5
4. If pump is using the series cord
plug, the two plugs may not be
plugged tight 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 24' (
1
⁄
4
HP) 26' (
1
⁄
3
HP)
vertical. Horizontal distance
does not affect pumping,
except loss due to friction.
5. Inlet in pump base may be
clogged. Remove pump and
clean out openings.
6. Impeller or volute openings
may be plugged or be partially
plugged. Remove the 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.
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' (
1
⁄
4
HP) 26' (
1
⁄
3
HP)
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 or be
partially plugged. Remove
the pump and clean per
maintenance instructions.
5. Pump impeller may be
partially clogged causing the
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 be
partially plugged. Remove
the pump and clean per
maintenance instructions.
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.
5. Defective motor stator; return
to Hydromatic service center
for verification.
Motor runs for short time then
stops. Then after
a 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.
2. Impeller or volute openings
may be plugged or be
partially plugged. Remove
the pump and clean per
maintenance instructions.
3. Pump impeller may be
partially clogged causing the
motor to run slow, resulting
in motor overload. Clear
impeller.
4. Defective motor stator; return
to Hydromatic service center
for verification.
Your pump warranty is void…
If…
power cord has been cut or
spliced.
If…
pump has been used to pump
mud, cement, tar, abrasives or
chemicals.
If…
pump has been used for
pumping of hot water (above
120°F).
If…
pump has been dismantled by
other than authorized Hydromatic
service center or distributor.
