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Maintaining the ACX7100-48L Fan Modules

Remove a Fan Module from an ACX7100-48L Router

Before you remove a fan module from an ACX7100-48L router, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

Ensure that you have the following parts and tools available to remove a fan module from an ACX7100-48L router:

  • ESD grounding strap

  • Antistatic bag or an antistatic mat

  • Phillips (+) screwdriver, number 2

The fan modules in ACX7100-48L routers are hot-removable and hot-insertable field replaceable units (FRUs): you can remove and replace them without powering off the router or disrupting routing functions.

CAUTION:

Replace a failed fan module with a new fan module within 1 minute of removal to prevent chassis overheating. Before removing the fan module, ensure that you have a replacement fan module at hand.

To remove a fan module from an ACX7100-48L router (see Figure 1):

  1. Place the antistatic bag or the antistatic mat on a flat, stable surface.
  2. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to the ESD point on the chassis.
  3. Using a Phillips screwdriver, loosen the locking screw (3 or 4 turns).
  4. Grasp the handle on the fan module and pull firmly to slide the fan module halfway out of the chassis.
    Warning:

    To avoid 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.

  5. When the fan stops spinning, slide the fan module completely out of the chassis.
  6. Place the fan module in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
Figure 1: Remove a Fan Module from an ACX7100-48L RouterRemove a Fan Module from an ACX7100-48L Router
Note:

When you remove a fan module, the CLI message Fan/Blower is Absent is logged in the system log, and Junos OS raises a major alarm.

Install a Fan Module in an ACX7100-48L Router

Before you install a fan module in an ACX7100-48L router, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

The fan modules in an ACX7100-48L router are hot-removable and hot-insertable field replaceable units (FRUs): you can remove and replace them without powering off the router or disrupting routing functions.

CAUTION:

Replace a failed fan module with a new fan module within 1 minute of removal to prevent chassis overheating. Before removing the fan module, ensure that you have a replacement fan module at hand.

Note:

The fan module provides port-to-FRU airflow (AO) or FRU-to-port (AI) airflow depending on the product model that you purchase.

Ensure that you have the following parts and tools available to install a fan module in an ACX7100-48L router:

  • ESD grounding strap

  • Antistatic bag or an antistatic mat

  • Phillips (+) screwdriver, number 2

To install a fan module in an ACX7100-48L router (see Figure 2):

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to the ESD point on the chassis.
  2. Taking care not to touch the connectors, remove the fan module from its bag.
  3. Align the module with the open slot on the rear panel of the chassis and slide it in until it is fully seated.
    CAUTION:

    Damage can occur if you attempt to install a fan module into a chassis with a different airflow direction. Compare the router product model with the airflow marking on the handle to ensure that you are installing a fan module with the same airflow direction as the chassis. The fan modules are designed so that they can only be inserted into the ACX7100-48L product model that supports the same airflow type. See Cooling System and Airflow in ACX7100-48L Routers for more information.

  4. Using a Phillips screwdriver, turn the locking screw until it is tight.
Figure 2: Install a Fan Module in an ACX7100-48L RouterInstall a Fan Module in an ACX7100-48L Router

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