Model: RB1955SW RB1955SH RB1955VQ RB2155SW RB2155SH RB2155BB

Transcription

1 SAMSUNG Home Appiance Service Bottom-Mounted Freezer Mode: RB1955SW RB1955SH RB1955VQ RB2155SW RB2155SH RB2155BB

2 WARNING IMPORTANT SAFETY NOTICE The service guide is for service men with adequate backgrounds of eectrica, eectronic, and mechanica experience. Any attempt to repair a major appiance may resut in persona injury and property damage. The manufacturer or deaer cannot be responsibe for the interpretation of this information. SAMSUNG ELECTRONICS AMERICA, INC. Technica Service Guide Copyright c2004 A rights reserved. This service guide may not be reproduced in whoe or in part in any form without written permission from the SAMSUNG ELECTRONICS Company. 2

3 Contents 1. Instaation 4 2. Nomencature 4 3. Product Specifications 5 4. Eectrica part specifications & standard 5 5. Warranty information 7 6. Interior Views and Dimensions 8 7. Refrigeration Cyce and Coo Air Circuation Route Mechanica Disassemby Operation Function Circuit Descriptions Diagnostics Iustrated Parts Cataog Safety instruction on services 56 Appendix Ⅰ(Reference for circuit diagnostics) 57 Appendix Ⅱ(Circuit diagram) 61 3

4 1. INSTALLATION 1) To protect refrigerator in movement Use padded hand truck from side ony. 2) Remove a protective tape and pad from the refrigerators. Connect power cord. Adjust the cearance between the doors. 3) Temperature contros ard preset in the factory for recommended settings. The refrigerator shoud runs smoothy and ower the temperature graduay. 4) Once the refrigerator temperature is sufficienty ow It is recommended to store foods in the refrigerator. It takes a few hours to reach the preset temperatures. 2. NOMENCLATURE 2004 Modes R B SW / XAA Buyer code COLOR ; SW-SNOW WHITE VQ-BISQUE GLOSSY SH-STAINLESS PLATINUM BB-BLACK OPTION ; 55-NO DISPENSER 77-DISPENSER Capacity ; CU. FT B - BOTTOM MOUNTED FREEZER (BMF) Product ; R - REFRIGERATOR Labe Location 4

5 3. PRODUCT SPECIFICATIONS Mode Type Temperature contro Tota Net Capacity Freezer (ft 3 ) Refrigerator Net dimension (W X D X H) RB1955SW/SH/VQ RB2155SW/SH/BB BMF 2 Door Eectronic contro X 28.3 X X 30.3 X 69.9 Foam Liner Cabinet insuation Door insuation Cabinet Door Net weight(ib) CYCLO-PENTANE CYCLO-PENTANE A.B.S A.B.S ELECTRICAL PART SPECIFICATIONS & STANDARD ITEM Mode Rated Votage Frequency Mode Starting type Compressor Refrigerant Oi Charge Freezer Evaporator Refrigerator Condenser Dryer Capiary tube Earth screw Door switch STANDARD RB1955SW/SH/VQ RB2155SW/SH/BB 115V 60HZ MK172C-L2U RSCR R134a Freo α-10c(ester), 265cc Spit Fin & Tube Type Spit Fin & Tube Type Forced & Natura Convection Type Moecuar Sieve XH-9 ID0.82 X L3000 BSBN(Brass screw) AC125V 1.4A(SSD-6D) 5

