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• 6 •
Although it is not necessary to disconnect the converter when turning over the
engine, it may briey cease to operate as the battery voltage decreases. While the
converter draws very low amperage when not in use, it should be unplugged, to
avoid battery drain.
6. HOW POWER CONVERTERS WORK
There are two stages involved in converting 12 volt DC (battery) power into 120V AC
(household voltage):
STAGE 1: The power converter uses a DC to DC transformer to increase the 12-
volt DC input voltage from the power source to 145 volt DC.
STAGE 2: The converter then converts the 145 volt DC into 120 volts AC
(household voltage) using advanced MOSFET transistors in a full bridge
conguration. A “modied sine wave” waveform is generated by this conversion.
7. 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 10 volts, low
battery shutdown occurs and the converter shuts off. Recharge or replace the battery.
2. When the power input from the vehicle’s battery exceeds 15 volts, high voltage
protection occurs. 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. Use a higher capacity
converter or lower rated device.
4. The case temperature becomes hot (exceeds 145°F). Allow the converter to
cool. Do not block the cooling slots or air ow over and through the converter.
Reduce the load on the converter 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 12 volt plug into
the accessory outlet.
8. IF THE CONVERTER’S FUSE BLOWS
Your power converter is tted with a fuse, which should not have to be replaced
under normal operating conditions. A blown fuse is usually caused by reverse
polarity or a short circuit within the device or equipment being operated.
If the fuse does blow:
1. Disconnect the device or equipment immediately.
2. Find the source of the problem and repair it.
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