Sun Microsystems Netra 1290, Руководство администратора

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Chapter 4 Troubleshooting 45
Abnormal Operation
When an abnormal condition of faulty incoming power exists, the amber Fault LED
(
) is lit on one or more of the involved FRUs.
Main Fans
The server has a fan tray assembly that cools all components in the server. There are
eight hot-swappable main fans in the fan tray. If a fan in the fan tray is faulty, the
system controller changes the fan speed of the remaining working fans to high speed
to compensate for reduced air flow. In this situation, the Fault LED (
) on the
faulty fan is lit. See the Netra 1290 Server Service Manual , 819-4373, for fan
replacement procedures.
System Controller
The system controller receives error messages from each of the boards and
determines the appropriate actions to take. Typical actions include:
■
Setting the appropriate error status bits
■
Asserting error pause to stop further address packets
■
Interrupting the system controller
Interpreting LEDs
Use the LEDs on the individual server components to determine if the system is
operating normally. Routinely monitor the LEDs on the following boards and
devices:
■
System controller and I/O assembly (IB_SSC)
■
CPU/memory board
■
L2 repeater boards
■
Fan trays
■
Power supplies
When the Fault ( ) LED is on, this indicates that a fault has occurred in the
server, and you should take immediate action to clear the fault.
TABLE 4-2
lists the
LED status codes for the server and for the following hot-swappable components:
■
CPU/memory boards
■
Power supplies