E9
Poolex Earth Leakage / Ground Fault Detection

Poolex pool heater shows E9 and will not start; may be accompanied by tripped breaker.

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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 ingress causing leakage to ground, Damaged compressor or fan motor insulation, Faulty Poolex RCD/GFCI module (if integrated), Wiring insulation damage

How to Fix / Troubleshooting

Safety: This indicates a potential electric shock hazard. Do not attempt to bypass safety devices.

Steps:

  • Inspect for water ingress: Check inside the unit for standing water, wet insulation, or dripping onto electrical parts. Dry thoroughly and correct any leaks.
  • Check external RCD/GFCI: Reset the device once after drying. If it trips again, leave it off.

A qualified electrician or technician should perform insulation resistance tests on the compressor, fan motor, and wiring. Replace any component with low insulation resistance, such as the Poolex compressor or fan motor.

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Repair Difficulty

Professional Required 5/5

Required Part

Integrated RCD/GFCI Module
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