Schumacher SCI90 - Manual (Page 8)

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Cool Down – After cranking, the charger enters a mandatory 3 minute (180 second) cool
down state. The digital display indicates the remaining cool down time in seconds. It starts
at 180 and counts down to 0. After 3 minutes, the digital display will change from displaying
the countdown to displaying UG\. The CHARGING 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 sections 6 and 7.
2. Plug the charger AC power cord into the AC outlet, following the instructions given in
section 8.
3. If necessary, press the BATTERY TYPE button until the correct type is indicated.
4. Read the voltage on the digital display.
NOTE: After 10 minutes, the charger will automatically switch from tester to charger.
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charger. Selecting a charge rate activates the battery charger and deactivates the tester.
Pressing the CHARGE RATE button when the ENGINE START LED is lit (except during
the 180 second cool down) will shut off the charger and activate the tester.
Power-Up Idle Time Limit: If no button is pressed within 10 minutes after the battery
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battery is connected. In that case, the charger will be set to the start up default settings.
Testing After Charging: After the unit has been changed from tester to charger (by
selecting a charge rate), it remains a charger. To change the battery charger back to a
tester, press the CHARGE RATE button until all charge rate LEDs are off.
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
1. With the charger unplugged from the AC outlet, connect the charger to the battery
following the instructions given in Sections 6 and 7.
2. Plug the charger AC power cord into the AC outlet, following the instructions given in
section 8.
3. Start the vehicle, and turn on the vehicle’s headlights. Read the voltage on the digital
display. If you get a reading between 13.4 volts and 14.6 volts, the alternator is
working properly. If the reading is less than 13.4 volts or more than 14.6 volts, have the
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for the fan to start and stop when maintaining a fully charged battery. Keep the area near
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10. MAINTENANCE INSTRUCTIONS
10.1 After use and before performing maintenance, unplug and disconnect the battery charger
(see sections 5, 6 and 7).
10.2 Use a dry cloth to wipe all battery corrosion and other dirt or oil from the battery clips,
cords and the charger case.
10.3 Ensure that all of the charger components are in place and in good working condition, for
example, the plastic boots on the battery clips.
10.4 Servicing does not require opening the unit, as there are no user-serviceable parts.
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11. MOVING AND STORAGE INSTRUCTIONS
11.1 Store the charger unplugged, in an upright position. The cord will still conduct electricity
until it is unplugged from the outlet.
11.2 If the charger is moved around the shop or transported to another location, take care to
avoid/prevent damage to the cords, clips and charger. Failure to do so could result in
personal injury or property damage.