Four fan trays install vertically on the left front of the chassis and four on the right front
of the chassis. Handles and captive screws on the two cover panels on each side of the
chassis facilitate handling and securing of the fan trays in the chassis.
Before you remove a fan tray, ensure that you understand how to prevent 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 QFX3008-I Interconnect device:
•
Electrostatic discharge (ESD) grounding strap
•
Replacement fan tray
•
Phillips (+) screwdriver, number 2
CAUTION: The fan trays can be removed and replaced while the QFX3008-I
Interconnect device is operating. However, you must replace the fan tray
within 2 minutes of removing the fan tray to prevent overheating of the
chassis.
To remove a fan trayfrom a QFX3008-I Interconnect device (see Figure 102 on page 334):
1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD
point on the chassis.
2. Unscrew the captive screw, located at the top of each cover panel, counterclockwise
using your fingers. If you cannot easily unscrew the captive screw with your fingers,
use the screwdriver.
3. Hold the screw on the cover panel with one hand while holding the handle with the
other. Pull firmly on the screw to detach the cover panel.
4. Pull on the small handle to slide the fan tray out about 5 in. (13 cm) out of the chassis.
WARNING: There is no fan guard on the fans. Be careful to keep your
fingers clear of the moving fan blades when you are removing the fan tray.
To avoid injury, do not touch the fans with your hands or any tools as you
slide the fan tray out of the chassis—the fans might still be spinning.
CAUTION: Do not attempt to pull the fan tray out by the air filter tab,
located in the center of the module. You can damage the air filter.
5. Wait for approximately 15 seconds to allow all the fans to stop spinning.
6. Slide the fan tray completely out of the chassis, being careful to use your other hand
to support the weight.
333Copyright © 2012, Juniper Networks, Inc.
Chapter 26: Replacing QFX3008-I Components
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