Charger shows E07 / ‘Relay Welded’ or ‘Contactor Fault’ and refuses to start charging.

Safety first: Turn OFF the breaker and verify absence of voltage before opening the charger. This fault involves high-voltage components.

• Listen for contactor operation: When starting a charge (with cover on), you should normally hear a click. If E07 appears and no click is heard, the contactor may not be actuating.
• Technician inspection: A qualified technician should open the charger, visually inspect the main power contactor for discoloration, burning, or mechanical damage, and test coil resistance.
• Check for welded contacts: With power OFF and wires removed, measure continuity across the contactor’s main contacts. If continuity is present when the coil is not energized, the contacts are welded and the contactor must be replaced.
• Verify control signal: If the contactor is mechanically sound, the technician should verify that the control board is providing the correct coil voltage when a charge is requested.
• Replace faulty component: Replace the main power contactor if welded or mechanically failed. If the coil is not being driven, replace or repair the main control board.