E04
Amperfied
Residual Current / DC Leakage Fault
Charging stops or will not start; display shows E04 indicating residual current device (RCD) trip or DC fault.
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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
Actual earth leakage in vehicle or cable, Internal 6 mA DC sensor trip in charger, Faulty integrated RCD module, Damaged insulation on internal power wiring
How to Fix / Troubleshooting
Safety: Residual current faults indicate possible shock risk. Do not repeatedly reset without investigation.
- Disconnect and inspect cable: Unplug the vehicle and visually inspect the Type 2 cable for cuts, crushing, or exposed conductors. Replace the cable if any damage is found.
- Test with another vehicle or cable: If possible, try charging a different EV or use a different cable. If E04 only occurs with one vehicle or cable, that item is likely the source of leakage.
- Reset upstream RCD/RCBO: If the supply RCD/RCBO has tripped, reset it once. If it trips again immediately when starting a charge, stop and call an electrician.
- Have insulation tested: A qualified technician should open the wallbox and perform insulation resistance tests on the internal power wiring and check the integrated DC leakage sensor module.
- Replace faulty RCD module: If the integrated RCD/DC sensor is confirmed faulty, it must be replaced with the correct Amperfied‑specified module.
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Repair Difficulty
Professional Required
5/5
Required Part
Integrated RCD / DC Leakage Sensor Module
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