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1.2.2
Main Fans
The system has a fan tray assembly that cools all components in the system. There
are eight hot-swappable main fans in the fan tray. To determine if a fan in the fan
tray is faulty:
1. Inspect the fan LEDs. Determine if one or more fault LEDs (
lit, which means there is an internal fault or failure.
See
Section 1.4.1, "Interpreting LEDs" on page 1-9
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.
2. Replace the faulty fan. The fans are hot-swappable.
See
Section 7.1.2, "Removing a Main Fan" on page 7-4
Main Fan" on page
1.2.3
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
■
1.3
SunVTS Software
The SunVTS software executes multiple diagnostic hardware tests from a single
user interface. The SunVTS software verifies the configuration, functionality, and
reliability of most hardware controllers and devices. For more information on the
SunVTS software, see
7-6.
.
TABLE 1-3
) on each fan is
and
.
TABLE 7-4
and
Section 7.1.3, "Installing a
Chapter 1 Fault Isolation
1-7
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