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Maintaining the NFX350 Cooling System

 

Removing a Fan Module from an NFX350 Device

The fan module in NFX350 devices is a hot-removable and hot-insertable field-replaceable unit (FRU) installed in the rear panel of the device. You can remove and replace it without powering off the device or disrupting device functions.

Ensure that you have the following parts and tools available:

  • Phillips (+) screwdriver, number 2

  • An antistatic bag or an antistatic mat

  • A replacement fan module

Note

The fan module slots are at the left end of the rear panel on 24-port and 48-port devices, and at the right end on 32-port devices. Figure 1 shows how to remove a fan module from 24- port or 48-port devices. The procedure is the same for 32-port devices.

  1. Place the antistatic bag or the antistatic mat on a flat, stable surface.
  2. Loosen the captive screws on the front faceplate of the fan module by using your fingers. If you are unable to loosen the captive screws by using your fingers, use 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 device—the fan might still be running.

  3. Grasp the handle on the fan module and pull it firmly to slide the fan module out of the device.
  4. Place the fan module in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
  5. Install the replacement fan.
  6. Tighten the captive screws on the faceplate of the fan module by using your fingers. If you are unable to tighten the captive screws by using your fingers, use the screwdriver.
Figure 1: Removing a Fan Module from an NFX350 Device
Removing a Fan
Module from an NFX350 Device
Note

Both the fan modules must be installed and operational for optimal functioning of the device.

Installing a Fan Module in an NFX350 Device

The fan modules in an NFX350 device are hot-removable and hot-insertable field-replaceable units (FRUs): you can remove and replace them without powering off the device or disrupting device functions.

Caution

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

Note

The fan module provides FRU-to-port or port-to-FRU airflow depending on the NFX350 device you purchase. In legacy devices, or devices with an LCD, this airflow is called front to back and back to front.

Before you install a fan module in an NFX350 device, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

To install a fan module in an NFX350 device (see Figure 2):

  1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the device.
  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 management panel of the device and slide it in until it is fully seated.Caution

    Damage can occur if you attempt to install a fan module into a device with a different airflow direction. Compare the NFX350 device with the airflow marking on the handle to ensure that you are installing a fan module with the same airflow direction as the device. The fan modules are designed so that they can only be inserted into the NFX350 device that supports the same airflow type.

  4. Using a Phillips screwdriver, turn the locking screw until it is tight.
Figure 2: Installing a Fan Module in an NFX350 Device
Installing a
Fan Module in an NFX350 Device