... outdoor fan speed,electric heater,compressor,valve, sweep etc. a. Low cost b. Apply 8 bit microcomputer of ... control d. The precision of temperature control <=1°C e. The display is the LEDs or the double ... ,compressor,valve, sweep etc. g. The power line communication is applied between indoor and outdoor controller h. It ... ,over voltage,over pressure protection etc. Controller for floor-stand type A.C.