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8.4 Outdoor unit PCBs
8.4.1 MAIN PCB
1) Label descriptions are given in Table 8-7
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
Table 8-4
NO.
1
CN30：Input of three-phase four-wire power supply (fault code E1) Input of transformer, 220-240V AC
current. (only valid for the main unit) Three phases A, B and C of power supply should exist 120° among
them. If the conditions are not met, fault of phase sequence or phase lack may occur, and fault code will
be displayed. When the power supply returns to normal condition, fault is removed. Attention: phase lace
and phase dislocation of power supply are detected only in the early period after the power supply is
connected, and they are not detected while the unit is in operation.
2
CN12:Quick return oil solenoid valve
3
CN5:EVA-HEAT,Water side heat exchanger heaters connection
4
CN13:EVA-HEAT,Electric of water side heat exchanger heaters connection
5
CN42:CCH,Crankcase heater
6
CN43:CCH,Crankcase heater
7
CN6:ST1,Four-way valve
8
CN4/CN11:W-HEAT,Electric heater of water flow switch
9
CN86:SV2,Spray cooling valve
10
CN83:Pump
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.
44
27
25
24
22
21
28
26
23
Fig. 8-7 Main PCB of SCV-300EB and SCV-600EB
Detail information
1
15
18
16
20
19
17
14
14
2
3
4
5
7
6
8
9
10
11
12
13
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