EWC Controls Forum

Hi, I was wondering if you could shed some light on this... I have an EWC-ST-2E control unit. 2 MA-ND3 dampers are wired to zone 1 and one MA-ND3 damper is wired to zone 2. When either zone calls for cooling, the light on the damper changes to green, but the motor does not move the dampers. So from ...