Wiring diagrams 
11 Domestic air conditioner 
6.Printed Circuit Board Connector Wiring Diagram
Connectors 
PCB (1) (Outdoor Control PCB) 
1 CN1 
Connector for power N and
●
 L 
2 CN2 
3  CN3  Connector for ground 
4 CN2’ 
Connector for the U, V, W wire of the 
compressor 5 CN3’ 
6 CN4’ 
7 LI (CN7) 
Connector for reactor 
8 LO (CN6) 
9  CN21  Connector for fan motor 
10  CN10  Connector for four way valve coil 
11 CN20 
Connector for Temperature sensor 
12 CN18 
13  CN5  Connector for Terminal Socket-protection 
14  CN4  Connector for communicate between indoor and outdoor unit 
15  CN16  Connector for electric expansion valves 
Note: Othe
r Designations
●
 
1) FUSE 1, (2
0A, 250VAC); FUSE 2(3.15A, 250V
AC)
2) LED 1 Kee
p light representative normal, if keep flash interval representative trouble Alarm
3) R
V1, RV2, RV3, RV4 Varistor