Carel Uc2 Electronic Controller1234
Carel Uc2 Electronic Controller1234
Carel Uc2 Electronic Controller1234
electronic controller
User manual
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
IMPORTANT WARNINGS
CAREL bases the development of its products on several years’ experience in the HVAC field, on
continuous investment in technological innovation of the product, on rigorous quality procedures and
processes with in-circuit and function tests on 100% of its production, on the most innovative production
technologies available on the market. CAREL and its branch offices/affiliates do not guarantee, in any
case, that all the aspects of the product and the software included in the product will respond to the
demands of the final application, even if the product is built according to state-of-the-art techniques. The
client (builder, developer or installer of the final equipment) assumes every responsibility and risk relating
to the configuration of the product in order to reach the expected results in relation to the specific final in-
stallation and/or equipment. CAREL in this case, through specific agreements, can intervene as consultant
for the positive result of the final start-up machine/application, but in no case can it be held responsible
for the positive working of the final equipment/apparatus.
ENGLISH
The CAREL product is a state-of-the-art product, whose operation is specified in the technical documen-
tation supplied with the product or can be downloaded, even prior to purchase, from the website www.
carel.com.
Each CAREL product, in relation to its advanced technological level, needs a phase of definition / con-
figuration / programming / commissioning so that it can function at its best for the specific application.
The lack of such phase of study, as indicated in the manual, can cause the final product to malfunction of
which CAREL can not be held responsible.
Only qualified personnel can install or carry out technical assistance interventions on the product.
The final client must use the product only in the manner described in the documentation related to the
product itself.
Without excluding proper compliance with further warnings present in the manual, it is stressed that in
any case it is necessary, for each Product of CAREL:
• To avoid getting the electrical circuits wet. Rain, humidity and all types of liquids or condensation
contain corrosive mineral substances that can damage the electrical circuits. In any case, the product
should be used and stored in environments that respect the range of temperature and humidity
specified in the manual.
• Do not install the device in a particularly hot environment. Temperatures that are too high can shorten
the duration of the electronic devices, damaging them and distorting or melting the parts in plastic. In
any case, the product should be used and stored in environments that respect the range of temperatu-
re and humidity specified in the manual.
• Do not try to open the device in any way different than that indicated in the manual.
• Do not drop, hit or shake the device, because the internal circuits and mechanisms could suffer
irreparable damage.
• Do not use corrosive chemical products, aggressive solvents or detergents to clean the device.
• Do not use the product in application environments different than those specified in the technical
manual.
All the above reported suggestions are valid also for the control, serial unit, programming key or never-
theless for any other accessory in the product portfolio of CAREL.
CAREL adopts a policy of continuous development. Therefore, CAREL reserves the right to carry out
modifications and improvements on any product described in the present document without prior notice.
The technical data in the manual can undergo modifications without obligation to notice.
The liability of CAREL in relation to its own product is regulated by CAREL’s general contract conditions
edited on the website www.carel.com and/or by specific agreements with clients; in particular, within the
criteria consented by the applicable norm, in no way will CAREL, its employees or its branch offices/affi-
liates be responsible for possible lack of earnings or sales, loss of data and information, cost of substitute
goods or services, damage to things or persons, work interruptions, or possible direct, indirect, incidental,
patrimonial, of coverage, punitive, special or consequential in any way caused damages, be they con-
tractual, out-of-contract, or due to negligence or other responsibility originating from the installation, use
or inability of use of the product, even if CAREL or its branch offices/affiliates have been warned of the
possibility of damage.
Disposal of the product
In reference to European Community directive 2002/96/EC issued on 27 January 2003 and
the related national legislation, please note that:
1. we cannot be disposed of as municipal waste and such waste must be collected and
disposed of separately;
2. the public or private waste collection systems defined by local legislation must be used. In addition,
the equipment can be returned to the distributor at the end of its working life when buying new
equipment.
3. the equipment may contain hazardous substances: the improper use or incorrect disposal of such may
have negative effects on human health and on the environment;
4. the symbol (crossed-out wheeled bin) shown on the product or on the packaging and on the instruc-
tion sheet indicates that the equipment has been introduced onto the market after 13 August 2005 and
that it must be disposed of separately;
5. in the event of illegal disposal of electrical and electronic waste, the penalties are specified by local
waste disposal legislation.
NO POWER
WARNING: separate as much as possible the probe and digital input signal
& SIGNAL cables from the cables carrying inductive loads and power cables to avoid
CABLES
TOGETHER
possible electromagnetic disturbance. Never run power cables (including
READ CAREFULLY IN THE TEXT! the electrical panel wiring) and signal cables in the same conduits.
1. INTRODUCTION 7
1.1 General description...............................................................................................................................7
1.2 User interface.........................................................................................................................................7
2. Connections 9
2.1 General diagram....................................................................................................................................9
2.2 Network layout......................................................................................................................................9
ENGLISH
3. applications 10
3.1 Air/air unit...............................................................................................................................................10
3.2 AIR/AIR heat pump...............................................................................................................................11
3.3 AIR/WATER chiller.................................................................................................................................13
3.4 AIR/WATER heat pump........................................................................................................................14
3.5 WATER/WATER chiller..........................................................................................................................16
3.6 WATER/WATER heat pump with reversal on gas...........................................................................
circuit................................................................................................................................................................17
3.7 WATER/WATER heat pump with reversal on water circuit...........................................................19
3.8 Air-cooled condensing unit without reverse cycle........................................................................20
3.9 Reverse-cycle air-cooled condensing unit.......................................................................................21
3.10 Water-cooled condensing unit without reverse cycle.................................................................22
3.11 Reverse-cycle water-cooled condensing unit................................................................................23
4. parameters 25
4.1 General parameters..............................................................................................................................25
4.2 Menu structure......................................................................................................................................25
4.3 Parameter tables...................................................................................................................................26
6. Table of alarms 49
8. Dimensions 61
9. Codes 63
ENGLISH
• connection to serial line for supervision/telemaintenance;
• elimination of the expansion vessel.
- Driver function
• Management of electronic expansion valves.
1.1.3 Programming
CAREL offers the possibility to configure all the unit parameters not only from the keypad on the front
panel, but also using:
• a hardware key;
• a serial line.
I J
1.2.2 Symbols on the display
Display with 3 green digits (plus sign and decimal point), amber
symbols and red alarm symbols.
