Eaton 9390 - Page 129

Eaton® 9390 (100–160 kVA) UPS Installation and Operation Manual 164201604—Rev F 114
5. On the System Controls screen of each UPM, the power module (PM) status should indicate
SHUTDOWN.
6. Press the BBYYPPAASSSS pushbutton on the System Controls menu bar of any UPM.
The critical load is immediately supplied by the bypass source, in Bypass mode.
7. The UPMs are now operating in Bypass mode and the BBYYPPAASSSS status indicator on each UPM is
illuminated.
99..22..33 TTrraannssffeerr PPaarraalllleell SSyysstteemm ffrroomm NNoorrmmaall ttoo BByyppaassss MMooddee
To transfer the critical load to Bypass mode:
In Bypass mode, the critical load is not protected from commercial power interruptions and abnormalities.
1. Press the CCOONNTTRROOLLSS pushbutton on the main menu bar on any UPM. The System Controls screen
appears.
2. Press the BBYYPPAASSSS pushbutton on the System Controls menu bar of any UPM.
The UPMs transfer 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.
3. The UPMs are now operating in Bypass mode and the BBYYPPAASSSS status indicator on each UPM is
illuminated.
The power module (PM) status indicates READY on each UPM. The system is now on bypass and the
UPM power processors remain on.
Power is present inside the UPM cabinets.
99..22..44 TTrraannssffeerr PPaarraalllleell SSyysstteemm ffrroomm BByyppaassss ttoo NNoorrmmaall MMooddee
To transfer the critical load to Normal mode:
1. Press the CCOONNTTRROOLLSS pushbutton on the main menu bar on any UPM. The System Control screen
appears.
2. Press the NNOORRMMAALL pushbutton on the System Controls menu bar of any UPM.
The UPMs transfer to Normal mode. If the power processor is not available, the system remains on bypass
and an alarm sounds.
3. The UPMs are now operating in Normal mode, and the NNOORRMMAALL status indicator on each UPM is
illuminated.
The power module (PM) status indicates ONLINE on each UPM.
UPS Operating Instructions
For Internal Use Only