DS8000 Service Documentation Version 7.5

Rack power and cooling LED indicators (Models 961, 96E)

This section contains rack power and cooling FRUs that have LED indicators. Each listed assembly is shown with a description of its LEDs. Although LED indicators may indicate a failure, they should not be used as a starting point for a repair.

Rack power and cooling FRUs with LEDs

Table 1. Parts of the rack power and cooling assembly that contain LEDs
Assembly Reference
Battery service module (BSM) set Figure 2
DC-UPS DC supply unit (DSU) Figure 1
Local remote switch card Figure 4
Power distribution unit Figure 3
Power junction assembly (PJA) Figure 8
Rack identity card Figure 5
Rack operator panel assembly Figure 6
RPC card Figure 7

LEDs on the DC Supply Unit (DSU)

Figure 1. LEDs on the DC-UPS DC Supply Unit (DSU), rear of rack
LEDs on the DC-UPS DC Supply Unit (DSU), rear of rack
Table 2. Interpreting LEDs on the DC Supply Unit (DSU), rear of rack
Index LED Function Color LED Off LED On LED Flash
1 DDM output Green Output off Normal Error1
2 Main output Green Output off Normal Error1
3 Input from partner DSU Green Error1 Normal N/A
4 Digital status code display2        
5 LOCAL AC (input) Green Input off Normal Error
6 DSU SERVICE Amber Normal Error Identify
7 AC MISMATCH (input) Amber Normal Error N/A
8 Processor is operational3 Green Error N/A Normal
Notes:
  1. Error on local or partner DSU. Repair using serviceable event.
  2. See MAP2341 Codes on the DC-UPS DSU status display for status code description. Repair using serviceable event.
  3. This LED is for manufacturing only, it is not used for field service.

LEDs on the Battery Service Module (BSM) set

Figure 2. Battery service module, primary, locations (front)
Battery service module, primary, locations (front)
Table 3. Interpreting LEDs on the BSM set
Index LED Function Color LED Off LED On LED Flash
1 Charger status Green On battery Normal Charging
2 Fault/Identity Amber N/A Fault Identify
3 On Battery Red Normal On battery N/A

LEDs on the Power Distribution Unit

Figure 3. Output power indicator (LED) for a power distribution unit
Output power indicator (LED) for a power distribution unit
Table 4. Interpreting LEDs on the power distribution unit
Index LED Function Color LED Off LED On LED Flash
1 Output power Green Off1 Normal n/a
Note 1: Each power output port is protected by a non-replaceable fuse. If only one output power LED is off, there is a problem with the power distribution unit.

LED on the local remote switch card

Figure 4. Local remote card cables
Model 951, Model 961 "Identify" indicators (LEDs) for local remote and zSeries local remote switch cards
Table 5. Interpreting LEDs on the local remote switch card
Index LED Function Location Color LED Off LED On LED Flash
3 Identify C6 Amber Normal N/A Identify

LEDs on the rack identity card

Figure 5. LEDs on the rack identity card
LEDs on the rack identity card
Table 6. Interpreting LEDs on the rack identity card
Index LED Function Location Color LED Off LED On LED Flash
1 Identify C5 Amber Normal N/A Identify

LEDs on the rack operator panel assembly

Figure 6. Rack operator panel LEDs on upper right of rack front cover
Rack operator panel LEDs on upper right of rack front cover
Table 7. Interpreting LEDs on the rack operator panel assembly
Index LED Function Color LED Off LED On LED Flash
1 Line cord 1 Green 1 2 3
2 Line cord 2 Green 1 2 3
3 Identify or System Attention Amber Normal Attention4
(Rack-1 only)		 Identify4
Notes:
  1. Off under any of the following conditions:
    • Customer power is not present
    • Standby power is present and the Remote Force Power Off is not active
    • The corresponding RPC or DC-UPS is fenced
    • The LED is broken
  2. On solid when DC-UPS DDM power is on.
  3. Flashes slow (1 flash per 2 seconds) when a DC-UPS is in Standby, a DC-UPS is not fenced, or the Remote Force Power Off switch is active. Flashes rapidly (2 flashes per second) during the DC-UPS power ON, power OFF, and Force Power OFF sequences.
  4. This LED is used for the following purposes:
    • For Rack-1 only:

      If the LED is lit solid, it indicates Attention status, which means that one or more open serviceable events needing repair exist.

      When all serviceable events have been closed or cancelled, the LED changes to off.

      When both attention and identify status exist on Rack 1, the identify indication is shown and the LED flashes.

    • For all racks:

      If the LED is flashing, it indicates Identify status, which means the service representative is replacing a part that was selected from a serviceable FRU list or from the Parts Exchange menu option.

      Note: Most, but not all, FRUs have identify indicators. The "light path" identify LEDs are a hierarchy of LEDs that can identify the rack, enclosure, FRU, and even the FRU connector for which a cable is connected.

LEDs on the RPC cards

Figure 7. LEDs on the RPC cards
LEDs on the RPC cards
Table 8. Interpreting upper LEDs on the RPC cards
Index LED Function Color LED Off LED On LED Flash
1 Operational Green Fenced, not booted, or no input power operational N/A
2 Identify Amber Normal 1 Identify
Notes:
  1. When this LED is on solid, the flash memory in the other RPC card is corrupted.
Table 9. Interpreting Lower LEDs on the RPC cards (Only for use by next level of support.)
LED Callout label 3 Status 0 (upper) Callout label 4 Status 1 (lower)
On solid Normal operation Normal operation
1 flash Watchdog timeout history Primary clock check, card is operational
2 flash SSRAM parity check history Other RPC card is fencing this RPC card
3 flash FPGA CRC check history Card ID parity check, card is not operational
4 flash FPGA heartbeat check history RPC power fault
5 flash Code not operational (not used)
OFF Not operational Secondary clock check or not operational

LEDs on the power junction assembly (PJA)

Figure 8. Power junction assembly (PJA) locations
Power junction assembly (PJA) locations
Table 10. Interpreting LEDs on the power junction assembly (PJA)
Index LED Function Color LED Off LED On LED Flash
J1 12V output Green No output power to fan Normal N/A
J2 12V output Green No output power to fan Normal N/A
J3 12V input Green No input power from power supply, 12V Normal N/A
J4 12V output Green No 12V output power to Ethernet switch Normal N/A
J5 12V input Green No input power from power supply, 12V Normal N/A
J6 12V output Green No 12V output power to Ethernet switch Normal N/A
J7 20V input Green No input power from power supply, 20V Normal N/A
J8 20V output Green No 20V output power to management console laptop Normal N/A