H
symbol colour meaning reference refri- G
with LED ON con LED lampeggiante gerant circuit
1; 2 amber compressor 1 and/or 2 ON start up request 1 F
1; 3 amber compressor 3 and/or 3 ON start up request 2
A amber at least one compressor ON 1/2
B amber pump/air outlet fan ON start up request 1/2 E D C B A L K
C amber condenser fan ON 1/2
D amber defrost active defrost request 1/2
E amber heater ON 1/2
F red alarm active 1/2
G amber heat pump mode (P6=0) heat pump mode request 1/2
(P6=0) J
H amber chiller mode (P6=0) chiller mode request (P6=0) 1/2
Table 1.a
H I
G
F L
E D C B A K
Fig. 1.a
1.2.5. Keypad
The keypad is used to set the unit operating values (see Parameters/alarms - Keypad combinations)
PSOPZKEY*:
CONVONOFF*: programming key
ENGLISH
PWM/digital
converter
Fig. 2.a
EV driver
Fig. 2.b
EV driver EV driver
DIN
Fig. 2.c
µC - +030220731 - rel. 1.4 - 26.10.2009
2
9
3. applications
3.1 Air/air unit
Key: 1
1 condernser fan overload 2 4
2 fan
3 condenser probe
4 supply probe 3
5 electrical heater
ENGLISH
6 evaporator
7 supply fan overload
8 supply fan 5
9 compressor 1
10 high pressure
11 compressor overload
12 low pressure 6
13 ambient probe
14 compressor 2
7
9 8
10 11 12
13
14
Fig. 3.a.a
Key:
1 condernser fan overload 1 and 2
1 1 1 2
2 fan 4
3 condenser probe
2 2
4 supply probe
5 electrical heater 1 and 2
6 evaporator 1 e 2 3 3
7 supply fan overload
8 supply fan
9 compressor 1 5 5
10 high pressure 1 and 2 1 2
11 compressor overload 1 and 2
12 low pressure 1and 2
13 ambient probe 1 6 6 2
14 compressor 2
15 compressor 3
16 compressor 4 7 7
9 15
8
10 1 1 11 12 1 2 12 11 2 10 2
14 16
13
Fig. 3.a.b
3 3 Key:
1 1 2
1 condernser fan overload
2 fan
3 condenser probe 1 and 2
2 4 supply probe
5 electrical heater 1 and 2
4 6 evaporator 1 and 2
B2 7 supply fan
8 ambient probe
9 compressor 1
5 1 2 5 10 high pressure 1 and 2
11 compressor overload 1 and 2
ENGLISH
12 low pressure 1and 2
13 compressor 2
1 6 6 2 14 compressor 3
15 compressor 4
9 14
7
10 1 1 11 12 1 2 12 11 2 10 2
13 8 15
Fig. 3.a.c
Key:
1
1 condernser fan overload
2 4
2 fan
3 condenser probe
4 supply probe
B2
3 5 electrical heater
6 evaporator
7 supply fan overload
8 supply fan
9 compressor 1
5 10 high pressure
11 compressor overload
12 low pressure
13 ambient probe
14 compressor 2
6 15 reversing valve
15
7
13
10 11 12
14
Fig. 3.b.a
Key: 1 1 2
1
1 condenser fan overload 1 and 2
2 2
2 fan
3 condernser probe
4 supply probe 3 3
5 electrical heater 1 e 2
6 evaporator 1 and 2
7 supply fan overload
8 supply fan
9 compressor 1 4
10 high pressure 1 e 2
11 compressor overload 1 and 2 B2
ENGLISH
15 1 2 15
7 7
9 8 16
10 11 12 13 12 11 10
1 1 1 2 2 2
14 17
Fig. 3.b.b
9 8
16
13
10 1 1 11 12 1 2 12 11 2 10 2
14 17
Fig. 3.b.c
1 Key:
2 1 condernser fan overload
2 fan
3 condenser probe
3 4 flow switch
4 5 outlet evaporator probe
6 fan
7 antifreeze heater
8 inlet evaporator probe
5
ENGLISH
9 compressor 1
10 high pressure
11 compressor overload
12 low pressure
13 water pump
14 compressor 2
6 7
13
10 11 12
14
Fig. 3.c.a
Key:
1 1 2 1
4 1 condenser fan overload 1 and 2
1 2 2 2 2 fan 1 and 2
5 3 condenser probe 1 and 2
1 3 2 3 4 flow switch
5 outlet temperature probe
6 evaporator 1 and 2
7 1 7 outlet evaporator probe 1 and 2
8 antefreeze heater 1 and 2
9 compressor 1
2 7 10 high pressure 1 and 2
11 compressor overload 1 and 2
12 low pressure 1and 2
6 6 13 inlet evaporator probe
1 8 1 2 8 2
14 compressor 2
15 water pump
16 compressor 3
17 compressor 4
9 16
13
10 1 1 11 12 1 12 11 10
15
14 17
Fig. 3.c.b
Key: 1
1 3 2 3
1 condenser fan overload
2 fan
3 condenser probe 1 and 2 2
4 flow switch
5 outlet temperature probe
4
6 evaporator 1 and 2
7 outlet evaporator probe 1 and 2
8 antifreeze heater 1 and 2 5
9 compressor 1
10 high pressure 1 and 2
11 compressor overload 1 and 2
ENGLISH
9 16
13
10 1 1 11 12 1 2 12 11 2 10 2
15
14 17
Fig. 3.c.c
Key: 1
1 condenser fan overload 2
2 fan
3 sonda condensatore
4 flow switch
3
5 outlet evaporator probe
6 evaporator
7 antifreeze heater 4
8 inlet evaporator probe
9 compressor 1
10 high pressure 5
11 compressor overload
12 low pressure
13 water pump
14 compressor 2
6
7
10 11 12 13
14
Fig. 3.d.a
1 1 1 2 Key:
1 2 4 2 2 1 condenser fan overload 1 and 2
2 fan 1 and 2
3 3 condenseer probe 1 and 2
1 5 2 3
4 flow switch
5 outlet temperature probe
6 evaporator 1 and 2
7 outlet evaporator probe 1 and 2
7 1 8 antifreeze heater 1 and 2
9 compressor 1
2 7 10 high pressure 1 and 2
11 compressor overload 1 and 2
ENGLISH
1 6 6 2 12 low pressure 1 and 2
13 inlet evaporator probe
16 8 1 2 8 16 2 14 compressor 2
1
15 water pump
16 reversing valve 1 and 2
17 compressor 3
18 compressor 4
13
9 17
10 1 1 11 12 1 2 12 11 2 10 2
15
14 18
Fig. 3.d.b
1 3 2 3 Key:
1
1 condenser fan overload
2 fan
2 3 condenser probe 1 and 2
4 flow switch
5 outlet temperature probe
4 6 evaporator 1 and 2
7 outlet evaporator probe 1 and 2
5 8 antifreeze heater 1 and 2
9 compressor 1
10 hih pressure 1 and 2
11 compressor overload 1 and 2
12 low pressure 1 and 2
7 1 13 inlet evaporator probe
2 7 14 compressor 2
15 water pump
1 6 6 16 reversing valve 1 and 2
2
17 compressor 3
8 8 16
16 1
1 2 2 18 compressor 4
13
9 17
15
10 1 1 11 12 1 2 12 11 2 10 2
18
14
Fig. 3.d.c
Key:
1 water condensing temperature probe 3
2 condensator
3 flow switch
4 outlet evaporator probe 1 4
5 evaporator
6 antifreeze heater
7 inlet evaporator probe
8 compressor 1
9 high pressure 2
10 compressor overload
ENGLISH
11 low pressure 6
12 water pump 5
13 compressor 2
7
8
9 10 11 12
13
Fig. 3.e.a
Key:
1 water condensing temperature probe 1 and 2
2 condensator 1 and 2 3
3 flow switch
4 outlet evaporator probe
5 evaporator 1 4 1
1 2
6 antifreeze heater 1 and 2
7 compressor 1
8 high pressure 1 and 2
9 compressor overload 1 and 2
10 low pressure 1 and 2
11 inlet evaporator probe 2 1 2
2
12 water pump
13 compressor 2
14 compressor 3 6
15 compressor 4
5
7 14
11
8 1 1 9 10 1 2 10 9 2 8 2
12
13 15
12
Fig. 3.e.b
Key:
3 1 water condensing temperature probe 1 and 2
2 condensator 1 and 2
4 3 flow switch
4 outlet temperature probe
1 5 outlet evaporator probe 1 and 2
1 1 2 6 antifreeze heater 1 and 2
5 7 evaporator
1 5
2 8 water pump
9 compressor 1
2 2 2 10 high pressure 1 and 2
ENGLISH
1 11 compressor overload 1 and 2
12 low pressure 1 and 2
7 6 2 6 7
1
1
2 13 compressor 3
14 compressor 2
15 compressor 4
16 inlet evaporator pressure
9 13
16
10 1 1 11 12 1 2 12 11 2 10 2
8
14 15
Fig. 3.e.c
3
Key:
1 condenser probe
1 2 condenser
4
3 flow switch
4 outlet evaporator probe
5 antifreeze heater
2 6 reversing valve
5 7 inlet evaporator probe
8 compressor 1
9 high pressure
10 compressor overload
11 low pressure
6 12 water pump
13 compressor 2
7
8 12
9 10 11
13
Fig. 3.f.a
Key:
3
1 water condensing temperature probe 1 and 2
2 condensator 1 and 2
3 flow switch 4
4 outlet evaporator probe
5 outlet evaporator probe 1 and 2 1 1 5 1
1 2
6 evaporator 1 and 2
7 antifreeze heater 1 and 2 5
2
8 water pump
9 compressor 1 2 2
2 1
10 high pressure 1 and 2 7 7
ENGLISH
9 15
8
10 1 1 11 12 1 2 12 11 2 10 2
14 17
Fig. 3.f.b
Key:
3
1 condenser probe 1 and 2
2 condenser 1 and 2 4
3 flow switch 1 1 1 2
4 outlet evaporator probe
5 evaporator
6 antifreeze heater 1 and 2
7 compressor 1 2 1 2
2
8 high pressure 1 and 2
9 compressor overload 1 and 2 6 5 6
1 2
10 low pressure 1 and 2
11 inlet evaporator probe
12 water pump 1 2
13 compressor 2
14 14
14 reversing valve 1 and 2 11
15 compressor 3
16 compressor 4
7 15
8 1 1 9 10 1 2 10 9 2 8 2
12
13 16
12
Fig. 3.f.c
1 2 Key:
1 external
2 internal
3
3 reversing valve
4 4 flow switch
5 outlet evaporator probe
5 6 antifreeze heater
7 evaporator
8 condenser
8 9 condenser probe
ENGLISH
