Display shows 'OVERCURRENT' or 'OC FAULT', charging stops abruptly, breaker may trip.

Safety first: If the breaker has tripped, do not repeatedly reset it without finding the cause. Overcurrent can overheat wiring.

• Step 1 – Check settings: Using the LCD or Wi-Fi interface, verify that the maximum current setting matches the circuit rating (e.g., 24 A max on a 30 A circuit, 40 A max on a 50 A circuit).
• Step 2 – Try another vehicle: If possible, test with a different EV to rule out a vehicle-side charger fault.
• Step 3 – Inspect cable: With power OFF, examine the J1772 cable for cuts, melted spots, or crushed sections. Replace the cable if any damage is found.
• Step 4 – CT wiring check: Inspect the current transformer (CT) on the line conductor. Ensure it is properly clamped around the correct conductor and that its leads are firmly connected to the CT board or main board.
• Step 5 – Compare measured current: If you have a clamp meter, compare the actual current to what the OpenEVSE reports. If the CT is reading much higher than actual, the CT or CT board may be faulty and should be replaced.