5.2 PCB Printed Diagram

Indoor Unit
Top View
4 5 6 7 8 9 10
1 Grounding wire
2 DC motor needle stand
Communication terminal for
3
outdoor unit
Interface of health function(only
4
11 for the mode with this function)
5 Interface of neutral wire
6 Fuse
3 7 Interface of live wire
8 Needle stand for jumper cap
2 12 9 Auto button
1 10 up&down swing interface
13 11 Left&right swing interface
12
14 Interface of ambient temperature
13
sensor
Interface of tube temperature
14
sensor
15 15 Display interface
Bottom View
Service Manual
Outdoor Unit
● Top view
1 2 3 4 5 6
8
9
10
11
12
13
15 14
No. Name No. Name No. Name

1 High-frequency transformer T1 6 High pressure protection terminal HPP1 11 Terminal of neutral wire
Overload protection terminal of
2 7 Terminal of 4-way valve 12 Protective tube FU101
compressor OVC-COMP
3 Terminal of temp sensor CN2 8 Electric heater band of chassis HEAT2-L 13 Terminal of ground wire
High pressure protection terminal Electric heater band of compressor
4 9 14 Choke L 101 and L102
HPP HEAT1-L
Electronic expansion valve terminal Terminal of outdoor fan
5 10 Terminal of live wire 15
EV OFAN-DC
● Bottom view
Service Manual
6. Function and Control

6.1 Remote Controller Introduction
1 ON/OFF button
2 MODE button
3 FAN button
4 SWING button
1 5 TURBO button
3
2
6 ▲/ button
▲
5
4
6 7 SLEEP button
7
8 8 TEMP button
9
11 10 9 WIFI button
10 LIGHT button
12
11 CLOCK button
TIMER ON / TIMER OFF

12
button
Introduction for icons on display screen
I feel Set fan speed

Operation mode Send signal
Turbo mode
Auto mode
8 heating function
Cool mode
Set temperature
Dry mode
WiFi function
Fan mode
Heat mode Set time
TIMER ON /
Clock TIMER OFF
Sleep mode Child lock
Light Up & down swing
Temp. display type
:Set temp. :Indoor
Temp. display ambient temp.
type
:Outdoor ambient temp.
Introduction for buttons on remote controller

Note:
● This is a general use remote controller, it could be used for the air conditioners with multifunction; For some function,
which the model doesn't have, if press the corresponding button on the remote controller that the unit will keep the
original running status.
● After putting through the power, the air conditioner will give out a sound. Operation indicator " " is ON (red indicator,
the colour is different for different models). After that, you can operate the air conditioner by using remote controller.
● Under on status, pressing the button on the remote controller, the signal icon " " on the display of remote controller
will blink once and the air conditioner will give out a “de” sound, which means the signal has been sent to the air
conditioner.
● Under off status, set temperature and clock icon will be displayed on the display of remote controller (If timer on, timer
off and light functions are set, the corresponding icons will be displayed on the display of remote controller at the same
time); Under on status, the display will show the corresponding set function icons.
Service Manual
1. ON/OFF button
Press this button to turn on the unit. Press this button again to turn off the unit.
2. MODE button
Press this button to select your required operation mode.
AUTO COOL DRY FAN HEAT
● When selecting auto mode, air conditioner will operate automatically according to ex-factory setting. Set temperature can’t be adjusted and
will not be displayed as well. Press "FAN" button can adjust fan speed. Press "SWING" button can adjust fan blowing angle.
● After selecting cool mode, air conditioner will operate under cool mode. Cool indicator on indoor unit is ON(This indicator is not available for
some models). Press "▲" or " " button to adjust set temperature. Press "FAN" button to adjust fan speed. Press "SWING" button to adjust fan
blowing angle.
● When selecting dry mode, the air conditioner operates at low speed under dry mode. Dry indicator on indoor unit is ON(This indicator is not
available for some models). Under dry mode, fan speed can’t be adjusted. Press "SWING" button to adjust fan blowing angle.
● When selecting fan mode, the air conditioner will only blow fan, no cooling and no heating. Press "FAN" button to adjust fan speed. Press
"SWING" button to adjust fan blowing angle.
● When selecting heating mode, the air conditioner operates under heat mode. Heat indicator on indoor unit is ON(This indicator is not
available for some models).Press "▲" or " " button to adjust set temperature. Press "FAN" button to adjust fan speed. Press "SWING" button
to adjust fan blowing angle. (Cooling only unit won’t receive heating mode signal. If setting heat mode with remote controller, press ON/OFF
button can’t start up the unit).
Note:
● For preventing cold air, after starting up heating mode, indoor unit will delay 1~5 minutes to blow air (actual delay time is depend on indoor
ambient temperature).
● Set temperature range from remote controller: 16~30 ; Fan speed: auto, low speed, medium speed, high speed.
3. FAN button
Pressing this button can set fan speed circularly as: auto (AUTO), low( ) ,medium( ), high( ).
Auto
Note:
● Under AUTO speed, air conditioner will select proper fan speed automatically according to ex-factory setting.
● Fan speed under dry mode is low speed.
● X-FAN function:Hold fan speed button for 2s in COOL or DRY mode, the icon “ ” is displayed and the indoor fan will continue operation
for a few minutes in order to dry the indoor unit even though you have turned off the unit. After energization, X-FAN OFF is defaulted. X-FAN
is not available in AUTO, FAN or HEAT mode.
This function indicates that moisture on evaporator of indoor unit will be blowed after the unit is stopped to avoid mould.
●Having set X-FAN function on:After turning off the unit by pressing ON/OFF button indoor fan will continue running for a few minutes.at low
speed.In this period,Hold fan speed button for 2s to stop indoor fan directly.
●Having set X-FAN function off: After turning off the unit by pressing ON/OFF button, the complete unit will be off directly.
4. SWING button
Press this button can select up&down swing angle. Fan blow angle can be selected circularly as below:
no display
(horizontal louvers stops at current position)
● When selecting " ", air conditioner is blowing fan automatically. Horizontal louver will automatically swing up & down at maximum angle.
● When selecting "
● When selecting "
● Hold " "button above 2s to set your required swing angle. When reaching your required angle, release the button.
Note:
●" " may not be available. When air conditioner receives this signal, the air conditioner will blow fan automatically.
5. TURBO button
Under COOL or HEAT mode, press this button to turn to quick COOL or quick HEAT mode. " " icon is displayed on remote controller.
Press this button again to exit turbo function and " " icon will disappear.
Service Manual
6. ▲/ button
▲
● Press "▲" or " " button once increase or decrease set temperature 1 (1°F) . Holding "▲" or " " button, 2s later, set temperature on
▲ ▲
remote controller will change quickly. On releasing button after setting is finished, temperature indicator on indoor unit will change
accordingly. (Temperature can’t be adjusted under auto mode)
● When setting TIMER ON, TIMER OFF or CLOCK, press "▲" or " " button to adjust time. (Refer to CLOCK, TIMER ON, TIMER OFF
▲
buttons)
7. SLEEP button
Under COOL, HEAT or DRY mode, press this button to start up sleep function. " " icon is displayed on remote controller. Press this button
again to cancel sleep function and " " icon will disappear.
8. TEMP button
By pressing this button, you can see indoor set temperature, indoor ambient temperature or outdoor ambient temperature on indoor units
display. The setting on remote controlleris selected circularly as below:
no display
● When selecting " " or no display with remote controller, temperature indicator on indoor unit displays set temperature.
● When selecting " " with remote controller, temperature indicator on indoor unit displays indoor ambient temperature.
● When selecting " " with remote controller, temperature indicator on indoor unit displays outdoor ambient temperature.
Note:
● Outdoor temperature display is not available for some models. At that time, indoor unit receives " "signal, while it displays indoor set
temperature.
● Its defaulted to display set temperature when turning on the unit.There is no display in the remote controller.
● Only for the models whose indoor unit has dual-8 display.
● When selecting displaying of indoor or outdoor ambient temperature, indoor temperature indicator displays corresponding temperature and
9. WIFI button
Press " WiFi " button to turn on or turn off WiFi function. When WiFi function is turned on, the " WiFi " icon will be displayed on remote
controller; Under status of remote controller off, press "MODE" and " WiFi " buttons simultaneously for 1s,WiFi modulewill restore to factory
default setting.
10. LIGHT button
Press this button to turn off display light on indoor unit. " " icon on remote controller disappears. Press this button again to turn on
display light. " " icon is displayed.
11. CLOCK button
Press this button to set clock time. " " icon on remote controller will blink. Press "▲" or " " button within 5s to set clock time. Each
▲
pressing of "▲" or " " button, clock time will increase or decrease 1 minute. If hold "▲" or " " button, 2s later, time will change quickly.
▲ ▲
" icon stops blinking.

Note:
● Clock time adopts 24-hour mode.
● The interval between two operation cant exceeds 5s. Otherwise, remote controller will quit setting status. Operation for TIMER ON/TIMER
OFF is the same.
12. TIMER ON / TIMER OFF button

● TIMER ON button
"TIMER ON" button can set the time for timer on. After pressing this button, " " icon disappears and the word "ON" on remote controller
blinks. Press "▲" or " "button to adjust TIMER ON setting. After each pressing "▲" or " " button, TIMER ON setting will increase or
▲ ▲
decrease 1min. Hold "▲" or " " button, 2s later, the time will change quickly until reaching your required time. Press "TIMER ON" to
▲
" icon resumes displaying. Cancel TIMER ON: Under the condition that TIMER ON is
started up, press "TIMER ON" button to cancel it.
● TIMER OFF button
"TIMER OFF" button can set the time for timer off. After pressing this button," " icon disappears and the word "OFF" on remote
controller blinks. Press "▲" or " " button to adjust TIMER OFF setting. After each pressing "▲" or " " button,
▲ ▲
TIMER OFF setting will increase or decrease 1min. Hold "▲" or " " button, 2s later, the time will change quickly until reaching your
▲
required time. Press "TIMER OFF" word "OFF" will stop blinking. " " icon resumes displaying. Cancel TIMER OFF. Under the condition
that TIMER OFF is started up, press "TIMER OFF" button to cancel it.
Service Manual
Note:
● Under on and off status, you can set TIMER OFF or TIMER ON simultaneously.
● Before setting TIMER ON or TIMER OFF, please adjust the clock time.
● After starting up TIMER ON or TIMER OFF, set the constant circulating valid. After that, air conditioner will be turned on or turned off
according to setting time. ON/OFF button has no effect on setting. If you dont need this function, please use remote controller to cancel it.
Function introduction for combination buttons

1. Energy-saving function
Under cooling mode, press "TEMP" and " CLOCK" buttons simultaneously to start up or turn off energy-saving function. When energy-saving
function is started up, "SE" will be shown on remote controller, and air conditioner will adjust the set temperature automatically according to
ex-factory setting to reach to the best energy-saving effect. Press "TEMP" and "CLOCK"buttons simultaneously again to exit energy-saving
function.
Note:
● Under energy-saving function, fan speed is defaulted at auto speed and it cant be adjusted.
● Under energy-saving function, set temperature cant be adjusted. Press "TURBO" button and the remote controller wont send signal.
● Sleep function and energy-saving function cant operate at the same time. If energy-saving function has been set under cooling mode,
press sleep button will cancel energy-saving function. If sleep function has been set under cooling mode, start up the energy-saving
function will cancel sleep function.
2. 8 heating function
Under heating mode, press "TEMP" and "CLOCK" buttons simultaneously to start up or turn off 8 heating function. When this function is
started up, " " and "8 " will be shown on remote controller, and the air conditioner keep the heating status at 8 . Press "TEMP" and
"CLOCK" buttons simultaneously again to exit 8 heating function.
Note:
● Under 8 heating function, fan speed is defaulted at auto speed and it cant be adjusted.
● Under 8 heating function, set temperature cant be adjusted. Press "TURBO" button and the remote controller wont send signal.
● Sleep function and 8 heating function cant operate at the same time. If 8 heating function has been set under cooling mode, press
sleep button will cancel 8 heating function. If sleep function has been set under cooling mode, start up the 8 heating function will
cancel sleep function.
● Under temperature display, the remote controller will display 46 heating.
3. Child lock function

Press "▲" and " " simultaneously to turn on or turn off child lock function. When child lock function is on, " " icon is displayed on remote
▲
controller. If you operate the remote controller, the " " icon will blink three times without sending signal to the unit.
4. Temperature display switchover function

Under OFF status, press " " and "MODE" buttons simultaneously to switch temperature display between and .
▲
5. I FELL Function
Press "▲" and "MODE" buttons simultaneously to start I FEEL function and " " will be displayed on the remote controller. After this function
is set, the remote controller will send the detected ambient temperature to the controller and the unitwill automatically adjust the indoor
temperature according to the detected tempera-ture. Press this two buttons simultaneously again to close I FEEL function and " " will
disappear.
● Please put the remote controller near user when this function is set. Do not put the remote controller near the object of high temperature
or low temperature in order to avoid detecting inaccurate ambient temperature.When I FEEL function is turned on, the remote controller
should be put within the area where indoor unit can receive the signal sent by the remote controller.
If “H1” is displayed on the remote controller while it’s not operated by the professional person/after-sales person, it belongs to the
misoperation.
Please operate it as below to cancel it.Under the OFF status of remote controller, hold the MODE button for 5s to cancel “H1” display.
Note:
● If remote controller displays “H1”, it belongs to the normal function reminder. If the unit is defrosting under heating mode, it operates
according to H1 defrosting mode. “H1” won’t be displayed on the panel of indoor unit;
● Once you set H1 mode, if you turn off unit by remote controller, H1 will display 3 times on the remote controller and then disappear;
● Also, when you set H1 mode, when you change to heating mode, H1 will display 3 times on the remote controller and then disappear.
Operation guide
1. After putting through the power, press "ON/OFF" button on remote controller to turn on the air conditioner.
2. Press "MODE" button to select your required mode: AUTO, COOL, DRY, FAN, HEAT.
3. Press "▲" or " " button to set your required temperature. (Temperature cant be adjusted under auto mode).
▲
4. Press "FAN" button to set your required fan speed: auto, low, medium and high speed.
5. Press "SWING" button to select fan blowing angle.
Service Manual
Replacement of batteries in remote controller
1. Press the back side of remote controller marked with " signal sender battery
out the cover of battery box along the arrow direction.
2. Replace two 7# (AAA 1.5V) dry batteries, and make sure the position of "+" polar and "-" polar reinstall
are correct.
3. Reinstall the cover of battery box. remove
Note:
Cover of battery box
● During operation, point the remote control signal sender at the receiving window on indoor unit.
● The distance between signal sender and receiving window should be no more than 8m, and there should be no obstacles between them.
indoor unit during operation.

