Evaporative Cooling Control

Hi Guys,
I am new to this forum but am after some help.

I run a HVPRO in my house and over time have everything pretty much integrated in to this system with the exception of my evaporative cooling. I just can't figure out how it works.

My unit in my house is a Brivis Evaporative Cooling system. Between the control unit and the device is a 5 pin ribbon cable.

Their is no boolean operations between pins and it looks like resistance changes.

I have tried contacting Brivis and they have been no help.

Any help is appreciated.

Shane