E19
Chevrolet Internal Isolation / Insulation Fault

Charger displays E19 and the LEDs indicate a fault immediately at power-up, even with no vehicle connected.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Moisture or conductive dust inside charger, Damaged insulation on internal wiring, Failed insulation monitoring device (if equipped), Water ingress through conduit or cable gland

How to Fix / Troubleshooting

Safety first: This can indicate a shock hazard. Turn OFF the breaker and do not use the charger until inspected.

  • Step 1 – Inspect for water: Remove the cover and look for water droplets, rust, or mineral tracks. If present, dry the unit thoroughly and identify the leak path.
  • Step 2 – Check conduit and glands: Ensure that conduit entries and cable glands are sealed and oriented to prevent water entry.
  • Step 3 – Clean contamination: With power OFF, gently clean any dust or debris from the PCB and wiring using dry compressed air.
  • Step 4 – Insulation test (electrician): Have an electrician perform insulation resistance tests on the branch circuit and internal wiring.
  • Step 5 – Replace damaged parts: Any wiring with damaged insulation or a failed insulation monitoring device must be replaced before returning the charger to service.
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Repair Difficulty

Professional Required 5/5

Required Part

Internal Wiring Harness / Insulation Monitoring Circuit
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