LG CH 22 error code

What it means

CH 22 means the outdoor unit detected an overcurrent condition at the inverter compressor input. That is an electrical/compressor-protection fault, not something to troubleshoot inside the cabinet.

Urgency

Likely causes

1. Outdoor unit overcurrent
2. Temporary operation error
3. Outdoor electrical or compressor-drive condition needing service

Homeowner fix

Turn the system off and power cycle once at the breaker if you can do that safely. If CH 22 returns or the breaker trips, stop using the system.

When to call a pro

Call a licensed HVAC technician if CH 22 returns. Tell them LG identifies CH 22 as outdoor inverter compressor input overcurrent.

Repair vs replace

Overcurrent faults may be wiring, board, or compressor-drive issues. Compare major inverter or compressor repair quotes with replacement on older equipment.

• LG Mega R-32 9,000 BTU (115V)

  Mega R-32

• LG Mega R-32 9,000 BTU (230V)

  Mega R-32

• LG Mega R-32 12,000 BTU (115V)

  Mega R-32

• LG Mega R-32 12,000 BTU (230V)

  Mega R-32

For your technician

Technician note: check outdoor supply, inverter input current, compressor current, drive board, and overload causes. Page context: LG maps this display to the Mega R-32 line; source: LG official support pages: [LG Air Conditioner] Guide to Error Codes; [LG Air Conditioner] How to Check Air Conditioner Error Codes; LG status-display help articles; LG Korea [LG Air Conditioner] Air conditioner error inquiry cross-check; display convention: match the letter C, letter H, and twenty two marker exactly before comparing neighboring codes.

Which systems show it

Mega R-32

Related troubleshooting

Use the symptom guide alongside the exact display code if the unit is flashing, cycling, or showing comfort symptoms.

Related codes

Source

Next step