Troubleshooting - STA-RITE DPC Owner's Manual

Troubleshooting

Symptom
Failure to pump.
Reduced capacity and/or head (pressure).
Mechanical troubles and noise.
Probable Cause(s)
Pump not properly primed.
Speed too low.
Total head too high.
Suction lift too great.
Excessive air leak in suction line.
Water level drops while pumping, uncovering
suction inlet.
Air pocket or leaks in suction line.
Clogged impeller.
Foot valve strainer too small, or clogged.
Insufficient submergence of suction pipe.
Excessive dynamic suction lift (over 20 ft.).
Total head (pressure) more than that for which
pump was intended.
Excessively worn impeller.
Suction and/or discharge piping not properly
supported and anchored.
Motor runs hot and overload kicks off.
Corrective Action
Make sure pump body is full of water. See priming
instructions.
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 for loose connections.
A pump designed for high head service is needed.
Locate pump closer to source of water. Make sure suction
piping is large enough.
Check and repair suction line.
Check water supply. Add pipe to suction to keep it
submerged.
Check suction piping.
Remove and clean.
Use larger foot valve, clean.
Add lengths of suction pipe to keep it well below the water
surface.
If caused by suction pipe friction, enlarge piping and foot
valve. Otherwise move pump closer to water level.
A larger pump is needed.
Order replacement parts, using repair parts list in this
manual.
See that all piping is supported to relieve strain on pump
assembly.
Check the voltage dial on the motor to set it to the correct
input voltage.
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