TroubleshootingSamsung Electronics 73Error Mode E121,E122,E123, E901, E902, E903, E904, E906, E916Symptom In case of open or short circuit of indoor temperature sensorFailure Short or leakage of the corresponding sensorYesNoNoIn this case, is the resistancevalue out of range in the temperaturetable on the right?YesIs temperaturesensor disconnected from theconnector in PCB?Restart the system after replacing the PCBRestart the system after connectingto the PCB connectorTemperature sensor failure(replace)Remove the temperature sensorconnector from the PCB and measure theresistance between two terminals4-4-5 Hydro unit temperature sensor(open/short)Currenttemperature(°C)Resistance(kΩ)60 59.1655 69.4450 81.9245 96.9540 115.435 137.830 165.725 20020 242.515 295.410 362.4<204 Type>Currenttemperature(°C)Resistance(kΩ)60 3.0355 3.5950 4.1745 4.9340 5.8435 6.9530 8.3225 1020 12.0815 14.6810 17.94<103 Type>Error Mode Sensor TypeE121,E122,E123,E901,E902,E903,E906,E916103E904 204
