Walli Nuisance Tripping / Real Ground Fault

Walli charger trips the upstream RCD or breaker as soon as a charging session starts.

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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 exceeding upstream RCD rating, Incompatible RCD type with Walli charger, Internal insulation fault in Walli power module, Damaged output cable causing leakage to earth

How to Fix / Troubleshooting

Safety first: Repeated tripping indicates a potential fault. Do not bypass protective devices.

Steps:

  • Identify device tripping: Determine whether the main breaker, RCD, or a combined RCBO is tripping.
  • Check RCD type: Verify that the upstream RCD is of a type compatible with EV chargers (often Type A or B as specified by Walli). Replace if incorrect.
  • Inspect cable and charger: Look for visible damage or moisture on the Walli unit and cable.
  • Test with another circuit (technician): Temporarily connect the Walli to a known‑good, correctly protected circuit to see if tripping persists.
  • If tripping continues: Perform insulation and leakage tests on the Walli charger and cable. Replace the cable or Walli power module if a fault is found.
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Repair Difficulty

Professional Required 5/5

Required Part

Walli power module
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