SAMSUNG Home Appliance Service For the latest information, Please access to our service web site (www.samsungasc.
WARNING IMPORTANT SAFETY NOTICE The service guide is for service men with adequate backgrounds of 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 All rights reserved.
Contents 1. Introduction ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 4 2. Installation ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 5 3. Nomenclature ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙6 4. Specifications ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙7 5. Warranty information ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙8 6. Interior Views and Dimensions ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙9 7. Refrigeration Cycle and Cool Air Circulation Route 8.
1. INTRODUCTION ● A newly developed SAMSUNG side by side refrigerator in 2005 has the following characteristics. 1) Twin Cooling System ∙The refrigerator and the freezer have two evaporators. Given this independent system, the freezer and the refrigerator are cooled individually as required and are, therefore, more efficient. Food odor from the refrigerator does not affect food in the freezer due to separate air flow circulation.
2. INSTALLATION 1) To protect refrigerator in movement Use padded hand truck as shown. If entrance width is less than 39〃, remove doors prior to installation and reattach doors according to procedure below. 2) Remove all protective tape and pad in refrigerators. Connect water lines and power cord. Adjust the clearance between the doors. 3) Set the temperature control to the temperature and wait for an hour. The refrigerator should get slightly chilled and the motor runs smoothly.
3. Nomenclature R S 25 3 B A SB / XAA Buyer Code COLOR ; SBS SB-STAINLESS PLATINUM WW-SNOW WHITE VQ-BISQUE GLOSSY BB-BLACK RB-REAL STAINLESS A ; A-TOP PJT BUYER ; BEST BUY OPTION ; SBS 3-GOOD 5-BETTER 7-BEST Capacity ; CU.
4. Specifications ELECTRICAL SPECIFICATIONS Defrost Control From 24 to 32 hrs Defrost Thermistor(502AT) 50℉(off) Electrical Rating AC115V 60Hz 11.6 Amps Maximum Current Leakage 0.25 mA Maximum Ground Path Resistance 0.1 Ohm Energy Consumption KWH/mo. Freezer Refrigerator NO LOAD PERFORMANCE Ambient Temperature Refrigerator,℉ Freezer,℉ Run Time,% 70℉ 34�46 -14�8 �40 90℉ 34�46 -14�8 �60 Fan Fan REFRIGERATION SYSTEM (Air inlet) Refrigerant Charge (R134a) 7.76 oz Compressor(MK183C-L2U) 532.
5. Warranty information SAMSUNG REFRIGERATOR (18 Cubic Feet and Larger Capacity) LIMITED WARRANTY TO ORIGINAL PURCHASER This SAMSUNG brand product, as supplied and distributed by Samsung Electronics America, Inc.
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Interior Views and Dimensions 6-2) Dimensions of Refrigerator(RS253BA/255BA/257BA) (Inches) 10
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Refrigeration Cycle and Cool Air Circulation Route 7-2) Cool Air Circulation Refrigerator Freezer 12
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8. Mechanical Disassembly 8-1) Refrigerator Disassembly Control Panel Door Gasket 1. Insert a flat-blade screwdriver on the slot as shown, and unlock the tabs. 2. Disconnect the wire connector. The door gasket is a molded gasket set into a channel located in the door liner. 1. Open the door. 2. Grasp the gasket and pull in an outward motion until the molded gasket separates from the door liner. Door Handle The door handles allow access into the refrigerator and freezer.
Mechanical Disassembly Refrigerator Light Plastic Drawers in Refrigerator The refrigerator lights are located in the upper and lower portion of refrigerator. 1. Pull out the screw cap and remove the screw. 2. To access the lower lights, pull out the screw cap and remove the screw. 3. Remove the lamp cover by unlocking the tabs and pulling the cover down. Drawers are designed for storage of fruits, vegetables, and deli items. The drawers are located in the lower portion of the refrigerator. 1.
