2399000D
Copyright © Liberty Pumps, Inc. 2020 All rights reserved.
9 | EN
Maintenance and Troubleshooting
Accidental contact with electrically live parts, items, fluid, or
water can cause serious injury or death.
Always disconnect pump(s) from power source(s) before
handling or making any adjustments to either the pump(s),
the pump system, or the control panel.
Wear adequate Personal Protective Equipment when working
on pumps or piping that have been exposed to wastewater.
Sump and sewage pumps often handle materials that can
transmit illness or disease upon contact with skin and other
tissues.
Do not enter a pump basin after it has been used. Sewage and
effluent can emit several gases that are poisonous.
Maintenance
Pump should be checked quarterly for corrosion and wear. As the
motor is oil-filled, no lubrication or other maintenance is required.
Pump is permanently lubricated and cooled by turbine oil. If
replacement oil is required, use 0.5 gallons ISO VG 10 turbine oil.
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.
RISK OF ELECTRIC SHOCK
RISK OF SERIOUS INJURY OR DEATH
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.
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.
Low line voltage.
Check voltage. If under 108 V, check wiring size.
Remove extension cord or use with heavier gauge.
Float switch is 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 float switch(es).
Defective float switch.
Replace float switch.
Obstructed impeller or volute.
Remove obstruction.
Loose wiring connections.
Check and tighten all connections.
Thermal overload tripped.
Wait for pump to cool to operating temperature.
Pump does not start
and overload heaters
trip.
Unintentional ground.
Turn off power and check motor leads for possible
ground.
Obstructed impeller or volute.
Remove obstruction.
