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Idiomas disponibles
6.
Troubleshooting
Pump will not
turn on
Pump runs or
hums but does
not pump
Pump does not
turn off
Water is
present inside
motor housing
Low pumping
performance
Cause
Tripped circuit breaker
or other interruption of
power; improper
voltage.
Problem with control
panel
Defective float switch
Motor thermal overload
device has tripped
(single phase device
only)
Discharge is blocked or
restricted
Check valve is stuck
closed or installed
incorrectly
Pump is air-locked
Pump impeller is
jammed
Max. lift height (Head)
has been exceeded
(see Fig. E)
Defective float or build-
up on surroundings is
restricting free
movement of the float.
Control panel failure
Pump seals have been
compromised
Impeller wear
Pump is rotating in
reverse.
©Copyright 2014 Liberty Pumps Inc. All rights reserved
Have an electrician verify that the pump is wired
according to the installation instructions. Also check all
wiring for proper connections and adequate capacity.
Have an electrician verify that pump is connected to the
control panel correctly. If no problem is found, consult
Liberty Pumps or control panel manufacturer.
Verify the pump runs manually, without floats. If the pump
works, check that all floats are free to move. If a float has
debris build-up or is restricted by its surroundings, clean
and reinstall float properly. Otherwise consult Liberty
Pumps.
Disconnect the pump from its power source. Using a
multi-meter, verify that there is no continuity between the
hot and neutral motor leads. Once the pump cools, there
will be continuity, and the pump is safe to run. Otherwise
consult Liberty Pumps.
Check the discharge line for blockage or for ice if the line
passes through or into cold areas.
If check valve is present, remove and inspect for freedom
of operation and proper installation.
Remove the pump and inspect the anti-airlock hole.
Remove any debris or rust that may be blocking the hole.
Verify that the pump turn off level has not changed from
its factory specified setting.
With the pump de-energized, inspect bottom of pump for
foreign material blocking impeller. If no blockage is found,
try rotating the impeller by hand. If the impeller will not
rotate, consult Liberty Pumps for further instruction.
Attempt to re-route piping to a lower elevation. If this is
not possible, a larger pump may need to be installed.
Check that the float is free to move. If build-up restricts
float, clean and reinstall. Otherwise, consult Liberty
Pumps.
Have an electrician inspect/evaluate control panel.
Consult control panel manufacturer for further assistance.
Consult Liberty Pumps.
Consult Liberty Pumps for additional troubleshooting and
replacement parts.
THREE PHASE PUMPS: Place pump on ground and
inspect rotation while pump is operating. If rotation is
reversed, have an electrician interchange two of the
power leads in the control panel.
SINGLE PHASE PUMPS: Contact Liberty Pumps
immediately. Do not switch power leads or continue to
operate the pump.
Correction
11
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