● Replace new batteries of the same model when replacement is required.
● When you dont use remote controller for a long time, please take out the batteries.
● If the display on remote controller is fuzzy or theres no display, please replace batteries.
Service Manual
6.2 Ewpe Smart App Operation Manual
Control Flow Chart
Internet
Cloud
intelligent Home Wi-Fi Cellular/

home Other Wi-FI
appliances
Home wireless router

Home Wi-Fi
APP
Operating Systems
Requirement for User's smart phone:
iOS system Android system

Support iOS7.0 and Support Android 4.4 and
above version above version
Download and installation
App Download Linkage
Scan the QR code or search "Ewpe Smart" in the application market to download and install it. When "Ewpe Smart" App is installed,
register the account and add the device to achieve long-distance control and LAN control of smart home appliances.
For more information, please refer to "Help" in App.
Service Manual
6.3 Brief Description of Modes and Functions

1. Temperature Parameters
Indoor preset temperature(Tpreset)
Indoor ambient temperature (Tamb.)
2. Basic Functions
Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory functionis
available, for the first energization, if the compressor is at stop before de-energization, the compressor will be started withouta 3-minute
lag; if the compressor is in operation before de-energization, the compressor will be started with a 3-minute lag; andonce started, the
compressor will not be stopped within 6 minutes regardless of changes in room temperature;
(1) Cooling Mode
① Working conditions and process of cooling
When Tamb. ≥ Tpreset, the unit will enter cooling operation, in which case the indoor fan, the outdoor fan and the compressor willwork and
the indoor fan will run at preset speed.
When Tamb.≤Tpreset+28.4°F, the compressor will stop, the outdoor fan will stop with a time lag of 60s, and the indoor fan will run atpreset
speed.
When Tpreset+28.4°F < Tamb.< Tpreset, the unit will remain at its previous state.
Under this mode, the four-way valve will be de-energized and temperature can be set within a range from 61°F~86°F. If the compressor is
shut down for some reason, the indoor fan and the swing device will operate at original state.
Tamb. Start cooling

Tpreset
Original working state
Tpreset +3˚F
Stop cooling
≥ 6 min. ≥ 3 min. ≥ 6 min.
Compressor
Outdoor fan
Indoor fan Set fan speed
② Protection Run Stop

Antifreeze protection
Under cooling and dehumidifying mode, 6 minutes after the compressor is started:
If Tevap ≤ 35.6°F, the compressor will operate at reduced frequency.
If Tevap ≤ 30.2°F is detected for durative 3 minutes, the compressor will stop, and after 60 seconds, the outdoor fan will stop;and under
cooling mode, the indoor fan and the swing motor will remain at the original state.
If Tevap. ≥ 42.8°F and the compressor has remained at OFF for at least 3 minutes, the compressor will resume its original operation state.
Total current up and frequency down protection
If Itotal ≤ 16A, frequency rise will be allowed; if Itotal ≥ 17A, frequency rise will not be allowed; if Itotal ≥ 18A, the compressor will run at reduced
frequency; and if Itotal ≥ 20A, the compressor will stop and the outdoor fan will stop with a time lag of 60s.
(2) Dehumidifying Mode
① Working conditions and process of dehumidifying
If Tamb. > Tpreset, the unit will enter cooling and dehumidifying mode, in which case the compressor and the outdoor fan will operate and
the indoor fan will run at low speed.
If Tpreset+28.4°F ≤ Tamb. ≤ Tpreset the compressor remains at its original operation state.
If Tamb.< Tpreset , the compressor will stop, the outdoor fan will stop with a time lag of 60s, and the indoor fan will
operate at low speed.
② Protection
Protection is the same as that under the cooling mode.
(3) Heating Mode
① Working conditions and process of heating
If Tamb. ≤ Tpreset+35.6°F(Tindoor ambient≤ Tsetting + 2 ℃ , start with heating mode),the unit enters heating mode, in which case the four-way
valve, the compressor and the outdoor fan will operate simultaneously, and the indoor fan will run at preset speed in the condition of preset
cold air prevention.
If Tamb. ≥ Tpreset+37.4°F(Tindoor ambient ≥Tsetting+3℃ , it stops when reaches temperature point), the compressor will stop, the outdoor fan will
stop with a time lag of 60s, and the indoor fan will stop after 60-second blow at low speed.
If Tpreset < Tamb.<Tpreset+37.4°F(Tsetting ＜ Tindoor ambient ＜ Tsetting+3℃ , maintain heating mode), the unit will maintain its original operating
status.
Under this mode, the four-way valve is energized and temperature can be set within a range of 61°F~86°F. The operatingsymbol, the
heating symbol and preset temperature are revealed on the display.
② Condition and process of defrost
Service Manual
When duration of successive heating operation is more than 45 minutes, or accumulated heating time more than 90 minutes, andone of the
following conditions is reached, the unit will enter the defrost mode after 3 minutes.
a. Toutdoor amb. ≥ 41°F, Toutdoor pipe ≤ 28.4°F;
b. 28.4°F ≤ Toutdoor amb. ≤ 41°F,Toutdoor pipe - Tcompensation≤ 23°F
c. 23°F < Toutdoor amb. ≤ 28.4°F, Toutdoor pipe - Tcompensation≤ 17.6°F;
d. 14°F < Toutdoor amb. < 23°F, Toutdoor pipe- Tcompensation ≤ Toutdoor amb.+26.6°F;
e. Toutdoor amb. < 14°F, Toutdoor pipe- Tcompensation ≤ Toutdoor amb.+26.6°F;
After energization, when defrosting for the first time Tcompensation=0°F. If it is not the firstly time for defrosting, the Tcompensation is
determined by the Toutdoor pipe of last time quitting defrosting.
a.Toutdoor pipe > 35.6°F, Tcompensation=32°F; b. Toutdoor pipe ≤ 35.6°F, Tcompensation=33.8°F.
At that time, the indoor fan stops and the compressor stops, and after 60 seconds the outer fan will stop, and then after 30seconds, the four-
way valve will stop. After 30 seconds, the compressor is initiated for raising the frequency to defrost frequency.
When the compressor has operated under defrost mode for 10 minutes, or Touter tube ≥ 50°F, the compressor will be converted to 46Hz
operation.After 30 seconds, the compressor will stop. And after another 30 seconds, the four-way valve will be opened, and after60 seconds,
the compressor and the outer fan will be started, the indoor fan will run under preset cold air prevention conditions,and H1 will be displayed
at temperature display area on the display panel. Defrost frequency is 70 Hz.
3.Protection
Cold air prevention
The unit is started under heating mode (the compressor is ON):
① In the case of Tindoor amb. < 75°F: if T tube ≤ 104°F and the indoor fan is at stop state, the indoor fan will begin to run at low speed witha
time lag of 2 minutes. Within 2 minutes, if T tube > 104°F, the indoor fan also will run at low speed; and after 1 minute operation atlow speed,
the indoor fan will be converted to operation at preset speed. Within 1 minute low speed operation or 2 minute non-operation, if T tube >
108°F, the fan will run at present speed.
② In the case of Tindoor amb. < 75°F: if Ttube ≤ 108°F, the indoor fan will run at low speed, and after one minute, the indoor fan will
beconverted to preset speed. Within 1 minute low speed operation, if Ttube > 104°F, the indoor fan will be converted to preset speed.Note:
Tindoor amb. indicated in ① and ② refers to, under initially heating mode, the indoor ambient temperature before the command to start the
compressor is performed according to the program, or after the unit is withdrawn from defrost, the indoor ambient temperature before the
defrost symbol is cleared.
Total current up and frequency down protection
If the total current Itotal ≤ 16A, frequency rise will be allowed; if Itotal ≥ 17A,frequency rise will not be allowed; if Itotal18A,the compressorwill run
at reduced frequency; and if Itotal20A, the compressor will stop and the outdoor fan will stop with a time lag of 60s.
(4) Fan Mode
Under the mode, the indoor fan will run at preset speed and the compressor, the outdoor fan, the four-way valve and the electricheater will
stop.
Under the mode, temperature can be set within a range of 61°F~86°F.
(5) AUTO Mode
① Working conditions and process of AUTO mode
Under AUTO mode, standard cooling temperature Tpreset is 77°F and standard heating temperature Tpreset is 68°F.
a. Once energized, if Tamb. ≤ 71.6°F, the unit will be started under heating mode; if 71.6°F < Tamb.< 78.8°F, the unit will run under fanmode
and the run indicator will be bright; and if Tamb. ≥ 78.8°F, the unit will be started under cooling mode.
b.Under AUTO mode,if Tamb. ≥ Tpreset +1.8ºF is detected,the unit will select to run under cooling mode,in which case implicit
presettemperature is 77°F; if Tamb. ≤ Tpreset-1.8°F, the compressor will stop, the outdoor fan will stop with a time lag of 1 minute,
andtheindoor fan will run at preset speed; and if Tpreset-1.8°F < Tamb. < Tpreset+1.8ºF, the unit will remain at its original state.
c.Under AUTO mode, if Tamb. ≤ Tpreset+3.6°F is detected, the unit will select to run under heating mode, in which case implicit preset
temperature is 64°F; if Tamb. ≥ Tpreset+9°F, the compressor will stop, the outdoor fan will stop with a time lag of 1 minute,and the indoor
fan will run under the mode of residue heat blowing; and if Tpreset+3.6°F < Tamb.< Tpreset+41°F, the unit will remainatits original state. The
cooling-only unit will run under fan mode.
d.Under AUTO mode, if 71.6°F < Tamb.< 78.8°F, the unit will remain at its original state.
② Protection
a. In cooling operation, protection is the same as that under the cooling mode;
b. In heating operation, protection is the same as that under the heating mode;
c. When ambient temperature changes, operation mode will be converted preferentially. Once started, the compressor willremain unchanged
for at least 6 minutes.
(6) Common Protection Functions and Fault Display under COOL, HEAT, DRY and AUTO Modes
① Overload protection
Ttube:measured temperature of outdoor heat exchanger under cooling mode; and measured temperature of indoor heat ex-changer under
heating mode.
1) Cooling overloada.
a. If Ttube ≤ 126°F, the unit will return to its original operation state.
b. If Ttube ≥ 131°F, frequency rise is not allowed.
Service Manual
c. If Ttube ≥ 136°F, the compressor will run at reduced frequency.

d. If Ttube ≥ 144°F, the compressor will stop and the indoor fan will run at preset speed.
2) Heating overload
a. If Ttube ≤ 126°F, the unit will return to its original operation state.
b. If Ttube ≥ 131°F, frequency rise is not allowed.
c. If Ttube ≥ 136°F, the compressor will run at reduced frequency.
d. If Ttube ≥ 144°F,the compressor will stop and the indoor fan will blow residue heat and then stop.
② Exhaust temperature protection of compressor
If exhaust temperature ≥ 208°F, frequency is not allowed to rise.
If exhaust temperature ≥ 217°F, the compressor will run at reduced frequency.
If exhaust temperature ≥ 230°F, the compressor will stop.
If exhaust temperature ≤ 194°F, the compressor has stayed at stop for at least 3 minutes, the compressor will resume itsoperation.
③ Communication fault
If the unit fails to receive correct signals for durative 3 minutes, communication fault can be justified and the whole system will stop.
④ Module protection
Under module protection mode, the compressor will stop. When the compressor remains at stop for at least 3 minutes, thecompressor will
resume its operation. If module protection occurs six times in succession, the compressor will not be startedagain.
⑤ Overload protection
If temperature sensed by the overload sensor is over 239°F, the compressor will stop and the outdoor fan will stop with atime lag of 30
seconds. If temperature is below 203°F, the overload protection will be relieved.
If voltage on the DC bus is below 150V or over 420V, the compressor will stop and the outdoor fan will stop with a timelag of 30 seconds.
When voltage on the DC bus returns to its normal value and the compressor has stayed at stop for at least3 minutes, the compressor will
resume its operation.
⑥ Faults of temperature sensors
Designation of sensors Faults

The sensor is detected to be open-circuited or short-circuited for successive 5
Indoor ambient temperature
seconds
Indoor tube temperature
seconds
Outdoor ambient temperature
seconds
The sensor is detected to be open-circuited or short-circuited forsuccessive 30
Outdoor tube temperature
seconds, and no detection is performed within 10 minutesafter defrost begins.
After the compressor has operated for 3 minutes, the sensor is detectedto be
Exhaust
open-circuited or short-circuited for successive 30 seconds.
After the compressor has operated for 3 minutes, the sensor is detectedto be
Overload
open-circuited or short-circuited for successive 30 seconds.
Service Manual
Part Ⅱ : Installation and Maintenance

7. Notes for Installation and Maintenance
Safety Precautions: 10. If the power cord or connection wire is not long enough,
please get the specialized power cord or connection wire
Important! from the manufacture or distributor. Prohibit prolong the wire
by yourself.
Please read the safety precautions carefully before 11. For the air conditioner without plug, an air switch must
installation and maintenance. be installed in the circuit. The air switch should be all-pole
The following contents are very important for installation parting and the contact parting distance should be more than
and maintenance. 1/8 inch.
12. Make sure all wires and pipes are connected properly and
Please follow the instructions below. the valves are opened before energizing.
13. Check if there is electric leakage on the unit body. If yes,
●The installation or maintenance must accord with the please eliminate the electric leakage.
instructions. 14. Replace the fuse with a new one of the same specification
●Comply with all national electrical codes and local if it is burnt down; dont replace it with a cooper wire or
electrical codes. conducting wire.
●Pay attention to the warnings and cautions in this 15. If the unit is to be installed in a humid place, the circuit
manual. breaker must be installed.
●All installation and maintenance shall be performed by
distributor or qualified person.
●All electric work must be performed by a licensed Installation Safety Precautions:
technician according to local regulations and the
instructions given in this manual. 1. Select the installation location according to the require-
●Be caution during installation and maintenance. Prohibit ment of this manual.(See the requirements in installation
incorrect operation to prevent electric shock, casualty and part)
other accidents. 2. Handle unit transportation with care; the unit should not
be carried by only one person if it is more than 44.09lb.
3. When installing the indoor unit and outdoor unit, a suffi-
Warnings
cient fixing bolt must be installed; make sure the installation
support is firm.
4. Ware safety belt if the height of working is above 78 3/4
inch.
5. Use equipped components or appointed components dur-
Electrical Safety Precautions: ing installation.
6. Make sure no foreign objects are left in the unit after fin-
1. Cut off the power supply of air conditioner before ishing installation.
checking and maintenance.
2. The air condition must apply specialized circuit and Refrigerant Safety Precautions:
prohibit share the same circuit with other appliances.
3. The air conditioner should be installed in suitable 1. Avoid contact between refrigerant and fire as it generates
location and ensure the power plug is touchable. poisonous gas; Prohibit prolong the connection pipe by
4. Make sure each wiring terminal is connected firmly welding.
during installation and maintenance. 2. Apply specified refrigerant only. Never have it mixed with
5. Have the unit adequately grounded. The grounding wire any other refrigerant. Never have air remain in the refrigerant
cant be used for other purposes. line as it may lead to rupture or other hazards.
6. Must apply protective accessories such as protective 3. Make sure no refrigerant gas is leaking out when installation
boards, cable-cross loop and wire clip. is completed.
7. The live wire, neutral wire and grounding wire of power 4. If there is refrigerant leakage, please take sufficient measure
supply must be corresponding to the live wire, neutral to minimize the density of refrigerant.
wire and grounding wire of the air conditioner. 5. Never touch the refrigerant piping or compressor without
8. The power cord and power connection wires cant be wearing glove to avoid scald or frostbite.
pressed by hard objects.
9. If power cord or connection wire is broken, it must be Improper installation may lead to fire hazard, explosion,
replaced by a qualified person. electric shock or injury.
22 Installation and Maintenance

