UPS OPERATING INSTRUCTIONS
Eaton
®
9390 UPS (20–80 kVA) and 9390IT (20-40 kVA) Installation and Operation Manual
S
164201603 Rev 4
www.eaton.com/powerquality
9-9
9.1.16
Transfer from Normal to Bypass Mode and Shut Down UPS
To transfer the critical load to Bypass mode and shut down the UPS:
1.
Transfer the critical load to bypass by performing the procedure in
paragraph 9.1.4.
2.
Press the
CONTROLS
pushbutton on the main menu bar. The System Control
screen appears.
3.
Press the pushbutton to display System Controls Screen 2.
4.
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.
W
A
R
N
I
N
G
Power is present inside the UPS cabinets.
9.1.17
UPS and Critical Load Shutdown
To perform maintenance or service on the critical load, shut down power to the load
by performing the following procedure:
1.
Turn off all equipment that is being powered by the UPS.
2.
Perform the LOAD OFF procedure in paragraph 9.1.19.
The input, output, and bypass backfeed contactors open, the battery breaker or
disconnect is tripped, and the power module is turned off.
W
A
R
N
I
N
G
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is opened.
3.
Open the UPS input and bypass (if dual feed) feeder circuit breakers.
9.1.18
Charger Control
To turn the battery charger on or off:
1.
Press the
CONTROLS
pushbutton on the main menu bar. The System Control
screen appears.
2.
Press the pushbutton to display System Controls Screen 2.
3.
Press the
CHGR ON
or
CHGR OFF
pushbutton on the System Controls menu bar to
toggle the charger on or off.
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