help with Zalman VF1000

Good evening,
I installed a Zalmann VF1000LE on my Asus EAH4850.
Is it normal for the small fan to blow (every 2-3 seconds)?
Thank you for your answers

You have the right to a noise or it stops and then restarts?
In any case this is not normal, well check the connection of the pins fan among others, after it may be that the fan is HS: /

There was no noise not. In fact on a fairly fast and steady, and it stops and restarts it when you reboot that e noise is slightly heard.

It is not normal?