Juniper QFX10002 Hardware Manual page 132

The fan modules in QFX10002 models 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 one minute of
removal to prevent chassis overheating. Before removing the fan module, ensure you
have a replacement fan module at hand.
To remove a fan module from a QFX10002 switch (see
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 stops 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.
Figure 44: Removing a Fan Module from QFX10002 Models
NOTE: When a fan module is removed, the CLI message Fan/Blower is Absent is logged in the
system log, and the system raises a minor alarm.
Figure 44 on page 123):
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