Troubleshooting - Little Giant EC-1-DV Series Owner's Manual

Troubleshooting

Problem
Pump is not connected to elec-
trical power
Circuit breaker off or fuse
removed
Pump does not start
Accumulation of debris or
when tank is full of
build-up on float
condensate water
Float movement obstruction
Defective switch
Defective motor
Pump is not connected to elec-
trical power
Liquid inflow matches or
exceeds pump output capacity
Condensate is over-
Pump is not level
flowing from the tank
Accumulation of debris or
build-up on float
Check valve stuck or plugged
Outlet flow is blocked
Defective switch
Defective motor
Float movement obstruction
Pump will not shut off Liquid inflow matches or
exceeds pump output capacity
Defective switch
Check valve stuck or plugged
Pump runs but does Lift too high for pump
not discharge liquid
Outlet flow is obstructed
Check valve stuck or plugged
Pump does not deliver
Lift too high for pump
rated capacity
Low voltage, speed too slow
Pump cycles continu- Discharge tubing improperly
ally located or reservoir is further
than 3 ft from the pump
Probable Causes Corrective Action
Connect pump to a dedicated GFCI circuit.
Turn on circuit breaker or replace fuse.
Clean float; a dirty float could be too heavy to operate correctly.
Remove the tank. Check float movement path. Remove any debris or
obstruction.
Replace pump.
Replace pump.
Connect pump to a dedicated GFCI circuit.
Larger pump required.
The high level switch should shut off the A/C unit or signal an alarm in this
condition if connected in the circuit correctly. Check to ensure that the pump
high level switch is connected to the A/C unit (or alarm circuit), and that the
leads are connected to the correct switch terminals for the application. Refer
to "High Water Level Switch Connection" on page
Check to ensure that the pump is level. If the pump is not level, it may not
activate, causing water to overflow from the tank. Place unit on a flat and
level surface.
Clean float. A dirty float could be too heavy to operate correctly.
Remove check valve and inspect for proper operation.
Check outlet tubing to ensure that it is not kinked or blocked. Clear blocked
tubing of slime and debris. Clean inlet and outlet piping.
Replace pump.
Replace pump.
Remove the tank. Check float movement path. Remove any debris or
obstruction.
Larger pump required.
The high level switch should shut off the A/C unit or signal an alarm in this
condition if connected in the circuit correctly. Check to ensure that the pump
high level switch is connected to the A/C unit (or alarm circuit), and that the
leads are connected to the correct switch terminals for the application. Refer
to "High Water Level Switch Connection" on page
Replace pump.
Remove check valve and inspect for proper operation.
Check rated pump performance.
Check outlet tubing to ensure that it is not kinked or blocked. Clear blocked
tubing of slime and debris. Clean inlet and outlet piping.
Remove check valve and inspect for proper operation.
Check rated pump performance.
Check that supply voltage matches nameplate rating.
Perform proper installation. Refer to
MAINTENANCE
Troubleshooting
9.
9.
"Installation" on page 4.
11