Samsung RS2666 If fan doesn’t work Reference, Connections of door S/W, Door open DC, Door close

Page 53

Diagnostics

11-7) If fan doesn’t work:

Reference

The refrigerator has been applied with the BLDC fan motor. For RS2533, R room Fan is AC motor used. The BLDC motor is driven by DC 8-12V.

Under the normal condition of COMP ON, it is operated together with F-FAN motor. With operation of the CoolSelect ZoneTM function, the F-Fan motor may do not work. If the door is opened and closed once at a high ambient temperature, the BLDC motor would be operated after a 1-minute or longer delay. Therefore, you’ re advised not to take it for an error.

When the refrigerator is open, the freezer fan motor will also stop working simultaneously with the fan motor. (for the purpose of performance improvement).

Start

YES

COMP OFF?

For C-FAN

Is the voltage between GND

of the main-PCB and pin No. 4 of CN72

around DC 8-10V?

NO

For R-FAN

Is the voltage DC10V between

GND of the main-PCB and pin No. 4

of CN72 ?

NO

Is the voltage DC 0V between

CN30 No. 5 and No. 6 in the main-PCB

section?

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Execute Forced

For F-Fan

NO

 

 

 

 

 

 

 

 

 

 

operation. (See page

 

 

 

 

 

Is the voltage DC 9-11V between

YES

 

34 in the manual)

 

 

 

 

 

 

 

 

 

 

 

GND of the main-PCB section and

 

 

 

 

 

 

 

 

 

 

CN72 pin No. 6?

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

Fan works normally.

 

 

 

 

 

 

 

Is the voltage DC 0V between

NO

 

 

 

 

 

 

 

CN30 No. 1 and No. 2

 

 

 

 

 

 

 

 

 

 

 

 

in the main-PCB?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

Troubleshoot the

connections of door S/W.

For C-FAN

DoesDC8-10Valternate

withbelowDC2VbetweenGNDofthemain-PCB

sectionandCN72pinNo.4?

YES

Reference

 

 

 

 

 

 

Apply power around 5 minutes

 

 

 

 

Measure with the door closed.

 

 

 

 

In the first power application, the

 

- door open: DC 5V

 

 

after the power OFF. (Prevent

 

 

freezer / fridge / compressor fans

 

- door close : 0V

 

 

overload of compressor.)

 

 

work for 5 minutes regardless of the

 

 

 

 

 

 

 

 

 

 

 

condition.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For R-RAN

 

 

For F-FAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DoesDC10Valternate

Does DC 9-11V alternate

NO

 

 

 

withbelowDC2VbetweenGNDofthemain-PCBsectionand

with below DC 2V between GND of the main-PCB section

 

CN72pinNo.5?

and CN72 pin No. 6?

 

 

YES

YES

 

Exchange or troubleshoot the

 

 

 

main PCB.

CN72 No. 3(F), 2(R),1(C) will be generated pulse signals when the motor rotates. These signals will be inputted into MICOM. Unless signals are not inputted in the restart of motor, it will be ON 10 seconds after the fan OFF. But if signals are not still entered, the above operation will restart four times more. Without signals entered continuously, the motor will get restarted after 10 minutes. This function is effective where the normal operation of motor would be restrained due to foreign matters such as ice.

Expected causes :

1.Check if the fan motor has failure itself.

2.Check if the wire connections have a trouble of contact.

3.Check the input of the fan motor rotation pulse in the operation motor fan. (See the details of Fan Motor Drive Circuit section.)

