Refrigerator Service manual  NO FROST MODEL: RD-44WC*（BCD-322WYA）

Circuit diagrams and parameters

  

Cooling diagram

  

Fault display code

1.If there is a temperature sensor fault, fan fault or defrosting timeout fault, each time you open the refrigerator

door, the corresponding LED light flashing 30 seconds on the display board.

2.When freezer temperature sensor occur failure: refrigeration temperature display area D1 Light flash 30

seconds.

3. When the freezer temperature sensor occur failure: frozen temperature display area F1 lights flash 30 seconds.

4. When the defrosting sensor occur failure: frozen temperature display area F2 indicator light flash 30 seconds.

5. When the refrigerant evaporating fan occur failure: frozen temperature display area F3 indicator light flash 30

seconds.

6. When the defrosting heater heating time arrive to the limit time, frozen temperature display area F4 indicator

light flash 30 seconds.

7. when the refrigerator door open time more than 2 minutes and less than 12 minutes, refrigerator door

temperature display area D5 indicator lights indicating until the refrigerator door closed.

8. when frozen door open time more than 2 minutes and less than 12 minutes, the freezing temperature display

area F5 indicator lights indicating until frozen door closed.

9. When communication occur failure refrigeration temperature display area D2 indicator lights indicating until the

communications back to normal.

When the fault is eliminated, it turns to normal display.

Using a multimeter with the ohm switch to measure the resistor of sensor, normally at surrounding 25℃ the

resistor should be about 2kohm and every with the temperature decreases 1℃ the corresponding resistor value

would increase about 45ohm. If the measured value is not within the normal scope, the sensor is bad and needs

to repair or change.

Compulsory defrost

within 10 minutes after connecting power, please Press the button "Fridge" and "Freezer" at the same time, when

the refrigerator door opens and the freezer door closes, for 10 seconds . In addition, with a long sound of buzzer,

it enters into the process of mandatory defrosting.

--After entering into the process of mandatory defrosting, it controls the operation according to the normal

operation of the automatic defrosting process.

--In the process of mandatory defrosting, the cold storage and the frozen temperature display area LED lamp

repeatedly lights up from left to right.

The setting of control panel

Compressor Protector test

 Use a multi-meter to test the resistance between the two end as the pic show : If there show 000 or almost 0 then it is OK. If there is no response then it is broken.

Compressor PTC starter test 

 Use a multi-meter to test the resistance between the two end as the pic show : If there show the number is between About 9-25Ω then it is OK. If there show 000 or no response then it is broken.

Checking the defrost fuse Fuse

 is a high temperature protector of defrost system, when defrosting, if it feel the temperature is more than 73℃, it will cut off the defrost heater, stopping defrost, so that it can protect the parts. The common problems are evaporator defrost incomplete: Checking method as following:

As picture 1，it is the defrost fuse.

 As picture 2 , using the multimeter measure two foots of fuse, if the value of resistance is 0000, it means normal. 

Checking the Heater If defrost system failure，checking the heater and the temperature fuse as well as wires. Measuring temperature fuse and heater resistance about 324Ω then it is OK.( Brown and Blue)

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