Samsung RM255BABB, RM255BASB manual Door Open DC, These signals will be inputted into Micom

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DIAGNOSTIC

Start

NO

Is the COMP OFF State?

FOR C/R-FAN

Is the voltage DC 0-1V between GND of the main-PCB section and\ CN76 pin No. 5?

NO

Is the voltage DC5V between the main

PCB section CN No.9 and No.14?

YES


						Execute Forced operation.
FOR C/F-FAN	YES

Is the voltage DC 0-1V between GND of the				YES
Is the voltage DC 0-1V between GND of the
main-PCB section and CN76 pin No. 2?
	NO

						Fan works normally.


Is the voltage DC5V between the main PCB				NO
				NO

section CN No.2 and No.7?


	YES					Troubleshoot the connections
						of door S/W.
						of door S/W.

						Apply power around 5 minutes				In the first power application, the
	Measure with the closed door.					Apply power around 5 minutes				In the first power application, the
	- Door Open: DC 0V					after the power OFF. (to prevent				freezer / refrigerator / compressor
	- Door Close : DC 5V					overload of compressor.)				fans work for 5 minutes regardless
	- Door Close : DC 5V					overload of compressor.)				fans work for 5 minutes regardless
										of the condition.


FOR R-RAN				FOR F-FAN
FOR R-RAN				FOR F-FAN

Does DC 0V alternate with DC 12V between	Does DC 0V alternate with DC 12V between	NO
Does DC 0V alternate with DC 12V between	Does DC 0V alternate with DC 12V between
GND of the main-PCB anf cn76pin NO.5?	GND of the main-PCB and CN76 pin No. 2?
YES	YES	Exchange or troubleshoot the
		main PCB.

Reference

CN76 No. 3(C/F-FAN), pin no.6(C/R-FAN) will get pulse signals which is generated when the motor rotates.

These signals will be inputted into MICOM.

Unless signals are not inputted in the motor operation, it will be ON 10 seconds after the fan OFF. But if signals are not still entered, the above operation will be performed four times more. Without signals entered continuously, the motor will get restarted after 10 minutes.

This function is effective to secure normal operation where the motor would be restrained due to foreign matters such as ice. Ref

Expected causes :

1.Fan motor has failure itself.

2.Wire connections have a trouble of contact.

