Lenovo Secure Managed Client Hardware Maintenance Manual - Page 61

Lenovo Secure Managed Client Manual

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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 10. Thermal cooling Symptom 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. Cause Action The first stage in the thermal control 1. Check the installation for any process is for the fans to airflow restrictions at either the automatically increase in speed when front or rear of the enclosure. A a thermal threshold is reached. This minimum gap of 2.5 cm (1 inch) may be caused by higher ambient at the front and 5 cm (2 inches) at temperatures in the local the rear is recommended. environment and may be perfectly 2. Check for restrictions due to dust normal. build up; clean as appropriate. Note: This threshold changes 3. Check for excessive recirculation according to the number of drives of heated air from rear to front. and power supplies installed. Use in a fully enclosed rack installation is not recommended. 4. Check that all blank modules are in place. 5. Reduce the ambient temperature. If the internal temperature measured in the airflow through the enclosure exceeds a preset threshold, a thermal alarm sounds. 1. Front operator's panel unit fault LED amber. 2. An amber LED is on for one or more PSUs. 1. Check to ensure that local ambient environment temperature is below the upper 35°C (95°F) specification. 2. 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) mm at the rear is recommended. 3. Check for restrictions due to dust build up; clean as appropriate. 4. Check for excessive recirculation of heated air from rear to front. Use in a fully enclosed rack installation is not recommended. 5. If possible, turn off the enclosure and investigate the problem before continuing. Drive carrier module faults Each Drive Carrier module has two LEDs: an upper (green) LED and a lower (amber) LED. v Under normal operation, the green LED is on and will flicker as the drive operates v Under normal operation, the amber LED will be: - Off if there is no drive present - Off as the drive operates - On if a drive fault is present Chapter 7. Troubleshooting and problem solving 55

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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
10.
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
recirculation
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.
1.
Front
operator's
panel
unit
fault
LED
amber.
2.
An
amber
LED
is
on
for
one
or
more
PSUs.
If
the
internal
temperature
measured
in
the
airflow
through
the
enclosure
exceeds
a
preset
threshold,
a
thermal
alarm
sounds.
1.
Check
to
ensure
that
local
ambient
environment
temperature
is
below
the
upper
35°C
(95°F)
specification.
2.
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)
mm
at
the
rear
is
recommended.
3.
Check
for
restrictions
due
to
dust
build
up;
clean
as
appropriate.
4.
Check
for
excessive
recirculation
of
heated
air
from
rear
to
front.
Use
in
a
fully
enclosed
rack
installation
is
not
recommended.
5.
If
possible,
turn
off
the
enclosure
and
investigate
the
problem
before
continuing.
Drive
carrier
module
faults
Each
Drive
Carrier
module
has
two
LEDs:
an
upper
(green)
LED
and
a
lower
(amber)
LED.
v
Under
normal
operation,
the
green
LED
is
on
and
will
flicker
as
the
drive
operates
v
Under
normal
operation,
the
amber
LED
will
be:
–
Off
if
there
is
no
drive
present
–
Off
as
the
drive
operates
–
On
if
a
drive
fault
is
present
Chapter
7.
Troubleshooting
and
problem
solving
55