Samsung RS20NESW Dokumentacja Pobierz pdf (Strona 39)

11-4. Freezer fan abnormality(BLDC-FAN repair)

Measure in door closing

-. F-DOOR OPEN : DC5V

-. F-DOOR CLOSE : 0V

After impression of initial power

compressor and fans run continuously.

(It runs without regard to temperature)

If the pulse signal of fan self occurring through CN73 3

is not detected to MICOM, fan protection function runs

that performs 3 seconds ON 7 seconds OFF in five

times. It occurs DC7~12V at the time of 3 seconds

ON, it becomes below DC 2V at 7 seconds OFF.

1) Refrigerator controls the refrigerator temperature by damper motor without fan motor.

2) Because the apparatus room fan motor is applied to the same BLDC fan with F-fan, Check it by

reference to circuit diagram with the above method.

  

Reference

Is the compressor off?

Start

Forced start

Is it DC 7V~DC 12V between

main PCB part GND and CN73 1pin?

Impress the power after five minutes from the power

off(Compressor O/L/protection)

Check and repair the fan motor self inferior, contact

inferior of cord connection part

F-fan normal

Repair the door S/W connection part

Main PCB exchange/repair

Is it repeated DC 7V~DC 12V

and below 2V between main PCB part

GND and CN73 1 pin?

1) When the freezer fan is abnormal, freezer and refrigerator weak cooling occurs.

This is a freezer fan system failure. Refer to the followings.

Condition for decision

Is it DC 0V between main

PCB part CN30 1~2(freezer) and

5~6(refrigerator) pin?

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 57 58

Brak uwag

Samsung RS20NESW Dokumentacja Strona 39