Nevion FR202 - Manual (Page 25)

FR-2RU-20-2 Rev. A
nevion.com | 25
5.9 Fans
5.9.1 Fan operation
The fans at the front provide sufficient cooling for modules and power supplies in every
allowed load situation. Their speed is controlled by control circuits in the power supplies
based on their internal temperature. The fan speed is individually and continuously
checked, and if a fan has a speed outside expected limits, it will be reported to Multicon as
being defective and the lower LED at the fan front will change to red.
Having one defective fan in the frame shall not be considered as an emergency situation
since the total needed air flow will be maintained by an increase in speed for the remaining
fans.
Removing the fan front in a live frame may cause malfunction or damage to modules due to
excessive heat and should, as a rule, never be done.
To maintain optimal cooling, all air flow openings in the chassis must be kept uncovered.
5.9.2 Replacing defective fans
Changing a defective fan should be performed at a non-live frame.
Procedure;
Please contact Nevion’s customer support department.