MAXDATA SR1202 M1, Руководство пользователя

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44 45 MAXDATA SR1202 M1 – Technical User Guide Troubleshooting and Problem Solving 44 45 MAXDATA SR1202 M1 – Technical User Guide Troubleshooting and Problem Solving
Thermal Control
SR1202 enclosures use extensive thermal monitoring and take a number of actions to ensure
component temperatures are kept low and also to minimize acoustic noise. Air flow is from front to
rear of the enclosure.
Symptom Cause Action
If the ambient air is cool
(below 25 °C) and the fans
are observed to increase
in speed then some
restriction on airflow may
be causing 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 envi-
ronment and may be perfectly
normal.
NOTE: This threshold changes
according to the number of
drives and power supplies
fitted.
1. Check the installation for any airflow
restrictions at either the front or rear
of the enclosure. A minimum gap of
25 mm at the front and 50 mm 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 the 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.
Thermal Alarm
Symptom Cause Action
1. Ops Panel SYSTEM
FAULT LED AMBER.
2. An AMBER LED on one
or more Power Supply
Module.
3. Audible Alarm
Sounding.
4. Air temperature exiting
PSU above 55 °C.
1. If the internal temperature
measured in the airflow
through the enclosure
exceeds a pre-set threshold
a thermal alarm will sound.
2. Cooling Module failure
1. Check local ambient environment
temperature is below the upper
40 °C specification.
2. Check the installation for any airflow
restrictions at either the front or rear
of the enclosure. A minimum gap of
25 mm at the front and 50 mm at the
rear is recommended.
3. Check for restrictions due to dust
build-up, clean as appropriate.
4. Check for excessive re-circulation of
heated air from rear to the front. Use
in a fully enclosed rack installation is
not recommended.
5. If possible shutdown the enclosure
and investigate the problem before
continuing.
6. Replace Cooling Module.
Thermal Warnings
Symptom Cause Action
1. ALL AMBER LEDs on
the Ops Panel and on
ALL drive bays illumi-
nated flash.
2. Audible Alarm sounds
almost continuously
and cannot be muted.
At a higher threshold than the
Thermal Alarm (this should
already have been activated).
OR - All fans have failed.
OR - Only 1 fan operating and
the internal temperature is
40 °C or above.
1. Switch Off immediately.
2. Check for airflow restrictions.
3. Check Power Supply module
faults.
4. Check for excessive local
temperatures.