5-47
Accessory Troubleshooting
TP-5672 11/95
Battery Charger
Option DD-24 is an automatic adjustable float battery
charger. Thebattery charger is mountedbelowthemain
circuit board on the enclosure door.
Theautomaticbatterychargerisdesignedtochargeand
maintainlead-acidandnickel-cadmiumautomotive-type
batteries in a fully charged state without manual
intervention. The charger output provided by the power
transformeriscontrolledbythecircuitboard.Thecontrol
board provides the charger with current-limiting, ACline
compensation, reverse-polarity protection, ambient-
temperature compensation, and constant voltage
charging mode. The control circuit board continuously
monitors the battery and load conditions to maintainthe
battery’s proper charge. Refer to Figure 5-53 for
component identification. The chargers are factory
adjusted to maintain the battery at the proper float
voltages. The 12-volt charger will maintain a lead-acid
(6-cell) battery without adjustment. The 24-volt charger
will maintain a lead-acid (12-cell) battery without
adjustment. Refer to Figure 5-54 through Figure 5-58
for wiringdiagrams. See Figure 5-59 for battery charger
connection. and Figure 5-60 for the troubleshooting
table.
Sulfuric acid in batteries.
Can cause severe injury or death.
Use protective goggles and clothes. Battery acidcan
causepermanent damage toeyes, burnskin, andeat
holes in clothing.
WARNING
Sulfuric acid in batteries can cause severe injury or
death. Sulfuric acid in battery can cause permanent
damage to eyes, burn skin, and eat holes in clothing.
Always wear splash-proof safety goggles whenworking
around the battery. If battery electrolyte is splashed in
the eyes or on skin, immediately flush the affected area
for 15minutes withlargequantitiesofcleanwater. Seek
immediatemedicalaidinthecaseof eyecontact. Never
addacidto a batteryoncethebattery hasbeenplacedin
service. This may result in hazardous spattering of
electrolyte.
A-294226-A P1
294241-B
GRD
POWER
ON
AC + --
VOLT.
ADJ.
AC
AC INPUT
120V 50/60HZ .68A
DC OUTPUT
12V 2A
DC
OUTPUT
6A
AC
INPUT
1A
321
DC AMPERES
0
1
2 3 4
5
678
1. DC Ammeter
2. DC Output Fuse
3. “Power On” Lamp
4. Transformer
5. Main Circuit Board Assembly
6. AC Input Fuse
7. Terminal Block
8. Ground Terminal (AC)
Figure 5-53. Battery Charger Components