a) Loosen the captive screws on the fan tray by turning them counterclockwise, using a flat-blade or number 1 Phillips
screwdriver if required.
b) Grasp the captive screws of the fan tray and pull it outward.
c) Pull the fan tray clear of the chassis and set it on an antistatic surface or repack it in packing materials.
Step 2 Install the replacement fan tray as follows:
a) Hold the fan tray with the sheet metal flange holding the connector on the bottom.
b) Place the fan tray into the front chassis cavity so it rests on the chassis, and then push the fan tray into the chassis as
far as it can go until the captive screw makes contact with the chassis.
c) Tighten the captive screw.
d) Listen for the fans if the device is powered on. You should immediately hear them operating. If you do not hear them,
ensure that the fan tray is inserted completely in the chassis and the faceplate is flush with the outside surface of the
chassis.
e) Verify that the LED is green. If the LED is not green, one or more fans are faulty. If this problem occurs, contact
your customer service representative for a replacement part.
Replacing a 1 (RU) Fan Module
The fan module is designed to be removed and replaced while the system is operating without causing an
electrical hazard or damage to the system if the replacement is performed within one minute.
If you do not have the appropriate replacement fan module, leave the original fan module in its slot to preserve
the designed airflow for the switch until you have the replacement fan module. The module number can be
found on the chassis.
Statement 263—Fan Warning
The fans might still be turning when you remove the fan assembly from the chassis. Keep fingers, screwdrivers,
and other objects away from the openings in the fan assembly's housing.
Warning
Before you begin
• Verify that you have an ESD wrist strap or other device to prevent ESD damage for components that
you touch.
• Verify that you have an antistatic surface or bag for placing the fan module that you remove from the
chassis.
• Verify that the replacement fan module has the correct direction of airflow (it has the same coloring as
the other fan and power supply modules in the same chassis).
Step 1 Attach an ESD wrist strap or other ESD device to your body and an earth ground to prevent ESD damage.
You can attach the ESD device to any earth ground or grounded object, such as a grounded rack or ground connection
on a chassis.
Step 2 Remove the fan module that you are replacing as follows:
Cisco Nexus 3000 Series Hardware Installation Guide
60
Replacing Modules
Replacing a 1 (RU) Fan Module
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