6 ELECTRICAL PART SPECIFICATIONS & STANDARD Temperature Eectrica parts Freezer Refrigerator Defrosting Sensor Heater Fuse Capacitor Over-Load Protector STARTING- RELAY MOTOR-FAN LAMP ITEM RUNNING MODEL TEMP. ON TEMP. OFF MODEL OPERATION FRE. REF. CIRCUIT FRE(INCANDESCENT) REF(INCANDESCENT) Type F-Sensor Type R-Sensor Temperature Seection Temperature Seection First Defrost Cyce (Concurrent Defrost of F and R) Defrost Cyce(FRE) Defrost Cyce(REF) Pause Time Freezer-Sensor Refrigerator-Sensor FRE Evap-Sensor REF Evap-Sensor Ambient TEMP-Sensor Defrost Heater(FRE) Drain Heater(FRE) Defrost Heater(REF) Drain Heater(REF) Therma-Fuse for preventing overheating of Freezer Defrost-Heater Therma-Fuse for preventing overheating of Freezer Defrost-Heater ON( ) ON( ) RSCR 250VAC, 12μF 4TM437RHBYY ±5 69±9 J531Q33E100M ±20% IS3210-SNP6D IS3208-SNP6H IS3208-SCH6A 110V-130V/15W 110V-130/30W STANDARD 4hr ±10min Min. 12hrs, Max. 22Hrs Min. 6hrs, Max. 11Hrs 10±2min OFF( ) OFF( ) THERMISTOR (502AT), SPEC:5.0KΩ AT W 52W 120W 38W AC250V 10A 77±5 C 6

7 5. WARRANTY INFORMATION 7

8 6. Interior Views and Dimensions 6-1) Sheves and Bins Dei drawer Pu it out to disassembe. Door Bin Push it up and side it out to disassembe. Light Gass Shef Pu it out unti its stop Tit down and side it out. Gaon Bin Vegetabe Drawer Ice trays Freezer Drawer 8

9 Interior Views and Dimensions 6-2) Dimensions of Refrigerator (Inches) MODEL RB1955 RB2155 A B C

10 7. Refrigeration Cyce and Coo Air Circuation Route 7-1) Refrigerant Route in Refrigeration cyce Compressor Sub condenser Custer pipe Hot pipe Dryer Capiary tube R-Evaporator F-Evaporator Accumuator Suction pipe Compressor 10

11 Refrigeration Cyce and Coo Air Circuation Route 7-2) Coo Air Circuation 11

12 8. Mechanica Disassemby Refrigerator Disassemby Contro Pane 13 Refrigerator Light 14 Freezer Light 14 Evaporator Cover in the Refrigerator 15 Evaporator Cover in the Freezer 16 Evaporator in the Freezer 17 Evaporator in the Refrigerator 17 Machine Compartment & Eectric Box 18 12

13 Mechanica Disassemby Contro Pane 1. Remove the screws. 2. Pu out the contro pane. 3. Disconnect the wire connector. 13

14 Mechanica Disassemby Warning Aways unpug the power cord before repacing the refrigerator amp. There is the danger of eectric shock. Refrigerator Light 1. Remove the screw. Freezer Light 1. Remove the cover by pressing the bottom tab. 2. Remove the amp cover by unocking the tabs and puing the cover down. 2. Repace the ightbub by turning it counter-cock wise. 3. Repace the ightbub by turning it countercockwise. 3. Reattach the cover and check the amp by pressing door switch. 4. After repacing the bub, reattach the cover and the screw it again. 5. Pug the power cord in and check the amp by pressing the R-door switch. 14

15 Mechanica Disassemby Evaporator Cover in the Refrigerator 1. Remove a sheves and drawers from the refrigerator. 6. Disconnect the wire connector. 2. Pu out the screw caps with a sma fat-bade screwdriver. 3. Remove 6 Phips screws from the cover. Ductwork of the evaporator fan assemby. 4. Unock the 2 tabs with a fat-bade screwdriver on each side of the bottom cover. 5. Remove the evaporator cover by puing out from the bottom of the evaporator cover. 15

16 Mechanica Disassemby Evaporator Cover in Freezer 1. Remove a drawers from the freezer. 5. Disconnect wire connector from the top-eft corner. 2. Remove screws (2) from the support rai. 6. Remove 2 screws from the rear cover of the freezer evaporator and unock the tabs to remove it. 2 screws 3. Pu down the hoder of the support rai and disconnect the wire connector to remove it Unock the tabs around the evaporator cover from the buttom

