4.OPERATING INSTRUCTIONS

1.Push the 12 volt power plug firmly into the 12V accessory outlet.

2.The LED indicator light should glow GREEN, verifying the inverter is receiving power.

3.Make sure the device to be operated is turned OFF.

4.Plug the device into the inverter AC outlet or USB port.

5.Turn the device on.

6.To disconnect, reverse the above procedure.

NOTE: You may hear a “buzzing” sound being emitted from inexpensive sound systems when operated with the inverter. This is due to ineffective filters in the sound system’s power supply. Unfortunately, this problem can only be resolved by purchasing a sound system with a higher quality power supply or higher quality filter.

5.POWER SOURCE

Your average automobile or marine battery at full charge will provide an ample power supply to the inverter for approximately 3 hours when the engine is off. The actual length of time the inverter will function depends on the age and condition of the battery and the power demand being placed by the device being operated with the inverter.

If you decide to use the inverter while the engine is off, we recommend you turn OFF the device plugged into the inverter before starting the engine. To maintain battery power, start the engine every 2 to 3 hours and let it run for approximately 10 minutes to recharge the battery.

Although it is not necessary to disconnect the inverter when turning over the engine, it may briefly cease to operate as the battery voltage decreases. While the inverter draws very low amperage when not in use, it should be unplugged to avoid battery drain.

6.LED INDICATOR AND SHUTDOWN PROTECTION

The LED glows GREEN automatically when plugged into a 12 volt DC source and will not glow under the following conditions:

1.When the power input from the vehicle’s battery drops to approximately 10V, low battery shutdown occurs and inverter shuts off. Solution: Recharge or replace the battery.

2.When the power input from the vehicle’s battery exceeds 15V, high voltage protection occurs. Solution: Reduce the voltage range to between 12V and 14V.

3.The continuous load demand from the equipment or device being operated exceeds the continuous load rating of the inverter being used. Solution: Use a higher capacity inverter or lower rated device.

4.The case temperature becomes hot (exceeds 145°F). Solution: Allow the inverter to cool. Do not block the cooling slots or air flow over and through the inverter. Reduce the load on the inverter to the continuous rated output.

RESET: To reset after shutdown occurs, remove the 12 volt plug from the accessory outlet. Check the source of the problem and correct. Reinsert the 12V plug into the accessory outlet.

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Schumacher PI-140 owner manual Operating Instructions, Power Source, LED Indicator and Shutdown Protection