Function of Thermistor SiBE05-513A30 Function and Control2.2 Cooling Only ModelA Outdoor HeatExchangerThermistor (DCB)1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature.The system sets a target discharge temperature according to the outdoor and indoor heatexchanger temperature, and controls the electronic expansion valve opening so that thetarget discharge temperature can be obtained.2. The outdoor heat exchanger thermistor is used for detecting disconnection of the dischargethermistor when cooling.When the discharge pipe temperature becomes lower than the outdoor heat exchangertemperature, the discharge pipe thermistor is judged as disconnected.3. The outdoor heat exchanger thermistor is used for high pressure protection during coolingoperation.B DischargePipe Thermistor(DOT)1. The discharge pipe thermistor is used for controlling temperature of the discharge pipe.If the temperature of discharge pipe (used in place of the inner temperature of thecompressor) rises abnormally, the operating frequency drops or the operation halts.2. The discharge pipe thermistor is used for detecting disconnection of the dischargethermistor.C Indoor HeatExchangerThermistor (DCN)1. The indoor heat exchanger thermistor is used for controlling target discharge temperature.The system sets a target discharge temperature according to the outdoor and indoor heatexchanger temperature, and controls the electronic expansion valve opening so that thetarget discharge temperature can be obtained.2. The indoor heat exchanger thermistor is used for preventing freezing.During the cooling operation, if the temperature drops abnormally, the operating frequencybecomes lower, then the operation halts.3. The indoor heat exchanger thermistor is used for anti-icing control.During the cooling operation, if the heat exchanger temperature in the room where operationis halted becomes -1°C, it is assumed as icing.ACB Compressor (R2828)
