Maintaining QFX10016 Cooling System Components

Removing a QFX10016 Fan Tray

The QFX10016 chassis have two independent, field-replaceable fan trays. Each 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.

Each fan tray is installed vertically on the rear, or FRU-side, of the chassis.

Before you remove a fan tray:

• Ensure you understand how to prevent ESD damage. See Prevention of Electrostatic Discharge Damage.

• Ensure that you have the following parts and tools available to remove a fan tray from a QFX10016 chassis:

  • Electrostatic discharge (ESD) grounding strap

  • Replacement fan tray

  • A Phillips (+) screwdriver, number 1 or 2 (optional), for the captive screws

1. Attach the electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to the ESD point on the rear left side of the chassis. See Figure 1.

   Figure 1: ESD Point on QFX10016 Chassis Rear

   

   1 — ESD point

2. Loosen the four captive screws either by unscrewing with your thumb and forefinger or with a Phillips screwdriver.
3. Grasp the top and bottom handles and pull the fan tray out about 3 in. (7.6 cm). See Figure 2.

   Figure 2: Removing a Fan Tray from a QFX10016 Chassis

   

4. Tilt the top of the fan tray forward.
5. Using both hands, lift the fan tray out of the slot and rest it on a flat surface with the handles to the side.Caution

   Replace a fan tray within three minutes to avoid chassis overheating.

Installing a QFX10016 Fan Tray

The QFX10016 chassis has two independent, field-replaceable fan trays. Each 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.

Before you begin to install a fan tray:

• Ensure you understand how to prevent ESD damage. See Prevention of Electrostatic Discharge Damage.

Ensure that you have the following parts and tools available to install a fan tray in a QFX10016 chassis:

• Electrostatic discharge (ESD) grounding strap

• A Phillips (+) screwdriver, number 1 or 2 (optional), for the captive screws

• A replacement fan tray

1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the rear left side of the chassis. See Figure 3.

   Figure 3: ESD Point for QFX10016 Chassis Rear

   

2. Grasp the top and bottom fan tray handles and align the bottom of the fan tray with the bottom of the fan tray slot.
3. Rest the bottom edge of the fan tray in the slot and slide the fan tray into place so it is fully seated.
4. Tighten the captive screws until finger tight. See Figure 4.

Figure 4: Installing a Fan Tray in a QFX10016 Chassis

Removing a QFX10016 Fan Tray Controller

For each of the two fan trays, there is a fan tray controller. Each controller is a hot-removable and hot-insertable field-replaceable unit (FRU); you can remove and replace one fan tray controller while the switch is running without turning off power to the switch or disrupting switching functions. See Figure 5.

Figure 5: QFX10016 Fan Tray Controller

In order to access a fan tray controller, you must first remove the fan tray. With the fan tray removed, the fan tray controller is installed horizontally above the switch interface boards (SIBs) at the top of the chassis.

Before you remove a fan tray controller:

• Ensure you understand how to prevent ESD damage. See Prevention of Electrostatic Discharge Damage.

Ensure that you have the following parts and tools available to remove a fan tray controller from a QFX10016:

• Electrostatic discharge (ESD) grounding strap

• An electrostatic bag or an antistatic mat

• Replacement fan tray controller

• A Phillips (+) screwdriver, number 1, for the captive screws

1. Remove the fan tray. See Removing a QFX10016 Fan Tray.
2. Loosen the two captive screws on each side of the fan tray controller.
3. Grasp the fan tray controller and pull it straight out of the slot. See Figure 6.

   Figure 6: Removing a QFX10016 Fan Tray Controller

   

4. Place the fan tray controller in an electrostatic bag or on an antistatic mat.

Installing a QFX10016 Fan Tray Controller

For each of the two fan trays, there is a fan tray controller. Each controller is a hot-removable and hot-insertable field-replaceable unit (FRU); you can remove and replace one fan tray controller while the switch is running without turning off power to the switch or disrupting switching functions. See Figure 7.

Figure 7: Fan Tray Controller

In order to access a fan tray controller, you must first remove the associated fan tray. With the fan tray removed, the fan tray controller is installed horizontally above the Switch Interface Boards (SIBs) at the top of the chassis.

Before you replace a fan tray controller:

• Ensure you understand how to prevent ESD damage. See Prevention of Electrostatic Discharge Damage.

• You have removed the associated fan tray and fan tray controller. See Removing a QFX10016 Fan Tray and Removing a QFX10016 Fan Tray Controller.

Ensure that you have the following parts and tools available to install a fan tray controller into a QFX10000:

• Electrostatic discharge (ESD) grounding strap

• Replacement fan tray controller

• A Phillips (+) screwdriver, number 1 for the captive screws

1. Remove the replacement fan tray controller from the electrostatic bag.
2. Carefully slide the fan tray controller into the fan tray controller slot until it is flush with the mounting holes. See Figure 8.

   Figure 8: Replacing a QFX10016 Fan Tray Controller

   

3. Using a Phillips screwdriver, tighten the captive screws for the fan tray controller.
4. Replace the fan tray. See Installing a QFX10016 Fan Tray.