Charger shows E107 and will not charge; app may indicate 'Ground impedance too high' or 'No protective earth'.

Shock hazard: Do not use the charger until the ground fault is corrected. Turn OFF the breaker immediately.

• Visual inspection: If accessible per the manual, remove the charger cover with power OFF and verify the green or bare ground wire is securely landed on the ground terminal. Do not loosen or move other conductors.
• Panel ground check (electrician): A licensed electrician should verify continuity from the charger ground terminal back to the main service ground and check for corrosion or loose bonds.
• Do not defeat ground: Never use adapters or modifications that remove the ground connection to clear this error.
• If wiring is correct: The internal ground impedance sensing circuit may be defective. A technician can measure ground impedance and replace the control board if necessary.