UPS Operating Instructions
6-22
Eaton 9EHD UPS (80-200 kVA, 380/400/415V) Installation and Operation Manual
6.4.10 Using the UPS LOAD OFF Command
A UPS Load Off is initiated by the Load Off command on the UPS Control screen. The UPS LOAD OFF controls
the UPSs output by powering down the UPS and de-energising the critical load.
The UPSs (including Bypass) remains off until restarted.
To use the LOAD OFF command:
1. Select the CONTROLS symbol on the main menu bar on the UPS to be shut down. The System Control
screen is displayed.
2. Select UPS on the System Control screen.
3. On the UPS System Control screen, select the NORMAL LOAD OFF or BYPASS LOAD OFF
command depending on the UPS mode, then press the RETURN pushbutton.
The Verify Action screen is displayed, 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-energise the critical load.
4. Select Yes or no, then press the RETURN pushbutton.
Selecting Yes will immediately shut down the UPS and de-energising the critical load. Selecting No will
abort the shutdown.
CAUTION
Do not attempt to restart the system after Load Off until the cause of the shutdown has been
identified and cleared.
6. To restart the UPS after pressing the LOAD OFF pushbutton, follow the procedure in paragraph 6.4.1 or
6.4.2.
WARNING
Power is present inside the UPS cabinet after the upstream input feeder circuit breakers are
opened because of the installed external battery cabinet.
5. If another UPS is to be shut down, proceed to that UPS and repeat Step 1 through Step 4.
Summary of Contents for 9EHD Series
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