PWR1911

You are here because of a power problem on a system with more than one line cord. If the failing unit does not have more than one line cord, return to the procedure that sent you here or go to the next item in the FRU list.

The following steps are for the system unit, unless other instructions are given. For important safety information before you service the system, see Power isolation procedures.
  1. If an uninterruptible power supply is installed, verify that it is powered on before proceeding.
  2. Are all the units powered on?
    • Yes: Go to step 7.
    • No: On the unit that does not power on, perform the following steps:
      1. Disconnect the line cords from the unit that does not power on.
      2. Use a multimeter to measure the voltage at the system end of the line cords.
        Table 1. Correct voltage
        Model or expansion drawer Correct ac voltage Correct dc voltage
        5148-21L, 5148-22L, 8247-21L, 8247-22L, 8247-42L, 8284-21A, 8284-22A, 8286-41A, or 8286-42A 100 - 127 V or 200 - 240 V -37.5 - -60 V or 192 - 400 V
        8408-44E or 8408-E8E 200 - 240 V 192 - 400 V
        9080-MHE, 9080-MME, 9119-MHE, or 9119-MME 200 - 240 V 192 - 400 V
        EMX0 PCIe3 expansion drawer 100 - 127 V or 200 - 240 V 192 - 400 V
      3. Is the voltage correct (see Table 1)?
        • Yes: Continue with the next step.
        • No: Go to step 4.
  3. Perform the following steps:
    1. Reconnect the line cords.
    2. Verify that the failing unit fails to power on.
    3. Replace the failing power supply. Use the following table to determine which power supply needs to be replaced, and then see Part locations and location codes for location, part number, and exchange procedure information.
      Table 2. Failing power supply for systems models and expansion drawers
      Reference code System unit or expansion drawer Failing item name
      1510 System unit Power supply 1
      Expansion drawer Power supply 1
      1520 System unit Power supply 2
      Expansion drawer Power supply 2
      1530 System unit Power supply 3
      1540 System unit Power supply 4

      This ends the procedure.

  4. Is the system a 9080-MHE, 9080-MME, 9119-MHE, or 9119-MME?
    • Yes: Continue with the next step.
    • No: Go to step 6.
  5. Perform the following steps at the rear of the system:
    1. Disconnect the line cords from the connectors on the line cord conduit for the unit that does not power on.
    2. Use a multimeter to measure the voltage at the system end of the line cords.
    3. Is the voltage correct (see Table 1)?
    • Yes: Replace the line cord conduit. This ends the procedure.
    • No: Continue with the next step.
  6. Perform the following steps:
    1. Disconnect the line cords from the customer's power outlet.
    2. Use a multimeter to measure the voltage at the customer's power outlet.

    Is the voltage correct (see Table 1)?

    • Yes: Exchange the failing line cord.

      This ends the procedure.

    • No: Perform the following steps:
      1. Inform the customer that the voltage at the power outlet is not correct.
      2. Reconnect the line cords to the power outlet after the voltage at the power outlet is correct.

        This ends the procedure.

  7. Is the reference code 1xxx00AC?
    • No: Continue with the next step.
    • Yes: This reference code might be caused by an outage. If the system will power on without an error, no parts need to be replaced.

      This ends the procedure.

  8. Is the reference code 1xxx15x0?
    • No: Perform Problem Analysis by using the reference code.

      This ends the procedure.

    • Yes: Perform the following steps:
      1. Use the following table to locate the failing parts. For information about locations, see Part locations and location codes.
        Table 3. Power reference code table
        System unit or expansion drawer Reference code Locate these parts
        System unit 1xxx 1510 Power supply E1 and line cord 1
        1xxx 1520 Power supply E2 and line cord 2
        1xxx 1530 Power supply E3 and line cord 3
        1xxx 1540 Power supply E4 and line cord 4
        Expansion drawer 1xxx 1510 Power supply 1 and line cord 1
        1xxx 1520 Power supply 2 and line cord 2
      2. Locate the line cord or the jumper cable for the reference code you are working on.
      3. Go to step 9.
  9. Perform the following steps:
    Attention: Do not disconnect the other system line cords or the other jumper cables when powered on.
    1. For the reference code you are working on, disconnect either the jumper cable or the line cord from the power supply.
    2. Use a multimeter to measure the voltage at the power supply end of the jumper cable or the line cord.

    Is the voltage correct (see Table 1)?

    • No: Continue with the next step.
    • Yes: Exchange the failing power supply. See Table 2 for its position, and then see Part locations and location codes for part numbers and directions to the correct exchange procedures. This ends the procedure.
  10. Perform the following steps:
    1. Disconnect the line cords from the power outlet.
    2. Use a multimeter to measure the voltage at the customer's power outlet.

    Is the voltage correct (see Table 1)?

    • Yes: Exchange the following items, one at a time:
      • Failing line cord
      • Failing jumper cable (if installed)

      This ends the procedure.

    • No: Perform the following steps:
      1. Inform the customer that the voltage at the power outlet is not correct.
      2. Reconnect the line cords to the power outlet after the voltage at the power outlet is correct.

      This ends the procedure.

Parent topic: Power isolation procedures


Last updated: Wed, June 19, 2019