Samsung MC26AC2X Service Manual download pdf (Page 42)

5-17Samsung Electronics

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 8KΩ~27KΩ at ambient temperature (+0°C ~ +30°C)

Abnormal ∞, OΩ … open or short

Measure resistance between terminals (CN72) with a tester

Normal At ambient temperature (10°C ~ 30°C)

Abnormal ∞, OΩ … 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 ∞, OΩ … open or short

Measure resistance between red wire and each terminal.

Normal Approx. 380Ω at ambient temperature (20°C ~30°C)

Abnormal ∞, OΩ … open or short

between Resistance

Red, Yellow 190±10Ω

Red, Blue 170

10Ω

between Voltage

Gray, Orange 0.5V~4.5V

Yellow, Orange 5V

between Resistance

Red, Blue 100±10Ω

Red, White 130±10Ω

DB98_11868A(1)_1 3/3/03 11:17 AM Page 5-7

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Samsung MC26AC2X Service Manual Page 42