Fans running at a higher than expected speed
Symptom
The fans are running at a higher speed than expected.
Cause
• The system temperature sensor is reading within approximately 10°C of the Caution threshold.
• An air baffle or blank is missing or not installed properly and causing a disruption of the airflow.
• The processor heatsink is not installed as indicated in the compute module documentation.
• A supported fan is not installed in the frame.
Action
1. Update the compute module to the latest firmware versions, such as iLO firmware, system BIOS,
option firmware.
2. Verify the Fan status using Fans section of the HPE OneView Enclosures screen.
For more information, see HPE OneView Help or the HPE OneView User Guide on the Hewlett
Packard Enterprise website (
http://www.hpe.com/info/synergy-docs).
3. Verify the Temperature tab in HPE iLO.
Fan speeds can be high if a sensor temperature is within approximately 10°C of the Caution threshold.
4. Verify that all air baffles and required blanks are installed.
Examples of required blanks include drive blanks, processor heatsink blanks, and power supply
blanks.
For product-specific information, see the HPE Synergy documentation in the Hewlett Packard
Enterprise website (http://www.hpe.com/info/synergy-docs).
Excessive fan noise (high speeds)
Symptom
Fans are operating at high speeds with excessive noise.
Cause
Fans can generate noise:
• When running at a high speed (as expected)
• When at low speed if there is an issue with the fan
Action
1. Verify the fan status and fan speed by accessing the Fans view of the HPE OneView Enclosures
screen.
For more information, see the HPE OneView User Guide on the Hewlett Packard Enterprise website
(http://www.hpe.com/info/synergy-docs).
36 Hardware issues
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