E10
Pahlen Undervoltage / Low Supply Voltage

Pahlén pool pump controller shows E10 and pump will not start after a power outage

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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

Weak supply from main panel, Undersized wiring to Pahlén pump, Loose neutral or phase connection, Voltage drop due to long cable run

How to Fix / Troubleshooting

Safety first: Only qualified personnel should measure live voltages. Always isolate power before tightening terminals.

  • Check main supply: Have an electrician measure voltage at the pump terminals while attempting to start. Compare with the rated voltage on the Pahlén pump nameplate.
  • Inspect wiring: With power off, check that all terminals in the junction box and control panel are tight and free of corrosion.
  • Assess cable size: Verify that the cable cross-section matches Pahlén's installation recommendations for the pump power and distance. Undersized cables may need upgrading.
  • Reset controller: After correcting supply issues, reset E10 and test pump operation.

Persistent undervoltage can damage the motor; do not bypass this protection. Resolve the electrical supply problem before continued use.

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Repair Difficulty

Professional Required 5/5

Required Part

Power Supply Cable
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