7 10 compressor 1
6
11 high pressure
12 compressor overload
13 low pressure
10 14 water pump
9 15 compressor 2
11 12 13
14
15
1 2
Fig. 3.g.a
1 2
3
Key:
4 5 1 external
2 internal
6
3 reversing valve 1 and 2
4 condenser probe
5 flow switch
6 outlet evaporator probe
9
7 1
9 7 7 condenser probe 1 and 2
1 2 2
8 condenser 1 and 2
9 outlet evaporator probe 1 and 2
8 1
8 10 antifreeze heater 1 and 2
2
1 11 10 1 10 2 11 2
11 evaporator 1 and 2
12 compressor 1
13 high pressure 1 and 2
14 compressor overload 1 and 2
16 15 low pressure 1 and 2
12 16 compressor 3
17 17 inlet evaporator probe
18 water pump
19 compressor 2
13 1 14 1 15 1 2 15 14 2 13 2 20 compressor 4
18
18
19 3 20
1 2
Fig. 3.g.b
1 2
Key: 3
1 external
2 internal
3 reversing valve 1 and 2 4
4 condenser probe
5
5 flow switch
6 outlet evaporator probe 6
7 condenser probe 1 and 2
8 condenser 1 and 2
9 outlet evaporator probe 1 and 2 7 7 2
1
ENGLISH
13 1 14 1 15 1
17 15 14 13
2 2 2
18 17 19
3
1 2
Fig. 3.g.c
1
Key:
1 condenser fan overload
2
2 fan
3 condenser probe
4 compressor 1 3
5 high pressure
6 compressor overload
7 low pressure
8 compressor 2
5 6 7
Fig. 3.h.a
1 1 Key:
ENGLISH
4 9
5 1 1 6 7 1 5 2 2 6 7 2
8 10
Fig. 3.h.b
1
2
Key:
3 1 condenser fan overload
2 fan
3 condenser probe
4 compressor 1
5 high pressure
6 compressor overload
7 low pressure
8 compressor 2
9 reversing valve
5 6 7
Fig. 3.i.a
Key:
1 condenser fan overload
2 fan 1
3 condenser probe
4 compressor 1
5 high pressure 1 and 2
6 compressor overload 1 and 2 2
7 low pressure 1 and 2
8 compressor 2 3 3
9 compressor 3
10 compressor 4
11 reversing valve
ENGLISH
11 11
4 9
5 1 1 6 7 1 5 2 2 6 7 2
8 10
Fig. 3.i.b
Key:
1
1 flow switch
2 water cond. temperature probe
3 condenser
4 compressor 1 2
5 high pressure
6 compressor overload
7 low pressure
8 compressor 2
3 11
5 1 6 7
Fig. 3.j.a
1
Key:
B7 1 flow switch
2 water cond. temperature probe
2 2 3 condenser
4 compressor 1
5 high pressure
6 compressor overload
7 lw pressure
3 3
8 compressor 2
9 compressor 3
ENGLISH
10 compressor 4
11 water pump
4 9
5 1 1 6 7 1 5 2 2 6 7 2
8 10
11
Fig. 3.j.b
Key:
1 condenser probe
1 2 2 condenser
3 antifreeze heater
4 compressor 1
5 high pressure
6 compressor overload
7 low pressure
3 8 compressor 2
9 reversing valve
5 6 7
Fig. 3.k.a
Key:
1 condenser probe
2 condenser 1 and 2
3 antifreeze heater 1 and 2 1 2 1 2
1 2
4 reversing valve
5 compressor 1
6 high pressure 1 and 2
7 compressor overload 1 and 2
8 low pressure 1 and 2 3 1 3 2
9 compressor 3
10 compressor 2
11 compressor 4
ENGLISH
12 water pump 4 4
5 9
12
6 1 1 7 8 1
6 2 2 7 8 2
10 11
Fig. 3.k.b
ENGLISH
• User parameters: Accessible with password 22, allow the configuration of the parameters that typically
can be set by the user (User parameters) and the Direct parameters, consequently relating to the options.
• Direct parameters: Accessible without password, this are used to read the probe measurements and
any data, by any user, without compromising the operation of the unit.
N.B.: The modifications to the parameters regarding the configuration of the unit (type, number of
compressors,…) must be performed with the controller in Standby. level level name password
_d_ direct no password
_U_ user 22
_S_ super user 11
_F_ factory 66
4.2 Menu structure
main menù F or 5”
setting password
Or Or parameter level
parameter
values
parameters /*
parameters r*
parameters b*
regulation
probes
parameters c*
parameters P*
alarm compressor
parameters D*
parameters H*
parameters F* defrost
unit setting
fan
Or
parameters Fn
Fig. 4.a
µC - +030220731 - rel. 1.4 - 26.10.2009
2
25
4.3 Parameter tables
The following tables show of the parameters divided by type/family (e. g. compressor, probes, fans etc.).
• Key to the parameter tables
Level (default)
S= super user
F= factory
D= direct
Visibility:
The visibility of some groups depends on the type of controller and the value of the parameters.
D= defrost (if D01=1)
F= fan (if F01=1)
N= NTC probe (if /04-/08=2)
P= pressure (if /04-/08=3)
ENGLISH
/09 Min. value voltage input F 0 /10 0.01 Vdc 1 50 P 18 (R/W) 146 Integer
/10 Max. value voltage input F /09 500 0.01 Vdc 1 450 P 19 (R/W) 147 Integer
/11 Pressure min. value F 0 /12 bar 1 0 P 1 (R/W) 1 Analog
/12 Pressure max. value F /11 99.9 bar 1 34.5 P 2 (R/W) 2 Analog
/13 Probe B1 calibration F -12.0 12.0 °C/°F 0.1 0.0 - 3 (R/W) 3 Analog
/14 Probe B2 calibration F -12.0 12.0 °C/°F 0.1 0.0 - 4 (R/W) 4 Analog
/15 Probe B3 calibration F -12.0 12.0 °C/°F 0.1 0.0 - 5 (R/W) 5 Analog
/16 Probe B4 calibration F -12.0 12.0 °C/bar/°F 0.1 0.0 - 6 (R/W) 6 Analog
/17 Probe B5 calibration F -12.0 12.0 °C/°F 0.1 0.0 X 7 (R/W) 7 Analog
/18 Probe B6 calibration F -12.0 12.0 °C/°F 0.1 0.0 X 8 (R/W) 8 Analog
/19 Probe B7 calibration F -12.0 12.0 °C/°F 0.1 0.0 X 9 (R/W) 9 Analog
/20 Probe B8 calibration F -12.0 12.0 °C/bar/°F 0.1 0.0 X 10 (R/W) 10 Analog
/21 Digital filter U 1 15 - 1 4 - 20 (R/W) 148 Integer
/22 Input limitation U 1 15 - 1 8 - 21 (R/W) 149 Integer
/23 Unit of measure 0= °C U 0 1 Flag 1 0 - 5 (R/W) 5 Digital
1= °F
Table 4.a
ENGLISH
0= disabled function
1= Heaters and pump on at the same time on A4/A8
2= Heaters and pump on indipendently on A4/A8
3= Heaters ON on A4/A8
Table 4.b
d05 Min. time to start a defrosting cycle U 10 150 s 1 10 D 37 (R/W) 165 Integer
d06 Min. duration of a defrosting cycle U 0 150 s 1 0 D 38 (R/W) 166 Integer
d07 Max. duration of a defrosting cycle U 1 150 min 1 5 D 39 (R/W) 167 Integer
d08 Delay between 2 defrosting cycle requests within the same circuit U 10 150 min 1 30 D 40 (R/W) 168 Integer
d09 Defrosting delay between the 2 circuits U 0 150 min 1 10 D 41 (R/W) 169 Integer
d10 Defrost by external contact F 0 3 Flag 1 0 D 42 (R/W) 170 Integer
0= disables function
1= external contact start
2= external contact end
3= external contact start and end
d11 Antifreeze heaters activated while defrosting U 0 1 Flag 1 0 D 9 (R/W) 9 Digital
0= Non presenti/Not present; 1= Presenti/Present
d12 Waiting time before defrosting F 0 3 min 1 0 D 43 (R/W) 171 Integer
d13 Waiting time after defrosting F 0 3 min 1 0 D 44 (R/W) 172 Integer
d14 End defrosting with 2 refrigerating circuits F 0 2 Flag 1 0 D 45 (R/W) 173 Integer
0= Indipendent
1= If both at end defrost
2= If at least one at end defrost
d15 Start defrost with 2 circuits F 0 2 Flag 1 0 D 46 (R/W) 174 Integer
0= Indipendent
1= If both at start defrost
2= If at least one at start defrost
d16 Forced ventilation time at the end of the defrosting F 0 360 s 1 0 D 47 (R/W) 175 Integer
d17 Defrost with compressors OFF F 0 80.0 °C/°F 0.1 0 D 22 (R/W) 22 Analog
Table 4.e
ENGLISH
H02 Number of condensers 0=1 circuit; 1=2 circuits F 0 1 Flag 1 0 F 12 (R/W) 12 Digital
H03 Number of evaporators F 0 1 Flag 1 0 - 13 (R/W) 13 Digital
0=1 evaporator
1=2 evaporators
H04 Number of compressors per circuit F 0 5 Flag 1 0 - 55 (R/W) 183 Integer
0=1 comp. ON 1 circuit (single circuit)
1=2 comp. in tandem ON 1 circuit (single circuit)
2=1 comp. per circuit, 2 circuits (two circuits)
3=2 comp. in Tandem, 2 circuits (two circuits)
4=1 compressor and 1 Capacity step in one circuit
5=1 compressor and 1 capacity Step per circuit
H05 Pump/outlet fan (Air/Air) mode (output N2) F 0 5 Flag 1 1 - 56 (R/W) 184 Integer
0= absent
1= always ON
2= ON upon request of the controller
3= ON upon request of the controller and for set time
H06 Cooling/Heating digital input U 0 1 Flag 1 0 - 14 (R/W) 14 Digital
0= absent
1= present
H07 ON/OFF digital input U 0 1 Flag 1 0 - 15 (R/W) 15 Digital
0= absent
1= present
H08 µC2 network configuration F 0 3 Flag 1 0 - 57 (R/W) 185 Integer
0= µC2 only
1= µC2 + valve
2= µC2 + exp.
