Schumacher PSC-12500A Proseries Owner's Manual page 6

NOTE: When charging a battery that is not marked, check the manual of the item which
uses the battery for the correct battery type. Make sure the battery complies with the
safety instructions in Section 2.4.
Charge Rate Button
Use the Charge Rate button to select the charge rate or engine starting setting you require.
• SMALL BATTERY – Provides a charge rate of up to 2A. Intended for charging small
batteries such as those commonly used in garden tractors, snowmobiles and motorcycles.
NOTE: The 2A rate is not to be used as a trickle charger for larger batteries.
• REGULAR BATTERY – Automatically switches between the 15A and 40A variable charge
rate or charges continuously at the 15A rate, depending on the battery. Use for charging
automotive, marine and deep-cycle batteries. Not intended for industrial applications.
• ENGINE START – Used for cranking an engine with a weak or run-down battery. Always
use in combination with a battery.
11. OPERATING INSTRUCTIONS
Charging
1. Connect the battery following the precautions listed in Sections 6 and 7.
2. Connect the AC power following the precautions listed in Section 8.
3. Select the appropriate settings for your battery.
NOTE: Pressing any button while charging will stop the charging process and the Digital
Display will read Off.
Battery Connection Indicator
If the charger does not detect a properly connected battery, the CONNECTED (yellow)
LED will not light until such a battery is detected. Charging will not begin while the
CONNECTED (yellow) LED is not on. When charging begins, the CHARGING (yellow)
LED will illuminate.
Automatic Charging Mode
When an Automatic Charge is performed, the charger switches to the Maintain Mode (see
below) automatically after the battery is charged. NOTE: The battery must have at least a
0.1 volt charge in order for the microprocessor to analyze and begin the charging process.
Aborted Charge
If charging can not be completed normally, charging will abort. When charging aborts, the
charger's output is shut off. The CONNECTED (yellow) LED will remain lit, and the Digital
Display will read bad bat. In that state, the charger ignores all buttons. To reset after an
aborted charge, either disconnect the battery or unplug the charger.
Desulfation Mode
If the battery is left discharged for an extended period of time, it could become sulfated
and not accept a normal charge. If the charger detects a sulfated battery, the charger will
switch to a special mode of operation designed for such batteries. Activation of the special
Desulfation Mode is indicated by the CHARGING (yellow) LED blinking. If successful,
normal charging will resume after the battery is desulfated. The CHARGING (yellow) LED
will then stop blinking and stay lit. Desulfation could take up to 10 hours. If desulfation
fails, charging will abort. The CONNECTED (yellow) LED will remain lit, and the Digital
Display will read bad bat.
Completion of Charge
Charge completion is indicated by the CHARGED (green) LED. When lit, the charger has
stopped charging and switched to the Maintain Mode of operation.
Maintain Mode
When the CHARGED (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 battery voltage drops below a preset level the charger will go back into
Charge Mode until the battery voltage returns to the full charge level, at which point the
charger will return to Maintain Mode. The voltage is maintained at a level determined by
the BATTERY TYPE selected.
NOTE: The charger automatically switches between Charge Mode and Maintain Mode as
necessary. The CHARGED (green) LED will cycle on when the battery is at full charge and
off when the voltage drops below a preset level and the charger goes into Charge Mode.
This cycle will continue, and the CHARGED (green) LED will stay on for longer periods of
time as the battery becomes more fully charged.
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