IBM xSeries 440 8687, Hardware Maintenance Manual

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Fans
Your xSeries 440 server has four hot-swap fan assemblies, two 150 mm x 38 mm,
and two 150 mm x 51 mm fans. The two 150 mm x 38 mm fans (fan 3 and fan 4)
are located just behind the PCI-X board and are used to cool the power supplies,
PCI-X slots and the I/O board. The two 150 mm x 51 mm fans (fan 1 and fan 2) are
located toward the front of the server and are used to cool the SMP Expansion
Modules. Refer to the following illustration.
Note: The illustrations in this document might differ slightly from your hardware.
Fan 1
Fan 2
Fan 3
Fan 4
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Latch release
Each fan has a light located on the top left side. When the fan is operating
correctly, this light is off. If a fan stops working, the light path diagnostics feature will
light a system-error light on the front of the server, indicating that there is a problem
and guide you to the defective fan. When this occurs, first identify the defective fan;
then, using the appropriate procedure, remove and replace the fan.
Fans 1 and 2
As shown in the previous illustration, fans 1 and 2 are located on the right side of
the server, and cool the SMP Expansion Modules. These fans are redundant,
meaning that if one fails, the remaining fan will temporarily speed up to properly
cool the SMP Expansion Modules. In the event of a failure, replace the
malfunctioning fan within 48 hours.
Complete the following steps to replace fans 1 and 2:
1. Read the information in “Installation guidelines” on page 71 and “Safety
information” on page 201.
Note: All fans must be replaced with 48 hours of failing.
2. Remove the fan from the server:
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xSeries 440 Type 8687: Hardware Maintenance Manual