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Replacing Modules
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Replacing a 4 (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.
Warning
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.
Before you begin
• Verify that you have an ESD wrist strap or other device to prevent ESD damage for components that
• Verify that you have an antistatic surface or bag for placing the fan module that you remove from the
• Verify that the replacement fan module has the correct direction of airflow (it has the same coloring as
Step 1
Attach an ESD wrist strap or other ESD device to your body and an earth ground to prevent ESD damage.
Replacing a 4 (RU) Fan Module, on page 25
Replacing an AC Power Supply, on page 26
Replacing a DC Power Supply, on page 27
Replacing a High Voltage (HVAC/HVDC) Power Supply, on page 28
Installing or Replacing a Line-Card Expansion Module (LEM), on page 30
Replacing a CPU Module, on page 31
you touch.
chassis.
the other fan and power supply modules in the same chassis).
5
C H A P T E R
Cisco Nexus 3400-S Hardware Installation Guide
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