Error code reference

LG Air Conditioner Error Code 149

Short voltage/excess voltage of Sub2 outdoor unit - input voltage more than 487V or less than 270V (3 units).

SourceLG Air Conditioner - Service Manual: LRNV/LRNN/LRUN/LRUV Seriesp. 261

Diagnostic procedure

The full 149 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 if input power is normal.

SourceLG Air Conditioner - Service Manual: LRNV/LRNN/LRUN/LRUV Seriesp. 261

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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 149 procedure

Where this code is documented

Models covered by the manuals that document this code

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