Oracle Sun Server X4-4, Service Manual

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Troubleshoot Hardware Faults
50 Sun Server X4-4 Service Manual • October 2015
is too high, cooling does not occur, and the internal temperature of server and its components
increases. This can cause poor server performance or a failure of one or more components.
Action : Check the ambient temperature of the server space against the environmental
specifications for the server (see “Server Specifications” ). If the temperature is not within the
required operating range, remedy the situation immediately.
Prevention
: Periodically check the ambient temperature of the server space to ensure that it
is within the required range, especially if you have made any changes to the server space (for
example, added additional servers). The temperature must be consistent and stable.
Airflow Blockage
The server cooling system uses fans to pull cool air in from the server front intake vents and
exhaust warm air out the server back panel vents. If the front or back vents are blocked, the
airflow through the server is disrupted and the cooling system fails to function properly causing
the server internal temperature to rise.
Action : Inspect the server front and back panel vents for blockage from dust or debris.
Additionally, inspect the server interior for improperly installed components or cables that can
block the flow of air through the server.
Prevention
: Periodically inspect and clean the server vents using a vacuum cleaner. Ensure that
all components, such as cards, cable, fans, air baffles and dividers are properly installed. Never
operate the server without the top cover installed.
Internal Pressures Compromised
The server has two main cooling area (see “Cooling Subsystem” on page 26 ). To function
properly, these areas have separate pressures that are maintained using dividers, baffles,
component filler panels, and the server top cover. These things need to be in place for the server
to function as a sealed system. If the internal pressures are compromised, the server cooling
system, which relies on the movement of cool air through the server, cannot function properly,
and the airflow inside the server becomes chaotic and non-directional.
Action
: Inspect the server interior to ensure that the air divider and air baffle ( “Two-CPU
Configuration” on page 24 ) are properly installed. Ensure that all external-facing slots (storage
drive, DVD, PCIe) are occupied with either a component or a component filler panel. Ensure
that the server top cover is in place and sits flat and snug on top of the server.
Prevention
: When servicing the server, ensure that the divider and baffle are installed correctly
and that the server has no unoccupied external-facing slots. Never operate the server without the
top cover installed.