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Error code reference
LG Air Conditioner Error Code C5
Communication error (serial communication) between indoor and outdoor units.
SourceLG AS-W1863/W2463 Series - Service Manual: Exploded View & Assemblyp. 66
Diagnostic procedure
The full C5 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
Check the state of connecting cable (3 line) between indoor and outdoor unit. Check Fuse, Noise Filter, PTC. Check electrical wiring diagram colors and connector states.
SourceLG AS-W1863/W2463 Series - Service Manual: Exploded View & Assemblyp. 66
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
75,000+ service documents · 20,000+ error codes · 100+ brands
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