PWR1911

You are here because of a power problem on a dual line cord system. If the failing unit does not have a dual 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 servicing the system, refer to 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:
      1. Disconnect the ac line cords from the unit that does not power on.
      2. Use a multimeter to measure the ac voltage at the system end of both ac line cords.
        Table 1. Correct ac voltage
        Model or expansion unit Correct ac voltage
        Models 8203-E4A, 5095, 0595, and 7311-D20 expansion units 100 V to 127 V or 200 V to 240 V
        Models 8234-EMA, 9117-MMA, 9406-MMA, 5796 and 7314-G30 expansion units 200 V to 240 V
        5088, 0588, 5094, 5294, 5790, and 7311-D11 expansion units 200 V to 240 V ac or dc
        5095, 0595, and 7311-D20 expansion units 100 V to 127 V or 200 V to 240 V
      3. Is the voltage correct (refer to Table 1)?
        • Yes: Continue with the next step.
        • No: Go to step 6.
  3. Are you working on a system 8203-E4A, 8204-E8A, 8234-EMA, 9117-MMA, and 9406-MMA, 9407-M15, 9408-M25, 9409-M50, or a 5095, 0595, 5790, 5796, 7314-G30, 7311-D11, 7311-D20 expansion unit?
    • No: Continue with the next step.
    • Yes: Perform the following:
      1. Reconnect the ac line cords.
      2. Verify that the failing unit fails to power on.
      3. Replace the failing power supply. Use the table below to determine which power supply needs replacing, and then see System FRU locations for its location, part number, and exchange procedure.
        Table 2. Failing power supply for models 8203-E4A, 8204-E8A, 8234-EMA, 9117-MMA, and 9406-MMA, 9407-M15, 9408-M25, and 9409-M50, or a 5095, 0595, 5790, 5796, 7314-G30, 7311-D11, 7311-D20 expansion units
        Reference code Models or expansion units Failing item name
        1510 8203-E4A, 8204-E8A, 8234-EMA, 9117-MMA, and 9406-MMA, 9407-M15, 9408-M25, 9409-M50 Power supply 1
        5095, 0595, 5790, 5796, 7314-G30, 7311-D11, 7311-D20 Power supply 1
        1520 8203-E4A, 8204-E8A, 8234-EMA, 9117-MMA, and 9406-MMA, 9407-M15, 9408-M25, 9409-M50 Power supply 2
        5095, 0595, 5790, 5796, 7314-G30, 7311-D11, 7311-D20 Power supply 2

        This ends the procedure.

  4. Perform the following:
    1. Reconnect the ac line cord to the ac modules.
    2. Remove the ac jumper cables at the power supplies.
    3. Use a multimeter to measure the ac voltage at the power-supply end of the jumper cable.

    Is the ac voltage from 200 V to 240 V?

    • No: Continue with the next step.
    • Yes: Replace the failing power supply. Use the following table to determine which power supply must be replaced, and then see System FRU locations for its location, part number, and exchange procedure.
      Attention: Do not install power supplies P00 and P01 ac jumper cables on the same ac module.
      Table 3. Failing power supply for 5094, 5294, 5088 or 0588 expansion units
      Reference code Failing item name
      1500 Power supply 0
      1510 Power supply 1 for 5094 or 5294
      Power supply 2 for 5088 or 0588
      1520 Power supply 2 for 5094 or 5294
      Power supply 1 for 5088 or 0588
      1530 Power supply 3

      This ends the procedure.

  5. Perform the following:
    1. Disconnect the ac jumper cable at the ac module output.
    2. Use a multimeter to measure the ac voltage at the ac module output.

    Is the ac voltage from 200 V to 240 V?

    • Yes: Exchange the ac jumper cable.

      This ends the procedure.

    • No: Exchange the ac module. See System FRU locations for FRU location information for the system that you are servicing.

      This ends the procedure.

