Important Safety Notice

WARNING

This service guide is for service technicians with adequate backgrounds and electrical, electronic, and mechanical experience. Any attempt to repair a major appliance may result in personal injury and property damage.The manufacturer or dealer cannot be responsible for the interpretation of this information.

SAMSUNG ELECTRONICS AMERICA, INC.

Technical Service Guide

Copyright 2005

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Samsung RM255BABB, RM255BASB manual Important Safety Notice

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 Model Specification RM25After packing 386lbs Sensor Electric Parts Specification Running Specifications Model Dispenser Home BarElectric Components Items Optional Material Specifications PhotographPart Code Operating Instructions & Installation Digital Panel Temperature Control Operation By in inside function irrespective of current setting Power Freeze and Power cool OperationPower Freeze Operation Power cool Operation Cube / Crushed / ICE OFF Selection Function At Initial Power OnLock Function Able to operate on front panel Load Operation Condition Machine Room F-Fan Motor Delay FunctionWater Dispenser Function Light Operation Maximum torsion point Initial OperationReverse rotation CCW Forward rotation CW Ice extraction Horizontal position Interval about 880ms Water Supply Time Water Supply FunctionIce-Making Function Ice Extraction Function Bold numerals indicate relevant ice tray steps Horizontality operation 53.6 62.6 Defrosting FunctionDefrosting period is fixed to 8 hours Arctic Zone Fresh Select Zone Function Arctic Select Zone FunctionFunction Operation Operation start Function Operation SpecificationTemp .8 ~ 44.6 of the Fridge compartment Test KEY For the R compartment Forced Defrosting Function Display Function at Panel Alarm FunctionCommunication Error Display Function When water supply is finished, in the ice maker test mode Self-Diagnostics Function Operating Instructions & Installation BAD Item Trouble Status Self-Diagnostics Checklist CR Sensor ErrorDefrosting Sensor of R Trouble CF-FAN ErrorCR-FAN Error On Error Load Mode Checklist Load Item Load Status Load Condition Display FunctionRelevant 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 Flow sensor CR Room Temperature Shift FunctionCase of basic model, the following items cannot be set Maker For Ice Maker Disassembly and Reassembly Door Assy Removing the Front Leg Cover Removing 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 Door Do not overtighten the compression Note nut Water line must be connected to drinkable water onlyClose the filter cartridge cover Door Gasket Door Sub PartsControl Panel Door Handle Plastic Drawers in the Refrigerator Refrigerator Door Light SwitchRefrigerator Light Tempered Glass Shelf Plastic Drawer in Freezer Freezer Door Light SwitchFreezer Compartments Door Bin in Freezer Ice Dispenser Ice Maker Tighten the screws 2 of the ice maker supportFreezer 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 Water Tank Freezer ThermistorThermistor cover Screw Ice-Maker Thermistor Evaporator Fan Motor in Refrigerator Evaporator cover in the Refrigerator Fresh /Arctic Select ZoneTM Thermistor Evaporator in FridgeRefrigerator Thermistor Ductwork Thermistor Thermistor cover Upper Ductwork Water Solenoids Machine Compartment Electric BoxPCB-MAIN Assy Sub-condenser Removing the Arctic Select Zone Accessories Check at the Smps PBA Check Main PCB connection If power is not onStart Normal Check 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 Reference Check the soldering on the main PCB for Shorts & breaks If the ambient temperature sensor has troubleHow To Check Temperature Sensing in the manual If there is a trouble with self-diagnosissensor failure Gasket, food etc Alarm Sounds continuouslyrelated to the buzzerIf Ding-Dong sounds continuously Start If Beep sounds continuously Start Replace buzzer or panel PCB If the buzzer doesn’t soundMain PCB is normal, buzzer is Normal Buzzer is broken - replace it Where the Panel PCB key isn’t selected If the panel PCB is not working normallyIt is a care Condition If fan motor doesn’t working normalyDoor S/W Door Open 0V DC 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 Failure of panel PCB itself Replace connector Wire and switchReplace connector and wire If Dispenser LED Lamp doesnt light Wiring Diagram Connector Arrangement Main Board Circuitschematic Diagram Conn Ector Arrangement SMP S Board A voltage proportional to Power BUS 64.7 98.993.7 40.0 88.9 38.2 84.2 36.4 79.8 34.6 75.7 32.8 71.8 68.2 IC75 Input IC75 Output FAN #18 GND0.8V107 Remarks Motor Drive Circuit DescriptionsPrinciple of Operation Comparison in HIGH/LOW Speed XAA Reference Information 13-2 Q & a Problem Possible Causes What To Do Small or hollow cubes Problem Possible Causes What To Do Additional Information Compressor Sub-condenser Hot Pipe Dryer Step valveSuction Pipe Freezer Refrigerator