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What should I do if all or some of the fans in a NetShelter CX fail or are noisy?

Issue:
NetShelter CX fan is noisy or has failed.

Product Line:
NetShelter CX
 
Environment:
All versions and serial ranges.
 
Cause:
There are several possible causes for fans to be noisy or fail.
 
Resolution:
 

All fans in the fan tray stop.

Possible cause - Power supply has failed: broken wire or loose connection.
Field solution - Check that the power supply unit LED is illuminated.
                       Check all power connections to PSU and fan tray and if necessary, change the power supply.

Single fan failure

Possible cause - Damaged fan frame, failed bearing etc.
Field Solution - Replace fan tray.

Noisy Fan  

Bearing noise or ticking blades.
Possible cause - Distorted or broken fan frames, bearing lubricant failed due to age or excessive temperatures or something catching the blades such as tape. etc.
Field solution - Check for anything interfering with free rotation of the blades. Check to make sure fan is seated correctly in the fan tray. If nothing is obvious, change the fan tray.
 
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