E14
Lowara
Motor Feedback / Speed Sensor Error (if equipped)
Pump shows E14, speed fluctuates, sometimes accompanied by humming
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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 or damaged motor feedback cable, Faulty tachometer or Hall sensor on motor, Incorrect parameter settings for feedback type, Electrical noise on feedback lines
How to Fix / Troubleshooting
Safety first: Isolate power before working on motor or feedback wiring.
- Check feedback connections: Locate the motor feedback connector on the Lowara drive and motor. Ensure the plug is fully seated and the cable is undamaged.
- Inspect cable routing: Keep feedback cables separated from high‑voltage motor leads to reduce interference.
- Verify parameters: In the drive menu, confirm that the motor control mode and feedback type match the actual hardware (sensorless vs. sensored).
- Test in open‑loop mode: If possible, temporarily switch to open‑loop (sensorless) control. If the pump runs normally, the feedback device may be faulty.
- When to call a pro: Replacement of motor feedback sensors or advanced parameter tuning should be done by a technician familiar with Lowara drives.
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Repair Difficulty
Hard
4/5
Required Part
Lowara motor feedback sensor/cable
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