ACMODUL

If you need additional information for failing part numbers, location codes, or removal and replacement procedures, see Part locations and location codes. Select your machine type and model number to find additional location codes, part numbers, or replacement procedures for your system.

If the system or expansion unit 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 have been 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 this procedure.

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

     Note: In an 8233-E8B or 8236-E8C system, there are two internal ac power cables that run from the back of the drawer to the power supplies in the front. The upper ac power connector on the back of the system goes to power supply E1. The lower ac power connector on the back of the system goes to power supply E2.
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.

   Model or expansion unit	Correct voltage
   8202-E4B, 8202-E4C, 8202-E4D, 8205-E6B, 8205-E6C, 8205-E6D, 8231-E2B, 8231-E1C, 8231-E1D, 8231-E2C, 8231-E2D, 8268-E1D	100 - 127 V or 200 - 240 V
   8233-E8B, 8236-E8C	200 - 240 V ac or 200 - 220 V dc
   8248-L4T, 8408-E8D, 9109-RMD	200 - 240 V ac
   8412-EAD, 9117-MMB, 9117-MMC, 9117-MMD, 9179-MHB, 9179-MHC, 9179-MHD	200 - 240 V ac
   5796, 7314-G30	200 - 240 V ac or 200 - 220 V dc
   5802	200 - 240 V ac

   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).

   CCIN or FFC	Type and model	Part number	Description	Location code
   	8202-E4B, 8202-E4C, 8202-E4D, 8205-E6B, 8205-E6C, 8205-E6D, 8231-E2B, 8231-E1C, 8231-E1D, 8231-E2C, 8231-E2D, 8268-E1D	See System parts.	Power supply 1	Un-E1
   	8202-E4B, 8202-E4C, 8202-E4D, 8205-E6B, 8205-E6C, 8205-E6D, 8231-E2B, 8231-E1C, 8231-E1D, 8231-E2C, 8231-E2D, 8268-E1D	See System parts.	Power supply 2	Un-E2
   	8233-E8B, 8236-E8C	See System parts.	Power supply 1 (ac supply)	Un-E1
   	8233-E8B, 8236-E8C	See System parts.	Power supply 2 (ac supply)	Un-E2
   	8233-E8B, 8236-E8C	See System parts.	Power supply 1 (dc supply)	Un-E1
   	8233-E8B, 8236-E8C	See System parts.	Power supply 2 (dc supply)	Un-E2
   	8248-L4T, 8408-E8D, 8412-EAD, 9109-RMD, 9117-MMB, 9117-MMC, 9117-MMD, 9179-MHB, 9179-MHC, 9179-MHD	See System parts.	Power supply 1	Un-E1
   	8248-L4T, 8408-E8D, 8412-EAD, 9109-RMD, 9117-MMB, 9117-MMC, 9117-MMD, 9179-MHB, 9179-MHC, 9179-MHD	See System parts.	Power supply 2	Un-E2
   	5796, 7314-G30	42R4491	Power supply 1	Un-E1
   	5796, 7314-G30	42R4491	Power supply 2	Un-E2
   	5802	See System parts.	Power supply 1	Un-E1
   	5802	See System parts.	Power supply 2	Un-E2

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.