LG AS-W0964DH0 Service Manual page 58

Troubleshooting Guide
Troubleshooting for error code
Error code Description
Indoor TH. is short or
1
Check flow
Indoor TH. is connected to
Indoor pcb assembly ?
No
- Connect to CN-TH1 in
indoor pcb assembly
Error code Description
Outdoor TH. is short or
2
Check flow
Outdoor TH. is connected to
outdoor pcb assembly ?
No
- Connect to CN-TH1 in
outdoor pcb assembly
58 Room Air Conditioner
• Indoor TH. (sensor) is short or open
• Indoor TH. (sensor) is not connected to the indoor pcb assembly
• Damage or defect on the sensing circuit of indoor pcb assembly.
open
(R01H, R02H, R03H, R04H, C01H, C02H)
YES
Indoor TH. is right ?
No
Check Indoor TH.
- Measure resistance of TH.
(air : about 10k
pipe : about 5k
• Outdoor TH. (sensor) is short or open
• Outdoor TH. (sensor) is not connected to the outdoor pcb assembly
• Damage or defect on the sensing circuit of outdoor pcb assembly.
open
(R03H~R06H, C02H, C03H)
YES
Outdoor TH. is right ?
No
Check outdoor TH.
- Measure resistance of TH.
(air : about 10k
pipe : about 5k
Cause of error
YES
Sensing circuit of indoor
pcb is right ?
- Check soldering state of
at 25 C, R01H ~ R04H, C01H, C02H
at 25 C)
Cause of error
YES
Sensing circuit of outdoor
pcb is right ?
- Check soldering state of
at 25 C, R03H ~ R06H, C02H, C03H
at 25 C)
No
No