Samsung RM255BASB If there is a trouble with self-diagnosissensor failure, See Circuit Operation

Page 64

DIAGNOSTIC

6-4) If there is a trouble with self-diagnosis(sensor failure)

-Error in sensor can be seen on the front display of refrigerator. If sensor failure is found when power is initially impressed to refrigerator, the product will not work, and display is repeatedly blinking in the trouble occurred sensor.

-Even if sensor has failure during the oeration refrigerator will not stop working but can’t run the normal cooling operation because of being operated in the Emergency Operation mode. Thus, be sure to follow instructions in the manual when you make self-diagnosis.

1)If the ambient temperature sensor has trouble

This model has an ambient temperature sensing operation in the panel PCB. The sensed information is communicated between main PCB and panel PCB. So you must review the causes of failure without disassembling the panel PCB. If it displays the sensor ERROR in the parts related to the ambient temperature sensor on the panel, it is understood that the communication with MAIN PCB is normal. In this case, check the sensor unit, missing wires and short & breaking or wires, etc.

Start

See “CircuitOperation” and “HowTo CheckTemperaturesensor” inthe manual.(Checkvoltageatbothsensor terminalsontheupperhingeconnectorof freezer,ormeasureresistanceafter disassemblingtheconnector.)

ComparetheambienttempwithtempTable whenusingthemeasurementmethod describedonHowToCheckTemp Sensing.

Is Main PCB connector(CN50)

inserted correctly?

YES

Is the ambient temperature

sensor normal?

YES

Is the sensor voltage measured at the upper hinge connector normal?

NO

NO

NO

Troubleshoot the connector’s contact

failure or missing

Replace temperature sensor.

Measure the sensor-connected No. 7

No.8, after

YES

disconnecting wires from the upper hinge connector.

No trouble with PCB and temperature sensor.

Recheck connector for contact failure.

Check the soldering on the main PCB for

shorts & breaks.

2)If the temperature sensor of Refrigerator has trouble (Apply to the other sensor checks.) Start

See Circuit Operation” and “How To Check Temperature Sensing” in the manual.

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿ ￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿ ￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿ ￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿ ￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿ ￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿ ￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿ ￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿ ￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

￿￿￿ ￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿

Is the unit of refrigerator

sensor normal?

YES

Is Main PCB connector

(CN30) inserted correctly?

YES

Is the insertion sequence

of connector(CN30) wire identical to the circuit diagram?

YES

NO

NO

NO

Exchange the temperature sensor.

Troubleshoot the connector’s

contact failure or missing

Correct the wrong configuration of connector wire-if it is not inserted or incorrectly inserted to coincid with the circuit diagram.

See Circuit Operation” and

Is the input of voltage to Main

NO

 

MICOM pin No. 57 normal?

 

“How To Check Temperature

 

 

 

 

 

 

Sensing” in the manual.

 

YES

 

 

 

No trouble with PCB and temperature sensor.

Recheck the connector for an error of contact.

