Samsung SH12BWHAX - Fault Diagnosis of Major Parts

Samsung Electronics28
6-4 Fault Diagnosis of Major Parts
• Indoor "Temp.Sensor"
• Indoor "Heat ex. Sensor"
• Outdoor "Temp.Sensor"
• Outdoor "Deice Temp. Sensor"
• Outdoor "Discharge
Temp.Sensor"
• Outdoor "OLP Temp.Sensor"
Indoor Fan Motor
Outdoor Fan Motor
Stepping Motor
Measure resistance with a tester.
Normal
Abnormal ∞, 0Ω … open or short
Normal
Abnormal ∞, 0Ω … open or short
Measure the resistance between terminals of the connector(CN72) with a tester.
Normal At the normal temperature (10°C ~ 30°C)
Abnormal ∞, … open or short
Measure the voltage between motor wires with a tester.
Normal At the normal temperature (10˚C ~ 30˚C)
✳ SH09BWHX only (AC Motor)
Abnormal ∞, … open or short
Measure the resistance between the red wire and each terminal wire with a tester.
Normal About 300Ω at the normal temperature (20˚C ~ 30˚C)
Abnormal ∞, … open or short
DiagnosisPart
Ambient temperature 15°C20°C25°C30°C35°C40°C
Resistance of
14.68 12.09 10 8.31 6.94 5.83
thermistor[KΩ]
Ambient temperature 0°C10°C20°C30°C40°C50°C
Resistance of
553 362 242 166 165 82
thermistor[KΩ]
Compare terminal Resistance(Ω) Remark
Yellow, Blue 460Ω±10 Main
Yellow, Red 314Ω±10% Sub
Compare terminal Resistance(Ω) Remark
Black, Red 255Ω±10% Main
Black, Yellow 415Ω±10% Sub
DB98_19047A(1)_1 4/21/04 2:27 PM Page 28