CH32
LG
Outdoor Unit Capacity or Model Mismatch / EEPROM Error
System displays CH32 and may not start or may shut down during operation.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Incorrect outdoor PCB installed for the model, Corrupted EEPROM data on outdoor PCB, Incorrect dip switch or jumper settings on PCB
How to Fix / Troubleshooting
Safety: Turn off power before accessing the outdoor PCB.
Steps:
- Verify model and PCB: Check that the replacement PCB (if recently changed) matches the exact LG model number of the outdoor unit.
- Check dip switches/jumpers: Compare the PCB switch settings to the service manual for your model. Correct any mismatches.
- Power reset: After adjustments, power off for 5–10 minutes, then on, and test.
Technician recommended: If CH32 persists, the EEPROM or PCB firmware may be corrupted and the board should be reprogrammed or replaced by an LG-authorized technician.
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Repair Difficulty
Hard
4/5
Required Part
Outdoor Control PCB
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