3= µC2 +exp.+valve
H09 Lock keypad U 0 1 Flag 1 1 - 16 (R/W) 16 Digital
0= disabled
1= enabled
H10 Serial address U 1 200 - 1 1 - 58 (R/W) 186 Integer
H11 Output modes (see Table 5.3 and following pag. 56) F 0 12 Flag 1 0 - 59 (R/W) 187 Integer
H12 Capacity- control logic valve and inversion valve F 0 3 Flag 1 1 - 60 (R/W) 188 Integer
0= Both normally closed
1= Both normally open
2= Inversion valve normally open and capacity-control valve normally closed
3= Inversion valve normally closed and capacity-control valve normally open
H21 Second pump function F 0 4 int 1 0 - 62 (R/W) 269 Integer
0= Disabled
1= Backup and weekly rotation
2= Backup and daily rotation
3= Condensing control on corresponding set point
4= Condensing control always on
H22 Disable load default values F 0 1 Flag 1 0 - 18 (R) 18 Digital
0= Function disabled
1= Function enabled
H23 Enable Modbus protocol F 0 1 Flag 1 0 - 11 11 Digital
Table 4.g
ENGLISH
4.3.10 Firmware parameters (F-r*)
display parameter and description default min. max. U.O.M. variat. def. visibility supervis. Modbus variabile type
indicat. level variable
H96 Software version Driver 2 D 0 999 flag XV 4 (R) 132 Integer
H97 Software version Driver 1 D 0 999 flag V 3 (R) 131 Integer
H98 Expansion software version D 0 999 flag X 2 (R) 130 Integer
H99 Software version (to be displayed after instrument D 0 999 flag - 1 (R) 129 Integer
start-up)
Table 4.j
Type of unit Parameter H01 Temp. control Antifreeze probe Cond. temp. Press probe Antifreeze Cond. temp. Press. probe
probe 1st circuit probe 1st circuit probe probe 2nd circuit
1st circuit 2nd evaporator 2nd circuit
0= air/air B1 B2 (low outlet B3 B4 Not used B7 B8
temperature)
ENGLISH
- Probe calibration
From /13 to /20: calibrates the corresponding sensor (from B1 to B8).
- Digital filter
/21: Establishes the coefficient used in the digital filtering of the value measured. High values for this
parameter will eliminate any continuous disturbance at the analogue inputs (however decrease the
promptness of measurement). The recommended value is 4 (default).
- Input limit
/22: Establishes the maximum variation that can be measured by the probes in one unit program cycle;
in practice, the maximum variations allowed in the measurement are between 0. 1 and 1.5 units (bars, °C
or °F, depending on the probe and the unit of measure) approximately every one second. Low values for
this parameter will limit the effect of impulsive disturbance. Recommended value 8 (default).
- Unit of measure
/23: Selects the unit of measure as degrees centigrade or Fahrenheit. When the parameter is modified,
the µC2 automatically converts the values read by the NTC temperature probes B1, B2, B3 into the new
unit of measure; while all the other parameters set (set point, differential etc. ) remain unchanged.
• Antifreeze, auxiliary heater: parameters (A*)
- Antifreeze alarm set point (low ambient temp. for air/air units)
A01: This represents the temperature (antifreeze set point) of the water at the evaporator outlet below
which an antifreeze alarm is activated; in this condition the compressors corresponding to the
circuit in question are stopped, while the pump remains on to decrease the possibility of freezing. The
alarm is reset manually (or automatically, depending on parameter P05) only when the water temperatu-
re returns within the operating limits (that is, above A01+A20).
In the Air/Air units (H1=0,1) the value represents the low room temperature warning threshold; this
alarm, activated according to value read by probe B1 or B2 (depending on parameter A06) is signal only,
and is reset depending on the value of P05.
Example of antifreeze/outlet limit management
If probe B2 is placed in the outlet air flow (air/air units), A01 becomes the outlet limit, and if the outlet
1 probe reading (B2) < outlet limit (A1) then:
1. bypass waiting time A3;
ON 2. stop the compressors; if already off go to pt. 4;
3. bypass waiting time A3;
OFF 4. close damper with 50% duty cycle if FC active and the ambient temperature means damper open or
A1 A1+A2 2 dead zone. If FC is not active go to pt. 6;
5. bypass waiting time A3 after having closed r28 twice (from the end of the last period);
6. If B2 < A1 the alarm “A1” is activated. The alarm reset depends on P5.
Key:
1. freecooling or comp 2. probe B2
32 µC2 - +030220731 - rel. 1.4 - 26.10.2009
- Antifreeze/low room temperature (air/air) alarm differential
A02: This represents the differential for the activation of the antifreeze alarm (low room temperature
in air/air units); the alarm condition cannot be reset until the temperature exceeds the set point +
differential (A01+A02).
- Antifreeze alarm bypass time low room temperature from unit start in heating mode
A03: This represents the delay in the activation of the antifreeze alarm when starting the system. In the
case of air/air units, this parameter represents the delay time for the low room temperature (return-intake
air) signal, only in heating mode. This means that the room being heated is too cold (threshold set by the
user).
ENGLISH
In the air/air heat pumps (H01=1) the auxiliary heaters are not used in cooling mode.
ON
- Start delay between compressors
1 c04: This sets the delay between the starts of the two compressors, so as to reduce the peak power input
OFF and make the compressors start more smoothly. The compressor LED flashes in this phase.
ON • In the event of capacity control, the delay c04 between compressor and valve becomes c04/2;
2
OFF
• In the event of defrost operation, the delay between compressor and compressor is 3 seconds, and
ON between compressor and valve is 2 seconds.
3
OFF
Key:
ON
4
1. 1st signal;
OFF 2. 2nd signal;
C4 3. 1st compressore;
5 4. 2nd compressor;
5. time delay between two compressors ON routines/time-delay of the capacity-controlled routine.
Fig. 5.a.e
Fig. 5.a.f
34 µC2 - +030220731 - rel. 1.4 - 26.10.2009
- Delay on power-up (reset power supply)
c06: At power ON (when the controller is physically switched ON) the activation of all the outputs is delayed so
as to distribute the power input and protect the compressor against repeated starts in the event of frequent power
failures. This means that after the delay time, the controller will start to manage the outputs based on the other
times and the other normal functions.
ENGLISH
2. pump;
3. compressor; Fig. 5.a.g
4. time-delay between pump-inlet fan and compressor.
3. inlet fan;
Fig. 5.a.h
4. time-delay between pump-inlet fan and compressor.
C7 C8 C7 C8
• Defrost settings: parameters (d*)
1 The defrost has priority over the compressor times.
For the defrost function the compressors times are ignored, with the exception of C04 (see C04 descrip-
2 tion for the exceptions).
C18 C17 C18 C17 C18 C17 C18 C17
Key:
3
1. compressor;
2. pump;
3. burst.
Fig. 5.a.i
- Type of defrost
d02: establishes the type of defrost.
d02=0: the defrost has a fixed duration that depends on 007
d02=1: the defrost starts and ends according to the temperature or pressure thresholds, see d03 and d04;
d02=2: the pressure transducer and temperature probe are both located on the outside exchanger; the defrost
starts when the value read by the pressure transducer is below the threshold d03 and ends when the value read by
the temperature probe is above the threshold d04; during the defrost, the pressure probe controls the fan speed,
as in chiller mode, so as to limit the pressure, even if the NTC probe, caked by ice, delays the end defrost. In any
case, after the maximum time allowed for the defrost, the unit will always exit the defrost procedure.
ENGLISH
- Defrost delay between the 2 circuits
d09: Represents the minimum delay between the defrost cycles on the 2 circuits.
Only at the end of this time will the cycle switch back to heat pump mode, with the normal management
of the fans.
