5647000M
Copyright © Liberty Pumps, Inc. 2021 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.
Verify correct 3-phase pump rotation before retuning to
service.
Maintenance
As the motor is oil-filled, no lubrication or other maintenance is
required. If replacement lubrication is required, use ISO VG 10
turbine oil. Use approximately 0.8 gallons to just cover the upper
bearing of the motor.
To keep the pump/pump system operating smoothly, perform the
following routine checks. Severe operating environments will
require more frequent checks. For any issues that are not
resolvable, contact Liberty Pumps for further assistance.
Monthly
1.
Pumps that are idle for more than a month in a dry basin
should have impellers manually operated through the breaker
panel monthly to lubricate the seals.
2.
Pumps that are idle in a wet basin must be removed.
Quarterly
1.
Check pump for corrosion and wear.
2.
Check for free and unobstructed float switch operation and
float switch condition.
3.
Inspect for proper check valve operation.
4.
For multiple pumps, check for balanced operating times.
Uneven times indicate a defective unit, float switch or control.
5.
Inspect the control panel for any presence of moisture in
enclosure, loose connections, and general component
condition.
Annually
1.
Inspect and clean basin. Replace any defective components.
Troubleshooting
Refer to Table 3 for help troubleshooting issues.
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 3. 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 the pump ON
position due to interference in basin or other
obstruction.
Position the pump or float switch so that switch 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.
