LG CH 30 error code

What it means

CH 30 is a high discharge-temperature protection code. LG's support table lists refrigerant shortage, blocked refrigerant flow, or a refrigerant-flow control valve fault as causes.

Urgency

Likely causes

1. Low refrigerant
2. Refrigerant flow obstructed
3. Refrigerant flow control valve failure
4. Temporary operation error

Homeowner fix

Turn the system off and do not keep resetting it if CH 30 returns. Do not add refrigerant, open panels, or try to service valves.

When to call a pro

Call a licensed HVAC technician if CH 30 appears. Tell them LG identifies CH 30 as compressor discharge-temperature excessive rise with refrigerant-flow causes.

Repair vs replace

A minor leak or valve issue may be repairable. If the repair involves a coil, line set, compressor, or repeated refrigerant loss on older equipment, compare repair with replacement.

• 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: follow R32 refrigerant safety practices; check discharge temperature, charge, restrictions, flow-control valve operation, and compressor health. 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 thirty 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

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