1027212
UPS 225 - 275 kVA/300kVAPF0.8
93
Revision E
User’s and Installation Guide
2.
On the System Status screen, select the UPM Command. The UPS Control Command screen is
displayed.
3.
On the UPS Control Command screen, select the UPM to shutdown.
4.
Press the CONTROLS pushbutton on the UPS Control Command menu bar. The UPM Control
Command screen is displayed.
5.
On the UPM Control Command screen, select
UPM OFF
.
6.
Press the SELECT pushbutton on the UPM Command menu bar.
The UPM status indicates
READY
. The output contactor opens. The power module remains on. The
remaining UPMs supply the critical load.
7.
To turn off the power module, press the CONTROLS pushbutton on the UPS Control Command
menu bar. The UPM Control Command screen is displayed.
8.
On the UPM Control Command screen, select
UPM OFF
.
9.
Press the SELECT pushbutton on the UPM Command menu bar.
The UPM status indicates
SHUTDOWN
. The power module is turned off. The remaining UPMs con-
tinue to supply the critical load.
Logic power remains on.
7.3.25 Single UPM restart
To restart a single UPM from a shutdown state:
1.
Press the CONTROLS pushbutton on the main menu bar. The System Status screen is displayed.
2.
On the System Status screen, select the UPM command. The UPS Control Command screen is
displayed.
3.
On the UPS Control Command screen, select the UPM to restart.
4.
Press the CONTROLS pushbutton on the UPS Control Command menu bar. The UPM Control
Command screen is displayed.
5.
On the UPM Control Command screen, select
UPM ON
.
6.
Press the SELECT pushbutton on the UPM Command menu bar.
7.
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.
8.
To transfer the UPM to Normal mode, press the CONTROLS pushbutton on the UPS Control
Command menu bar. The UPM Control Command screen is displayed.
9.
On the UPM Control Command screen, select
UPM GO TO NORMAL
.
10. Press the SELECT pushbutton on the UPM Command menu bar.
The UPM transfers to Normal mode. The UPM status indicates
ONLINE
.
7.3.26 UPS and critical load shutdown
To perform maintenance or service on the critical load, shut down power to the load by performing the
following procedure:
1.
Turn off all equipment that is being powered by the UPS.
2.
Perform the LOAD OFF procedure in Section 7.3.28. The input, output, and bypass backfeed
contactors open, the battery breaker or disconnect is tripped, and the power module is turned off.