UPS Operating Instructions
7-38
Power Xpert
TM
9395 UPS (450–825 kVA) Installation and Operation Manual
164201725—Rev 10
www.eaton.com/powerquality
9.
On the UPM Control Command screen, select
UPM ON
.
10. Press the
SELECT
pushbutton on the UPM Command menu bar.
11. Verify the following messages display sequentially on the UPM status line:
DC STARTING, CHARGER OFF
INVERTER STARTING
INVERTER SYNCING
READY
The UPM rectifier and inverter turn on.
12. To transfer the UPM to Online mode, press the
CONTROLS
pushbutton on the UPS Control Command
menu bar. The UPM Control Command screen is displayed.
13. On the UPM Control Command screen, select
UPM GO TO ONLINE
.
14. Press the
SELECT
pushbutton on the UPM Command menu bar.
The UPM transfers to Online mode. The UPM status indicates
ONLINE
.
7.4.22 Single UPS Shutdown using Load Off
To shut down a single UPS:
1.
Open the MOB for the UPS being shut down.
2.
On the UPS to 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 transfers 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.
Perform the LOAD OFF procedure in paragraph 7.4.27 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.
8.
Verify the battery breaker or disconnect for the UPS being shut down is open. If not, open the breaker.
WARNING
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is opened.
NOTE
To shut down a single UPS, MOBs with dual auxiliary contacts must be installed and
connected according to the procedure in paragraph 5.2.
NOTE
Load Off will turn off only the UPS being shut down. The remaining UPSs will
remain online supplying power to the critical load.
NOTE
If the UPS contains an input breaker (CB1), DO NOT open the breaker unless no
input feeder breaker is installed.
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