UPS OPERATING INSTRUCTIONS
Eaton
®
9390 UPS (20–80 kVA) and 9390IT (20-40 kVA) Installation and Operation Manual
S
164201603 Rev 4
www.eaton.com/powerquality
9-10
9.1.19
Using the UPS LOAD OFF Pushbutton
A UPS Load Off is initiated by the
LOAD OFF
pushbutton from the main menu bar or
the System Controls menu bar. This pushbutton can be pressed to control the UPS
output. The UPS
LOAD OFF
pushbutton de‐energizes the critical load and powers down
the UPS.
The UPS (including Bypass) remains off until restarted.
To use the
LOAD OFF
pushbutton:
1.
Press the
LOAD OFF
pushbutton.
The Load Off screen appears, providing a choice to proceed or abort the
shutdown.
C
A
U
T
I
O
N
All power to the critical load is lost when the LOAD OFF is selected in the following step. You should use this
feature only when you want to de‐energize the critical load.
2.
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, and
bypass backfeed contactors open, the battery breaker or disconnect is tripped,
and the power module is turned off.
C
A
U
T
I
O
N
DO NOT attempt to restart the system after Load Off until the cause of the shutdown has been identified and
cleared.
3.
To restart the UPS after pressing the
LOAD OFF
pushbutton, follow the procedure
9.1.20
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 UPS immediately, without asking
for verification.
The UPS, including Bypass, remains off until restarted.
C
A
U
T
I
O
N
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.
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