For mechanical major problems exist, we will assign professional technicians, again based on road condition at full speed at the customer location for customers to solve mechanical problems.

This paper gives a particular introduction about comparing circuit, and presents the reasons why the open-loop comparing circuit could not operate stably in a condition full of high-speed noise.

In this way, regardless of the demand of production size, the fan will run at full speed, cannot adjust accordingly along with the change of operation condition, a large amount of energy wasted.