Service Manual
Safety Precautions for Installing and Relocating the Unit

To ensure safety, please be mindful of the following precautions.
Warnings
1. When installing or relocating the unit, be sure to keep the refrigerant circuit free from air or substances other than the
specified refrigerant.
Any presence of air or other foreign substance in the refrigerant circuit will cause system pressure rise or compressor rupture, resulting
in injury.
2.When installing or moving this unit, do not charge the refrigerant which is not comply with that on the nameplate or
unqualified refrigerant.
Otherwise, it may cause abnormal operation, wrong action, mechanical malfunction or even series safety accident.
3.When refrigerant needs to be recovered during relocating or repairing the unit, be sure that the unit is running in cooling
mode.Then, fully close the valve at high pressure side (liquid valve).About 30-40 seconds later, fully close the valve at low
pressure side (gas valve), immediately stop the unit and disconnect power. Please note that the time for refrigerant recovery
should not exceed 1 minute.
If refrigerant recovery takes too much time, air may be sucked in and cause pressure rise or compressor rupture, resulting in injury.
4.During refrigerant recovery, make sure that liquid valve and gas valve are fully closed and power is disconnected before
detaching the connection pipe.
If compressor starts running when stop valve is open and connection pipe is not yet connected, air will be sucked in and cause pressure
rise or compressor rupture, resulting in injury.
5.When installing the unit, make sure that connection pipe is securely connected before the compressor starts running.
If compressor starts running when stop valve is open and connection pipe is not yet connected, air will be sucked in and cause pressure
rise or compressor rupture, resulting in injury.
6.Prohibit installing the unit at the place where there may be leaked corrosive gas or flammable gas.
If there leaked gas around the unit, it may cause explosion and other accidents.
7.Do not use extension cords for electrical connections. If the electric wire is not long enough, please contact a local service
center authorized and ask for a proper electric wire.
Poor connections may lead to electric shock or fire.
8.Use the specified types of wires for electrical connections between the indoor and outdoor units. Firmly clamp the wires so
that their terminals receive no external stresses.
Electric wires with insufficient capacity, wrong wire connections and insecure wire terminals may cause electric shock or fire.
Installation and Maintenance 23

Service Manual
Main Tools for Installation and Maintenance

1. Level meter, measuring tape 2. Screw driver 3. Impact drill, drill head, electric drill
4. Electroprobe 5. Universal meter 6. Torque wrench, open-end wrench, inner

hexagon spanner
7. Electronic leakage detector 8. Vacuum pump 9. Pressure meter
10. Pipe pliers, pipe cutter 11. Pipe expander, pipe bender 12. Soldering appliance, refrigerant container

Service Manual
8. Installation
8.1 Installation Dimension Diagram
Space to the ceiling
At least 5 7/8 inch
Space to the wall

Space to the wall
At least 5 7/8 inch
At least 5 7/8 inch
n
Space to the floor

At least 98 7/16 inch
tio
uc
ch
str
8 in
ob
t 11
he
eas
ot
At l
et
ac
Sp
Space to the obstruction

At least 19 11/16 inch
n
ctio
s tru
ob
the
to
Sp ac
e inch
ac Sp 7/8
et 11
ot e ast
he
wa At l
At l
eas ll
t 11
7/8
inch
Drainage pipe
o
u cti h
str inc
ob 3/4 Sp
the t 7 8 ac
et
o le as At et
ot
pa
c At lea
st 1 he
S 91 ob
1/1 str
6 in uc
ch tio
n

Service Manual
Installation procedures
Start installation
Preparation before installation
Read the requirements select installation Prepare tools

for electric connection location
Select indoor unit Select outdoor unit

installation location installation location
Install wall-mounting Install the support of outdoor unit

frame, drill wall holes (select it according to the actual situation)
Connect pipes of indoor Fix outdoor unit

unit and drainage pipe
Connect wires of indoor unit Install drainage joint of outdoor unit

(only for cooling and heating unit)
Bind up pipes and

hang the indoor unit
Make the bound pipes pass

through the wall hole and then
connect outdoor unit
Connect pipes of outdoor unit
Connect wires of outdoor unit
Neaten the pipes
Vacuum pumping and leakage detection
Check after installation and test operation
Finish installation
Note: this flow is only for reference; please find the more detailed installation steps in this section.

Service Manual
8.2 Installation Parts-checking 8.4 Requirements for electric connection

1. Safety Precaution
No. Name No. Name
1 Indoor unit 8 Sealing gum (1) Must follow the electric safety regulations when installing
the unit.
2 Outdoor unit 9 Wrapping tape (2) According to the local safety regulations, use qualified
Support of outdoor power supply circuit and air switch.
3 Connection pipe 10
unit (3) Make sure the power supply matches with the requirement
4 Drainage pipe 11 Fixing screw of air conditioner. Unstable power supply or incorrect wiring
Wall-mounting Drainage plug(cooling may result in electric shock,fire hazard or malfunction. Please
5 12 install proper power supply cables before using the air
frame and heating unit) conditioner.
Connecting Owners manual,
6 13
cable(power cord) remote controller Air-conditioner Air switch capacity
7 Wall pipe
30K 30A
Note:
1.Please contact the local agent for installation. 36K 40A
2.Dont use unqualified power cord.
(4) Properly connect the live wire, neutral wire and grounding
8.3 Selection of Installation Location wire of power socket.
1. Basic Requirement: (5) Be sure to cut off the power supply before proceeding any
Installing the unit in the following places may cause work related to electricity and safety.
(6) Do not put through the power before finishing installation.
malfunction. If it is unavoidable, please consult the local dealer:
(7) If the supply cord is damaged,it must be replaced by the
(1) The place with strong heat sources, vapors, flammable or
manufacturer,its service agent or similarly qualified persons in
explosive gas, or volatile objects spread in the air. order to avoid a hazard.
(2) The place with high-frequency devices (such as welding (8) The temperature of refrigerant circuit will be high, please
machine, medical equipment). keep the interconnection cable away from the copper tube.
(3) The place near coast area. (9) The appliance shall be installed in accordance with national
(4) The place with oil or fumes in the air. wiring regulations.
(5) The place with sulfureted gas. (10)Installation must be performed in accordance with the
(6) Other places with special circumstances. requirement of NEC and CEC by authorized personnel only.
(7) Do not use the unit in the immediate surroundings of a
2. Grounding Requirement:
laundry a bath a shower or a swimming pool.
(1) The air conditioner is first class electric appliance. It must
2. Indoor Unit: be properly grounding with specialized grounding device
(1) There should be no obstruction near air inlet and air outlet. by a professional. Please make sure it is always grounded
effectively, otherwise it may cause electric shock.
(2) Select a location where the condensation water can be
(2) The yellow-green wire in air conditioner is grounding wire,
dispersed easily and wont affect other people. which cant be used for other purposes.
(3) Select a location which is convenient to connect the (3) The grounding resistance should comply with national
outdoor unit and near the power socket. electric safety regulations.
(4) Select a location which is out of reach for children. (4) The appliance must be positioned so that the plug is
accessible.
(5) The location should be able to withstand the weight of
(5) An all-pole disconnection switch having a contact separation
indoor unit and wont increase noise and vibration. of at least 1/8 inch in all poles should be connected in fixed
(6) The appliance must be installed 98 7/16 inch above floor. wiring.
(7) Dont install the indoor unit right above the electric (6) Including an air switch with suitable capacity, please note
appliance. the following table. Air switch should be included magnet
buckle and heating buckle function, it can protect the circuit-
(8) The appliance shall not be installed in the laundry.
short and overload. (Caution: please do not use the fuse only
for protect the circuit)
3. Outdoor Unit:
(1) Select a location where the noise and outflow air emitted by
the outdoor unit will not affect neighborhood. 8.5 Installation of Indoor Unit
(2) The location should be well ventilated and dry, in which
1. Choosing Installation Iocation
the outdoor unit wont be exposed directly to sunlight or strong
Recommend the installation location to the client and then
wind.
confirm it with the client.
(3) The location should be able to withstand the weight of
outdoor unit. 2. Install Wall-mounting Frame
(4) Make sure that the installation follows the requirement of (1) Hang the wall-mounting frame on the wall; adjust it in
installation dimension diagram. horizontal position with the level meter and then point out the
(5)Select a location which is out of reach for children and far screw fixing holes on the wall.
away from animals or plants.If it is unavoidable, please add (2) Drill the screw fixing holes on the wall with impact drill (the
fence for safety purpose. specification of drill head should be the same as the plastic
expansion particle) and then fill the plastic expansion particles

Service Manual
in the holes.
torque wrench.(As show in Fig.6)
(3) Fix the wall-mounting frame on the wall with tapping screws
(4) Wrap the indoor pipe and joint of connection pipe with
(ST4.2X25TA) and then check if the frame is firmly installed by
insulating pipe, and then wrap it with tape.(As show in Fig.7)
pulling the frame. If the plastic expansion particle is loose,
please drill another fixing hole nearby. Open-end
wrench
3. Install Wall-mounting Frame Union nut

(1) Choose the position of piping hole according to the direction Pipe joint Union nut Pipe
Torque wrench Pipe
of outlet pipe. The position of piping hole should be a little
lower than the wall-mounted frame.(As show in Fig.1) Indoor pipe
Wall Wall Fig.5 Fig.6

Mark on the middle of it Gradienter
Space Space
to the to the
wall 6 wall 6
inch inch
above above
Insulating pipe Fig.7

Left Right
Ф2 3/4inch Ф2 3/4inch Refer to the following table for wrench moment of force:
(Rear piping hole) Fig.1 (Rear piping hole)
Hex nut diameter(inch) Tightening torque(ft·Ibf)
(2) Open a piping hole with the diameter of Φ2 3/4inch on the
Φ1/4 11.10~14.75
selected outlet pipe position.In order to drain smoothly, slant
Φ3/8 20.12~29.50
the piping hole on the wall slightly downward to the outdoor
Φ1/2 33.19~40.56
side with the gradient of 5-10°.(As show in Fig.2)
Φ5/8 44.24~47.94
Indoor Outdoor Φ3/4 51.32~55.31
6. Install Drain Hose

Φ2 3/4inch (1) Connect the drain hose to the outlet pipe of indoor unit.(As
5-10° show in Fig.8)
Fig.2 (2) Bind the joint with tape.(As show in Fig.9)
Note:
(1) Pay attention to dust prevention and take relevant safety
measures when opening the hole. Drain hose
Outlet pipe
(2) The plastic expansion particles are not provided and should
be bought locally.
4. Outlet Pipe Tape
Outlet Drain hose
(1) The pipe can be led out in the direction of right, rear right, pipe Fig.9
Fig.8
left or rear left.(As show in Fig.3)
(2) When selecting leading out the pipe from left or right, please
Note:
cut off the corresponding hole on the bottom case.(As show in
Fig.4) (1) Add insulating pipe in the indoor drain hose in order to
prevent condensation.
(2) The plastic expansion particles are not provided.
(As show in Fig.10)
Left Rear left

Drain hose
Fig.3 Rear right
Right
Left Right
Insulating pipe
Fig.10
Cut off 7. Connect Wire of Indoor Unit

the hole Fig.4 (1) Open the panel, remove the screw on the wiring cover and
then take down the cover.(As show in Fig.11)
5. Connect the Pipe of Indoor Unit Screw
(1) Aim the pipe joint at the corresponding bellmouth.(As show Panel
in Fig.5)
(2) Pretightening the union nut with hand.
(3) Adjust the torque force by referring to the following sheet.
Place the open-end wrench on the pipe joint and place the Fig.11
Wiring cover
torque wrench on the union nut. Tighten the union nut with

Service Manual
(2) Fix the wire crossing board on connection wire sleeve at 8. Bind up Pipe
the bottom case; let the connection wire sleeve go through the (1) Bind up the connection pipe, power cord and drain hose
wire crossing hole at the back of indoor unit, and then pull it out with the band.(As show in Fig.14)
from the front.(As show in Fig.12) (2) Reserve a certain length of drain hose and power cord
for installation when binding them. When binding to a certain
degree, separate the indoor power and then separate the drain
hose.(As show in Fig.15)
(3) Bind them evenly.
(4) The liquid pipe and gas pipe should be bound separately at
connection wire sleeve the end.
Fig.12
Indoor and
(3) Remove the wire clip; connect the power connection wire outdoor power cord
to the wiring terminal according to the color; tighten the screw Indoor unit Gas
pipe
and then fix the power connection wire with wire clip.(As show
in Fig.13)
Liquid
Fig.14 Band pipe
N(1) 2 3 Drain hose
white black red green
(blue) (brown) (yellow-
green)
Connection pipe Drain hose

Band
Fig.13 Outdoor unit connection
Note: the wiring board is for reference only,please refer to the actual one.
(4) Put wiring cover back and then tighten the screw. Fig.15
(5) Close the panel. Indoor power cord
(6) Install the Conduit assy.
a. Fix the conduit assy on the conduit board and then let the Note:
connection wire between indoor unit and outdoor unit go
(1) The power cord and control wire cant be crossed or
through the conduit.
winding.
b. Fix the conduit assy on the chassis with 3 screws.
(2) The drain hose should be bound at the bottom.
● Conduit assy consists of conduit, conduit connector and
lock nut.(Not the standard part, which should be purchased by
9. Hang the Indoor Unit
customer.)
(1) Put the bound pipes in the wall pipe and then make them
● The length of conduit can be calculated according to the
pass through the wall hole.
length of connection wire.
(2) Hang the indoor unit on the wall-mounting frame.
(3) Stuff the gap between pipes and wall hole with sealing gum.
(4) Fix the wall pipe.(As show in Fig.16)
(5) Check if the indoor unit is installed firmly and closed to the
wall.(As show in Fig.17)
connection wire Conduit connector

sleeve Lock nut Indoor Outdoor
Cable Cross Plate
Wall pipe Fig.17
Conduit
Sealing gum
Upper hook
Note:
(1) All wires of indoor unit and outdoor unit should be
connected by a professional.
(2) If the length of power connection wire is insufficient, please
contact the supplier for a new one. Avoid extending the wire by Fig.16
yourself. Lower hook of
wall-mounting frame
(3) For the air conditioner with plug, the plug should be
reachable after finishing installation. Note:
(4) For the air conditioner without plug, an air switch must be Do not bend the drain hose too excessively in order to prevent
installed in the line. The air switch should be all-pole parting blocking.
and the contact parting distance should be more than 1/8inch.

