Fault Diagnosis Of Major Parts (Pcb) - Samsung ASH-0906ER Service Manual

5-4 Fault Diagnosis of Major Parts
Parts
Temp.Sensor
Heat ex. Sensor
Outdoor Sensor
Indoor Fan Motor
Outdoor Fan Motor
Stepping Motor
(UP/DOWN swing motor)
Samsung Electronics
Measure resistance with a tester.
Normal 8㏀~27㏀ at ambient temperature (+0℃~ +30℃)
∞, ОΪ...open or short
Abnormal
Measure resistance between terminals (CN73) with a tester
Normal
Abnormal
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℃ ~ 30℃)
Abnormal ∞, ОΪ...open or short
Measure resistance between red wire and each terminal.
Normal Approx. 380Ϊ at ambient temperature (20℃~30℃)
Abnormal ∞, ОΪ...open or short
Diagnosis
At ambient temperature (10℃ ~ 30℃)
between Resistance
Red, Yellow 175±10Ϊ
Red, Blue 315±15Ϊ
between
Gray, Orange
0.5V ~4.5V
Yellow, Orange
between resistance
Black, White 160±10Ϊ
Black, Red 151±10Ϊ
voltage
5V
5-9