Samsung AQ18A1QE/B Service Manual

Samsung Electronics 5-95-4 Fault Diagnosis of Major PartsPartsTemp.SensorHeat ex. SensorIndoor Fan MotorOutdoor Fan MotorStepping Motor(UP/DOWN swing motor)DiagnosisMeasure resistance with a tester.Normal 8KΩ~27KΩ at ambient temperature (+0°C ~ +30°C)Abnormal ∞, O Ω … open or shortMeasure resistance between terminals (CN73) with a testerNormal At ambient temperature (10°C ~ 30°C)AbnormalMeasure the voltage between ground and signal wire of the fan motorNormalAbnormal Abnormal if voltage does not change from 0V to 5V.Normal At ambient temperature (10°C ~ 30°C)Abnormal ∞, O Ω … open or shortMeasure resistance between red wire and each terminal.Normal Approx. 380Ω at ambient temperature (20°C ~30°C)Abnormal ∞, O Ω … open or shortbetween ResistanceRed, Yellow 190±10ΩRed, Blue 170±10Ωbetween VoltageGray, Orange 0.5V~4.5VYellow, Orange 5Vbetween ResistanceBlack, White 350±10ΩBlack, Red 270±10Ω