Xantrex Technology PROsine 2.0 user manual Problem Loads

Troubleshooting

	freewheel when power is removed (e.g. a grinder). This long transfer may cause
	computers or other sensitive equipment to operate incorrectly. If power glitches
	must be minimized then Xantrex recommends that motor loads not be operated
	when the sensitive equipment is being used.
Problem Loads
Very Small Loads	If the power consumed by a device is less than the threshold of the Load Sense
	mode circuitry, the device will not run. See the Configure PROsine—Basic
	Menu on page 4–7 and the Configure PROsine—Advanced Menu on page 4–8
	for ways to solve this problem. Most likely the solution will be to defeat the Load
	Sense mode feature.
Fluorescent Lights	Some devices cannot be detected when scanned by Load Sense circuitry. Small
& Power Supplies	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. See the Configure PROsine—Basic Menu on
	page 4–7 and the Configure PROsine—Advanced Menu on page 4–8 for ways
	to solve this problem.
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. See Configure PROsine—Basic Menu on page 4–7 and
	the Configure PROsine—Advanced Menu on page 4–8 for ways to do this. The
	best solution is to buy a battery-operated clock or a clock that is not dependent on
	line frequency or voltage. Any clock with a crystal-controlled oscillator will
	probably work fine.
Searching	If the amount of power a load draws decreases after it turns on, and if this “on”
	load is less than the load sensing threshold, it will be turned alternately on and off
	by the inverter. Incandescent light bulbs may present this problem when the
	search threshold is set near the wattage rating of the bulb. The solution is to
	reduce the load sense power threshold.
Electronics	AM radios will pick up noise, especially on the lower portion of their band.
	Inexpensive tape recorders are likely to pick up a buzz.
Computers	When the inverter is called on to start a large load—particularly a motor load—the
	output voltage may dip briefly. This dip may cause computers powered by the
	inverter to crash.

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