GROUND FAULT
OpenEVSE
Leakage Current Detection
Display alternates between 'GROUND FAULT' and idle screen, charging will not start or stops quickly.
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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
Leakage current from vehicle to ground, Damaged insulation in J1772 cable, Contaminated GFCI coil or board, Faulty ground fault detection circuit on main board
How to Fix / Troubleshooting
Safety first: Treat all ground faults as potentially dangerous. Do not continue charging until the cause is identified.
- Step 1 – Test with another EV: If available, connect a different vehicle. If the fault disappears, the original vehicle may have an internal leakage issue that needs dealer service.
- Step 2 – Inspect cable and handle: With power OFF, check the entire length of the cable and the J1772 handle for cuts, abrasions, or signs of water ingress. Replace the cable if any damage is found.
- Step 3 – Clean internal components: Open the enclosure and inspect the GFCI coil and surrounding area for dust, insects, or moisture. Gently clean and dry as needed.
- Step 4 – Board replacement: If the wiring and cable are good and the fault occurs with multiple vehicles, the ground fault detection circuit on the main board may be defective. Replace the main control board.
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Repair Difficulty
Hard
4/5
Required Part
GFCI Sense Coil
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