Chapter 2. Presentation 9Operation status Cause DescriptionStandby mode The UPS is Off. Equipment is not powered until power( ) button is pressed.Online mode The UPS is operating normally. The UPS is powering and protectingthe equipment.Battery mode1 beep every 10 secondsA utility failure has occurred and theUPS is on Battery mode.The UPS is powering the equipmentwith the battery power. Prepare yourequipment for shutdown.End of backup time1 beep every 3 secondsThe UPS is on Battery mode and thebattery packs are running low.This warning is approximate, and theactual time to shut down might varysignificantly.Depending on the UPS load andnumber of Extended Battery Modules(EBMs), the "Battery Low" warningmight occur before the battery packsreach 20% capacity.High Efficiency mode The UPS is operating on HighEfficiency mode.The UPS is powering and protectingthe equipment.Bypass mode An overload or a fault has occurred ora command has been received, andthe UPS is in Bypass mode.Equipment is powered but notprotected by the UPS.Display functionsPress the Enter ( ) button to activate the menu options. Use the two middle buttons ( and ) to scrollthrough the menu structure. Press the Enter ( ) button to select an option. Press the button to cancel orreturn to the previous menu.