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8-1
CHAPTER
8
FAN Unit Replacement
This chapter explains the replacement procedures for the FAN unit (FAN). It covers the
following:
■ Section 8.1, “Overview of the FAN Unit” on page 8-2
■ Section 8.2, “Active Replacement and Hot Replacement” on page 8-8
■ Section 8.3, “Cold Replacement” on page 8-14
There are three methods for replacing a FAN unit: active replacement , hot replacement, and
cold replacement. For the definition of each type of method, see Section 4.1, “Types of
Replacement Procedures” on page 4-2.
For the M8000 server, when you perform maintenance on the FAN_B which is located on the
rear side, the cables connected to the unit mounted in the rack space of the M8000 server
must be properly routed. For details, see Section 4.7, “Cable Routing of the M8000 Server”
on page 4-37.
Note – To do maintenance on the IOU or the FAN unit of the M8000 server, push aside the
cables.
Caution – Take care to prevent the cables from blocking the ventilation slits of the M8000
server. It is recommended to run the cables above the handle of the FAN unit.