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UPS 225 - 275 kVA/300kVAPF0.8
1027212
User’s and Installation Guide
Revision E
WARNING
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is
opened.
3.
If the UPS contains input breaker CB1, open the UPS input breaker CB1.
4.
Open the UPS input and bypass feeder circuit breakers.
7.3.27 Charger control
To turn the battery charger on or off, perform the following procedure:
1.
Press the CONTROLS pushbutton on the main menu bar. The System Status screen appears.
2.
Scroll down to the charger.
3.
Press the CONTROLS pushbutton on the System Controls menu bar to enter the charger
command menu.
7.3.28 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.
CAUTION
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 all the UPMs are turned off.
CAUTION
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 in Section 7.3.1
or Section 7.3.2.
