EWC-ST-2D cooling

[jsvicini]

I have an EWC-ST-2D with 2 manual dampers installed in my house
With SW1 switch set to Open and SW2 switch set to Closed it runs good in the winter when the thermostat is set to heat.
However in the with thermostat set to cool it doesn't work.
The damper on SW2 works the same (closed when no demand) which is OK
The damper on SW1 does not work the same (with thermostat in heat the damper stays open when there in no demand, but with the thermostat in cool the damper closes with no demand).
To run the system I pulled the power wire off the damper on SW1 to keep it open all the time. Which means I am always cooling that zone.
Any idea on what could be wrong.

R1, O, B & G leads are conected to the main thermostat.

[Paul Z.]

Call the office 1-800-446-3110 x490. I will go over the board with you.