Volvo External RCD / Breaker Nuisance Trip

Charger trips the upstream RCD/GFCI or main breaker as soon as charging starts, but no code is shown on the charger.

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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

Combined sensitivity of internal Volvo RCD and upstream RCD, Neutral‑earth fault in installation wiring, Leakage current from moisture in cable or connector, Overloaded circuit due to other loads on same breaker

How to Fix / Troubleshooting

Safety first: Repeated tripping indicates a potential safety issue. Do not repeatedly reset without investigation.

  • Check circuit design: Verify the charger is on a dedicated circuit without additional outlets or loads.
  • Inspect for moisture: Examine the cable, connector, and wallbox for water ingress. Dry thoroughly before retesting.
  • Have wiring tested: An electrician should test for neutral‑earth faults and verify correct RCD type and rating for EV charging.

If the installation is correct and dry but trips persist, the charger’s internal leakage or RCD behavior should be evaluated by a professional; internal components may need replacement.

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Repair Difficulty

Hard 4/5

Required Part

Volvo EV Home Charger Integrated RCD / DC Residual Current Sensor
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