Installation Sheet

10 | EN Copyright © Liberty Pumps, Inc. 2019 All rights reserved. 7034000M
Maintenance
Check pump frequently for debris and/or build up that may
interfere with pump or float switch operation. As the motor is
oil-filled, no lubrication or other maintenance is required.
In the event the pump becomes clogged, the inlet screen can be
removed to gain access to the pump impeller. Once the
obstruction is removed, the anti-airlock hole should be cleaned.
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 an
authorized repair facility approved by Liberty Pumps or its
authorized service centers, automatically voids warranty.
Table 2. Troubleshooting Matrix
Problem Possible Cause Corrective Action
Pump does not start.
Damaged power or control cord. Replace as needed.
Control panel selector switch in OFF position. Set selector switch to Hand or Auto position.
Blown control circuit transformer fuse. Replace fuse.
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.
Improper voltage.
Have an electrician check all wiring for proper
connections and adequate voltage and capacity.
Float switch unable to move to PUMP ON
position due to interference in basin or other
obstruction.
Position pump or float switch so that it has adequate
clearance for free movement.
Insufficient liquid level.
Verify liquid level is allowed to rise enough to activate
float switch(es).
Defective float switch. Replace float switch.
Obstructed impeller or volute. Remove obstruction.
Loose wiring connections. Check and tighten all connections.
Pump runs, but does
not turn off.
Pump is airlocked.
Turn pump off and let set for several minutes, then restart.
Control panel selector switch in Hand position. Set selector switch to Auto position.
Float switch unable to move to PUMP OFF
position due to interference with the side of
basin or other obstruction.
Position pump or float switch(es) so that it has adequate
clearance for free movement.
Control panel failure. Check control panel.
Defective float switch. Replace float switch.
Pump runs or hums, but
does not pump.
Discharge line blocked or restricted.
Check discharge line for foreign material, including ice if
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 is airlocked.
Turn pump off and let set for several minutes, then restart.
Add baffle to reduce trapped air bubbles.