U.S. Motors variable-speed pool pump displays E06 and stops; may occur randomly during operation.

Safety first: Turn off power at the breaker and verify the circuit is de-energized. Do not operate a pump suspected of ground fault; risk of electric shock.

• Inspect for moisture: Remove the motor terminal cover and controller cover. Look for condensation, water tracks, or corrosion on terminals and the control board. Dry thoroughly with a clean cloth and low-heat air (no open flame).
• Check insulation resistance: With all power disconnected and motor leads isolated, use a megohmmeter (500V or 1000V) between each motor lead and ground. Values below manufacturer recommendations (often < 1 MΩ) indicate insulation breakdown.
• Inspect cable and conduit: Look for cracked insulation, nicked wires, or water-filled conduit between the panel and pump.
• Correct moisture source: Seal conduit entries, replace gaskets on the terminal box, and ensure the pump is not being sprayed by irrigation or rain.
• Replace motor if leakage persists: If insulation resistance remains low after drying, replace the U.S. Motors motor. If the motor tests good but E06 persists, the drive's ground fault detection circuit may be defective.