Little Giant LG-SCSA Series Owner's Manual page 9

TROUBLESHOOTING
Problem
Pump not plugged in.
Circuit breaker shut-off or fuse removed.
Accumulation of trash on float.
Pump does not turn on
Float obstruction.
Defective switch.
Defective motor.
Float or float rod obstruction.
Pump is air locked.
Pump will not shut off
Liquid inflow matches pump capacity.
Defective switch.
Check valve installed backwards.
Check valve stuck or plugged.
Pump runs but does not
Lift too high for pump.
discharge liquid
Inlet to impeller plugged.
Pump is air locked.
Lift too high for pump.
Low voltage, speed too slow.
Pump does not deliver
rated capacity
Impeller or discharge pipe is clogged.
Impeller wear due to abrasives.
No check valve in long discharge pipe, allowing liquid
to drain back into basin.
Pump cycles continually
Check valve leaking.
Basin too small for inflow.
Water sprays out of a This pump comes with a bleed hole that allows trapped
hole by a bolt on the air to escape from the pump, preventing air lock. Water
base of the unit. spraying out of this hole is completely normal.
Probable Causes 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.
Pull pump and clean.
Larger pump required.
Replace switch.
Check flow-indicating arrow on check valve body to ensure it is installed properly.
Remove check valve and inspect for proper operation.
Check rated pump performance.
Pull pump and clean.
Pull pump and clean.
Check rated pump performance.
Check for proper supply voltage to make certain it corresponds to nameplate voltage.
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.
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