14.
Connect power cord wires to terminals in panel, or connect power source, and check pump running. Motor
should run smoothly and be free of vibration.
Pump does not run or hum.
1.
Line circuit breaker may be off, or fuse, if used, may be blown or loose.
2.
Water level in sump may be too low. Run in more water.
3.
Pump cord plug may not be making contact in receptacle.
4.
If pump is using the series cord plug, the two plugs may not be plugged tightly together.
5.
Float may be stuck. Be sure float operates freely in basin.
6.
If all symptoms check OK, motor winding may be open; take to service center for check.
Pump runs but does not deliver water.
1.
Check valve may be installed backward. Arrow in valve points in direction of flow.
2.
Discharge gate valve, if used, may be closed.
3.
Pump may be air locked. Start and stop several times by plugging and unplugging cord. Check vent hole in
pump case for plugging.
4.
Pump head may be too high. Pump cannot deliver water over (SPD50H) 50’ or (SPD100H) 64’ vertical. Pump
must be sized to operating conditions.
5.
Inlet in pump base may be clogged. Remove pump and clean out openings.
6.
Impeller or volute openings may be plugged or partially plugged. Remove pump and clean per maintenance
instructions.
Pump runs and pumps out sump but does not stop.
1.
Float is stuck in
up
position. Be sure float operates freely in basin. Diaphragm vent tube in power cord may be
blocked or bent. Clear obstruction.
Pump runs but delivers only small amount of water.
1.
Pump may be air locked. Start and stop several times by plugging and unplugging cord. Check vent hole in
pump case for plugging.
2.
Pump head may be too high. Pump cannot deliver water over (SPD50H) 50’ or (SPD100H) 64’ vertical.
Horizontal distance does not affect pumping, except loss due to friction.
3.
Inlet in pump base may be clogged. Remove pump and clean out openings.
4.
Impeller or volute openings may be plugged. Remove pump and clean.
5.
Pump impeller may be partially clogged causing motor to run slow, resulting in motor overload.
Fuse blows or circuit breaker trips when pump starts.
1.
Inlet in pump base may be clogged. Remove pump and clean out openings.
2.
Impeller or volute openings may be plugged or partially plugged. Remove pump and clean.
3.
Pump impeller may be partially clogged causing motor to run slow, resulting in motor overload.
4.
Fuse size or circuit breaker is too small.
5.
Defective motor stator: return to authorized Hydromatic service center.
Motor runs for short time, stops, the after short period starts again. Indicates overload caused by symptom
shown.
1.
Inlet in pump base may be clogged. Remove pump and clean out openings.
2.
Impeller or volute openings may be plugged or partially plugged. Remove pump and clean.
3.
Pump impeller may be partially clogged causing motor to run slow, resulting in motor overload.
4.
Defective motor stator, return to Hydromatic service center.
If symptom is not found on chart, call authorized Hydromatic distributor or repair center for assistance.
