E09
U.S. Motors
Speed Feedback / Tachometer Fault (VS Motor)
U.S. Motors pool pump controller shows E09 and the motor speed fluctuates or fails to reach set RPM.
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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
Failed internal speed sensor in U.S. Motors VS motor, Loose or corroded feedback connector between motor and drive, Damaged feedback cable, Faulty control board input circuit
How to Fix / Troubleshooting
Safety first: Disconnect power at the breaker before accessing internal connectors.
- Inspect feedback connections: Locate the low-voltage feedback connector between the motor and the drive/control board (refer to U.S. Motors wiring diagram). Unplug and re-seat the connector to clear oxidation. Ensure it is fully latched.
- Check cable condition: Examine the feedback cable for cuts, kinks, or rodent damage. Replace if any conductors appear compromised.
- Visual inspection of board: Look for corrosion or burned components near the tachometer input on the control board.
- Test operation: Restore power and attempt to run the pump at a low speed. If E09 returns immediately, the speed sensor inside the motor or the control board is likely defective.
- Replace affected component: Replace the U.S. Motors VS motor assembly if the sensor is integrated, or replace the control board if diagnostics point to a bad input circuit.
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Repair Difficulty
Hard
4/5
Required Part
U.S. Motors Variable-Speed Motor Assembly
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