Mechanical Disassembly Water Filter The water filter is located in the upper right-hand corner of the refrigerator. The water filter filters water for the ice maker and the water dispenser. 1. Turn the water filter 1/2 turn counterclockwise and pull it down. 2. To install the filter, align the indication mark (unlock position) and push it up while turning 1/2 turn clockwise until the lock position is aligned. Do not over tighten. Upper Ductwork 1. Remove the screw caps (2) and screws (5). 2.
Mechanical Disassembly Evaporator in Refrigerator Refrigerator Thermistor Evaporator is located in the bottom of refrigerator. 1. Take off the ductwork in refrigerator. 2. Disconnect the wire connector.(Heater and Thermistor) 3. Desolder the capillary tube and the suction line from the evaporator. 4. Remove the evaporator. 5. With a file, score the capillary tube just upstream of the soldered point. Break off the soldered section to help prevent solder from plugging the tube during soldering. 6.
Mechanical Disassembly 8-2) Freezer Disassembly Door Bin in Freezer The door bins allow storage of perishable items. 1. Push the bin up and slide it out. Freezer Shelf The shelves slide out for easy access for frozen items. 1. Slide the shelf out until it reaches its stop. 2. Tilt down and slide it out of the compartment. Freezer Door Light Switch This switch is located in the left-hand portion of the freezer and sends a signal to the processor. 1.
Mechanical Disassembly top of the liner, and slide the ice maker in. 5. Tighten the screws (2) of the ice maker support. FRONT LOCKING TAB TAB HOLES FRONT OF ICE TRAY GEARED MOTOR SHAFT Auger Motor Case This shelf is designed to support the ice maker ＆ ice dispensed and Xtra SpaceTM. 1. Remove the Xtra SpaceTM cover to push it down and pull front. 2. Slide the partition out. 3. Remove the screws (2) on the bottom front of the case. 4. Slide out the case while disconnecting the wire connect.
Mechanical Disassembly Freezer Light Upper Ductwork 1. Remove the screw cap and screw. 2. Slide the upper fan ductwork out while disconnecting the wire connector (Lamp and Thermistor). The freezer light is located in the bottom of the auger motor case. The light is covered by an opaque cover. 1. Remove the screw and the light cover. Evaporator Cover in Freezer 1. Pull out the screw caps and remove screws (6). 2. Remove the ductwork of the evaporator fan in the direction of the arrow as shown. 3.
Mechanical Disassembly Evaporator in Freezer Evaporator is located in the bottom of freezer to produce cold air driven across the evaporator coils. 1. Take off the ductwork in Freezer. 2. Disconnect the wire connector (Heater, Bimental, and Thermistor). 3. Desolder the inlet and outlet tubes. 4. Remove the evaporator. 5. Take the same steps to seal the system as mentioned earlier. Freezer Thermistor Ambient Thermistor The ambient thermistor is located inside the upper hinge cover.
Mechanical Disassembly 8-3) Machine Compartment Disassembly 3. Disconnect water tubes (3). Machine Compartment ＆ Electric Box 1. Disconnect the power cord of the refrigerator. 2. Remove the fixed screws (6) of compressor cover. Condenser Fan 3. Slide up and take off the compressor cover to see the machine compartment. The condenser Fan is located in the middle of machine compartment. It cools down the subcondenser and the compressor. 1. Disconnect the condenser fan wire. 2.
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9. Operation Function 9-1) Digital Panel for RS253BA for RS255BA RS257BA 9-2) Temperature Control Function When the system power is initally engaged, the default set temperature are -4℉ for the freezer and 38℉ for the set refrigerator, respectively. The numbers shown on the digital display panel stand for the actual compartments temperatures. When the compartment temperatures go down, so do the numbers on the display panel, and finally they reach the set temperatures.
Operation Function 9-3) Power Freeze and Power Cool Functions Select the Power Freeze or Power Cool buttons separately. These buttons are toggled ON and OFF and the indicators as well. Although you select Power Freeze or Power Cool, the set temperatures in the freezer and refrigerator are not changed. ● The set temperatures for the compartments can be changed while these functions are in use.
