Be sure that the airflow direction of the new fan module matches the airflow direction of the other fan and
AC power supply modules already installed in the chassis. Port-side intake airflow is indicated with burgundy
or green coloring, and port-side exhaust airflow is indicated with blue or gray coloring. Power supplies
with dual-direction airflow (airflow direction is set by the fan modules) have white coloring.
Note
c) Position the fan module in front of the open fan slot (be sure that the backside of the module with the electrical
connectors is positioned to enter the slot first) and slide the module all the way into the chassis until its front side
comes in contact with the chassis. For the last 0.2 inches (0.5 cm), carefully mount the module onto the chassis
connectors by pushing more firmly, but do not force the module if it does not move further (excessive force can
damage the connectors).
If you are not able to push the module all the way into the slot, carefully slide the module out of the slot
and check its electrical connectors for damage. If damaged, contact Cisco Technical Assistance for help.
If undamaged, repeat this step to reinstall the module.
Note
d) Verify that the STS LED turns on and becomes green.
If the STS LED does not turn on, slide the module out of the chassis, and visually check the electrical connectors on
the back side of the chassis for damage. If damaged, contact Cisco Technical Assistance for help. If undamaged,
repeat the previous step to reinstall the module.
e) Secure the fan module to the chassis by screwing in the captive screw to the chassis. Tighten the screw to 5 to 7 in-lb
(0.56 to 0.79 N·m).
Replacing a Power Supply Module
The switch requires two power supplies for redundancy. With one power supply providing the necessary
power for operations, you can replace the other power supply during operations so long as the new power
supply has the same airflow direction as the other modules in the chassis.
You can replace a power supply with another supported power supply that has the same power source type
and the same wattage rating as the other installed power supply. Additionally, the airflow direction of the
power supply must match or conform to the airflow direction of the installed fan modules. For the airflow
direction used by the switch, see the coloring of the fan modules.
Removing an AC Power Supply
To remove an AC power supply, you must first disconnect the power cable and then remove the module from
the chassis.
Before you begin
• To replace a power supply during operations, you must have a functioning power supply providing power
to the switch while you replace the other power supply. If there is only one power supply installed in the
switch and you need to replace it, install the new power supply in the open slot and power it up before
removing the original power supply.
• Ensure that the chassis is grounded. For grounding instructions, see
Grounding the Chassis, on page 25
Cisco Nexus 9396TX NX-OS Mode Switch Hardware Installation Guide
36
Replacing Modules
Replacing a Power Supply Module