Fig. 5.a.k
1 3 1 3
100 %
F05 F08
F04 F04
F03 F03
0% 0%
2 2
F07 F06 F09 F10
Fig. 5.a.l
ENGLISH
- Maximum voltage threshold for Triac
F04: In the event of fan speed control, the optional phase cutting cards (MCHRTF*) are required, fitted
with a triac. The voltage delivered by the triac to the electric fan motor corresponding to the maximum
speed must be set. The set value does not correspond to the actual voltage in Volts applied, but rather to
an internal unit of calculation in the µC2.
If using FCS controllers, set this parameter to 100.
F04 = Represents the maximum threshold for the triac
1 F02= 2 1
F02= 3
2 2
ENGLISH
3 5 3 5
5 5
4 4
Key:
1. condensing temperature
5 5
pressure Fig. 5.a.o Fig. 5.a.p
2. F05-F07+ hysteresis
3. compressor
4. speed %
5. time Heating + compressor ON + NTC probe (F11≠0) Heating + compressor ON + NTC cond. probe
1 1
F02= 2 F02= 3
8 9 8 9
8 8
8 9
2 2
3 5 3 5
5 5
4 4
5 5
Fig. 5.a.q Fig. 5.a.r
ENGLISH
- Unit model
H01: Used to select the type of unit being controlled:
H01= 0: 0: air/air units
H01= 1: AIR/AIR heat pump
H01= 2: AIR/WATER Chiller
H01= 3: AIR/WATER heat pump
H01= 4:WATER/WATER Chiller
H01= 5: water/water heat pump with rev. on gas (*)
H01= 6: water/water heat pump with rev. on water (*)
H01= 7: air-cooled condensing unit
H01= 8: air-cooled condensing unit with reversal on gas circuit
H01= 9: water-cooled condensing unit
H01= 10: water-cooled unit condensing with reversal on gas circuit
(*) Note: Set H21= 4 (Condenser pump always on), if H02= 1 (Two condensers).
- Number of evaporators
H03: This establishes the number of evaporators present when there are 2 or 4 compressors, obviously
with 2 circuits (including the expansion). With one evaporator (H03=0), the management of the heaters
and the antifreeze function is performed only on B2. Vice-versa, with 2 evaporators (H03=1) antifreeze
control will be performed using B2 and B6, while input B5 is used to control the water outlet temperatu-
re.
- Number of compressors/circuits
H04: This establishes the number of compressors per circuit and the number of circuits. For further
details see Table 4.g.
- Enable keypad
H09: Used to disable the modification of the DIRECT and USER parameters from the keypad. The
value of the parameters can always be displayed. The enable/disable cooling, heating and reset counter
functions are also available.
Values:
0: keypad disabled
1: keypad enabled (default)
ENGLISH
- Serial address
H10: Establishes the address of the instrument for the serial connection, via an optional board, to a PC
for supervision and/or telemaintenance.
H11= 0: standard (default); for units with one compressor per circuit (H04=0, 2).
H11= 1: For cooling only units with two compressors (H01=0, 2, 4, 7, 9 and H04=1, 3, 5)
H11= 2: The outputs of the expansion follow the same logic for the 2nd circuit. For H01= 1, 3, 5, 6, 8, 10 and H04=
1, 3, 5
H11= 3: The outputs of the expansion follow the same logic for the 2nd circuit. For H01= 1, 3, 5, 6, 8, 10 and H04=
1, 3, 5
H11= 4: For H01= 1, 3, 5, 6, 8, 10 and H04= 0, 1
H11= 5: For cooling only units with two compressors (H01= 0, 2, 4, 7, 9, and H04= 0)
associazione agli organi dell’unità
uscite H11=0 H11= 1 H11= 2 H11= 3 H11= 4 H11= 5
C1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1 compressor 1
C2 heater 1 heater 1 heater 1 reversing valve 1 reversing valve 1 heater 1
C3 Pump/evaporator (fan) (on Pump/evaporator (fan) (on Pump/evaporator (fan) (on Pump/evaporator (fan) (on evaporator pump Pump/evaporator (fan) (on
air/air units) air/air units) air/air units) air/air units) air/air units)
C4 reversing valve 1 Compressor 2 (or capacity Compressor 2 (or capacity Compressor 2 (or capacity Compressor 2 (or capacity condenser fan 1
control comp. 1) control comp. 1) control comp. 1) control comp. 1)
C5 alarm alarm reversing valve 1 alarm alarm alarm
C6 compressor 2 compressor 3 compressor 3 compressor 3 not used compressor 2
C7 heater 2 heater 2 heater 2 reversing valve 2 heater 1 heater 2
C8 Condenser pump/backup Condenser pump/backup Condenser pump/backup Condenser pump/backup Condenser pump/backup Condenser pump/backup
C9 reversing valve 2 Compressor 4 (or capacity Compressor 4 (or capacity Compressor 4 (or capacity not used condenser fan 2
control comp. 2) control comp. 2) control comp. 2)
C10 Warning Warning reversing valve 2 Warning Warning Warning
- Capacity-control logic
H12: Specifies the logic for the activation of the capacity-control steps for the compressors and the 4-way
reversing valve.
H12 = 0: 4-way reversing valve and capacity-control normally energised
H12 = 1: 4-way reversing valve and capacity-control normally de-energised. Default value.
H12 = 2: 4-way reversing valve normally de-energised and capacity-control normally energised
H12 = 3: 4-way reversing valve normally energised and capacity-control normally de-energised.
Note: in the event of capacity-control, the rotation between compressor and corresponding valve is disa-
bled. FIFO or time logic can be used between the 2 circuits to optimise the starts or the operating hours
of the 2 compressors (1 per circuit).
ENGLISH
H23 = 1: Modbus protocol
- Alarm reset
P05: Enables automatic reset for all those alarms that normally feature manual reset (high pressure, low
pressure, flow switch/antifreeze) as per the following table:
P05= 0: (default) high pressure, low pressure and antifreeze (low temperature) with manual reset;
P05= 1: all the alarms with automatic reset;
P05= 2: high pressure and antifreeze (low temperature) manual, low pressure automatic;
P05= 3: high pressure manual, low pressure and antifreeze (low temperature) automatic;
P05= 4: high and low pressure manual, antifreeze (low temperature) automatic;
P05= 5: high and low pressure manual after the third activation in one hour*, antifreeze (low tempera-
ture) automatic;
P05= 6: high and low pressure manual after the third activation in one hour*, antifreeze (low tempera-
ture) manual.
*: the high and low pressure alarms are managed in the same way both for the transducers and the
pressure switches (digital input); if the unit is in standby the count (3 times in one hour) is reset.
- Cooling/Heating logic
P06: If this parameter is set to 1, the operating logic of the Cooling/Heating logic is reversed (from the
keypad, the remote control and the digital input).
Symbol P06= 0 P06= 1
Cooling (Chiller) Heating (heat pump)
Heating (heat pump) Cooling (Chiller)
P08= 13: second set point from external contact (cooling and heating), (normally open);
P08= 14: second cooling set point from external contact and heating from time band (N.O.);
P08= 15: end defrost from external contact circuit 1 (N.C.);
P08= 16: end defrost from external contact circuit 2 (N.C.);
P08= 17: end defrost from external contact circuit 1 (N.C.);
P08= 18: end defrost from external contact circuit 2 (N.C.);
P08= 19: condenser step 1 (N.O.);
P08= 20: condenser step 2 (N.O.);
P08= 21: condenser step 3 (N.O.);
P08= 22: condenser step 4 (N.O.);
note 1: if P08 is set to 10, the change in state considers the times d12 and d13, and respects the compres-
sor protection times, both from the digital input and the keypad.
note 2: if the digital input is used to switch the unit ON/OFF or change the operating mode, these
functions are disabled on the keypad.
- Compressor rotation
r05: The rotation of the compressors allows the operating hours to be balanced either statistically, using
FIFO logic, or absolutely, by counting the effective operating hours.
Settings:
r05=0: rotation disabled; The customer can use compressors with different power ratings according
ENGLISH
to the desired logic or manage the capacity-control functions. The compressors are started/stopped in
proportional mode.
r05=1: rotation with FIFO logic (first ON, first OFF, and vice-versa first OFF, first ON); in this mode the
operating hours are optimised together with the number of starts, even if the compressor safety times are
always respected.
r05=2: rotation with control of operating hours; in this way the compressors will have the same operating
hours, as the compressor with the least operating hours is always started first, again observing the safety
times. This does not however consider FIFO logic and does not optimise the starts and stops.
In the case of capacity controlled compressors (1 per circuit), FIFO logic or timed operation will refer to
the actual circuit and not the compressor valves. If, for example, when capacity is required from circuit 1,
compressor 1 starts first, capacity controlled (not at full capacity), and then the valve is managed as a se-
cond step, so that the compressor will work at maximum efficiency. If less capacity is required, the second
step will be deactivated first, and then the compressor. There is no rotation between the compressor and
the valve. If extra capacity is required, the second circuit will start with compressor 2 and then, if required,
the valve is operated.
