Juniper ACX5048, Руководство по оборудованию

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Figure 16: Air Out Airflow Through 2 U ACX5096 Chassis
Fan Module Status
You can check the status of fan modules through the show system alarms command or by looking at the
LEDs next to each fan module.
Each router has a Status LED (labeled ST) for each fan module on the left side of the corresponding fan
module slot. It indicates the status of all the fan modules. Table 14 on page 63 describes the Status LED
on the fan module in an ACX5000 router.
Table 14: Fan Module LED
Description LED State
The individual fan module is present. After the hardware senses the fan module, software
ensures the airflow is consistent with the other fan modules and that it is functioning
correctly.
Solid Green
Indicates one of the following:
•
The fan module is not present.
•
The fan module is not functioning normally.
Blinking Amber
Under normal operating conditions, the fan modules operate at a moderate speed. Temperature sensors
in the chassis monitor the temperature within the chassis.
The system raises an alarm if a fan module fails or if the ambient temperature inside the chassis rises above
the acceptable range. If the temperature inside the chassis rises above the threshold temperature, the
system shuts down automatically.
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