Eaton 5115 Tower UPS (500–1400 VA) User's Guide 05146640 Rev D www.eaton.com/powerquality 31Chapter 4 OperationThis section describes: Turning the UPS on and off Starting the UPS on battery Standby mode The UPS front panel and indicators Initiating the self‐testTurning the UPS OnAfter the UPS is connected to a power outlet, the UPS enters Standbymode.To turn on the UPS, press and hold the button until you hear theUPS beep (approximately two seconds). After the UPS is turned on, itconducts a self‐test and enters Normal mode. The indicatorilluminates solid indicating that power is available to your equipment.Starting the UPS on BatteryNOTE The UPS does not auto-detect the input frequency when starting on battery; thedefault is the last frequency used by the UPS.To turn on the UPS without using utility power, press and hold thebutton for two seconds. The UPS starts up in Battery mode andsupplies battery power to your equipment. When the UPS starts onbattery, it does not conduct a self‐test to conserve battery power.