Service Manual
8.6 Installation of Outdoor Unit Hex nut diameter(inch) Tightening torque(ft·Ibf)

Φ1/4 11.10~14.75
1. Fix the Support of Outdoor Unit(Select it according to
Φ3/8 20.12~29.50
the actual installation situation)
Φ1/2 33.19~40.56
(1) Select installation location according to the house structure. Φ5/8 44.24~47.94
(2) Fix the support of outdoor unit on the selected location with Φ3/4 51.32~55.31
expansion screws.
5. Connect Outdoor Electric Wire
Note:
(1) Remove the handle from the outdoor unit.
(1) Take sufficient protective measures when installing the (2) Fasten the power supply cord and the connection cord to
outdoor unit. the retaining plate using the lock nut.(open the knock out holes
(2) Make sure the support can withstand at least four times the if necessary)
unit weight. (3) Connect the power supply cord and the connection cord to
(3) The outdoor unit should be installed at least 1 11/64 inch terminal.
above the floor in order to install drain joint.(As show in Fig.18) (4) Fasten the power supply cord and connection cord with cord
clamp.
(4) For the unit with cooling capacity of 2300W~5000W, 6
(5) Install the handle.
expansion screws are needed; for the unit with cooling capacity
The screws are packed with the terminal board.
of 6000W~8000W, 8 expansion screws are needed; for the (6) Fix the power connection wire and signal control wire with
unit with cooling capacity of 10000W~16000W, 10 expansion wire clip (only for cooling and heating unit).
screws are needed.
All models except:

GWH36QF-D3DNB2I/O GWH30QF-D3DNB2I/O
Fig.18
N(1) 2 3 L1 L2 G
green white red black white green
lock nut (yellow- (blue) black (brown) (brown) (blue) (yellow-
green) green)
Drain vent Chassis
Outdoor drain joint L1 L2
Drain hose Indoor unit connection POWER
At least 1 11/64 inch above Finish
Note: the wiring board is for reference only,
Fig.19
conduit
the floor please refer to the actual one.
2. Install Drain Joint(Only for cooling and heating unit) Fig.23

(1) Connect the outdoor drain joint into the hole on the chassis. Note:
(2) Connect the drain hose into the drain vent.
(1) After tightening the screw, pull the power cord slightly to
(As show in Fig.19) check if it is firm.
(2) Never cut the power connection wire to prolong or shorten
3. Fix Outdoor Unit
the distance.
(1) Place the outdoor unit on the support.
(2) Fix the foot holes of outdoor unit with bolts. 6. Neaten the Pipes
(As show in Fig.20) (1) The pipes should be placed along the wall, bent reasonably
and hidden possibly. Min. semidiameter of bending the pipe is 4
Foot holes inch.
(2) If the outdoor unit is higher than the wall hole, you must set
Handle
a U-shaped curve in the pipe before pipe goes into the room,
in order to prevent rain from getting into the room.(As show in
Valve cover Fig.24)
Foot holes
Fig.20 Fig.22
4. Connect Indoor and Outdoor Pipes The drain hos
can't raise
(1) Remove the screw cap of valve and aim the pipe joint at the Wall upwards
bellmouth of pipe.(As show in Fig.21)
(2) Pretightening the union nut with hand..(As show in Fig.22)
U-shaped curve
Drain hose
Liquid pipe Pipe joint
Liquid gas pipe
valve Fig.24 Fig.25
Union nut
gas valve Note:
Fig.21 (1) The through-wall height of drain hose shouldnt be higher
than the outlet pipe hole of indoor unit.(As show in Fig.25)
(3) Tighten the union nut with torque wrench by referring to the (2) Slant the drain hose slightly downwards. The drain hose
sheet below. cant be curved, raised and fluctuant, etc.(As show in Fig.26)

Service Manual
(3) The water outlet cant be placed in water in order to drain

8.8 Check after Installation and Test
smoothly.(As show in Fig.27)
Operation
1. Check after Installation
Check according to the following requirement after finishing
installation.
The drain hose can't be fluctuant
NO. Items to be checked Possible malfunction

Has the unit been The unit may drop, shake or
The water outlet 1
can't be placed installed firmly? emit noise.
The drain hose
can't be fluctuant
in water Have you done the It may cause insufficient cooling
The water 2
outlet can't be refrigerant leakage test? (heating) capacity.
fluctuant Fig.27
Is heat insulation of It may cause condensation and
3
pipeline sufficient? water dripping.
Fig.26
It may cause condensation and
4 Is water drained well?
water dripping.
Is the voltage of power
8.7 Vacuum Pumping and Leak Detection supply according to the It may cause malfunction or
5
1. Use Vacuum Pump voltage marked on the damage the parts.
(1) Remove the valve caps on the liquid valve and gas valve nameplate?
and the nut of refrigerant charging vent. Is electric wiring and
It may cause malfunction or
(2) Connect the charging hose of piezometer to the refrigerant 6 pipeline installed
damage the parts.
charging vent of gas valve and then connect the other charging correctly?
hose to the vacuum pump. Is the unit grounded
7 It may cause electric leakage.
(3) Open the piezometer completely and operate for 10-15min securely?
Does the power cord It may cause malfunction or
to check if the pressure of piezometer remains in -0.1MPa. 8
follow the specification? damage the parts.
(4) Close the vacuum pump and maintain this status for 1-2min
Is there any obstruction It may cause insufficient cooling
to check if the pressure of piezometer remains in -0.1MPa. If 9
in air inlet and air outlet? (heating)capacity.
the pressure decreases, there may be leakage.
The dust and
(5) Remove the piezometer, open the valve core of liquid valve
sundries caused It may cause malfunction or
and gas valve completely with inner hexagon spanner. 10
during installation are damaging the parts.
(6) Tighten the screw caps of valves and refrigerant charging
removed?
vent.(As show in Fig.28)
The gas valve and liquid
(7) Reinstall the handle. It may cause insufficient cooling
11 valve of connection pipe
(heating) capacity.
Liquid valve Piezometer are open completely?
Is the inlet and outlet It may cause insufficient
Lo Hi
Gas valve 12 of piping hole been cooling(heating) capacity or

Refrigerant charging Valve cap covered? waster eletricity.
vent
Nut of refrigerant
2. Test Operation
Charging vent
(1) Preparation of test operation
Vacuum pump ● The client approves the air conditioner installation.
● Specify the important notes for air conditioner to the client.
Inner hexagon
spanner (2) Method of test operation
● Put through the power, press ON/OFF button on the remote
controller to start operation.
Close
● Press MODE button to select AUTO, COOL, DRY, FAN and
Fig.28 Open
HEAT to check whether the operation is normal or not.
● If the ambient temperature is lower than 16ºC(61ºF), the air
2. Leakage Detection conditioner cant start cooling.
(1) With leakage detector:
Check if there is leakage with leakage detector.
(2) With soap water:
If leakage detector is not available, please use soap water for
leakage detection. Apply soap water at the suspected position
and keep the soap water for more than 3min. If there are air
bubbles coming out of this position, theres a leakage.

Service Manual
9. Troubleshooting
9.1 Flashing LED of Indoor/Outdoor Unit and Primary Judgement
Display Method of Indoor Unit
Indicator Display (during

Malfunction
NO. Dual-8 blinking, ON 0.5s and OFF A/C status Possible Causes
Name
Code 0.5s)
Display
Operation Cool Heating
Indicator Indicator Indicator
During cooling and drying Possible reasons:

High operation, except indoor 1. Refrigerant was superabundant;
OFF 3s
pressure fan operates, all loads stop 2. Poor heat exchange (including
1 E1 and blink
protection of operation.
once
system During heating operation, the and bad radiating environment );
complete unit stops. Ambient temperature is too high.
During cooling and drying
OFF 3S 1. Poor air-return in indoor unit;
Antifreezing operation, compressor and
2 E2 and blink 2. Fan speed is abnormal;
protection outdoor fan stop while indoor
twice 3. Evaporator is dirty.
fan operates.
1.In defect of refrigerant;
In defect of The Dual-8 Code Display will 2.Indoor evaporator temperature
3 refrigerant F0 show F0 and the complete unit sensor works abnormally;
stops. 3.The unit has been plugged up
somewhere.
High During cooling and drying
discharge OFF 3S operation, compressor and Please refer to the malfunction
4 temperature E4 and blink outdoor fan stop while indoor analysis (discharge protection,
protection of 4 times fan operates. During heating overload).
compressor operation, all loads stop.
OFF 3S 1. Supply voltage is unstable;
operation, compressor and
Overcurrent and blink 2. Supply voltage is too low and
5 E5 outdoor fan stop while indoor
protection 5 load is too high;
fan operates. During heating
times 3. Evaporator is dirty.
operation, all loads stop.
During cooling operation,
OFF 3S
Communi- compressor stops while
Refer to the corresponding
6 cation E6 indoor fan motor operates.
malfunction analysis.
Malfunction During heating operation, the
times
complete unit stops.
During cooling operation:

High OFF 3S
compressor will stop while Refer to the malfunction analysis
temperature and blink
7 E8 indoor fan will operate. (overload, high temperature
resistant 8
During heating operation, the resistant).
protection times
complete unit stops.

OFF 3S operation, compressor will stop
EEPROM Replace outdoor control panel AP1
8 EE and blink while indoor fan will operate;
malfunction
15 times During heating operation, the
complete unit will stop
Discharging after the complete unit

Limit/ is de-energized for 20mins, check
decrease whether the thermal grease on
OFF 3S OFF 3S All loads operate normally,
frequency IPM Module of outdoor control
9 EU and blink and blink while
due to high
6 times 6 times operation frequency for
temperature the radiator is inserted tightly.
compressor is decreased
of module If its no use, please replace control
panel AP1.
1. No jumper cap insert on
mainboard.
Malfunction OFF 3S Wireless remote receiver and
2. Incorrect insert of jumper cap.
10 protection of C5 and blink button are effective, but can
3. Jumper cap damaged.
jumper cap 15 times not dispose the related
4. Abnormal detecting circuit of
command
mainboard.

Service Manual

Malfunction
Name
Code 0.5s)
Display
When the outdoor unit receive

OFF 3S signal of Gathering refrigerant
Gathering
11 Fo and blink ,the system will be forced to Nominal cooling mode
refrigerant
1 times run under cooling mode for
gathering refrigerant
1. Loosening or bad contact of
indoor ambient temp. sensor and
Indoor During cooling and drying
mainboard terminal.
ambient operation, indoor unit operates
OFF 3S 2. Components in mainboard fell
temperature while other loads will stop;
12 F1 and blink down leads short circuit.
sensor is during heating operation,
once 3. Indoor ambient temp. sensor
open/short the complete unit will stop
damaged.(check with sensor
circuited operation.
resistance value chart)
4. Mainboard damaged.
1. Loosening or bad contact of
Indoor
AC stops operation once evaporator temp. sensor and
Indoor
reaches the setting mainboard terminal.
evaporator 2. Components on the mainboard
OFF 3S temperature. Cooling, drying:
temperature fall
13 F2 and blink internal fan motor stops
sensor is down leads short circuit.
twice operation while other loads
open/short 3. Indoor evaporator temp. sensor
stop operation; heating: AC damaged.(check temp. sensor
circuited
stop operation value
chart for testing)
4. Mainboard damaged.
Outdoor During cooling and drying
Outdoor temperature sensor
ambient operating, compressor stops
OFF 3S hasnt been connected well or
temperature while indoor fan operates;
14 F3 and blink is damaged. Please check it by
sensor is During heating operation,
3 times referring to the resistance table for
temperature sensor)
circuited operation
Outdoor During cooling and drying
Outdoor temperature sensor
condenser operation, compressor stops
OFF 3S hasnt been connected well or
temperature while indoor fan will operate;
15 F4 and blink is damaged. Please check it by
sensor is During heating operation,
4 times referring to the resistance table for
temperature sensor)
circuited operation.
During cooling and drying 1.Outdoor temperature sensor
Outdoor operation, compressor will sop hasnt been connected well or is
discharge after operating for about 3 damaged. Please check it by
OFF 3S
temperature mins, referring to the resistance table for
16 F5 and blink
sensor is while indoor fan will operate; temperature sensor)
5 times
open/short During heating operation, the 2.The head of temperature sensor
circuited complete unit will stop after hasnt been inserted into the copper
operating for about 3 mins. tube
Limit/
OFF 3S All loads operate normally,
decrease Refer to the malfunction analysis
and blink while
17 frequency F6 (overload, high temperature
for 6 operation frequency for
due to resistant)
times compressor is decreased
overload
Decrease All loads operate normally,

OFF 3S The input supply voltage is too low;
frequency while
18 F8 and blink System pressure is too high and
due to operation frequency for
8 times overload
overcurrent compressor is decreased

Service Manual

Malfunction
Name
Code 0.5s)
Display
Decrease Overload or temperature is too
All loads operate normally,
frequency OFF 3S high;
while
19 due to F9 and blink
operation frequency for
high air 9 times Malfunction of electric expansion
compressor is decreased
discharge valve (EKV)
Limit/
decrease OFF 3S OFF 3S All loads operate normally,
Poor air-return in indoor unit or fan
20 frequency FH and blink and blink while operation frequency for
speed is too low
due to 2 times 2 times compressor is decreased
antifreezing
1. Measure the voltage of position
L and N on wiring board (XT), if the
During cooling and drying voltage is higher than 265VAC, turn
operation, compressor will stop on the unit after the supply voltage
Voltage for OFF 3S is increased to the normal range.
while indoor fan will operate;
21 DC bus-bar PH and blink 2.If the AC input is normal,
11 times During heating operation, the measure the voltage of electrolytic
is too high
complete unit will stop capacitor C on control panel (AP1),
operation. if its normal, theres malfunction
for the circuit, please replace the
control panel (AP1)
1. Measure the voltage of position
L and N on wiring board (XT), if the
voltage is higher than 150VAC,
turn on the unit after the supply
During cooling and drying voltage is increased to the normal
Voltage of OFF 3S operation, compressor will stop range.
22 DC bus-bar PL and blink while indoor fan will operate;
is too low 21 times During heating operation, the 2.If the AC input is normal,
complete unit will stop measure the voltage of electrolytic
capacitor C on control panel (AP1),
if its normal, theres malfunction
for the circuit, please replace the
control panel (AP1)
(during (during
Compressor blinking, blinking,
Min ON ON Showing during min. cooling or
23 P0
frequence in 0.25s 0.25s min. heating test
test state and OFF and OFF
0.25s) 0.25s)
(during (during
rated ON ON Showing during nominal cooling or
24 P1
frequence in 0.25s 0.25s nominal heating test
0.25s) 0.25s)
(during (during
maximum ON ON Showing during max. cooling or
25 P2
frequence in 0.25s 0.25s max. heating test
0.25s) 0.25s)

Service Manual

Malfunction
Name
Code 0.5s)
Display
(during (during
intermediate ON ON Showing during middle cooling or
26 P3
frequence in 0.25s 0.25s middle heating test
0.25s) 0.25s)

Overcurrent Refer to the malfunction
operation, compressor will stop
protection of OFF 3S analysis (IPM protection, loss
27 phase P5 and blink of synchronism protection and
During heating operation, the
current for 15 times overcurrent protection of phase
compressor current for compressor.
operation.

