UPS OPERATING INSTRUCTIONSEaton 9395 UPS (450–825 kVA) Installation and Operation Manual 164201725 Rev 4 www.eaton.com/powerquality 7-277.3.22 UPS and Critical Load ShutdownTo perform maintenance or service on the critical load, shut down power to the load:1. Turn off all equipment that is being powered by the UPS.2. Perform the LOAD OFF procedure in paragraph 7.3.24.The input, output, battery, and bypass backfeed contactors open, and the powermodule is turned off.W A R N I N GPower is present inside the UPS cabinet until the upstream input feeder circuit breaker is opened.3. If the UPS contains input breaker CB1, open the UPS input breaker CB1.4. Open the UPS input and bypass feeder circuit breakers.7.3.23 Charger ControlTo turn the battery charger on:1. Press the CONTROLS pushbutton on the main menu bar. The System Statusscreen is displayed.2. On the System Status screen, select the CHARGER command.3. Press the CONTROLS pushbutton on the System Status menu bar. The ChargerControl Command screen is displayed.4. On the Charger Control Command screen, select CHARGER ON.5. Press the SELECT pushbutton on the Charger Command menu bar.To turn the battery charger off:1. Press the CONTROLS pushbutton on the main menu bar. The System Statusscreen is displayed.2. On the System Status screen, select the CHARGER command.3. Press the CONTROLS pushbutton on the System Status menu bar. The ChargerControl Command screen is displayed.4. On the Charger Control Command screen, select CHARGER OFF.5. Press the SELECT pushbutton on the Charger Command menu bar.7.3.24 Using the UPS LOAD OFF Pushbutton or CommandA UPS Load Off is initiated by the LOAD OFF pushbutton from the main menu bar, theLoad Off command on the UPS Control Command screen, or Load Off command onthe Bypass Control Command screen. The UPS LOAD OFF controls the UPS output bypowering down the UPS and de‐energizing the critical load.The UPS (including Bypass) remains off until restarted.
