Troubleshooting Guide
Air Conditioner Service Manual
11
Outdoor unit
9K, 12K
18K
1
ODU PCB Mainly relay
2
Fuse
3
L, N & 1
4
4-way valve
5
Heater
6
DC fan motor connector
7
Electronic expansion valve
8
Discharge sensor connector/
OAT/OPT connector
9
LED5
1
LED5
2
Discharge sensor connector/
OAT/OPT connector
3
Electronic expansion valve
4
AC/DC fan motor connector
5
4-way valve
6
Heater
7
Communication wiring
8
L line
9
Fuse
10
N line
11
ODU PCB Mainly relay
12
LED1-LED4
1
2
3
4
5
6
7
8
9
8
7
6
4
5
3
2
1
9