Si06-305 TroubleshootingService Diagnosis 874.12 Discharge Pipe Temperature ControlRemoteControllerDisplayF3Method ofMalfunctionDetectionThe discharge pipe temperature control (stop, frequency drooping, etc.) is checked with thetemperature being detected by the discharge pipe thermistor.MalfunctionDecisionConditions If a stop takes place 6 times successively due to abnormal discharge pipe temperature, thesystem will be shut down. If the temperature being detected by the discharge pipe thermistor rises above °C, thecompressor will stop. (The error is cleared when the temperature has dropped below°C.)Stop temperatures The error counter will reset itself if this or any other error does not occur during the following60-minute compressor running time (total time).SupposedCauses Refrigerant shortage Four way valve malfunctioning Discharge pipe thermistor defective(heat exchanger or outdoor air temperature thermistor defective) Outdoor unit PCB defective Water mixed in the local piping Electronic expansion valve defective Stop valve defectiveTroubleshootingCheck No.4Refer to P.105Check No.6Refer to P.107Check No.11Refer to P.110(1) above 45Hz (rising), above 40Hz (dropping) 120 80(2) 130~45Hz (rising), 25~40Hz (dropping) 110 70(3) below 30Hz (rising), below 25Hz (dropping) 105 65Replace a defectivethermistor.Replace the valve itself orthe coil.Refer to the refrigerant linecheck procedure.Replace the outdoor unitPCB. (R2846)CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.Check No. 6Check the thermistors. Malfunctioningl Discharge pipe thermistorl Outdoor unit heat exchanger thermistorl Outdoor temperature thermistorl Refrigerant shortagel Four way valve malfunctioningl Water mixedl Stop valve defectiveMalfunctioningFunctioningFunctioningFunctioningCheck No. 11Check the refrigerant line. MalfunctioningCheck No. 4Check the electronic expansionvalve.
