Figure 27: Fan Module Used in an EX4300 Switch
You must remove only one fan module at a time for replacement from the rear panel of
the chassis. The switch continues to operate for a limited period of time (30 seconds)
during the replacement of the fan module without thermal shutdown.
NOTE:
Both the fan modules must be installed for optimal functioning of
the switch.
The fan modules are available in two models that have different airflow
directions—back-to-front (air enters through the back of the switch), indicated by label
AIR IN (AFI)
, and front-to-back (air exhausts through the back of the switch), indicated
by label
AIR OUT (AFO)
.
Table 24 on page 42
lists the available fan module models and
the direction of airflow in them.
NOTE:
The 32-port EX4300 switches support fan modules and power
supplies with the
AIR OUT (AFO)
label only.
Table 24: Fan Modules in EX4300 Switches
Label on the Fan Module
Fan Module
AIR OUT (AFO)
EX4300-FAN
AIR IN (AFI)
EX4300-FAN-AFI
Airflow Direction in EX4300 Switch Models
Table 25 on page 43
shows the direction of airflow in EX4300 switch models as shipped.
Copyright © 2015, Juniper Networks, Inc.
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EX4300 Switch Hardware Guide
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