Juniper EX4600, Hardware Manual

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Removing a Fan Module from an EX4600 Switch
The fan modules in an EX4600 switch 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.
Before you remove a fan module from an EX4600 switch, ensure that you have taken
the necessary precautions to prevent electrostatic discharge (ESD) damage (see
“Prevention of Electrostatic Discharge Damage” on page 120 ).
Ensure that you have the following parts and tools available to remove a fan module
from an EX4600 switch:
• ESD grounding strap
• Antistatic bag or an antistatic mat
To remove a fan module from an EX4600 switch (see Figure 35 on page 177 ):
1.
Place the antistatic bag or the antistatic mat on a flat, stable surface.
2.
Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD
point on the chassis.
3.
Using a Phillips screwdriver, loosen the locking screw (3 or 4 turns).
4.
Grasp the handle on the fan module and squeeze the outside of the handle to release
the module.
WARNING: To avoid injury, do not touch the fan with your hands or any
tools as you slide the fan module out of the chassis—the fan might still
be running.
5.
Pull firmly to slide the fan module halfway out of the chassis.
6.
When the fan stop spinning, slide the fan module completely out of the chassis.
7.
Place the fan module in the antistatic bag or on the antistatic mat placed on a flat,
stable surface.
Copyright © 2014, Juniper Networks, Inc. 176
EX4600 Switch Hardware Guide