Charger shows E04 and does not start charging; sometimes occurs after a power outage or surge.

Safety first: Turn OFF the breaker before opening the charger. Use a properly rated multimeter and follow electrical safety practices.

• 1. Verify supply voltage: With the cover removed and power ON (only if you are qualified), measure voltage at the EvoCharge input terminals. Confirm it matches the unit rating (commonly 208–240 VAC). If voltage is outside the acceptable range, contact your electrician or utility.
• 2. Check terminal tightness (power OFF): Turn OFF the breaker. Tighten all line, neutral (if used), and ground connections at the EvoCharge terminal block to manufacturer torque specs. Loose connections can cause voltage drops and E04 errors.
• 3. Inspect for heat damage: Look for discoloration or melted insulation around the input terminals and internal power supply area. Heat damage indicates poor connections or overload.
• 4. Power-cycle and retest: After tightening and inspection, restore power and attempt to charge. If E04 clears, monitor for recurrence.
• 5. Internal power supply check: If line voltage is stable but E04 persists, the internal low-voltage power supply on the EvoCharge control board may be failing and require board replacement.

If you are not comfortable working with live circuits, have a licensed electrician perform these checks.