LG Therma V fault CH29

What it means

Result code output by the manual fault diagnostic function indicating the PCB assembly (inverter PCB) tested OK during the diagnostic sequence.

Likely causes

1. Overload operation (Plugging blocked / shielded / EEV failure / excessive refrigerant)
2. Compressor burnout (insulation breakdown / motor burnout)
3. Input voltage low voltage
4. Inv PCB (Outdoor) burnout
5. Fan locked
6. Obstruction/shield around the heat exchanger
7. Insufficient distance between product and wall
8. Piping condition issues such as pipe bending
9. EEV operation/connection status fault
10. Abnormal refrigerant pressure
11. Compressor restraint
12. Compressor wiring reverse phase loss
13. Short circuit or opening of internal connection line in compressor
14. Compressor winding resistance out of spec
15. Compressor insulation resistance failure
16. Inverter PCB assembly or connector connection fault
17. IGBTM failure

Where to start

1. Enter functions using LGMV (PC or Mobile)
2. Perform a diagnostic function via LGMV
3. Check if the product installation is in good condition: check if the fan is locked, check the shield around the heat exchanger, check the distance between the product and the wall, check the condition of piping such as bending of the pipe, check EEV operation status and connection status, check refrigerant pressure. If No: remove the cause of the abnormality.