IBM J15, Manual

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Figure 100. Remove fan module
4. Repeat steps “2” on page 100 and “3” on page 100 for each additional fan module you need to
remove.
Replace a fan module
5. To reinstall a fan module, or replace it with one from FRU stock, follow the procedure in “Installing or
replacing a fan module” on page 63.
Removing a fan interface board
You can remove a fan interface board (FIB) from a 5U expansion enclosure.
Before you begin
This task assumes that the following conditions were met:
• All power cables were removed from the enclosure, as described in “Powering off the 5U92 disk
enclosure” on page 44.
• The top cover, fan modules, and the other heavy FRUs (drives, secondary expander modules) were
removed before the enclosure was removed from the rack.
• The expansion enclosure was removed from the rack, as described in “Removing a 5U92 disk enclosure
from a rack” on page 69.
Ensure that you use a lift to support the weight of the enclosure.
About this task
The 5U expansion enclosure contains two fan interface boards (FIBs). The FIBs act as the interface
between the fans and the system drive board. FIB 1 connects fan modules 1 and 2 to the drive board; FIB
2 connects fan modules 3 and 4. If both fan modules controlled by a FIB fail, it is possible that the FIB
needs to be replaced.
Important: Because this task is disruptive to the storage system, always attempt fan replacement first.
See “Removing a fan module” on page 99 and “Installing or replacing a fan module” on page 63 for
information about the removal and replacement procedures. Ensure that both fans are installed correctly.
Perform the following procedure only if the amber fault LED on each fan remains lit ( 1 in Figure 101 on
page 102).
Chapter 3. Maintaining the system hardware 101