User`s guide

OPERATION

Eaton 9355 Parallel UPS (10/15 kVA) User's Guide S 164201601 Rev B www.eaton.com/powerquality

Restarting the Parallel System

To restart the parallel system:

1. Verify that the maintenance isolation breaker (if present) on the Tie

Cabinet is in the OFF position or all of the UPS breakers are in the

OFF position.

2. Switch on utility power where the UPSs are connected.

3. Wait for the front panel LCD to illuminate.

The

indicator flashes on each UPS.

4. Switch all battery circuit breakers to the ON position.

The

indicator stops flashing on each UPS.

5. Switch the UPS breakers on the parallel tie cabinet to the ON

position.

6. If present, switch the maintenance isolation breaker (MIS) on the

wall-mounted bypass cabinet to the ON position; otherwise, switch

the UPS breakers (may be designated MOB or UPS) on the

wall-mounted bypass cabinet to the ON position.

If the indicator is flashing, do not proceed until all alarms are

clear. Check the UPS status from the front panel to view the active

alarms. Correct the alarms and restart if necessary.

7. Press the

ESC

button once and then press the button to select

the TURN UPS ON/OFF menu.

8. Press the

button to select the System On option; press the

button.

9. Confirm the selection. Press and hold the

button for three

seconds, until the UPS stops beeping.

The UPS goes to Bypass mode for five seconds, and then the

indicator illuminates. Each UPS should be in Normal mode.

10. Press the

ESC

button until the Eaton logo appears.