Liberty Pumps 441 - Manual (Page 11)

OPERATION / TROUBLESHOOTING cont.
BATTERY REQUIREMENTS
Hazardous electrical current. Can cause severe burns and start a fire
if battery terminals are short circuited. Install the battery in a battery box (See Key No. 8,
Page 12). To prevent accidental shorting across battery terminals, strap cover securely
(See Figure 11) on the battery box. Do not leave battery uncovered. Do not allow children
to play around the battery backup system installation. Your backup sump pump depends
on the battery used with it for power. The better the battery, the better the performance of
the pump. We recommend the use of a size 27M or a size 24M Marine Deep Cycle
Battery. They will perform as indicated in Table IV, on Page 11, and will stand up well to
long periods of little or no use.
Figure 10 – Battery
Hold-down Strap
Threading
NOTICE: A 24M battery will provide the same performance as a 27M battery, but for a
shorter length of time.
Use of a standard automobile battery, GEL type, or a Maintenance Free (sealed) battery with this charger is not
recommended. An automobile battery may require charging after only 1-2 hours of continuous use, and the
repeated charging cycles may cause early plate failure in the battery. GEL-type batteries require a lower voltage than
the charger is designed for; they may overcharge. Maintenance-free (sealed) batteries require a higher voltage; they
may never reach full charge.
Use only the recommended battery or one of the same type and size so it will fit in the battery box (maximum size 12-
5/8" long, 7" wide and 9-3/8" high [320.7mm x 177.8mm x 238mm] including terminals) and supply enough voltage for
full performance.
BATTERY MAINTENANCE
Severe burn hazard. A filled battery contains sulfuric acid. Avoid contact with skin, eyes or clothing.
NOTICE: To protect battery case from chipping and gouging, do not let the battery box sit on a concrete floor. Install
the battery box on a shelf or a protective pad (plywood, 2x4s, etc.). Always install the battery box in a dry location that
is protected from flooding.
Follow the battery manufacturer’s recommendations for maintenance and safe use of battery.
TROUBLESHOOTING
Pump won’t run.
1. Check all wiring connections.
2. Check for low or defective battery.
3. Confirm that the automatic switch is free to swing up and down.
4. Check for a blown fuse in the junction box.
Motor hums but pump won’t run:
1. Check for low or defective battery.
Pump runs but pumps very little or no water:
1. Make sure a check valve is installed and functioning between primary pump discharge and Backup Sump Pump
tee.
2. Check for obstruction in discharge pipe.
3. Discharge pipe length and/or height exceeds capacity of pump. See Table IV, Page 10, for pump capacity.
4. Check for low or defective battery.
5. Positive (+) and negative (–) wires are reversed.
Pump cycles too frequently:
1. Improper float switch setting. Adjust distance between rubber stoppers on float rod to achieve desired pump
cycle.
2. Main check valve located between discharge of primary pump and the Backup Sump Pump tee is not installed
or is not working properly. Install or repair as required.
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