If there is a trouble with self-diagnosis | Samsung RS2666, RS2544

Diagnostics

11-4) If there is a trouble with self-diagnosis

-Error of sensor can be seen on the front display of refrigerator. If power is impressed to refrigerator first, an failure of sensor is found. The refrigerator will stop working and display(blink) the region of trouble-occurred sensor repetitively.

-Even if sensor has failure during the operation, the refrigerator will not stop working but can run the normal cooling operation because of being operated in the Emergency Operation mode. Therefore you’ re requested to use how to check self-diagnosis(at page 31) in the manual.

1) If the ambient sensor has trouble

Start

See Ref. 4 (descriptions of circuit operation, and how to check temperature sensor in the manual.)

Was the Main

–PCB connector(CN31) inserted correctly?

YES

Is the ambient temperature

sensor normal?

YES

Is the input of voltage to

MICOM pin No. 63 normal?

YES

No trouble with PCB and temperature sensor.

Recheck the contact failure of connector.

NO

NO

NO

A bad contact or connector missing?

Exchange the temperature sensor.

Check the iced solder and

short of main-PCB.

2) If the temperature sensor of F and R room has trouble

See Ref.4 (descriptions of circuit operation, and how to check temperature sensor in the manual.)

For sensor resistance per temperature, make use of the resistance values from Ref. 4 and 5.

Start

	Is the unit of		NO
	Fridge’s temperature
	sensor normal?
		YES
		YES
	Was the Main – PCB		NO
	connector(CN30) inserted
	correctly?
		YES
		YES
	Is the sequence of		NO
	insertion of connector(CN30) wire identical to
	the circuit diagram?
		YES
			NO
	Is the input voltage to		NO
	Is the input voltage to

MICOM pin No. 59 normal?

YES

No trouble with PCB and temperature sensor.

Recheck the connector for an error of contact.

Exchange the temperature sensor.

Troubleshoot a bad contact or missing of

connector.

Modify the wrong configuration of connector wire -in case of being not inserted or incorrectly inserted - to be coincided with the circuit diagram.

Check if the iced solder of main PCB is

short.

49

Image 49

Samsung RS2666, RS2544, RS2622, RS2777 If there is a trouble with self-diagnosis, If the ambient sensor has trouble Start

Contents

Model RS2544 RS2622 RS2644 RS2666 RS2777 Important Safety Notice Contents Multi-Flow System Door AlarmXtra SpaceTM Xtra FreshTM To protect refrigerator in movement Cover using a screwdriver, and then disconnectWith the door closed, remove the upper hinge It does not fall on you Models NomenclatureCompany Name Product R Refrigerator Label Location Freezer Refrigerator Specifications Warranty information Shelves and Bins Interior Views and DimensionsFreezer Refrigerator Dimensions of Refrigerator Inches Refrigerant Route in Refrigeration cycle Refrigeration Cycle and Cool Air Circulation RouteFreezer Evaporator Dryer Capillary Tube Cool Air Circulation Freezer Refrigerator Refrigerator Disassembly Mechanical DisassemblyFreezer Disassembly PlasticWire Drawer in Freezer······························ Door Handle Control PanelBeverage StationTM Door Gasket Refrigerator Light Refrigerator Door Light SwitchTempered Glass Shelf Plastic Drawers in Refrigerator Upper Ductwork Water FilterEvaporator Cover in the Refrigerator Evaporator Fan Motor Refrigerator Thermistor Evaporator in RefrigeratorCoolSelect ZoneTM Thermistor CoolSelect ZoneTM Thermistor Plastic Wire Drawer in Freezer Freezer Door Light SwitchDoor Bin in Freezer Freezer Shelf Disconnect 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 kit Evaporator Cover in Freezer Freezer Light Freezer Thermistor Evaporator in FreezerAmbient Thermistor Ice-MakerThermistor Water Solenoids Machine Compartment ＆ Electric BoxCondenser Fan Sub-condenser Operation Function Digital Panel Temperature Control Function Power FreezeQuick Ice function Quick Ice and Power Cool FunctionsChild Lock Function Ice & Water Dispenser Function Fan Motor Delay Function of the Machine CompartmentCoolSelect ZoneTM Function RS2666,RS2777 Filter Indicator Water Filter Indicator FunctionIce-Maker Function Initial Operation function Preparation of Ice-makerJudgement Remark ·MICOM Port Defrost Function Water Supply functionHeater on Heater OFF Defrost operation Self-Diagnostics Function Beeps will cease immediately when the doors are closedSelf-Diagnostics in the initial Power on Sound Function Error items of self-diagnostics ErrorFunction error Error items LED Display Details Remarks This mode, only the display LEDs for temperature will be on Restoration Function for Power OutageLoad Operation Check Function Set Point Shift Function Table of Set Point Shift Function Shift the freezer temperature sensor Operation Function Shift the Ice maker temperature sensor Shift the CoolSelect ZoneTM temperature sensor Circuit Descriptions Reset Circuit Source Power CircuitOscillator Circuit Terminal Door S/W Sensing Circuit Temperature Sensing CircuitMicom Change Key Scan and Display Circuit DEF-sensor and Bimetal work in parallelKey Scan and display operation Key Scan CoolSelect ZoneTM Panel Circuit Motor drive circuit Fan Motor Bldc Drive CircuitVoltages between high-speed and low-speed Option Circuit Eeprom CircuitLoad Drive Circuit D602 COMP. equivalence circuit of drive section If power is not on DiagnosticsStart Normal If the compressor and cooling fan motor don’t work normally AssemblyCheck after a lapse of 5 min Connection Exchange and troubleshoot Corresponding sensor If defrost functionPerform forced defrosting for F Room at a time 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 Short If Ding-Dong sounds continuously Start If alarm soundIf Beep sounds continuously Start Remove causes after Main PCB is normal buzzer normal Without sound of buzzer operation StartDisplay’ ZoneTM panel If the panel PCB is not working normally Connections of door S/W If fan doesn’t work ReferenceDoor open DC Door close If 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 itself Is the inside lamp filament cut? If the lamps of freezer / refrigerator does not light Check 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 condition Value Contents For safety, you must turn the power off LoadRef Check a load Ref. Def heater Lamp Lamp on the REF Ref Check Door S/W 834 878791 749 Part Name Specifcation ’TY Ref Service part lists of each circuit boardPage Page Refrigerator Division 2003 Code DA82-00001D Electronics