... 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 ... power line communication is applied between indoor and outdoor controller h. It can run cool,heat,fan,dehumidify, ... ,overload,over voltage,over pressure protection etc. Controller for floor-stand type A.C.