- 2 zones (one for each floor)
Central air and heat
MA-ND4 for the zone in question, second floor
EWC BM2000 control panel
The house is new to us
When the air-conditioning is turned 'on' on the second floor, the MA-ND4 closes (red light).
When the air-conditioning is turned 'off' on the second floor, it opens (green light).
The motor does work. I can watch it change position and change status (the light) when prompted.
What I have done:
I removed the entire damper from the vent with the motor attached and showing green. The damper is open. So green does equal open.
I looked at the wiring to determine which set was connecting the control panel to the motor.
Motor set up -
1 = red
4 = white
6= blue
Control set up -
1 = red
2 = white
6= blue
I changed the control set up to match the motor (4 = white).
This did not fix it.
The question:
What needs to change to have the zone 2 open when the air is on, and closed when the air is off?
Zone 1 is working properly.