Fault
LEDs
These
amber
LEDs
light
when
a
fan
failure
occurs.
Latches
and
handles
Use
the
latches
and
handles
to
remove
or
install
the
fan
CRUs.
Attention:
Do
not
run
the
storage
subsystem
without
adequate
ventilation
and
cooling,
because
it
might
cause
damage
to
the
internal
components
and
circuitry.
Both
fan
units
must
always
be
in
place,
even
if
one
is
not
functioning
properly,
to
maintain
proper
cooling.
Use
the
following
procedure
to
replace
a
hot-swap
fan:
1.
Check
the
LEDs
on
the
back
of
the
storage
subsystem.
2.
If
the
amber
Fault
LED
is
on,
remove
the
fan
CRU
that
has
failed
by
completing
the
following
steps:
a.
Slide
the
latch
to
unlock
the
fan
CRU.
b.
Use
the
handle
(black
knob)
to
pull
the
fan
from
the
storage
subsystem.
See
Figure
92.
3.
Install
the
new
fan
unit
by
completing
the
following
steps:
a.
Place
the
fan
CRU
in
front
of
the
fan
slot.
b.
Hold
the
latch
open,
and
slide
the
fan
all
the
way
into
the
slot.
If
the
fan
does
not
go
into
the
bay,
rotate
it
180°.
Ensure
that
the
latch
is
on
the
side
closest
to
the
center
of
the
storage
subsystem.
c.
Release
the
latch.
If
the
lever
remains
open,
pull
back
on
the
fan
slightly,
and
then
push
it
in
again
until
the
latch
snaps
into
place.
4.
Check
the
LEDs.
The
Fault
LEDs
turn
off
after
a
few
seconds.
If
they
remain
on,
see
“Troubleshooting”
on
page
145.
Working
with
hot-swap
power
supplies
(dual-controller
models
only)
The
storage
subsystem
power
system
consists
of
two
power
supply
CRUs.
Exception:
The
DS4300
single-controller
storage
subsystem
(Model
6LU/6LX)
has
only
one
power
supply
CRU.
Therefore,
you
cannot
hot
swap
the
power
supply.
Figure
92.
Removing
a
fan
130
IBM
TotalStorage
DS4300
Fibre
Channel
Storage
Subsystem:
Installation,
User’s,
and
Maintenance
Guide
Summary of Contents for TotalStorage DS4300 Turbo
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