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TROUBLESHOOTING
Troubles listed below are generally not caused by the pump. Other trouble can occur from faulty control box
operation. These will be listed with the control box instructions.
CONDITION
Pump runs but does not pump
liquid from basin.
Red light comes on at control
box
Overload trips and alarm
buzzer or flashing red light
comes on due to high water
level in basin
Yellow run light stays on
continuously
23833A596
TROUBLE CHECK LIST
1. Pump impeller may be air locked, this occasionally occurs on a new
installation. Remove pump and clean volute case weep hole and
reinstall pump allowing 2 to 3 minutes for air to weep from pump.
2. Remove pump and guides from wet well, and test in 5 gallon bucket
after checking weep hole again. If pump still does not pump, disas-
semble check valve and check to insure that check valve flapper has
not adhered to sealing face. This condition results from assembled
basin units setting in the sun before installation. NOTE: Check valve
bolts should have Loctite 242 or equivalent applied before reassembly
of check valves.
3. If pump will pump water from bucket, try in wet well again. If it still will
not pump, the following problems may exist:
a) Ball Valve - Gate Valve may be in off position.
b) Discharge piping obstructed
c) Valve at street or in main line may be off — redundant check valve
in backwards.
d) Tap at force main obstructed — hole not drilled through enough —
pipes pushed into tee too far.
4. If pump has been installed for some time an does not pump, it may be
clogged at grinder inlet.
5. Discharge head may be too high. Check elevation. Maximum pump
head at zero flow is 105 feet. See pump curve.
6. If above checks do not locate trouble, motor rotor may be loose on
shaft which allows motor to run but will not turn impeller or only at low
RPM.
1. 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 preventative repair will save an
expensive motor.
1. Push in red reset button to reset overload. If overload trips again after
short run, pump has some damage and must be removed from basin
for checking.
2. Trouble may be from clogged grinder causing motor to overload or
could be from failed motor.
3. Trouble may be from faulty component in control box. Always check
control box before removing pump.
1. Indicates H-O-A switch be in the hand position.
2. Level control switch may have failed causing pump to continue to
operate when water is below lower float.
3. Grinder assembly may be partially clogged causing pump to operate at
very reduced capacity.
4. Check valve may be clogged causing low pump flow. Gate valve or
street valve may be in off position.
5. Pump may be air locked.
17
PROBABLE CAUSE
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