Audi
Nuisance Tripping / Earth Leakage or Overcurrent
Audi EV charger trips the upstream RCD/RCBO or main breaker whenever charging is started.
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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 RCD sensitivity with internal DC residual current device, Earth leakage from cable or vehicle, Incorrect type of upstream RCD (e.g., Type AC instead of Type A or B), Short circuit or wiring error in installation
How to Fix / Troubleshooting
Safety first: Repeated tripping indicates a potential safety issue. Do not simply replace breakers with higher ratings.
- Identify which device trips: Note whether the overcurrent breaker or the RCD/RCBO trips. This helps distinguish between overcurrent and leakage.
- Check RCD type: Verify that the upstream RCD is of the type recommended by Audi (often Type A or B) and compatible with EV chargers that have internal DC residual current detection.
- Test with another vehicle: If tripping only occurs with one vehicle, that vehicle may have higher leakage; have it inspected.
- Insulation testing: An electrician should perform insulation resistance tests on the charger cable and internal wiring, and verify correct polarity and earthing.
Correct any wiring errors, replace incompatible RCDs, and address insulation faults before resuming normal use.
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Repair Difficulty
Professional Required
5/5
Required Part
Upstream RCD/RCBO and Internal RCD Module
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