Maintenance and Field Replacement

The Maintenance and Field Replacement section reviews the following topics:

Considerations

Review the following considerations when installing the device.

  • All fans and power supplies are hot swappable.

  • The switch can be running while a power supply is being installed or removed, but the power supply being replaced must not be connected to a power source.

    Note: Saving the switch configuration before replacing a power supply is recommended.
  • All slots must be filled or covered with a blank for operation (even though power supply or fans may not be functional).

  • Before you begin, refer to the Arista Networks document Safety Information and Translated Safety Warnings available at: https://www.arista.com/en/support/product-documentation.

    Note: Refer to the front (Front Panel) and rear (Rear Panel) panel illustrations of your device to locate the appropriate LED, the release lever or handle, and the handle for the power supply and fan modules.

Power Supplies

The following steps are required when removing power supplies from a switch.

 

AC Power Supplies

Removing an AC Power Supply

  1. Ground yourself with an ESD wrist strap.
  2. Power down the power supply to be removed by disconnecting the AC power cable.
  3. Push the power supply release lever and remove the power supply.

Installing an AC Power Supply

You must make space for installing the power supply by removing an existing one (Removing an AC Power Supply).
  1. Remove the replacement power supply from its packaging.
  2. Slide the new power supply into the empty slot.
  3. Slide the new power supply into the switch until the power supply is fully seated and the release lever snaps into place.
  4. Connect the power cord to the power supply.
  5. Verify the LED(s) on the power supply.
    Note: The Power Supply status LED is a steady green for normal operation.
  6. Verify the new power supply operation by issuing the show environment power command. 
    switch#show environment power

    The output of the command lists the power supplies in operation and includes the one you replaced.

DC Power Supplies

Note: Use a three-eighth inch (3/8") hexagon-socket wrench for removing the lug nuts.

Removing a DC Power Supply

Before performing any of the steps, ensure power is removed from DC circuits by turning off the power line servicing the circuits.
Note: Make sure to remove the ground connection last when removing power.
  1. Put on a grounded, anti-static ESD strap.
  2. Disconnect the power cable from the DC power source.
  3. Access the terminal studs by lifting the plastic cover.
  4. Remove the flange locking nuts to each of the terminal studs.
  5. Disconnect the power cable lug from the terminal studs.
  6. Use the power supply release lever to unseat and slide out the power supply.

Installing a DC Power Supply

You must make space for installing the power supply by removing an existing one (Removing a DC Power Supply) from a power supply slot available on the switch. Perform the following steps to install a DC power supply.
  1. Put on a grounded ESD strap.
  2. Unbox the new power supply.
  3. Insert the new power supply into the empty power supply slot.
  4. After you insert the power supply, push gently on the power supply until the power supply is fully seated and locked in place.
  5. Connect the DC-input wires to the appropriate terminals using the specified torque (Table 1) in the following order:
    1. Ground wire to the Protective Earth (PE ) terminal.
    2. Negative source DC cable to the negative (- / -48V) terminal.
    3. Positive (+) source DC cable to the positive (+ / Rtn) terminal.

Fan Modules

Hot swap fans within 30 seconds to prevent the switch from overheating. Ensure that the module you are replacing matches those already installed in the switch.

Removing a Fan Module

The following steps are required when removing or replacing fans from a switch.
  1. Ground yourself with an ESD wrist strap.
  2. Push the fan module release lever and slide the fan module out of the switch.

Installing a Fan Module

You must make space for installing the fan module by removing an existing one Removing a Fan Module).
  1. Remove the replacement fan from its packaging.
  2. Slide the new fan module into the switch until the module is fully seated and the release lever snaps into place.
  3. Verify that the fan module is working normally.
    Note: The fan module status LED should be a steady green for normal operation.