User Manual

©Copyright 2009 Liberty Pumps Inc. All rights reserved 8
Risk of electric shock. Always disconnect the pump from the power source before handling or making
adjustments.
Problem Cause Correction
• Blown fuse or other interruption of
power; improper voltage.
• Check that the unit is securely plugged in.
Have an electrician check all wiring for proper
connections and adequate voltage and
capacity.
• Switch is unable to move to the
“turn on” position due to
interference with the side of basin
or other obstruction
• 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).
Pump will not run.
• Defective switch.
• Remove and replace switch.
• 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.
Pump will not turn
off.
• Defective switch. • Remove and replace switch.
• Check the discharge line for foreign material,
including ice if the discharge line passes
through or into cold areas.
• Discharge is blocked or restricted.
• Check valve is stuck closed or
installed backwards.
• 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 lift 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 runs or hums,
but does not pump.
• 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.
• Check valve was not installed, is
stuck open or is leaking.
• Remove check valve(s) and examine for
freedom of operation and proper installation.
Pump runs
periodically when
fixtures are not in
use.
• Fixtures are leaking.
• Repair fixtures as required to eliminate leakage.
•
∗
Remove the pump from the basin. Detach the
pump base and clean the area around the
impeller. Reassemble and reinstall.
• Foreign objects in the impeller
cavity.
• Consult the factory for information regarding
replacement of impeller.
• Broken impeller.
• Worn bearings.
• Return pump to the factory or authorized repair
station for repair.
Pump operates
noisily.
• Piping attachments to building are
too rigid.
• Replace a portion of the discharge line with
rubber hose or connector.
5. Maintenance and Troubleshooting