Operation / Troubleshooting
11
4. Green (bicolor) “charging” LED indicates:
Float charge stage. Battery terminal voltage is reduced
to a regulated voltage and battery is being maintained
at full charge.
5. Recycle charge stage:
The charger automatically initiates a charge cycle that
begins with the prequalification test stage. This occurs
once the battery has been in the float charge stage for
28 days.
Special Features:
• The chargers are equipped with reverse battery, short
circuit, and “run-away charge” protection.
• A built-in safety timer starts when the charger enters
the Constant Current/Constant Voltage Charge stage
(Yellow LED is continuously on). The DB10018T sys-
tem has a 150 hour safety timer and the DB20018T
system has a 25 hour safety timer.
• To reset the charger simply unplug it from the 120V
outlet for 10 seconds and then plug it back in.
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.
9, Page 12). To prevent accidental shorting across battery
terminals, strap cover securely (See Figure 13) on the bat-
tery box. Do not leave battery uncovered. Do not allow
children to play around the battery backup system installa-
tion.
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 Marine Deep Cycle Battery or a size 24M
Marine Deep Cycle Battery. They will perform as indicat-
ed in Table V, on Page 10, and will stand up well to long
periods of little or no use.
NOTICE:
The 24M battery will provide the same perfor-
mance as a 27M battery, but for a shorter length of time.
Use of a standard automobile 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.
The maximum allowable size of a battery is 12-5/8"
long, 7" wide and 9-3/8" high [320.7mm x 177.8mm x
238mm] including terminals) so it will fit in the battery
box.
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 battery sit on concrete floor. Install
battery on a shelf or protective pad (plywood, 2x4s, etc.).
Always install battery 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. Check that automatic switch is free to swing up and
down.
4. Check for a blown fuse in the junction box of the
DB10018T system or in the charger of the
DB20018T system.
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 capaci-
ty of pump. See Table V, Page 9, for pump capacity.
4. Check for low or defective battery.
5. Positive (+) and negative (–) wires are reversed.
Pump cycles too frequently:
1. Tether length too short on automatic float switch.
Make sure that tether is at least 2.5" (63.5mm); see
Figure 6, Page 6.
2. Main check valve located between discharge of pri-
mary pump and the Backup Sump Pump tee is not
installed or is not working properly. Install or repair
as required.
3340 1198
Figure 13 – Battery Hold-down Strap Threading
