8.3 Outdoor unit PCBs
8.3.1 MAIN PCB
NO.
1
2
3
4
5
6
7
8
9
10
11
Detail information
CN32
：
Main board power supply.
Table 8-2
CN99:slave board power supply
.
CN75/CN66:EVA-HEAT,Electric of water side heat exchanger heaters connection
CN74/CN67:CCH,Crankcase heater
CN48:ST1,Four-way valve
CN47:SV6,Liquid bypass solenoid valve
CN49:SV5,Multi-function solenoid valve
CN84:SV8A,Injection solenoid valve of compressor system A
CN83:SV8B,Injection solenoid valve of compressor system B
CN93
：
The alarm signal output of the unit(ON/OFF signal)
Attention: the control port value of the alarm actually detected is ON/OFF but not 220-240V control power supply
，
so
special attention should be paid when installing the alarm signal output.
CN68:Pump(220-240V control power supply )
1
）
After receiving start-up instruction, the pump will be started up instantly, and will maintain start-up state always
in the process of operation.
2
）
In case of refrigerating or heating shutdown, the pump will be shut down 2 minutes after all modules stop
operating.
3
）
In case of shutdown under the pump mode, the pump can be directly shut down.
1) Label descriptions are given in Table 8-2
16
1
2
3
4
5
6
8
7
9
10
11
13 12
Fig. 8-9 Main board of
KEM-75 DRS5 KH
and
KEM-140 DRS5 KH
14
15
19
22
24
26
28
29
31
33 34
38 39
36
35
25
27
30
32
18
20
21
23
17
37
15
