Schumacher SC1352 Owner's Manual page 10

6. If the engine fails to start, use the
Boost rate for 5 minutes before
attempting to crank the engine again.
7. After the engine starts, press the ON/
OFF switch to turn OFF, unplug the
AC power cord before disconnecting
the battery clamps from the vehicle.
NOTE: If the engine does turn over but
never starts, there is not a problem with
the starting system; there is a problem
somewhere else with the vehicle. STOP
cranking the engine until the other problem
has been diagnosed and corrected.
ENGINE STARTING NOTES
Cool Down – After cranking, the charger
enters a mandatory 3 minute (180 second)
cool down state. The digital display will
show COOL DOWN XXX SECONDS
REMAINING. It starts at 180 and counts
down to 0. After 3 minutes, the digital
display will change to READY. The
(yellow/orange) LED will then be lit.
USING THE BATTERY VOLTAGE TESTER
1. With the charger unplugged from the
AC outlet, connect the charger to the
battery, following the instructions given
in previous sections.
2. Plug the charger's AC power cord into
the AC outlet.
3. Set the ON/OFF switch to the 12V or
24V position. DO NOT choose a rate
with the Rate Selection button.
4. If necessary, press the
button until the correct type is indicated.
5. Read the voltage on the digital display.
Keep in mind that this reading is only a
battery voltage reading; a false surface
charge may mislead you. Compare the
reading to the following chart.
12V Battery 24V Battery
Voltage Voltage
Reading Reading
12.8 or more 25.6 or more
12.2 to 12.7 24.4 to 25.4
Less than 12.2 Less than 24.4
TESTER AND CHARGER
When first plugged in and the ON/OFF
switch set to the 12V or 24V position,
the unit operates only as a tester, not as
a charger. Selecting a charge rate and
pressing the START button activates the
battery charger and deactivates the tester.
Battery Type
Battery
Condition
Charged
Needs charging
Discharged
• 10 •
POWER-UP IDLE TIME LIMIT
If no button is pressed within 10 minutes
after the battery charger is first powered
up, the charger will automatically switch
from tester to charger if a battery is
connected. In that case, the charger will be
set to the Boost rate and Gel battery type.
TESTER WITHOUT TIME LIMIT
If either the Display Mode or
Battery Type button is pressed within the
first 10 minutes after the battery charger
is powered up, the unit will remain a
tester (not a charger) indefinitely, unless
a charge rate is selected and the START
button is pressed.
TESTING AFTER CHARGING
After the unit has been changed from tester
to charger (by selecting a charge rate and
pressing the START button), it remains a
charger. To change the battery charger back
to a tester, press the START button.
NOTE: The battery tester is only designed
to test batteries. Testing a device with
a rapidly changing voltage could yield
unexpected or inaccurate results.
USING THE ALTERNATOR
PERFORMANCE TESTER (12V only)
1. With the charger unplugged from the
AC outlet, connect the charger to the
battery, following the instructions given
in previous sections.
2. Plug the charger AC power cord into
the AC outlet.
3. Set the ON/OFF switch to the 12V
position. DO NOT choose a rate with
the Rate Selection button.
4. Start the vehicle, rev the engine at
2000 rpm for 30 seconds and turn
on the vehicle's headlights or other
accessories.
5. Read the alternator percentage on
the digital display. Readings below
0 (13.2 volts) will read LOW and
readings above 100% (14.6 volts) will
read HI . GH. If you get a HI . GH or LOW
reading, have the electrical system
checked by a qualified technician.
NOTE: Refer to your vehicle owner's
manual for appropriate voltage numbers
for your alternator.
FAN OPERATION
It is normal for the fan to start and stop when
maintaining a fully charged battery. The fan
does not run in Tester Mode. Keep the area
near the charger clear of obstructions, to
allow the fan to operate efficiently.