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7 7 . . 5 5 . . 8 8 S S i i n n g g l l e e U U P P S S R R e e s s t t a a r r t t
To restart a single UPS from a shutdown state:
1.
Close the MOB for the UPS being restarted.
2.
Close UPS input and bypass feeder circuit breakers for the UPS being restarted.
3.
Unfasten the front door latch and swing the door open on the UPS being restarted (see
4.
If input breaker (CB1) is installed on the UPS being restarted and is open, close the breaker.
5.
Close the door and secure the latch.
6.
On the UPS being restarted, observe the UPS control panel display becoming active, indicating logic
power.
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 . . 5 5 . . 9 9 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.
Perform the LOAD OFF procedure in paragraph
on the UPS being shut down.
7.5.11 Using the UPS LOAD OFF Pushbutton or Command
Eaton
®
Power Xpert
®
9395P-1200 Installation and Operation Manual 164000500—Rev 11
UPS Operating Instructions
Figure
17).
173
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