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The fan LED is amber.
There are two main instances
where a fan LED is amber:
•
Fan Failure
- One or more
fans have stopped functioning.
The syslog message:
Fan
failure detected
appears on the screen.
•
Insufficient Cooling
- The fan
LED is amber if the internal
temperature of the switch
exceeds 60 degrees Celsius.
The syslog message:
Temperature exceeds
threshold
appears on the
screen.
These messages are also
appended to the output from the
/
info/sys
command.
Take the following actions if the fan
LED is amber:
•
Ensure that the air circulation
vents on the front, back, and
sides of the switch are free
from obstruction by cables,
panels, rack frames, or other
materials.
•
Ensure that all cooling fans
inside the switch are running.
The fans are located behind
the ventilation grill at the rear
of the switch. If any fan stops
during switch operation,
contact Nortel Networks
customer support.
•
Remember that units in a
closed or multi-unit rack
assembly may have an
operating ambient temperature
higher than the ambient
temperature of the room. The
ambient temperature of an
operating switch must not
exceed 40 degrees Celsius. If
the operating ambient
temperature cannot be lowered
before this maximum is
reached, turn off the switch
and let it cool.
•
It may be necessary to cool the
room to a lower temperature or
provide a fan for greater air
circulation. Resolve the room’s
cooling and circulation
problems before turning the
switch back on.
After taking the above actions,
when the switch comes to normal
temperature, the following
messages appear on the screen:
Temperature OK
(if
temperature previously exceeded
threshold) or
Fan OK
(if a fan had
previously failed). No temperature
or fan information is appended to
the output from
/info/sys
.
Table 13
Installation and Configuration Troubleshooting (continued)
Problem
Possible Cause
Solution