P-164000476
9395P 500kVA / 600 kVA
122
Revision 002
User’s and Installation Guide
WARNING
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is
opened.
NOTE
If the UPS contains an input breaker (CB1), DO NOT open the breaker unless no input feeder
breaker is installed.
10. Open the input and bypass feeder circuit breakers for the UPS being shut down.
The UPS is now completely shut down.
External Communications Failure alarm is active on remaining online UPSs. This is an expected
event and will clear upon UPS restart.
7.5.18 Single UPS restart
To restart a single UPS from a shutdown state:
1
Close the MOB for the UPS being restarted.
2.
Close UPS input and bypass feeder circuit breakers for the UPS being restarted.
3.
Unfasten the front door latch and swing the door open on the UPS being restarted.
4.
If input breaker (CB1) is installed on the UPS being restarted and is open, close the breaker.
5.
Close the door and secure the latch.
6.
Close all the battery breakers.
7.
On the UPS being restarted, observe the UPS control panel display becoming active, indicating
logic power.
8.
On the UPS being restarted, press the LOCK icon on the main screen. The Sign In screen is
displayed. Use operator password to log in (factory default password is 0101).
9.
Verify no alarms are present on the ACTIVE EVENTS screen under the LOGS menu on the UPS
being restarted.
10. Verify External Communications Failure alarm has cleared and no other alarms are active on the
online UPSs.
11. Select CONTROLS on the main screen. SYSTEM CONTROLS screen opens up.
12. Select GO ONLINE.
The rectifier and inverter turn on. The inverter continues to ramp to full voltage. Once the inverter
reaches full voltage, the UPS output contactors (K3) close. Power is now supplied to the critical
load in Normal mode along with the other UPSs online. It takes approximately one minute for the
UPS to achieve Normal mode.
NOTE
If the UPS is starting on a bus with other online paralleled UPSs, the UPS will not go to bypass
during startup. The UPS will start, sync to the other UPSs online, and go online.
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