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CH05: Outdoor Unit PCB Error (LG)

LG heat pump outdoor unit control PCB has detected a fault and cannot operate.

What This Error Code Means

The main control board on the outdoor unit has an internal fault requiring replacement.

Common Causes

  • Power surge damage
  • Component failure on outdoor PCB
  • Moisture ingress in outdoor electrical compartment
  • Overheating of board
  • Manufacturing defect

Affected Brands

LG

How ROMA Heating Fixes This

  • Inspect outdoor PCB for visible damage
  • Check all power inputs to outdoor unit
  • Verify communication with indoor unit
  • Replace outdoor PCB
  • Test system operation after PCB replacement

Why Trust ROMA Heating

24/7 Emergency

True round-the-clock service including weekends and holidays

Licensed Technicians

TSBC licensed and trained on all major heat pump brands

Fast Diagnosis

We know exactly how to interpret and resolve error codes

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