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Components/
Part Name
Check Method and Criterion
Parts Mounted
Position
Three-way
valve
In the machine
chamber at the
rear side of the
frame.
Normal Abnormal
54~56' (Gray
[common] A/ A/ B/
B each phase)
Open (∞' ) or
short circuit
(0' )
A 5
A 2
B
1
COM
3
B
4
1 2 3 4 5
B A
COM
B A
Check the operation by following either (1) or (2) below. When a popping sound is
heard 1 to 25 times, it is considered that the valve is operating normally. The sound
is clearly heard around the back of the product.
(1) Reset the power supply. Check the operation right after this.
(2) Ice making test. Check the operation right after the test is over.
Model NSCE001DC1
Check the operation of three-way valve
Thermistor
Defrost
thermistor
Evaporator
Ice making
thermistor,
Versa
compartment
thermistor,
Vegetable
compartment
thermistor
and Freezer
compartment
thermistor
In the fan grille
of each
compartments.
Ice making
tray
thermistor
In the ice
making
compartment.
Outside air
thermistor
In the operation
P.C. board.
Measure the resistance with a tester according to the following graph.
(Thermistor resistance values against temperature)
•Resistance measured under the ambient temperature from -50: to +50:
1. 200' to 500k' ·····················Normal
2. Out of the above range ·········Abnormal
Thermistor Check Procedure
•Thermistor resistance value will vary
with the change of temperature.
•Take the temperature around the
thermistor, and then measure thermistor
resistance using a tester.
The relation between resistance and
temperature is as shown on the left side.
0
0
5
10
15
20
25
30
35
(k')
10 20 30 (;)-10-20
Thermistor resistance
values against temperature
Outside air thermistor
(In the operation
P.C. board)
Resistance values
Temperature
Inner
thermistor
Refrigerator
compartment
Slide chilled
compartment
Ice making tray
thermistor
Freezer
compartment
Defrosting
Versa
compartment
Ice making
compartment
Vegetable
compartment
Troubleshooting with self-check
(1)If the self-check indicates the abnor-
mality of thermistor when the power is
turned on, measure the resistance of the
thermistor.
•If there is a short circuit in the thermis-
tor, there may be a defect in the contact
of the connector or the element of the
thermistor.
(2)When the self-check indicates the
abnormality of thermistor a few seconds
after the power is turned on, check the
contact of the connector.
OA090-1.qxp 06.7.20 9:55 AM Page 30