If amp readings are higher than listed, it indicates voltage may be higher or lower than normal or that pump
grinder may be clogged with trash causing extra load on motor.
CHECK LIST IF PUMP DOES NOT OPERATE PROPERLY
CHECKING FOR MOISTURE IN MOTOR
– Use ohmmeter and set on highest scale. Readings on the large
power cord between any of the conductors red, black, white to green conductor or motor shell should be more than
500,000 ohms. Motor probably will run with a lower reading, but if pump is out of service and reading is below
500,000 ohms the motor housing and stator should be removed and baked in a drying oven at 220°F. To be
serviced only at authorized service station.
Readings should be taken with line leads disconnected from terminal strip.
RESISTANCE OF WINDINGS
– Every motor winding has a fixed resistance and winding must check close to
the values given below to operate properly. This winding resistance also shows if motor is connected for voltage
being used.
Use ohmmeter for this test and set on scale to read directly in ohms.
TROUBLE CHECK LIST
Troubles listed are generally caused by the
pump. Other troubles can occur form a faulty control box. These will
be listed with the control box instruction.
CONDITION
PROBABLE CAUSE
Pump runs but does not pump liquid
1. Pump impeller may be air locked, this occasionally occurs
from basin.
on a new installation. Start and stop pump several times
to purge air.
2.
Run additional water into basin so that pump will be submerged deeper
to clear water.
3.
If pump is three phase, rotation may be wrong.
4.
If air does not clear it may be necessary to lift pump out of sealing elbow
and start motor to allow pump to pump for a few seconds.
Air vent hole is provided in pump case, so some water will flow from
this hole when pump is operating. If vent hole gets clogged, clean out.
5.
If pump has been installed for some time and does not pump, it may be
clogged at the grinder inlet.
6.
Discharge gate valve may be closed.
7.
Discharge check valve may be clogged or have a broken clapper.
8.
Discharge head may be too high. Check elevation.
9.
If above checks do not locate trouble, motor rotor may be loose on shaft
which allows motor to run but will not run impeller or only at low RPM.
Red light comes on at control box.
This indicates some water has leaked past the lower seal and has entered
the seal chamber and made contact with the electrode probe. Pump must
be removed from basin within approximately two (2) weeks for
replacement of lower seal. This preventive repair will save the motor.
Overload trips at control box and
1. Push in on red reset button to reset overload. If overload trips
alarm buzzer or flashing red light
again after short run, pump has some damage and must
comes on due to high water level
be removed from basin for checking.
in basin.
2. Trouble may be from clogged grinder causing motor to
overload or could be from a failed motor.
3. Trouble may be from faulty component in control box.
Always check the control box before removing the pump.
