SPXFLOW C Series - Troubleshooting; Not Enough Liquid Delivered; Not Enough Pressure; Motor Overload

Troubleshooting Waukesha Cherry-Burrell
®
Brand C-Series Pump
01/2019 95-03008-IEC Page 81
Troubleshooting
Problem Possible Cause Suggested Action
Not Enough Liquid
Deliver
ed
Pump not primed. Prime pump. Install a priming system if
possible.
Suction or discharge plugged or
closed
.
Open suction. If plugged, shut down the
pump and remove blockage.
Air leak in supply or at seal area. Check system for air leaks and repair as
necessar
y. Replace seals if required.
Wrong direction of rotation. Adjust motor electrical wiring to correct
ro
tation.
Discharge head too high. Lower discharge head until pump can
move ma
terial without causing overload.
Modify system to have more back
pr
essure required.
Suction lift too high. Lower pump in system until the pump is
easily s
upplied with material.
Speed too slow (low voltage,
wro
ng frequency, wrong motor.
Adjust voltage and frequency. Change
motor if necessary.
Excessive air in material. Adjust system to remove exc
ess air from
material before it reaches the pump.
Insufficient NPSH (Net Positive
Su
ction Head) available.
Adjust system to provide correct NPSH.
Impeller diameter too small for
du
ty.
Contact SPX FLOW Application
Engineering for sizing information.
Not Enough Pressure Air leak in supply or at seal area. Check system for air leaks and repair as
necessar
y. Replace seals if required.
Wrong direction of rotation. Adjust motor electrical wiring to correct
ro
tation.
Speed too slow (low voltage,
wro
ng frequency, wrong motor).
Adjust voltage and frequency. Change
motor if necessary.
Excessive air in material. Adjust system to remove exc
ess air from
material before it reaches the pump.
Impeller diameter too small for
du
ty.
Contact SPX FLOW Application
Engineering for sizing information.
Insufficient NPSH (Net Positive
Su
ction Head) available.
Adjust system to provide correct NPSH.
Motor Overload Faulty electrical connections. Check wiring and repair/replace as
necessar
y.
Unrestricted discharge resulting in
to
o high a flow rate.
Add discharge restriction to lower flow
rate.