17 Mechanica Disassemby Evaporator in Refrigerator Evaporator is ocated in the bottom of refrigerator. 1. Take off the ductwork in refrigerator. 2. Disconnect the wire connector.(heater and Thermistor) 3. Desoder the capiary tube and the suction ine from the evaporator. 4. Remove the evaporator. 5. With a fie, score the capiary tube just upstream of the sodered point. Break off the sodered section to hep prevent soder from pugging the tube during sodering. 6. Pace a new evaporator and braze the suction and capiary tube to evaporator using siver soder. 7. Insta a repacement dryer. 8. Evacuate and recharge the system using reasonabe procedures. Evaporator in Freezer Evaporator is ocated in the bottom of freezer to produce cod air driven across the evaporator cois. 1. Take off the ductwork in Freezer. 2. Disconnect the wire connector (Heater, Bimenta, and Thermistor). 3. Desoder the inet and outet tubes. 4. Remove the evaporator. 5. Take the same steps to sea the system as mentioned earier. Accumuator Therma Fuse Therma Fuse Thermistor Thermistor 17

18 Mechanica Disassemby Machine Compartment & Eectric Box Make sure the power cord is unpugged before repacing any Warning eectric components. 3. Mechine compartment assemby 1. Unpug the power cord. 4. Disassembe the eectric box cover after removing the screws with a Phiips screwdriver. 2. Remove the screws of the compartment cover. Side it up and take out from the refrigerator. 5. Eectric box assemby 18

19 9. Operation Function 9-1) Digita Pane ) Temperature Contro Function ) Power Freeze and Power coo Functions ) Sound Function ) Defrost Function ) Forced Operation Function ) Power faiure compensating Function ) Exhibition Function ) Sef - Diagnostics Function ) Component Load Operation Function ) C-Fan Motor Deay function 25 19

20 Operation Function 9-1) Digita Pane 9-2) Temperature Contro Function When the system power is initay engaged, the defaut set temperature are -2 for the freezer and 38 for the set refrigerator, respectivey. The numbers shown on the digita dispay pane stand for the actua compartments temperatures. When the compartment temperatures go down, so do the numbers on the dispay pane, and finay they reach the set temperatures. Once the system is stabiized, the dispay temperatures are the set temperature. 1) Freezer Temperature Contro. To seect a set temperature, press the Freezer Temp. button. The dispay shows the set temperature from - 14 to 8 in sequence. 2) Refrigerator Temperature Contro. To seect a set temperature, press the Refrigerator Temp. button. The dispay shown the set temperature from 34 to 46 in sequence. 3) Chid Lock Button When these two buttons are pressed at the same time for 3 sec., the Power Freeze, Power Coo, Freeze Temp, Refrigerator Temp, are ocked and can not be modified. If you press the two buttons at the same time again for 3 sec., the chid ock function is canceed. note) Because of the temperature sensor sensivity, the refrigerator can be under and/or over cooed when the air fow is bocked by stored foods. (Temperature range of the sensor : ) In the event of a power faiure, if the freezer temperature is maintained ower than 41, the ast 9-3) Power Freeze Function and Power Coo Functions. Seect the Power Freeze or Power Coo buttons separatey. These buttons are togged ON and OFF and the indicators as we. Athough you seect Power Freeze or Power Coo, the set temperatures in the freezer and refrigerator are not changed. The set temperatures for the compartments can be changed whie these functions are in use. 1) Power Freeze function 1-1) When you press the Power Freeze button, the LED indicator ights right away, but there is 10 seconds ag time to an actua operation. When this button is pressed again, the Power Freeze function stops and the indicator is off immediatey. 1-2) If you seect Power Freeze, both the compressor and the freezer fan run for 2 ½ hours continuousy. 1-3) During Power Freeze, the freezer retains the current settings. 1-4) When Power Freeze expires, the indicator goes off and the freezer set temperature wi be restored. 2) Power Coo function 2-1) Power Coo operation and the indicator work exacty same as the Power Freeze function. 2-2) When Power Coo is seected, COMP and R-FAN operate continuosy unti the refrigerator reaches 25. This function wi be terminated after 2 ½ hr running. 20

