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Troubleshooting for error code
Error code
Description
Indoor TH. is short or
1
open
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
open
Check flow
Outdoor TH. is connected to
outdoor pcb assembly ?
No
- Connect to CN-TH1 in
outdoor pcb assembly
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Only for training and service purposes
• 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)
YES
Indoor TH. is right ?
No
Check Indoor TH.
- Measure resistance of TH.
(air : about 10k Ω at 25 °C,
pipe : about 5k Ω at 25 °C)
• 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)
YES
Outdoor TH. is right ?
No
Check outdoor TH.
- Measure resistance of TH.
(air : about 10k Ω at 25 °C,
pipe : about 5k Ω at 25 °C)
- 57 -
Troubleshooting Guide
Cause of error
YES
Sensing circuit of indoor
pcb is right ?
No
- Check soldering state of
R01H ~ R04H, C01H, C02H
Cause of error
YES
Sensing circuit of outdoor
pcb is right ?
No
- Check soldering state of
R03H ~ R06H, C02H, C03H
LGE Internal Use Only
- Quick Links:
- Self Diagnosis Function
- Schematic Diagram
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Troubleshooting
