Juniper ACX7100-32C Hardware Manual page 28

Fan Status LEDs on ACX7100-32C Routers
You can check the status of the fan modules by using the show system alarms command or by examining
the LEDs next to each fan module.
On the ACX7100-32C routers, the fan module LEDs are located on the chassis next to the fan module
slot. Figure 12 on page 20
Figure 12: Fan Status LEDs on ACX7100-32C Routers
1 Fan status LEDs
—
Table 7 on page 20 describes the function of the fan status LED.
Table 7: Fan Status LED on ACX7100-32C Routers
Name
Fan status LED
Under normal operating conditions, the fan modules operate at a moderate speed. Temperature sensors
in the chassis monitor the temperature within the chassis.
shows the location of the fan module LEDs on an ACX7100-32C router.
Color State
Green On steadily
Red On steadily
Description
The fan module is operating normally.
The system has verified that the module
is engaged, that the airflow is in the
correct direction, and that the fan is
operating correctly.
An error has been detected in the fan
module. Replace the fan module as soon
as possible. Either the fan has failed, or
it is seated incorrectly. To maintain
proper airflow through the chassis, leave
the fan module installed in the chassis
until you are ready to replace it.
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