Owner's Manual

426 Troubleshooting and Recovery
Power Troubleshooting
The following information helps you to troubleshoot power supply and
power-related issues:
• Problem: Configured the Power Redundancy Policy to AC Redundancy ,
and a Power Supply Redundancy Lost event was raised.
–
Resolution A : This configuration requires at least one power supply in
side 1 (the left three slots) and one power supply in side 2 (the right
three slots) to be present and functional in the modular enclosure.
Additionally the capacity of each side must be enough to support the
total power allocations for the chassis to maintain
AC redundancy .
(For full AC Redundancy operation, ensure that a full PSU
configuration of six power supplies is available.)
–
Resolution B: Check if all power supplies are properly connected to
the two AC grids; power supplies in side 1 need to be connected to one
AC grid, those in side 2 need to be connected to the other AC grid,
and both AC grids need to be working.
AC Redundancy is lost when
one of the AC grids is not functioning.
•
Problem: The PSU state is displayed as Failed (No AC), even when an
AC cord is connected and the power distribution unit is producing
good AC output.
–
Resolution A: Check and replace the AC cord. Check and confirm
that the power distribution unit providing power to the power supply
is operating as expected. If the failure still persists, call Dell customer
service for replacement of the power supply.
–
Resolution B: Check that the PSU is connected to the same voltage as
the other PSUs. If CMC detects a PSU operating at a different
voltage, the PSU is turned off and marked Failed.