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    Replacing the Fan on an NSM4000 Appliance

    The NSM4000 appliance ships with two field-replaceable fans that are hot-swappable. You can remove and replace a fan without powering off the appliance or disrupting any functions.

    When a fan fails, the full cooling load switches to the remaining fan and the red Hardware Fault LED on the front panel of the appliance blinks and an alarm sounds.

    Note: The LEDs on the front panel of the NSM4000 are arranged vertically, as shown in Figure 1.

    Figure 1: NSM4000 Appliance Front Panel Status LEDs

    NSM4000 Appliance
Front Panel Status LEDs
      1
    Power LED
      3
    Hardware Fault LED
      2
    Hard Disk Activity LED
     

    Caution: The NSM4000 appliance should not run on one fan for an extended period of time. Failed fans should be replaced as soon as possible.

    Ensure that you have the following parts and tools available to remove the fan from the appliance chassis:

    • (Optional) Electrostatic discharge (ESD) grounding strap
    • (Optional) An antistatic bag or an antistatic mat

    Removing the Fan

    To remove a fan from an NSM4000 appliance:

    1. (Optional) Place the antistatic bag or antistatic mat on a flat, stable surface.
    2. (Optional) Attach an ESD grounding strap to your bare wrist, and connect the strap to an external ESD point.
    3. Press the latch at the side of the fan, as shown Figure 2 to release the fan.

      Figure 2: Removing a Fan

      Removing a Fan
    4. Pull the fan module out of the chassis.
    5. (Optional) Place the fan module in the antistatic bag or on the antistatic mat placed on a flat, stable surface.

    Installing the Fan

    To install a fan in an NSM4000 appliance:

    1. (Optional) Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to an external ESD point.
    2. Remove the replacement fan module from its antistatic bag.
    3. Insert the replacement fan into the slot for the fan module, as shown in Figure 3, until the latch locks and you hear a clicking sound.

      Figure 3: Installing a Fan

      Installing
a Fan

      When you install a replacement fan, the cooling load is distributed back evenly across both the fans, and the Hardware Fault LED stops blinking and the alarm turns off.

    Published: 2014-10-30