Charging OFF 3S operation, compressor will stop
malfunction and blink Refer to the part three—charging
28 PU while indoor fan will operate;
of capacitor 17 times malfunction analysis of capacitor
Malfunction During cooling and drying

OFF 3S operation, compressor will stop
of module
29 P7 and blink while indoor fan will operate; Replace outdoor control panel AP1
temperature
18 times During heating operation, the
sensor circuit complete unit will stop
After the complete unit is de-

energized for 20mins, check
During cooling operation, whether the thermal grease on IPM
Module high OFF 3S compressor will stop while
Module of outdoor control panel
30 temperature P8 and blink indoor fan will operate;
protection 19 times During heating operation, the
complete unit will stop radiator is inserted tightly. If its no
use, please replace control panel
AP1.
Decrease
frequency
due to high All loads operate normally,
OFF 3S Refer to the malfunction analysis
temperature while
31 H0 and blink (overload, high temperature
resistant operation frequency for
10 times compressor is decreased resistant)
during
heating
operation
Static OFF 3S
32 dedusting H2 and blink
protection twice
During cooling and drying 1. Wiring terminal OVC-COMP

operation, compressor will stop is loosened. In normal state, the
Overload OFF 3S
while indoor fan will operate; resistance for this terminal should
33 protection for H3 and blink
During heating operation, the be less than 1ohm.
compressor 3 times
complete unit will stop 2.Refer to the malfunction analysis (
operation. discharge protection, overload)

Service Manual

Malfunction
Name
Code 0.5s)
Display
OFF 3S Refer to the malfunction analysis
System is while indoor fan will operate;
34 H4 and blink (overload, high temperature
abnormal During heating operation, the
4 times resistant)
operation.
Refer to the malfunction
OFF 3S while indoor fan will operate; analysis (IPM protection, loss
IPM
35 H5 and blink of synchronism protection and
protection 5 times During heating operation, the overcurrent protection of phase
current for compressor.
operation.
PFC operation, compressor will Replace outdoor control panel
36 HC stopwhile indoor fan will
protection AP1 or Reactor
operate;During heating
operation, the complete unit
will stop operation.
1. Bad contact of DC motor
feedback terminal.
Internal fan motor, external fan 2. Bad contact of DC motor
Internal motor OFF 3S motor, compressor and electric control end.
37 (fan motor) do H6 and blink heater stop operation,guide
11 times louver stops at present 3. Fan motor is stalling.
not operate
location. 4. Motor malfunction.
5. Malfunction of mainboard rev
detecting circuit.
During cooling and drying Refer to the malfunction
Desynchro- OFF 3S operation, compressor will stop analysis (IPM protection, loss
38 nizing of H7 and blink of synchronism protection and
compressor 7 times complete unit will stop overcurrent protection of phase
operation. current for compressor.
1.Main board of indoor unit is
Loads operate normally,
damaged;
Malfunction while the unit can’t be
JF 2.Detection board is damaged;
39 of detecting normally controlled by APP
3.The connection between indoor
plate(WIFI ) unit and detection board is not
good;
Outdoor DC OFF 3S Outdoor DC fan motor DC fan motor malfunction or

40 fan motor L3 and blink malfunction lead to compressor system blocked or the connector
malfunction 23 times stop operation, loosed
compressor stop operation and

OFF 3S Outdoor fan motor will stop To protect the electronical
power
41 L9 and blink 30s latter , 3 minutes latter components when detect high
protection
20 times fan motor and compressor will power
restart
Indoor unit
OFF 3S
and outdoor compressor and Outdoor fan Indoor unit and outdoor unit doesn't
42 LP and blink
unit doesn't motor can’t work match
19 times
match
OFF 3S
Failure start- while indoor fan will operate;
43 LC and blink Refer to the malfunction analysis
up During heating operation, the
11 times
operation.

Service Manual

Malfunction
Name
Code 0.5s)
Display
Malfunction of During cooling and drying

phase current OFF 3S operation, compressor will stop
44 detection U1 and blink while indoor fan will operate; Replace outdoor control panel AP1
circuit for 13 times During heating operation, the
compressor complete unit will stop

Malfunction of
voltage OFF 3S operation, compressor will stop
45 U3 and blink while indoor fan will operate; Supply voltage is unstable
dropping for 20 times During heating operation, the
DC bus-bar

operation, the compressor will
Malfunction Theres circuit malfunction on
OFF 3S stop while indoor fan will
of complete outdoor units control panel AP1,
46 U5 and blink operate;
units current 13 times please replace the outdoor units
During heating operating,
detection control panel AP1.
the complete unit will stop
operation.
1.Supply voltage is lower than

If this malfunction occurs AC175V;
The four-way OFF 3S
during 2.Wiring terminal 4V is loosened or
47 valve is U7 and blink
heating operation, the complete broken;
abnormal 20 times
unit will stop operation. 3.4V is damaged, please replace
4V.
Zero- During cooling operation,

OFF 3S compressor will stop while
crossing
48 U9 and blink indoor fan will operate; during Replace outdoor control panel AP1
malfunction of 18 times heating,the complete unit will
outdoor unit stop operation.
once heating
(during
49 Defrosting mode. Compressor will Its the normal state
blinking,
ON 10s operate
and OFF while indoor fan will stop

Service Manual
1. Outdoor ambient
temperature exceeds the
operation range of unit (eg: less
Cool: compressor
than-20oC or more than 60oC
and outdoor fan stops
for cooling; more than 30oC for
Undefined operation, while indoor
heating);
50 outdoor unit oE fan operates; Heat:
2. Failure startup of
error compressor, outdoor
compressor?
fan and indoor fan stop
3. Are wires of compressor not
operation.
connected tightly?
4. Is compressor damaged?
5. Is main board damaged?
Anti-freezing Not the error code. It’s

51 protection for E2 the status code for the
evaporator operation.
Cold air Not the error code. It’s

52 prevention E9 the status code for the
protection operation.
Refrigerant Refrigerant recovery. The
53 recovery Fo Serviceman operates it for
mode maintenance

Service Manual
Analysis or processing of some of the malfunction display:
1. Compressor discharge protection

Possible reasons: shortage of refrigerant; blockage of air filter; poor ventilation or air flow short pass for condenser;the system has
noncondensing gas (such as air, water etc.); blockage of capillary assy (including filter); leakage inside four-way valve causes incorrect
operation; malfunction of compressor; malfunction of protection relay; malfunction of discharge sensor; outdoor temperature too
high.
Processing method: refer to the malfunction analysis in the above section.
2. Low voltage overcurrent protection

Possible reason: Sudden drop of supply voltage.
3. Communic ation malfun ction

Processing method: Check if communic ation signal cable is connected reliably.
4. Sensor open or short circuit
Processing method: Check whethers ensor is normal, connected with the corre sponding position on the controller and if damage of
lead wire is found.
5. Compressor over load protection

Possible reasons: insufficient or too much refrigrant; blockage of capillary an dincrease of suction temp.; improper running of
compressor, burning in or stuck of bearing, damage of discharge valve; malfunction of protector.
Processing method: adjust refrige rant amount; replace the capillary; replace the compressor; use univers al meter to check if the
contactor of compress or is fine when it is not over heated, if not replace the protector.
6. System malfun ction

Overload protection.When tube temperature(Check the temperature of outdoor heat exchanger when cooling and check the
temperature of indoor heat exchanger when heating) is too high, protection will beactivated.
Possible reasons: Outdoor tempera ture is too high when cooling; insufficient outdoor air circulation; refrigerant flow malfunction.
Please refer to the malfunction analysis in the previous section for handling method .
7. IPM module protection

Processing method:Once the module malfunction happens,if it persists for a long time and can not be self-canceled, cut off the
power and turn off the unit,and then re-energize the unit again after about 10 min.After repeating the procedure for sever times, if
the malfunction still exists,replace the module.

Service Manual
9.2 How to Check Simply the Main Part

Indoor unit
1. Malfunction of Temperature Sensor F1, F2
Main detection points:
● Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted?
● Is there short circuit due to trip-over of the parts?
● Is the temperature sensor broken?
● Is mainboard broken? Start
Malfunction diagnosis process:
Is the wiring terminal between the

temperature sensor and the controller Yes
loosened or poorly contacted?
Insert the temperature

sensor tightly
No
No Is malfunction
eliminated
Is there short circuit due to trip- Yes

over of the parts
Make the parts upright
No
No Is malfunction Yes
eliminated
Is the temperature sensor normal No Yes

according to the resistance table?
Replace it with a
temperature sensor with
the same model
Yes
No Is malfunction
eliminated
Replace the mainboard with

the same model.
Yes
End

Service Manual
2.Malfunction of Blocked Protection of IDU Fan Motor H6
Start
Turn the fan blades

by hand under
power-off condition
Adjust the motor and blade

Whether the fan blades assembly so that rotor can run
No
can run smoothly? smoothly.
Turn unit on
Yes to check whether the
No malfunction is
eliminated.
Under power-off condition,

check whether the wiring terminal Reinsert the wiring
between indoor fan and main
Yes terminal of indoor fan.
board is loose.
Turn unit on
No No to check whether the Yes
malfunction is
eliminated.
Connect power and restart the unit. It's the malfunction of main board.
Test whether the voltage between terminal 1 and terminal 2 No Replace a new main board that is
of motor interface is within 280~310VDC. of the same model.
Yes
Yes
Then check whether the voltage It's the malfunction of main board.
between terminal 2 and terminal 3 No Replace a new main board that is
of the same model.
of the motor interface is 15VDC.
Yes
Then check whether there is voltage It's the malfunction of main board.
between terminal 2 and terminal 4 No Replace a new main board that is
of the motor interface. of the same model.
Yes
It's the malfunction of motor.

Replace a new motor that is End
of the same model.

Service Manual
3. Malfunction of Protection of Jumper Cap C5

● Is there jumper cap on the mainboard?
● Is the jumper cap inserted correctly and tightly?
● The jumper is broken?
● The motor is broken?
● Detection circuit of the mainboard is defined abnormal?
Start
No Appearance of the
Is there jumper cap on the mainboard?
jumper cap
Assemble the jumper

cap with the same model
Yes
No Is malfunction
eliminated
Is the jumper cap inserted correctly No

and tightly?
Insert the jumper

cap tightly
Yes
No Is malfunction Yes
eliminated
Replace the jumper cap with

the same model
Is malfunction Yes
eliminated
Yes
No
Replace the mainboard

with the same model
End

Service Manual
4. Malfunction of Overcurrent Protection E5

● Is the supply voltage unstable with big fluctuation?
● Is the supply voltage too low with overload?
● Hardware trouble?
Start
Yes Normal fluctuation should be within 10 % Is malfunction Yes

Is the supply voltage unstable
with big fluctuation? of the rated voltage on the nameplate eliminated
No No
Is the supply voltage too low Yes Adjust the supply voltage to maintain it Is malfunction Yes
with overload? within normal range eliminated
No No
Is the indoor / outdoor Yes Clean the indoor and outdoor heat Is malfunction Yes
heat exchanger dirty,or are the air inlet exchangers and remove the blockage eliminated
and outlet blocked? of air inlet and outlet
No
No
The fan is abnormal? Fan Yes Check the motor and reinstall the Is malfunction Yes
speed is too low or fan doesnt rotate motor to have the fan run normally eliminated
No No
Measure the current of live wire on

the main board with a clamp ampere No Replace the mainboard with the same Yes
Is malfunction
meter. Is the current higher than the model eliminated
value of the overcurrent protection?
Yes No
Is there blockage inside the system? Yes Flush the heat exchangers with high
(Filth blockage, ice plug, greasy Is malfunction Yes
blockage, the cut off valve hasnt been pressure nitrogen eliminated
opened completely)
No No
Is the compressor running abnormally? Yes Is malfunction Yes

Is there abnormal sound or oil leakage; Replace the compressor
eliminated
Is the temperature of the shell too high,
etc.?
No
Replace the mainboard

with the same model
End

Service Manual
5. Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor U8

● Instant energization afte de-energization while the capacitordischarges slowly?
● The zero-cross detectioncircuit of the mainboard is defined abnormal?
Start
Turn power off for

1minute,the turn
back on
The unit returns to normal.