21 Operation Function 3) When you seect Power Freeze and Power Coo together Each function works at the same time. The COMP and F-FAN run continuousy and the R-FAN runs unti 25 in the refrigerator. 4) Initia Power-On 4-1) When the freezer and the refrigerator temperatures are higher than 14 and 50, respectivey, if Power Freeze is seected, then the R-FAN wi be off. If Power Coo is seected, then the F-FAN wi be off. 4-2) When both functions are seected, there is no benefit of fast cooing for each compartment. 9-4) 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 simutaneousy or if a wrong button is pressed, there is no sound. 2) Door Open Aarm 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 additiona 10 beeps interva wi change to 1 minute. 2-3) The beeps wi cease immediatey when the doors are cosed. 9-5) Defrost Function 1) A defrost is determined based on the accumuated compressor on-time. 2) When the power is engaged for the first time, the defrost cyce for the freezer and the refrigerator wi begin after 4 hours of the accumuated compressor on-time. 3) A defrost interva depends on the ambient temperature, the number of door openings, and the door open time. 4) The defrost cyce is composed of a pre-coo process (F-Fan and COMP) for 30 minutes, a heating process, and a resting for 8-12 minutes to drain. 5) A minimum interva is 6 hours and a maximum is 11 hours for the refrigerator, and 12 hours and 22 hours for the freezer, respectivey. 6) When the system runs ony for the refrigerator (R-Fan and COMP) and if the refrigerator can not reach the set. 21

22 Operation Function 9-6) Forced Operation function (Power coo key + Refrigerator. Temp 8sec.) This function enabes a pu-down mode, a defrost mode for the refrigerator ony, a defrost mode rigerator at the same time, and a canceation of this function. Press Power Coo and Refrigerator Temp. buttons for 8 seconds simutameousy to get in the ready mode for a forced operation. The dispay pane wi return to norma after 15 seconds in the ready mode. At the ready mode, press any button once to start a pu-down operation, twice for a defrost cyce for the refrigerator, three times for a defrost cyce for the freezer and the refrigerator, and finay four times for canceation of this function. Another way to cance this function is to simpy pug out and in the power cord. 1) Pu-down Operation 1-1) At the ready mode, press any button once then the buzzer wi beep (ON for 1/2 second and OFF for 1/2 second) unti this mode is canceed. 1-2) At this pu-down mode, the compressor wi start immediatey (No 5 minute deay) and if the system is in the defrost cyce, it wi be canceed right away. note) If this pu-down mode begins right after the compressor was off, the compressor may not start to run due to an overoad condition. 1-3) At this mode, the compressor and freezer fan wi operate continuousy for 24 hours and the refrigerator fan wi be on and off according to the set temperature(34 ) 1-4) After 24 hour operation, the system wi be cyced at -14 for the freezer and 34 for the refrigerator. 1-5) In order to cance this mode at any time, seect the next mode on the ready mode or power off the system. 2) Defrost operation 2-1) At the pu-down mode, press any button again on the ready mode to begin the defrost cyce for the refrigerator. 2-2) The beep sound continues for 3 second at the beginning, then ON for 3/4 seconds and OFF for 1/4 second unti this mode cease. 2-3) After this operation, the system wi come back to norma operation. 2-4) At this mode, press any button again on the ready mode to operate the defrost cyces for both compartments. 2-5) The beep sound continues for 3 seconds at that time, then ON for 1/4 second and OFF for 3/4 seconds unti the defrost operation cease. 3) Canceation 3-1) At the R,F-Defrost mode, press ant button again on the ready mode to return to a norma operation. 3-2) Simpy unpug the power cord, then pug it again to return to a norma operation. 22

