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Maintaining the Cooling System in an EX4500 Switch

 

Removing a Fan Tray from an EX4500 Switch

An EX4500 switch has a single 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 horizontally on the rear of the chassis.

Before you remove a fan tray:

Ensure that you have the following parts and tools available to remove a fan tray from the switch chassis:

  • Electrostatic discharge (ESD) grounding strap

  • Replacement fan tray

  • An antistatic bag or an antistatic mat



Caution

The fan tray can be removed and replaced while the switch is operating. However, the fan tray must be replaced within 30 seconds of removing the fan tray to prevent overheating of the chassis.

To remove a fan tray from the switch chassis (see Figure 1):

  1. Place the antistatic bag or the antistatic mat on a flat, stable surface.
  2. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
  3. Squeeze both handles of the fan tray to release the latches that lock the fan tray in the chassis.Warning

    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. Grasp the handles on the fan tray and pull firmly to slide the fan tray halfway out of the chassis.
  5. When the fan stops 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.
Figure 1: Removing a Fan Tray from an EX4500 Switch
Removing a Fan Tray from
an EX4500 Switch

Installing a Fan Tray in an EX4500 Switch

An EX4500 switch has a single fan tray. The fan tray is a hot-insertable and hot-removable 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.

The fan tray installs horizontally on the rear of the chassis. Handles on each side of the front faceplate facilitate handling of the fan tray.

Before you begin to install a fan tray:

Ensure that you have the following parts and tools available to install a fan tray in the switch:

  • Electrostatic discharge (ESD) grounding strap

Caution

The fan tray can be removed and replaced while the switch is operating. However, the fan tray must be replaced within 30 seconds of removing the fan tray to prevent the chassis from overheating.



To install a fan tray in an EX4500 switch (see Figure 2):

  1. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
  2. Hold the handles of the fan tray and align the tray with the fan tray guides on the fan tray slot. Note

    Ensure that the power supply labels, 1 and 0, are on the left side corners of the fan tray.

  3. Slide in the fan tray until it is fully seated in the chassis.
Figure 2: Installing a Fan Tray in an EX4500 Switch
Installing a Fan Tray
in an EX4500 Switch