Siemens Contact Wear / Delayed Contactor Operation

Visible arcing or sparking when plugging in or unplugging the Type 2 connector from the Siemens charger or vehicle.

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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

Worn or pitted pins in Type 2 connector, Contactor closing too early or opening too late due to control fault, Loose pin crimp inside connector, User disconnecting under load due to faulty interlock

How to Fix / Troubleshooting

Safety first: Stop using the charger immediately if you observe arcing. Arcing can cause burns and fire.

  • Inspect connector: Examine the Type 2 plug and vehicle inlet for burn marks, melted plastic, or deformed pins. Replace damaged connectors.
  • Check locking function: Ensure the connector lock engages properly before current flows. If the plug can be removed while charging, the lock or interlock is faulty.
  • Observe contactor timing: A technician can monitor when the contactor closes relative to plug insertion; premature closure indicates a control issue.
  • Educate users: Remind users not to forcefully unplug during active charging; always stop the session via vehicle or charger first.

Persistent arcing indicates a serious fault in the connector or contactor control and requires professional repair or replacement of affected parts.

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Repair Difficulty

Hard 4/5

Required Part

Type 2 Connector / Main Power Contactor
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