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Problem Possible Causes Solution
Motor does not start, but does not
blow fuses or trip circuit breaker
Defective fuses or circuit breakers
Loose or corroded terminals
Damaged or defective connections
No incoming power
Replace fuses or circuit breakers.
Clean and tighten connections and
motor lead terminals.
Repair or replace connections.
Contact power company.
Motor starts, but fuses blow or
circuit breakers trip
Wrong voltage
Incorrect fuses or relay
Incorrect connections
Locked rotor or pump
Insufficient insulation on motor
cables
Make sure that nameplate rated
voltage matches nominal power
supply, and that actual supply voltage
is within ±10% of nameplate voltage.
Install correct fuses or relay.
Re-connect motor wires correctly.
Make sure that motor is at least 10ft
above bottom of well, check well for
sand.
Install new motor cables; recheck
resistance with Megohmeter.
Motor starts and runs, then blows
fuse or trips circuit breaker
Incoming voltage more than 10% high
or low sand in well
Confirm high or low voltage in motor
cable, consult power company.
Pull the pump and clean the well.
Motor does not start, but fuse
blows or circuit breaker trips
Locked rotor or pump Check for sand in well.
Make sure that motor is at least 10ft
above the bottom of the well.
Pull pump and check for mechanical
obstruction in the pump and for free
rotation of the motor.
SECTION 6: Pentek
®
6” Submersible Motors
6.11 Troubleshooting
Pentek 6” Motors
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