Skip to main content
Error code reference
LG Air Conditioner Error Code CH22
CT 2 (Max CT) - PCB section current is excessively high.
SourceLG Air Conditioner - Tech Sheet: LP-Y Series Specifications
Diagnostic procedure
The full CH22 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 fan constraint (indoor/outdoor); remove blockings around heat exchanger and filter; check if input voltage is within AC 190-260V (115V model: 95-130V).
SourceLG Wall Mounted Air Conditioner - Service Manual: General Inverter Typep. 28, 58-59
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock CH22 procedure $9.95
Or subscribe: $29/month for all codes plus Max diagnostics, with 70 Max messages a day. Plus applicable tax.
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
Get Started$29/month · Cancel anytime · Or $9.95 3-day pass · Plus applicable tax