Troubleshooting
39
4.4.4 Thermal Alarm
Symptom
Cause
Action
1
Ops Panel FAULT
LED AMBER.
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.