53

Page 52 Page 54
Image 53
Page 52 Page 54
Contents Model RS2544 RS2622 RS2644 RS2666 RS2777 Important Safety Notice Contents Multi-Flow System Door AlarmXtra SpaceTM Xtra FreshTMTo protect refrigerator in movement Cover using a screwdriver, and then disconnectWith the door closed, remove the upper hinge It does not fall on youModels NomenclatureCompany Name Product R Refrigerator Label LocationFreezer Refrigerator SpecificationsWarranty information Shelves and Bins Interior Views and DimensionsFreezer RefrigeratorDimensions of Refrigerator Inches Refrigerant Route in Refrigeration cycle Refrigeration Cycle and Cool Air Circulation RouteFreezer Evaporator Dryer Capillary TubeCool Air Circulation Freezer Refrigerator Refrigerator Disassembly Mechanical DisassemblyFreezer Disassembly PlasticWire Drawer in Freezer······························Door Handle Control PanelBeverage StationTM Door GasketRefrigerator Light Refrigerator Door Light SwitchTempered Glass Shelf Plastic Drawers in RefrigeratorUpper Ductwork Water FilterEvaporator Cover in the Refrigerator Evaporator Fan MotorRefrigerator Thermistor Evaporator in RefrigeratorCoolSelect ZoneTM Thermistor CoolSelect ZoneTM ThermistorPlastic Wire Drawer in Freezer Freezer Door Light SwitchDoor Bin in Freezer Freezer ShelfDisconnect the ice maker wire connector Ice maker is located inside of the ice dispenser assemblyAuger Motor Case Unlock the locking tabs to separate the ice maker kitEvaporator Cover in Freezer Freezer LightFreezer Thermistor Evaporator in FreezerAmbient Thermistor Ice-MakerThermistorWater Solenoids Machine Compartment ＆ Electric BoxCondenser Fan Sub-condenserOperation Function Digital Panel Temperature Control FunctionChild Lock Function Quick Ice and Power Cool FunctionsPower FreezeQuick Ice function CoolSelect ZoneTM Function RS2666,RS2777 Fan Motor Delay Function of the Machine CompartmentIce & Water Dispenser Function Ice-Maker Function Water Filter Indicator FunctionFilter Indicator Initial Operation function Preparation of Ice-makerJudgement Remark ·MICOM PortDefrost Function Water Supply functionHeater on Heater OFFDefrost operation Self-Diagnostics Function Beeps will cease immediately when the doors are closedSelf-Diagnostics in the initial Power on Sound FunctionError items of self-diagnostics ErrorFunction error Error items LED Display Details RemarksThis mode, only the display LEDs for temperature will be on Restoration Function for Power OutageLoad Operation Check Function Set Point Shift FunctionTable of Set Point Shift Function Shift the freezer temperature sensorOperation Function Shift the Ice maker temperature sensor Shift the CoolSelect ZoneTM temperature sensorCircuit Descriptions Reset Circuit Source Power CircuitOscillator Circuit TerminalDoor S/W Sensing Circuit Temperature Sensing CircuitMicom ChangeKey Scan and display operation DEF-sensor and Bimetal work in parallelKey Scan and Display Circuit Key Scan CoolSelect ZoneTM Panel Circuit Voltages between high-speed and low-speed Fan Motor Bldc Drive CircuitMotor drive circuit Option Circuit Eeprom CircuitLoad Drive Circuit D602COMP. equivalence circuit of drive section If power is not on DiagnosticsStart NormalIf the compressor and cooling fan motor don’t work normally AssemblyCheck after a lapse of 5 min ConnectionPerform forced defrosting for F Room at a time If defrost functionExchange and troubleshoot Corresponding sensor If there is a trouble with self-diagnosis If the temperature sensor of F and R room has troubleIf the ambient sensor has trouble Start Check if the iced solder of main PCB is ShortIf Ding-Dong sounds continuously Start If alarm soundIf Beep sounds continuously Start Remove causes afterDisplay’ Without sound of buzzer operation StartMain PCB is normal buzzer normal ZoneTM panel If the panel PCB is not working normallyConnections of door S/W If fan doesn’t work ReferenceDoor open DC Door closeIf the lamp of CoolSelect ZoneTM is not lit Start If CoolSelect ZoneTM isn’t operated normally RS2555, RS2577If the Panel PCB key isn’t selected Panel PCB has trouble for itselfIs the inside lamp filament cut? If the lamps of freezer / refrigerator does not lightCheck the operation of SSR71 and Q701 If Crushed Ice/Cubed Ice doesn’t work properly Safety Instructions on Service DC 0V Stop Condition Appendix ⅠReference for circuit diagnosticsResistance value ∼DC 12V load working conditionValue Contents For safety, you must turn the power off LoadRef Check a load Ref. Def heaterLamp Lamp on the REF Ref Check Door S/W834 878791 749Part Name Specifcation ’TY Ref Service part lists of each circuit boardPage Page Refrigerator Division 2003 Code DA82-00001D Electronics
Top Page Image Contents