1.     Overview

The controlling board can automatically control the running speed of DC12V PWM fan based on detected indoor temperature, so as to achieve the objective of energy saving and emission reduction. 

2.     Technical parameters

1)        Working voltage: DC 8V ~ 13.8V

2)        Operating temperature: -25℃ ~ 70 ℃

3)        Ambient humidity: 0 ~ 90 %RH

4)        Temperature detecting range: -40℃ ~ 70 ℃

5)        Detecting accuracy: ±1℃

6)        PCB board size: 5x7cm

7)        3 channels of fan fault detecting

8)        Connecting with computer via USB to set parameters

Parameters are as the following:

Parameters explanation:

Fan off temp.: When indoor temp. < set value, PWM signal is off.

Fan low-speed running temp.: When indoor temp. > set value, fans run at low speed, if temp. continues to rise, fans speed up till to full speed.

Fan full-speed running temp.: When indoor temp. > set value, fans run at full speed.

Fan failure frequency: When the feedback frequency < set value, fan failure alarms.

1)        Fan control

Control the work of 3 groups variable-speed fans.

2)        Running indicator

When power on, running indicator(green) is on

When connected with PC, USB(green) indicator is on.

3)        Alarm indicator

a)        When temperature sensor is short-circuit or open-circuit, running indicator(green) twinkles.

b)        When fan running frequency is underfrequency, alarm indicator (red) twinkles.