Error code reference

LG Air Conditioner Error Code E505

Error due to self diagnosis of high pressure sensor.

SourceLG System Air Conditioner Outdoor Unit - Full Service Manual (AM100/120/140/160 Series)p. 4-11, 9-12

Diagnostic procedure

The full E505 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 pressure sensor breakdown; check service valve state.

SourceLG System Air Conditioner - Full Service Manual: Outdoor Unit (AM080-AM220 Series)p. 4-19, 9-13

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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 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 E505 procedure

Where this code is documented

Models covered by the manuals that document this code

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