Skip to main content
Error code reference
LG Air Conditioner Error Code CH23
DC Link Low Voltage - PCB detects voltage below 140V, compressor turns OFF; error reported after 5 occurrences.
SourceLG Air Conditioner - Tech Sheet: LP-Y Series Specifications
Diagnostic procedure
The full CH23 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 if terminal block power cable is properly installed; check power cable connection/resistance; check if input voltage is within AC 190-260V (115V model: 95-130V).
SourceLG Wall Mounted Air Conditioner - Service Manual: General Inverter Typep. 28, 60
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock CH23 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