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In this Document

Purpose

Troubleshooting Steps

References

Created from <SR 3-4044816281>

Applies to:

Purpose

This document addresses power, voltage, or Power Supply Unit warnings or failures on Sun Fire [TM] V480, V490, V880, V890 systems.

This document covers situations where the system is powered on, but warnings, errors, or suspected failed Power Supplies exist in the current configuration.

Symptoms:

• The issue may be described as a "power supply failure".
• There may be no lights or LEDs lit on individual Power Supply Unit(s).
• There may be an amber LED ("wrench" or warning LED) lit on Power Supply Unit(s).
• There may be power warnings, voltage warnings, or i2c messages associated with a Power Supply Unit.

Troubleshooting Steps

Please validate that each troubleshooting step below is true for your environment. The steps will provide instructions or a link to a document, for validating the step and taking corrective action as necessary. The steps are ordered in the most appropriate sequence to isolate the issue and identify the proper resolution. Please do not skip a step.

1. Verify external power is present for the system.

• Confirm that the system LEDs are lit, fans are spinning, and the RSC is responsive or you are able to login to the RSC or domain.

2. Verify that all the PSU breakers are on AND the power cords are connected.

• Check incoming power. Confirm that the power cord(s) are connected securely at both ends and that the incoming power source is known to be operational and within the required specifications. (ref. specific system using online SSH, click on Hardware Specifications under the Information Areas for exact power requirements)
• If uncertain check for tripped circuit breaker, blown fuse, etc. Reseat power cord(s) at both ends.
• Reference the appropriate System Service Manual (the Power section) for diagrams and instructions relating to where the breakers are located
  • Sun Fire V480 Server Parts Installation and Removal Guide
  • Sun Fire V490 Server Parts Installation and Removal Guide
  • Sun Fire v880 Server Service Manual
  • Sun Fire v890 Server Service Manual

3. If possible (no impact for system functionality and CU availability) check if the power source is really providing power.

• swap power cables between PSUs if possible
• check with an electrician if power is provided

4. Verify that all the PSU are properly seated.

• Gently push on the power supply to insure it is flush and properly seated in its location.

5. Verify the PSU still fails after replacing power supply.

• Once the power supply has been replaced and is continuing to show as either failed, faulted or LED's are still solid amber, verify the replacement power supply is not DOA (Dead On Arrival). If possible, swap the power supply with a known good power supply from another system. If the suspect power supply fails in another slot, and PS in the swapped slot now shows as OK or LED is green, the replacement is DOA and will need to be replaced.

6. Verify known issues.

• FCO A0308-1: Hardware: Reactive: After system power down one of the PSUs in Sun Fire V890 may not turn back on at power up. (Doc ID 1021640.1
  • typical error messages:
    • WARNING: PSx Undercurrent on one or more DC lines
      WARNING: Power Supply overcurrent detected
      WARNING: Power Supply at 95% current. Remove some load.
      WARNING: Device PSx failure detected

• prtdiag reports failed PSU as GOOD, See BUG 15470639
  • Fixes are:
  • Solaris 8: 111792-17
  • Solaris 9: 128199-02
  • Solaris 10: 138127-01

Following are some examples of PSU issues collected from Prtdiag and messages files.

Example below on PS2 (solution has been to replace PSU2):

picld logs:

Another example (solution has been to check proper seating/power cord connection):

picld logs:

Again another one (solution has been to reconnect the power cable on PSU2)

This solution has no attachment