Pump trips the circuit breaker immediately or within a few seconds of starting

Safety first: Leave the breaker OFF until the fault is identified. Do not repeatedly reset a tripping breaker.

• Inspect external wiring: Check the Harris pump's power cable or conduit for cuts, crushed sections, or burn marks. Repair or replace damaged wiring.
• Verify correct voltage wiring: Confirm the motor is wired for the correct supply voltage per the Harris wiring diagram. Incorrect jumper configuration can cause overcurrent.
• Check for moisture: Open the motor and control covers and look for water or corrosion. Dry thoroughly and correct any sealing issues.
• Motor insulation test: Have a technician perform a megohmmeter test on the motor windings. If insulation is low, replace the motor.

Persistent breaker trips after wiring and moisture checks usually indicate a failing motor or control module that must be replaced.