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Description
4.5 Dual fan module
Fans
The temperature is sensed at several locations within the NCU.
If natural convection is not sufficient to ensure cooling of the NCU, the two fans in the
dual fan module are switched on automatically. The speed is controlled so that permissible
temperature limit values are maintained at the measuring points.
After switching the NCU on, the fan is activated for a brief period of time (function test)
before turning itself off again.
Note
The NCU can be operated only with an operational dual fan module.
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Equipment Manual, 10/2023, A5E45627807B AH
NCU 1750
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