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Maintaining the EX8216 Cooling System

 

Removing a Fan Tray from an EX8216 Switch

An EX8216 switch has two field-replaceable fan trays. Both fan trays are hot-removable and hot-insertable field-replaceable units (FRUs); 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.

Both fan trays install vertically on the left front of the chassis. Handles on the front faceplate of each fan tray facilitate handling of the fan trays. There is a spring-loaded latch on the base of each fan tray that is used to latch the fan tray into the chassis.

Before you remove a fan tray:

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 trays can be removed and replaced while the switch is operating. However, each 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 EX8216 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.

  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 EX8216 Switch
Removing a Fan Tray from
an EX8216 Switch

Installing a Fan Tray in an EX8216 Switch

An EX8216 switch has two fan trays. Both fan trays are hot-insertable and hot-removable field-replaceable units (FRUs); you can remove and replace them while the switch is running without turning off power to the switch or disrupting switching functions. Each fan tray contains nine fans.

Both fan trays install vertically on the left front of the chassis. Handles on the front faceplate of each fan tray facilitate handling of the fan trays. There is a spring-loaded latch on the base of each fan tray that is used to latch the fan tray into the chassis.

Before you begin to install a fan tray:

Ensure that you have the following parts and tools available to install a fan tray in an EX8216 switch:

  • Electrostatic discharge (ESD) grounding strap

Caution

The fan trays can be removed and replaced while the switch is operating. However, each fan tray must be replaced within 2 minutes of removing it to prevent the chassis from overheating.



To install a fan tray in an EX8216 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 handle of the fan tray with one hand and support the weight of the tray with the other hand. Align the tray with the fan tray guides on the fan tray slot. Slide in the fan tray until it is fully seated in the chassis.

    You will hear a distinct click sound when the spring-loaded latch locks into the corresponding hole on the strike plate below the fan tray. The latch must be fully engaged in the corresponding hole for the fan tray to be securely installed.

Figure 2: Installing a Fan Tray in an EX8216 Switch
Installing a Fan Tray in
an EX8216 Switch
Note

Both fan trays must be installed in the chassis for normal switch operation.