Juniper EX4300

CHAPTER 15
Replacing Cooling System Component
•
Installing a Fan Module in an EX4300 Switch on page 229
•
Removing a Fan Module from an EX4300 Switch on page 231
Installing a Fan Module in an EX4300 Switch
Each fan module is a hot-removable and hot-insertable field-replaceable unit (FRU)
installed in the rear panel of the switch: You can remove and replace it without powering
off the switch or disrupting switch functions.
CAUTION: Do not mix:
•
Fan modules with different airflow labels (AIR IN (AFI) and AIR OUT (AFO))
in the same chassis.
•
Power supplies with different airflow labels (AIR IN (AFI) and AIR OUT
(AFO)) in the same chassis.
•
Power supplies and fan modules with different airflow labels (AIR IN (AFI)
and AIR OUT (AFO)) in the same chassis.
•
AC and DC power supplies in the same chassis.
Before you install a fan module in the switch:
•
Ensure you understand how to prevent electrostatic discharge (ESD) damage. See
“Prevention of Electrostatic Discharge Damage” on page 313.
Ensure that you have the following parts and tools available to install a fan module in
the switch chassis:
•
ESD grounding strap
•
Phillips (+) screwdriver, number 2
229Copyright © 2017, Juniper Networks, Inc.