Display shows E03 and charging stops or will not start; vehicle may show a ground fault or EVSE error.

Safety: This is a ground fault condition. Do not continue using the charger until the cause is identified. Turn OFF the breaker and verify the unit is de-energized.

• 1. Inspect for moisture:
  • Check the J1772 handle for signs of water ingress, condensation, or corrosion.
  • If the charger is installed outdoors, inspect the enclosure gasket and cable entry glands for leaks.
• 2. Dry the components:
  • Allow the handle and cable to dry in a warm, dry area for at least 24 hours.
  • Do not use heat guns directly on plastic parts.
• 3. Inspect the cable:
  • Look for cuts, abrasions, or crushed sections that could expose conductors.
  • If any damage is found, replace the AMPROAD output cable assembly.
• 4. Internal inspection (qualified persons only):
  • Open the charger enclosure with power OFF.
  • Check the internal GFCI/RCD module and wiring for signs of moisture, corrosion, or carbon tracking.
  • Tighten terminal block screws and ensure no strands are loose or touching the enclosure.
• 5. Test after drying:
  • Once everything is dry and visually sound, re-energize the breaker and test with a known-good vehicle.
  • If E03 persists, the internal GFCI/RCD module or main control board is likely faulty and should be replaced.
• Do not bypass safety: Never bypass or short the ground fault detection circuit. If you cannot clear E03 with basic checks, contact an AMPROAD-authorized technician.