Eaton Power Xpert 9395 550/275 Installation And Operation Manual page 176

7. On the UPS being restarted, press the CONTROLS pushbutton on the main menu bar. The System Status
screen is displayed.
8. On the System Status screen, verify the UPS status is SHUTDOWN and the UPM status is SHUTDOWN.
9. Close the battery breaker for the UPS being restarted.
10. Verify no alarms are active on UPS being restarted.
11. Verify the External Communications Failure alarm has cleared and no other alarms are active on the online
UPSs.
12. On the System Status screen, select the UPS command.
13. Press the CONTROLS pushbutton on the System Status menu bar. The UPS Control 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.
NOTE If the UPS is starting on a bus with other online paralleled UPSs, the UPS will not go to
bypass during startup. The UPS will start, sync to the other UPSs online, and go online.
16. Verify the following messages display sequentially on the UPS status line:
DC STARTING, CHARGER OFF
INVERTER STARTING
INVERTER SYNCING
ONLINE, CHARGER ON
The rectifier and inverter turn on. The inverter continues to ramp to full voltage.
Once the inverter reaches full voltage, the UPS output contactor (K3) closes. Power is now supplied to the
critical load in Online mode along with the other UPSs online. It takes approximately one minute for the
UPS to achieve Online mode.
The Online status indicator is illuminated. The UPS status indicates ONLINE. The UPM status indicates
ONLINE, CHARGER ON.
7 7 . . 4 4 . . 2 2 5 5 U U P P S S a a n n d d C C r r i i t t i i c c a a l l L L o o a a d d S S h h u u t t d d o o w w n n
To 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 distributed bypass system.
2. Transfer the UPSs to bypass by performing the procedure in paragraph
7.4.17 Transfer from Online to Bypass
3. Perform the LOAD OFF procedure in paragraph
on the UPS being shut down.
The input, output, battery, and bypass backfeed contactors open, and the power module is turned off.
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is opened.
4. If the UPSs contain input breakers (CB1), open all UPS input breakers.
5. Open the input and bypass feeder circuit breakers on all UPSs.
Mode.
7.3.24 Using the UPS LOAD OFF Pushbutton or Command
Eaton Power Xpert 9395 UPS Installation and Operation Manual 164201716—Rev 14
UPS Operating Instructions
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