LG Therma V fault CH41

What it means

Open / short of outdoor unit D-pipe sensor (Inverter)

Likely causes

1. Check the sensor stewed condition
2. Check for sensor burnout
3. Fan locked
4. Obstruction/shield around the heat exchanger
5. Insufficient distance between product and wall
6. Piping condition issues such as pipe bending
7. EEV operation/connection status fault
8. Abnormal refrigerant pressure
9. Compressor restraint
10. Compressor wiring reverse phase loss
11. Short circuit or opening of internal connection line in compressor
12. Compressor winding resistance out of spec
13. Compressor insulation resistance failure
14. Inverter PCB assembly or connector connection fault
15. IGBTM failure

Where to start

1. Is the sensor properly inserted in the PCB? If No, insert it properly into the PCB (reassemble the sensor).
2. Is the sensor normal? If No, replace sensor.
3. Is the sensor assembly in good condition? If No, replace sensor.