1029052
UPS 675-1100 kVA 3..4x(225-275) kVA
133
Revision 008
User’s and Installation Guide
Status screen is displayed.
2.
On the System Status screen, select either the
UPS
or the
BYPASS
command.
3.
Press the CONTROLS pushbutton on the System Status menu bar. The UPS or Bypass Control
Command screen is displayed.
4.
On the Control Command screen, select
LOAD OFF
.
5.
Press the SELECT pushbutton on the Command menu bar.
The Load Off screen is displayed, providing a choice to proceed or abort the shutdown.
CAUTION
All power to the critical load is lost when LOAD OFF is selected in the following step. You should
use this feature only when you want to de-energize the critical load.
6.
To shut down the UPS, press LOAD OFF from the Load Off menu bar, and hold for three seconds.
To abort the shutdown, press CANCEL.
When LOAD OFF is selected and held for three seconds, the input, output, battery, and bypass
backfeed contactors open, and the power module is turned off on the UPS.
7.
If another UPS is to be shut down, proceed to that UPS and repeat Steps 1 through 6.
CAUTION
Do not attempt to restart the system after the Load Off until the cause of the shutdown has
been identified and cleared.
8.
Restart the UPS after pressing the LOAD OFF pushbutton by following the procedure in Section
7.4.1 or Section 7.4.2 on page 118.
WARNING
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is
opened.
7.4.32 Using the Remote Emergency Power-off Switch
A UPS emergency power-off is initiated by the REPO pushbutton switch. In an emergency, you can use
this switch to control the UPS output. The REPO switch de-energizes the critical load and powers down
the UPSs immediately, without asking for verification.
The UPS, including Bypass, remains off until restarted.
CAUTION
All power to the critical load is lost when the REPO switch is activated in the following step. You
should use this feature only when you want to de-energize the critical load.