8
Pump
Troubleshooting
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.
Pump runs but delivers only
small amount of water.
1. Pump may be air locked. Start
and stop several times.
2. Pump head may be too high.
Pump cannot deliver water
over 100 ft. 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
partially plugged. Remove
pump and clean per
maintenance instructions.
5. Pump impeller may be partially
clogged causing motor to run
slow, resulting in motor
overload. Clear obstruction
from volute and 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 per
maintenance instructions.
3. Pump impeller may be partially
clogged causing motor to run
slow, resulting in motor
overload. Clear obstruction
from volute and impeller.
4. Fuse size or circuit breaker is
too small.
5. Defective motor stator: return
to Hydromatic service center
for verification of failure.
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.
2. Impeller or volute openings
may be plugged or partially
plugged. Remove pump and
clean per maintenance instructions.
3. Pump impeller may be partially
clogged causing motor to run
slow, resulting in motor
overload. Clear obstruction
from volute and impeller.
4. Defective motor stator: return
to Hydromatic service center
for verification of failure.
If symptom not found call
Hydromatic distributor or
repair center for assistance.
1
9
30
29
27
4
26
5
6
1Ø only
22
23
24
13
11
10
16
19
18
17
20
21
15
8
14
12
7
25
6
2
31
3
1"
Oil
Level
