If power is not on, Start, Normal | Samsung RM255BABB, RM255BASB

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.

60

Image 61

Samsung RM255BABB, RM255BASB manual If power is not on, Start, Normal, Check at the Smps PBA Check Main PCB connection

Contents

RM255BARB RM255BASB RM255BABB Authorized Training Center Campuses Important Safety Notice Contents Precautionssafety Warnings Symbols Forbidden Product Specifications Manual This operation instruction covers various models RM25 Model SpecificationAfter packing 386lbs Sensor Electric Parts Specification Electric Components Specifications Model Dispenser Home BarItems Running Photograph Optional Material SpecificationsPart Code Operating Instructions & Installation Digital Panel Temperature Control Operation Power Freeze Operation Power Freeze and Power cool OperationPower cool Operation By in inside function irrespective of current setting Lock Function At Initial Power OnAble to operate on front panel Cube / Crushed / ICE OFF Selection Function Water Dispenser Function Machine Room F-Fan Motor Delay FunctionLight Operation Load Operation Condition Reverse rotation CCW Forward rotation CW Ice extraction Initial OperationHorizontal position Interval about 880ms Maximum torsion point Ice-Making Function Water Supply FunctionIce Extraction Function Water Supply Time Bold numerals indicate relevant ice tray steps Horizontality operation Defrosting period is fixed to 8 hours Defrosting FunctionArctic Zone 53.6 62.6 Function Arctic Select Zone FunctionOperation Fresh Select Zone Function Temp .8 ~ 44.6 of the Fridge compartment Function Operation SpecificationTest KEY Operation start For the R compartment Forced Defrosting Function Communication Error Display Function Alarm FunctionWhen water supply is finished, in the ice maker test mode Display Function at Panel Self-Diagnostics Function Operating Instructions & Installation BAD Item Trouble Status Self-Diagnostics Checklist Defrosting ErrorSensor of R CR Sensor CR-FAN Error CF-FAN ErrorOn Error Trouble Load Condition Display Function Load Mode Checklist Load Item Load StatusRelevant displays about load status is as follows Option Setting Function Changing to Optional Mode Value Item KEY Function Change for freezer compartment Temperature Change Table for the Freezer Compartment KEY Temperature Change Table for the Refrigerator Compartment Case of basic model, the following items cannot be set CR Room Temperature Shift FunctionMaker For Ice Maker Flow sensor Disassembly and Reassembly Door Assy Removing the Front Leg Cover Removing 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 Door Water 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 Gasket Refrigerator Light Refrigerator Door Light SwitchTempered Glass Shelf Plastic Drawers in the Refrigerator Freezer Compartments Freezer Door Light SwitchDoor Bin in Freezer Plastic Drawer in Freezer Tighten the screws 2 of the ice maker support Ice Dispenser Ice MakerFreezer Light Upper Ductwork Auger Motor Case Screws Pull the upper part of the evaporator cover slightly Partition in the Freezer Evaporator in Freezer Evaporator Fan Motor Thermistor cover Screw Freezer ThermistorIce-Maker Thermistor Water Tank Evaporator Fan Motor in Refrigerator Evaporator cover in the Refrigerator Refrigerator Thermistor Evaporator in FridgeDuctwork Thermistor Thermistor cover Fresh /Arctic Select ZoneTM Thermistor Upper Ductwork PCB-MAIN Assy Machine Compartment Electric BoxSub-condenser Water Solenoids Removing the Arctic Select Zone Accessories Start If power is not onNormal Check at the Smps PBA Check Main PCB connection Exchange 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 Reference How 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 & breaks If Ding-Dong sounds continuously Start Alarm Sounds continuouslyrelated to the buzzerIf Beep sounds continuously Start Gasket, food etc Main PCB is normal, buzzer is Normal If the buzzer doesn’t soundBuzzer is broken - replace it Replace buzzer or panel PCB If 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 Condition Door Open DC These signals will be inputted into Micom If 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 light If 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 itself Wiring Diagram Connector Arrangement Main Board Circuitschematic Diagram Conn Ector Arrangement SMP S Board A voltage proportional to Power BUS 93.7 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 Remarks XAA Reference Information 13-2 Q & a Problem Possible Causes What To Do Small or hollow cubes Problem Possible Causes What To Do Compressor Sub-condenser Hot Pipe Dryer Step valve Additional InformationSuction Pipe Freezer Refrigerator