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Insulation fault shown on the charger

On a fast charger, a monitor checks that no current leaks to earth. An insulation fault stops charging to prevent an electric shock; it can come from the cable, the vehicle, the charger or the measurement itself.

Safety first

  • Never open the charger or the electrical panel: only a qualified person may work on it.
  • Burning smell, abnormal heat, smoke or crackling: stop charging from the vehicle or the app, do not touch the charger again and have a professional cut its power.
  • In case of smoke or flames, move away and call 112.
  • Never force out a hot or damaged cable.

What you can safely check

  1. Stop charging and do not retry in a loop on this charging point.
  2. Note the exact message or code, the charging point concerned and the time, and photograph the screen.
  3. Look from a distance to see whether the cable or plug is damaged, wet or dirty, without touching it if it is damaged.
  4. To charge, use another charger and report this one to its operator.

When to request a visit

  • Always: an insulation fault must be examined by a certified technician, even if the message disappears after a restart.
  • The fault appears with several vehicles or on several charging points.
  • The cable or plug is damaged, wet or hot.

Call a technician

Describe what you see: the price is quoted before the visit.

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Is the charge point down?
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Include the exact message, when the fault started and how many charge points are affected. Do not open equipment to answer.

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