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PSU reports DC FAIL, AC FAIL, OFF

  1. Last updated
    Apr 17, 2025
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Category:
disk-shelves
Specialty:
HW
Last Updated:
4/17/2025, 8:18:43 AM

Applies to

  • AFF and FAS systems
  • ONTAP 9
  • Power supply unit (PSU)

Issue

  • EMS reports the following error message.

[Node-A: statd: monitor.shelf.fault:alert]: Critical fault reported on disk storage shelf attached to channel 0a. Check fans, power supplies, disks, and temperature sensors.
[Node-A: statd: callhome.shlf.fault:error]: Call home for SHELF_FAULT
[Node-A: dsa_worker4: ses.status.psError:alert]: DS212-12 (S/N SHFNCXXXXXXXXXX) shelf 0 on channel 0b power error for Power supply 2: critical status; AC Fail. This module is on the rear of the shelf at the bottom right.
[Node-A: dsa_worker4: callhome.shlf.power.intr:error]: Call home for SHELF POWER INTERRUPTED

  • storage show fault shows PSU is CRITICAL.

Power Supplies:
Element Status         Status Bytes  Status Descriptions
  1: CRITICAL          02,00,00,F1   DC FAIL, OFF, RQSTED ON, FAIL
  2: OK                01,00,00,20   RQSTED ON

OR

Element Status         Status Bytes  Status Descriptions
  1: CRITICAL          02,00,00,F3   DC FAIL, AC FAIL, OFF, RQSTED ON, FAIL
  2: OK                01,00,00,20   RQSTED ON
 
Fans:
Element Status         Status Bytes  Status Descriptions
  1: CRITICAL          02,00,00,F0   OFF, FAIL
  2: CRITICAL          02,00,00,F0   OFF, FAIL
  3: OK                01,01,2C,21
  4: OK                01,01,29,21

Enclosure:
Element Status         Status Bytes  Status Descriptions
  1: OK                01,00,02,00   FAIL

Voltage Sensors:
Element Status         Status Bytes  Status Descriptions
  1: UNRECOVERABLE     04,00,00,00
  2: UNRECOVERABLE     04,00,00,00
  3: OK                01,00,01,FB
  4: OK                01,00,04,C6

  • The affected PSU lights amber LED.

 

 

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