LG General Wall Mounted-Inverter Type - Manual (Page 49)

Service Manual 49
■ Troubleshooting Guide(9,12kBtu/h Model)
Part 4 Trouble Shooting
Description Cause of error
1
• 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.
(R01H, R02H, R03H, R04H, C01H, C02H)
Indoor TH. is short or
open
Indoor TH. is connected to
Indoor pcb assembly ?
Indoor TH. is right ?
YES
No
- Connect to CN-TH1 in
indoor pcb assembly
Sensing circuit of indoor
pcb is right ?
No
Check Indoor TH.
- Measure resistance of TH.
(air : about 10k
Ω at 25°C(77°F),
pipe : about 5k
Ω at 25°C(77°F)
YES
No
- Check soldering state of
R01H ~ R04H, C01H, C02H
Check flow
2
• 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.
(R03H~R06H, C02H, C03H)
Outdoor TH. is short or
open
Description Error code
Error code
Cause of error
Outdoor TH. is connected to
outdoor pcb assembly ?
Outdoor TH. is right ?
YES
No
- Connect to CN-TH1 in
outdoor pcb assembly
Sensing circuit of outdoor
pcb is right ?
No
Check outdoor TH.
- Measure resistance of TH.
YES
No
- Check soldering state of
R03H ~ R06H, C02H, C03H
Check flow
(air : about 10k
Ω at 25°C(77°F),
pipe : about 5k
Ω at 25°C(77°F)