Error code reference

LG Heat Pump Error Code CH28

DC Link voltage is high.

SourceLG AH Series Heat Pump - Service Manualp. 61, 70

Diagnostic procedure

The full CH28 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 power source; check wire connections and components; verify DC link voltage per table.

SourceLG AH Series Heat Pump - Service Manualp. 61, 70

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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

1 manual in the MyPros+ library documents this code for LG heat pump.

Models covered by the manuals that document this code

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The full CH28 procedure

Where this code is documented

Models covered by the manuals that document this code

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