Check the soldering on the main PCB for

shorts & breaks

63

Page 63 Page 65
Image 64
Page 63 Page 65
Contents RM255BARB RM255BASB RM255BABB Authorized Training Center Campuses Important Safety Notice Contents Precautionssafety Warnings Symbols Forbidden Product Specifications This operation instruction covers various models ManualRM25 Model SpecificationAfter packing 386lbs Electric Parts Specification SensorSpecifications Model Dispenser Home Bar Electric ComponentsItems RunningPhotograph Optional Material SpecificationsPart Code Operating Instructions & Installation Temperature Control Operation Digital PanelPower Freeze and Power cool Operation Power Freeze OperationPower cool Operation By in inside function irrespective of current settingAt Initial Power On Lock FunctionAble to operate on front panel Cube / Crushed / ICE OFF Selection FunctionMachine Room F-Fan Motor Delay Function Water Dispenser FunctionLight Operation Load Operation ConditionInitial Operation Reverse rotation CCW Forward rotation CW Ice extractionHorizontal position Interval about 880ms Maximum torsion pointWater Supply Function Ice-Making FunctionIce Extraction Function Water Supply TimeBold numerals indicate relevant ice tray steps Horizontality operation Defrosting Function Defrosting period is fixed to 8 hoursArctic Zone 53.6 62.6Arctic Select Zone Function FunctionOperation Fresh Select Zone FunctionFunction Operation Specification Temp .8 ~ 44.6 of the Fridge compartmentTest KEY Operation startForced Defrosting Function For the R compartmentAlarm Function Communication Error Display FunctionWhen water supply is finished, in the ice maker test mode Display Function at PanelOperating Instructions & Installation Self-Diagnostics FunctionSelf-Diagnostics Checklist BAD Item Trouble StatusError DefrostingSensor of R CR SensorCF-FAN Error CR-FAN ErrorOn Error TroubleLoad Condition Display Function Load Mode Checklist Load Item Load StatusRelevant displays about load status is as follows Changing to Optional Mode Option Setting FunctionKEY Function Value ItemTemperature Change Table for the Freezer Compartment Change for freezer compartmentTemperature Change Table for the Refrigerator Compartment KEYCR Room Temperature Shift Function Case of basic model, the following items cannot be setMaker For Ice Maker Flow sensorDisassembly and Reassembly Removing the Front Leg Cover Door AssyRemoving 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 Open the Arctic Select Zone Door ZoneWater line must be connected to drinkable water only Do not overtighten the compression Note nutClose the filter cartridge cover Door Sub Parts Control PanelDoor Handle Door GasketRefrigerator Door Light Switch Refrigerator LightTempered Glass Shelf Plastic Drawers in the RefrigeratorFreezer Door Light Switch Freezer CompartmentsDoor Bin in Freezer Plastic Drawer in FreezerTighten the screws 2 of the ice maker support Ice Dispenser Ice MakerFreezer Light Auger Motor Case Upper DuctworkPartition in the Freezer Screws Pull the upper part of the evaporator cover slightlyEvaporator Fan Motor Evaporator in FreezerFreezer Thermistor Thermistor cover ScrewIce-Maker Thermistor Water TankEvaporator cover in the Refrigerator Evaporator Fan Motor in RefrigeratorEvaporator in Fridge Refrigerator ThermistorDuctwork Thermistor Thermistor cover Fresh /Arctic Select ZoneTM ThermistorUpper Ductwork Machine Compartment Electric Box PCB-MAIN AssySub-condenser Water SolenoidsRemoving the Arctic Select Zone Accessories If power is not on StartNormal Check at the Smps PBA Check Main PCB connectionExchange and repair COMP. Assembly Check connector for Contact failureIf the compressor doesn’t work normally Reference Perform forced defrosting for F R room one at a timeIf the ambient temperature sensor has trouble How To Check Temperature Sensing in the manualIf there is a trouble with self-diagnosissensor failure Check the soldering on the main PCB for Shorts & breaksAlarm Sounds continuouslyrelated to the buzzer If Ding-Dong sounds continuously StartIf Beep sounds continuously Start Gasket, food etcIf the buzzer doesn’t sound Main PCB is normal, buzzer is NormalBuzzer 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 If fan motor doesn’t working normaly Door S/WDoor Open 0V DC ConditionThese signals will be inputted into Micom Door Open DCIf Ice Cubed or/and Ice Crushed dont work normally If Indoor Lamp of Freezer/Refrigerator doesn’t light Replace Inside lamp Replace or troubleshoot Door S/WIf Water Drawer doesnt work normally Preliminary Check Replace connector Wire and switch Replace connector and wireIf Dispenser LED Lamp doesnt light Failure of panel PCB itselfWiring Diagram Connector Arrangement Main Board Circuitschematic Diagram Conn Ector Arrangement SMP S Board Power BUS A voltage proportional to98.9 93.7 40.0 88.9 38.2 84.2 36.4 79.8 34.6 75.7 32.8 71.868.2 64.7#18 GND0.8V IC75 Input IC75 Output FAN107 Motor Drive Circuit Descriptions Principle of OperationComparison in HIGH/LOW Speed RemarksXAA 13-2 Q & a Problem Possible Causes What To Do Reference InformationProblem Possible Causes What To Do Small or hollow cubesCompressor Sub-condenser Hot Pipe Dryer Step valve Additional InformationSuction Pipe Freezer Refrigerator
Top Page Image Contents