Fault Diagnosis Of Major Parts - Samsung WALL MOUNTED TYPE Technical Manual

(Unit defect)
♦If the comp is locked.
-> Replace the comp.
♦If the comp is operating without the revolution of fan motor
-> Take out the protection cover.
-> Check the fan motor connector and replace the fan motor.
4

Fault Diagnosis of Major Parts

Parts
♦
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
(UP/DOWN swing motor)
133
Troubleshooting
Measure resistance with a tester.
Normal
Ambient temperature
Resistance of
thermistor[
∞, O Ω ... open or short
Abnormal
Normal
Ambient temperature
Resistance of
thermistor[
∞, O Ω ... open or short
Abnormal
Measure resistance between terminals (CN72) with a tester
Normal At ambient temperature (10°C ~ 30°C)
between
Red, Blue
Red, Yellow
Abnormal
Measure the voltage between ground and signal wire of the fan motor
Normal
between
Gray, Orange
Yellow, Orange
Abnormal Abnormal if voltage does not change from 0V to 5V.
Normal At ambient temperature (10°C ~ 30°C)
between
Black, Red
Black, White
∞, O Ω ... open or short
Abnormal
Measure resistance between red wire and each terminal.
Normal Approx. 380Ω at ambient temperature (20°C ~30°C)
∞, O Ω ... open or short
Abnormal
Diagnosis
15°C 20°C
14.68 12.09
Ω]
K
0°C 10°C
553 362
Ω]
K
Voltage
410±10%
325±10%
Voltage
05V~4.5V
5V
Resistance
275±10%
350±10%
25°C 30°C 35°C 40°C
10 8.31 6.94 5.83
20°C 30°C 40°C 50°C
242 166 165 82
Main
Sub
Main
Sub