Product Manual

©Copyright 2018 Liberty Pumps Inc. All rights reserved 10
7. Troubleshooting
Problem Cause Correcon
Pump will not run.
 Blown fuse or other interrupon of
power; improper voltage.
 Check that the unit is securely plugged in. Have
an electrician check all wiring for proper
connecons and adequate voltage and capacity.
 Switch is unable to move to the “turn
on” posion due to interference with
the side of basin or other obstrucon
 Position the pump or switch so that it has
adequate clearance for free operation.
 Insufficient liquid level.
 Make sure the liquid level is allowed to rise
enough to activate switch(s).
 Defecve switch.
 Remove and replace switch.
Pump will not turn
off.
 Switch(s) unable to move to the
“turn off” position due to
interference with the side of basin
or other obstacle.
 Position the pump or switch so that it has
adequate clearance for free operation.
 Defective switch.  Remove and replace 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
backwards.
 Remove check valve(s) and examine for freedom
of operaon and proper installaon.
 Gate or ball valve is closed.  Open gate or ball valve.
 Total li is beyond pump's capability.
 Try to route piping to a lower level. If not
possible, a larger pump may be required.
Consult the factory.
 Pump impeller is jammed or volute
casing is plugged.
 *Remove the pump from the basin. Detach
the pump base and clean the area around
the impeller. Reassemble and reinstall.
Pump runs
periodically when
fixtures are not in
use.
 Check valve was not installed, is stuck
open or is leaking.
 Remove check valve(s) and examine for freedom
of operaon and proper installaon.
 Fixtures are leaking.
 Repair fixtures as required to eliminate
leakage.
Pump operates
noisily.
 Foreign objects in the impeller
cavity.
 *Remove the pump from the basin. Detach
the pump base and clean the area around
the impeller. Reassemble and reinstall.
 Broken impeller.
 Consult the factory for information regarding
replacement of impeller.
 Worn bearings.
 Return pump to the factory or authorized
repair station for repair.
 Piping attachments to building are
too rigid.
 Replace a portion of the discharge line with
rubber hose or connector.