ACMODUL

For more information about failing part numbers, location codes, or removal and replacement procedures, see Part locations and location codes. Select your machine type and model number to see applicable procedures for your system.

If the system or EMX0 PCIe3 expansion drawer that exhibited the power loss starts normally, or stays powered on after an ac power failure, replacement of parts might not be needed. Power failures can be caused by brown outs, building or room power receptacle power loss, loose or disconnected power cords, or possible hardware conditions.

1. Is the failing unit configured with a redundant power supply option (or dual line cord feature)?
   • No: Continue with the next step.
   • Yes: A service representative must perform power isolation procedure PWR1911.
2. Are all the units powered on?
   • Yes: This error might be caused by an ac power outage. If the system starts without an error, no parts need to be replaced. This ends the procedure.
   • No: On the unit that does not power on, verify that the power outlet is supplying the correct power for the unit. Also, ensure that both ends of the power cord (from the unit that does not power on) are connected correctly and securely.

     If you find a problem, correct the problem. This ends the procedure..

     If you cannot find the problem, continue with the next step.

3. A trained service representative must verify the voltage at the system end of the power cord with a multimeter to verify that the voltage is correct according to the following table.

   Type and Model	Correct 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
   8408-44E or 8408-E8E	200 - 240 V
   9080-MHE, 9080-MME, 9119-MHE, or 9119-MME	200 - 240 V
   EMX0 PCIe3 expansion drawer	100 - 127 V or 200 - 240 V

   Is the voltage correct?

   • Yes: Continue with the next step.
   • No: Go to the step 5.
4. Replace the failing power supply. Use the following table to determine the part number for the field replaceable unit (FRU).

   Type and Model	Part number	Description	Location code
   5148-21L, 5148-22L, 8247-21L, 8247-22L, 8247-42L, 8284-21A, 8284-22A, 8286-41A, 8286-42A, 8408-44E, 8408-E8E, 9080-MHE, 9080-MME, 9119-MHE, 9119-MME, or EMX0 PCIe3 expansion drawer	See System parts.	Power supply 1	Un-E1
   5148-21L, 5148-22L, 8247-21L, 8247-22L, 8247-42L, 8284-21A, 8284-22A, 8286-41A, 8286-42A, 8408-44E, 8408-E8E, 9080-MHE, 9080-MME, 9119-MHE, 9119-MME, or EMX0 PCIe3 expansion drawer	See System parts.	Power supply 2	Un-E2
   8286-41A,8286-42A, 8408-44E, 8408-E8E, 9080-MHE, 9080-MME, 9119-MHE, or 9119-MME	See System parts.	Power supply 3	Un-E3
   8286-41A,8286-42A, 8408-44E, 8408-E8E, 9080-MHE, 9080-MME, 9119-MHE, or 9119-MME	See System parts.	Power supply 4	Un-E4

5. Complete the following steps:
   1. Disconnect the power cord from the customer's power outlet.
   2. Use a multimeter to measure the voltage at the customer's power outlet.

      Is the voltage correct?

      • Yes: Replace the failing power cord. This ends the procedure.
      • No: Complete the following steps:
        1. Inform the customer that the voltage at the power outlet is not correct.
        2. After the voltage at the power outlet is correct, reconnect the power cord to the power outlet. This ends the procedure.