Samsung AQV12ACME - Page 26

5-4 Fault Diagnosis of Major Parts
@ Indoor “Temp.Sensor”
@ Indoor “Heat ex. Sensor”
@ Qutdoor “Temp.Sensor”
@ Outdoor “Deice Temp. Sensor”
@ Outdoor “Discharge
Temp.Sensor”
@ Outdoor “OLP Temp.Sensor”
Indoor Fan Motor
Diagnosis
Measure resistance with a tester.
Normal
Resistance of
Abnormal co, QQ... open or short
Ambient temperature 1o°c | 20°C
Resistance of
thermistor ke
co, QQ... open or short
Normal
30°C | 40°C | 50°C
Abnormal
Measure resistance between terminals (CN72) with a tester
Normal At ambient temperature (10°C ~ 30°C)
Voltage
Red, Blue 410+10%
Red, Yellow 325+10%
0,0Q... open or short
Abnormal
Measure the voltage between ground and signal wire of the fan motor
Gray, Orange 0.5V~4.5V
Yellow, Orange
Normal
Abnormal Abnormal if voltage does not change from OV to 5V.
Outdoor Fan Motor
Stepping Motor
{UP/DOWN swing motor}
At ambient temperature (10°C ~ 30°C}
Normal |
eine |
Black, Red 275410% Main
Black, White 350+10% Sub
co, OQ... open or short
Measure resistance between red wire and each terminal.
Normal Approx. 380Q at ambient temperature (20°C ~30°C}
Abnormal ce, QQ... open or short
Samsung Electronics
5-9