PROBLEM
Failure to
Pump not properly primed.
pump
Speed too low.
Total head too great for pump.
Suction lift is too great.
Reduced ca-
Air pockets or leaks in suction line.
pacity and/or
Clogged impeller.
head
Strainer too small or clogged.
Insuffi cient submergence of suction line.
Excessive suction lift.
Total head too great for pump.
Excessively worn impeller.
Pump loses
Air leaks in suction line.
prime
Excessive lift and operating too near shut-off point.
Water level drops while pumping, uncovering suc-
tion piping.
Mechanical
Bent shaft and/or damaged bearings.
troubles and
Suction and/or discharge piping not properly sup-
noise
ported and anchored.
TROUBLESHOOTING
PROBABLE CAUSE
CORRECTIVE ACTION
Ensure that pump casing and suction line are full of water.
See priming instructions.
WARNING - ELECTRICAL PRECAUTIONS
All wiring, electrical connections and system grounding
must comply with the National Electrical Code (NEC) and
with any local codes and ordinances. Employ a licensed
electrician. Check voltage at motor terminals and at meter
when pump is operating. If low, refer to wiring instructions or
check with your power company. Check loose connections.
A pump designed for higher head is needed.
Locate pump closer to source of water. Ensure suction end
is fully submerged.
Check suction piping.
Remove and clean.
Use larger strainer or clean.
Add lengths of suction pipe to keep end well submerged.
If caused by suction pipe friction, enlarge piping.
A pump designed for higher head is needed.
Order replacement parts using Repair Parts List.
Check suction piping.
Move pump nearer to water level.
Check water supply. Add length of pipe to suction to keep
submerged end under water.
Take motor to authorized motor repair shop.
Ensure that all piping is supported to relieve strain on pump
assembly.
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