Samsung RM255BABB, RM255BASB If power is not on, Start, Normal, Plug in again and check for loose

Page 61

DIAGNOSTIC

6-1) If power is not ON

Caution!

At the power of main PCB, the 115V AC and a high-voltage over DC 170V occur. Please be careful wih repair and measurement

Start

To check the main PCB, please see the “operation descriptions and references” in the manual.

Check at the SMPS PBA.

-Check Main PCB connection.

-Check the connections between upper hinge and CABI-door.?

-Check the connections between door and panel PCB.

Is it plugged in?

YES

Is 115V AC applied to both

terminals of CN1?

YES

Is fuse on the SMPS PCB

breaking?

NO

Is 170V DC applied to both terminals (+ and -) of BD1?

YES

Is the 5.8V DC voltage applied between C and S of TOP S/W 246Y?

YES

Is 12V applied both terminals of C16?

YES

Is 5V applied both terminals of C19?

YES

Does Panel PCB work

normally?

YES

Is the load, such as

of relays and others normal?

YES

Is there any short or

break of PCB soldering?

NO

Normal

NO

NO

YES

NO

NO

NO

NO

NO

NO

Plug in again and check for loose

plug.

Check the connection and assembly of electric wires.

Exchange fuse (AC 250V 2.0A)

Check PCB Pattern and replace

BD1.

Replace PCB Assembly.

1)Replace U4(D10LC20U)

2)Replace SMPS PBA

Replace REG1(KA7805)

1)Check and troubleshoot the assembly of electric wires.

2)Replace panel PCB.

1)Replace the corresponding relay.

2)Check the contact of lead wire.

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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 modelsRM25 Model SpecificationAfter packing 386lbs Sensor Electric Parts SpecificationElectric Components Specifications Model Dispenser Home BarItems RunningPhotograph Optional Material SpecificationsPart 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 Condition Display Function Load Mode Checklist Load Item Load StatusRelevant 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 Remove two screws holding it to Open the Fresh Select Zone DoorLiner 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 DoorWater line must be connected to drinkable water only Do not overtighten the compression Note nutClose 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 FreezerTighten the screws 2 of the ice maker support Ice Dispenser Ice MakerFreezer 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 connectionExchange and repair COMP. Assembly Check connector for Contact failureIf 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 PCBIf the panel PCB is not working normally Where the Panel PCB key isn’t selectedIt 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 64.7#18 GND0.8V IC75 Input IC75 Output FAN107 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 DoCompressor Sub-condenser Hot Pipe Dryer Step valve Additional InformationSuction Pipe Freezer Refrigerator