Oracle X7-8, Service Manual

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Clear Hardware Fault Messages (Oracle ILOM)
Cooling Issue Description Action Prevention
maintain the subsystem. For
example, power supplies serve
a dual function; they provide
both power and airflow. If one
power supply fails, the other
functioning power supply can
maintain both the power and the
cooling subsystems.
Troubleshooting Power Issues
If your server does not power on, the cause of the problem might be server AC Power
Connections or power supplies (PS0-3).
If your server does not power on, use the information in the following table to troubleshoot the
issue.
Power Issue Description Action Prevention
AC Power
Connection
The AC power cords are the direct
connection between the server power
supplies and the power sources. The
server power supplies need separate
stable AC circuits. Insufficient
voltage levels or fluctuations in
power can cause server power
problems. The power supplies are
designed to operate at a particular
voltage and within an acceptable
range of voltage fluctuations.
■ AC OK indicators next to the
AC inlets on the server back
panel are green when the power
is connected, and off when it is
not connected.
■ The AC OK and DC OK
indicators on the PS indicator
panels on the front panel are
green when the PS is functioning
properly.
Verify that both AC power cords
are connected to the server. Verify
that the correct power is present
at the outlets and monitor the
power to verify that it is within the
acceptable range. You can verify
proper connection and operation
by verifying the power supply (PS)
indicator panels, which are located at
the back of the server on the power
supplies. Lit green AC OK indicators
show a properly functioning power
supply. An amber AC OK indicator
indicates that the AC power to the
power supply is insufficient.
Use the AC power cord Velcro
retaining clips and position the cords
to minimize the risk of accidental
disconnection. Ensure that the
AC circuits that supply power
to the server are stable and not
overburdened.
Power Supplies
(PSUs)
The server power supplies (PS)
provide the necessary server voltages
from the AC power outlets. If the
power supplies are inoperable,
unplugged, or disengaged from the
Verify that the AC cables are
connected to both power supplies.
Verify that the power supplies are
operational (the PSU indicator
panel must have a lit green AC OK
indicator). Ensure that the power
When a power supply fails,
replace it immediately. To ensure
redundancy, the server SMOD
has two power supplies. This
redundant configuration prevents
server downtime, or an unexpected
Troubleshooting and Diagnostics 57