Err3
Zodiac
Overvoltage / High Line Voltage Fault
Zodiac pump controller shows ERR3 and the motor stops or will not start.
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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
Incorrect wiring (e.g., 277V on 230V pump), Utility overvoltage, Faulty transformer or supply, Internal drive protection
How to Fix / Troubleshooting
Safety: High voltage can be lethal. Only a qualified person should test live circuits.
- Confirm voltage rating: Check the Zodiac pump nameplate for rated voltage and compare to the actual supply voltage with a multimeter.
- Inspect wiring configuration: Ensure the pump is not accidentally connected to a higher-voltage leg or phase than specified.
- Check for miswired transformers: If the pump is fed from a transformer, verify its output voltage and tap settings.
- Reset and monitor: After correcting any wiring issues, reset the pump and monitor operation. If ERR3 recurs with correct voltage, the internal drive may be damaged.
Persistent overvoltage faults with correct supply require inspection or replacement of the pump's electronic drive module.
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Repair Difficulty
Professional Required
5/5
Required Part
Pump Drive / Control Module
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