E12
Andersen PEN Conductor / PME Monitoring Fault

Charger shows E12; app reports 'PEN/PME Fault – Earth Reference Lost'.

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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

Loss of neutral/earth reference on PME supply, Faulty PEN fault detection circuit on main control PCB, Incorrect configuration of earthing type in Andersen setup, Loose earth/neutral link in supply

How to Fix / Troubleshooting

Critical safety warning: A PEN/PME fault can expose live parts and create dangerous touch voltages. Do not use the charger. Turn off the circuit at the consumer unit and do not reset until inspected.

User actions:

  • Isolate the charger by switching OFF its breaker/RCBO.
  • Check if other circuits in the property are affected (lights dimming, other RCDs tripping) and report this to your electrician or DNO.

For a qualified electrician:

  • Verify supply earthing arrangement and continuity of PEN conductor if applicable.
  • Measure voltage between line, neutral, and earth at the Andersen supply point.
  • Confirm correct configuration of earthing type in the Andersen commissioning settings.
  • If supply is sound, test the PEN/PME monitoring circuit on the main control PCB and replace the PCB if faulty.
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Repair Difficulty

Professional Required 5/5

Required Part

Main Control PCB with PEN Monitoring
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