E10
Jacuzzi External Control / Communication Bus Fault

Pump display shows E10 and the unit will not respond to external automation commands.

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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

Reversed polarity on RS-485 or control wires, Shorted communication cable, Incompatible automation protocol, Faulty communication port on control board

How to Fix / Troubleshooting

Safety first: Turn off power to both the Jacuzzi pump and the automation system before working on control wiring.

Steps to check:

  • Verify wiring polarity: Check that A/B (or +/−) terminals on the pump match the automation controller's terminals.
  • Inspect cable: Look for nicks, crushed sections, or water-filled junction boxes along the communication cable run.
  • Test standalone: Disconnect the automation cable and power the pump. If it runs normally without E10, the issue is in the external control system or wiring.
  • Check protocol settings: Ensure the pump is configured for the correct automation brand/protocol per the Jacuzzi manual.

If E10 persists even with no external wiring connected, the communication interface on the control board is likely defective.

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Repair Difficulty

Medium 3/5

Required Part

Jacuzzi pump control board / communication interface
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