UPS Operating Instructions
10.1.3 Starting the Power Module
To start the power module without transferring the critical load to normal, perform the following procedure:
1.Close the UPS input feeder circuit breaker.
2.If the UPS is dual feed, close the UPS Bypass input feeder circuit breaker.
3.Observe the UPS control panel becoming active, indicating logic power.
4.Press the CONTROLS pushbutton on the main menu bar. The System Controls screen appears.
5.On the System Controls screen, the power module (PM) status should indicate
SHUTDOWN.
6.Press the 
pushbutton to display System Controls Screen 2.
7.Press the PM ON pushbutton on the System Controls menu bar.
8.Observe the following messages appear sequentially on the power module (PM) status line:
DC STARTING INVERTER STARTING INVERTER SYNCING READY
The rectifier and inverter turn on. When the inverter reaches full voltage, the UPS is ready to transfer to the Normal mode and supply the critical load.
10.1.4Transfer from Normal to Bypass Mode
To transfer the critical load to Bypass mode, perform the following procedure:
C A U T I O N
In Bypass mode, the critical load is not protected from commercial power interruptions and abnormalities.
1.Press the CONTROLS pushbutton on the main menu bar. The System Controls screen appears.
2.Press the BYPASS pushbutton on the System Controls menu bar.
The UPS transfers to Bypass mode and the critical load is immediately supplied by the bypass source. If the bypass source is not available, the power processor remains on and an alarm sounds.
EATON Powerware® 9390 UPS |
