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MITSUBISHI ELECTRIC Mitsubishi Home Refrigerator MR-G50J-SS-NZ User Manual

Page 30

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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