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Maintain the QFX5241-64OD and QFX5241-64QD Power System

QFX5241-64OD and QFX5241-64QD power supply units (PSUs) are hot-removable and hot-insertable FRUs. You can replace PSUs without powering off the switch or disrupting the switching function.

Remove a Power Supply Unit from QFX5241-64OD and QFX5241-64QD Switches

We ship the AC and DC variants of QFX5241-64OD and QFX5241-64QD switches from the factory with two power supply units (PSUs) each.

Before you remove a PSU from QFX5241-64OD and QFX5241-64QD switches, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage.

Ensure that you have the following parts and tools available to remove a PSU from QFX5241-64OD and QFX5241-64QD switches:

  • ESD grounding strap

  • Antistatic bag or an antistatic mat

To remove a PSU from the QFX5241-64OD and QFX5241-64QD switches:

  1. Place the antistatic bag or the antistatic mat on a flat, stable surface.
  2. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to the ESD point on the rack.
    Note:

    If only one PSU is installed in your QFX5241-64OD and QFX5241-64QD switches, you need to power off the switch before removing the PSU. See Power Off QFX5241-64OD and QFX5241-64QD Switches.
  3. Disconnect power to the switch.

    If the power source outlet (AC or DC) has a power switch, set it to the off (O) position. If the power source outlet does not have a power switch, gently pull out the plug end of the power cord connected to the power source outlet.

  4. Remove the power cord from the PSU faceplate.

    • AC PSU—Detach the power cord retainer and gently pull out the socket end of the power cord connected to the PSU faceplate.

    • DC PSU—Gently pull the circular grip on the pull-tab latch of the power cord to release the lock on the PSU faceplate. Once the lock is released, pull the power cord to detach it from the PSU faceplate.

      CAUTION:
      Do not pull the circular grip on the pull-tab latch and the DC PSU power cord simultaneously.
      Figure 1: Remove the DC PSU Power Cord Remove the DC PSU Power Cord
  5. Press the PSU handle from the side.
  6. Grasp the PSU handle and pull firmly to slide the PSU halfway out of the chassis.
    Figure 2: Remove an AC PSU from QFX5241-64OD and QFX5241-64QD Switches Removing or installing a PSU in server equipment with green arrows showing direction; includes cooling fans and connectors.
    Figure 3: Remove a DC PSU from QFX5241-64OD and QFX5241-64QD Switches Remove a DC PSU from QFX5241-64OD and QFX5241-64QD Switches
  7. Place one hand under the PSU to support it and slide it completely out of the chassis. Take care not to touch the following:

    • PSU components

    • Pins

    • Leads

    • Solder connections

  8. Place the PSU in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
  9. Replace the PSU with another PSU.

Install a Power Supply Unit in QFX5241-64OD and QFX5241-64QD Switches

  • Before you install an AC or a DC PSU in QFX5241-64OD and QFX5241-64QD switches, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage.

  • Ensure that the airflow direction of the PSU is the same as the chassis. Labels on the PSU handle indicate the direction of airflow. See QFX5241-64OD and QFX5241-64QD Cooling System for more information.

To install a PSU in QFX5241-64OD and QFX5241-64QD switches:

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to the ESD point on the rack.
  2. Remove the PSU from its bag, taking care not to touch the following:

    • PSU components

    • Pins

    • Leads

    • Solder connections

    CAUTION:

    Verify that the direction of the arrow on the PSU handle matches the direction of airflow in the chassis. Ensure that each PSU you install in the chassis has the same airflow direction. If you install power supplies with two different airflow directions, Junos OS raises an alarm, and the status (ALM) LED blinks amber.
  3. If the PSU has a protective plastic wrap, peel and remove the plastic wrap from all four sides of the PSU.
  4. Using both hands, place the PSU in the PSU slot on the FRU panel of the switch and slide it in until it is fully seated.
Figure 4: Install an AC PSU in QFX5241-64OD and QFX5241-64QD Switches Removing a power supply unit from a server with a green arrow indicating the direction.
Figure 5: Install a DC PSU in QFX5241-64OD and QFX5241-64QD Switches Install a DC PSU in QFX5241-64OD and QFX5241-64QD Switches
Note:

Each PSU must be connected to a dedicated power source outlet.
Note:

If you have a Juniper Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/ . Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.