User guide

Troubleshooting
43
4.5.4 Thermal Alarm
4.5.5 Thermal Shutdown
Symptom Cause Action
1 Operator Panel Power
Supply/Cooling LED
AMBER (~ and Fan
Symbol).
2 An AMBER LED on
one or more Power
Supply/Cooling
Modules.
3 Audible Alarm
Sounding.
4 Air temperature exiting
PSU above 55°C.
If the internal temperature
measured in the airflow through
the enclosure exceeds a pre-set
threshold a thermal alarm will
sound.
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 25mm
at the front and 50mm 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.
Symptom Cause Action
1 ALL AMBER LEDs
on the Operator Panel
and on ALL drive bays
illuminated 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) the Enclosure
is programmed to shutdown in
order to protect itself and the disk
drives from damage.
OR - All fans have failed.
OR - Only 1 fan operating and the
internal temperature is 40° C or
above.
1 Check for airflow restrictions.
2 Check Power Supply/Cooling module
faults.
3 Check for excessive local temperatures.
Important: The Enclosure will SHUTDOWN 10 seconds after the above Symptoms are observed. This will
leave the following indications active.
1 STANDBY LED
Illuminated AMBER
2 PSU STATUS LED
illuminated AMBER
3 Enclosure powered off
1 Clear the source of the overheating
2 Leave for a period to cool down.
3 Remove AC Mains power from the enclosure for at least 30 seconds to reset
the shutdown condition
4 Re-start enclosure using normal operating procedure
5 Check for re-occurring cooling faults (especially fan failure).