Error code reference

LG Air Conditioner Error Code 11

Outdoor unit cannot recognize the indoor unit; addressing signal does not come out for 3 minutes while indoor unit receives calling signal from outdoor unit.

SourceLG Air Conditioner - Full Service Manual: ARUN/ARUV/ARNU Series (R410A)p. 253

Diagnostic procedure

The full 11 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
1
First diagnostic step
Reset outdoor unit main PCB; if error persists, re-operate auto-addressing.

SourceLG Air Conditioner - Full Service Manual: ARUN/ARUV/ARNU Series (R410A)p. 253

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

More models are covered than are listed here.

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