DS8000 Service Documentation Version 7.5

Exchange the storage enclosure power supply

Before you begin

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

Attention:
  • This is not a stand-alone procedure. Customer disruption and damage to the hardware might occur if microcode and power boundaries are not in the proper conditions for this service action.
  • If you were sent here by a serviceable event FRU repair, the microcode and power boundaries have already been set.
  • If you were not sent here by a serviceable event FRU repair, 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 storage enclosure power supply

Before you begin

Attention: Power supplies are hot-pluggable FRUs. Only remove one power supply at a time.

Procedure

  1. To locate this FRU, do one of the following 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 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.
    • The "light path" identify LEDs are a hierarchy of LEDs that can identify the rack, enclosure, FRU, and even the FRU connector to which a cable is connected.
    • For more information, refer to MAP1240 Locating FRUs using identify indicators.
  3. At the rear of the rack, observe the partner power supply, which is not being replaced, in this storage enclosure. See Figure 1. The input power good LED Callout label 1 on the partner power supply must be lit before going to the next step. This will ensure that the storage enclosure remains powered while the failing power supply is removed. If the power good LED is not lit, DO NOT CONTINUE. Instead contact your next level of support.
    • Callout label 1 AC input good
    • Callout label 2 DC output good
    • Callout label 3 Identify/attention
    Figure 1. Storage enclosure power supply and midplane (rear view)
    Storage enclosure power supply and midplane (rear view)
  4. Observe the storage enclosure power supply that is being replaced.
    • The input power LED Callout label 1 and the output power LED Callout label 2 will still be lit even though the HMC screen indicates the FRU was powered off. This is normal. See Figure 1.
    • The power LEDs will be off after the input power cord is disconnected in the next step.
  5. To maintain proper cooling airflow through the storage enclosure, both power supplies must be physically installed, even if one of them is not functional. When a power supply is removed, it disrupts the airflow. Ensure you are ready to install the new power supply immediately after removing the old power supply.
  6. If you are exchanging the upper power supply (E1) in a vertical mount enclosure, loosen, but do not remove, the top clamp screws. Slide the top clamp up to allow removal and installation of the power supply. See Figure 2.
    Figure 2. Top clamp
    Top clamp
  7. Remove the power supply.
    1. Disconnect the power cable.
    2. Push the orange retaining clip towards the black pull handle, and pull the power supply straight out from the enclosure. See Figure 1.

Install the storage enclosure power supply

Procedure

  1. Install the new power supply.
    1. Rotate the new power supply so the orange retaining clip is at the bottom (vertical mount) or towards the right (horizontal mount). See Figure 1.
    2. Slide the new power supply into the storage enclosure and ensure the orange retaining clip seats fully.
    3. Gently pull the power supply handle to ensure it is fully seated and latched.
    4. Connect the power cable to the power supply.
  2. If you moved the top clamp to remove and install the power supply, secure the clamp on the rear of the enclosure(s) and tighten the screws.
  3. Exit this service information center parts exchange procedure and return to the procedure that sent you here.