Exchange the power distribution unit (PDU)

Before you begin

Icon for electrostatic discharge wrist strapUse approved ESD procedures to prevent damage.

Attention:
  • This procedure is not a stand-alone procedure. Customer disruption and damage to the hardware might occur when microcode and power boundaries are not in the proper conditions for this service action.
  • If a serviceable event FRU repair directed you to this procedure, the microcode and power boundaries are already set.
  • If a serviceable event FRU repair did not direct you to this procedure, see MAP1230 Replace a FRU without using a serviceable event.
Notes:
  • All the cables and FRUs to be removed must be uniquely identified so they can be reinstalled correctly.
  • If an installed earthquake resistance kit prevents you from accessing this FRU, refer to MAP1600.
DANGER
Hazardous voltage, current, or energy levels are present inside of a component to which this label is attached. (L001)
Safety label L001

Remove the power distribution unit (PDU)

Procedure

  1. Open the rear door.
  2. To locate this FRU, do one of the following and then return here and continue to replace the FRU:
    • If this FRU has a FRU identify indicator, use the FRU identify indicator, which is listed in MAP1240 Locating FRUs by using identify indicators. If not, use the location code.
      Note: There may be cases where the FRU failure or fencing conditions prevent the FRU LED indicator from being lit even if the FRU has power.
    • Use the location code, which is listed in MAP1245 Finding FRUs by using location codes. (Figure 1)
    • If there is no FRU identify indicator or location code, you were sent here by an isolation MAP or symbolic FRU procedure. Use the information in that procedure and the figures in this procedure to locate the proper part to exchange.
    Figure 1. Models 980, 981, 982 base rack locations

    Locations for models 980, 981, 982 are shown. PDU locations are similar for expansion rack models 98x.

