HP ProLiant Gen8 Troubleshooting Guide Volume I: Troubleshooting

Hardware problems 52
Fan problems
General fan problems are occurring
Action:
1. Be sure the fans are properly seated and working.
a. Follow the procedures and warnings in the server documentation for removing the access panels
and accessing and replacing fans.
b. Unseat, and then reseat, each fan according to the proper procedures.
c. Replace the access panels, and then attempt to restart the server.
2. Be sure the fan configuration meets the functional requirements of the server. See the server
documentation.
3. Be sure no ventilation problems exist. If you have been operating the server for an extended period of
time with the access panel removed, airflow may have been impeded, causing thermal damage to
components. For further requirements, see the server documentation.
4. Be sure no POST error messages are displayed while booting the server that indicate temperature
violation or fan failure information. For the temperature requirements for the server, see the server
documentation.
5. Use HP iLO or an optional IML viewer to access the IML to see if any event list error messages relating
to fans are listed. For more information about event list error messages, see "Error message resources
(on page 86)."
6. In the iLO web interface, navigate to the Information > System Information page and verify the
following information:
a. Click the Fans tab and verify the fan status and fan speed.
b. Click the Temperatures tab and verify the temperature readings for each location on the
Temperatures tab. If a hot spot is located, then check the airflow path for blockage by cables and
other material.
7. Replace any required non-functioning fans and restart the server. For specifications on fan
requirements, see the server documentation.
8. Be sure all fan slots have fans or blanks installed. For requirements, see the server documentation.
9. Verify the fan airflow path is not blocked by cables or other material.
10. For HP BladeSystem c-Class enclosure fan problems, review the fan section of OA SHOW ALL and the
FAN FRU low level firmware. For more information, see the HP BladeSystem c-Class Enclosure
Troubleshooting Guide on the HP website
(http://www.hp.com/support/BladeSystem_Enclosure_TSG_en).
Hot-plug fan problems are occurring
Action:
1. Check the LEDs to be sure the hot-plug fans are working. Refer to the server documentation for LED
information.
NOTE: For servers with redundant fans, backup fans may spin up periodically to test
functionality. This is part of normal redundant fan operation.
2. Be sure no POST error messages are displayed.