Operation Function 9-5) Ice & Water Dispenser Function ● Among several ice-maker functions, the ice extraction function is performed by mechanical system. Only the relay control for a cubed-ice dispensing and the SSR control for the ice chute door are performed electronically. 1) Select Cubed/Crushed/Ice-off function 1-1) The Ice Type button selects Cubed/Crushed/Ice-off options in sequence. 1-2) A default setting is Cubed option.
Operation Function 1) Select function 1-1) Using Select button, Cool, Chill(30℉), and Soft Freeze(23℉) options can be selected in sequence. Cool option maintains a set temperature of the refrigerator. 2) Quick Cool function 2-1) If the Quick Cool is selected, LEDs will flash 60 and Min. The count will be decreased in every minute. 2-2) To cancel this function, press Quick Cool button again or Thaw button or Select button. Otherwise, it will be terminated 60 minutes later automatically.
Operation Function 2) Preparation of Ice-maker 2-1) Connect the water line to the water supply valve of refrigerator to supply water. (See how to connect a water supply line in the owner’s manual.) 2-2) Push the bucket back fully so that the guide-ice of ice maker should not touch the back of bucket. (If the back of bucket touches the guide-ice of ice maker, the ice maker will not make ice any more because of a ice full signal.
Operation Function 5) Ice off function 5-1) When the Ice off operation is selected by Ice Type button, the ice making process will cease. 5-2) When the ice making process ceases, the final state will be the ice tray with supplied water. 5-3) When Cubed or Crushed operation is selected again, the control board will check an accumulated time period. After making it 60 minutes and when the ice tray temperature is acceptable, ice ejection process will begin.
Operation Function 9-11) Forced Operation Function (Pull-down / Refrigerator Defrost / Refrigerator . Freezer-Defrost / Cancellation) This function enables a pull-down mode, a defrost mode for the refrigerator only, a defrost mode for the freezer and the refrigerator at the same time, and a cancellation of this function. ● Press Power Freeze and Fridge Temp. buttons for 8 seconds simultameously to get in the ready mode for a forced operation.
Operation Function 9-12) Sound Function 1) Sound function 1-1) To make sure a command input, whenever a button is pressed, a “ding-dong” sounds. 1-2) When two or more buttons are pressed simultaneously or if a wrong button is pressed, there is no sound. 2) Door Open Alarm 2-1) When the doors remain open for 2 minutes, there are 10 times beeps. 2-2) If the doors continue to remain open more than 2 minutes, the additional 10 beeps interval will change to 1 minute.
Operation Function � Self-diagnostics check list NO ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩ ⑪ ⑫ ⑬ ⑭ Error ICE MAKER SENSOR REFRIGERATOR SENSOR REFRIGERATOR DEFROST SENSOR REFRIGERATOR FAN ERROR ICE MAKER function error CoolSelect ZoneTM SENSOR REFRIGERATOR DEFROST ERROR EXIT-SENSOR FREEZER SENSOR FREEZER DEFROST ERROR FREEZER FAN ERROR CONDENSER FAN ERROR FREEZER DEFROST ERROR PLC ERROR(Power Line Communication) If any LCDs blink, the corresponding sensors and components must be checked for an error.
Operation Function 9-15) Load Operation Check Function 1) In the normal operation, press Power Freeze and Power Cool buttons simultaneously for 6 second, then the display panel will blink for 2 seconds. 2) Press Fridge Temp. button ⓐ to get into this check mode with an audible tone. 3) Each illuminating LCD segment stands for the component which has an ouput signal from the control board. 4) This mode will terminate automatically after 30 seconds.
Operation Function 1) Initially, all products set the code, “0” 2) After 20 seconds from adjustment, a new setting will be stored in EEPROM and return to the normal display. 3) Freezer Temp, Fridge Temp., Ice maker water supply, Ice tray temperature, and CoolSelect ZoneTM temperature can be adjusted with this function. 9-18) Table of Set Point Shift Function 1) Shift the freezer temperature sensor Reference Value 0 Code Temp. shift 0 1 2 3 4 5 6 7 0 －1.0℉ －2.0℉ －3.0℉ －4.0℉ －5.0℉ －6.0℉ －7.
