APC 15000 RAID User Manual
Drive Enclosure Troubleshooting
007-5510-002
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8.5.2
Thermal Alarm
8.5.3
Thermal Shutdown
Important
An enclosure will shut down when a critical temperature threshold is exceeded in order to prevent
permanent damage to the disk drives.
permanent damage to the disk drives.
8.6 Dealing with Hardware Faults
Ensure that you have obtained a replacement module of the same type before removing any faulty
module.
module.
Warning
If the drive enclosure subsystem is powered up and you remove any module, replace it
immediately. If the subsystem is used with modules or module blanks missing for more than a
few minutes, the enclosure can overheat, causing power failure and data loss. Such use will
invalidate the warranty.
immediately. If the subsystem is used with modules or module blanks missing for more than a
few minutes, the enclosure can overheat, causing power failure and data loss. Such use will
invalidate the warranty.
• Replace a faulty drive with a drive of the same type and equal or greater capacity.
• All the supplied plug-in PCMs, electronics modules, and blank modules must be in place for the air
to flow correctly around the cabinet.
Symptom
Cause
Action
• Display Panel PCM/
Cooling Fault LED.
• An AMBER LED on
one or more PCMs.
• Audible Alarm
Sounding.
• Air temperature
exiting PCM above
35°C.
35°C.
If the internal temperature
measured in the airflow
through the enclosure exceeds
a pre-set threshold, a thermal
alarm will sound.
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.
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.
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.
Use in a fully enclosed rack
installation is not recommended.
5 If possible, shutdown the enclosure
and investigate the problem before
continuing.
continuing.