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UPS Operating Instructions
7-42
Power Xpert
TM
9395 550/275 UPS (225–550 kVA) Installation and Operation Manual
164201716—Rev 8
www.eaton.com/powerquality
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.
3.
If another UPS is to be shut down, proceed to that UPS and repeat Steps 1 and 2.
CAUTION
Do not attempt to restart the system after Load Off until the cause of the shutdown has been identified
and cleared.
4.
Restart the UPS after pressing the
LOAD OFF
pushbutton by following the procedure in paragraph 7.4.1 or
WARNING
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is opened.
To use the
LOAD OFF
command:
1.
Press the
CONTROLS
pushbutton on the main menu bar of the UPS to be shut down. The System 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 paragraph 7.4.1 or
WARNING
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is opened.
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