23 Operation Function 9-7) Power faiure compensating function 1) When the freezer temperature is ower than 50, a functions on the dispay pane wi be restored. 2) When the freezer temperature is higher than 50, a functions wi be initiaized. (2 for the freezer, 38 for the refrigerator, and Cubed for the Ice Type) 9-8) Exhibition Function This function is for a dispay purpose on the foor of show room or store. 1) Mode ON/OFF 1-1) For the exhibition mode, press Power Freeze and Freezer Temp. buttons simutaneousy for 5 seconds unti a ding-dong sounds. 1-2) Press the same time buttons again for 5 seconds to cance this mode put with a ding-dong sound. 2) Operation 2-1) Most of the system function except the compressor operation are working propery. 2-2) There is no defrost cyce in this mode. 9-9) Sef-Diagnostics function 1) Sef-Diagnostics in the initia Power ON 1-1)The contro board performs a sef diagnostics test within 1 second and check out the temperature sensors abiities. 1-2) If a sensor faiure occurs, a corresponding LED segment wi bink. 1-3) When a LED segment binks, ony the canceation function (Press Power Freeze and Power Coo buttons simutaneousy for 8 seconds) is acceptabe. 1-4) After a repacement of bad sensor or a canceation of this function, this sef diagnostics wi end. 2) Sef-Diagnostics in the norma operation 2-1) To seect this function, press Power Freeze and Power Coo buttons simutaneousy for 5 seconds with an audibe tone. 2-2) In the sef diagnostic mode, ony corresponding LED segments wi be iuminated (see the check ist on) 2-3) After a 30 second iumination of error signa, the system wi return to the norma operation. 23

24 Operation Function Tabe 1. Dispay tabe of sef diagnosis. No Item LED Dispay Detais Remarks 1 R-sensor REFRIGERATOR Connector contact faiure Short-circuit Suspected to be beow -58 Suspected to be over R-defroster sensor REFRIGERATOR Connector contact faiure Short-circuit Suspected to be beow -58 Suspected to be over Outer sensor FREEZER Connector contact faiure Short-circuit Suspected to be beow -58 Suspected to be over F-sensor FREEZER Connector contact faiure Short-circuit Suspected to be beow -58 Suspected to be over F-defroster sensor FREEZER Connector contact faiure Short-circuit Suspected to be beow -58 Suspected to be over ) Component Load Operation Function 1) In the norma operation, press Power Freeze and Power Coo buttons simutaneousy for 3 second, then the dispay pane wi bink for 2 seconds. 2) Press Refrigerator Temp. button to get into this check mode with an audibe tone. 3) Each iuminating LED segment stands for the component which has an ouput signa from the contro board. 4) This mode wi terminate automaticay after 30 seconds. 24

25 Operation Function Tabe 2. Dispay tabe of the presenty operating parts. FREEZER:10digit FREEZER: 1digit REFRIGERATOR:10digit REFRIGERATOR: 1digit No Content R-fan R-defrost heater Initia start mode Over oad mode Low temp.mode Exhibition mode Comp F-fan F-defrost heater F-Lamp R-Lamp Dispay LED a : REFRIGERATOR 1 digit c : REFRIGERATOR 1 digit d : REFRIGERATOR 1 digit e : REFRIGERATOR 1 digit f : REFRIGERATOR 1 digit g : REFRIGERATOR 1 digit a : FREEZER 1 digit b : FREEZER 1 digit d : FREEZER 1 digit a : FREEZER 10 digit b : FREEZER 10 digit Operation Incude R-fan activation Defrost heater activation Initia power is activated ON Outer temperature is over 95 Outer temperature is beow 68 Exhibition mode is operated together Led ON when COMP activation is incuded Led ON F-fan activation is incuded Led ON when F-heater activation is incuded Led ON when F-amp activation is incuded Led ON when R-amp activation is incuded Remark Ref. 6.button scan and dispay circuitry 3, 4, and 5 ony expains the system operation states according to the ambient condition. 9-11) C-Fan Motor Deay Function of the Machine Compartment According to the ambient temperature, the condenser fan ocated in the machine compartment is operated with different modes. C-FAN Deay function Ranges of ambient temp. Above ~ 65 Beow 60 Operation C-FAN is ON as soon as the compressor is on. C-FAN is ON with 5 minutes deay from the compressor on. C-FAN is OFF regardess of the compressor operation. 25

26 10. Circuit Descriptions 10-1) Source Power Circuit ) Osciator Circuit ) Reset Circuit ) Door S/W Sensing Circuit ) Temperature Sensing Circuit ) Key Scan and Dispay Circuit ) Load Drive Circuit ) Option Circuit 32 26

