Error code reference

LG Air Conditioner Error Code E212

MCU rotary switch for address setting has 3 or more of the same address.

SourceLG System Air Conditioner - Full Service Manual: Outdoor Unit (AM080-AM220 Series)p. 4-17, 4-32

Diagnostic procedure

The full E212 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

Find MCU with repeated address, reassemble, then press K3 to reset.

SourceLG System Air Conditioner - Full Service Manual: Outdoor Unit (AM080-AM220 Series)p. 4-17, 4-32

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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 air conditioner.

Models covered by the manuals that document this code

More models are covered than are listed here.

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The full E212 procedure

Where this code is documented

Models covered by the manuals that document this code

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