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.

If an uninterruptible power supply is installed, verify that it is powered on before proceeding.

Are all the units powered on?

Yes: Go to step 7.

No: On the unit that does not power on, perform the following:

Disconnect the ac line cords from the unit that does not power on.

Use a multimeter to measure the ac voltage at the system end of both ac line cords.

Table 34. Correct ac voltage
Model or expansion unit	Correct ac voltage
Models 8204-E8A and 9409-M50, and 5095, 0595, and 7311-D20 expansion units	100 V to 127 V or 200 V to 240 V
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

Is the voltage correct (refer to Table 34)?
- Yes: Continue with the next step.
- No: Go to step 6.

Are you working on a model 8204-E8A, or a 5095, 0595, 5790, 5796, 7314-G30, 7311-D11, or 7311-D20 expansion unit?

No: Continue with the next step.

Yes: Perform the following:

Reconnect the ac line cords.
Verify that the failing unit fails to power on.

Replace the failing power supply. Use the table below to determine which power supply needs replacing, and then see Locating FRUs for its location, part number, and exchange procedure.

Table 35. Failing power supply for models 8204-E8A and 9409-M50, and 5095, 0595, 5790, 5796, 7314-G30, 7311-D11 or 7311-D20 expansion units
Reference code	Models or expansion units	Failing item name
1510	8204-E8A and 9409-M50	Power supply 1
1510	5095, 0595, 5790, 5796, 7314-G30, 7311-D11, 7311-D20	Power supply 1
1520	8204-E8A and 9409-M50	Power supply 2
1520	5095, 0595, 5790, 5796, 7314-G30, 7311-D11, 7311-D20	Power supply 2

This ends the procedure.

Perform the following:

Reconnect the ac line cord to the ac modules.
Remove the ac jumper cables at the power supplies.
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 Locating FRUs 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 36. 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
1510	Power supply 2 for 5088 or 0588
1520	Power supply 2 for 5094 or 5294
1520	Power supply 1 for 5088 or 0588
1530	Power supply 3

This ends the procedure.

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 Locating FRUs).
  This ends the procedure.
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 34)?
- 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.
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.

Is the reference code 1xxx1510 or 1520?

No: Continue with the next step.

Yes: Perform the following:

Use the following table, figures and Locating FRUs to locate the failing parts.

Table 37. Power Reference Code Table
Model or expansion unit	Reference code	Locate these parts
8204-E8A and 9409-M50	1xxx 1510	Power supply E1 and ac line cord 1
8204-E8A and 9409-M50	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
5088 and 0588 (see Figure 2)	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
5095 and 0595	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
5790, 5796, 7314-G30, 7311-D11, 7311-D20	1xxx 1520	Power supply 2 and ac line cord 2

Figure 1. Dual line cord drawing for 5094

Figure 2. Dual line cord drawing for 5088, or 0588 installed on 5094

Locate the ac line cord or the ac jumper cable for the reference code you are working on.
Go to step 10.

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 37), 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).
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 34)?
- No: Continue with the next step.
- Yes: Exchange the failing power supply. Refer to Table 35 and Table 36 for its position, and then see Locating FRUs for part numbers and directions to the correct exchange procedures. This ends the procedure.
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 34)?
- Yes: Exchange the following, one at a time:
  - Failing ac line cord
  - Failing ac jumper cable (if installed)
  - Failing ac module (if installed) (see Locating FRUs 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.