MAP2740 Power distribution unit (PDU) isolation (Models 98x)

MAP2740 Section-1

Procedure

  1. Select the rack model that applies:
  2. You have been sent to this MAP because one or more power supplies (CEC, IO, or storage enclosure) receiving power from a PDU is reporting missing input. This MAP uses visual symptoms to isolate the problem.
  3. If you suspect the power cables that are connected to the PDU are incorrectly connected, refer to Power distribution cables to determine the proper point-to-point cabling for each rack.
  4. At the rear of the rack with the failure, locate the four PDUs (E21 - E24). Refer to the location codes in the serviceable event FRU list to determine the rack with the failure.
    Figure 1 shows Rack-1; racks 2, 3, 4, and 5 are similar.
    Figure 1. Model 98x base rack locations.
    Note: Models 980, 981, and 982 are shown. PDU locations are similar for models 984, 985, 986, and 988.
    Model 980, 981, 982 base rack locations
  5. On each PDU, locate the two sets of output power LEDs. One set is for the upper connectors J1-J6, the other set is for the lower connectors J7-J12 (Figure 2).
    • The upper six output connectors (J1-J6) share power from input cable P1.
    • The lower six output connectors (J7-J12) share power from input cable P2.
    • Each output power connector is protected by an internal fuse that is not repairable.
    • Each output power connector has an associated green LED that is lit when the fuse is good and output power is present.
    Figure 2. Locations for power distribution unit (PDU) connectors
    Locations for power distribution unit (PDU) connectors
    Attention: If you are here for a high-performance flash enclosure problem that occurred while installing that enclosure (as part of a flash enclosure MES or an expansion rack installation), you analyze and repair the problem by finding the condition that applies in Table 1. Later, you use MAP2740 Section-5 PDU and power supply isolation during flash enclosure installation to complete the repair.
  6. Observe the 12 green LEDs on each PDU. Find the condition that applies:
    Table 1. LED conditions on each PDU
    If this condition applies: Go to:
    One of the J1-J6 LEDs is not lit; the remaining five LEDs are lit. MAP2740 Section-2 PDU LEDs J1-J6 or J7-J12, one LED is not lit
    One of the J7-J12 LEDs is not lit; the remaining five LEDs are lit.
    J1-J6 LEDs are all not lit. MAP2740 Section-3 PDU LEDs J1-J6 or J7-J12, six LEDs are not lit
    J7-J12 LEDs are all not lit.
    All green LEDs on each PDU are lit. MAP2740 Section-4 PDU LEDs J1-J12 are all lit.

MAP2740 Section-2 PDU LEDs J1-J6 or J7-J12, one LED is not lit

About this task

The PDU output fuse is blown by either an over-current condition in the connected power supply or a short in the interconnect cable.

Procedure

  1. Inspect the interconnect cable from end-to-end for damage.
  2. Verify that the power supply input power LED is off.
  3. Determine the location code of the PDU with the failing port. (Figure 1.)
  4. Determine the location code of the power supply that is connected to the failing PDU port. Refer to Location codes.
  5. Display open serviceable events details and one that lists the power supply location code in the FRU list.
  6. The possible failing FRUs are the power supply, the PDU, and the interconnecting power cable.
  7. If the cause of the blown fuse cannot be determined, it is recommended that you replace the power supply and the PDU.
    1. Replace both the power supply and the PDU at one time by using the PDU parts exchange procedure.
      Refer to step 9 for more information on starting the repair.
    2. After both the power supply and PDU have been replaced, complete a pseudo-repair on the power supply to update enclosure status.
    3. Go to step 10.
  8. If the cause of the blown fuse is known, the power supply or interconnecting cable are replaced using the power supply parts exchange procedure. The PDU is replaced using the PDU parts exchange procedure.
  9. If you found the FRU and specific location code in a serviceable event FRU list, use normal serviceable event FRU replace procedures to replace the FRUs. If the FRU was not found in a serviceable event FRU list, use MAP1230 Replace a FRU without using a serviceable event.
  10. Are you here for a high-performance flash enclosure problem that occurred while installing that enclosure?

