HP Fabric Clustering System HP-UX Administrator's Guide, March 2008

Power Supply Troubleshooting
Both power supply modules connect internally to the same power bus. If one power supply
module fails, the other immediately takes over. A power supply module may be hot-swapped
without any disruption in power. Check the status indicators of both power supply modules.
Power Supply 1 is on the left of the switch, Power Supply 2 is on the right, and they are both
labeled.
Power supply status LEDs are on the front located in the middle of each power supply, and are
visible through the mesh of the bezel. If a power supply needs to be replaced, see “Replacing a
Power Supply Module” (page 128).
Table 7-4 Power supply/ Fan Status LED Indicator
FunctionColor
Fan-tray status indicator:
Yellow
-over-
Green
DecodeYellowGreen
No system power or LED failureOffOff
Power Supply/Fan running with no errors detected.XOn
Power Supply / Fan error detected. Operation
intervention required.
OnX
FRU identifyBlink
(1/2 second)
Off
NOTE: It is possible that with a failed power supply, the System Status LED is yellow, and the
Power Supply LED stays green.
The following command can be used on the switch to show power supply status from the CLI,
and shows an example of a failed Power Supply.
HP-IB> show power
================================================================================
Power-supply Information
================================================================================
ps type oper-status utilization voltage
--------------------------------------------------------------------------------
1 AC up 15 12
2 AC failure na 12
================================================================================
Power-supply Seeprom
================================================================================
product pca pca fru
ps serial-number serial-number number number
--------------------------------------------------------------------------------
1 ZDHZ0101 - - 98-00109-01
2 ZDHZ0107 - - 98-00109-01
The following is an example of the right side power cord missing.
HP-IB> show power
================================================================================
Power-supply Information
================================================================================
ps type oper-status utilization voltage
--------------------------------------------------------------------------------
1 AC down 0 12
2 AC up 12 12
112 Monitoring and Troubleshooting