Waukesha 200 series Operation And Maintenance Manual - Troubleshooting
Waukesha Cherry-Burrell
Troubleshooting
January 2003
95-03074
Page 27
Troubleshooting
PROBLEM
POSSIBLE CAUSE
SUGGESTED ACTION
Not Enough Liquid Delivered
Suction or discharge plugged or
closed.
Open suction. If plugged shutdown pump
and remove blockage.
Air leak in supply or at seal area.
Check system for air leaks and repair as
necessary. Replace seals if necessary.
Discharge head too high.
Lower discharge head until pump can
move material without turning too freely
causing overload.
Suction lift too high.
Lower pump in system until pump is
easily supplied with product.
Speed too slow (low voltage,
wrong frequency, wrong motor).
Adjust voltage and frequency. Change
motor if necessary.
Excessive air in material.
Adjust system to remove excess air from
material before reaching the pump.
Insufficient NPSH (Net Positive
Suction Head) available.
Adjust system to provide correct NPSH.
Not Enough Pressure
Air leak in supply or at seal area.
Check system for air leaks and repair as
necessary. Replace seals if necessary.
Speed too slow (low voltage,
wrong frequency, wrong motor).
Adjust voltage and frequency. Change
motor if necessary.
Excessive air in material.
Adjust system to remove excess air from
material before reaching the pump.
Motor Overload
Faulty electrical connections.
Check wiring and repair or replace as
necessary.
Impeller interference.
Disassemble pump and inspect for
damage. Remove interference if still
present. Replace worn or damaged parts.
Seal binding.
Disassemble pump and inspect for
damage. Check for material
crystallization on seals.
Liquid heavier or more viscous
than rating.
Contact your Waukesha Cherry-Burrell
Customer Service Representative for
sizing information.
WCB Customer Service Telephone:
1-800-252-5200 or 262-728-1900
Overload heaters too small for
motor.
Inspect and replace as necessary.
Electrical supply, voltage and
frequency incorrect.
Adjust voltage and frequency. Change
motor if necessary.
Defective motor.
Replace motor.
Discharge lead too low.
Increase discharge pressure.