User's Manual

390 Troubleshooting and Recovery
– 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.
•
Problem: Dynamic Power Supply Engagement is enabled, but none of the
power supplies display in the
Standby state.
–
Resolution A: There is insufficient surplus power. One or more power
supplies are moved into the Standby state only when the surplus
power available in the enclosure exceeds the capacity of at least one
power supply.
–
Resolution B: Dynamic Power Supply Engagement cannot be fully
supported with the power supply units present in the enclosure. To
check if this is the case, use the Web interface to turn Dynamic Power
Supply Engagement off, and then on again. A message is displayed if
Dynamic Power Supply Engagement cannot be fully supported.
•
Problem: Inserted a new server into the enclosure with sufficient power
supplies, but the server does not power on.
–
Resolution A: Check the system input power cap setting - it might be
configured too low to allow any additional servers to be powered up.
–
Resolution B: Check for 110V operation. If any power supplies are
connected to 110V branch circuits, you must acknowledge this as a
valid configuration before servers are allowed to power on. For more
details, see the power configuration settings.