Filter
Top Products
UPS Operating Instructions
10-3
Powerware
®
9390 UPS (40–80 kVA) Installation and Operation Manual S 164201535 Rev C
10.1.3 Starting the Power Module
To start the power module without transferring the cr itical 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.
10.1.4 Transfer from Normal to Bypass Mode
To transfer the critical load to Bypass mode, perform the following procedure:
CAUTION
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 BYP ASS pushbutton on the System Controls menu bar.
TheUPStransferstoBypassmodeandthecriticalloadisimmediatelysuppliedby
the bypass source. If the bypass source is not available, the power processor
remains on and an alarm sounds.