Operation Function Example) If you are lowering the current temperature of the freezer by －6.0℉ 2) Shift the refrigerator temperature sensor Reference Value Code 0 1 2 3 4 5 6 7 1 Temp. shift 0 －1.0℉ －2.0℉ －3.0℉ －4.0℉ －5.0℉ －6.0℉ －7.0℉ Code Temp. shift 8 9 10 11 12 13 14 15 1.0℉ 2.0℉ 3.0℉ 4.0℉ 5.0℉ 6.0℉ 7.0℉ 8.0℉ Example) If you are raising the current temperature of the refrigerator by +3.
Operation Function ■The following options is limited to a model with the Ice Maker. 4) Shift the Ice maker temperature sensor Reference Value Code 0 1 2 3 4 5 6 7 5) Shift the CoolSelect ZoneTM temperature sensor. 4 Reference Value Ice maker temperature sensor Code 1.5℉ 3.2℉ 0 5℉ 6.8℉ 2 8.6℉ 10.5℉ 4 -0.5℉ -2.2℉ 6 1 3 5 7 36 20 CoolSelect ZoneTM temperature sensor 0℉ -1.0℉ -2.0℉ -3.0℉ 1.0℉ 2.0℉ 3.0℉ 4.
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Circuit Descriptions 10-1) Source Power Circuit This circuit shows SMPS(Switch Mode Power Supply) which converts AC input voltage (115V, 60Hz) to a high DC voltage (170V). The input AC source power is converted to DC through a wave rectifier (BD1) and the converted DC power will generate a constant waveform on the switching transformer using a high speed (100KHz) switching motion of TOP223Y.
Circuit Descriptions 10-4) Door S/W Sensing Circuit Terminal Operation Volt(state) DOOR CLOSE 0V (LOW) DOOR OPEN 5V (HIGH) DOOR CLOSE 0V (LOW) DOOR OPEN 5V (HIGH) Freezer Ref. 1) The terminals, ② and ⑥ of the connector (CN30) are grounded, and DC5V (Vcc) is supplied to the terminals, ⑤ and ⑥ through the resistors, R404 and R403 for the freezer and the refrigerator door, respectively.
Circuit Descriptions Note) 1) F-DEF-sensor and Bimetal work in parallel. 2) At the first power on, an open error (5V input to MICOM) can be detected by self-diagnostics. A short error will be ignored. 3) In self-diagnostics during a normal operation, only an open error can be detected. 4) The F-DEF heater will be off at the set temperature after the bimetal is off. 10-6) Display Circuit The panel exchanges data through communication between Main PCB and Panel PCB.
Circuit Descriptions 10-7) CoolSelect ZoneTM Panel Circuit 1) CoolSelect ZoneTM display panel and temperature sensor 1-1) CoolSelect ZoneTM is referred to as a storage drawer to implement features of Quick cool, Thaw, and Select (Soft Freeze, Chill, and Cool). 1-2) CoolSelect ZoneTM has an additional display panel. Panel LED are off while the doors are closed. When a door is open, micro-processor senses its signal and LEDs will be on.
Circuit Descriptions 2-1) CoolSelect ZoneTM Drawer is controlled by a damper to supply or block cold air. For Quick Cool, the damper will be close. So cold air is supplied only to CoolSelect ZoneTM Drawer. For Thaw, the evaporator heater of refrigerator is ON and the damper is controlled by the refrigerator temperature. 2-2) The stepping motor controlled by a Driver IC TA7774P(IC7) operates the damper. The stepping motor uses 4 combined signals to open and close the damper.
Circuit Descriptions 1-3) When the motor rpm is in 600�700, it will stop automatically and it tries to resume after 10 seconds. If the motor is not working properly after 5 time trials, it will rest for 10 minutes, then try to resume again. This process will be done continuously. Note) If there is an abnormal situation for the motor, the self-diagnostics will show the corresponding LCD segment. 10-9) EEPROM Circuit EEPROM is semiconductor memory not to be erased.
