User's Manual

Troubleshooting and Recovery 307
For information about power management on the CMC and configuring
power budget, redundancy, and power control, see "Power Management" on
page 219.
Viewing Power Budget Status
For instructions on viewing power budget status for the chassis, servers, and
PSUs using either the Web interface or RACADM, see "Viewing Power
Consumption Status" on page 235.
Executing a Power Control Operation
For instructions on powering on, powering off, resetting, or power-cycling the
system using the CMC Web interface or RACADM, see "Executing Power
Control Operations on the Chassis" on page 253, "Executing Power Control
Operations on an IOM" on page 254, and "Executing Power Control
Operations on a Server" on page 255.
Power Supply Troubleshooting
Use the items below to assist in troubleshooting power supply and power-
related issues:
• Problem: Attempted to configure the Power Redundancy Policy to AC
Redundancy,
but it failed.
–
Resolution A : This operation requires at least four power supplies
receiving input power to be present and functional in the modular
enclosure. Configuring a four or five power supply configuration to
AC Redundancy will result in the system operating in a degraded AC
Redundancy
mode. For full AC Redundancy operation, ensure that a
full PSU configuration of six power supplies is available before an
attempt is made to change the redundancy policy to
AC Redundancy .
–
Resolution B: Check if all power supplies are properly connected to
the two AC grids; the left three power supplies need to be connected
to an AC grid and the right three power supplies need to be connected
to the other AC grid, and both AC grids are working. You cannot
configure power redundancy to
AC Redundancy when one of the AC
grid is not functioning.