The Daikin-McQuay 4009630 Printed Circuit Board is an electronic control component designed for compatible Daikin-McQuay HVAC equipment. It functions as a central control interface, receiving signals from sensors and system controls, processing operating information, and coordinating equipment functions accordingly. This PCB is used in Daikin-McQuay commercial HVAC systems to support ... https://www.partshnc.com/4009630-daikin-mcquay-printed-circuit-brd