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Maintain the QFX5241-32OD-DO-T1 Cooling System

The fan modules in the QFX5241-32OD-T1 switch are hot-removable and hot-insertable Field-Replaceable Units (FRUs), allowing them to be removed and installed without powering down the switch or disrupting normal switching operations. Fan modules can also be replaced when the switch is powered off and off-rack.

The ORv3-compliant QFX5241-32OD-DO-T1 switches support the replacement of field replaceable units (FRUs) such as fans. For more information on the fan module, redundancy support, and airflow, see QFX5241-32OD Cooling System. The fan can be replaced at the following operational states:

  • On rack (fully installed)—You can replace the fan while the switch is installed on the ORv3 rack. The switch-tray assembly is powered by the busbar in this state and fully operational.
  • Off rack, on tray—You can replace the PSU and fan after the switch is removed from the ORv3 rack, but still attached to the tray. The switch is not operational in this state.

Remove a Fan Module from QFX5241-32OD-DO-T1 Switch While Operational

We ship the QFX5241-32OD-T1 switch from the factory with seven fan modules.

Before you remove a fan module from QFX5241-32OD-T1 switch, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage.

CAUTION:

To ensure proper airflow, keep a failed fan module in place until you have a replacement fan module at hand. Do not run the device with an open fan tray slot for an extended amount of time.

Ensure that you have the following parts and tools available to remove the fan module from QFX5241-32OD-T1 switch:

  • ESD grounding strap

  • Antistatic bag or an antistatic mat

  • Replacement fan module

Based on the ambient temperature, the time allowed to replace a fan module in the chassis varies.

Table 1: Time Allowed to Replace a Fan Module

Ambient Temperature (°C)

Duration

40

2 minutes
  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 rack.
  3. Loosen and remove the thumbscrews on both sides of the chassis to unfasten the switch from the switch-tray assembly.
    Figure 1: Remove the Thumbscrews Remove the Thumbscrews
  4. Slide the switch chassis toward the front until the fan module is accessible.
    Note: You must slide the chassis to the front in the switch-tray assembly by approximately 150 mm to ensure that the fans are accessible.
    Figure 2: Slide the Switch Slide the Switch
  5. Grasp the handle on the fan module and squeeze the outside of the handle to release the module.
    Figure 3: Remove the Fan Module from QFX5241-32OD-T1 Switch While Operational Remove the Fan Module from QFX5241-32OD-T1 Switch While Operational
    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.
  6. Pull firmly to slide the fan module halfway out of the chassis.
  7. When the fan stops spinning, use your other hand to support the fan module and slide the fan module completely out of the chassis.
  8. Place the fan module in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
Note:

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

Remove a Fan Module from QFX5241-32OD-DO-T1 Switch While Off-Rack

We ship the QFX5241-32OD-T1 switch from the factory with seven fan modules.

Before you remove a fan module from QFX5241-32OD-T1 switch, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage.

Ensure that you have the following parts and tools available to remove the fan module from QFX5241-32OD-T1 switch:

  • ESD grounding strap

  • Antistatic bag or an antistatic mat

  • Replacement fan module

  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 rack.
  3. Place the switch on a flat, stable, and clean surface.
  4. Grasp the handle on the fan module and squeeze the outside of the handle to release the module.
    Figure 4: Remove the Fan Module from QFX5241-32OD-T1 Switch While Off-Rack Remove the Fan Module from QFX5241-32OD-T1 Switch While Off-Rack
  5. Pull firmly to slide the fan module halfway out of the chassis.
  6. Place the fan module in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
Note:

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

Install a Fan Module in QFX5241-32OD-DO-T1 Switches While Operational

Before you install a fan module in QFX5241-32OD-T1 switch, ensure that you have taken the necessary precautions to prevent ESD damage.

The fan modules in the QFX5241-32OD-T1 switch are hot-removable and hot-insertable FRUs. You can remove and replace them without powering off the switch or disrupting switch functions.

CAUTION:

To ensure proper airflow, keep a failed fan module in place until you have a replacement fan module at hand. Do not run the device with an open fan tray slot for an extended amount of time.
Note:

For the QFX5241-32OD-T1 switch, the fan module provides AFO or front-to-back airflow.

To install a fan module in QFX5241-32OD-T1 switch:

  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 rack.
  2. Take care not to touch the connectors as you remove the fan module from its bag.
  3. Loosen and remove the thumbscrews on both sides of the chassis to unfasten the switch from the switch-tray assembly.
    Figure 5: Remove the Thumbscrews Remove the Thumbscrews
  4. Slide the switch chassis toward the front until the fan module is accessible.
    Note: You must slide the chassis to the front in the switch-tray assembly by approximately 150 mm to ensure that the fans are accessible.
    Figure 6: Slide the Switch Slide the Switch
  5. With the chassis tray slid toward the front, align the module with the open slot and slide it in until it is fully seated.
    Figure 7: Install a Fan Module in a QFX5241-32OD-T1 Switch While Operational Install a Fan Module in a QFX5241-32OD-T1 Switch While Operational
    CAUTION:

    Damage can occur if you attempt to install a fan module into a chassis with a different airflow direction. Compare the switch product variant 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 QFX5241-32OD-T1 product variant that supports the same airflow type. See Maintain the QFX5241-32OD Power System for more information.
  6. Slide the switch-tray assembly back into place.
    Figure 8: Slide the Switch-Tray into Position Slide the Switch-Tray into Position
  7. Tighten the thumbscrews on both sides of the chassis.
    Figure 9: Tighten the Thumbscrews Tighten the Thumbscrews

Install a Fan Module in QFX5241-32OD-DO-T1 Switches While Off-Rack

Before you install a fan module in QFX5241-32OD-T1 switch, ensure that you have taken the necessary precautions to prevent ESD damage.

Note:

For the QFX5241-32OD-T1 switch, the fan module provides AFO or front-to-back airflow.

To install a fan module in QFX5241-32OD-T1 switch:

  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 rack.
  2. Take care not to touch the connectors as you remove the fan module from its bag.
  3. Align the module with the open slot and slide it in until it is fully seated.
    Figure 10: Install a Fan Module in the QFX5241-32OD-T1 Switch While Off-Rack Install a Fan Module in the QFX5241-32OD-T1 Switch While Off-Rack
    CAUTION:

    Damage can occur if you attempt to install a fan module into a chassis with a different airflow direction. Compare the switch product variant 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 QFX5241-32OD-T1 product variant that supports the same airflow type. See Maintain the QFX5241-32OD Power System for more information.