Before you remove a bottom 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 bottom fan tray from a QFX3008-I Interconnect device (see Figure 100 on
page 331):
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 counterclockwise using your fingers. If you cannot easily
unscrew the captive screw with your fingers, use the screwdriver.
3. Grasp the handle on the right side of the panel display and gently pull the fan tray
toward you 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.
4. Wait for approximately 15 seconds to allow all the fans to stop spinning.
5. Slide the fan tray completely out of the chassis.
Copyright © 2012, Juniper Networks, Inc.330
QFX3000 Hardware Documentation
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