20
Instruction & Operation Manual
800.789.1718
Troubleshooting
Dixon Sanitary BC-Series pumps are manufactured and inspected to meet sanitary standards. Occasional problems may
arise. The following guide will help determine the possible cause and offer suggestions on corrections to maximize the
performance of your pump. In case of any electric motors issues, contact the motor manufacturer directly. If you have any
questions or concerns in regards to your BC-Series pump, we encourage you to contact Dixon Sanitary.
PROBLEM
POSSIBLE CAUSE
SUGGESTED ACTION
Not enough or no discharge
No fluid reaching pump.
Need to prime pump. Installation of a priming system is
recommended.
Suction or discharge closed or
blocked.
Open suction. If plugged, shutdown pump and remove
blockage. If closed, check all valves for proper positions.
Motor rotation incorrect.
Adjust motor electrical wiring to correct rotation.
Speed too slow (low voltage,
wrong frequency, wrong
motor).
Adjust voltage and frequency. Change motor if necessary.
Impeller damaged.
Replace impeller.
Seal area or supply area has
an air leak.
Replace seal if needed. Check all other areas for air leaks
and repair.
Excessive air in material.
Make any adjustments in system to insure excess air is
removed before material reaches the pump.
Discharge head too high.
Adjust system to lower discharge head.
Suction lift too high.
Adjust system to lower suction lift.
Insufficient NPSH (Net Positive
Suction Head) available.
Adjust system to provide correct NPSHa.
Impeller diameter not correct
for application.
Contact: Dixon Sanitary 800-789-1718
Not Enough Pressure
Seal area or supply area has
an air leak.
Replace seal if needed. Check all other areas for air leaks
and repair.
Motor rotation incorrect.
Adjust motor electrical wiring to correct rotation.
Speed too slow (low voltage,
wrong frequency, wrong
motor).
Adjust voltage and frequency. Change motor if necessary.
Excessive air in material.
Make any adjustments in system to insure excess air is
removed before material reaches the pump.
Impeller diameter not correct
for application.
Contact: Dixon Sanitary 800-789-1718
Motor Overload/Excessive
Power Consumption
Discharge is too high.
Restrict discharge to lower flow rate.
Impeller is binding.
Inspect pump and check for any damage, misalignment or
interference. Replace any damaged or worn parts.
Seal binding.
Inspect pump and replace any damaged or worn parts.
Discharge is too low.
Increase discharge head.
Liquid is heavier or more
viscous than rating.
Contact: Dixon Sanitary 800-789-1718
Electrical supply, voltage or
frequency incorrect.
Make any adjustments needed up to replacing the motor.
Faulty electrical connections.
Check wiring and repair/replace as necessary.
Overload heaters too small.
Inspect and replace as necessary.
Defective motor.
Contact motor manufacturer for possible warranty or repair.
Replace if needed.