It can control indoor&outdoor fan speed,electric heater,compressor,valve, sweep etc. a. Low cost b. Apply 8 bit microcomputer of NEC or Toshiba to main board c. Apply 4 bit microcomputer & LCD to remote control d. The precision of temperature control <=1°C e. The display is the LEDs or the double 7segments LEDs or LCD(backlight) or VFD f.  It can control indoor&outdoor fan speed,electric heater,compressor,valve, sweep etc. g. The power line communication is applied between indoor and outdoor controller h. It can run cool,heat,fan,dehumidify,save,forcing mode i. It has timer,sleep,memory,clock,network function etc. j. It has 3minutes compressor,sensor fault, anti-cool-fan,defrosting,overload,over voltage,over pressure protection etc.

Controller for floor-stand type A.C.