Maintenance And Troubleshooting - Liberty Pumps XFL50 Serie Manuel D'installation

2. Maintenance and Troubleshooting

Risk of electric shock.
adjustments.
Problem
Pump will not run.
Pump will not turn off.
Pump runs or hums, but does
not pump.
Always disconnect the pump from the power source before handling or making
Cause
Tripped breaker or other interruption of

power; improper voltage.
Switch is unable to move to the "turn on"

position due to interference with the side
of basin or other obstruction.
Insufficient liquid level.

Defective switch.
 
Internal motor short.
 
Switch(s) unable to move to the "turn off"

position due to interference with the side
of basin or other obstacle.
Defective switch.
 
Stuck / Defective Motor contactor.

Discharge is blocked or restricted.

Check valve is stuck closed or installed

backwards.

Gate or ball valve is closed.

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Reset breaker by pushing completely down on

the handle then back to the on position.

Have an electrician check all wiring for proper

connections and adequate voltage and
capacity.
Position the pump or switch so that it has

adequate clearance for free operation.

Make sure the liquid level is allowed to rise


enough to activate switch(s).
Remove and replace switch.

Requires an authorized service center.

Position the pump or switch so that it has

adequate clearance for free operation.

Remove and replace switch.

Replace motor contactor in panel.
 
Check the discharge line for foreign material,

including ice if the discharge line passes

through or into cold areas.
 Remove check valve(s) and examine for
freedom of operation and proper installation.
 Open gate or ball valve.

Correction
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7
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