Pump runs and pumps out
sump but does not stop.
1. Float is stuck in up position.
Be sure float is not hung up
and operates freely in basin.
2. Switch contacts may be stuck;
replace switch.
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 24' vertical lift.
Horizontal distance does not
affect pumping, except loss
due to friction through
discharge pipe.
3. Inlet in pump base may be
clogged. Remove pump and
clean out openings.
4. Impeller or volute openings
may be plugged or partially
plugged. Remove pump and
clean out.
5. Pump impeller may be
partially clogged causing
motor to run slow, resulting
in motor overload. Clear
impeller.
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 out.
3. Pump impeller may be
partially clogged causing
motor to run slow, resulting
in motor overload. Clear
impeller.
4. Fuse size or circuit breaker is
too small.
4
5. Defective motor stator; return
to authorized Hydromatic
service center for verification.
Motor runs for short time
then stops. Then after short
period starts again. Indicates
tripping overload caused by
symptom shown.
1. Inlet in pump base may be
clogged. Remove pump and
clean out openings.
SHEF30 Performance Curve
2. Impeller or volute openings
may be plugged or partially
plugged. Remove pump and
clean out.
3. Pump impeller may be
partially clogged causing
motor to run slow,
resulting in motor overload.
Clear impeller.
4. Defective motor stator: return
to authorized Hydromatic
service center.
