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8-1
CHAPTER
8
FAN Unit Replacement
This chapter explains the replacement procedures for the FAN unit (FANU). 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.
In case of the SPARC Enterprise M8000 server, when you do maintenance on the
FAN_B on the rear side, the cables connected to the unit which mounted in the rack
space for the SPARC Enterprise M8000 server must be properly routed. For details,
see Section 4.7, “Cable Routing of the SPARC Enterprise M8000 Server” on
page 4-34.
Note – To do maintenance on the IOU or the FAN unit of the SPARC Enterprise
M8000 server, push aside the cables.
Caution – Take care to prevent the cables from blocking the ventilation slits of the
SPARC Enterprise M8000 server. (Fujitsu recommends running the cables above the
handle of the FAN unit.)