Juniper QFX5110, Hardware Manual

Page: 125 / 222

CHAPTER 13
Replacing Cooling System Components
• Installing a Fan Module in a QFX5110 on page 105
• Removing a Fan Module from a QFX5110 on page 106
Installing a Fan Module in a QFX5110
The fan modules in a QFX5110 are hot-removable and hot-insertable field-replaceable
units (FRUs): you can remove and replace them without powering off the switch or
disrupting switch functions.
CAUTION: Replace a failed fan module with a new fan module within 1 minute
of removal to prevent chassis overheating. Before removing the fan module,
ensure you have a replacement fan module at hand.
NOTE: The fan module provides FRU-to-port or port-to-FRU airflow,
depending on the switch product SKU you purchase. In legacy switches, or
switches with an LCD, this airflow is called front to back and back to front.
Before you install a fan module in a QFX5110, ensure that you have taken the necessary
precautions to prevent electrostatic discharge (ESD) damage (see
“Prevention of
Electrostatic Discharge Damage” on page 182 ).
To install a fan module in a QFX5110 (see Figure 40 on page 106 ):
1.
Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD
point on the chassis.
2.
Taking care not to touch the connectors, remove the fan module from its bag.
3.
Align the module with the open slot on the management panel of the chassis and
slide it in until it is fully seated.
105 Copyright © 2017, Juniper Networks, Inc.