When stopping, the valve is managed first and then the actual compressor as a whole. Both FIFO logic
and timed operation will involve either one circuit or the other. The activation and deactivation of the val-
ves are not subject to timers, but rather only a hysteresis that is equal to the set point and the differential
of the step (in fact the valve performs the same function as a hermetic compressor).
r05=3: direct correspondence between the digital inputs and the compressor relays (condensing units
only).
In heat pump (heating) mode, the dead zone moves the heating proportional band below the set point
by the value r07.
Fig. 5.b.e
In the same way as for the activation time, the deactivation time also varies between a maximum value,
set for the parameter r10 and corresponding to the set point temperature, and a minimum, set for the
parameter r11 corresponding to the end of the differential for the deactivation of the compressors, set by
r01 the parameter r12.
temperature Below this value, the deactivation time will be equal to the minimum set until reaching the temperature
A1 A4 r01-r12 compressor A04, after which all the compressors will be switched OFF, irrespective of the times. As the temperature
stop compressors deactivation differential moves away from the set point, the response of the process becomes more dynamic.
Fig. 5.b.f
r09
temperature
r03+r07-4 r03+r07 r03
Fig. 5.b.g
r11
temperaturw
r03 r03+r12
deactivation
differential
Fig. 5.b.h
ENGLISH
positive, the set point increases as the outside temperature increases (measured by the outside probe); if 50
on the other hand r17 is negative the set point decreases as the outside temperature increases.
This difference in the set point from the set value can have a maximum absolute value equal to the set- 3
40
ting of r18. The values for the parameters shown on the graph are: r17=±2, r01=25, r19=32 and r18=5).
1 4
Key:
1. temperature; 30
5 r18
2. time;
6 r18
3. external temperature (probe B3/B4); 20
4. comp. start temperature (r19); 7
5. positive compensation (r17= 2);
6. set point (r1); 10
7. negative compensation (r17=-2). 2
Fig. 5.b.i
Key: 1 2
1. chiller; on on
2. chiller in low load;
3. heat pump; off off
4. heat pump in low load; r01 r01 + r02 5 r01 r01 + r29 5
5. temperature. Fig. 5.b.m
3 4
on on
off off
r03 - r04 r03 5 r03 - r30 r03 5
Fig. 5.b.n
alarm alarm type resetting Compres- pump fan heater Valve alarm warning superv. superv. variab. variab.
display sor variable description type
HP1 High pressure Depends on P05 OFF C1-2 - ON(60”) - - ON - 31 (R) Circuit 1 alarm Digital
HP2 High pressure Depends on P05 OFF C3-4 - ON(60”) - - ON - 32 (R) Circuit 2 alarm Digital
LP1 Low pressure Depends on P05 OFF C1-2 - OFF 1 - - ON - 31 (R) Circuit 1 alarm Digital
ENGLISH
LP2 Low pressure Depends on P05 OFF C3-4 - OFF 2 - - ON - 32 (R) Circuit 2 alarm Digital
PL1 Capacity-control for low Automatic OFF C2 - - - - - ON - Signal on display -
pressure circuit 1
TP General overload Depends on P08 OFF OFF OFF - - ON - 35 (R) General warning Digital
tC1 Circuit 1 overload Depends on P08 OFF C1-2 - OFF 1 - - ON - 31 (R) Circuit 1 alarm Digital
tC2 Circuit 2 overload Depends on P08 OFF C3-4 - OFF 2 - - ON - 32 (R) Circuit 2 alarm Digital
LA advice Depends on P08 - - - - - ON* ON 40 (R) General advice Digital
FL Flow controller alarm Depends on P08 OFF OFF OFF - - ON - 35 (R) General alarm Digital
FLb Backup pump warning Automatic - - - - - - ON 40 (R) General advice Digital
E1 Probe B1 alarm Automatic OFF OFF OFF OFF - ON - 36 (R) Probe alarm Digital
E2 Probe B2 alarm Automatic OFF OFF OFF OFF - ON - 36 (R) Probe alarm Digital
E3* Probe B3 alarm Automatic OFF OFF OFF OFF - ON - 36 (R) Probe alarm Digital
E4* Probe B4 alarm Automatic OFF OFF OFF OFF - ON - 36 (R) Probe alarm Digital
E5 Probe B5 alarm Automatic OFF OFF OFF OFF - ON - 36 (R) Probe alarm Digital
E6 Probe B6 alarm Automatic OFF OFF OFF OFF - ON - 36 (R) Probe alarm Digital
E7* Probe B7 alarm Automatic OFF OFF OFF OFF - ON - 36 (R) Probe alarm Digital
E8* Probe B8 alarm Automatic OFF OFF OFF OFF - ON - 36 (R) Probe alarm Digital
Hc1-4 Hour warning C1-4 Automatic - - - - - - ON 37 (R) Compressor advice Digital
EPr EEPROM error during Automatic - - - - - - ON 40 (R) General advice Digital
operation
EPb EEPROM error at the start-up Automatic OFF OFF OFF OFF OFF OFF OFF 35 (R) General alarm Digital
ESP Expansion Error Automatic OFF OFF OFF OFF OFF ON - 35 (R) General alarm Digital
EL1-2 Zero cross Automatic - - 100% - - ON* ON 42 (R) Fan advice Digital
dF1-2 Defrosting error Automatic - - - - - - ON 40 (R) General warning Digital
d1-2 Defrost on circuit in - - - - - - - - - Signal on display -
question
A1 Frost alarm circ. 1 Depends on P05 OFF C1-2 - OFF 1 - - ON - 31 (R) Circuit 1 alarm Digital
A2 Frost alarm circ. 2 Depends on P05 OFF C3-4 - OFF 2 - - ON - 32 (R) Circuit 2 alarm Digital
Ht High temperature Automatic - - - - - ON* ON 41 (R) Temperature advice Digital
Lt Low ambient temp. Depends on P05 - - - - - ON* ON 41 (R) Temperature advice Digital
AHt High temperature at the Automatic OFF - OFF OFF - - ON 40 (R) General warning Digital
start-up
ALt Low temperature at the Automatic OFF - OFF OFF - - ON 40 (R) General warning Digital
start-up
ELS Low supply voltage Automatic - - - - - - ON 40 (R) General warning Digital
EHS High supply voltage Automatic OFF OFF OFF OFF OFF OFF OFF 35 (R) General alarm Digital
Ed1 EVD 1 tLAN error Automatic OFF C1-2 - OFF - - ON - 33 (R) EVD 1 warning Digital
Ed2 EVD 2 tLAN error Automatic OFF C3-4 - OFF - - ON - 34 (R) EVD 2 warning Digital
SH1 EVD 1 superheat alarm - OFF C1-2 - OFF- - - ON - 33 (R) EVD 1 warning Digital
SH2 EVD 2 superheat alarm - OFF C3-4 - OFF- - - ON - 34 (R) EVD 2 warning Digital
nO1 MOP 1 warning Automatic - - - - - - ON 38 (R) EVD 1 advice Digital
nO2 MOP 2 warning Automatic - - - - - - ON 39 (R) EVD 2 advice Digital
LO1 LOP 1 warning Automatic - - - - - - ON 38 (R) EVD 1 advice Digital
LO2 LOP 1 warning Automatic - - - - - - ON 39 (R) EVD 2 advice Digital
HA1 High inlet temperature Automatic - - - - - - ON 38 (R) EVD 1 advice Digital
warning circ.1
HA2 High inlet temperature Automatic - - - - - - ON 39 (R) EVD 2 advice Digital
warning circ. 2
EP1 EVD 1 Eeprom error Automatic OFF C1-2 - OFF- - - ON - 33 (R) EVD 1 warning Digital
EP2 EVD 2 Eeprom error Automatic OFF C3-4 - OFF- - - ON - 34 (R) EVD 2 warning Digital
ES1 EVD 1 probe error Automatic OFF C1-2 - OFF- - - ON - 33 (R) EVD 1 warning Digital
ES2 EVD 2 probe error Automatic OFF C3-4 - OFF- - - ON - 34 (R) EVD 2 warning Digital
EU1 Open valve EVD 1 error at Automatic OFF C1-2 - OFF - - ON - 33 (R) EVD 1 warning Digital
the start-up
EU2 Open valve EVD 2 error at Automatic OFF C3-4 - OFF - - ON - 34 (R) EVD 2 warning Digital
the start-up
Eb1 EVD 1 battery alarm Automatic OFF C1-2 - OFF - - ON - 33 (R) EVD 1 warning Digital
Eb2 EVD 2 battery alarm Automatic OFF C3-4 - OFF - - ON - 34 (R) EVD 2 warning Digital
L Low load warning Automatic - - - - - - - - Signal on display -
Ed1 tLan EVD 1 communication Automatic OFF C1-2 - OFF - - ON - 33 (R) EVD 1 warning Digital
error
Ed2 tLan EVD 2 communication Automatic OFF C3-4 - OFF - - ON - 34 (R) EVD 2 warning Digital
error
PH1 Low pressure circ. 1 warning - - - - - - - - - Signal on display -
PH2 Low pressure circ. 2 warning - - - - - - - - - Signal on display
Table 6.a
Note: The warning relay differs from the alarm relay as it is only activated for warnings, that is, signals only, which
have no direct effect on the operation of the unit, and the display does not show the alarm symbol (bell).
