Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

 
ON THIS PAGE
 

Maintain the QFX5241-64OD and QFX5241-64QD Cooling System

The fan modules in the QFX5241-64OD and QFX5241-64QD switches are hot-removable and hot-insertable FRUs. You can remove and replace one of the fan modules without powering off the switch or disrupting switching function.

Remove a Fan Module from QFX5241-64OD and QFX5241-64QD Switches

Before you remove a fan module from QFX5241-64OD and QFX5241-64QD switches, 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 QFX5241-64OD and QFX5241-64QD switches:

  • 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

25

2 minutes

35 through 40

30 seconds
  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. Grasp the handle on the fan module and squeeze the outside of the handle to release the module.
    Figure 1: Remove a Fan Module from QFX5241-64OD and QFX5241-64QD Switches Remove a Fan Module from QFX5241-64OD and QFX5241-64QD Switches
    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.
  4. Pull firmly to slide the fan module halfway out of the chassis.
  5. When the fan stops spinning, use your other hand to support the fan module and 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.
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 minor alarm.

Install a Fan Module in QFX5241-64OD and QFX5241-64QD Switches

Before you install a fan module in QFX5241-64OD and QFX5241-64QD switches, ensure that you have taken the necessary precautions to prevent ESD damage.

The fan modules in QFX5241-64OD and QFX5241-64QD switches 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 QFX5241-64OD and QFX5241-64QD switches, the fan module provides AFO or front-to-back airflow.

To install a fan module in QFX5241-64OD and QFX5241-64QD switches (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 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 2: Install a Fan Module in a QFX5241-64OD and QFX5241-64QD Switches Install a Fan Module in a QFX5241-64OD and QFX5241-64QD Switches
    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 QFX5241-64OD and QFX5241-64QD product variant that supports the same airflow type. See Maintain the QFX5241-64OD and QFX5241-64QD Power System for more information.