E15
Pahlen
Speed Feedback / Tachometer Fault (VS Models)
Pahlén pump controller shows E15 and pump speed fluctuates erratically
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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
Faulty motor speed sensor, Damaged feedback cable between motor and drive, Loose connector on Pahlén drive, Internal drive fault
How to Fix / Troubleshooting
Safety first: Turn off power before accessing the drive or motor terminal box.
- Inspect feedback cable: Locate the low-voltage cable from the motor to the Pahlén drive. Check for cuts, abrasions, or crushed sections. Ensure connectors are fully seated.
- Secure wiring: Route the feedback cable away from high-voltage cables to reduce electrical noise.
- Test in manual mode: If possible, run the pump at a fixed speed and observe whether E15 appears. Intermittent faults often indicate a loose connection.
- Replace sensor/cable: If visual inspection shows damage, replace the speed sensor or cable with original Pahlén parts.
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Repair Difficulty
Hard
4/5
Required Part
Motor Speed Sensor Cable
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