Waukesha Cherry-Burrell Troubleshooting
10/2010 95-03009 Page 71
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
n
e
cessary. Replace seals if required.
Wrong direction of rotation Adjust motor electrical wiring to correct rot
a
tion.
Discharge head too high Lower discharge head until pump can move
material without turning to fr
eely, causing
overload.
Suction lift too high Lower pump in system until the pump is easily
sup
p
lied with material.
Speed too slow (low voltage, wrong
freq
uency
, 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
H
ead) avai
lable
Adjust system to provide correct NPSH.
Impeller diameter too small for duty Contact your Waukesha Cherry-Burrell customer
service rep
resentative 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 rota
tion.
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 rep
resentative for sizing information.
WCB Customer Service:
1-800-252-5200 or 262-728-1900
Motor Overload Faulty electrical connections Check wiring and repair/replace as necessary.
Unrestricted discharge resulting in too
hi
gh a flow rate
Add discharge restriction to lower flow rate.
Impeller interference Disassemble pump and inspect for damage.
Remo
ve interference if still present. Replace
worn/damaged parts.
Seal binding Disassemble pump and inspect for damage.
Check
for material crystallization on seals.
Discharge head too low allowing pump to
de
liver too much liquid
Raise discharge head until pump achieves proper
resistance to flow.
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