14
POSSIBLE CAUSES
• 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.
• Check valve is installed backwards. Arrow on valve should point in
direction of flow.
• Discharge shut-off 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.
• Float is stuck in up position. Be sure float operates freely in basin.
• Defective float switch.
• 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 is fully or partially clogged. Remove
pump and clean.
• Pump impeller is partially clogged, 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.
• Inlet holes in pump base are clogged. Remove pump and clean
the openings.
• Pump impeller is partially clogged, 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.
PROBLEM
Pump does not run or
hums.
Pump runs but does not
deliver water.
Pump runs and pumps out
sump, but does not stop.
Pump runs but delivers
only a small
amount of water.
Fuse blows or circuit
breaker trips when
pump starts.
Motor runs for a short
time, then stops.
Troubleshooting Checklist
0204 HONDA WSP manual.qxd 3/24/2004 2:14 PM Page 16