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

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Contents RM255BARB RM255BASB RM255BABB Authorized Training Center Campuses Important Safety Notice Contents Precautionssafety Warnings Symbols Forbidden Product Specifications Manual This operation instruction covers various modelsModel Specification RM25After packing 386lbs Sensor Electric Parts SpecificationElectric Components Specifications Model Dispenser Home BarItems RunningOptional Material Specifications PhotographPart Code Operating Instructions & Installation Digital Panel Temperature Control OperationPower Freeze Operation Power Freeze and Power cool OperationPower cool Operation By in inside function irrespective of current settingLock Function At Initial Power OnAble to operate on front panel Cube / Crushed / ICE OFF Selection FunctionWater Dispenser Function Machine Room F-Fan Motor Delay FunctionLight Operation Load Operation ConditionReverse rotation CCW Forward rotation CW Ice extraction Initial OperationHorizontal position Interval about 880ms Maximum torsion pointIce-Making Function Water Supply FunctionIce Extraction Function Water Supply TimeBold numerals indicate relevant ice tray steps Horizontality operation Defrosting period is fixed to 8 hours Defrosting FunctionArctic Zone 53.6 62.6Function Arctic Select Zone FunctionOperation Fresh Select Zone FunctionTemp .8 ~ 44.6 of the Fridge compartment Function Operation SpecificationTest KEY Operation startFor the R compartment Forced Defrosting FunctionCommunication Error Display Function Alarm FunctionWhen water supply is finished, in the ice maker test mode Display Function at PanelSelf-Diagnostics Function Operating Instructions & InstallationBAD Item Trouble Status Self-Diagnostics ChecklistDefrosting ErrorSensor of R CR SensorCR-FAN Error CF-FAN ErrorOn Error TroubleLoad Mode Checklist Load Item Load Status Load Condition Display FunctionRelevant displays about load status is as follows Option Setting Function Changing to Optional ModeValue Item KEY FunctionChange for freezer compartment Temperature Change Table for the Freezer CompartmentKEY Temperature Change Table for the Refrigerator CompartmentCase of basic model, the following items cannot be set CR Room Temperature Shift FunctionMaker For Ice Maker Flow sensorDisassembly and Reassembly Door Assy Removing the Front Leg CoverRemoving the Freezer Door Removing the Refrigerator Door Open the Fresh Select Zone Door Remove two screws holding it toLiner on the right side of the rail To separate it Reattaching the Freezer Door Reattaching the Refrigerator Door Levelling Zone Open the Arctic Select Zone DoorDo not overtighten the compression Note nut Water line must be connected to drinkable water onlyClose the filter cartridge cover Control Panel Door Sub PartsDoor Handle Door GasketRefrigerator Light Refrigerator Door Light SwitchTempered Glass Shelf Plastic Drawers in the RefrigeratorFreezer Compartments Freezer Door Light SwitchDoor Bin in Freezer Plastic Drawer in FreezerIce Dispenser Ice Maker Tighten the screws 2 of the ice maker supportFreezer Light Upper Ductwork Auger Motor CaseScrews Pull the upper part of the evaporator cover slightly Partition in the FreezerEvaporator in Freezer Evaporator Fan MotorThermistor cover Screw Freezer ThermistorIce-Maker Thermistor Water TankEvaporator Fan Motor in Refrigerator Evaporator cover in the RefrigeratorRefrigerator Thermistor Evaporator in FridgeDuctwork Thermistor Thermistor cover Fresh /Arctic Select ZoneTM ThermistorUpper Ductwork PCB-MAIN Assy Machine Compartment Electric BoxSub-condenser Water SolenoidsRemoving the Arctic Select Zone Accessories Start If power is not onNormal Check at the Smps PBA Check Main PCB connectionCheck connector for Contact failure Exchange and repair COMP. AssemblyIf the compressor doesn’t work normally Perform forced defrosting for F R room one at a time ReferenceHow To Check Temperature Sensing in the manual If the ambient temperature sensor has troubleIf there is a trouble with self-diagnosissensor failure Check the soldering on the main PCB for Shorts & breaksIf Ding-Dong sounds continuously Start Alarm Sounds continuouslyrelated to the buzzerIf Beep sounds continuously Start Gasket, food etcMain PCB is normal, buzzer is Normal If the buzzer doesn’t soundBuzzer is broken - replace it Replace buzzer or panel PCBWhere the Panel PCB key isn’t selected If the panel PCB is not working normallyIt is a care Door S/W If fan motor doesn’t working normalyDoor Open 0V DC ConditionDoor Open DC These signals will be inputted into MicomIf Ice Cubed or/and Ice Crushed dont work normally Replace Inside lamp Replace or troubleshoot Door S/W If Indoor Lamp of Freezer/Refrigerator doesn’t lightIf Water Drawer doesnt work normally Preliminary Check Replace connector and wire Replace connector Wire and switchIf Dispenser LED Lamp doesnt light Failure of panel PCB itselfWiring Diagram Connector Arrangement Main Board Circuitschematic Diagram Conn Ector Arrangement SMP S Board A voltage proportional to Power BUS93.7 40.0 88.9 38.2 84.2 36.4 79.8 34.6 75.7 32.8 71.8 98.968.2 64.7IC75 Input IC75 Output FAN #18 GND0.8V107 Principle of Operation Motor Drive Circuit DescriptionsComparison in HIGH/LOW Speed RemarksXAA Reference Information 13-2 Q & a Problem Possible Causes What To DoSmall or hollow cubes Problem Possible Causes What To DoAdditional Information Compressor Sub-condenser Hot Pipe Dryer Step valveSuction Pipe Freezer Refrigerator