E05
Andersen Input Overvoltage Protection

Charger displays E05 and will not start; app shows 'Overvoltage Detected'.

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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

Supply voltage above Andersen design limit, Loose neutral causing floating voltage, Faulty voltage sensing circuit on main control PCB, Incorrect supply configuration (e.g. connected to wrong phase or tapping)

How to Fix / Troubleshooting

Safety first: Overvoltage can damage the charger and EV. Do not attempt to charge until the supply is checked.

User actions:

  • Note the time and conditions when E05 occurs (e.g. during storms, at night). This can help your electrician or DNO.
  • Power cycle the charger once to confirm the error is persistent, not transient.

For a qualified electrician:

  • Measure line‑to‑neutral voltage at the Andersen supply terminals under load. Confirm it is within local limits (typically 230V ±10% in the UK/EU).
  • Check for loose neutral or shared neutral issues in the supply circuit.
  • If supply is stable and within spec, test the voltage sensing components on the main control PCB.
  • Replace the main control PCB if its sensing circuit is out of calibration or faulty.

If the supply voltage is genuinely high, contact the Distribution Network Operator (DNO) to investigate.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Control PCB
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