Cooling fan faults, Thermal cooling, Cooling – Lenovo Secure Managed Client User Manual
Page 37: Faults, Thermal
Cooling
fan
faults
Table
14.
Cooling
fan
faults
Symptom
Cause
Action
1.
Front
panel
fault
LED
amber
2.
Audible
alarm
sounding
3.
Fan
LED
is
illuminated
1.
Any
power
fault
2.
A
fan
failure
1.
Check
to
ensure
DC
power
to
cooling
fans
is
correct
and
that
the
LED
is
not
illuminated
2.
Disconnect
the
PSU
from
main
power
and
remove
the
faulty
fan
from
the
system.
Re-install.
If
problem
persists,
replace
PSU.
3.
Reduce
the
ambient
temperature
Thermal
cooling
The
Secure
Managed
Client
(SMC)
-
Storage
Array
uses
extensive
thermal
monitoring
to
ensure
component
temperatures
are
kept
low
and
acoustic
noise
is
minimized.
Airflow
is
from
front
to
rear
of
the
enclosure.
Table
15.
Thermal
cooling
Symptom
Cause
Action
If
the
ambient
air
is
cool
(below
25°C
or
77°F)
and
the
fans
are
observed
to
increase
in
speed
then
some
restriction
on
airflow
may
be
causing
an
additional
internal
temperature
rise.
Note:
This
is
not
a
fault
condition.
The
first
stage
in
the
thermal
control
process
is
for
the
fans
to
automatically
increase
in
speed
when
a
thermal
threshold
is
reached.
This
may
be
caused
by
higher
ambient
temperatures
in
the
local
environment
and
may
be
perfectly
normal.
Note:
This
threshold
changes
according
to
the
number
of
drives
and
power
supplies
installed.
1.
Check
the
installation
for
any
airflow
restrictions
at
either
the
front
or
rear
of
the
enclosure.
A
minimum
gap
of
2.5
cm
(1
inch)
at
the
front
and
5
cm
(2
inches)
at
the
rear
is
recommended.
2.
Check
for
restrictions
due
to
dust
build
up;
clean
as
appropriate.
3.
Check
for
excessive
re-circulation
of
heated
air
from
rear
to
front.
Use
in
a
fully
enclosed
rack
installation
is
not
recommended.
4.
Check
that
all
blank
modules
are
in
place.
5.
Reduce
the
ambient
temperature.
Chapter
5.
Troubleshooting
and
problem
solving
29