Schumacher PSI-2000 instruction manual How Do Power Inverters Work?, IMPortant safety measures

4.The case temperature exceeds 140 ºF.

Attention: The PSI-2000 is fitted with cooling fans that run as needed while the inverter is operating. If the cool- ing fans are unable to maintain a cool enough temperature for safe operation, the inverter will automatically shut down. If the inverter automatically shuts down or a continuous audible alarm is heard:

1.Turn the inverter rocker switch to the OFF (O).

2.Determine the source of the problem, and resolve it before continuing to use the inverter.

How Do Power Inverters Work?

There are two stages involved in trans- forming 12-volt DC (or battery) power into 110V AC (household voltage):

STAGE 1: The PSI-2000 power in- verter uses a DC to DC transformer to increase the 12-volt DC input voltage from the power source to 145-volts DC.

STAGE 2: The inverter then converts the 145-volts DC into 110-volts AC (house- hold voltage) using advanced MOSFET transistors in a full bridge configuration. A "modified sine wave" waveform is generated by this conversion.

I. IMPortant safety measures

Precautions to keep in mind be- fore and while using your power inverter:

•For the most effective use, place the power inverter on a flat surface.

•Keep the inverter dry.

•DO NOT allow it to come into contact with rain or moisture.

•DO NOT operate the inverter if you, the inverter, the device being operated or any other surfaces that may come in contact with any power source are wet. Water and many other liquids can conduct electricity, which may lead to serious injury or death.

•Do not place the inverter on or near heating vents, radiators or other sources of heat.

•Do not place the inverter in direct sunlight. The ideal air temperature for operation is between 30º and 105ºF.

•Keep the inverter well ventilated in order to properly disperse heat generated while it is in use.

•While in use, make sure there are several inches of clearance around the top and sides of the inverter.

•Do not use the inverter near flam- mable materials.

•Do not place or install the inverter in areas such as battery or engine compartments where fumes or gases may accumulate.

•Only connect the power inverter to a 12-volt battery. Connecting to a 6V or 16V battery will cause damage to the inverter.

•Only connect the power inverter to a 12-volt battery with the supplied 12-volt power cords. Make sure the cord connections to the inverter are tight.

•Do not modify the positive and nega- tive cables or plug in any way.

•Make sure the power consumption of the device or equipment you want to operate is compatible with the capacity of the inverter, and does not exceed 2000 watts.