EO charger displays E09; charging is disabled and app may report insulation or isolation fault.

Safety first: An insulation fault can cause electric shock. Do not attempt to bypass isolation monitoring. Isolate power before inspection.

• Check for moisture: Inspect the Type 2 plug, socket, and cable glands for signs of water ingress. Dry thoroughly and, if seals are compromised, replace the affected connector or gland.
• Visual inspection of wiring: With the cover removed and power off, look for nicks, cuts, or crushed insulation on internal conductors, especially where they pass through glands or around sharp edges.
• Insulation resistance test (qualified electrician): Disconnect the charger output from the internal circuitry as per EO service instructions and perform an insulation resistance test between line/neutral and earth. Values below manufacturer or regulatory thresholds indicate a fault.
• Check cable routing: Ensure that no conductor is pinched between the enclosure and cover and that all grommets and bushings are correctly installed.
• Replace damaged components: Replace any cable, connector, or wiring harness with compromised insulation. If all external components test good, the insulation monitoring circuit on the PCB may be faulty and require replacement.