23833A115
TROUBLESHOOTING CHECKLIST
(CAUTION: SHUT OFF POWER TO PUMP)
PROBLEM
POSSIBLE CAUSES
Pump does not run or hums.
• Line circuit breaker is off, or fuse is blown or loose.
• Water level in sump has not reached turn-on level as indicated in installation drawing.
• Pump cord is not making contact in receptacle.
• Float is stuck. It should operate freely in basin.
• If all of the above are OK, then the motor winding may be open.
Pump runs but does not deliver
water.
• Check valve is installed backward. Arrow on valve should point in direction of fl ow.
• Discharge shutoff valve (if used) may be closed.
• Pump is air-locked. Start and stop several times by plugging and unplugging cord. Check for
clogged vent hole in pump case.
• Impeller or volute openings are fully or partially clogged. Remove pump and clean.
• Inlet holes in pump base are clogged. Remove pump and clean the openings.
• Vertical pumping distance is too high. Reduce distance or resize pump.
Pump runs and pumps out
sump, but does not stop.
• Float is stuck in up position. Be sure fl oat operates freely in basin.
• Defective
fl oat switch. Replace with fl oat switch RSMA for R2SA, R3S and R5S-1.
• Defective vertical switch. Replace with vertical switch RVS for R3V and R5V.
Pump runs but delivers only a
small amount of water.
• Pump is air-locked. Start and stop several times by plugging and unplugging cord. Check for
clogged vent hole in pump case.
• Vertical pumping distance is too high. Reduce distance or resize pump.
• Inlet holes in pump base are clogged. Remove pump and clean the openings.
• Impeller or volute openings are fully or partially clogged. Remove pump and clean.
• Pump impeller is partially clogged with tar or paint, causing motor to run slow and overload.
Remove pump and clean.
Fuse blows or circuit breaker
trips when pump starts.
• Pump impeller is partially clogged with tar or paint, causing motor to run slow and overload.
Remove pump and clean.
• Motor stator may be defective.
• Fuse size or circuit breaker may be too small. Must be 15 amps.
• Impeller or volute openings are fully or partially clogged. Remove pump and clean.
Motor runs for a short time,
then stops.
• Inlet holes in pump base are clogged. Remove pump and clean the openings.
• Pump impeller is partially clogged with tar or paint, causing motor to run slow and overload.
Remove pump and clean.
• Motor stator may be defective.
• Impeller or volute openings are fully or partially clogged. Remove pump and clean.
NOTES:
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