Charging session stops immediately with E02; LEDs show fault as soon as vehicle requests current.

Safety first: Do not repeatedly reset and attempt to charge if a ground fault is indicated. There is a risk of electric shock.

Steps to troubleshoot:

• Visually inspect the cable: Look along the entire length of the Walli charging cable for cuts, abrasions, or crushed sections. If copper is visible or the jacket is deeply damaged, stop using the charger.
• Check for moisture: Inspect the vehicle connector and the area where the cable enters the Walli housing. If there is condensation or water, allow the unit to dry completely (at least 24 hours in a dry environment) before retesting.
• Test with another vehicle: If possible, try charging a different EV to rule out a vehicle‑side insulation fault.
• Power cycle: Turn off the breaker feeding the Walli charger for 5 minutes, then restore power and attempt a new session.
• If E02 returns immediately: The internal RCD sensor or associated circuitry on the Walli main control board may be defective. Do not bypass or disable the RCD. Arrange for replacement of the RCD module or entire control board by a qualified electrician.