UPS operations 73
NOTE: If there is only one circuit breaker for all UPSs, do not switch off utility power until all UPSs
are powered down.
9. Disconnect the UPS from utility power.
If you are shutting down all the UPSs in a parallel system , repeat steps 1 through 7 for each UPS, then
disconnect from utility power.
Powering down the parallel system
1. Switch one UPS load connector circuit breaker to the Off position.
2. Press any button on the front panel display to activate the menu options.
3. Select the TURN UPS ON/OFF, TURN SYSTEM OFF, and press the right arrow button.
4. Confirm the selection. Press and hold the right arrow button for three seconds, until the UPS stops
beeping.
The UPS removes power to the parallel UPS system output.
The output relays open, the UPS transfers to Standby mode, and the Power On LED turns off.
5. Switch the UPS battery circuit breaker to the Off position.
6. If optional ERMs are installed, switch all ERM battery circuit breakers to the Off position.
7. Switch the UPS input circuit breaker to the Off position.
8. Press ESC until the HP logo appears.
9. To completely remove power from the UPSs, continue to "Powering down the standalone UPS (on page
72)" to power down each UPS.
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