U8 is still No Conclusion:U8 is displayed due to
displayed power off/on while the
capacitor discharges slowly.
Yes
The zero-cross detection circuit

of the mainboard is defined
abnormal.Replace the mainboard
with the same model
End

Service Manual
6.Malfunction of communication E6
● Check if the connection wire and the built-in wiring of indoor and outdoor unit are connected well and without damage;
● If the communication circuit of indoor mainboard is damaged? If the communication circuit of outdoor mainboard (AP1) is
damaged?
Start
Cut off power supply. Check if

connection line of IDU and ODU
and the wire inside electric box
are correctly connected.
Connect the line

Correct connection? no according to Malfunction eliminated?
wiring diagram.
yes
no
Main board matches

Match correctly
with display board? Main board of no Malfunction eliminated? yes
IDU matches with that of ODU? according to product
specification
yes
no
Replace
Communication cord is damaged? yes communication Malfunction eliminated? yes
cord
no
no
Replace IDU's
main board
yes
Replace ODU's
Malfunction eliminated? no
main board.
yes
End

Service Manual
7. Malfunction of detecting plate(WIFI) JF
Start
check if the connection wire

are correctly connected
Yes
Replace the detecting

plate with the same model
Is malfunction
eliminated
Replace the mainboard No Yes

with the same model
The end

Service Manual
Outdoor unit
(1) Capacitor charge fault (Fault with outdoor unit) (AP1 below refers to the outdoor control panel)
Main Check Points:
Use AC voltmeter to check if the voltage between terminal L and N on the wiring board is within 210VAC~240VAC.
If the reactor (L) is correctly connected? If the connection is loose or fallen? If the reactor (L) is damaged?
Fault diagnosis process:
Turn on the unit

and wait 1 minute
Use DC voltmeter
to measure the
voltage on the two
ends of electrolytic
capacitor
Fault with the voltage

Voltage higher than 200V? testing circuit on Replace the control
Y
control panel AP1 panel AP1
Measure the AC voltage between

terminalL and N on wiring board
XT(power supply)
Shut down the power

Voltage within and repair the power power on and If the fault is
210VAC~250VAC? N supply to restore the restart the unit Y
eliminated?
range
210VAC~250VAC
Shut down the power and wait 20 minutes;or

use DC voltmeter to measure the voltage
N
on the two ends of capacitor , until
the voltage is lower than 20V
Check the
connection of reactor
(L in the Electrical
Wiring Diagram)
Connect the reactor

If the wiring of Laccording to Elec- Re-energize and If the fault is
reactor Lis normal? N trical Wiring Diagr- Y
turn on the unit eliminated?
am correctly
Replace the control

panel AP1 N
End

Service Manual
(2)
5. IPM protection, phase current overcurrent (the control board as below indicates the control board
of outdoor unit) H5/P5
Mainly detect:
(1) Compressor COMP terminal (2) voltage of power supply (3) compressor
(4) Refrigerant-charging volume (5) air outlet and air inlet of outdoor/indoor unit
Troubleshooting:
Turn on the unit

after energization
Check the connection

Whether IPM between the control board
protection occurs after the unit has and the compressor by
operated for a while? referring to the electric
wiring diagram
Correctly connect the wires of Check whether wires

Measure the voltage compressor according to the of compressor (UVW) are connected
between terminal L electric wiring diagram, and correctly
and terminal N with then turn on the unit
AC volmeter
Measure the resistance value

among three terminals (UVW)
Whether Check the power of compressor with a resistance
the voltage between supply voltage and measuring meter.
terminal L and terminal N of XT is make the power voltage
within 210AVC~ resume to the range
Whether the
250VAC? of 210VAC~250VAC
resistance value of three terminals
are almost the same.
1. Whether the heat exchangers of indoor unit and outdoor unit are Measure the resistance
dirty? Whether the radiation is affected because the unit is between three terminals (UVW)
covered by the objects? of compressor and the copper pipe
2. When indoor fan and outdoor unit are operate normally? with resistance measuring meter
3. Whether the system pressure is too high?
4. Whether the pressure is because there's too much refrigerant?
Whether the
resistance value is more than
500ohm?
Whether there's Correct it one by one
abnormal phenomenons according to the Service
described as above? Manual, and then turn on
the unit. Replace the
compressor
Whether the unit

can operate normally?
Replace control
board
End

Service Manual
(3)High temperature and overload protection diagnosis (AP1 hereinafter refers to the control board of the outdoor unit)
Mainly detect:
Is outdoor ambient temperature in normal range?
Are the outdoor and indoor fans operating normally?
Is the heat dissipation environment inside and outside the unit is good?
Overheat and high

temperature protection
Normal protection, please operate

Is outdoor ambient temperature higher than 53? Y it after the outdoor ambient temp-
erature is normalized.
20 minutes after the complete

unit is powered off.
Improve the heat

Is heat dissipation of the indoor unit Y dissipation environ-
and outdoor unit abnormal? ment of the unit
N
1. Check if the fan terminal OFAN
is connected correctly
2. Disconnect the needle stand of

Does the outdoor fan work normally? N fan and measure the resistance
between two terminals of fan with
ohmmeter. The resistance shall be
less than 1K Ohm.
Replace the Y
control panel AP1 N
Replace the
outdoor fan
End

Service Manual
(4) Start-up failure (following AP1 for outdoor unit control board)
Mainly detect:
Whether the compressor wiring is connected correct?
Is compressor broken?
Is time for compressor stopping enough?
Power on the unit
Is stop time of the compressor N Restart it up after

longer than 3 minutes? 3 minutes
Does startup fail?
Connect the wires as

Are the wires for the compressor connected N per the connection
correctly? Is connection sequence right? diagram
Replace the control panel AP1
If the fault is eliminated?
Replace the
compressor
End

Service Manual
(5) Out of step diagnosis for the compressor (AP1 hereinafter refers to the control board of the outdoor unit)
Mainly detect:
Whether the system pressure is too high?
Whether the input voltage is too low?
Out of step occurs once the Out of step occurs in

unit is powered on. operation
Disconnect
the needle stand of
Is stop time of the Is the outdoor fan working fan and measure the resistance
compressor longer than normally? between two terminals of fan with
3 minutes? ohmmeter. The resistance shall
be less than 1K Ohm.
Replace the
outdoor fan
Is the outdoor unit blocked Remove foreign
by foreign objects? objects
Are the wires for the compressor connected
correctly? Is connection sequence right?
Is the connection made in clockwise
direction?
Replace the
control panel AP1
Connect the
wires correctly
Replace the control

panel AP1
Replace the
compressor
Replace the
compressor
End
End

Service Manual
(6)Overload and air exhaust malfunction diagnosis (following AP1 for outdoor unit control board)
Mainly detect:
Wether the PMV is connected well or not? Is PMV damaged?
Is refrigerant leaked?
20 minutes after the

complete unit is
powered off
Is the terminal FA for the Connect the

electronic expansion valve wires correctly
connected correctly?
Resistances between the first four pins

close to the terminal hole and the fifth
pin are almost the same, less than 100
ohm.
Replace the electronic

expansion valve
Replace the
control panel
AP1
Coolant leakage, refilling

the coolant
End

Service Manual
(7) High-pressure Protection
High-pressure protection
Use pressure gauge to no yes

Measure if the pressure switch Replace the mainboard of
measure if the pressure is is normal˛
really high? outdoor unit
no
yes
Check if the operation mode of no Set the correct operation

Replace the pressure switch
indoor unit is set properly? mode
yes
Check if the gas valve and no

Fully open the valve
liquid valve are fully open ?
yes
no Cover up the front panel

Check if the front panel of
outdoor unit is covered tightly? properly
yes
Check if the air inlet and outlet of no

the indoor and outdoor Remove the obstructions
exchanger is smooth ?
yes
no Measure the fan motor and

Check if the indoor and
outdoor fans operate normally? signal input
yes
no
Check if the indoor swing Measure the swing motor and
louver is fully open ? signal input
yes
Check if the capacity output of no Refer to the dial -up of indoor

outdoor unit is equal to the
capacity demand of indoor units ? and outdoor unit
yes
no
Check if the indoor/ outdoor Replace the blocked parts or
filters or radiating fins are dirty or The system pipe is blocked
pipe
blocked ?
no
Clean the fins

Service Manual
(8) Communication malfunction: (following AP1 for outdoor unit control board)
Mainly detect:
Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged?
Detect the indoor and outdoor units connection wire and indoor and outdoor units inside wiring is connect well or not, if is
there any damage?
Start
Did the equipment operate

N
normally before the failure
Y occurs?
Check the wiring of the indoor and

outdoor units with reference to the
wiring diagram
Check wiring inside of

the indoor and outdoor Y Is the connection right?
units N
Correctly connect the

The AP1 voltage corresponding wires for
detection circuit Y Are wires broken? the indoor and outdoor
is at fault units with reference to
the wiring diagram
N
Check the communication

If the fault is eliminated? N
circuit of the outdoor unit
The communication Replace the main board

Y
circuit is abnormal AP1 of the outdoor unit
N
N
Replace the main board
of the indoor unit
Y
Y End

Service Manual
(9) Communication malfunction:(following AP1 for outdoor unit control board)

Mainly detect:
Detect the indoor and outdoor units connection wire and indoor and outdoor units inside wiring is connect well or not,
If is there any damage?
Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged?
The flow chart fir malfunction detect:
Start
Did the equipment operate

N
normally before the failure
Y occurs?
Check the wiring of the indoor and

outdoor units with reference to the
wiring diagram
Check wiring inside of

the indoor and outdoor Y Is the connection right?
units N
Correctly connect the

The AP1 voltage corresponding wires for
detection circuit Y Are wires broken? the indoor and outdoor
is at fault units with reference to
the wiring diagram
Check the communication

If the fault is eliminated? N
circuit of the outdoor unit
The communication Replace the main board

Y
circuit is abnormal AP1 of the outdoor unit
N
N
Replace the main board of
the indoor unit
Y End Y

Service Manual
9.3 Troubleshooting for Normal Malfunction

1. Air Conditioner Cant be Started Up
Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting
Confirm whether its due to power failure. If yes,
No power supply, or poor After energization, operation indicator isnt bright wait for power recovery. If not, check power
connection for power plug and the buzzer cant give out sound supply circuit and make sure the power plug is
connected well.
Wrong wire connection between
Check the circuit according to circuit diagram
indoor unit and outdoor unit, Under normal power supply circumstances,
and connect wires correctly. Make sure all
or poor connection for wiring operation indicator isnt bright after energization
wiring terminals are connected firmly
terminals
Make sure the air conditioner is grounded
reliably
Make sure wires of air conditioner is connected
After energization, room circuit breaker trips off at
Electric leakage for air conditioner correctly
once
Check the wiring inside air conditioner. Check
whether the insulation layer of power cord is
damaged; if yes, place the power cord.
Model selection for air switch is
After energization, air switch trips off Select proper air switch
improper
After energization, operation indicator is bright,
Replace batteries for remote controller
Malfunction of remote controller while no display on remote controller or buttons
Repair or replace remote controller
have no action.
2. Poor Cooling (heating) for Air Conditioner

Set temperature is improper Observe the set temperature on remote controller Adjust the set temperature
Rotation speed of the IDU fan
Small wind blow Set the fan speed at high or medium
motor is set too low
Filter of indoor unit is blocked Check the filter to see its blocked Clean the filter
Check whether the installation postion is proper
Installation position for indoor unit Adjust the installation position, and install the
according to installation requirement for air
and outdoor unit is improper rainproof and sunproof for outdoor unit
conditioner
Discharged air temperature during cooling is
higher than normal discharged wind temperature;
Discharged air temperature during heating is Find out the leakage causes and deal with it.
Refrigerant is leaking
lower than normal discharged wind temperature; Add refrigerant.
Units pressure is much lower than regulated
range
Malfunction of 4-way valve Blow cold wind during heating Replace the 4-way valve
Discharged air temperature during cooling is
higher than normal discharged wind temperature;
Discharged air temperature during heating is
Malfunction of capillary lower than normal discharged wind temperature; Replace the capillary
Unitt pressure is much lower than regulated
range. If refrigerant isnt leaking, part of capillary
is blocked
Flow volume of valve is The pressure of valves is much lower than that
Open the valve completely
insufficient stated in the specification
Refer to point 3 of maintenance method for
Malfunction of horizontal louver Horizontal louver cant swing
details
Refer to troubleshooting for H6 for maintenance
Malfunction of the IDU fan motor The IDU fan motor cant operate
method in details
Malfunction of the ODU fan motor The ODU fan motor cant operate
details
Malfunction of compressor Compressor cant operate
details
3. Horizontal Louver Cant Swing

Connect wires according to wiring diagram to
Wrong wire connection, or poor Check the wiring status according to circuit
make sure all wiring terminals are connected
connection diagram
firmly
Stepping motor is damaged Stepping motor cant operate Repair or replace stepping motor
Others are all normal, while horizontal louver cant
Main board is damaged Replace the main board with the same model
operate

Service Manual
4. ODU Fan Motor Cant Operate

Possible causes Discriminating method (air conditioner status) Troubleshooting
connection diagram
firmly
Measure the capacity of fan capacitor with an
Capacity of the ODU fan motor is universal meter and find that the capacity is out of
Replace the capacity of fan
damaged the deviation range indicated on the nameplate of
fan capacitor.
Power voltage is a little low or Use universal meter to measure the power supply
Suggest to equip with voltage regulator
high voltage. The voltage is a little high or low
When unit is on, cooling/heating performance
Change compressor oil and refrigerant. If no
Motor of outdoor unit is damaged is bad and ODU compressor generates a lot of
better, replace the compressor with a new one
noise and heat.
5. Compressor Cant Operate

connection diagram
firmly
Measure the capacity of fan capacitor with an
Capacity of compressor is universal meter and find that the capacity is out of
Replace the compressor capacitor
damaged the deviation range indicated on the nameplate of
fan capacitor.
Power voltage is a little low or Use universal meter to measure the power supply
Suggest to equip with voltage regulator
high voltage. The voltage is a little high or low
Use universal meter to measure the resistance
Coil of compressor is burnt out Repair or replace compressor
between compressor terminals and its 0
Cylinder of compressor is blocked Compressor cant operate Repair or replace compressor
6. Air Conditioner is Leaking

Eliminate the foreign objects inside the drain
Drain pipe is blocked Water leaking from indoor unit
pipe
Drain pipe is broken Water leaking from drain pipe Replace drain pipe
Water leaking from the pipe connection place of
Wrapping is not tight Wrap it again and bundle it tightly
indoor unit
7. Abnormal Sound and Vibration

When turn on or turn off the unit,
the panel and other parts will Normal phenomenon. Abnormal sound will
Theres the sound of "PAPA"
expand and theres abnormal disappear after a few minutes.
sound
When turn on or turn off the
unit, theres abnormal sound due Normal phenomenon. Abnormal sound will
Water-running sound can be heard
to flow of refrigerant inside air disappear after a few minutes.
conditioner
Foreign objects inside the indoor Remove foreign objects. Adjust all parts position
unit or therere parts touching Theres abnormal sound fro indoor unit of indoor unit, tighten screws and stick damping
together inside the indoor unit plaster between connected parts
Foreign objects inside the outdoor Remove foreign objects. Adjust all parts position
unit or therere parts touching Theres abnormal sound fro outdoor unit of outdoor unit, tighten screws and stick
together inside the outdoor unit damping plaster between connected parts
Short circuit inside the magnetic During heating, the way valve has abnormal
Replace magnetic coil
coil electromagnetic sound
Adjust the support foot mat of compressor,
Abnormal shake of compressor Outdoor unit gives out abnormal sound
tighten the bolts
If add too much refrigerant during maintenance,
Abnormal sound inside the
Abnormal sound inside the compressor please reduce refrigerant properly. Replace
compressor
compressor for other circumstances.

