Charging stops shortly after starting; Siemens charger shows E003 and vehicle stops drawing current.

Safety first: A ground fault can be dangerous. Do not repeatedly reset and continue using the charger without identifying the cause.

• Visual inspection: Disconnect the vehicle and power down the charger. Inspect the cable, plug, and wallbox housing for cracks, water ingress, or burn marks.
• Drying and environment: If the charger or connector has been exposed to rain or high humidity, allow it to dry thoroughly. Ensure the wallbox is properly sealed and that cable glands are tight.
• Test with another vehicle/cable: If possible, test the charger with a different EV and/or a different Type 2 cable. If E003 only occurs with one vehicle or cable, that component is likely at fault.
• Check earth connection: Have an electrician verify the integrity of the PE conductor from the distribution board to the Siemens charger, including earth resistance and bonding.
• RCD test: Many Siemens EV chargers include an internal DC-sensitive RCD module. A qualified technician can test this module using an RCD tester to confirm correct operation.

If E003 recurs with multiple vehicles and cables and the supply earth is correct, the internal RCD or leakage detection circuitry may need replacement by Siemens service.