IBM RS/6000 SP, Maintenance Information

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MAP 0390: Supervisor Power Problem
MAP 0390: Supervisor Power Problem
Problem detected concerning power in system:
Ÿ Main power switch LED is Off
Ÿ
-AND- PDU rear panel LED is Off
Ÿ
-AND- Frame Supervisor LEDs are Off.
001
– Put main power switch in the Off (‘0’) position.
DANGER
High voltage present at test points. Use high voltage test probes.
– Using a multimeter, check ac phase-to-phase voltage between test points O1 and O2 on ac filter. The
voltage should be in the range 180-254 V ac.
Is there an ac power problem, i.e., ac voltage not in range?
Yes No
002
– Go to Step 033 on page 1-233.
003
Problem with the power coming into the frame.
– Put the RS/6000 SP main circuit breaker in the Off (‘0’) position.
Is there a high-voltage transformer connected to this frame?
Yes No
004
– Have customer put his wall circuit breaker in the On position.
– Check the state of the customer circuit breaker.
Does the customer circuit breaker stay in the On position?
Yes No
005
DANGER
High voltage present. Perform “Lockout/Tagout Procedure for PDU” on page 1-2
or “Lockout/Bagout Procedure for PDU” on page 1-3 to remove primary power
to the frame.
– With power removed, check for a short condition between ac phases using test points 01,
02, and 03 on ac filter.
Do you detect a short condition?
Yes No
006
– Call next level of support.
Chapter 1. Maintenance Analysis Procedures (MAPs)
1-229