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5
TROUBLESHOOTING
SYMPTOM CAUSE REMEDY
Failure to
pump:
Pump not properly primed. Make sure pump casing and suction line are full of water. See prim-
ing instructions.
Speed too low.
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 connec-
tions.
Total head more than for which pump was
intended.
A pump designed for higher head needed.
Suction lift is too great. Locate pump closer to source of water. Make sure suction piping is
large enough.
Reduced
capacity and/
or head:
Air pockets or leaks in suction line. Check suction piping.
Clogged impeller. Remove and clean.
Strainer too small or clogged. Use larger strainer or clean.
Insufcientsubmergenceofsuctionline. Add lengths of suction pipe to keep submerged end well below the
water surface.
Excessive suction lift. If caused by suction pipe friction, enlarge piping.
Total head more than that for which the pump
was intended.
A pump designed for higher head is needed.
Excessively worn impeller. Order replacement parts using Repair Parts List.
Pump loses
prime:
Air leaks in suction line. Check suction piping.
Excessive lift and operating too near shut-off
point.
Move pump nearer water level.
Water level drops while pumping, uncovering
suction piping.
Check water supply. Add length of pipe to suction to keep submerged
end under water.
Mechanical
troubles and
noise:
Bent shaft and/or damaged bearings. Take motor to authorized motor repair shop.
Suction and/or discharge piping not properly
supported and anchored.
See that all piping is supported to relieve strain on pump assembly.
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