Charger shows E17; often logged as ‘isolation fault’ or ‘insulation resistance too low’.

Danger: Isolation faults can present a shock hazard. Do not continue using the charger until checked.

• Stop charging and disconnect: Unplug the vehicle and switch off the charger at the breaker.
• Check for visible moisture: Look for condensation, water droplets, or signs of water entry around the housing, cable gland, and socket. If present, do not power the unit until it has been professionally dried and sealed.
• Test with another vehicle: After the unit has been inspected and dried, if safe, test with a different EV to rule out a vehicle‑side isolation issue.
• Technician tests: A qualified technician should perform insulation resistance tests on internal wiring and verify the operation of the insulation monitoring device or equivalent circuit. Replace damaged wiring or IMD as required.