Section 9 - Fault Finding
117
Installation and Maintenance
FAULT FINDING
Port for high pressure switch(Reserved)
Port for low pressure switch(Reserved)
Port for Tp temp.sensor
Control port for room thermostat (heating mode)
Power port for room thermostat
Control port for room thermostat (cooling mode)
HT
COM
CL
0~10V
Output port for 0-10V
Assembly unit
Order
1
2
3
4
5
8
6
Port
Code
7
CN60
CN41
CN40
CN62
CN65
HEAT2
HEAT1
OUT1
HEAT3
SV2
9
11
10
12
14
13
15
CN71 ST1
CN68
Reserved
OUT1
Port for 4-way valve
Port for the heating tape of drainage outlet
CN56
CN28
/
DSP1
CN21
/
/
Port for the heating tape of drainage outlet
Reserved
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
230VAC
0-12VDC
0-12VDC
0-12VDC
0-12VDC
0-12VDC
0-12VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-5VDC
0-3.3VDC
0-3.3VDC
0-3.3VDC
0-3.3VDC
0-3.3VDC
Reserved
Reserved
Reserved
Port for crankcase heating tape
Port for variable speed pump power input
PUMP
Dip switch
/
/
Digital display
Port for power supply
POWER
CN48
AC METER
Reserved
Port for IC programming
CN67
DEBUG1
CN44
T4
16 CN33
T3
17 CN49
L-SEN
CT1
18
CN43 COMM
on/off
19
20 CN3
CN46
H-SEN
21
CN5Th
22
CN50
Tp
23
CN54
L-PRO
25
CN53 H-PRO
24 CN45
26
CN34
27
CN35
CN16
RS485
Reserved
T9O/T9I
Port for T4 temp.sensor
Port for T3 temp.sensor
Port for low pressure sensor
Port for high pressure sensor
Port for communication with Inverter module
Port for current transformer(Reserved)
Port for high pressure switch
Port for variable speed pump communication
T2
28
CN47
CN10
T2B
29
30
CN17
PUMP_BP
31
CN31
33
CN66
K1,K2
Port for high pressure switch
S1,S2
32
34
35
36
Port for refrigerant liquid side temperature
(heating mode)
Port for temperature sensors of refrigerant
gas side temperature (cooling mode)
Port for Th temp.sensor
CN7TL
Port for TL temp.sensor
Assembly unit
Order
Port
Code
CN8
CN39
Port for temperature sensors of outlet water
temperature of plate heat exchanger
Port for temperature sensors of inlet water
temperature of plate heat exchanger
Port for temperature sensors of final outlet
water temperature
FS
TW_in
TW_out
T1
Port for flow switch
EEV2
Port for electrical expansion valve2
CN63
CN61
Port for additional heat source
CN30
1,2
Port for smart grid (photovoltaic signal)
Port for smart grid (grid signal)
SG
EVU
M1 M2
Port for remote switch
CN9/
Control port for internal backup heater
3,4
Port for communication with the wired controller
Port for thermostat transfer board
6,7
9,10
Port for machine Cascade
CN55 Light
Port for breathing light
Control port for tank booster heater
Control port for internal backup heater 1IBH1
IBH2
TBH
CN22
CN42
CN32
CN29
CN25
Control port for internal backup heater 2
Port for anti-freeze electric heating tape(internal)
Port for transformer power input
Port for anti-freeze electric heating tape(internal)
HEAT6
AC OUT
HEAT5
Control port for internal backup heater 1
13 16
14 16
15 17
Control port for internal backup heater 2
24 23
Reserved
38
39
40
41
42
43
Port for USB programming
CN4 USB
Port for IC programming
CN24
44
CN13
45
CN23
CN27
46
47
48
49
CN37
50
CN38
51
CN15
52
53
54
55
56
57
58 CN18
DEBUG2
Port for temperature sensor of balance tank
Port for domestic hot water tank temp. sensor
Tbt
T5/T1B
CN26
Reserved
TX
RH
Port for humidity sensor
Port for temperature sensor of balance tank 2
Port for outlet water for zone 2 temp. sensor
Port for solar panel temp sensor
Tw2
Tsolar
59 CN36
Port for thermostat transfer board
/
PW
Port for temperature sensor of water pressure
CN20
FM
Reserved
T52
37
Port for SV2(3-way valve)
Port for zone 2 pump
Port for outside circulation pump
Port for solar energy pump
Port for DHW pipe pump
Port for SV3(3-way valve)
1 2
3 4 17
5 6 18
7 8 19
9 20
10 21
CN11
Port for additional heat source
Port for SV1(3-way valve)
11 22
12 23
Control port for tank booster heater
EEV3
Port for electrical expansion valve3(Reserved)
EEV1
Port for electrical expansion valve1(Reserved)
Table 24 Main Circuit Board (Outdoor)
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