Juniper EX8208 User manual

Removing a Fan Tray from an EX8208 Switch
An EX8208 switch has a single, field-replaceable fan tray. The fan tray is a
hot-removable and hot-insertable field-replaceable unit (FRU); you can remove and
replace the fan tray while the switch is running without turning off power to the
switch or disrupting switching functions.
CAUTION: Do not remove the fan tray unless you have a replacement fan tray
available.
The fan tray is installed vertically on the left side on the front of the chassis.
Before you remove a fan tray:
■Ensure you understand how to prevent ESD damage. See Prevention of
Electrostatic Discharge Damage on EX Series Switches.
Ensure that you have the following parts and tools available to remove a fan tray
from an EX8208 switch chassis:
■Electrostatic discharge (ESD) grounding strap
■Replacement fan tray
CAUTION: The fan tray can be removed and replaced while the switch is operating.
However, the fan tray must be replaced within 2 minutes of removing the fan tray
to prevent overheating of the chassis.
To remove a fan tray from an EX8208 switch chassis (see Figure 1):
1. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist, and
connect the strap to the ESD point on the chassis.
2. Pull the spring-loaded latch, located at the base of the fan tray, upwards until
the latch is completely free from the corresponding hole on the strike plate.
3. Hold the handle of the fan tray with one hand while holding the latch up with
the other. Pull firmly on the handle to slide the fan tray 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.
Removing a Fan Tray from an EX8208 Switch ■1

4. Wait for approximately 15 seconds to allow all the fans to stop spinning.
5. Release the latch and use that hand to support the weight of the fan tray. Slide
the fan tray completely out of the chassis.
Figure 1: Removing a Fan Tray from an EX8208 Switch
Related Topics Installing a Fan Tray in an EX8208 Switch■
■Cooling System and Airflow in an EX8208 Switch
■Field-Replaceable Units in an EX8208 Switch
Published: 2009-10-08
2■Removing a Fan Tray from an EX8208 Switch