The Daikin-McQuay 4026840 Printed Circuit Board Assembly is an electronic control component designed for compatible Daikin-McQuay HVAC equipment, including commercial air conditioning and cooling systems. It processes electrical signals from connected sensors and control devices to coordinate equipment functions and regulate system operation. This board supports communication between ... https://www.partshnc.com/4026840-daikin-mcquay-printed-circuit-board-assembly