Blue Star 1 Ton VRF Split AC Indoor PCB Board suitable for Hi-Wall indoor units. PCB model VHW-10MQF00785, firmware SYRIDVI12F1M-3101700105, version 12F Hi-wall 1 V3.0, model IHW12F2, manufactured 06-09-2017. Designed for reliable indoor unit control, communication, fan operation, sensors, and system protection.