Service Manual
10. Exploded View and Parts List

10.1 Indoor Unit
TW30HQ2B4DI
22
21
46
WIFI
MODE
FAN
TIMER ON CLOCK
ON/OFF
SWING
TIMER OFF
20
19
TURBO TEMP SLEEP
IFEEL X-FAN
18
17
16
15 23
14
13 24
12 25
11
10
9
8 26
7
6
5
27
4 28
3 29
2 30
31
36 32
33
37 34
35
1 38
39
42
41
40
The component picture is only for reference; please refer to the actual product.

Service Manual
Part Code
Description
NO. TW30HQ2B4DI Qty
Product Code CB434N04801_L87641
1 Receiver Window / /
2 Front Panel 27230006890 1
3 Stand bar 2421212001 1
4 Filter Sub-Assy 11122106 2
5 Front Case Sub-Assy 20900700005 1
6 Upper Guide Louver 1051216601 1
7 Lower guide louver 1051216701 1
8 Axile Bush 10542704 6
9 Air Louver 2 1051216902 2
10 Air Louver 1 1051216802 16
11 Connecting Rod 10582086 2
12 Louver Clamp 26112158 9
13 Water Tray 2018213802 1
14 Screw Cover 2425200506 4
15 Rubber Plug (Water Tray) 76712012 1
16 Rear Case Sub-Assy 00000100113 1
17 Cross Flow Fan 1 10352039 1
18 Bearing Holder sub-assy 26152028 1
20 O-Gasket sub-assy of Bearing 76512051 1
21 Left Evaporator Support 24212041 1
22 Evaporator Assy 01002000027 1
23 Wall Mounting Frame 01252398 1
24 Right Support of Evaporator 2421204201 1
25 Fan Motor 1501213401 1
26 Pipe Clamp 26112071 1
27 Drainage hose 0523001404 1
28 Fixed Clip (Evaporator) 02112009 1
29 Cover Plate 2012212402 1
30 Motor Fixed Clip 26112324 1
31 Step Motor 1521210701 1
32 Press plate (crank) 26112070 1
33 Crank-guide 10582041 1
34 Upper Crank 10562004 1
35 Lower crank 10562005 1
36 Electric Box Assy 10000204113 1
37 Electric Box 201022502 1
38 Terminal Board 42011233 1
39 Main Board 30138001017 1
40 Display Board 30565277 1
41 Electric Box Cover 201022523 1
42 Electric Box Cover 2011204404S 1
43 Remote Controller 305001000085_TOSOT 1
44 Tube Sensor 390000453 1
45 Ambient Temperature Sensor 390000592 1
46 Detecting plate(WIFI) 30070077 1
Above data is subject to change without notice.

Service Manual
TW36HQ2B4DI
21
20
43 42 41 40
WIFI
MODE ON/OFF
19
FAN SWING
TIMER ON CLOCK TIMER OFF
TURBO TEMP SLEEP
18
IFEEL X-FAN
17
16
15
14
13
12
11
10 22
9
8
7
6 23
5
4
24
3
25
2
26
1 27
28
33 29
30
34 31
32
35
36
39
38
37

Service Manual
Part Code
Description
NO. TW36HQ2B4DI Qty
Product Code CB432N08101_L87641
1 Front Panel 27230013668 1
2 Stand Bar 2421212001 1
3 Filter Sub-Assy 11122106 2
4 Front Case Sub-assy 20900700005 1
5 Upper Guide Louver 1051216601 1
6 Lower Guide Louver 1051216701 1
7 Axile Bush 10542704 6
8 Air Louver 2 1051216902 2
9 Air Louver 1 1051216802 16
10 Connecting Rod 10582086 2
11 Louver Clamp 26112158 9
12 Water Tray 2018213802 1
13 Screw Cover 2425200506 4
14 Rubber Plug (Water Tray) 76712012 1
15 Rear Case assy 00000100113 1
17 Bearing Holder Sub-assy 26152028 1
19 O-Gasket sub-assy of Bearing 76512051 1
20 Left Evaporator Support 24212041 1
21 Evaporator Assy 1002000027 1
22 Wall Mounting Frame 1252398 1
23 Fan Motor 1501213401 1
24 Pipe Clamp 26112071 1
25 Drainage Hose 523001404 1
26 Cover Plate 2012212402 1
27 Motor Fixed Clip 1 26112324 1
28 Stepping Motor 1521210701 1
29 Press Plate(Crank) 26112070 1
30 Crank-guide 10582041 1
31 Upper Crank 10562004 1
32 Lower crank 10562005 1
33 Electric Box Assy 100002001022 1
34 Electric Box 201022502 1
35 Terminal Board 42011233 1
36 Main Board 30138001017 1
37 Display Board 30565277 1
38 Electric Box Cover 2011204404S 1
39 Electric Box Cover 2011204404 1
40 Remote Controller 305001000085_TOSOT 1
41 Temperature Sensor 390000592 1
42 Temperature Sensor 390000453 1
43 Detecting plate(WIFI) 30070077 1

Service Manual
10.2 Outdoor Unit
28
35
29 27 26 25 24 23 22 21
36
30
37
31
38 32
39 33
40
34
20
41
19
18
17
1 16
2 3 4 5 6 7 8 9 10
11 12 13 14 15

Service Manual
Part Code
Description
NO. TW30HQ2B4DO TW36HQ2B4DO Qty
Product Code CB171W10600_L87641 CB432W08100_L87641
1 Front Grill 01473050 1473050 1
2 Cabinet 0143500401P 0143500401P 1
3 Front Side Plate 01303249P 01303249P 1
4 Axial Flow Fan 10335014 10335014 1
5 Drainage Plug 06813401 7671301802 1
6 Chassis Sub-assy 02803101P 0280319605 1
7 Drainage Connecter 06123401 06123401 1
8 Compressor Gasket 76715022 76713066 3
9 Compressor and fittings 00105051 205200003 1
10 Electrical heater 7651873209 7651000413 1
11 Magnet Coil 4300040029 4300040029 1
12 4-way Valve Assy 03123895 30152000213 1
13 Right Side Plate 0130504402P 0130504402P 1
14 Valve Support Sub-Assy 0171501201P 0171501201P 1
15 Cut-off Valve 07133157 07130239 1
16 Valve cover 22245003 22245003 1
17 Retaining plate 02115006P 02115006P 1
18 Handle assy 02113109 2113109 1
19 Wiring clamp 26115004 26115004 1
20 Electronic expansion valve Sub-Assy 07133688 07133684 1
21 Temperature Sensor 3900031001 3900031001 1
22 Rear Grill 01475013 01475013 1
23 Condenser Assy 01163509 01163491 1
24 Clapboard 01233134 01233134 1
25 Condenser support plate 01175092 01175037 1
26 Motor Support Sub-Assy 0180287601 01802876 1
27 Top Cover Sub-Assy 01255007 1255007 1
28 Electric Box Cover 01425279 01425281 1
29 Reactor 43130192 43130192 2
30 Electric Box Sub-Assy 02603620 02603620 1
31 Pass wire ring sub-assy 76614102 76614102 2
32 left handle 26233053 2113031 1
33 Left Side Plate 01305043P 01305043P 1
34 Fan Motor 15702802 1570280000405 1
35 Electric Box Cover 01425281 01425281 1
36 Main Board 30148338 300027000216 1
37 Electric Box 02603614 02603614 1
38 Radiator 49010252 49010252 1
39 Terminal Board 42200006001401 42200006001401 1
40 Electric Box Assy 02613050 100002001028 1
41 Electrical Heater (Chassis) 765100047 7651000413 1

Service Manual
11. Removal Procedure

Warning: Be sure to wait for a minimum
of 20 minutes after turning off all power
supplies and discharge the refrigerant
11.1 Removal Procedure of Indoor Unit completely before removal.
Steps Procedure
1.Before disassembly of the unit
Axonometric drawing for the complete

unit.
2.Remove filter
panel
a Open the panel.
b Loosen the clasps on the filter.
clasps
c Draw out two pieces of filter.

filter

Service Manual
Steps Procedure
3.Remove display B2 panel
A3/A5 panel
Remove screws fixing display, and then remove display
the display.
4.Remove panel clasps
Pull the clasps at both sides slightly, and then

remove the panel.
panel
5.Remove horizontal louver
Remove the axial bush on the horizontal louver,

and then remove the horizontal louver.
horizontal louver

Service Manual
Steps Procedure
6.Remove detecting plate and top cover of electric box
a Remove the screw fixing detecting plate and then Detecting plate
remove the detecting plate. screw
Note:The position of detection board(WIFI)
may be different for -different models.
screw
Remove screws fixing the top cover of electric box.

b Remove the top cover of electric box.
top cover of electric box
7.Remove front case screw cap
a Remove the screw caps on front case.
screw
b Remove screws connecting the front case.
front case
c Remove the front case.

Service Manual
Steps Procedure
8.Remove earthing wire
Remove earthing screws, and then remove screw

the earthing wire.
9.Remove electric box cover
clasp
a Loosen clasps at the left side of electric box.
b Loosen clasps on the right side of electric box.

clasp
electric box cover
b Remove electric box cover.

Service Manual
Steps Procedure
10.Remove temperature sensor
Pull out the indoor temperature sensor.

temperature sensor
11.Remove electric box
a Pull out 6 sockets on PCB board.
b Pull out two screws on electric box.

screw
electric box
c Remove the electric box.

Service Manual
Steps Procedure
12.Remove water tray
water tray
Pull the water tray upwards, and then remove

the water tray.
13.Remove connection pipe between indoor and

outdoor units
Separate the connection pipe between

indoor and outdoor units.
connection position for indoor and outdoor units' connection pipe
14.Remove pipe-stopping plate
Remove two screws on pipe-stopping plate for

indoor unit, and then remove the pipe-stopping
plate.
screw
pipe-stopping plate
15.Remove damping board

screw
damping board
Remove 2 screws on damping board, and then

remove the damping board.

Service Manual
Steps Procedure
16.Remove evaporator
screw
a Remove screws between evaporator and bottom

case.
b Turn over the indoor unit and adjust the pipe line to
the position as shown by the broken line.
c Lift up the evaporator, and then remove the

evaporator.
evaporator
17.Remove the fixing plate of motor
Remove 2 screws on fixing plate of motor, and then

remove the fixing pate of motor. screw

Service Manual
Steps Procedure
18.Remove cross flow blade and motor

blade
motor
a Remove screws fixing cross flow blade and motor.
b Remove the motor sub-assy.
c Separate two cross flow blade.

Service Manual
Steps Procedure
19.Remove cushion rubber
a Remove the cushion rubber on cross flow blade.
cushion rubber
b Remove the cushion rubber from the base.

Service Manual
11.2 Removal Procedure of Outdoor Unit
Note: Take heat pump unit for example.
Steps Procedure
1. Remove big handle,valve cover and top cover
Remove the screw connecting the big handle and

right side plate, and then remove the big handle.
Remove the screw connecting the valve cover and
right side plate, and then remove the valve cover.
handle
valve cover
2.Remove top panel
top panel
Remove the screws connecting the top
panel with the front panel and left&right
side plate, and then remove the top panel.
3.Remove front side panel
Loosen the screws connecting the front side

panel and chassis. Remove the front side
panel.
front side panel

Service Manual
Steps Procedure
4.Remove grille and panel
Twist off the screws connecting the grille and

panel, and then remove the grille.
Twist off the screws connecting the panel, chassis

and motor support with screwd-river, and then
remove the panel.
grille panel
5.Remove right side plate
Twist off the screws connecting the right side

plate and chassis, valve support and condenser,
and then remove the right side plate.
Right side plate
6.Remove axial flow blade
axial flow blade
Twist off the nuts on blade with wrench and then

remove the axial flow blade.

Service Manual
Steps Procedure
7.Remove electric box
electric box
Twist off the screws on electric box, cut off the

tieline with scissors or pliers, pull out the wiring
terminal, pull it upwards to remove the electric
box.
Twist off the screws on electric box (fireproofing)

with screwdriver, and then remove the electric electric box
box (fireproofing). (fireproofing)
8.Remove motor
Twist off the tapping screws fixing the motor, pull

out the pin of leading wire for motor and then
remove the motor.
motor

Service Manual
Steps Procedure
9.Remove motor support
Twist off the tapping screws fixingthe motor

support, pull it upwardsand then remove the
motor support.
motor support
10.Remove isolation sheet
Twist off the screws connecting isolation sheet

and end plate of condenser and chassis, and
then remove the isolation sheet.
isolation sheet
11.Remove 4-way valve
4-way valve
Unsolder the pipeline between compressor,

condenser, gas and liquid valve, and then
remove the 4-way valve. (note: release all
refrigerant before unsoldering).

Service Manual
Steps Procedure
12.Remove gas valve and liquid valve
Twist off the 2 bolts fixing the valve sub-assy.

Unsolder the soldering joint between gas valve
and air-return pipe and then remove the gas
valve.(note: when unsoldering the soldering joint,
wrap the gas valve with wet cloth completely to gas valve
avoid the damage to valve, and release all
refrigerant completely at first). Unsolder the
soldering joint between liquid valve and
connection pipe of liquid valve, and then remove
the liquid valve.
liquid valve
13.Remove valve support
Twist off the screws connecting valve support and

chassis, and then remove the valve support.
valve support
14.Remove compressor
compressor
Twist off the 3 foot nuts on compressor and then

remove the compressor.

