Troubleshooting - Little Giant 6 Serie Manuel Du Propriétaire

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 base of the unit.
Probable Causes
Pump not connected to electrical power. Connect pump to a dedicated circuit equipped with GFCI.
Circuit breaker off or fuse removed.
For models equipped with diaphragm
switch: Breather tube kinked, pinched or
blocked.
For models equipped with tethered float
switch: Accumulation of trash or build-
up on float.
For models equipped with tethered float
switch: Float obstruction.
Defective switch.
Defective motor.
Float obstruction.
Pump is air locked due to missing or
clogged air relief hole.
Liquid inflow matches pump capacity.
For models equipped with diaphragm
switch: Breather tube kinked, pinched or
blocked.
Defective switch.
Check valve installed backwards.
Check valve stuck or plugged.
Lift too high for pump.
Inlet to impeller plugged.
Pump is air locked due to missing or
clogged air relief hole.
Lift too high for pump.
Low voltage, speed too slow.
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.
Check valve leaking.
Basin too small for inflow.
This pump comes with a bleed hole that
allows trapped air to escape from the
pump, preventing air lock.
Water spraying out of this hole is com-
pletely normal.
Corrective Action
Turn on circuit breaker or replace fuse.
Confirm power cord is not kinked or pinched and confirm
that breather tube end opening is not blocked.
Clean float.
Check float path and provide clearance.
Replace switch.
Replace pump.
Check float path and provide clearance.
If missing, drill an air relief hole as described in
Installation" on page 6. If clogged, clean obstruction from
air relief.
Larger pump required.
Confirm power cord is not kinked or pinched and confirm
that breather tube end opening is not blocked.
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.
If missing, drill an air relief hole as described in INSTALLA-
TION. If clogged, clean obstruction from air relief hole.
Check rated pump performance.
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
"Physical
13