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QFX5700 Fan Tray Maintenance

The QFX5700 chassis has two independent, field-replaceable fan trays. Each fan tray is a hot-removable and hot-insertable field-replaceable unit (FRU), which means that you can remove and replace the fan trays while the router is running. You remove and replace the fan trays without turning off power to the router or disrupting routing functions.

Remove a QFX5700 Fan Tray from the QFX5700 Switch

Before you remove a fan tray:

  • Ensure that you understand how to prevent ESD damage.

  • Ensure that you have the following parts and tools available to remove a fan tray from the QFX5700 router:

    • Electrostatic discharge (ESD) grounding strap

    • Replacement fan tray

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

CAUTION:

Do not remove the fan tray unless you have a replacement fan tray available.
CAUTION:

The JNP5700-FAN fan tray can be removed and replaced while the router is operating. However, the fan tray must be replaced within three minutes of removing the fan tray to prevent overheating of the chassis. If you are removing a JNP5700-FAN in order to access an QFX5700-FEB Forwarding Engine Board (FEB), we recommend that you either perform the necessary work during a maintenance window or reinstate the fan tray within three minutes.
CAUTION:

Do not remove the fan tray unless you have a replacement fan tray available.

Place the fan tray with the handles in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
CAUTION:

A single fan tray can be removed and replaced while the switch is operating. However, if you remove both fan trays at the same time you’ll trigger a thermal alarm and the system will shut down.

To remove a QFX5700 fan tray:

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist and connect the other end of the strap to one of the ESD points on the chassis.
  2. Loosen the four captive screws either by unscrewing with your thumb and forefinger or with a Phillips screwdriver.
  3. Grasp both the handles and pull the fan tray completely out of the chassis. See Figure 1.
    Figure 1: Remove a QFX5700 Fan Tray Remove a QFX5700 Fan Tray
  4. Place the fan tray with the handles in the antistatic bag or on the antistatic mat placed on a flat, stable surface.

Install a QFX5700 Fan Tray

Before you begin to install a fan tray:

  • Ensure that you understand how to prevent ESD damage. .

  • Ensure that you have the following parts and tools available to install a fan tray in a QFX5700 switch:

    • Electrostatic discharge (ESD) grounding strap

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

    • A replacement fan tray

CAUTION:

You can remove and replace the JNP5700-FAN fan tray while the router is operating. However, you must replace the fan tray within three minutes of removing the fan tray, to prevent overheating of the chassis. If you are removing a JNP5700-FAN to access an QFX5700-FEB Forwarding Engine Board (FEB), we recommend that you either perform the necessary work during a maintenance window or replace the fan tray within three minutes of removal.

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 routing functions.

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

To install a QFX5700 fan tray:

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist and connect the other end of the strap to one of the ESD points on the chassis.
  2. Grasp both the handles of the fan tray, 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 with the Phillips screwdriver or your fingers until the screws are finger tight. See Figure 2.
    Figure 2: Install the Fan Tray in a QFX5700 Install the Fan Tray in a QFX5700