Pump display shows ERR8 and the motor will not run; often occurs after the pump has been flooded or exposed to heavy rain.

Safety first: Do not attempt to run a pump suspected of having an earth fault. Turn off power at the breaker and keep the area dry. Risk of electric shock is significant.

• Inspect for visible water: Check around the motor terminal box and cable glands for signs of water entry. Do not open the motor if it is still wet; allow it to dry in a warm, ventilated area.
• Check cable condition: Look for cuts or crushed sections on the supply cable and at the gland entry to the motor.
• Allow extended drying: If the pump was briefly splashed, disconnect and move it to a dry, sheltered location for 24–48 hours, then have insulation resistance tested by a technician.

ERR8 generally requires professional testing with a megohmmeter. If insulation resistance is low, the motor must be repaired or replaced.