Liberty Pumps XFL70 Serie Manuel D'installation page 9

Maintenance and Troubleshooting
RISK OF ELECTRIC SHOCK
 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.
 All electrical and motor repairs and service must be
performed by a repair facility approved by Liberty Pumps and
certified to work on explosion-proof motor enclosures.
RISK OF FIRE
 Use only non-sparking tools and components in and around
basins, open covers and vents. Do not use electronic devices
that are not rated for use in hazardous locations or have live,
exposed electrical circuits in or around basins, open covers
and vents. Sewage and effluent systems produce and may
contain flammable and explosive gases and sparks could
ignite these gases.
RISK OF SERIOUS INJURY OR DEATH
 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 proper 3-phase pump rotation before retuning to
service.
Problem
Damaged power or control cord.
Control panel selector switch in Off position.
Blown control circuit transformer fuse.
Tripped circuit breaker, blown fuse, or other
interruption of power.
Improper voltage.
Pump does not start. Switch unable to move to the PUMP ON position
due to interference in basin or other obstruction.
Insufficient liquid level.
Defective float switch.
Obstructed impeller or volute.
Loose wiring connections.
Thermal overload tripped.
3472000B
Maintenance
Pump should be checked quarterly for corrosion and wear. As the
motor is oil-filled, no lubrication or other maintenance is required.
Some pumps have an air bleed hole to help prevent air lock. A
small spray of water from this hole is normal while pump is
running.
In the event the pump becomes clogged, the inlet screen can be
removed to gain access to the pump impeller. Once the
obstruction is removed, the anti-air lock hole should be cleaned.
Field Service on Hazardous Location Pumps
The power and control cord are not field replaceable. If either cord
is compromised, the entire pump must be brought to an
authorized hazardous motor enclosure repair facility approved by
Liberty Pumps.
The only allowable repair/replacement without compromising the
hazardous location rating of the pump is the lower shaft seal. A
certified repair shop should perform this task since they have the
capability to clean and flush the mid oil chamber.
Otherwise, the pump must be returned to Liberty Pumps or an
authorized hazardous repair facility for electrical and motor
service. This will ensure the integrity of the hazardous location
rating of the pump and comply with Liberty Pumps warranty
requirements.
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 an
authorized hazardous motor enclosure repair facility approved by
Liberty Pumps or its authorized service centers, automatically
voids warranty.
Table 2. Troubleshooting Matrix
Possible Cause
Copyright © Liberty Pumps, Inc. 2019 All rights reserved.
Corrective Action
Return pump to an authorized repair facility.
Set selector switch to Hand or Auto position.
Replace fuse.
Reset tripped circuit breaker; replace blown fuse with
properly sized fuse; investigate power interruption.
Have an electrician check all wiring for proper
connections and adequate voltage and capacity.
Position the pump or float switch so that it has adequate
clearance for free movement.
Verify the liquid level is allowed to rise enough to
activate switch(es).
Replace float switch.
Remove obstruction.
Check and tighten all connections.
Wait for pump to cool to operating temperature.
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