Troubleshooting
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Fluorescent Lights & Power Supplies
Some devices cannot be detected when scanned by Load Sense circuitry.
Small fluorescent lights are the most common example. Some computers
and sophisticated electronics have power supplies that do not present a
load until line voltage is available. When this occurs, each unit waits for
the other to begin. To drive these loads, either a small companion load
must be used to bring the inverter out of its search mode, or the inverter
may be programmed to remain on by defeating the search mode feature.
Clocks
The inverter’s crystal-controlled oscillator keeps the frequency accurate
to within a few seconds a day. Most clocks do not draw enough power to
trigger the load sensing circuit. In order to operate without other loads
present, the load sensing will have to be defeated. The best solution is to
buy a battery-operated clock or a clock that is not dependent on line
frequency and voltage.
Searching
If the amount of power which a load draws decreases after the load turns
on, and if this “on” load is less than the load sensing threshold, it will be
turned on and off by the inverter. Incandescent light bulbs may present
this problem when the load sensing threshold is set near the wattage rating
of the bulb. The solution is to reduce the load sense power threshold.