Compressor
N.B. The alarm relating to the circuit with the fault must not interact with the operation of the other
circuit, as long as the condenser is not shared in common.
µC2 - +030220731 - rel. 1.4 - 26.10.2009 49
HP1: High pressure circuit 1
The alarm is detected irrespective of the status of the pump and the compressors. The compressors
corresponding to circuit 1 are immediately stopped (ignoring the set protection times), the buzzer and
alarm relay are activated, and the display starts flashing.
The fans corresponding to the condenser in circuit 1 are activated at maximum speed for 60 s, so as to
oppose the alarm situation, after which they are switched OFF. This alarm may also be generated when
the high pressure limit is exceeded (valid only when the pressure transducer is fitted) set by the parame-
ter P18, which to be enabled must be greater than 3.0 bars, due to the corresponding hysteresis.
P15= 0, P07= 0: the alarm is detected only if the compressors in circuit 1 are ON, and after the time P03
from when the compressors started, otherwise it is immediate.
P15= 1, P07= 0: the alarm is detected even if the compressors in circuit 1 are off, after the time P03.
P15= 0, P07= 1: the alarm is detected only if the compressors in circuit 1 are ON, and after the time P03
from when the compressors started, otherwise it is immediate, and if in heat pump mode, is activated for
pressure values less than 1 bar.
P15= 1, P07= 1: the alarm is detected also if the compressors in circuit 1 are Off, after the time P03, and if
in heat pump mode, is activated for pressure values lower then 1 bar. The hysteresis for this alarm is 1 bar.
ENGLISH
ESP: communication error with expansion card
If the controller loses communication with the expansion card, the entire system will be stopped to avoid
adversely affecting the unit. The alarm relay is activated and the display will show the message, with the
red LED on steady.
Driver
All the driver alarms on the µC2 that stop the unit feature automatic reset. Consequently, the possibility to
select the automatic resetting of the entire system must be selected for the drivers by setting the corre-
sponding parameters. The µC2 can send the Go Ahead command according to the normal procedure for
resetting the alarms from the keypad.
ENGLISH
Panel version
N
Line
EV driver ESP EV driver
Expansion
EV Driver L
EV Driver board
tLAN
ENGLISH
N02 No3 No4 C3/4 x No5
Tx/Rx GND
GND B4 V+
G0 B1 B2 B3 ID5 ID3 ID1 Key/SPV
outlet probe
inlet probe
remote ON/OFF
multi funct.
multi funct.
high press.
low press.
pressure
P probe
temperature
probe To program key
RS485
option
digital
imput
N L
Line To serial link
Fig. 7.a
tLAN
Bottom
GND T+ T- GND B4 V+
G0 B1 B2 B3 ID5 ID3 ID1
inlet probe
remote ON/OFF
multi funct.
multi funct.
high press.
low press.
pressure
P probe
temperature
probe
digital
To serial link input
N L
Line
Fig. 7.b
I/O layout
µC2 Description Expansion Description
B1 Control probe (Evaporator inlet/ambient) B5 Output probe in common with 2 evaporators (only with 2 circuits)
B2 Protection probe (evaporator outlet/outlet) B6 Circuit 2 protection probe (2nd evaporator output)
B3 Condenser/outside temperature probe B7 2nd condenser temperature probe
B4 (universal) Condenser pressure probe B8 (universal) 2nd condenser pressure probe
ID1* Flow switch – thermal overload circuit 1 – cooling/heating – end defrost circuit ID6** Flow switch – thermal overload circuit 2 – end defrost circuit 2 – step 4
1 – step 1 condensing unit – second set point condensing unit – second set point
ID2* Flow switch – thermal overload 1 circuit – cooling/heating – end defrost circuit ID7** Flow switch – thermal overload circuit 2 – end defrost circuit 2 – step 4
1 – step 2 condensing unit – second set point condensing unit– second set point
ID3 High pressure circuit 1 ID8 High pressure circuit 2
ID4 Low pressure circuit 1 ID9 Low pressure circuit 2
ID5 Remote ON/OFF – reverse cycle condensing unit if reversible ID10
Y1 Ramp circuit 1 (condenser) Y2 Ramp circuit 2 (condenser)
C1/2-NO1 Compressor 1 C6/7-NO6 Compressor 3 (1 in 2nd circuit)
C1/2-NO2 Heater or reversing valve in 1st circuit C6/7-NO7 Heater or reversing valve in 2nd circuit
C3/4-NO3 Fan 1/evaporator pump C8/9-NO8 Fan 2/condenser pump/backup
C3/4-NO4 Compressor 2 (capacity-control compressor 1) C8/9-NO9 Compressor 4 (capacity-control compressor 2) or reversing valve circuit 1
or reversing valve circuit 2
C5-NO5 Alarm or reversing valve C10-NO10 Warning or reversing valve circuit 2
Table 7.a
*= Any of the options for P08 can be selected (see Table 5.11)
**= Any of the options for P08 can be selected, except for E/I and E/I delay.
EV Driver N
EV driver Line
L
Top
Expansion board
Bottom
GND Tx/Rx GND B8 V+
G0 B5 B6 B7 ID10 ID8 ID6
outlet probe
cond. probe
inlet probe
remote ON/OFF
pressure
multi funct.
multi funct.
high press.
low press.
P probe
temperature
probe
digital
input
t-LAN
N L
Line
Fig. 7.c
NOTE: The expansion features two LEDs on the main board (to see these, remove the top or bottom
door), which display its status by the following messages:
ON Flashing
green LED Board powered Board powered and serial communication with µC2 in progress
red LED 1 flash: Probe fault alarm
2 flashes: Zero crossing alarm (mains frequency not detected)
3 flashes: Serial communication alarm with EVD
4 flashes: Serial communication alarm with µC2
Table 7.b
The alarms are displayed in sequence and are separated from each other by pauses.
EEV driver
FCSER00000
Fig. 7.d
54 µC2 - +030220731 - rel. 1.4 - 26.10.2009
7.4 Fan speed control board (code MCHRTF*)
The phase cutting boards (code MCHRTF****) are used to control the speed of the condenser fans.
1
IMPORTANT: The power supply to the µC2 (G and G0) and the MCHRTF**** board must be in 2 GND Y
phase. If, for example, the power supply to the µC2 system is three-phase, make sure that the
- +
primary of the transformer supplying the µC2 board is connected to the same phase that
is connected to terminals N and L on the speed control board; therefore, do not use
380 Vac/24 Vac transformers to supply the controller if the phase and neutral are used to directly
power the speed control boards.
Connect the earth terminal (where envisaged) to the earth in the electrical panel.
Key:
1. to µchiller;
2. earth;
3. to motor.
ENGLISH
LOAD LINE
3 220 Vac
Fig. 7.e
5 6 7 8
No Com Nc
Fig. 7.f
5 6 7 8
G0 0-10V G0 4-20mA
Fig. 7.g
TF*0*0).
it must be stressed that if the ON/OFF modules (code CONVONOFF0) or alternatively the PWM to 0 to
10 V converters (code CONV0/10A0) are used, parameter F03 should be set to zero, and parameter F04
to the maximum value.
Given the different types of motors existing on the market, the user must be able to set the voltages
supplied by the electronic board corresponding to the minimum and maximum speeds. In this regard
(and if the default values are not suitable), proceed as follows:
• set parameter F02= 0 (fans always ON) and set F03 and F04 to zero;
LOAD LINE
• increase F04 until the fan operates at a sufficient speed (make sure that, after having stopped it, it L N N L
continues to turn if left free);
• “copy” this value to parameter F03; this sets the voltage for the minimum speed;
• connect a voltmeter (set for AC, 250V) between the two “L” terminals (the two external contacts);
• increase F04 until the voltage stabilises at around 2 Vac (inductive motors) or 1.6, 1.7 Vac (capacitive
motors). Once the value has been found, it will be evident that even when increasing F04 the voltage
Vac?
no longer decreases. In any case do not increase F04 further so as to avoid damaging the motor;
• F02= 3.
Fig. 7.h
IMPORTANT NOTE: the key can be used only with controllers µC2 that have the same Firmware version.
