HIGHError Code
CH05: Outdoor Unit PCB Error (Heat Pump - LG)
LG heat pump outdoor unit control PCB has detected a fault.
What This Error Code Means
Main control board on outdoor unit has internal fault.
Common Causes
Power surge
Component failure
Moisture ingress
Overheating
Manufacturing defect
Affected Brands
LG
How ROMA Heating Fixes This Error Code
Inspect PCB for visible damage
Check power inputs
Verify communication
Replace outdoor PCB
Test system operation
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