APC RS 550 manual Function Button Quick-Reference, Description, Timing, Seconds

Function Button Quick-Reference

Function	Button	Timing	UPS	Description
		(seconds)	Status
Power

Power On

Power Off

0.2Off

2 On

Press POWER to start receiving input utility power. If A/C input power is not available, the unit will run on battery power.

The unit is not receiving input utility power, but is providing surge protection.

Display

Status Inquiry

Full-Time/Power- Saving mode

Mute

0.2On

2 On

Verify the status or condition of the unit. The LCD will illuminate for 60 seconds.

The LCD will illuminate and the unit will beep to confirm the Full-Time mode. The LCD will darken and the unit will beep to confirm the Power-Saving mode. While in Power-Saving Mode, the LCD will illuminate if a button is pressed, then darkens after 60 seconds of no activity.

Event Specific	0.2	On	Disable any audible alarms caused by an event.
General Status Enable/	2	On	Enable or disable the audible alarms. The Mute icon will
Disable			illuminate and the unit will beep one time. The Mute function will
			not activate unless the UPS is operating on battery power.
Sensitivity	6	Off	The Load Capacity icon will blink, indicating that the unit is in
			programming mode. Use the POWER button to scroll through
			Low, Medium, and High, stop at selected sensitivity. The unit will
			beep to confirm selection. See Configuration for details.
Master/Controlled	2	On	The leaf icon will darken indicating that the Master Outlet feature
outlet Enable/Disable			is disabled or illuminate to indicate the Master Outlet feature is
			enabled. The unit will beep once.
Master/Enable	6	On	While calibrating the threshold setting, the device connected to
Threshold			the Master Outlet should be turned off or placed in Standby or
Calibration			Sleep mode. Upon completion, Power-Saving icon will flash 3
			and beep 3 times.
Self-Test (manual)	6	On	The UPS will perform a test of the internal battery. Note: This
			will happen automatically when the unit is turned ON.
Event Reset	0.2	On	When the Event screen is visible, press and hold DISPLAY, then
			press POWER, to clear the utility failure event counter.
Fault Reset	2	Fault	After a fault has been identified, press POWER to remove the
			visual indication and return to standby status.

Back-UPS® RS Installation and Operation 5