MAINTENANCE
Troubleshooting
Franklin Electric Co., Inc.
| Oklahoma City, OK 73157-2010
littlegiant.com
Form 998124 Rev. 002 04/20
Copyright © 2020, Franklin Electric, Co., Inc. All rights reserved.
Troubleshooting
Problem
Probable Causes
Corrective Action
Pump does not start
when tank is full of
condensate water.
Pump is not connected to elec
-
trical power.
Connect pump to a dedicated GFCI circuit.
Circuit breaker off or fuse
removed.
Turn on circuit breaker or replace fuse.
Accumulation of debris or
build-up on float.
Clean float; a dirty float could be too heavy to operate correctly.
Float movement obstruction.
Remove the tank. Check float movement path. Remove any debris or
obstruction.
Defective switch.
Replace pump.
Defective motor.
Replace pump.
Condensate is over
-
flowing from the tank.
Pump is not connected to elec
-
trical power.
Connect pump to a dedicated GFCI circuit.
Liquid inflow matches or
exceeds pump output capacity.
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 4
.
Pump is not level.
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.
Accumulation of debris or
build-up on float.
Clean float. A dirty float could be too heavy to operate correctly.
Check valve stuck or plugged
Remove check valve and inspect for proper operation.
Outlet flow is blocked.
Check outlet tubing to ensure that it is not kinked or blocked. Clear blocked
tubing of slime and debris. Clean inlet and outlet piping.
Pump impeller is not turning.
Clear any blockage in the impeller housing.
Defective switch.
Replace pump.
Defective motor.
Replace pump.
Pump will not shut off.
Float movement obstruction.
Remove the tank. Check float movement path. Remove any debris or
obstruction.
Liquid inflow matches or
exceeds pump output capacity.
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 4
.
Defective switch.
Replace pump.
Pump runs but does
not discharge liquid.
Check valve stuck or plugged. Remove check valve and inspect for proper operation.
Lift too high for pump.
Check rated pump performance.
Inlet to impeller plugged.
Pull pump and clean.
Outlet flow is obstructed.
Check outlet tubing to ensure that it is not kinked or blocked. Clear blocked
tubing of slime and debris. Clean inlet and outlet piping.
Pump does not deliver
rated capacity.
Check valve stuck or plugged. Remove check valve and inspect for proper operation.
Lift too high for pump.
Check rated pump performance.
Low voltage, speed too slow.
Check that supply voltage matches nameplate rating.
Impeller or discharge pipe is
clogged.
Pull pump and clean. Check pipe for scale or corrosion.
Pump cycles continu
-
ally.
Check valve leaking.
Remove check valve and inspect for proper operation.
