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Step 0610-005
When you put the circuit breaker into the On (‘1’) position, the circuit breaker tripped into the Off (‘0’)
position.
1. Have the customer remove the SP Switch from the active configuration and power off the SP Switch.
2. Put the switch into service position (refer to “Service position procedures” on page 3-9).
3. Go to “Step 0610-010” on page 1-16
Step 0610-006
When you put the circuit breaker into the On (‘1’) position, the circuit breaker stayed in the On (‘1’)
position.
1. From the control workstation or SP Switch, check Power (green) LED for this switch.
2. Is the Power (green) LED lit?
v If the Power (green) LED is not lit, go to “Step 0610-007”.
v If the Power (green) LED is lit:
a. You have resolved the SP Switch problem.
b. Go to “SP Switch function (MAP 0620)” on page 1-17 and refer to “Step 0620-043” on
page 1-36.
Step 0610-007
The Power (green) LED is not lit.
1. Check processor nodes or SP Switches on any other dc power harness for any that are powered on.
2. Ensure that the other processor node or SP Switch has its circuit breaker in the On (‘1’) position.
3. Check the Power (green) LED for an On or Flashing condition.
4. Processor nodes and SP Switches receive 48-volt power from one of five power harnesses. The sets
are as follows:
PDU-BH-P1: Frame slots 1, 2, 3, 4
PDU-BH-P2: Frame slots 5, 6, 7, 8
PDU-BH-P3: Frame slots 9, 10, 11, 12
PDU-BH-P4: Frame slots 13, 14, 15, 16
PDU-BH-P5: Frame slot 17
5. Is the Power (green) LED on other processor nodes or SP Switches On or Flashing?
v If yes, go to “Step 0610-008”.
v If no, go to ″Main power (MAP 0450)″ in
RS/6000 SP: System Service Guide
.
Step 0610-008
You found that the Power (green) LED on other processor nodes or switch assemblies is On or Flashing
1. If there is only one SP Switch on the dc power harness, skip the next item and answer “Yes” to the
question below.
2. Check all other SP Switches on the same dc power harness as the failing SP Switch and look for the
same symptom.
v Look for the circuit breaker on but the Power (green) LED is not lit.
3. Is this the only SP Switch showing this symptom?
v If yes, go to “Step 0610-009”.
v If no, you have a problem with 48 V dc power distribution.
a. Go to ″Open in 48 V dc distribution (MAP 0560)″ in
RS/6000 SP: System Service Guide
.
Step 0610-009
Only one SP Switch is showing the circuit breaker on but the Power (green) LED is not lit.
1. Check cable connections at the frame power unit (see “Step 0610-007”) and at the SP Switch
bulkhead (BH-J1) for good connections.
2. Are the connections good?
SP Switch power (MAP 0610)
Chapter 1. Maintenance Analysis Procedures (MAPs) 1-15