Operating Instructions - Schumacher Electric DSR104 Owner's Manual

Charger Modes
7.3
Automatic charging mode
When an automatic charge is performed, the charger switches to 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. The Bad Battery (red) LED will light, and the Charging (yellow/orange) LED will flash.
Do not continue attempting to charge this battery. Check the battery and replace, if necessary.
Desulfation Mode
Desulfation could take 8 to 10 hours. If desulfation fails, charging will abort. The Bad Battery (red) LED
will light, and the Charging (yellow/orange) LED will flash.
Completion of Charge
Charge completion is indicated by the Charged/Maintaining (green) LED. When pulsing, the charger has
switched to Maintain Mode.
Maintain Mode (Float-Mode Monitoring)
When the green Charged LED is pulsing, 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). This is usually caused by a drain on the battery or the battery could be bad. Make sure there are
no loads on the battery. If there are, remove them. If there are none, have the battery checked or replaced.
Maintaining the Battery
The charger maintains 12V batteries, keeping them at full charge.
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, improper connections or other
unanticipated conditions could cause excessive current draws. Occasionally monitoring your battery and
the charging process is recommended.
8.

OPERATING INSTRUCTIONS

IMPORTANT: READ INSTRUCTIONS BEFORE CONNECTING THE OUTPUT VOLTAGE SELECTOR.
Voltage detection system
8.1
Your Booster is equipped with a voltage detection system. After the connection of the clamps on the
battery terminals of the vehicle, LEDs will indicate its voltage, as follows:
• The green LED next to the 12V connector lights up when the voltage detected by the Booster is between
3V and 14.4V.
• The orange LED next to the 24V connector lights up when the voltage detected by the Booster is over 14.4V.
NOTE: If your vehicle does not start when the Booster is connected in 12V, your vehicle may start in 24V:
• When its voltage is under 14.5V
• If you connected the Booster on the wrong vehicle's battery
Detection of 24V
8.2
Detection of 24 volt on a vehicle where the cables are not visible or when the batteries are located on
both sides of the engine bay (construction, agriculture, military or other large type engines).
Use a voltmeter in DC position:
Connect the negative to the mass of the vehicle and the positive to the positive of a battery.
• If the voltmeter indicates 12V, you are not on the right battery.
• If the voltmeter indicates 24V, you are on the right battery.
Selecting the voltage
8.3
1. Determine voltage of vehicle battery. (Refer to the vehicle instruction manual.)
2. Make sure to plug the output voltage selector into the correct connector.
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