Note
-
Read
and
understand
the
instructions
in
this
chapter
before
starting
the
maintenance
work.
Also
see
the
contents
of
Table
10-1
Types
of
maintenance
for
fan
unit
Active/hot
Inactive/hot
(system
stopped/hot)
Inactive/cold
(system
stopped/cold)
OK
OK
OK
Table
10-2
Flow
of
maintenance
Task
Replacement
1
Preparation
2
Removing
a
fan
unit
3
Installing
a
fan
unit
4
System
restoration
10.2.1
Types
of
maintenance
lists
the
types
of
maintenance
for
the
fan
units.
For
the
definition
of
maintenance,
see
"
."
10.2.2
Flow
of
maintenance
shows
the
maintenance
procedure
for
the
fan
units.
See
the
corresponding
section
and
item.
10.2.3
Precautions
for
replacement
Note
the
following
points
when
replacing
a
fan
unit:
■
When
you
replace
multiple
fan
units,
do
so
one
by
one.
If
redundancy
of
the
fan
units
cannot
be
secured,
perform
maintenance
using
the
inactive/cold
(system
stopped)
method.
■
The
fan
units
have
a
redundant
configuration.
Thus,
the
system
can
continue
operating
even
if
one
of
the
fan
units
fails.
Do
not,
however,
operate
the
system
for
an
extended
period
with
one
failed
unit.
Replace
any
failed
fan
unit
immediately.
Chapter
10
Maintaining
the
Fan
Units
109
Summary of Contents for SPARC M10-1
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Page 23: ...Figure 1 4 Removing the power cords Chapter 1 Before Starting Maintenance Work 7 ...
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