Err5
Zodiac
Communication / Control Fault
Zodiac pump display shows ERR5 and the motor will not run or stops unexpectedly.
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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 communication cable between pump and Zodiac automation, Damaged RS-485 or control wiring, Firmware incompatibility, Failed control board
How to Fix / Troubleshooting
Safety: Turn off power to both the pump and the automation system before handling cables.
- Inspect communication cable: Check the low-voltage cable between the Zodiac pump and the automation panel (e.g., RS-485). Ensure connectors are fully seated and not corroded.
- Check wiring polarity: Verify that A/B (or +/−) terminals are wired consistently between devices according to Zodiac's wiring diagram.
- Test standalone: Disconnect the automation control cable and try running the pump from its local control panel. If it runs normally, the issue is likely in the automation system.
- Update firmware: Consult Zodiac documentation or a technician to ensure pump and controller firmware are compatible.
If communication errors persist, the control board in the pump or automation system may require replacement.
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Repair Difficulty
Hard
4/5
Required Part
Pump Control Board
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