Wiring Diagram - Haier MRV 5-RC VP1-112B Service Manual

6. Wiring diagram

Description of the Main-board Port definition
No. Port Port description
1 L/N/G AC Power Input
2 SV3 Liquid Jetting to compressor 1
3 SV10 Drain the oil from compressor 2
4 SV9 Drain the oil from compressor 1
5 SV1 Balance pressure(Load-OFF)
6 4WV Hot and cold switching
7 HEAT1 Heating band of compressor 1
8 HEAT2 Heating band of compressor 2
9 HPS2 High pressure switch of compressor 2
10 HPS1 High pressure switch of compressor 1
11 Ps Low pressure sensor
12 Pd High pressure sensor
13 Td1 Exhaust temperature of compressor1
14 Td2 Exhaust temperature of compressor2
15 Tdef1 Detect the defrosting temp
16 Tao Ambient temperature
17 Toil2 Detect the oil temp. of compressor 2
18 Toil1 Detect the oil temp. of compressor 1
19 Toci1/Ts Detect SH temp. in heating
20 LEVA1 SH control in heating
21 LEVA2 SH control in heating
22 DC12V Output DC12V
23 BT Output DC5V/Communication
24 P/Q Indoor/outdoor unit com. port
25 A/B/C Outdoor unit com. port
26 Bus-B/A Centralized control port
27 Stop Emergency stop port
28 ZIGBEE Wireless module com. port
29 INV-COM INV module com. port
30 Low Power Low standby power consumption
Outdoor and indoor searching
31 BM1
Outdoor address setting
32 BM2 Wireless communication
33 BM3 HP setting of outdoor units
34 BM4 Set the control address
35 SW4/5/6/7 Special function control keys
36 DC12V Input DC12V
37 L/N AC Power Input
38 SV32 Liquid jetting to compressor 2
39 4WV2 Hot and cold switching
40 4WV3 Hot and cold switching
41 Toci2 Detect SH temp. in heating
42 Tdef2 Detect the defrosting temp
43 Tx Rx Input DC5V/communication
44 Tliqsc/Tsco Detect SH temp. of subcooler
45 LEVB Contral subcooler
Note:
B:Black G:Green W:White BL:Blue R:Red Y:Yellow
The component in the dotted box is used for 16 to 22HP
1 2 3
1 2 3 4 1 2 3 4 1 2 3 1 1
IO Board
57
1 2
1 2
1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 4 1 2 3 4 1 2 3 1 2 3 1 2 3