Fault Diagnosis Of Major Parts - Samsung SH09BWHA Service Manual

6-4 Fault Diagnosis of Major Parts

Part
• 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
28
Measure resistance with a tester.
Normal
Ambient temperature
Resistance of
thermistor[KΩ]
∞, 0Ω ... open or short
Abnormal
Normal
Ambient temperature
Resistance of
thermistor[KΩ]
∞, 0Ω ... open or short
Abnormal
Measure the resistance between terminals of the connector(CN72) with a tester.
Normal At the normal temperature (10°C ~ 30°C)
Compare terminal
Yellow, Blue
Yellow, Red
∞, ... open or short
Abnormal
Measure the voltage between motor wires with a tester.
Normal At the normal temperature (10˚C ~ 30˚C)
SH09BWHX only (AC Motor)
Compare terminal
Black, Red
Black, Yellow
∞, ... open or short
Abnormal
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)
∞, ... open or short
Abnormal
Diagnosis
15°C 20°C 25°C
14.68 12.09 10
0°C 10°C 20°C
553 362 242
Resistance(Ω) Remark
460Ω±10 Main
314Ω±10% Sub
Resistance(Ω) Remark
255Ω±10% Main
415Ω±10% Sub
30°C 35°C 40°C
8.31 6.94 5.83
30°C 40°C 50°C
166 165 82
Samsung Electronics