Si04-306E TroubleshootingService Diagnosis 1254.12 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 120°C, thecompressor will stop. (The error is cleared when the temperature has dropped below107°C.)Stop temperatures (in case of 5.0kW class)(1) 110°C : above 45Hz (rising), above 40Hz (dropping)(2) 102°C : 30~45Hz (rising), 25~40Hz (dropping)(3) 98°C : below 30Hz (rising), below 25Hz (dropping) 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 temperature thermistor defective) Outdoor unit PCB defective Water mixed in the local piping Electronic expansion valve defective Stop valve defectiveTroubleshootingCheck No.04Refer to P.142Check No.06Refer to P.144Check No.11Refer to P.147(R7141)CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.Malfunctioningz Discharge pipe thermistorz Outdoor unit heat exchanger thermistorz Outdoor temperature thermistorz Refrigerant shortagez Four way valve malfunctioningz Water mixedz Stop valve defectiveFunctioningFunctioningFunctioningMalfunctioningMalfunctioningCheck No. 06Check the thermistors.Check No. 11Check the refrigerantline.Check No. 04Check the electronicexpansion valve.Replace the defectivethermistor.Replace the valve itself orthe coil.Refer to the refrigerant linecheck procedure.Replace the outdoor unitPCB.
