Charger shows E03 and will not start; sometimes trips immediately when vehicle is connected.

Safety warning: A ground fault can be hazardous. If you smell burning, see smoke, or feel tingling when touching metal parts, stop using the charger and shut off power at the breaker immediately.

• Visual inspection for moisture: Disconnect from vehicle. Inspect the connector for water, condensation, or corrosion. Dry thoroughly with a clean cloth and allow several hours in a dry environment before retesting.
• Check cable and housing: Look for cuts, abrasions, or crushed sections of the GoCable cord. Inspect the charger housing for cracks or signs of water ingress.
• Verify ground connection: With power OFF, open the charger and confirm the ground (earth) wire is securely fastened to the ground terminal and chassis. Tighten any loose screws.
• Reset RCD: Some GoCable models have an internal RCD test/reset button. After ensuring everything is dry and intact, press the reset button with power restored and see if E03 clears.
• Insulation resistance test (advanced): A qualified technician can perform a megohmmeter test between live conductors and ground to confirm cable integrity.
• If E03 recurs frequently: Replace the RCD / ground fault sensor module or the charge cable assembly as indicated by test results. This work should be done by a licensed electrician.