Spirent TestCenter: SPT-9000 chassis showing 'top' power supply AC/transformer failure. Please check that power supply is plugged in and working properly.


Doc ID    KNI16149
Version:    1.0
Status:    Published
Published date:    06/25/2020
 

Symptoms


SPT-9000 chassis showing 'top' power supply AC/transformer failure. Please check that power supply is plugged in and working properly.

20/06/25 01:25:35.477 ERROR 17136 - user.equipment - Detected chassis 135.16.177.59 'top' power supply AC/transformer failure. Please check that power supply is plugged in and working properly.
20/06/25 01:25:35.513 ERROR 17136 - user.equipment - Detected chassis 135.16.177.59 'top' power supply DC Failure failure. Please check that power supply is plugged in and working properly.
20/06/25 01:25:35.543 ERROR 17136 - user.equipment - Detected chassis 135.16.177.59 'top' power supply low voltage alarm. Please check power supply.
20/06/25 01:25:35.566 INFO 17136 - fmwk.bll.core.equip - chassis 135.16.177.59 top power supply voltage = 1.73 volts, current = 0.22 amps
20/06/25 01:25:35.566 INFO 17136 - fmwk.bll.core.equip - chassis 135.16.177.59 'middle' power supply is ok
20/06/25 01:25:35.566 INFO 17136 - fmwk.bll.core.equip - chassis 135.16.177.59 middle power supply voltage = 12 volts, current = 6.38 amps
20/06/25 01:25:35.566 INFO 17136 - fmwk.bll.core.equip - chassis 135.16.177.59 'top' power supply has highest priority status = POWER_STATUS_AC_FAILURE, voltage = 1.73 volts, current = 0.22 amps
20/06/25 01:25:35.566 INFO 17136 - fmwk.bll.core.equip - chassis 135.16.177.59 total disk space(in KB) is 115353600
20/06/25 01:25:35.566 INFO 17136 - fmwk.bll.core.equip - chassis 135.16.177.59 used disk space(in KB) is 18681760


 

Environment

 
  • SPT-9000 chassis
  • 9U chassis
  • power supply issue
  • Power supply AC/transformer failure.

Explanation/Resolution


At the back of your chassis at the bottom section, there are the power supplies, so the one at the failing should show the ALM red LED

There are some steps you can try out:
 
  1. Make sure the power cord for that particular power supply is completely plugged in (you can double-check by pushing it to confirm), also may worth to check the power outlet where this cable is connected to.
  2. Please reseat the power supply that is alarmed, each power supply has a pair of brackets on each side you need to pull out to be able and remove the power supply, take that power supply out for a while, 5 or 10 seconds and insert it again. 
 
I’m not sure if the power supplies on this chassis are hot-swappable, so I would recommend you to when possible, power down the chassis and try this reseat.
 
Make sure to get this done with the right ESD precautions. It doesn't take a day with noticeable static in the air to weaken of fry components.
 
Try to swap the 2 power supplies just to validate the issue is following a particular power supply and not the slot.
Since right now you are using only 1 card on this chassis (EDM) you only need 1 power supply, so the last option is that you can remove the power supply failing from the chassis, and the alarm on the logs should disappear. 

Root Cause

 
  • Power Supply issue

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