Original Daikin VRV cassette indoor unit main control PCB circuit board, Part No. 03-001984 and PCB No. EC19016-3[B]. Designed for compatible Daikin VRV cassette indoor units to control fan motor, communication, sensors, electronic expansion valve, and indoor unit operation. Suitable for replacement of faulty indoor control boards by qualified HVAC technicians. Daikin VRV systems support a wide range of cassette indoor units for commercial air conditioning applications.