MAP2740 Section-3 PDU LEDs J1-J6 or J7-J12, six LEDs are not lit

About this task

Six PDU connectors are not receiving common power from the PDU input cable. The PDU input cable receives power from a DC-UPS DSU output connector. The DC-UPS-DSU output connector has a green LED that indicates output power is present.

Procedure

  1. At the top of the DSU, observe the:
    • For single-phase:
      • Two DDM output LEDs Callout label 1 for connectors J1-1, J1-2. See Figure 3.
      • Two main output LEDs Callout label 2 for connectors J2-1, J2-2. See Figure 3.
    • For three-phase:
      • Three DDM output LEDs Callout label 1 for connectors J1-1, J1-2, J1-3. See Figure 4.
      • Three main output LEDs Callout label 2 for connectors J2-1, J2-2, J2-3. See Figure 4.

    Are all four LEDs on the single-phase DSU or all six LEDs on the three-phase DSU lit?

    • Yes, go to step 3.
    • No, go to step 2.
    Figure 3. LEDs on the DC-UPS DC Supply Unit (DSU) (Models 98x, single-phase power) (rear)
    LEDs on the DC-UPS DC Supply Unit (DSU) (Models 98x, 8xE), rear of rack
    Figure 4. LEDs on the DC-UPS DC Supply Unit (DSU) (Models 98x, three-phase power) (rear)
    LEDs on the DC-UPS DC Supply Unit (DSU), rear of rack
  2. A DSU output LED is off. The DSU should detect and report its output error and cause a serviceable event to be opened.
    1. The left (facing rear of rack) DSU location code is E1. The right (facing rear of rack) DSU location code is E2.
    2. If the DSU is listed in an open serviceable event FRU list, replace the DSU using standard serviceable event repair procedures.
    3. If the DSU is not listed in an open serviceable event FRU list, replace the DSU using MAP1230 Replace a FRU without using a serviceable event.
  3. All DSU output LEDs are lit. The PDU still has a group of six output LEDs not lit.
    1. If the PDU output LEDs J1-J6 are not lit, ensure that PDU cable P1 is properly connected to the DSU output.
    2. If the PDU output LEDs J7-J12 are not lit, ensure that PDU cable P2 is properly connected to the DSU output.
    3. Were any cables between the DSU and PDUs disconnected or improperly connected?
      • Yes, go to step 4.
      • No, go to step 6.
  4. One or more interconnect cable connections between the DSU and PDUs were found disconnected.
    1. Record the locations of the affected DSU ports.
    2. Reconnect the cable or cables.
  5. Power should now be restored to the affected power supply units.
    Exit this MAP and complete a pseudo-repair of the affected DSU, then close the related serviceable events.
    1. Exit the MAP to return to the screen that sent you here.
    2. To the question, "What was the result of using the service procedure from Infocenter?" click Problem not fixed and then click Next.
    3. To the question, "Did you exchange any parts?" click No and then click Next.
    4. To the question, "Did you isolate the problem?" click Yes and then click Next.
    5. In the Select all the failing FRUs windows that follow, select the affected DSU for repair.
      1. If the affected DSU appears in the first window, select the DSU, then select All failing FRUs have been selected and click Next.
      2. If the affected DSU does not appear in the first window, select Show more FRUs and click Next. Locate the affected DSU, select it, and click Next.
        Note: If you cannot locate the affected DSU in the Select all the failing FRUs windows, you can select Delay the repair, exit, and use Exchange Parts menu to complete the repair: Storage Facility Management > storage facility > Exchange Parts > Exchange Rack Components...
      3. Complete the service action. There is no need to disconnect any cables or remove any parts.
    6. Close the serviceable event that referred you to MAP2740, if it is not already closed.
    7. Go to step 7.
  6. Replace the affected PDU. After the PDU has been replaced, return here and go to step 7.
    1. If the PDU is listed in an open serviceable event FRU list, replace the PDU using standard serviceable event repair procedures.
    2. If the PDU is not listed in an open serviceable event FRU list, replace the PDU using MAP1230 Replace a FRU without using a serviceable event.
  7. Are you here for a high-performance flash enclosure problem that occurred while installing that enclosure?

