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.

Have a question? Ask the community

Thousands of refrigeration mechanics read and answer for free. Post your case in under 1 minute.

Need a professional diagnosis?

Low Temp Service — refrigeration experts in Florida.

Contact us