Exchange the I/O enclosure power supply to the power distribution unit (PDU) cable

Before you begin

Icon for electrostatic discharge wrist strapUse approved ESD procedures to prevent damage.

Attention:
  • This procedure is not a stand-alone procedure. Customer disruption and damage to the hardware might occur when microcode and power boundaries are not in the proper conditions for this service action.
  • If a serviceable event FRU repair directed you to this procedure, the microcode and power boundaries are already set.
  • If a serviceable event FRU repair did not direct you to this procedure, see MAP1230 Replace a FRU without using a serviceable event.
Notes:
  • All the cables and FRUs to be removed must be uniquely identified so they can be reinstalled correctly.
  • If an installed earthquake resistance kit prevents you from accessing this FRU, refer to MAP1600.

Remove the I/O enclosure power supply to the PDU cable

About this task

Note: The I/O enclosure must be fully removed from the rack for this procedure.

Procedure

  1. To locate this FRU, take one of the following actions and then return here and continue to replace the FRU:
    • If this FRU has a FRU identify indicator, use the FRU identify indicator, which is listed in MAP1240 Locating FRUs by using identify indicators. If not, use the location code.
      Note: There might be cases where the FRU failure or fencing conditions prevent the FRU LED indicator from being lit even if the FRU has power.
    • Use the location code, which is listed in MAP1245 Finding FRUs by using location codes.
    • If there is no FRU identify indicator or location code, you were sent here by an isolation MAP or symbolic FRU procedure. Use the information in that procedure and the figures in this procedure to locate the proper part to exchange.
  2. Most, but not all, FRUs have identify indicators. Use the flashing amber or solid blue FRU identify indicators to ensure that you are working on the correct enclosure or FRU.
  3. At the front of the rack, unplug the power input cable from power supplies E1 and E2 in the I/O enclosure. See Figure 1.
    Figure 1. I/O enclosure locations (front) (models 98x, 8xE)
    I/O enclosure locations (front) (models 98x)
  4. Remove both power supplies and the air baffle between them.
    1. Push the orange release button beneath the input power connector. See Figure 1.
    2. Pull the power supply straight out from the I/O enclosure.
    3. After both power supplies are removed, remove the air baffle.
      Note: When the air baffle is secured by a captive screw, loosen the screw. It is not necessary to fasten the screw when the baffle is installed.
  5. Remove both fan assemblies,  A1  and  A2 . See Figure 1.
    1. Unlatch the fan release lever at the upper right corner of the fan. Then, use it to pull the fan assembly straight out from the I/O enclosure.
  6. At the rear of the rack, unplug all I/O enclosure cables. See Table 1 and Figure 2.
    Ensure that you label the cables so they can be properly replugged.
    Table 1. I/O enclosure cable connections (rear)
    Connection Location
    FC-AL to storage C3-Tx, C6-Tx
    Host cables C1-Tx, C2-Tx, C4-Tx, C5-Tx
    PCIe to CEC enclosure C7-T1, C7-T2
    PCIe to storage (if present) C7-T5, C7-T6
    PCIe to storage (if present) C3-T1, C6-T1
    PCN C7-T7, C7-T8
    Power (if present) C7-T10
    Figure 2. I/O enclosure locations (rear) (models 98x, 8xE)
    I/O enclosure locations (rear) (models 98x)
    Notes:
    • I/O enclosure PCIe storage interface card (locations C3 and C6) not shown.
    • The older generation I/O enclosure PCIe and PCN card might not include T3, T4, and T10 ports.
  7. To disconnect the cable from the PDU, release the cable connector retainer. See Figure 3.
    Figure 3. Locations for power distribution unit (PDU) connectors
    Locations for power distribution unit (PDU) connectors
  8. Remove the I/O enclosure chassis from the rack. See Figure 4.
    1. At the rear of the rack, remove the two hold-down screws Callout label 1.
      Note: Later versions have a single screw and clamp that are located between each pair of I/O enclosures.
    2. Push the I/O enclosure forward towards the front of the rack Callout label 2.
    3. At the front of the rack, pull the I/O enclosure out the front, taking care to balance it when it is free of the rack.
    4. Place the I/O enclosure on a static-free surface.
    Figure 4. Remove the I/O enclosure chassis
    Note: Earlier rack model shown. I/O enclosure removal from Model 98x is similar.
    Remove the I/O enclosure chassis
  9. Remove the failing power cable.

Install the I/O enclosure power supply to the PDU cable

Procedure

  1. Install the new power cable alongside the I/O enclosure.
  2. Slide the I/O enclosure back into the rack and install the hold-down screws.
  3. At the rear of the rack, connect all the cables to the I/O enclosure.
    Table 2. I/O enclosure cable connections (rear)
    Connection Location
    FC-AL to storage C3-Tx, C6-Tx
    Host cables C1-Tx, C2-Tx, C4-Tx, C5-Tx
    PCIe to CEC enclosure C7-T1, C7-T2
    PCIe to storage (if present) C7-T5, C7-T6
    PCIe to storage (if present) C3-T1, C6-T1
    PCN C7-T7, C7-T8
    Power (if present) C7-T10
  4. At the front of the rack, install the power supply baffle between the two power supply locations.
    Note: If the air baffle includes a captive screw, it is not necessary to fasten the screw.
  5. Install the two power supplies. Do not connect the power cables now. Ensure that the orange latch beneath the input power connector is secure.
  6. Install and latch the two fans.
  7. Connect the power input cable to each power supply.
  8. At the rear of the rack, route and connect the power cables to the PDU.
  9. Reinstall the cable retention hardware.
  10. Exit this service information center parts exchange procedure and return to the procedure that sent you here.