How Power Converters Work; Led Indicator And Shutdown Protection; If The Converter'S Fuse Blows - Schumacher Electric SI4 Manual Del Usuario

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
configuration. A "modified 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, 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 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 case temperature becomes hot (exceeds 145°F). 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, 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 fitted 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.
3. Install a new 15 amp fuse. The fuse can be found on the end of the accessory
plug on the converter.
4. Do not overtighten the fuse cap; finger-tight is sufficient.
IMPORTANT: Do not install a fuse higher than 15 amps, as this may damage
the converter. Make sure to correct the cause of the blown fuse before using the
converter again.
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