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• 6 •
5. Select the battery type and charge rate.
6. Press the START button to begin
charging immediately. If START button
is not pressed within ten minutes
after unit was rst powered up, and
the charger detects a battery that
is properly connected, the charging
process will automatically begin and
nish. Unit will automatically switch
between BOOST and CHARGE rates
as needed.
7. When charging is complete, or if you
are done using ENGINE START or
BOOST modes, press STOP button,
disconnect the charger from the
AC power, disconnect the clamp
attached to vehicle’s chassis, and
nally remove the clamp from battery
terminal.
8. A marine (boat) battery must be
removed and charged on shore.
CHARGE RATE
The charger will automatically adjust the
charging current, based on battery size,
in order to charge the battery completely,
efciently and safely.
BATTERY CHARGING TIMES
APPLICATION
BATTERY
SIZE
CHARGING TIME (Hours)
2A 6A 8A 10A
POWERSPORTS
6Ah 6
32 Ah 15
AUTOMOTIVE
300 CCA 12
1000 CCA 30
MARINE
50 Ah 15
105Ah 33
2
5
4
10
5
11
1.75
4.5
3.5
8.5
4.25
9.5
1.5
4
3
7
3.5
8
Times are based on a 50% discharged
battery and may change, depending on age
and condition of battery.
AUTOMATIC CHARGING MODE
When an Automatic Charge is performed,
the charger switches to the maintain mode
automatically after the battery is charged.
ABORTED CHARGE
If charging cannot be completed normally,
charging will abort. When charging aborts,
the charger’s output is shut off and the
BAD BATTERY
(red) LED will light. The
digital display will show an error code (see
Troubleshooting for a description of the
error codes). Do not continue attempting
to charge this battery. Have it checked or
replaced.
DESULFATION MODE
Desulfation could take 8 to 10 hours.
If desulfation fails, charging will abort and
the BAD BATTERY
(red) LED will light.
COMPLETION OF CHARGE
Charge completion is indicated by the
CHARGED/MAINTAINING (green) LED.
When lit, the charger has switched to the
maintain mode of operation.
MAINTAIN MODE
(FLOAT MODE MONITORING)
When the CHARGED/MAINTAINING
(green) LED is lit, the charger has
started maintain mode. In this mode, the
charger keeps the battery fully charged
by delivering a small current when
necessary. If the charger has to provide
its maximum maintain current for a
continuous 12 hour period, it will go into
abort mode (see Aborted Charge section).
This is usually caused by a drain on the
battery or the battery could be bad.
MAINTAINING A BATTERY
The SC1281 charges and maintains 6-volt
and 12-volt batteries.
NOTE: The maintain mode technology
allows you to safely charge and maintain
a healthy battery for extended periods
of time. However, problems with the
battery, electrical problems in the
vehicle, improper connections or other
unanticipated conditions could cause
excessive current draws. As such,
occasionally monitoring your battery and
the charging process is required.
USING THE ENGINE START FEATURE
Your battery charger can be used to jump
start your car if the battery is low. Follow
all safety instructions and precautions for
charging your battery. Wear complete eye
protection and protective clothing.
WARNING: Using the ENGINE START
feature WITHOUT a battery installed in
the vehicle could cause damage to the
vehicle’s electrical system.
NOTE: If you have charged the battery
and it still will not start your car, do not
use the Engine Start feature, or it could
damage the vehicle’s electrical system.
Have the battery checked.
1. With the charger unplugged from the
AC outlet, connect the charger to the
battery following the instructions given
in Follow These Steps When Battery
is Installed in Vehicle.
2. Connect the charger to a live grounded
120V AC outlet.
3. With the charger plugged in and
connected to the battery and chassis,
press the RATE SELECTION button
until the ENGINE START LED is lit,
and then press the START button.
4. Crank the engine until it starts or 3
seconds pass. If the engine does not
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