Pump operates with selector
switch in Hand position but will
not operate in Auto position.
1. This indicates trouble in
the float level control or the
alternator relay.
2.
Check control panel
for trouble.
Pump runs but will not shut off.
1. Pump may be air locked.
Turn pump off and let set for
several minutes, then restart.
2. Lower float control may be
hung-up in the closed position.
Check in sump to be sure
con trol is free.
3. Selector switch may be in the
Hand position.
Pump does not deliver
proper capacity.
1. Discharge gate valve may
be partially closed or
partially clogged.
2. Check valve may be partially
clogged. Raise level up and
down to clear.
3. Pump may be running in
wrong direction. Low speed
pumps can operate in reverse
di rec tion with out much noise
or vibration.
4. Discharge head may be
too high. Check total head
with gauge when pump
is operating. Total head is
dis
charge gauge pressure
converted to feet plus vertical
height from water level in
sump to center line of pres-
sure gauge in discharge
line. Gauge should be installed
on pump side of all valves.
Multiply gauge pressure in
pounds by 2.31 to get head
in feet.
5. If pump has been in service
for some time and capacity
falls off, remove pump
and check for wear or
clogged impeller.
Motor stops and then restarts
after short period but overload
heaters in starter do not trip.
1. This indicates heat sensors in
the motor are tripping due to
ex ces sive heat. Impeller may
be par tial ly clogged giving
a sustained overload but not
high enough to trip overload
heat er switch.
2. Motor may be operating out
of liquid due to a failed level
control.
3. Pump may be operating on
a short cycle due to sump
being too small or from water
re turn ing to sump due to a
leaking check valve.
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