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Maintaining the SRX4600 Cooling System

 

Maintaining the Fan Modules on the SRX4600 Services Gateway

Purpose

For optimum cooling, verify the condition of the fan modules.

Action

  • Monitor the status of the fan modules. All the fan modules work in unison to cool the services gateway. If one fan module fails, the redundant fan module acts as a backup. A major alarm is triggered when a fan fails, and a minor alarm and major alarm is triggered when a fan module is removed. We recommend that you replace the fan module immediately to maintain proper cooling.

  • To display the status of the cooling system, issue the show chassis environment command. The output shown below is an example.

    user@host> show chassis environment
Note

The fan module numbers 0 to 4 are labeled on the sheet metal of services gateway.

Replacing the SRX4600 Services Gateway Fan Module

Each fan module is a field-replaceable unit (FRU) installed in the rear panel of the SRX4600 Services Gateway. You can remove and replace the fan modules without powering off the services gateway or disrupting services gateway functions.

Note

All the fan modules must be installed and operational for optimal functioning of the services gateway.

Removing the SRX4600 Services Gateway Fan Module

You can remove a fan module without powering off the services gateway or disrupting services gateway functions.

Note

Once you remove the faulty fan module, make sure you install a working fan module within two minutes.

Ensure that you have the following tools and parts available:

  • Phillips (+) screwdriver, number 1

  • An antistatic bag or an antistatic mat

  • A replacement fan module

  • Electrostatic discharge (ESD) grounding strap

To remove the fan module (see Figure 1):

  1. Attach an ESD grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
  2. Place the antistatic bag or the antistatic mat on a flat, stable surface.
  3. Loosen the captive screw on the front faceplate of the fan module by using the screwdriver.Warning

    To prevent injury, do not touch the fan with your hands or any tools as you slide the fan module out of the chassis—the fan might still be running.

  4. Grasp the handle on the fan module and pull it firmly to slide the fan module out of the chassis.
  5. Place the fan module in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
Figure 1: Removing a Fan Module
Removing a Fan Module

Installing the SRX4600 Services Gateway Fan Module

You can install a fan module without powering off the services gateway or disrupting services gateway functions.

Ensure that you have the following tools and parts available:

  • ESD grounding strap

  • Phillips (+) screwdriver, number 1

To install the fan module, see (Figure 2):

  1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
  2. Remove the fan module from its bag.
  3. Hold the handle of the fan module with one hand and support the weight of the module with the other hand. Place the fan module in the fan module slot on the rear panel of the services gateway and slide it in until it is fully seated.
  4. Tighten the captive screws on the faceplate of the fan module by using the screwdriver.
Figure 2: Installing a Fan Module
Installing a Fan
Module
Note

If you have a Juniper J-Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/ . Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.