Safety first: Electrical measurements must be performed by a licensed electrician where required by law. Isolate power before opening any covers.

Step-by-step checks:

1. Confirm correct supply: Check the pump rating label to ensure it matches your supply (e.g. 230–240 V single phase). If in doubt, consult an electrician.
2. Avoid shared circuits with large motors: If the pump shares a circuit with large compressors or welders, ask an electrician to move it to a dedicated circuit.
3. Have voltage tested: An electrician should measure the supply voltage at the pump and at the switchboard to confirm it is within the allowable range.
4. Surge protection: Consider installing surge protection if your area experiences frequent voltage spikes.

If E6 continues with normal supply voltage, the pump's internal electronics may be misreading voltage and need service.

Davey pool pump controller shows E6 and the motor will not run.

Possible Causes