Troubleshooting - Little Giant 14S Series Owner's Manual

Troubleshooting

Problem
Pump does not turn
on
Pump will not shut off
Pump runs but does
not discharge liquid
Pump does not
deliver rated
capacity
Pump cycles
continuously
Water sprays out of a
hole in the discharge
pipe.
Probable Causes
Pump not plugged in
Circuit breaker off or fuse removed
Accumulation of trash on float
Float obstruction
Defective switch
Defective motor
Float or float rod obstruction
Pump is air locked
Liquid inflow matches pump capacity
Defective switch
Check valve installed backwards
Check valve stuck or plugged
Lift too high for pump
Inlet to impeller plugged
Pump is air locked
Lift too high for pump
Rotation incorrect
Low voltage, speed too slow
Impeller or discharge pipe is clogged
Impeller wear due to abrasives
No check valve in long discharge pipe allow-
ing liquid to drain back into basin
Check valve leaking
Basin too small for inflow
There should be a bleed hole in the discharge
pipe that allows trapped air to escape from
the pump, preventing air lock
Water spraying out of this hole is completely
normal
Corrective Action
Plug in pump.
Turn on circuit breaker or replace fuse.
Clean float.
Check float path and provide clearance.
Replace switch.
Replace pump.
Check float and float rod path and provide
clearance.
Remove pump and clean air bleed hole.
Larger pump required.
Replace switch.
Check flow indicating arrow on check valve
body to ensure proper installation.
Remove check valve and inspect for proper
operation.
Check rated pump performance.
Pull pump and clean.
Remove pump and clean air bleed hole.
Check rated pump performance.
Switch any two of the line wires.
Check that supply voltage matches the
nameplate rating.
Pull pump and clean. Check pipe for scale or
corrosion.
Replace pump.
Install a check valve in discharge line.
Inspect check valve for correct operation.
Install larger basin.
No corrective action is required.
MAINTENANCE
Troubleshooting
7