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Maintaining the SRX5400 Cooling System

Maintaining the Fan Tray on the SRX5400 Firewall

Purpose

For optimum cooling, verify the condition of the fans.

Action

  • Monitor the status of the fans. A fan tray contains multiple fans that work in unison to cool the firewall components. If one fan fails, the host subsystem adjusts the speed of the remaining fans to maintain proper cooling. A major alarm is triggered when a fan fails, and a minor alarm and major alarm is triggered when a fan tray is removed.

  • To display the status of the cooling system, issue the show chassis environment command.

Note:

The fan numbers are stamped into the fan tray sheet metal next to each fan.

Replacing the SRX5400 Firewall Fan Tray

To replace a fan tray, perform the following procedures in sequence:

Removing the SRX5400 Firewall Fan Tray

Note:

To prevent overheating, install the replacement fan tray immediately after removing the existing fan tray.

To remove the fan tray (see Figure 1):

  1. Attach an ESD grounding strap to your bare wrist, and connect the other end of the strap to an ESD grounding point.
  2. Loosen the captive screws on the fan tray faceplate.
  3. Grasp the fan tray handle and pull it out approximately 1 to 3 inches.
    Warning:

    To avoid injury, keep tools and your fingers away from the fans as you slide the fan tray out of the chassis. The fans might still be spinning.

  4. Press the latch located on the inside of the fan tray to release it from the chassis.
  5. Place one hand under the fan tray to support it and pull the fan tray completely out of the chassis.
Figure 1: Removing the Fan TrayRemoving the Fan Tray

Installing the SRX5400 Firewall Fan Tray

To install the fan tray (see Figure 2):

  1. Attach an ESD grounding strap to your bare wrist, and connect the other end of the strap to an ESD grounding point.
  2. Grasp the fan tray handle and insert it straight into the chassis. Note the correct orientation by the this side up label on the top surface of the fan tray.
  3. Tighten the captive screws on the fan tray faceplate to secure it in the chassis.
Figure 2: Installing the Fan TrayInstalling the Fan Tray

Maintaining the Air Filter on the SRX5400 Firewall

Purpose

For optimum cooling, verify the condition of the air filters.

Action

  • Regularly inspect the air filter. A dirty air filter restricts airflow in the unit, impeding the ventilation of the chassis. The filter degrades over time. Periodically replace the filter in use, as well as spares. We recommend that you replace the filter every six months. Discard used filters, do not attempt to clean and reuse them.

    Note:

    Air filters will not be replaced by Juniper Networks under the Juniper Networks Hardware Replacement Support Plan, you need to purchase them for replacement.

    CAUTION:

    Always keep the air filter in place while the firewall is operating. Because the fans are very powerful, they could pull small bits of wire or other materials into the firewall through the unfiltered air intake. This could damage the firewall components.

  • The shelf life of polyurethane filter varies from two years to five years depending on the storage conditions. Store in a cool, dry, and dark environment. Wrap the media in plastic and store in an environment with relative humidity between 40%- 80% and temperature between 40°F (4° C) to 90°F (32° C). Note that if the material flakes, or becomes brittle when rubbed or deformed, it is no longer usable.

Replacing the SRX5400 Firewall Air Filter

To replace the air filter, perform the following procedures in sequence:

Removing the SRX5400 Firewall Air Filter

CAUTION:

Do not run the firewall for more than a few minutes without the air filter in place.

CAUTION:

Always keep the air filter in place while the device is operating, except during replacement. Because the fans are very powerful, they could pull small bits of wire or other materials into the device through the unfiltered air intake. This could damage the firewall components.

To remove the air filter (see Figure 3):

  1. Attach an ESD grounding strap to your bare wrist, and connect the other end of the strap to an ESD grounding point.
  2. Loosen the captive screws on the air filter cover.
  3. Remove the air filter cover.
  4. Slide the air filter out of the chassis.
Figure 3: Removing the Air FilterRemoving the Air Filter

Installing the SRX5400 Firewall Air Filter

To install the air filter (see Figure 4):

  1. Attach an ESD grounding strap to your bare wrist, and connect the other end of the strap to an ESD grounding point.
  2. Locate the up arrow and ensure that the air filter is right side up.
  3. Slide the air filter straight into the chassis until it stops.
  4. Align the captive screws of the air filter cover with the mounting holes on the chassis.
  5. Tighten the captive screws on the air filter cover.
Figure 4: Installing the Air FilterInstalling the Air Filter