UPS Operating Instructions
7.To shut down the last UPM, press the REPO pushbutton switch. See “Using the Parallel System Remote Emergency
The input, output, and bypass backfeed contactors open, the battery breaker or disconnect is tripped, and the power module is turned off immediately, without asking for verification.
8.Open all UPM input and bypass (if dual feed) feeder circuit breakers. The parallel system and critical load is now
9.To restart the parallel system after using the REPO pushbutton, reset the REPO switch and then follow the procedure in paragraph 10.2.1 or 10.2.2.
10.2.8Using the UPS LOAD OFF Pushbutton
NOTE The UPM LOAD OFF pushbutton controls only the UPM on which Load Off was activated and only interrupts the ability of that module to deliver power to the critical bus. The redundant modules continue to support the critical load. The UPM can be shut down only if the remaining UPMs can support the critical load without being overloaded. To remove all power from the critical load, use the REPO pushbutton.
A UPS Load Off is initiated by the LOAD OFF pushbutton from the main menu bar or the System Controls menu bar. The UPS LOAD OFF pushbutton
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
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.
EATON Powerware® 9390 UPS |
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