Fig. 7.k.a
DOWNLOAD - copying the parameters from the key to the instrument:
• open the rear hatch of the key and place the dip-switch n. 1 in the OFF position and the dip-switch n. 2
in the ON position (see Fig. 7.k.b). Close the hatch;
• connect the key to the connector of the instrument;
• press the button on the key and keep it pressed, checking the LED signal sequence: at first it is red,
after a few seconds it becomes green;
• if the sequence of signals is as indicated above, the copying operation has been completed correctly
(green LED ON), the button can be released; after a few seconds the LED turns off and the key can be
disconnected from the instrument;
• in case of different signals: if the green LED doesn’t turn on or if there are some flashes there’s a
problem. Refer to the corresponding table for the meaning of the signals.
The operation takes maximum 10 seconds to complete. If after this period the completed operation signal
hasn’t yet appeared, i.e. the green LED ON, try releasing and pressing the button again. In the event of
Fig. 7.k.b flashes, refer to the corresponding table for the meaning of the signals.
LED signal error meaning and solution
red LED flashing Flat batteries at the be- The batteries are flat, the copying cannot be carried out.
ginning of the copying Replace the battery (only on PSOPZKEY00).
green LED Flat batteries at the end The copying operation has been carried out correctly but at the end
flashing of the copying (only on of the operation the voltage of the batteries is low.
PSOPZKEY00) It is advisable to replace the batteries.
Alternate Not compatible instru- The setup of the parameters cannot be copied since the model of
red/green LED ment the connected parameters is not compatible. Such error happens
flashing only with the DOWNLOAD function, check the controller code and
(orange signal) make the copy only on compatible codes.
red and green Copying error Error in the copied data. Repeat the operation; if the problem persi-
LEDs ON sts, check the batteries and the connections of the key.
red LED always Data transmission error The copying operation hasn’t been completed because of serious
ON data transmission or copying errors. Repeat the operation, if the
problem persists, check the batteries and the connections of the key.
LEDs OFF Batteries disconnected Check the batteries (for the PSOPZKEY00)
Power supply not Check the power supply (for the PSOPZKEYA0)
connected
Table 7.c
Technical specifications
Power supply to the - Use three 1.5 V 190 mA batteries (Duracell D357H or equivalent)
PSOPZKEY00 - Maximum current supplied 50 mA max.
Power supply to the - switching power supply:
PSOPZKEYA0 Input 100 to 240 V~; (-10%, +10%); 50/60 Hz; 90 mA. Output: 5 Vdc; 650 mA
Operating conditions 0T50°C r.H. <90% non-condensing
Storage conditions -20T70°C r.H. <90% non-condensing
Case Plastic, dimensions 42x105x18 mm including prod and connector Figs. 1 and 2
Table 7.d
(Here we have dealt only with the base functions of the instrument. For the remaining specific functions, see the
manual of the instrument that is being used).
ENGLISH
Fig. 7.l.a
RS485 serial option for µC2 DIN rail version (code FCSER00000)
The FCSER00000 serial option is used to connect the µC2 controller to a supervisor network via a standard
RS485 serial line. To access the connector and insert the serial board, open the cover, as shown in
Fig. 7.n.
FCSER*:
RS485 serial card
Fig. 7.l.b
MCH200T*00
1
3
1
5 2
MCH200TSV0
4
3
Fig. 7.m
Key:
1. rear view;
2. 15-way pin strip;
3. adapter for pin strip;
4. optional;
5. RS485 serial line from the supervisor;
6. to the MCH2 through “RJ12 power supply”.
Fig. 7.n.a
ENGLISH
Fig. 7.n.b
9
RJ12 – Power supply
RS485
3
24 Vac
G0
G0 G 4 2
5
6
N F
Fig. 7.o.a
3
–
+ GND
9 2
ENGLISH
RJ12 – Power supply
RS485
24 Vac
G0
5
G
G0 G
3
4
6
N F
Fig. 7.o.b
Installation
To install the remote terminal, no configuration is required on the µC2, as the terminal works with any
serial address set for parameter H10. Check, however, that the µC2 is fitted with the serial interface
FCSER00000 (DIN rail version) or MCH2004850 (panel version). When first switched on the display will
show the firmware version of the µC2 (Fig. 7.p.a).
Fig. 7.p.a
After around 4 s the main screen will be displayed, with the symbols that represent the status of the µC2
(Fig. 7.p.b).
Fig. 7.p.b
In the event where the RS485 connection is not performed correctly or the controller is off, the terminal
will clear the display and show the message “OFFLINE” (Fig. 7.p.c).
Disconnect the telephone connector, open the cover on the 15-way pin strip using a small pair of wire
cutters, and insert the adapter (pin-strip to 4-pin plug), in the direction shown in Fig 7.m (pin 1 on the left
from the side of the triangle). Connect the RS485 network to the converter and set the parameter H10
(serial address) of the µC2 to the desired value.
MCH200000* µC2 panel mounting version MCH200001* µC2 din-rail mounting version
33
ENGLISH
110
75 64
74
70 60
drilling template
71x29 mm
panel mounting
overall dimensions 91,5x36x5 mm
Fig. 8.a
44
88
Expansio
n board
Expansion board
11
60 36 60
70
82
82
18 156 31
30
134 83,5
125
Ø4
Ø4
34.5
Fig. 8.d
µC - +030220731 - rel. 1.4 - 26.10.2009
2
61
Condenser fan control modules
C The four holes for fastening the speed control board have a diameter of 4 mm, and the centre is positio-
A E ned 3.5 mm from the edges of the board.
- + The boards are supplied with 4 fasteners (H015 mm).
code A B C D E
MCHRTF20A0 43 100 50 107 32
MCHRTF40A0 43 100 50 107 46
MCHRTF60A0 75 100 82 107 46
MCHRTF80A0 75 100 82 107 64
D E
LOAD LINE
L N N L
ENGLISH
Fig. 8.e
24
5 75 5
31 3 56 85
59
Fig. 8.f
ENGLISH
Fan card, screw terminals MCHRTF*0B0
* depending on amperage (2= 2A, 4= 4A, 6= 6A, 8=8A)
Temperature probes for regulation or condensation control NTC***WP00
***depending on the length (015= 1.5 m, 030= 3 m, 060=6 m)
Pressure probes for condensing pressure control SPK*R*
** depending on the pressure (13= 150 PSI, 23= 75 PSI, 33= 500 PSI)
Connectors kit for code MCH2000001 (multiple package 20 pcs) MCH2CON001
Connectors kit for code MCH2000001 (multiple package 10 pcs) MCH2CON011
Connectors kit for code MCH2000001 (multiple package 10 pcs) MCH2CON021
Minifit connectors kit + 1-meter length for code MCH20000** MCHSMLCAB0
Minifit connectors kit + 2-meter length for code MCH20000** MCHSMLCAB2
Minifit connectors kit + 3-meter length for code MCH20000** MCHSMLCAB3
Remote terminal for MCH20000** for panel installation MCH200TP0* MCH200TP0*
Remote terminal for MCH20000** for wall-mounting MCH200TW0* MCH200TW0*
Supervisor serial connection kit for remote terminal MCH200TSV0
Table 9.a
100 UL: Resistive: 3A, 1 FLA, 6 LRA cosj =0.4 30,000 cycles
numero di operazioni (x 104)
Functional characteristics
Resolution of the analogue inputs Temperature probes: range -40T80 °C, 0.1 °C
Temperature measurement error Range -20T20 °C, ±0.5 °C (excluding probe)
Range -40T80 °C, ±1.5 °C (excluding probe)
Pressure measurement error The % error with a voltage reading with a range of input from 0.5 to 4.5
is ± 2% (excluding probe).
The error in the converted value may vary according to the settings of
parameters /9, /10, /11, /12
Table 10.b
Code of the contacts according to the cross-section of the connection cables to the 12- and 14-pin con-
nectors (use the special Molex® tool code 69008-0724 for crimping
Molex® code of the contact Cross-section of cables allowed
39-00-0077 AWG16 (1,308 mm2)
39-00-0038 AWG18-24 (0,823...0,205 mm2)
39-00-0046 AWG22-28 (0,324...0,081 mm2)
Table 10.d
In addition, the pre-wired kits MCHSMLC*** are also available
ENGLISH
Protection against electric shock and warnings for maintenance
The system made up of a control board (MCH200000*) and the other optional cards (MCH200002*,
MCH200485*, MCHRTF****, CONVONOFF*, CONV0/10A*, EVD000040*) represents a control device to
be integrated in class I or class II equipment.
The class of protection against electric shock depends on the method with which the control device is
integrated into the unit made by the manufacturer.
Disconnect the power supply before working on the board for assembly, maintenance and replacement.
The protection against short-circuits, due to defective wiring, must be guaranteed by the manufacturer of
the equipment that the control device is integrated into.
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CAREL reserves the right to modify the features of its products without prior notice.
Agenzia / Agency:
+030220731 rel. 1.4 - 26.10.2009