Charger display shows E02 and refuses to start charging; sometimes trips the breaker when attempting to charge.

Safety first: Turn OFF the breaker to the Besenergy charger. Do not continue resetting a tripping breaker; this can be dangerous.

• 1. Inspect for moisture: Check the J1772 connector and the area around the charger for signs of water ingress (rain, sprinklers, car washing). If wet, disconnect from power and allow the unit and connector to dry for at least 24 hours in a warm, dry location.
• 2. Examine the cable: Look for cuts, abrasions, or crushed sections along the entire length of the output cable. Any visible damage can allow leakage current to ground. If found, the cable assembly must be replaced.
• 3. Verify ground connection: With power OFF and cover removed (qualified persons only), check that the green/yellow ground wire is securely fastened to the ground terminal and chassis. Tighten if loose and remove any corrosion.
• 4. Reset and test: After drying and inspection, restore power and clear the error by unplugging from the vehicle, waiting 30 seconds, and reconnecting. If E02 persists with multiple vehicles, the internal ground fault sensor or control board is likely defective.
• 5. Do not bypass safety: Never attempt to bypass the ground fault protection or disconnect the ground wire. This is a critical safety feature.

When to call a professional: If the error persists after drying and visual inspection, or if the breaker continues to trip, contact a licensed electrician or EVSE technician to test insulation resistance and replace the internal ground fault sensor or main control board.