It can control indoor&outdoor fan speed,electric heater,compressor,valve, sweep etc. a. Low cost b. Apply 8 bit microcomputer ... f. It can control indoor&outdoor fan speed,electric heater,compressor,valve, sweep etc. g. The power line communication is applied ... sleep,memory,clock,network function etc. j. It has 3minutes compressor,sensor fault, anti-cool-fan,defrosting,overload,over voltage,over ...