Controller displays “Ground Fault” or “Earth Fault” and trips the generator output.

Safety first: Open the generator output breaker and lock out the transfer switch. Use appropriate PPE when working on live circuits.

Steps:

• Visual inspection: Inspect generator output cables, conduits, and junction boxes for signs of damage, water, or rodent activity.
• Insulation testing: With power off, use a megohmmeter to test insulation resistance between each phase and ground. Low readings indicate a faulted conductor or load.
• Isolate loads: Disconnect branch circuits or major loads one at a time to identify which circuit causes the ground fault indication.
• Correct bonding: Verify that neutral-ground bonding is configured per Eaton and local code requirements. Incorrect bonding can cause nuisance trips.