Error code reference

LG Air Conditioner Error Code CH02

Indoor inlet pipe sensor error (connector connection error, faulty PCB, or faulty sensor open/short).

SourceLG Ceiling Duct Air Conditioner - Service Manual (LBUH602RSA2)p. 57-58

Diagnostic procedure

The full CH02 procedure

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MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Unplug the sensor on indoor unit PCB and check connector connection; measure resistance (should be 5KΩ at 25°C unplugged) or voltage (should be 2.2Vdc at 25°C plugged).

SourceLG Ceiling Duct Air Conditioner - Service Manual (LBUH602RSA2)p. 57-58

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More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

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Where this code is documented

30 manuals in the MyPros+ library document this code for LG air conditioner.

Models covered by the manuals that document this code

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The full CH02 procedure

Where this code is documented

Models covered by the manuals that document this code

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