E15
Primecom Vehicle Communication / EVSE State Transition Fault

Charger shows E15 and the display may indicate a communication or vehicle error.

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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

Vehicle not responding to pilot signal, Incompatible or damaged vehicle inlet, Timing issue between EV and Primecom charger, Faulty pilot monitoring circuit

How to Fix / Troubleshooting

Safety first: This error usually indicates a coordination issue rather than a high-voltage fault, but always handle connectors carefully.

  • 1. Disconnect and reconnect: Unplug the J1772 connector from the vehicle, wait 10 seconds, and plug it back in firmly until the latch clicks.
  • 2. Try another vehicle: If available, test the Primecom charger with a different EV to determine whether the issue is with the charger or the original vehicle.
  • 3. Check for adapter issues: If using a Tesla or other adapter, inspect the adapter for damage and test with a different adapter if possible.
  • 4. Power-cycle the charger: Turn off power for 2 minutes, then restore and retry.
  • 5. Persistent E15 with multiple vehicles: Suggests a fault in the pilot monitoring or state machine logic on the main control board; replacement is typically required.
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Repair Difficulty

Medium 3/5

Required Part

Pilot Monitoring Circuit on Main Control Board
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