Power Source; Led Indicator And Shutdown Protection - Schumacher XI75B Owner's Manual

7. POWER SOURCE

Your average automobile battery at full charge will provide an ample power supply
to the converter when the engine is on. Keep the car running at all times when
using the converter. The actual length of time the converter will function depends
on the age and condition of the battery and the power demand being placed by the
device being operated with the converter.
When possible, recharge your batteries when they are not more than 50%
discharged. This gives the batteries a much longer life cycle than recharging when
they are more deeply discharged.
The power converter has a battery low voltage shutdown at 10.5V±0.3V DC. With
moderate to heavy loads, this will protect against over-discharging the battery.
If the converter is running only light loads it is advisable to recharge before the
converter low voltage shutdown point is reached.
IMPORTANT: The converter draws low amperage from the battery with the main
ON/OFF switch turned on and no load connected. To prevent battery discharge,
turn the converter off and unplug it when you are not using it.

8. LED INDICATOR AND SHUTDOWN PROTECTION

The LED glows GREEN automatically when plugged into a 12 volt DC source, but
will not glow under the following conditions:
1. When the power input from the vehicle's battery drops to approximately 10 volts,
low battery shutdown occurs and converter shuts off.
Solution: recharge or replace the battery.
2. When the power input from the vehicle's battery exceeds 15 volts, high voltage
overload protection occurs.
Solution: reduce the voltage range to between 12 volts and 14 volts.
3. The continuous load demand from the equipment or device being operated
exceeds the continuous load rating of the converter being used.
Solution: Use a higher capacity converter or lower rated device.
4. The case temperature becomes hot (exceeds 145°F).
Solution: Allow the converter to cool. Do not block the cooling slots or air
flow over and through the converter. Reduce the load on the converter to the
continuous rated output.
RESET: To reset after shutdown occurs:
1. Disconnect the converter from the 12V power source.
2. Check the source of the problem and correct.
3. Reconnect the converter to the 12V power source.
NOTE: If the red LED is lit and the green LED is not, see Troubleshooting.
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