Waukesha Cherry-Burrell Troubleshooting
12/2010 95-03080 Page 73
Troubleshooting
PROBLEM POSSIBLE CAUSE SUGGESTED ACTION
Not Enough Liquid Delivered
Pump not primed Prime pump. Install a priming system if
possible.
Suction or discharge plugged or
closed
Open suction. If plugged, shut down pump
and remove blockage.
Air leak in supply or at seal area Check system for air leaks and repair as
necessary. Replace seals if required.
Wrong direction of rotation Adjust motor electrical wiring to correct
rotation.
Discharge head too high Lower discharge head requirement.
Suction lift too high Lower pump in system until the pump is
easily supplied with material.
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 it reaches the pump.
Insufficient NPSH (Net Positive
Suction Head) available
Adjust system to provide correct NPSH.
Impeller diameter too small for
duty
Contact your Waukesha Cherry-Burrell
customer service representative for sizing
information.
WCB Customer Service
1-800-252-5200 or 262-728-1900
Not Enough Pressure
Air leak in supply or at seal area Check system for air leaks and repair as
necessary. Replace seals if required.
Wrong direction of rotation 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 Adjust system to remove excess air from
material before it reaches the pump.
Impeller diameter too small for
duty
Contact your Waukesha Cherry-Burrell
customer service representative for sizing
information.
WCB Customer Service
1-800-252-5200 or 262-728-1900
Motor Overload
Unrestricted discharge resulting in
too high a flow rate
Add discharge restriction to lower flow rate.
Impeller interference Disassemble pump and inspect for damage.
Remove interference if still present.
Replace worn/damaged parts.
Faulty electrical connections Check wiring and repair/replace as
necessary.
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