MAP2740 Section-4 PDU LEDs J1-J12 are all lit

Procedure

  1. Use the following to continue the repair:
    1. The PDU output LEDs indicate that all output connectors are providing power.
    2. PDU output connectors that are not used for the features present on this rack should have protector covers installed.
    3. All PDU output connectors that do not have protector covers should have cables plugged.
    4. If there is a PDU output connector with no cable and no protector cover, stop and correct this. Look for a cable that is hanging free. These cables have location code labels at both ends that indicate where to plug them. Refer to Power distribution cables to determine the proper point-to-point cabling for each rack.
  2. You were sent to this MAP by a serviceable event FRU list that contained MAP2740 and one or more power supplies.
    1. Using the FRU list location code, find the power supply that is reporting the missing input power. Refer to Location codes in serviceable events to convert location codes to physical locations.
    2. If the power supply input power LED is lit, either the problem is no longer occurring or the power supply has an internal fault and needs to be replaced. If you replace the power supply, use normal serviceable event FRU exchange procedures. Go to step 3.
    3. If the power supply input power LED is lit, and you choose not to replace the power supply but you reconnected the power cable between this power supply and the PDU in step 1, complete a pseudo-repair of the power supply. Go to step 3.
    4. If the power supply input power LED is not lit, either the problem is the power supply or the cable to the PDU. Use normal serviceable event FRU exchange procedures to replace the FRUs. Go to step 3.
  3. You are here to perform a repair or pseudo-repair of the power supply.
    Note: Use the Help menu to launch a copy of this MAP. Refer to that copy when the repair or pseudo-repair is complete.
    1. Exit the MAP to return to the screen that sent you here.
    2. To the question, "What was the result of using the service procedure from Infocenter?" click Problem not fixed and then click Next.
    3. To the question, "Did you exchange any parts?" click No and then click Next.
    4. To the question, "Did you isolate the problem?" click No and then click Next.
    5. The next FRU in the list is displayed. Repair or pseduo-repair this FRU (the power supply).
    6. Ensure the serviceable event is closed when you are done, then return here and go to step 4.
  4. Are you here for a high-performance flash enclosure problem that occurred while installing that enclosure?

MAP2740 Section-5 PDU and power supply isolation during flash enclosure installation

About this task

You are using MAP2740 to isolate a power problem that occurred while installing a high-performance flash enclosure. You have corrected the problem and can now complete a pseudo-repair on one or both power supplies in the enclosure to complete any required firmware updates.

Procedure

  1. Did you complete an actual replacement or a pseudo-repair of a power supply in the affected high-performance flash enclosure?
    • Yes, a flash enclosure power supply was replaced. Go to step 2.
    • Yes, a flash enclosure power supply was pseudo-repaired. Go to step 2.
    • No, a flash enclosure power supply was not replaced or pseudo-repaired. Go to step 3.
  2. Complete a pseudo-repair of the other power supply in the high-performance flash enclosure. This completes the service action.
  3. Complete a pseudo-repair of both power supplies in the high-performance flash enclosure, one at a time. This completes the service action.

MAP2740 Section-6 Enclosure power input problem (Model 983)

About this task

You are using MAP2740 Power distribution unit (PDU) isolation (Models 98x) to isolate power input problem to a CEC enclosure, I/O enclosure (2U), or storage enclosure (24 drive slots).

Procedure

  1. Is there an open serviceable event for a UPS power failure, or containing a UPS FRU?
    • Yes. Exit this MAP and start the repair using that serviceable event.
    • No, go to step 2.
  2. The FRU list that sent you here listed an enclosure in FRU 2. Select the listed enclosure.