Circuit Descriptions 4) The principles of other loads is the same as 3) item described. Note) SSR(Solid State Relay) is a kind of Relay. *COMP.
11. Diagnostics 11-1) If power is not ON Caution! To check the main PCB, please apply descriptions of operation and references in the manual. At the power of main PCB, the 115V power and a high-voltage over DC 170V occur. Please take care of yourself on repair and measurement. Start Is 115V AC fuse down? Is power 115V both terminals of CN10? Is fuse on main PCB down? Is DC 170V impressed to both terminals of BD1? YES NO Check the exchange of fuse and disconnection cause.
Diagnostics 11-2) If the compressor and cooling fan motor don’t work normally Start NO Did 5 min pass after COMP. OFF? YES Did buzzer sound on forced operation? (Check certainly after forced start.) NO NO Apply Ref.4 Is MICOM No.28 High?(5V) Exchange MICOM and PCB. NO YES Does compressor work with forced operation? Apply Ref. 7 Check after a lapse of 5 min. Is freezer sensor normal? YES YES Is the temp. sense of main PCB Normal? Is the voltage of IC03 pin No.
Diagnostics 11-3) If defrost function Start Is F, R defrosting sensor by self-diagnosis normal? NO Exchange and troubleshoot the corresponding sensor. YES NO Is F, R Room defrosting heater normal? YES � See Ref. 3: ‘Check load’ in the manual. Is temp. of the defrosting sensor below 5? � Make decision on the basis of ref. 4 and 6 in the manual. NO Check temp. fuse, breaking of heater wire, contact of wire and so on. Run forced operation for a specified period.
Diagnostics 11-4) If there is a trouble with self-diagnosis - Error of sensor can be seen on the front display of refrigerator. If power is impressed to refrigerator first, an failure of sensor is found. The refrigerator will stop working and display(blink) the region of trouble-occurred sensor repetitively. - Even if sensor has failure during the operation, the refrigerator will not stop working but can run the normal cooling operation because of being operated in the Emergency Operation mode.
Diagnostics 11-5) If alarm sound 1) If “Ding-Dong” sounds continuously Start Yes Isn’t the door opened minutely? No slightly Isn’t water penetrated into the door S/W? NO Remove causes after comprehending the conditions of interference by door gasket, food etc. YES � Freezer door MICOM No. 60, Fridge door MICOM No. 54 – Regular voltage are 5V to Open : 0V to Close. Is the input voltage of main No. 60 and 54 changed at door-open, door-close? Exchange the door S/W.
Diagnostics 3) Without sound of buzzer operation This model is equipped with a buzzer in Panel PCB. When there is no buzzer sound with button input, forced operation or door open, disassemble Panel PCB and check if the buzzer is broken or soldering is defective. It is difficult to repair Panel PCB because it consists of SMD components. When it is not a repairable defect regarding button press or minor scratch, it is recommended to change the Ass’y.
Diagnostics 11-6) If the panel PCB is not working normally: 1) When the entire Panel PCB does not light up or a portion of LCD does not light up Start � Refer to Circuit Diagram in this manual or on the back of the product.
Diagnostics 11-7) If fan doesn’t work: Reference � The refrigerator has been applied with the BLDC fan motor for RS253BA, R room Fan is AC motor used. The BLDC motor is driven by DC 8-12V. � Under the normal condition of COMP ON, it is operated together with F-FAN motor. With operation of the CoolSelect ZoneTM function, the F-Fan motor will not work. If the door is opened and closed once at a high ambient temperature, the BLDC motor would be operated after a 1-minute or longer delay.
Diagnostics 11-8) If CoolSelect ZoneTM isn’t operated normally (RS2556, RS2578) 1) If the lamp of CoolSelect ZoneTM is not lit. Start Is the connector of CoolSelect ZoneTM inserted correctly in the fridge? NO YES Is the connector of main PCB (CN51) inserted correctly? NO YES Where the Panel key isn’ t selected: Is the connector of CoolSelect ZoneTM panel PCB inserted ? NO YES Is lighting operated normally when the exchange of CoolSelect ZoneTM panel PCB? YES NO 1.
