Schneider Electric SURTD 3000 manual Does not affect the voltage display

Feature	Function
Cold Start	When there is no utility power and the UPS is off, press and hold the					button to
	power up the UPS and connected equipment.
	The UPS will emit two beeps. During the second beep, release the button.
Self-Test	Automatic: The UPS performs a self-test automatically when turned on, and every
	two weeks thereafter (by default). During the self-test, the UPS briefly operates the
	connected equipment on battery.
	Manual: Press and hold the		button for a few seconds to initiate the self-test.
Diagnostic Utility Voltage		The UPS has a diagnostic feature that displays the utility voltage. Plug
		the UPS into the normal utility power.
		The UPS starts a self-test as part of this procedure. The self-test
		does not affect the voltage display.
		Press and hold the		button to view the utility voltage bar graph
		display. The five-LED, Battery Charge			display on the right of the
		front panel shows the utility input voltage.
		Refer to the figure at left for the voltage reading (values are not listed
		on the UPS).
		The display indicates the voltage is between the displayed value on the
		list and the next higher value.

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