American Power Conversion 420/520 VA user manual Front Display Panel, Operation

3:OPERATION

Front Display Panel

INDICATOR	DESCRIPTION
Online	The UPS is supplying utility power to the connected equipment.

On Battery

The UPS is supplying battery power to the connected equipment.

Overload

The connected loads are drawing more than the UPS power rating.

Replace Battery

The battery must be replaced.

FEATURE	FUNCTION
Power Button	Press this button to turn the UPS on or off. (Read on for additional capabilities.)
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.
Cold Start	Supply battery power to the UPS and connected equipment in the absence of
	utility voltage (see Troubleshooting). Press the		button for one second and
	release. The UPS will beep briefly and go quiet. Press and hold the button again,
	but for approximately three seconds. The unit will emit a sustained beep. Re-
	lease the button during this beep.

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