UPS Operating Instructions
10-12
EATON
Powerware
®
9390 UPS (100–160 kVA) Installation and Operation Manual
S
164201604 Rev B
powerware.com
7.
Press the
NORMAL
pushbutton on the System Controls menu bar of the UPM.
8.
Observe the following messages appear sequentially on the power module (PM)
status line of the UPM:
DC STARTING
INVERTER STARTING
INVERTER SYNCING
READY
ONLINE
The rectifier and inverter turn on. When the inverter reaches full voltage, the UPM
synchronizes with the output and closes output contactor K3. The UPM is online
and in Normal mode with the
NORMAL
status indicator illuminated and in parallel
with the other system UPMs.
9.
Close battery breakers for the UPM any time after INVERTER SYNCING or CLOSE
BATTERY appears on the display.
10.2.7 Parallel System and Critical Load Shutdown
To perform maintenance or service on the critical load, shut down power to the load by
performing the following procedure:
C A U T I O N
Using the following procedure removes all output from the critical load. You should use this
procedure only when you need to de-energize both the parallel system and the critical load.
1.
Turn off all equipment that is being powered by the parallel system.
2.
Press the
CONTROLS
pushbutton on the main menu bar on any UPM. The System
Controls screen appears.
3.
Press the
BYPASS
pushbutton on the System Controls menu bar of any UPM.
The UPMs transfer to Bypass mode.
4.
Press the
pushbutton to display System Controls Screen 2.
5.
Press the
PM OFF
pushbutton on the System Controls menu bar.
The
power module (PM)
status indicates
SHUTDOWN
.
The input and output
contactors open, the battery breaker or disconnect is tripped, and the power
module is turned off. The bypass source supplies the critical load.
6.
Repeat Steps 2, 4, and 5 for each UPM, except the last UPM
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