Haier H2SM-(9+12)HEK03/R2 Service Manual

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Haier H2SM-(9+12)HEK03/R2 Service Manual Manual pdf 21 page image

H2SM-(9+12)HEK03/R2 Funcitions and ControlDomestic Air Conditioner195.3 Function of Main ThermistorNote: A:Outdoor suction temperature sensorB: Exhaust temperature sensorC: Indoor heat-exchange sensor2XWGRRUSuctionTemperatureSensorThe 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.ExhaustTemperatureSensorThe 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.Indoor heat-H[FKDQJHSensor1.The indoor heat exchanger thermistor is used for controlling target dischargetemperature.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 coolingoperation, if the temperature drops abnormally, the operating frequency becomes lower,then the operation halts.3.The indoor heat exchanger thermistor is used for anti-icing control.During the coolingoperation, if the heat exchanger temperature in the room where operation is haltedbecomes -1°C, it is assumed as icing.