Display shows E03 and charging stops or will not start; unit may click repeatedly as relays attempt to engage.

Safety first: Turn OFF the breaker and lock it out if possible. High-voltage components inside the charger can be lethal.

• 1. Listen for relay operation: With the cover on and power restored, plug in the vehicle and listen. A healthy charger will click once or twice as the contactor engages. Rapid clicking or no click at all suggests relay issues.
• 2. Power down and open housing (qualified only): After turning power OFF, remove the cover. Locate the main power relay/contactor module (usually a block with heavy gauge wires).
• 3. Inspect wiring and terminals: Check for loose screws, discoloration, or melted insulation at the relay terminals. Tighten any loose connections and replace any burnt wiring.
• 4. Check for welded contacts: If the relay appears stuck closed (continuity across contacts even when the unit is off), it is unsafe and must be replaced. Do not attempt to file or repair contacts.
• 5. Replace the relay/contactor: If the coil is open or the relay is welded, replace it with the exact Besenergy-specified contactor model. Ensure all connections are torqued to manufacturer specs.
• 6. If relay tests good: The relay drive circuit on the main control board may be faulty. Board-level repair is not recommended for end users; replace the main control board or entire charger.

When to call a professional: Any work on high-current relays should be done by a qualified technician or electrician familiar with EVSE equipment.