... control indoor&outdoor fan speed,electric heater, ... NEC or Toshiba to main board c. Apply 4 bit microcomputer & ... precision of temperature control <=1°C e. The display is the ... . It can control indoor&outdoor fan speed,electric heater,compressor,valve, sweep ... It can run cool,heat,fan,dehumidify,save,forcing mode i. ... compressor,sensor fault, anti-cool-fan,defrosting,overload,over voltage,over pressure ...