Hydromatic S12L Series, Инструкция по установке и обслуживанию, Страница: 7 / 16

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15.Use Locktite on socket head
locking screw in end of shaft.
16.Before refilling chamber with
oil, air test as described above.
17.Refill both chambers with oil
as described above.
18.Always check all leads with
high voltage or with Megger
for grounds before operating
the pump.
Below is a list of common
problems and the probable causes:
Pump will not start.
1. No power to the motor. Check
for blown fuse or open
circuit breaker.
2. Selector switch may be in the
Off position.
3. Control circuit transformer
fuse may be blown.
4. Overload heater on starter may
be tripped. Push to reset.
Pump will not start and
overload heaters trip.
1. Turn off power and check
motor leads with Megger or
ohmmeter for possible ground.
2. Check resistance of motor
windings. All 3 phases should
show the same reading.
3. If no grounds exist and
the motor windings check
OK, remove pump from sump
and check for clogged or
blocked impeller.
Pump operates with selector
switch in Hand position but will
not operate in Auto position.
1. This indicates trouble in the
level control or the alternator
relay.
2. To check for defective control
put selector switch in Auto
position and turn off main
power. Put a jumper wire
between 2 and 3 on terminal
strip. Turn on power and
if pump starts, trouble is in
lower control. Replace control.
If pump does not start, turn off
power, remove jumper from 2
and 3 and put jumper wire
between 1 and 2 ter mi nals.
Turn on power and if pump
starts, trouble is in upper
control. Replace control.
If pump does not start, turn off
power and put jumper between
2 and 3 and 1 and 2 and turn on
power. If pump starts, both
lower and upper controls are
defective. If pump still does
not start, trouble is in the
alternating relay. Replace with
new relay.
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
control 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
direction without much noise
or vibration.
4. Discharge head may be too
high. Check total head
with gauge when pump is
operating. Total head is
discharge gauge pressure
converted to feet plus vertical
height from water level in
sump to center line of pressure
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 partially clogged
giving a sus tained overload
but not high enough to trip
overload heater switch.
2. Motor may be operating out of
liquid due to a failed level
control.
All Hydromatic
sub mers ible motors can
operate for extended periods
out of water without burning
up the winding, but the heat
sensors give motor prolonged
life by con trol ling winding
temperature.
3. Pump may be operating on
a short cycle due to sump
being too small or from water
returning to sump due to a
leaking check valve.
Pump
Troubleshooting