Power
Supplies
and
Power
Supply
Fan
Assemblies
Notes:
1.
Each
drawer
can
have
up
to
two
power
supplies.
You
can
replace
each
power
supply
separately.
The
removal
and
replacement
procedures
are
the
same
for
each
power
supply.
2.
This
procedure
applies
to
the
CEC
and
I/O
drawer
power
supplies.
3.
Power
supplies
for
the
CEC
and
I/O
drawers
cannot
be
interchanged.
4.
If
a
drawer
has
two
power
supplies,
each
is
hot-pluggable.
If
only
one
needs
to
be
removed,
you
do
not
have
to
power
off
the
system.
5.
Each
power
supply
has
a
test
switch.
See
“Power
Supply
Test
Switch
Procedure”
on
page
455.
6.
If
your
drawer
has
only
one
power
supply,
the
unused
power
supply
position
must
be
filled
with
a
cooling
unit,
which
must
have
a
power
supply
fan
assembly
attached
to
it.
7.
Do
not
hot-plug
a
power
supply
if
the
ambient
room
temperature
is
greater
than
32°C
(90°F),
as
it
can
cause
loss
of
data
or
data
corruption.
8.
Be
sure
that
the
replacement
power
supply
(or
cooling
unit)
is
ready
to
install.
If
the
power
supply
(or
cooling
unit)
is
removed
for
longer
than
four
minutes,
a
shutdown
command
is
issued
to
the
operating
system.
9.
Power
supply
1
fan
assembly
(fans
1
and
2)
is
located
on
the
rear
of
the
primary
power
supply.
Power
supply
2
fan
assembly
(fans
3
and
4)
is
located
on
the
rear
of
the
secondary
power
supply.
If
only
one
fan
in
a
fan
assembly
is
bad,
the
fan
assembly
must
be
replaced.
Power
supply
fan
5
is
located
in
the
primary
power
supply
and
if
that
fan
fails,
the
power
supply
must
be
replaced.
Power
supply
fan
6
is
located
in
the
secondary
power
supply
and
if
that
fan
fails,
the
power
supply
must
be
replaced.
Fan
9
is
located
in
the
cooling
unit.
Attention:
Several
emergency
power-off
warnings
(error
codes)
can
be
logged
to
the
system
error
logs
during
the
removal
and
replacement
of
a
power
supply
with
the
power
turned
on.
These
errors
can
be
logged
as
long
as
five
minutes
after
a
hot-plug
operation
is
performed.
After
hot-plugging
a
power
supply,
wait
at
least
5
minutes
and
then
examine
the
system
error
log.
Ensure
that
no
power
supply
errors
or
power
supply
fan
errors
are
being
logged
after
the
five
minute
time
delay.
452
Service
Guide
Содержание 6H0
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Страница 29: ...CEC Drawer Front View 1 1 Power On LED Chapter 1 Reference Information 9 ...
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Страница 495: ...I O Drawer 1 2 3 4 5 6 7 8 9 10 11 16 17 18 19 20 12 14 13 13 15 21 22 23 24 26 25 27 Chapter 10 Parts Information 475 ...
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