High/Low pressure protection for compressor and overheating protection inside the machine Low water level alarm device and low temperature deicing alarm Imported compressor from Europe,US and Japan  Refrigeration system welding mouth using anaerobic welding method, reduce oxide, smooth surface Throttle components are Danish danfoss, the United States cycle Tank use SUS304 stainless steel, avoid corrosion leakage Stainless steel plate, coil type, shell and tube type, finned high efficiency heat exchanger RS485 communication function, realize automation management Electrical appliances using OMRON. FUJI. TE. LGMOELLER. SCHNEIDER Control mode: imported microcomputer and PLC control Safety protection perfect, fault display, maintenance, maintenance without professional High efficiency of the evaporator and condenser, can save energy more than 30% 2 compressor heads for over AC-08, for individual or joint operation