Error code reference

LG Heat Pump Error Code 52

Transmission error from inverter PCB to main PCB in outdoor unit: no signal received for 20 seconds (CRUN1008T1 only).

SourceLG System Heat Pump Air Conditioner - Service Manual: CRUN/CRNN Seriesp. 245

Diagnostic procedure

The full 52 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Check transmission line connections and connectors between inverter PCB and main PCB.

SourceLG System Heat Pump Air Conditioner - Service Manual: CRUN/CRNN Seriesp. 245

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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

2 manuals in the MyPros+ library document this code for LG heat pump.

Models covered by the manuals that document this code

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The full 52 procedure

Where this code is documented

Models covered by the manuals that document this code

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