Samsung SH09YAB - Fault Diagnosis of Major Parts

Samsung Electronics 5-9
5-4 Fault Diagnosis of Major Parts
Parts
Temp.Sensor
Heat ex. Sensor
Indoor Fan Motor
Outdoor Fan Motor
Stepping Motor
(UP/DOWN swing motor)
Diagnosis
Measure resistance with a tester.
Normal 8
K Ω ~27K Ω at ambient temperature (+0°C ~ +30°C)
Abnormal ∞ , O Ω … open or short
Measure resistance between terminals (CN72) with a tester
Normal At ambient temperature (10°C ~ 30°C)
Abnormal ∞ , O Ω … open or short
Measure the voltage between ground and signal wire of the fan motor
Normal
Abnormal Abnormal if voltage does not change from 0V to 5V.
Normal At ambient temperature (10°C ~ 30°C)
Abnormal ∞ , O Ω … open or short
Measure resistance between red wire and each terminal.
Normal Approx. 380 Ω at ambient temperature (20°C ~30°C)
Abnormal ∞ , O Ω … open or short
between Resistance
Red, Yellow 190
±
10 Ω
Red, Blue 170
±
10 Ω
between Voltage
Gray, Orange 05V~4.5V
Yellow, Orange 5V
between Resistance
Black, White 350
±
10 Ω
Black, Red 270
±
10 Ω