... 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 ... or VFD f. It can control indoor&outdoor fan speed,electric heater,compressor,valve, sweep etc. g ... , anti-cool-fan,defrosting,overload,over voltage,over pressure protection etc. Controller for floor-stand type A.C.