Hydromatic S3SD, Manual, Page: 7 / 20

7
Below is a list of common
prob lems and the probable causes:
Pump will not start:
1. No power to the mo tor. Check
for blown fuse or tripped circuit.
2. Hand-Off-Auto switch may be
in the Off po si tion.
3. Control circuit trans form er
fuse may be blown.
4. Overload relay on start er may
be tripped. Push to reset.
Pump will not start and
over load heaters trip:
1. Turn off power and check
motor leads with Megger or
ohmmeter for pos si ble ground.
2. Check resistance of motor
wind ings. All 3 phases should
show close to the same read ing.
3. If no grounds exist and the
motor wind ings check OK,
remove pump from sump
and check for clogged or
blocked impeller.
Pump operates with se lec tor
switch in Hand position but will
not operate in Auto position:
1. This indicates trouble in
the float lev el control or the
alternator re lay.
2. To check for defective float
con trol, put selector switch in
Auto po si tion and turn off main
power. Put a jump er wire on
terminal strip. Turn on power
and if pump starts, trouble is in
float con trol. Replace control.
Pump
Troubleshooting
Pump runs but will not shut off:
1. Pump may be air locked.
Turn pump off and let set for
several min utes, then restart.
2. Lower float control may be
hung-up in the closed po si-
tion. Check in sump to be sure
control is free.
3. Selector switch may be in the
Hand position.
Pump does not deliver prop er
capacity:
1. Discharge gate valve may be
par tial ly closed or par tial ly
clogged.
2. Check valve may be partially
clogged. Raise level up and
down to clear.
3. Pump may be running in
wrong di rec tion. Low speed
pumps can op er ate in re verse
direction with out much noise
or vibration.
4. Discharge head may be too
high. Check total head with
gauge when pump is op er at ing.
Total head is dis charge gauge
pressure con vert ed to feet plus
vertical height from water
level in sump to center line of
pres sure gauge installed in
dis charge line. gauge should
be in stalled on pump side
of all valves. Multiply gauge
pres sure in pounds by 2.31 to
get head in feet.
5. If pump has been in service for
some time and capacity falls
off, re move pump and check
for wear or clogged impeller.