Lifan Downstream Short Circuit / Ground Fault

Generator output breaker trips immediately when connecting to load, but no controller error code is shown.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Shorted load circuit in building, Incorrect wiring at generator lugs, Faulty main breaker, Neutral-to-ground bond issue

How to Fix / Troubleshooting

Safety first: Only qualified electricians should troubleshoot building wiring. Isolate generator and utility before working on circuits.

  • Test generator alone: With the main breaker OFF, start the Lifan generator and verify stable voltage at the lugs.
  • Inspect wiring: Confirm correct phase, neutral, and ground connections at the generator and ATS. Correct any miswiring.
  • Isolate loads: Turn off all branch breakers in the building, then close the generator breaker. Turn on branch circuits one at a time to identify the faulty circuit.
  • Breaker test: If the breaker trips with no load connected, replace the main circuit breaker.
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Repair Difficulty

Hard 4/5

Required Part

Main Circuit Breaker
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