MAP2740 Section-7 CEC enclosure power input problem (Model 983)

Procedure

  1. Locate the CEC enclosure power supply by using the location code from the serviceable event FRU list that sent you here. See Figure 5.
    Figure 5. Location codes for CEC enclosure (rear view) (Models 983)
    CEC enclosure location codes (rear view)
  2. Observe the failing CEC enclosure power supply LEDs. See Figure 6.
    Is the AC input green LED lit?
    • Yes. The failure is in the CEC enclosure. Exit this MAP and replace the next FRU in the FRU list.
    • No. Go to step 3.
    Figure 6. Location of the CEC enclosure power supplies and LEDs (Model 983)
    Location of the power supplies and LEDs (Model 980)
  3. Is the power cable connected and fully seated at the CEC enclosure power supply and UPS? See Table 2, Figure 6, Figure 7, and Figure 8.
    • Yes. Go to step 4.
    • No. Exit this MAP and select the power supply in the FRU list. When directed to replace it, correct the power cable problem.
    Table 2. CEC enclosure power cables from UPS
    CEC enclosure CEC enclosure power input connector UPS UPS power output connector
    XC1 (upper) E1 (green) E61 (upper) J6 (green)
    XC1 (upper) E2 (yellow) E62 (lower) J6 (yellow)
    XC2 (lower) E1 (green) E61 (upper) J7 (green)
    XC2 (lower) E2 (yellow) E62 (lower) J7 (yellow)
    Figure 7. UPS output power cables to enclosures (rear)
    UPS to enclosure power supply cables (Model 983)
    Figure 8. Location codes for the UPS (Model 983), rear view
    Location codes for the UPS (Model 983), rear view
  4. Unplug the power cable from the CEC enclosure power supply.
    Use an approved voltmeter set to measure rack line cord voltage. Measure the voltage at the end of the cable.
    Is the voltage correct?
    • Yes, the CEC enclosure power supply is receiving input power. Exit this MAP and replace the power supply. It will be the next FRU in the FRU list.
    • No, go to step 5.
  5. Unplug the power cable from the UPS output connector. Use the voltmeter to measure the voltage at the UPS output connector.
    Is the voltage correct?
    • Yes. Exit this MAP and replace the power cable. The cable will not be in the FRU list. To replace the cable, do a pseudo repair of the CEC enclosure power supply. When you are directed to replace the power supply FRU, do not, instead replace the cable.
    • No. Exit this MAP and replace the UPS. If the UPS is not in the FRU list that sent you here, use MAP1230 Replace a FRU without using a serviceable event.

MAP2740 Section-8 I/O enclosure (2U) power input problem (Model 983)

Procedure

  1. Locate the I/O enclosure (2U) power supply using the location code from the serviceable event FRU list that sent you here. See Figure 9.
    Figure 9. Location codes for I/O enclosure (2U) (rear view) (Models 983)
    I/O enclosure (2U) locations (front) (model 983)
  2. Observe the failing I/O enclosure power supply LEDs. See Figure 10.
    Is the power input green LED Callout label 1 lit?
    • Yes. The failure is in the I/O enclosure. Exit this MAP and replace the next FRU in the FRU list.
    • No. Go to step 3.
    Note: The next step checks the power cables between the UPS output connector and the I/O enclosure power supply input connector.
    • The power cable from the UPS connects to the rear left of the I/O enclosure. The cables and connectors are color coded.
    • There are two permanently installed power cables inside the enclosure going from the rear connectors to the power supply connectors at the front of the enclosure. To replace an internal power cable, the entire sheet metal enclosure must be replaced. The enclosure contains two power cables and also the front LED indicator cable assembly. The customer will not have access to their data during the FRU replace.
    Figure 10. Location of the I/O enclosure power supply LEDs (Model 983)
    Management enclosure power supply LEDs
  3. Ensure the three cable connections are connected and fully seated. See Table 3.
    1. Cable connection at enclosure power supply (front). See Figure 9.
    2. Cable connection at enclosure (rear). See Figure 12.
    3. Cable connection at UPS (rear). See Figure 13.

