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