UPS Operating Instructions10-13EATON Powerware® 9390 UPS (100–160 kVA) Installation and Operation Manual S 164201554 Rev E powerware.com7. To shut down the last UPM, press the REPO pushbutton switch. See “Using theParallel System Remote Emergency Power-off Switch” in paragraph 10.2.9.The input, output, and bypass backfeed contactors open, the battery breaker ordisconnect is tripped, and the power module is turned off immediately, withoutasking for verification.8. Open all UPM input and bypass (if dual feed) feeder circuit breakers.The parallel system and critical load is now de-energized.9. To restart the parallel system after using the REPO pushbutton, reset the REPOswitch and then follow the procedure in paragraph 10.2.1 or 10.2.2.10.2.8 Using the UPS LOAD OFF PushbuttonNOTE The UPM LOAD OFF pushbutton controls only the UPM on which Load Off wasactivated and only interrupts the ability of that module to deliver power to the criticalbus. The redundant modules continue to support the critical load. The UPM can be shutdown only if the remaining UPMs can support the critical load without beingoverloaded. To remove all power from the critical load, use the REPO pushbutton.A UPS Load Off is initiated by the LOAD OFF pushbutton from the main menu bar or theSystem Controls menu bar. The UPS LOAD OFF pushbutton de-energizes the critical loadand powers down the UPS.The UPS (including Bypass) remains off until restarted.To use the LOAD OFF pushbutton:1. Press the LOAD OFF pushbutton.The Load Off screen appears, providing a choice to proceed or abort theshutdown.C A U T I O NAll power to the critical load is lost when the LOAD OFF is selected in the following step. Youshould use this feature only when you want to de-energize the critical load.2. To shut down the UPS, press LOAD OFF from the Load Off menu bar, and hold forthree seconds. To abort the shutdown, press CANCEL.When LOAD OFF is selected and held for three seconds, the input, output, andbypass backfeed contactors open, the battery breaker or disconnect is tripped,and the power module is turned off.
