518
Thermo King
Critical
Generator Ground Fault
Current leakage to ground detected in the generator circuit.
Possible causes
- Deteriorated generator winding insulation
- High voltage cables rubbing against chassis
- Excessive moisture in generator junction box
- Electrical component (fan motor) with short to ground
Recommended actions
- Perform insulation test (Megger) on generator
- Visually inspect power cables for chafing
- Dry and clean the alternator terminal box
- Disconnect loads one by one to isolate failed component
Can't find your code? Talk to an expert
$150
One-on-one phone session with a Low Temp refrigeration tech. Emergency temporary assistance only.
Other Thermo King codes
Need a professional diagnosis?
Low Temp Service — refrigeration experts in Florida.