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Service Manual
, 2016-12
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46
10.2
Door trip test circuit(None)
10.3
Temperature test circuit
It’s conducted by the sensor, making use of the characteristics that resistance value reduces as the
temperature increases, and the thermistor that has temperature coefficient of resistance in medium
temperature.
The characteristic that resistance value reduces as the temperature increases is deemed to have
negative slope or negative temperature coefficient (NTC), and such thermistor is called as NTC
thermistor. The resistance value changes sensitively with temperature and typically changes 7% ~
3% per degree centigrade. Sensor used in the refrigerator is NTC thermistor.
There is following computing formula for the sensor:
Sampling voltage / reference voltage = R1 / (RNTC + R1)
AD value / reference AD value = R1 / (RNTC + R1)
The reference voltage is 5V, RNTC is the resistance value of the sensor, R1 is R31\R32\R33 in
schematic diagram that is 5.1K
Содержание 22031020000054
Страница 5: ...Service Manual 2016 12 5 46 1 Safety Warning Code 1 1Warning for operation safety ...
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Страница 8: ...Service Manual 2016 12 8 46 1 2Safety instruction for refrigerant ...
Страница 18: ...Service Manual 2016 12 18 46 Down view Open Door Maximum open angle of door 135 ...
Страница 36: ...Service Manual 2016 12 36 46 11 Troubleshooting Method 11 1 No refrigeration ...
Страница 37: ...Service Manual 2016 12 37 46 ...
Страница 38: ...Service Manual 2016 12 38 46 11 2 Compressor failure ...
Страница 39: ...Service Manual 2016 12 39 46 11 3 Defrosting is not working ...
Страница 40: ...Service Manual 2016 12 40 46 11 4 Fan in the freezing chamber is abnormal Refer to this method for other fans ...
Страница 41: ...Service Manual 2016 12 41 46 11 5 Damper is abnormal None 11 6 Lights inside the refrigerator don t light up ...