E03
Jacuzzi Phase Loss / Single-Phase Operation Detected (for 3‑phase or inverter-driven models)

Pump display shows E03 and motor does not run, often after a storm or wiring work.

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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

Loose motor lead at terminal block, Blown internal fuse on one phase, Failed IGBT or output stage on drive module, Open winding in motor stator

How to Fix / Troubleshooting

Safety first: Disconnect power at the main pool panel. Only qualified persons should open motor and drive compartments.

Steps to check:

  • Inspect terminal block: Remove the rear cover of the Jacuzzi pump motor. Check that all three motor leads (for 3‑phase or inverter output) are tight and not burnt.
  • Check for discoloration: Look for melted insulation or darkened terminals indicating overheating.
  • Measure winding resistance: With power OFF and wires disconnected, measure resistance between each pair of motor leads. All three readings should be similar. A very high or open reading indicates a failed winding.
  • Inspect drive module: If the motor windings test good, the fault is likely in the drive module output stage. Look for bulged capacitors or burnt components (visual only).

Phase loss faults typically require replacement of the drive module or motor. Do not bypass safety protections.

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Repair Difficulty

Professional Required 5/5

Required Part

Jacuzzi variable-speed drive module
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