... main board, wall-mount controller and remote control. It can control the fan, valve, pump and sweep. PCBA ... It makes up of main board, wall-mount controller and remote control.2). There are wall-mount, ... floor-stand, ceiling-mount type indoor unit controller.3). Apply 8 bit and 4 bit microcomputer ... between main board and wall-mount controller.5). It can control the fan, valve, pump and sweep.6). ...