Diagnostics 11-9) If the lamps of freezer / refrigerator fail in lighting: Caution! 1. When you are exchanging the lamp of freezer, please exchange or troubleshoot it with the power OFF to avoid an electric shock. 2. Please keep in mind you do not get burnt by the excessive heating of an incandescent light bulb. Start YES Is the inside lamp’s filament cut? How to check : Separate the door S/W and measure its resistance with a measure.
Diagnostics 11-11) If Crushed Ice/Cubed Ice doesn’t work properly: The condition of close on operation is subject to the freezer door. Start NO Is ice ejected? YES Does ice in the ice tray exist ? NO YES 1) Check the ice-ejector S/W. 2) Check the door S/W. 3) Check the ice moving motor. 4) Check the cut of wire in the Ice moving Motor section. Do you see Ice Stop on the digital panel? YES 1) Check the water hose for folding or fastening.
12. Reference for circuit diagnostics 12-1) Wire connector on the cabinet door. 12- 2) How to check relay failure Disconnect the connector of the main PCB CN70 and CN71, then check the follows : 1. Measure the voltage at both terminals of a coil and determine if the relay is working. 2. Measure the voltage at both terminals of a trigger and determine if SSR is working. 3. Measure the resistance at both terminals of a load contact, and determine if there is an error in voltages of coil and trigger.
Reference for circuit diagnostics 12-3) Check a load Unplug the powercord and disconnect the main PCB CN70 and CN71, the measure the follows : 1. As shown in table below, measure the resistance between terminals, check load trouble and wire connection error. 2. The diagram of circuit was drawn based on the maximum load. When a repair is needed, see the electric wiring diagram on the back of refrigerator to troubleshoot the corresponding model. 3. For safety, you must turn the power off.
Reference for circuit diagnostics 12-4) Check sensors Disconnect the connector from the Main PCB, than measure the resistance of the following sensors. 1. Check the resistance the Freezer sensor between the CN30 ③ and CN72 ⑦ 2.Check the resistance the Fridge Room sensor between the CN30 ⑦ and CN72 ⑦ 3. Check the resistance the F Defrosting sensor between the CN30 ④ and CN72 ⑦ 4. Check the resistance the R Defrosting sensor between the CN30 ⑧ and CN72 ⑦ 5. Check the resistance between the no.
Reference for circuit diagnostics 12-6) Table of temperature sensor according to resistance and voltage conversion. The input voltage to the MICOM PORT could be different by a hardware. This is a table based on the voltage using the 10kohm-F. MICOM PORT voltage when the sensor is open: about DC 5V(Vcc LEVEL) MICOM PORT voltage when the sensor is shorted: about DC 0V(Ground LEVEL) Temp.(℉) Resistance(㏀) -43.6 -41.8 -40.0 -38.2 -36.4 -34.6 -32.8 -31 -29.2 -27.4 -25.6 -23.8 -22.0 -20.2 -18.4 16.6 -14.8 -13.
13 . Illustrated Parts Catalog.
Illustrated Parts Catalog.
Illustrated Parts Catalog.
Illustrated Parts Catalog.
Illustrated Parts Catalog.
14. Safety Instructions on Service ●Unplug the refrigerator before making any repair or any replacement. � Avoid the electric shock. ●Use the rated components on the replacement. � Check the correct model number, rated voltage, rated current, operating temperature and so on. ●On repair, be sure that the wires such as harness are bundled tightly and are not exposed by water. � Bundle wires tightly in order not to be detached by the external force.
272, Oseon-Dong, Gwangsan-Gu, Gwangju-City, Korea, 506-253 TEL : 82-62-950-6193, 6896 FAX : 82-62-950-6829 - This Service Manual is a property of Samsung Electronics Co., Ltd. Any unauthorized use of Manual can be punished under applicable International or domestic law. - © Samsung Electronics Co., Ltd. Refrigerator Division 2005.