Service Manual
Steps Procedure
15.Remove left side plate
Twist off the screws connecting the left side plate

and chassis with screwdriver, and then remove
the left side plate.
left side plate
16.Remove chassis and condenser
Pull it upwards to separate the chassis and

condenser.
condenser
chassis

Service Manual
Appendix:
Appendix 1: Reference Sheet of Celsius and Fahrenheit
Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32
Set temperature
Fahrenheit Fahrenheit Fahrenheit
display Fahrenheit display Fahrenheit display Fahrenheit
Celsius（℃） Celsius（℃） Celsius（℃）
temperature （℉） temperature （℉） temperature （℉）
（℉）（℉）（℉）
61 60.8 16 69/70 69.8 21 78/79 78.8 26
62/63 62.6 17 71/72 71.6 22 80/81 80.6 27
64/65 64.4 18 73/74 73.4 23 82/83 82.4 28
66/67 66.2 19 75/76 75.2 24 84/85 84.2 29
68 68 20 77 77 25 86 86 30
Ambient temperature
Fahrenheit Fahrenheit Fahrenheit
display Fahrenheit display Fahrenheit display Fahrenheit
Celsius（℃） Celsius（℃） Celsius（℃）
temperature （℉） temperature （℉） temperature （℉）
（℉）（℉）（℉）
32/33 32 0 55/56 55.4 13 79/80 78.8 26
34/35 33.8 1 57/58 57.2 14 81 80.6 27
36 35.6 2 59/60 59 15 82/83 82.4 28
37/38 37.4 3 61/62 60.8 16 84/85 84.2 29
39/40 39.2 4 63 62.6 17 86/87 86 30
41/42 41 5 64/65 64.4 18 88/89 87.8 31
43/44 42.8 6 66/67 66.2 19 90 89.6 32
45 44.6 7 68/69 68 20 91/92 91.4 33
46/47 46.4 8 70/71 69.8 21 93/94 93.2 34
48/49 48.2 9 72 71.6 22 95/96 95 35
50/51 50 10 73/74 73.4 23 97/98 96.8 36
52/53 51.8 11 75/76 75.2 24 99 98.6 37
54 53.6 12 77/78 77 25
Appendix 2: Configuration of Connection Pipe
1.Standard length of connection pipe (More details please refer to the specifications.)
2.Min. length of connection pipe is 9.84ft.
3.Max. length of connection pipe and max. high difference.(More details please refer to the specifications.)
4.The additional refrigerant oil and refrigerant charging required after prolonging connection pipe
● After the length of connection pipe is prolonged for 32.81ft at the basis of standard length, you should add 5ml of refrigerant oil
for each additional 16.40ft of connection pipe.
● The calculation method of additional refrigerant charging amount (on the basis of liquid pipe):
● When the length of connection pipe is above 16.40ft, add refrigerant according to the prolonged length of liquid pipe. The
additional refrigerant charging amount per meter is different according to the diameter of liquid pipe. See the following sheet.
● Additional refrigerant charging amount = prolonged length of liquid pipe X additional refrigerant charging amount per meter
Additional refrigerant charging amount for R22, R407C, R410A and R134a
Diameter of connection pipe Outdoor unit throttle
Liquid pipe(inch) Gas pipe(inch) Cooling only(oz/ft.) Cooling and heating(oz/ft.)
Ф1/4 Ф3/8or Ф1/2 0.2 0.2
Ф1/4 or Ф3/8 Ф5/8 or Ф3/4 0.2 0.2
Ф1/2 Ф3/4 or Ф7/8 0.3 1.3
Ф5/8 Ф1 or Ф1 1/4 0.7 1.3
Ф3/4 / 2.7 2.7
Ф7/8 / 3.8 3.8

Service Manual
Appendix 3: Pipe Expanding Method

Pipe
Note:
Improper pipe expanding is the main cause of refrigerant leakage.Please Pipe cutter
expand the pipe according to the following steps:
Leaning Uneven Burr
A:Cut the pip
● Confirm the pipe length according to the distance of indoor unit and outdoor unit.
● Cut the required pipe with pipe cutter.
B:Remove the burrs Pipe
● Remove the burrs with shaper and prevent the burrs from getting into the pipe. Shaper
Downwards
C:Put on suitable insulating pipe
D:Put on the union nut Union pipe

● Remove the union nut on the indoor connection pipe and outdoor valve; install
the union nut on the pipe. Pipe
E:Expand the port

● Expand the port with expander.
Hard
Note: mold
Expander
● "A" is different according to the diameter, please refer to the sheet below:
A(inch) Pipe
Outer diameter(inch)
Max Min
Ф1/4 2/39 1/36
Ф3/8 1/16 1/51
Ф1/2 1/14 1/51
Ф5/8 5/53 2/23
Smooth surface
F:Inspection
● Check the quality of expanding port. If there is any blemish, expand the
Improper expanding
port again according to the steps above.
leaning damaged crack uneven

surface thickness
The length is equal

Service Manual
Appendix 4: List of Resistance for Temperature Sensor

Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(15K)
Temp.(oF) Resistance(kΩ) Temp.(oF) Resistance(kΩ) Temp.(oF) Resistance(kΩ) Temp.(oF) Resistance(kΩ)

-2.2 138.1 68 18.75 138.2 3.848 208.4 1.071
-0.4 128.6 69.8 17.93 140 3.711 210.2 1.039
1.4 121.6 71.6 17.14 141.8 3.579 212 1.009
3.2 115 73.4 16.39 143.6 3.454 213.8 0.98
5 108.7 75.2 15.68 145.4 3.333 215.6 0.952
6.8 102.9 77 15 147.2 3.217 217.4 0.925
8.6 97.4 78.8 14.36 149 3.105 219.2 0.898
10.4 92.22 80.6 13.74 150.8 2.998 221 0.873
12.2 87.35 82.4 13.16 152.6 2.896 222.8 0.848
14 82.75 84.2 12.6 154.4 2.797 224.6 0.825
15.8 78.43 86 12.07 156.2 2.702 226.4 0.802
17.6 74.35 87.8 11.57 158 2.611 228.2 0.779
19.4 70.5 89.6 11.09 159.8 2.523 230 0.758
21.2 66.88 91.4 10.63 161.6 2.439 231.8 0.737
23 63.46 93.2 10.2 163.4 2.358 233.6 0.717
24.8 60.23 95 9.779 165.2 2.28 235.4 0.697
26.6 57.18 96.8 9.382 167 2.206 237.2 0.678
28.4 54.31 98.6 9.003 168.8 2.133 239 0.66
30.2 51.59 100.4 8.642 170.6 2.064 240.8 0.642
32 49.02 102.2 8.297 172.4 1.997 242.6 0.625
33.8 46.6 104 7.967 174.2 1.933 244.4 0.608
35.6 44.31 105.8 7.653 176 1.871 246.2 0.592
37.4 42.14 107.6 7.352 177.8 1.811 248 0.577
39.2 40.09 109.4 7.065 179.6 1.754 249.8 0.561
41 38.15 111.2 6.791 181.4 1.699 251.6 0.547
42.8 36.32 113 6.529 183.2 1.645 253.4 0.532
44.6 34.58 114.8 6.278 185 1.594 255.2 0.519
46.4 32.94 116.6 6.038 186.8 1.544 257 0.505
48.2 31.38 118.4 5.809 188.6 1.497 258.8 0.492
50 29.9 120.2 5.589 190.4 1.451 260.6 0.48
51.8 28.51 122 5.379 192.2 1.408 262.4 0.467
53.6 27.18 123.8 5.197 194 1.363 264.2 0.456
55.4 25.92 125.6 4.986 195.8 1.322 266 0.444
57.2 24.73 127.4 4.802 197.6 1.282 267.8 0.433
59 23.6 129.2 4.625 199.4 1.244 269.6 0.422
60.8 22.53 131 4.456 201.2 1.207 271.4 0.412
62.6 21.51 132.8 4.294 203 1.171 273.2 0.401
64.4 20.54 134.6 4.139 204.8 1.136 275 0.391
66.2 19.63 136.4 3.99 206.6 1.103 276.8 0.382

Service Manual
Resistance Table of Tube Temperature Sensors for Indoor and Outdoor (20K)

-2.2 181.4 68 25.01 138.2 5.13 208.4 1.427
-0.4 171.4 69.8 23.9 140 4.948 210.2 1.386
1.4 162.1 71.6 22.85 141.8 4.773 212 1.346
3.2 153.3 73.4 21.85 143.6 4.605 213.8 1.307
5 145 75.2 20.9 145.4 4.443 215.6 1.269
6.8 137.2 77 20 147.2 4.289 217.4 1.233
8.6 129.9 78.8 19.14 149 4.14 219.2 1.198
10.4 123 80.6 18.13 150.8 3.998 221 1.164
12.2 116.5 82.4 17.55 152.6 3.861 222.8 1.131
14 110.3 84.2 16.8 154.4 3.729 224.6 1.099
15.8 104.6 86 16.1 156.2 3.603 226.4 1.069
17.6 99.13 87.8 15.43 158 3.481 228.2 1.039
19.4 94 89.6 14.79 159.8 3.364 230 1.01
21.2 89.17 91.4 14.18 161.6 3.252 231.8 0.983
23 84.61 93.2 13.59 163.4 3.144 233.6 0.956
24.8 80.31 95 13.04 165.2 3.04 235.4 0.93
26.6 76.24 96.8 12.51 167 2.94 237.2 0.904
28.4 72.41 98.6 12 168.8 2.844 239 0.88
30.2 68.79 100.4 11.52 170.6 2.752 240.8 0.856
32 65.37 102.2 11.06 172.4 2.663 242.6 0.833
33.8 62.13 104 10.62 174.2 2.577 244.4 0.811
35.6 59.08 105.8 10.2 176 2.495 246.2 0.77
37.4 56.19 107.6 9.803 177.8 2.415 248 0.769
39.2 53.46 109.4 9.42 179.6 2.339 249.8 0.746
41 50.87 111.2 9.054 181.4 2.265 251.6 0.729
42.8 48.42 113 8.705 183.2 2.194 253.4 0.71
44.6 46.11 114.8 8.37 185 2.125 255.2 0.692
46.4 43.92 116.6 8.051 186.8 2.059 257 0.674
48.2 41.84 118.4 7.745 188.6 1.996 258.8 0.658
50 39.87 120.2 7.453 190.4 1.934 260.6 0.64
51.8 38.01 122 7.173 192.2 1.875 262.4 0.623
53.6 36.24 123.8 6.905 194 1.818 264.2 0.607
55.4 34.57 125.6 6.648 195.8 1.736 266 0.592
57.2 32.98 127.4 6.403 197.6 1.71 267.8 0.577
59 31.47 129.2 6.167 199.4 1.658 269.6 0.563
60.8 30.04 131 5.942 201.2 1.609 271.4 0.549
62.6 28.68 132.8 5.726 203 1.561 273.2 0.535
64.4 27.39 134.6 5.519 204.8 1.515 275 0.521
66.2 26.17 136.4 5.32 206.6 1.47 276.8 0.509

Service Manual
Resistance Table of Discharge Temperature Sensor for Outdoor(50K)

-20.2 853.5 50 98 120.2 18.34 190.4 4.754
-18.4 799.8 51.8 93.42 122 17.65 192.2 4.609
-16.6 750 53.6 89.07 123.8 16.99 194 4.469
-14.8 703.8 55.4 84.95 125.6 16.36 195.8 4.334
-13 660.8 57.2 81.05 127.4 15.75 197.6 4.204
-11.2 620.8 59 77.35 129.2 15.17 199.4 4.079
-9.4 580.6 60.8 73.83 131 14.62 201.2 3.958
-7.6 548.9 62.6 70.5 132.8 14.09 203 3.841
-5.8 516.6 64.4 67.34 134.6 13.58 204.8 3.728
-4 486.5 66.2 64.33 136.4 13.09 206.6 3.619
-2.2 458.3 68 61.48 138.2 12.62 208.4 3.514
-0.4 432 69.8 58.77 140 12.17 210.2 3.413
1.4 407.4 71.6 56.19 141.8 11.74 212 3.315
3.2 384.5 73.4 53.74 143.6 11.32 213.8 3.22
5 362.9 75.2 51.41 145.4 10.93 215.6 3.129
6.8 342.8 77 49.19 147.2 10.54 217.4 3.04
8.6 323.9 78.8 47.08 149 10.18 219.2 2.955
10.4 306.2 80.6 45.07 150.8 9.827 221 2.872
12.2 289.6 82.4 43.16 152.6 9.489 222.8 2.792
14 274 84.2 41.34 154.4 9.165 224.6 2.715
15.8 259.3 86 39.61 156.2 8.854 226.4 2.64
17.6 245.6 87.8 37.96 158 8.555 228.2 2.568
19.4 232.6 89.6 36.38 159.8 8.268 230 2.498
21.2 220.5 91.4 34.88 161.6 7.991 231.8 2.431
23 209 93.2 33.45 163.4 7.726 233.6 2.365
24.8 198.3 95 32.09 165.2 7.47 235.4 2.302
26.6 199.1 96.8 30.79 167 7.224 237.2 2.241
28.4 178.5 98.6 29.54 168.8 6.998 239 2.182
30.2 169.5 100.4 28.36 170.6 6.761 240.8 2.124
32 161 102.2 27.23 172.4 6.542 242.6 2.069
33.8 153 104 26.15 174.2 6.331 244.4 2.015
35.6 145.4 105.8 25.11 176 6.129 246.2 1.963
37.4 138.3 107.6 24.13 177.8 5.933 248 1.912
39.2 131.5 109.4 23.19 179.6 5.746 249.8 1.863
41 125.1 111.2 22.29 181.4 5.565 251.6 1.816
42.8 119.1 113 21.43 183.2 5.39 253.4 1.77
44.6 113.4 114.8 20.6 185 5.222 255.2 1.725
46.4 108 116.6 19.81 186.8 5.06 257 1.682
48.2 102.8 118.4 19.06 188.6 4.904 258.8 1.64

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TW30HQ2B4D

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Service Manual

Part Ⅰ : Technical Information........................................................................1

Part Ⅱ : Installation and Maintenance ..................................................22

Part Ⅰ : Technical Information

Outdoor Unit: Remote Controller:

Model of Outdoor Unit TW30HQ2B4DO TW36HQ2B4DO

2.2 Capacity Variation Ratio According to Temperature

Capacity ratio (%)

Outdoor temp. (˚F) Outdoor temp. (˚F)

Heating operation ambient temperature range is -13ºF~75ºF

Capacity ratio (%)

Outdoor temp. (˚F) Outdoor temp. (˚F)

Heating operation ambient temperature range is -31ºF~75ºF

Capacity ratio (%)

2.3 Noise Curve

Indoor side noise Outdoor side noise

Indoor fan motor rating speed Compressor frequency(Hz)

2.4 Cooling and Heating Data Sheet in Rated Frequency

Pressure of gas pipe Inlet and outlet pipe

Pressure of gas pipe Inlet and outlet pipe

70/- 20/19 36K 507~550 134.4 to 102 36 to 39 Super High High 34

3. Outline Dimension Diagram

11 19/32 3 1/2 Unit:inch

3.2 Outdoor Unit

4. Refrigerant System Diagram

Indoor unit Outdoor unit

Cooling and heating model

Indoor unit Outdoor unit

Heat Suction Accumlator

Connection pipe specification:

Cooling only model

Cooling and heating model

Indoor unit Outdoor unit

Heat Suction Accumlator

Connection pipe specification:

Symbol Symbol Color Symbol Symbol Color Symbol Name

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5.2 PCB Printed Diagram

No. Name No. Name No. Name

6. Function and Control

TIMER ON / TIMER OFF

Introduction for icons on display screen

I feel Set fan speed

Introduction for buttons on remote controller

" icon stops blinking.

12. TIMER ON / TIMER OFF button

Function introduction for combination buttons

3. Child lock function

4. Temperature display switchover function

Replacement of batteries in remote controller

indoor unit during operation.

6.2 Ewpe Smart App Operation Manual

Control Flow Chart

intelligent Home Wi-Fi Cellular/

Home wireless router

Requirement for User's smart phone:

iOS system Android system

Download and installation

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