Starting The Ups In Bypass Mode - Powerware 9330 Installation & Operation Manual

11.
Select NORMAL or HI-EFF from the System Control menu.
Normal Mode Requested appears on the screen.
The critical load is immediately supplied by the bypass source, in Bypass mode, until
the inverter turns on and the UPS transfers to Normal mode. The status indicator on
the UPS Control Panel indicates the UPS is in Bypass mode.
12.
Observe the following messages appear sequentially on the PPU status line:
WAITING FOR INPUT
DC STARTING
INVERTER STARTING
SYNCING
ONLINE
The rectifier and inverter turn on. When the inverter reaches full voltage, UPS output
contactor K3 closes and the static switch turns off supplying power to the critical load
in Normal mode. It takes less than 1 minute for the UPS to achieve Normal mode.
13.
The UPS is now operating in the Normal mode and the NORMAL status
indicator is illuminated.

10.3 Starting the UPS in Bypass Mode

If the Inverter Output of the UPS is not available and the critical load needs to be
energized, perform the following procedure:
1.
Ensure the UPS circuit breakers and switches are set as follows:
UPS Input Breaker (CB1)
UPS Battery Breaker (CB2)
UPS Maintenance Bypass Switch
Options Cabinet Maintenance Bypass Switch (if installed) UPS
2.
Close the UPS input feeder circuit breaker.
3.
If UPS is dual feed, close UPS Bypass input feeder circuit breaker.
4.
If Options cabinet is installed, close Options cabinet Input, Bypass, and Output
circuit breakers.
5.
Observe UPS monitor screen becoming active as an indication of logic power.
6.
Press the System Control pushbutton. The System Control screen appears.
7.
On the System Control screen, the PPU status should indicate SHUTDOWN,
after approximately 20 seconds
8.
Select BYPASS from the System Control menu.
Bypass Mode Requested appears on the screen.
The critical load is immediately supplied by the bypass source, in Bypass mode.
9.
The UPS is now operating in the bypass mode and the BYPASS status
indicator is illuminated.
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Powerware 9330 (10 kVA- -40 kVA) Installation and Operation
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164201300 Rev. N 013004