Samsung RS2777, RS2544, RS2666 Appendix ⅠReference for circuit diagnostics, DC 0V Stop Condition

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Appendix Ⅰ(Reference for circuit diagnostics)

Ref.1) Wire connector on the cabinet door.

Ref. 2) How to check relay failure

Disconnect the connector of the main PCB

CN70 and CN71, then check the follows :

1. Measure the voltage at both terminals of a coil and

determine if the relay is working.

2. Measure the voltage at both terminals of a trigger and

determine if SSR is working.

3. Measure the resistance at both terminals of a load

contact, and determine if there is an error in voltages of coil and trigger.

Note) NC -> Normally Close (C terminal and ON terminal) NO -> Normally Open (C terminal and Open terminal)

C -> Common Terminal

Div. of contact	Voltage at both terminal of coil and trigger	Both terminals of contact	Resistance value

3-contact	DC 12V (Working Condition)	Between C and NO	0Ω (Short) -> Normal

		Between C and NC	∞Ω (Open) -> Normal
terminal

	DC 0V (Stop Condition)	Between C and NO	∞Ω (Open) -> Normal
Relay

		Between C and NC	0Ω (Short) -> Normal

2-contact	∼ DC 12V (load working condition)	Betweenbothterminalsofcontact	0Ω (Short) -> Normal
terminal
	∼DC 0V (load stop condition)	Betweenbothterminalsofcontact	∞Ω (Open) -> Normal
Relay
SSR	∼DC 12V (load working condition)	Betweenbothterminalsofcontact	About 4-5㏀(Short) -> Normal
	∼DC 0V (load stop condition)	Betweenbothterminalsofcontact	∞Ω (Open) -> Normal

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Contents Model RS2544 RS2622 RS2644 RS2666 RS2777 Important Safety Notice Contents Xtra FreshTM Door AlarmMulti-Flow System Xtra SpaceTMIt does not fall on you Cover using a screwdriver, and then disconnectTo protect refrigerator in movement With the door closed, remove the upper hingeProduct R Refrigerator Label Location NomenclatureModels Company NameFreezer Refrigerator SpecificationsWarranty information Refrigerator Interior Views and DimensionsShelves and Bins FreezerDimensions of Refrigerator Inches Capillary Tube Refrigeration Cycle and Cool Air Circulation RouteRefrigerant Route in Refrigeration cycle Freezer Evaporator DryerCool Air Circulation Freezer Refrigerator PlasticWire Drawer in Freezer······························ Mechanical DisassemblyRefrigerator Disassembly Freezer DisassemblyDoor Gasket Control PanelDoor Handle Beverage StationTMPlastic Drawers in Refrigerator Refrigerator Door Light SwitchRefrigerator Light Tempered Glass ShelfEvaporator Fan Motor Water FilterUpper Ductwork Evaporator Cover in the RefrigeratorCoolSelect ZoneTM Thermistor Evaporator in RefrigeratorRefrigerator Thermistor CoolSelect ZoneTM ThermistorFreezer Shelf Freezer Door Light SwitchPlastic Wire Drawer in Freezer Door Bin in FreezerUnlock the locking tabs to separate the ice maker kit Ice maker is located inside of the ice dispenser assemblyDisconnect the ice maker wire connector Auger Motor CaseEvaporator Cover in Freezer Freezer LightIce-MakerThermistor Evaporator in FreezerFreezer Thermistor Ambient ThermistorSub-condenser Machine Compartment ＆ Electric BoxWater Solenoids Condenser FanOperation 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 ·MICOM Port Preparation of Ice-makerInitial Operation function Judgement RemarkHeater OFF Water Supply functionDefrost Function Heater onDefrost operation Sound Function Beeps will cease immediately when the doors are closedSelf-Diagnostics Function Self-Diagnostics in the initial Power onError items LED Display Details Remarks ErrorError items of self-diagnostics Function errorSet Point Shift Function Restoration Function for Power OutageThis mode, only the display LEDs for temperature will be on Load Operation Check 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 Terminal Source Power CircuitReset Circuit Oscillator CircuitChange Temperature Sensing CircuitDoor S/W Sensing Circuit MicomKey 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 D602 Eeprom CircuitOption Circuit Load Drive CircuitCOMP. equivalence circuit of drive section Normal DiagnosticsIf power is not on StartConnection AssemblyIf the compressor and cooling fan motor don’t work normally Check after a lapse of 5 minPerform forced defrosting for F Room at a time If defrost functionExchange and troubleshoot Corresponding sensor Check if the iced solder of main PCB is Short If the temperature sensor of F and R room has troubleIf there is a trouble with self-diagnosis If the ambient sensor has trouble StartRemove causes after If alarm soundIf Ding-Dong sounds continuously Start If Beep sounds continuously StartDisplay’ Without sound of buzzer operation StartMain PCB is normal buzzer normal ZoneTM panel If the panel PCB is not working normallyDoor close If fan doesn’t work ReferenceConnections of door S/W Door open DCPanel PCB has trouble for itself If CoolSelect ZoneTM isn’t operated normally RS2555, RS2577If the lamp of CoolSelect ZoneTM is not lit Start If the Panel PCB key isn’t selectedIs 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 12V load working condition Appendix ⅠReference for circuit diagnosticsDC 0V Stop Condition Resistance valueRef. Def heater For safety, you must turn the power off LoadValue Contents Ref Check a loadLamp Lamp on the REF Ref Check Door S/W749 878834 791Part Name Specifcation ’TY Ref Service part lists of each circuit boardPage Page Refrigerator Division 2003 Code DA82-00001D Electronics