UPS OPERATING INSTRUCTIONSPower Xpert 9395 UPS (450–550 kVA) Installation and Operation Manual 164201701 Rev 3 www.eaton.com/powerquality 7-1110. Close the battery breaker.11. Verify no alarms are active.12. On the System Status screen, select the UPS command.13. Press the CONTROLS pushbutton on the System Status menu bar. The UPSControl Command screen is displayed.14. On the UPS Control Command screen, select GO TO ONLINE.15. Press the SELECT pushbutton on the UPS Command menu bar.If Auto Bypass is enabled (factory default), the critical load is immediatelysupplied by the bypass source, in Bypass mode, until the inverter turns on andthe UPS transfers to Online mode. The status indicator on the UPS control panelindicates the UPS is in Bypass mode. If Auto Bypass is not enabled, the UPSoutput remains off until the UPS transfers to Online mode.16. Verify the following messages display sequentially on the UPM status line:DC STARTING, CHARGER OFFINVERTER STARTINGINVERTER SYNCINGONLINE, CHARGINGThe rectifier and inverter turn on. The inverter continues to ramp up to fullvoltage.Once the inverter reaches full voltage, the UPS output contactor K3 closes andthe static switch turns off. Power is now supplied to the critical load in Onlinemode. It takes approximately one minute for the UPS to achieve Online mode.The ONLINE status indicator is illuminated. The UPS status indicates ONLINE. TheUPM status indicates ONLINE, CHARGING.7.3.2 Starting the UPS in Bypass ModeIf the inverter output of the UPS is not available and the critical load needs to beenergized:C A U T I O NIn Bypass mode, the critical load is not protected from commercial power interruptions and abnormalities.1. Unfasten the front door latch and swing the door open (see Figure 4‐2 onpage 4-4).2. If the UPS contains input breaker CB1, verify that input breaker CB1 is open.3. Close the UPS input feeder circuit breaker.4. Close the UPS Bypass input feeder circuit breaker.5. If the UPS contains input breaker CB1, close input breaker CB1.6. Close the door and secure the latch.7. Observe the UPS control panel becoming active, indicating logic power.
