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

 

 

 

 

 

 

Color

 

Function

 

 

 

 

 

 

 

 

 

 

 

 

 

Fan-tray status indicator:

 

 

 

 

 

 

 

 

Green

Yellow

 

Decode

 

 

 

 

 

 

Yellow

 

Off

Off

 

No system power or LED failure

 

 

 

 

 

 

On

X

 

Power Supply/Fan running with no errors detected.

-over-

 

 

 

 

 

 

 

Green

 

X

On

 

Power Supply / Fan error detected. Operation

 

 

 

 

 

intervention required.

 

 

 

 

 

 

 

 

Off

Blink

 

FRU identify

 

 

 

(1/2 second)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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