Sign detection device, sign detection method, sign detection program, and sign detection system

摘要

PROBLEM TO BE SOLVED: To detect the occurrence of a defect occurring in an air conditioner at an early stage and to identify the type of the defect. SOLUTION: The main power supply voltage, main power supply current, the pressure of the refrigerant on the high pressure side of the refrigeration cycle, the pressure of the refrigerant on the low pressure side of the refrigeration cycle, and the pressure of the refrigerant on the low pressure side of the refrigeration cycle are sucked into the compressor for each type of malfunction of the air conditioning equipment. The suction temperature of the refrigerant, the discharge temperature of the refrigerant discharged from the expansion valve, the temperature of the refrigerant liquid condensed into the liquid by the condenser, the suction temperature of the air sucked into the evaporator, and the blow temperature of the air blown from the evaporator. Pattern information indicating a change pattern is stored, and the type of defect that has occurred in the air conditioning equipment is identified based on the pattern information. [Selection diagram] Fig. 5