    Model 980, 981, 982 base rack locations
    Figure 2. Models 984, 985, 986, 988 base rack locations
    Notes:
    • Locations for models 984, 985, 986, 988 are shown. PDU locations are similar for expansion rack models 8xE.
    • Rack-1 shown. PJAs E51, E52, E53 and E54 can also be present in Rack-2.
    Model 984, 985, 986, 988 base rack locations
  3. Most, but not all, FRUs have identify indicators. Use the flashing amber or solid blue FRU identify indicators to ensure that you are working on the correct enclosure or FRU.
  4. Disconnect the two PDU power input cable plugs P1 and P2 from the associated DC-UPS DSU power connectors. See Table 1, Table 2, Table 3, Table 4, Table 5, and Table 6 for the connections that apply to the PDU you are replacing.
    Attention: Ensure that you have the correct connectors before disconnecting.
    Table 1. PDU-to-DC-UPS cabling overview
    Rack model(s) Rack number Refer to this table:
    980, 98B
    981, 98E single-phase
    984, 84E
    984 all-flash
    985, 85E
    985, 85E all-flash    		 All racks Table 2
    982, 98F All racks Table 3
    981, 98E three-phase
    986, 86E
    986, 86E all-flash
    988, 88E    		 Rack-1 Table 4
    981, 98E three-phase
    986, 86E
    986, 86E all-flash
    988, 88E    		 Rack-2 Table 5
    981, 98E three-phase
    986, 86E    		 Rack-3, Rack-4, Rack-5 Table 6
    988, 88E Rack-3 Table 6
    Table 2. PDU-to-DC-UPS cabling - all racks (Models 980, 98B and Models 981, 98E with single-phase power; Models 984, 84E; Models 985, 85E)
    PDU port Connects to Connection description PDU group
    Note: For further guidance on the connects to locations in this table, refer to Rack power and cooling location codes.
    E21-P1 E1-J1-1 DC-UPS E1 (left), DDM source 1 Green
    E21-P2 E1-J1-2 DC-UPS E1 (left), DDM source 2 Green
    E22-P1 E2-J1-1 DC-UPS E2 (right), DDM source 1 Yellow
    E22-P2 E2-J1-2 DC-UPS E2 (right), DDM source 2 Yellow
    E23-P1 E1-J2-1 DC-UPS E1 (left), main source 1 Green
    E23-P2 E1-J2-2 DC-UPS E1 (left), main source 2 Green
    E24-P1 E2-J2-1 DC-UPS E2 (right), main source 1 Yellow
    E24-P2 E2-J2-2 DC-UPS E2 (right), main source 2 Yellow
    Table 3. PDU-to-DC-UPS cabling - all racks (Models 982, 98F)
    PDU port Connects to Connection description PDU group
    Note: For further guidance on the connects to locations in this table, refer to Rack power and cooling location codes.
    E21-P1 E1-J1-1 DC-UPS E1 (left), DDM source 1 Green
    E21-P2 E1-J2-1 DC-UPS E1 (left), main source 1 Green
    E22-P1 E2-J1-1 DC-UPS E2 (right), DDM source 1 Yellow
    E22-P2 E2-J2-1 DC-UPS E2 (right), main source 1 Yellow
    E23-P1 E1-J2-2 DC-UPS E1 (left), main source 2 Green
    E23-P2 E1-J2-3 DC-UPS E1 (left), main source 3 Green
    E24-P1 E2-J2-2 DC-UPS E2 (right), main source 2 Yellow
    E24-P2 E2-J2-3 DC-UPS E2 (right), main source 3 Yellow
    Table 4. PDU-to-DC-UPS cabling - Rack 1 (Models 981, 98E with three-phase power; Models 986, 86E; Models 988, 88E)
    PDU port Connects to Connection description PDU group
    Note: For further guidance on the connects to locations in this table, refer to Rack power and cooling location codes.
    E21-P1 E1-J1-1 DC-UPS E1 (left), DDM source 1 Green
    E21-P2 E1-J2-1 DC-UPS E1 (left), main source 1 Green
    E22-P1 E2-J1-1 DC-UPS E2 (right), DDM source 1 Yellow
    E22-P2 E2-J2-1 DC-UPS E2 (right), main source 1 Yellow
    E23-P1 E1-J2-2 DC-UPS E1 (left), main source 2 Green
    E23-P2 E1-J2-3 DC-UPS E1 (left), main source 3 Green
    E24-P1 E2-J2-2 DC-UPS E2 (right), main source 2 Yellow
    E24-P2 E2-J2-3 DC-UPS E2 (right), main source 3 Yellow
    Table 5. PDU-to-DC-UPS cabling - Rack 2 (Models 981, 98E with three-phase power; Models 986, 86E; Models 988, 88E)
    PDU port Connects to Connection description PDU group
    Note: For further guidance on the connects to locations in this table, refer to Rack power and cooling location codes.
    E21-P1 E1-J1-1 DC-UPS E1 (left), DDM source 1 Green
    E21-P2 E1-J1-2 DC-UPS E1 (left), DDM source 2 Green
    E22-P1 E2-J1-1 DC-UPS E2 (right), DDM source 1 Yellow
    E22-P2 E2-J1-2 DC-UPS E2 (right), DDM source 2 Yellow
    E23-P1 E1-J2-2 DC-UPS E1 (left), main source 2 Green
    E23-P2 E1-J2-3 DC-UPS E1 (left), main source 3 Green
    E24-P1 E2-J2-2 DC-UPS E2 (right), main source 2 Yellow
    E24-P2 E2-J2-3 DC-UPS E2 (right), main source 3 Yellow
    Table 6. PDU-to-DC-UPS cabling - Racks 3, 4, 5 (Models 981, 98E with three-phase power; Models 986, 86E); Rack 3 (Models 988, 88E)
    PDU port Connects to Connection description PDU group
    Note: For further guidance on the connects to locations in this table, refer to Rack power and cooling location codes.
    E21-P1 E1-J1-1 DC-UPS E1 (left), DDM source 1 Green
    E21-P2 E1-J2-1 DC-UPS E1 (left), main source 1 Green
    E22-P1 E2-J1-1 DC-UPS E2 (right), DDM source 1 Yellow
    E22-P2 E2-J2-1 DC-UPS E2 (right), main source 1 Yellow
    E23-P1 E1-J1-2 DC-UPS E1 (left), DDM source 2 Green
    E23-P2 E1-J1-3 DC-UPS E1 (left), DDM source 3 Green
    E24-P1 E2-J1-2 DC-UPS E2 (right), DDM source 2 Yellow
    E24-P2 E2-J1-3 DC-UPS E2 (right), DDM source 3 Yellow
    Figure 3. Locations for power distribution unit (PDU) connectors
    Locations for power distribution unit (PDU) connectors
  5. Unlatch and disconnect all power output cables J1-J12 (Figure 3).
  6. Unlatch and remove any filler plugs from the PDU. Move them to the new PDU and install them on the same connectors.
  7. If the new PDU has a yellow and green ground cable pre-attached, disconnect the existing yellow and green ground cable from the rack.
    Retain the nut and star washer for use with the new PDU.
  8. If the new PDU does not have a yellow and green ground cable pre-attached, disconnect the existing ground cable from the old PDU.
    Retain the nut and star washer for use with the new PDU.
  9. Loosen the two screws securing the PDU to the rack. Remove the PDU.
    Note: To remove the PDU, it might be necessary to temporarily unfasten and move other items such as 12V power supplies or the document enclosure. This can be done while the power supplies are operating.

Install the power distribution unit (PDU)

Procedure

  1. Install the new PDU and tighten the two screws to secure it to the rack.
  2. Connect the yellow and green ground cable.
    1. Place the star washer onto the threaded stud.
    2. Place the PDU ground cable lug on the threaded stub.
    3. Secure the ground lug with the lock nut.
  3. Connect the two PDU power input cable plugs P1 and P2 to the associated DC-UPS DSU power connectors. See Table 2 for the connections that apply to the PDU you are replacing.
    Note: Cross-connecting these two cables can cause problems and can cause manual power isolation procedures to fail.
  4. Connect and latch the PDU output power cables J1-J12 (Figure 3).
  5. Refasten any items moved during this procedure; for example, the document enclosure or any power supplies.
  6. Close the rear door.
  7. Exit this service information center parts exchange procedure and return to the procedure that sent you here.