Tr oubles hoot ing
Pump Troubleshooting
Symptom
Pump will not run. Check all wiring connections.
Check for low or defective battery.
Confirm that the automatic switch is free to
move up and down.
Verify back-up switch is working properly.
Check for a blown fuse in the terminal
block.
Pump cycles too
Improper float switch setting. Adjust
frequently.
distance between rubber stoppers on float
rod to achieve desired pump cycle.
Main check valve located between
discharge of primary pump and the
back-up sump pump tee is not installed or
is not working properly. Check all valves.
Install or repair as required.
Motor hums but
Check for low or defective battery.
pump will not run.
Pump runs but
Make sure a check valve is installed and
pumps very little
functioning between the primary pump
or no water.
discharge and the back-up sump pump tee.
Check all valves. Install or repair as
required.
Check for obstruction in discharge pipe.
Discharge pipe length and/or height
exceeds capacity of pump. See Table 1 for
pump capacity.
Check for low or defective battery.
Positive (+) and negative (–) battery wires
are reversed.
Ensure pump is not airlocked by orienting it
at a 45° angle (Method C only).
4414000D
Suggested Solution
Copyright © Liberty Pumps, Inc. 2019 All rights reserved.
Charger Troubleshooting
Symptom/ LED
Indication
Charger
No LEDs
No AC power.
does not
ON
work
Charger
Fault
Reverse
has no DC
ON
polarity
output
connection to
battery.
No
Fault
Battery is
charging
flashing
severely
current
sulfated or
cannot hold a
charge.
Battery has a
damaged cell.
Full/
Battery is
Float
severely
flashing
sulfated.
Possible
Suggested Solution
Causes
Check AC
connections and
make sure power is
switched ON.
Check that the spade
terminals haven't
fallen off the battery.
Check that the spade
terminals are
connected to the
correct polarity.
Replace battery.
Battery cannot be
charged and must be
replaced.
Check the battery
condition, age, etc.
Battery may need
replacement.
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