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UPS Operating Instructions
NOTE
1.
Open the MOB for the UPS being shut down.
2.
On the UPS being shut down, press the CONTROLS pushbutton on the main menu bar. The System
Status screen is displayed.
3.
On the System Status screen, select the BYPASS command.
4.
Press the CONTROLS pushbutton on the System Status menu bar. The Bypass Control Command screen
is displayed.
5.
On the Bypass Control Command screen, select GO TO BYPASS.
6.
Press the SELECT pushbutton on the Bypass Command menu bar.
The UPS being shut down transfer to Bypass mode.
The BYPASS status indicator is illuminated. The Bypass status indicates ON. The UPM status indicates
READY. The power module remains on.
7.
On the System Status screen, select the UPM command.
8.
Press the CONTROLS pushbutton on the System Status Command menu bar. The UPM 1 Control
Command screen is displayed.
9.
On the UPM 1 Control Command screen, select UPM OFF.
10. Press the SELECT pushbutton on the UPM 1 Command menu bar. The UPM status indicates SHUTDOWN.
The input, output, and battery contactors open, and the power module is turned off.
Logic power remains on.
11. If there are other UPMs in the UPS, they should be shut down in sequence. Repeat Steps 7 through 10
until all other UPMs are shut down.
12. 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 on
the UPS being shut down.
Logic power remains on.
13. Verify the battery breaker or disconnect for the UPS being shut down is open. If not, open the breaker.
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is opened.
NOTE
14. Open the input and bypass feeder circuit breakers for the UPS being shut down.
The UPS is now completely shut down.
External Communications Failure alarm is active on remaining online UPSs. This is an expected event and
will clear upon UPS restart.
172
Eaton
®
Confirm that the remaining UPSs can support the additional critical load current provided
by this UPS before opening the MOB. This prevents the remaining UPSs from going into
overload when the MOB is opened.
If the UPS contains an input breaker (CB1), DO NOT open the breaker unless no input
feeder breaker is installed.
Power Xpert
®
9395P-1200 Installation and Operation Manual 164000500—Rev 11
7.5.11 Using the UPS LOAD OFF Pushbutton or Command
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