4617000L
Copyright © Liberty Pumps, Inc. 2019 All rights reserved.
7 | EN
Float Switch Adjustment
Refer to the diagram to adjust the float
switch. The pump should engage at a
waste depth of approximately 4” and
pump down to around 3”.
To adjust the float switch, remove the
switch access cover and lift the float
switch out of the tank. After adjusting
to the lengths shown, replace the
switch by placing the cord between the
two bosses. Reattach the access cover
to the tank.
Troubleshooting
No repair work shall be carried out during the warranty period
without prior factory approval. To do so may void the warranty.
Liberty Pumps, Inc. assumes no responsibility for damage or injury
due to disassembly in the field. Disassembly, other than at Liberty
Pumps or its authorized service centers, automatically voids
warranty.
Problems and improper operation of the water closet should be
directed to the manufacturer of the water closet and their
installation instructions and troubleshooting guidelines.
1/8”
3-1/2”
3/8”
3-1/8”
Table 1. Troubleshooting Matrix
Problem
Possible Cause
Corrective Action
Pump does not start.
Tripped circuit breaker, tripped GFCI, blown fuse,
or other interruption of power.
Reset tripped circuit breaker, reset GFCI, replace blown
fuse with properly sized fuse, check that the unit is
securely plugged in, investigate power interruption.
Switch unable to move to the PUMP ON position
due to interference in basin or other obstruction.
Position the pump or float switch so that it has adequate
clearance for free movement.
Insufficient liquid level.
Verify the liquid level is allowed to rise enough to
activate the float switch.
Defective float switch.
Replace float switch.
Obstructed impeller or volute.
Remove obstruction.
Pump runs, but does
not turn off.
Switch unable to move to the PUMP OFF
position due to interference with the side of
basin or other obstruction.
Position the pump or float switch so that it has adequate
clearance for free movement.
Defective float switch.
Replace float switch.
Pump runs or hums, but
does not pump.
Discharge is blocked or restricted.
Check the discharge line for foreign material, including
ice if the discharge line passes through or into cold areas.
Check valve is stuck closed or installed backward. Remove check valve(s) and examine for freedom of
operation and proper installation.
Gate or ball valve is closed.
Open gate or ball valve.
Total head (lift height) is beyond pump's
capability.
Route piping to a lower level. If not possible, a larger
pump may be required. Consult Liberty Pumps.
Obstructed impeller or volute.
Remove obstruction.
Pump cycles too
frequently.
Check valve not installed, stuck open, or leaking. Install check valve(s); remove check valve and examine
for freedom of operation and proper installation.
Pump runs periodically
when fixtures are not in
use.
Check valve not installed, stuck open, or leaking. Install check valve(s); remove check valve and examine
for freedom of operation and proper installation.
Fixtures are leaking.
Repair fixtures as required to eliminate leakage.
