Removing a Fan Tray from a QFX3500 Device
The fan trays in QFX3500 devices are hot-removable and hot-insertable field-replaceable
units (FRUs): you can remove and replace them without powering off the device or
disrupting device functions.
CAUTION: Replace a failed fan tray with a new fan tray within 1 minute of
removal to prevent chassis overheating. Before removing the fan tray, ensure
you have a replacement fan tray.
Before you remove a fan tray from a QFX3500 device, ensure that you have taken the
necessary precautions to prevent electrostatic discharge (ESD) damage (see “Prevention
of Electrostatic Discharge Damage” on page 192).
Ensure that you have the following parts and tools available to remove a fan tray from
a QFX3500 device:
•
ESD grounding strap
•
Antistatic bag or an antistatic mat
To remove a fan tray from a QFX3500 device (see Figure 121 on page 368):
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. Slide the locking lever toward the handle until it stops.
WARNING: To avoid injury, do not touch the fan with your hands or any
tools as you slide the fan tray out of the chassis—the fan may still be
running.
4. Grasp the handle on the fan tray and pull firmly to slide the fan tray halfway out of
the chassis.
5. When the fans stop spinning, slide the fan tray completely out of the chassis.
6. Place the fan tray in the antistatic bag or on the antistatic mat placed on a flat, stable
surface.
367Copyright © 2012, Juniper Networks, Inc.
Chapter 27: Replacing QFX3500 Components
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