  6. Perform the following:
    1. Disconnect the ac line cords from the customer's ac power outlet.
    2. Use a multimeter to measure the ac voltage at the customer's ac power outlet.

    Is the ac voltage correct (refer to Table 1)?

    • Yes: Exchange the failing ac line cord.

      This ends the procedure.

    • No: Perform the following:
      1. Inform the customer that the ac voltage at the power outlet is not correct.
      2. Reconnect the ac line cords to the power outlet after the ac 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 may have been caused by an ac 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 1xxx1510 or 1520?
    • No: Continue with the next step.
    • Yes: Perform the following:
      1. Use the following table, figures and location codes to locate the failing parts. SeeSystem FRU locations for information on FRU location for the system that you are servicing..
        Table 4. Power Reference Code Table
        Model or expansion unit Reference code Locate these parts
        8203-E4A, 8204-E8A, 8234-EMA, 9117-MMA, and 9406-MMA, 9407-M15, 9408-M25, 9409-M50 1xxx 1510 Power supply E1 and ac line cord 1
        1xxx 1520 Power supply E2 and ac line cord 2
        5088 and 0588 (see Figure 2) 1xxx 1510 ac jumper cable connected to power supply 2 and the ac module
        1xxx 1520 ac jumper cable connected to power supply 1 and the ac module
        5294 and 5094 (see Figure 1) 1xxx 1500 ac jumper cable connected to power supply 0 and the ac module
        1xxx 1510 ac jumper cable connected to power supply 1 and the ac module
        1xxx 1520 ac jumper cable connected to power supply 2 and the ac module
        1xxx 1530 ac jumper cable connected to power supply 3 and the ac module
        5095 and 0595 1xxx 1510 Power supply 1 and ac line cord 1
        1xxx 1520 Power supply 2 and ac line cord 2
        5790, 5796, 7314-G30, 7311-D11, 7311-D20 1xxx 1510 Power supply 1 and ac line cord 1
        1xxx 1520 Power supply 2 and ac line cord 2
        Figure 1. Dual line cord drawing for 5094
        Dual line cord drawing for 5094
        Figure 2. Dual line cord drawing for 5088, or 0588 installed on 5094
        Dual line cord drawing for 5088, or 0588 installed on 5094
      2. Locate the ac line cord or the ac jumper cable for the reference code you are working on.
      3. Go to step 10.
  9. Is the reference code 1xxx 1500 or 1xxx 1530?
    • No: Perform Problem Analysis using the reference code.

      This ends the procedure.

    • Yes: Locate the ac jumper cables for the reference code you are working on (see Table 4), and then continue with the next step:
      • If the reference code is 1xxx 1500, determine the locations of ac jumper cables that connect to power supply P00 (see the preceding figures).
      • If the reference code is 1xxx 1530, determine the locations of ac jumper cables that connect to power supply P03 (see the preceding figures).
  10. Perform the following:
    Attention: Do not disconnect the other system line cord when powered on.
    Attention: Do not disconnect the other ac jumper cable when powered on.
    1. For the reference code you are working on, disconnect either the ac jumper cable or the ac line cord from the power supply.
    2. Use a multimeter to measure the ac voltage at the power supply end of the ac jumper cable or the ac line cord.

    Is the ac voltage correct (see Table 1)?

    • No: Continue with the next step.
    • Yes: Exchange the failing power supply. Refer to Table 2 and Table 3 for its position, and then see System FRU locations for part numbers and directions to the correct exchange procedures. This ends the procedure.
  11. Perform the following:
    1. Disconnect the ac line cords from the power outlet.
    2. Use a multimeter to measure the ac voltage at the customer's ac power outlet.

    Is the ac voltage correct (see Table 1)?

    • Yes: Exchange the following, one at a time:
      • Failing ac line cord
      • Failing ac jumper cable (if installed)
      • Failing ac module (if installed) (see System FRU locations for part numbers and directions to the correct exchange procedures)

      This ends the procedure.

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

        This ends the procedure.