27 Circuit Descriptions 10-1) Source Power Circuit Votage (DC 12V) Vcc (DC 5V) Circuit used Reay Operation & LED Dispay Power around MICOM & Sensor Detector 1) The input AC votage drops to AC 8 vots on the transformer secondary side between 1~3 at CN 10. The rectified votage passed through D101 ~ 104 becomes DC 5V through votage reguator MC7805(REG1). This (DC5V) is suppied to the contro board and sensor s circuits. 2) The input AC Votage drops to AC 15 vots on the transformer secondary side between 5~7 at CN 10. The rectified votage passed through D105 ~ D108 becomes DC 12V through votage reguator MC7812CT (REG2). This (DC12V) is suppied to the reay operation and LED dispay. 10-2) Osciator circuit Port Xin(#19) Xout(#20) Osciating Frequency 4.00MHz 4.00MHz ±0.5% Error It is designed for cock generation and time cacuation for synchronizing transmission and reception on the ogic eements inside the MICOM. If the X-TAL specification changes, MICOM may make an error. (The standard components shoud be used.) 27

28 Circuit Descriptions 10-3)Reset Circuit Port Vcc Reset Votage DC 5V DC 5V When the power is suppied to MICOM, the reset circuit initiaizes RAM and other sectors of MICOM. A reset votage maintains ow for hundreds of µsec comparing to MICOM Vcc votage when the power is in. It aso maintains high (5V) during norma operation. But, when Vcc drops to 3.4V-3.7V, a reset port becomes ow. 10-4) Door S/W Sensing Circuit DOOR Door Conditions Door S/W Contact MICOM PIN NO Micom Input Votage F CLOSE OPEN OPEN CLOSE # 39 HIGH LOW R CLOSE OPEN OPEN CLOSE # 40 HIGH LOW 1) If a door is open, the door S/W contact is cosed. Then MICOM receives ow signa and detects door open, A reay contro circuit receives HIGH signa and turn Lamp on. 2) If a door is cosed, the door S/W contact is open. Then MICOM receives high signa and detects door cose, A reay contro circuit receives LOW signa and turn Lamp off. 28

29 Circuit Descriptions 10-5) Temperature Sensing Circuit ( Air Sensor) When Sensor is open MICOM input HIGH When sensor is cut off MICOM input LOW 1) The sensor uses the characteristics of thermistor. If temperature goes higher, resistance goes ower. On the contrary, if temperature goes ower, resistance goes higher. 2) A MICOM input votage is cacuated by sensor as foows. RTH (VCC : 5V, RTH : Sensor reisitance) VF = X Vcc RTH + R301 3) For the resistance data corresponding to a temperature and a MICOM input votage, pease refer the conversion tabe on the back. 29

30 Circuit Descriptions 10-6) Key Scan and Dispay Circuit If the IC04 decorder(kid65783ad) receives signas from MLCOM pins(34-6), an output signa per 2 miiseconds comes out from Grid#1-#7. A step DC12 vot peak wi be generated periodicay as foows: 30

31 Circuit Descriptions 10-7) Load Drive Circuit 1) Most of reays can contro the compressor, heaters and severa option functions. 2) For the compressor, #12 pin of MICOM signas HIGH(5V). This signa enters to #2 of IC03 and #15 of output termina wi be on and grounded. When the rey RY71 is switched to NO termina a 115V power is suppied to the compressor. If MICOM outputs LOW(0V), the compressor wi stop. 3) If the RY71 is connected to NC, RY72 and 73 for defrost heaters wi be on and corresponding heater. COMP RELAY Defrost Heater Load Remark on off Comp Operation Defrost-Heater Power Off on on Comp off, Defrost-Heater Off off on Defrost-Heater On Comp Power Off off off Comp Off, Defrost-Heater Off Wi be activated according to the signa from MICOM. Like the above bock diagram, operation of F, R defrost heater is determined by the operation of the reay for COMP. 31

