Oracle X5-4 Service Manual page 53

Troubleshooting Hardware Faults Using Oracle ILOM
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 25). 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 23) 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.
Hardware Component Failure
Components, such as power supplies and fan modules, are an integral part of the server cooling
system. When one of these components fails, the server internal temperature can rise. This rise
in temperature can cause other components to enter into an over temperature state. Additionally,
some components, such as processors, might overheat when they are failing, which can also
generate an over-temperature event.
Troubleshooting and Diagnostics 53