Replacing Cooling System Components on the SRX1400 Services Gateway

When the airflow through the chassis is inhibited because of a clogged filter or a fan failure, you must replace the respective component. The cooling system components support hot-swappable functionality.

The following topics provide instructions on how to replace these components:

Replacing the Fan Tray on the SRX1400 Services Gateway

The SRX1400 Services Gateway has one fan tray located in the side of the chassis and can be plugged in from the rear of the chassis. The fan tray contains two fans. The fan tray supports hot-swappable functionality. It weighs about 4.2 lb (1.9 kg).

Note: To prevent overheating, install the replacement fan tray immediately after removing the existing fan tray. We recommend that you reinstall the fan tray within 3 minutes; otherwise, the services gateway temperature exceeds the maximum recommended room temperature, and the device shuts down automatically in 4 minutes.

You can also use the fan tray LED to detect the condition when the fan speed has reduced to a safer value, so that the fan tray can be removed from the device safely.

Table 37 provides the LED indications of the fan tray LED.

Table 37: Fan Tray LED

Color

LED Status

Indicated Condition

Amber

Off

Fans are running and fan tray is functioning normally. Do not remove the fan tray in this condition.

On Steadily

Fans are not running, and fan tray can be removed safely.

Note: This fan tray LED lights only when fans are shut down manually using the CLI command request chassis fan-tray offline.

The fan tray LED does not indicate a fan failure. The FAN LED available on the System I/O Card (SYSIOC) indicates the fan failure status.

Note: The fan tray LED provides additional safety measures. Even though you can remove the fan tray while the fans are still running, we strongly recommend that you wait until the fan tray LED lights steadily amber (indicating that the fans are not running) before you remove the fan tray..

To replace the fan tray:

  1. Use the request chassis fan-tray offline command to shut down the fans. Wait until the system displays Fan Take Offline Successful message and the fan tray LED lights amber (indicating that the fans are not running).
  2. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. For more information about ESD, see Preventing Electrostatic Discharge Damage to the SRX1400 Services Gateway.
  3. Turn the screw to the left on the fan tray door as shown in Figure 33. Open the fan tray door to the right and remove the fan tray door.

    Figure 33: Replacing the Fan Tray—Opening the Fan Tray Door

    Replacing the Fan
Tray—Opening the Fan Tray Door
  4. Wait for the fans to stop spinning completely.

    Warning: To avoid injury, do not proceed until the fans have stopped spinning.

    Warning: The fan tray LED provides additional safety measures. Even though you can remove the fan tray while fans are still running, we that you wait until the fan tray LED lights steadily amber (indicating that the fans are not running) before you remove the fan tray.

  5. After the fans have stopped spinning and the fan tray LED lights steadily, lift upward on the latch at the bottom of the fan tray to release it as shown in Figure 34.

    Figure 34: Removing the Fan Tray from the SRX1400 Services Gateway

    Removing the Fan Tray from
the SRX1400 Services Gateway
  6. Grasp the fan tray and pull it out approximately 6 in. (15 cm).
  7. Place one hand under the fan tray to support it and pull the fan tray completely out of the chassis. Set it aside.
  8. Grasp the replacement fan tray and insert it straight into the chassis until you hear a click, indicating the latch has closed. See Figure 35.

    Figure 35: Installing the Fan Tray into the SRX1400 Services Gateway

    Installing the Fan Tray
into the SRX1400 Services Gateway

    Note: Be sure the fan tray is correctly oriented in the slot, with the latch on the bottom of the vertically aligned fan tray.

  9. Press the fan tray into the chassis about 1 in. (2.5  cm) beyond where the latch closes to engage the power connection.
  10. Reinsert the fan tray door, and close and tighten the captive screw to secure it in the chassis.

    Note: The FAN LED on the System I/O card lights steadily green, indicating that cooling system is operating normally.

Replacing the Cooling System Air Filter on the SRX1400 Services Gateway

Caution: Do not run the services gateway 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 services gateway components.

Note: You can order an air filter kit separately. Contact your Juniper Networks customer service representative for more information. The air filter kit includes a cooling system air filter and four power supply air filters.

The services gateway cooling system has one air filter that installs in the rear of the chassis. The air filter supports hot-swappable functionality.

The air filter is located in the rear of the chassis on the right side. The air filter weighs approximately 0.2 lb (0.09 kg).

To replace the cooling system air filter:

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. For more information about ESD, see Preventing Electrostatic Discharge Damage to the SRX1400 Services Gateway.
  2. Turn the screw to the left on the fan tray door. Open it to the right and remove it. See Figure 36

    Figure 36: Removing the Cooling System Air Filter from the SRX1400 Services Gateway

    Removing
the Cooling System Air Filter from the SRX1400 Services Gateway
  3. Slide the air filter out of the chassis and properly dispose of it.
  4. Locate the up arrow on the replacement filter to ensure that the air filter is right side up.
  5. Slide the air filter straight into the chassis until it stops as shown in Figure 37.

    Figure 37: Installing Cooling System Air Filter from the SRX1400 Services Gateway

    Installing
Cooling System Air Filter from the SRX1400 Services Gateway
  6. Replace the fan tray door and tighten the screw to secure it in the chassis.

Note: The SRX1400 Services Gateway power supply has one air filter located in the front. For information about replacing the power supply air filter, see Replacing the Power Supply Air Filter on the SRX1400 Services Gateway.