Power supply removal and replacement

The switch has two power supplies, as displayed in Figure 1. The Fabric OS identifies the power supplies from left to right on the nonport side as power supply #2 and power supply #1.

Attention: Disassembling any part of the power supply voids the part warranty and regulatory certifications. There are no user-serviceable parts inside the power supply. Because the cooling system relies on pressurized air, do not leave either of the power supply slots empty longer than two minutes while the switch is operating. If a power supply fails, leave it in the switch until it can be replaced. Maintain both power supplies in operational condition to provide redundancy.
Refer to Table 2 for the power supply status LED colors, behaviors, and actions required, if any.

Determining the need to replace a power supply

Use one of the following methods to determine the status of the power supplies:
  • Check the power supply AC status and DC status LEDs (see Figure 2 ). Both LEDs should be green to indicate that the power supply is functioning correctly. If the DC status LED is amber, there is no power on the cord.
  • In Web Tools, click the Power Status icon.
  • At the command prompt, enter the psShow command to display power supply status as shown in this example below: 
    2498:admin> psshow
Power Supply #1 is OK
Airflow Direction : Portside Intake (Forward)
Power Supply #2 is OK
Airflow Direction : Portside Intake (Forward)
2498:admin>

Time and items required

Replacing a power supply in the switch requires less than two minutes to complete.

To replace a power supply in the switch, you need a new power supply that has the same part number as the power supply being replaced.

Figure 1. Switch power supply components
power supply components
  •  1  - Power supply #2
  •  2  - Grounding screw
  •  3  - Handle
  •  4  - AC input status LED
  •  5  - Locking tab
  •  6  - DC output status LED
  •  7  - Power cord receptacle

Replacing a power supply

Complete the following steps to replace a power supply in the switch. Refer to Figure 1 and Figure 2 for this procedure.

  1. To leave the switch in service while replacing a power supply, verify that the other power supply (the one not being replaced) has been powered on for at least four seconds and has a steady green status LED.
  2. Unplug the power cord from the power cord receptacle ( 7  in Figure 1) of the power supply that is being replaced.
  3. Push the locking tab ( 5 ) to the left and hold it there while using the handle ( 3 ) on the power supply to pull it straight out and away from the chassis. Pull the power supply out slowly to avoid catching a finger on the locking tab.
    Figure 2. Removing and replacing a power supply in the switch
    power supply removal and replacement
  4. Slide the new power supply into the chassis until the locking tab engages.
    Attention: Do not force the installation. If the power supply does not slide in easily, ensure that the power supply is correctly oriented before continuing.
  5. Plug the power cord into the power supply to power on the unit. If the power circuit was on before the replacement, the power supply will immediately attempt to power up.
  6. Verify that the LEDs on the new power supply display steady green while the switch is operating (refer to Table 2). If the LEDs are not steady green, ensure that the power supply is securely installed and seated properly.
  7. Optionally, use the command line interface (CLI) to enter the psShow command to display the status. You can also use the chassisShow command. The power supply status can also be viewed using the Web Tools application.