InfraStruXure System—Installation and Start-Up 67
Appendix A : System Operation

How to Transfer the UPS into Maintenance

Bypass Operation

When servicing the UPS, transfer the UPS into maintenance bypass operation. When the UPS is
operating in maintenance bypass, input power flows directly to the PDU and out to the load
equipment.
Note
Select Help from the top-level menu screen of the PDU display interface and select
the first help topic, Putting the PDU into Maintenance Bypass, or follow the
procedure below.
1. Command the UPS into static bypass operation through the UPS display interface:
a. Press the
E
SC
key at the top-level status screen to
open the top-level menu.
Top-Level Menu
b. Select Control on the top-level menu, and press
the
E
NTER
key.
c. Select UPS Into Bypass on the Control menu
and, press the
E
NTER
key.
Control Menu
d. Confirm the selection on the next screen: select
Yes, UPS into Bypass and press the
E
NTER
key.
Confirmation Screen
The UPS BYPASS LED illuminates and the following screens appear:
Control
Status
Setup
Accessories
Logging
Display
Diags
Help
UPS Into Bypass
Do Self Test
Simulate Power Fail
Graceful Reboot
Graceful Turn Off
Start Runtime Cal
Turn Load On
Confirm
Yes, UPS into Bypass
No, Abort
UPS has been
commanded to go
into Bypass...
UPS load is in Bypass
Press any key...