Haier U Series Service Manual page 13

PCB1: control PCB
1 CN2 connector for electronic inflated valve
2 CN4/CN8connector for CN1/CN2 in PCB2 for supply 310V
3 CN19/CN21/CN22/CN20 connector for suction/defrost/ambient/compressor sensor
4 CN3 connector for CN10 in PCB3
5 CN14 connector for 4-way valve
6 CN18/25/26 connector for fan motor
7 CN9 connector for N(IN) in PCB3
8 CN6 is L wiring
9 CN7 is N wiring
10 CN10 is GROND wiring
11 CN10` is linking cable between the indoor and outdoor
PCB2:
12 CN1 connector for CN4 in PCB1
13 CN2 connector for CN8 in PCB1
14 CN3 connector for P+ in PCB3
15 CN4 connector for N- in PCB3
PCB3:
16 U/V/W connector for black/white/red wire of compressor
17 connector for CN11 in PCB1
18 CN5 connector for CN16 in PCB1
19 P/N is how to connect referring to PCB2
20 LX1/LX2 connector for inductance
21 P OUT+ and N OUT- are how to connect referring to PCB2
22
L IN and N IN are how to connect referring to PCB1
HSU-09,12H03/U(DBPZXF)
PCB1
CN1 SW1
PCB2
10
Connector wiring Diagram
Domestic Air Conditioner