Eaton Power Xpert 9395C, Installation And Operation Manual

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Eaton Power Xpert 9395C UPS Installation and Operation Manual 164000821—Rev 06 137
5. Use the Prev and Next buttons to select the UPMs as applicable and repeat step 4. to turn off their
chargers.
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A UPS Load Off is initiated by either a command or a pushbutton. It controls the UPSs' outputs by powering
down the UPS and de-energizing the critical load. The UPSs (including Bypass) remain off until restarted.
This procedure initiates a UPS Load Off using the LOAD OFF command.
NOTE The UPS LOAD OFF controls each UPS independently and does not shut down the
whole distributed bypass system unless all UPSs have been transferred to bypass. To
immediately shut down the whole system, use the REPO switch (see paragraph ).
All power to the critical load is lost when a LOAD OFF command is issued in the following step. You should use
this feature only when you want to de-energize the critical load.
To use the LOAD OFF command:
1. Press the Controls tab on the main menu bar of the UPS to be shut down. The System Controls screen
is displayed (see Figure 79 ).
2. On the System Controls screen, select LOAD OFF.
The Load Off screen is displayed, providing a choice to proceed or abort the shutdown.
When LOAD OFF is selected the input contactor opens 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 through 6.
Do not attempt to restart the system after the Load Off until the cause of the shutdown has been identified and
cleared.
4. Restart the UPS by following the procedure in paragraph
7.5.1 Starting the Distributed Bypass System in Online Mode or
7.5.2 Starting the Distributed Bypass System in Bypass Mode .
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is opened.
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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.
UPS Operating Instructions