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QFX5700 Power Supply Maintenance

SUMMARY Maintaining an QFX5700 switch includes replacing power supplies. Replacing includes removing a failed power supply and installing a functional power supply.

The QFX5700 switch is powered by 3000 W redundant hot-removable and hot-insertable pre-installed AC/HVDC or DC power supplies. QFX5700-BASE configuration switch is powered by two power supplies for 1 + 1 redundancy and QFX5700-PREMIUM configuration is powered by four power supplies for 2+2 redundancy. If any power supply unit fails, you can replace it without powering off or disrupting the routing function, the other power supply units will balance the electrical load without interruption.

CAUTION:

Do not mix AC/HVDC and DC power supplies in the same chassis.

AC/HVDC Power Supply Replacement in a QFX5700 Switch

Warning:

Turn off the power source before disconnecting the power cord to prevent damage to the power connector contact.
Warning:

If you need to replace all the power supplies installed in your QFX5700 switch, you must power off the QFX5700 switch before removing the power supplies.
CAUTION:

Replace the power supply within one minute of removal, to prevent chassis overheating. Before removing the power supply, ensure that you have a replacement power supply available.
CAUTION:

The AC/HVDC power supply you are installing must use the same airflow direction as the fan trays installed in the switch. Labels on the power supply handle indicate the direction of airflow.
CAUTION:

Before you replace a power supply in an QFX5700 switch, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).

Ensure that you have the following parts and tools available to replace a power supply:

  • ESD grounding strap (provided)

  • Antistatic bag or an antistatic mat (not provided)

  • (For a DC power supply) Phillips (+) screwdriver, number 2 (not provided)

Remove an AC/HVDC Power Supply from the QFX5700 Switch

To remove an AC/HVDC power supply:

  1. Place the antistatic bag or the antistatic mat on a flat, stable surface.
  2. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the device.
  3. Disconnect power to the QFX5700 power supply that you are going to replace. If the AC input power source outlet has a power switch, set it to the off (O) position. If the AC input 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 power supply by pressing in the locking button on the side of the power connector and gently pulling the connector out of the power supply faceplate. See Figure 1.
    Figure 1: Removing the Power Cord from the Power Supply Removing the Power Cord from the Power Supply
  5. Slide the ejector lever on the power supply toward the orange handle until it stops.
  6. Place one hand under the power supply to support it, and slide it completely out of the chassis. Take care not to touch power supply components, pins, leads, or solder connections. See Figure 2.
    Figure 2: Removing an AC/HDVC Power Supply from the QFX5700 Switch Removing an AC/HDVC Power Supply from the QFX5700 Switch
  7. Place the power supply in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
  8. Install a new power supply within one minute of removing the old one.

Install an AC/HVDC Power Supply in the QFX5700 Switch

CAUTION:

Install the replacement power supply within one minute of removal to prevent the chassis from overheating. Before removing the power supply, ensure that you have a replacement power supply available.

To install an AC/HVDC power supply:

  1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the device.
  2. If the power supply has protective plastic wrap, peel and remove the plastic wrap from all four sides of the power supply.
  3. Taking care not to touch power supply components, pins, leads, or solder connections, remove the power supply from its bag.
  4. Using both hands, place the power supply in the power supply slot on the field replaceable unit (FRU) panel of the QFX5700 switch, and slide it in until it is fully seated and the ejector lever slides into place. See Figure 3.
Figure 3: Installing an QFX5700 AC/HVDC Power Supply Installing an QFX5700 AC/HVDC Power Supply
Note:

Each power supply 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.

DC Power Supply Replacement in an QFX5700 Switch

Warning:

Turn off the circuit breaker for the DC power source before disconnecting the power cord from the power supply. Unplugging a DC connection while the power supply is powered up may damage the electrical connectors.
Warning:

If you need to replace all the power supplies installed in your QFX5700 switch, you must power off the AQFX5700 switch before removing the power supplies.
CAUTION:

Replace the power supply within one minute of removal, to prevent chassis overheating. Before removing the power supply, ensure that you have a replacement power supply available.
CAUTION:

The DC power supply that you are installing must use the same airflow direction as the fan trays installed in the switch. Labels on the power supply handle indicate the direction of airflow.

CAUTION:

Before you replace a power supply in an QF5700 switch, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage.

Remove a DC Power Supply from the QFX5700 Switch

To remove a DC power supply:

  1. Place the antistatic bag or the antistatic mat on a flat, stable surface.
  2. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the device.
  3. Turn off the circuit breaker for the power feed to the power supply that you are replacing. Be sure the LEDs turn off on the power supply that you are removing.
  4. Loosen the thumb screws for the power cable. Gently pull out the socket end of the power plug connected to the power supply faceplate.
  5. Disconnect a connector for the power cables, or release each of three cables from the power supply (requires a standard screw driver).
  6. Grasp the power supply handle while pressing the release latch towards the power supply handle.
  7. Place one hand under the power supply to support it, and slide it completely out of the chassis. Take care not to touch power supply components, pins, leads, or solder connections. See Figure 4.
    Figure 4: Removing a DC Power Supply from the QFX5700 Switch Removing a DC Power Supply from the QFX5700 Switch
  8. Place the power supply in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
  9. Install a new power supply within one minute of removing the old one.

Install a DC Power Supply in the QFX5700 Switch

CAUTION:

Install the replacement power supply within one minute of removal, to prevent chassis overheating. Before removing the power supply, ensure that you have a replacement power supply available.

To install a DC power supply:

  1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the device.
  2. If the power supply has protective plastic wrap, peel and remove the plastic wrap from all four sides of the power supply.
  3. Taking care not to touch power supply components, pins, leads, or solder connections, remove the power supply from its bag.
  4. To prevent equipment damage caused by electrostatic discharge, attach an ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  5. Taking care not to touch power supply components, pins, leads, or solder connections, remove the power supply from its bag.
  6. Using both hands, place the power supply in the power supply slot on the field replaceable unit (FRU) panel of the QFX5700 switch, and slide it in until it is fully seated and the locking lever slides into place. See Figure 5.
Figure 5: Installing a DC Power Supply in the QFX5700 Switch Installing a DC Power Supply in the QFX5700 Switch
Note:

Each power supply 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.