    Are the power cables connected and fully seated?

    • Yes. Exit this MAP and replace the next FRU in the FRU list.
    • No. Exit this MAP and select the I/O enclosure power supply in the FRU list. When directed to replace it, connect the power cable instead.
    Table 3. I/O enclosure power cables from UPS
    I/O enclosure I/O enclosure power supply input connector
    (front of rack)    		 I/O enclosure power input connector
    (rear of rack)    		 UPS UPS power output connector
    1 EI (green, top) E1 (green, left) E61 (upper) J5 (green)
    1 E2 (yellow, rear) E2 (yellow, right) E62 (lower) J5 (yellow)
    Figure 11. UPS output power cables to enclosures (rear)
    UPS to enclosure power supply cables (Model 983)
    Figure 12. I/O enclosure (2U) locations code (rear) (model 983) 1G3, 1G4
    I/O enclosure (2U) locations code (rear) (model 983) with logical IG3, 1G4
    Figure 13. Locations, UPS connectors (rear)
    Location codes for the UPS (Model 983), rear view

MAP2740 Section-9 Flash enclosure power input problem (Model 983)

Procedure

  1. Locate the storage enclosure power supply using the location code from the serviceable event FRU list that sent you here. See Figure 14.
    Figure 14. Location codes for storage enclosure (rear view) (Flash enclosure, 24 drive slots)
    Storage enclosure locations (rear view) (SAS flash enclosure, 24 drive slots)
  2. Observe the failing storage enclosure power supply LEDs. See Figure 15.
    Is the IN Callout label 1 green LED lit?
    • Yes. The failure is in the Flash enclosure. Exit this MAP and replace the next FRU in the FRU list.
    • No. Go to step 3.
    Figure 15. Location of the storage enclosure power supplies and LEDs (Model 983)
    Storage enclosure power supply LEDs
  3. Is the power cable connected and fully seated at the flash enclosure power supply and UPS? See Table 4, Figure 14, Figure 15, and Figure 16.
    • Yes. Go to step 4.
    • No. Exit this MAP and select the flash enclosure power supply in the FRU list. When directed to replace it, connect the power cable.
    Table 4. Flash enclosure power cables from UPS
    Storage module Flash enclosure Flash enclosure power input connector UPS UPS power output connector
    I1 F03 (upper) E1 (green) E61 (upper) J3 (green)
    I1 F03 (upper) E2 (yellow) E62 (lower) J3 (yellow)
    I1 F04 (lower) E1 (green) E61 (upper) J4 (green)
    I1 F04 (lower) E2 (yellow) E62 (lower) J4 (yellow)
    Figure 16. UPS output power cables to enclosures (rear)
    UPS to enclosure power supply cables (Model 983)
    Figure 17. Locations, UPS connectors (rear)
    Location codes for the UPS (Model 983), rear view
  4. Unplug the power cable from the flash enclosure power supply.
    Use an approved voltmeter set to measure rack line cord voltage. Measure the voltage at the end of the cable.
    Is the voltage correct?
    • Yes. The flash enclosure power supply is receiving input power. Exit this MAP and replace the power supply. It will be the next FRU in the FRU list.
    • No, go to step 5.
  5. Unplug the power cable from the UPS output connector.
    Use the voltmeter to measure the voltage at the UPS output connector.
    Is the voltage correct?
    • Yes. Exit this MAP and replace the power cable. The cable will not be in the FRU list. To replace the cable, do a pseudo repair of the flash enclosure power supply. When directed to replace the power supply FRU, do not, instead replace the cable.
    • No, exit this MAP and replace the UPS. If the UPS is not in the FRU list that sent you here, use MAP1230 Replace a FRU without using a serviceable event.