32 Circuit Descriptions 10-8) Option Circuit Temperature and function vaues can be abjustabe by using main PCB switching diode. Note : the vaues have been preset in factory. If is recommended not to change the vaue arbitrariy. When the option function is modified, a power shoud be turned off and on, again. 1) Freezer Temperature Shift (Unit F) 2) Refrigerator Temperature Shift (Unit F) SHIFT D601 D602 D603 SHIFT D604 D605 D606 Reference Reference

33 Circuit Descriptions 33

34 11. Diagnostics 11-1) If power is not ON Caution! At the power of main PCB, the 115V power and a highvotage over DC 170V occur. Specia care shoud be advised on repair and measurement. To check the main PCB, pease appy descriptions of operation and references in the manua. 34

35 Diagnostics 11-2) If there is a troube with sef-diagnosis 1) If the ambient sensor has troube. 2) If the temperature sensor of the refrigerator has troube. 35

36 Diagnostics 3) If the defrost sensor of the refrigerator has troube. 4) If the temperature sensor of the freezer has troube. 36

37 Diagnostics 5) If the defrost sensor of the freezer has troube. 37

38 Diagnostics 11-3) If the compressor is not working propery Pre-check 1. A compressor does not operate within 5 minutes after compressor is OFF. 2. A compressor does not run during defrost period 3. A compressor does not run because a ow temperature is detected if freezer and the refrigerator sensor are not connected. 38

39 Diagnostics 11-4) If cooing fan doesn t work Pre-check Seect a pu-down mode from the forced operation function 1. When COMP is OFF both freezer and the refrigerator cooing fans and COMP cooing fan remain OFF. 2. When COMP is ON, the refrigerator fan is not aways ON and when the refrigerator temperature reached a set temperature, the fan goes OFF. 3. When both the freezer and the refrigerator doors are cosed, each fan has a deay time (5sec ~ 1 min) and then degins to run. (COMP ON condition) 4-1) When freezer fan (F-fan) do not operate 39

40 Diagnostics 11-5) If the refrigerator fan doesn t work 40

41 Diagnostics 11-6) If the compressor cooing fan motor doesn t work 41

42 Diagnostics 11-7) No defrosting Pre-check 1. Athough both F R-defrost sensors have short-circuit, a norma operation continues without a defrost cyce (Refer to sef - diagnostics function) 2. When the temperature fuse is open, there is no heating and a defrost occurs naturay by the compartment temperature increase and eventuay, it wi cause a binking of temperature. 3. When both F R-defrost sensors are open, heating does not end. The compressor remains off and a temperature fuse wi be open. (Refer to sef-diagnostics function.) 42

43 Diagnostics 43

44 Diagnostics 11-8) Aarm continuousy Pre-check 1. Aarm begins after 2 minutes when the door is open and runs in every 2 minutes. 2. If the door is not cosed propery, MICOM wi indicate that the door is open, and aarm continues. If the aam goes for 10 minutes, the ight in the compartment wi be off and not be on in the situation that the door opens. 1) If meody sounds continuousy 44

45 Diagnostics 2) If beep sounds continuousy 3) When the digita pane PCB does not ight 45

46 Diagnostics 4) When a button of the digita pane is not seected 46

47 Diagnostics Pre-check 1. Is the power cord connected to a wa outet correcty? 2. Be carefu of high-votage, high-frequency discharge from the eectronic baast. 5) If the amp of refrigerator fais to ight 47

48 12. Iustrated Parts Cataog. 12-1) Freezer 48

49 Iustrated Parts Cataog. Parts List of Freezer NO CODE-NO DA N DA A DA A DA B DA A DA A DA B DA A DA A DA B DA A DA A DA A DA B DA B DA A DA F DA E DA C DA E DA F DA B DA C DA A DA A DA A DA C DA S DA D DA A DA B DA A DA V DA A DA D PART NAME TRAY-ICE,ASSY TRAY ICE TRAY-FRE UPP,ASSY TRAY-FRE UPP,ASSY COVER-TRAY FREE, UPP TRAY-FRE MID,ASSY TRAY-FRE MID,ASSY COVER-TRAY FREE, MID TRAY-FRE LOW,ASSY TRAY-FRE LOW,ASSY COVER-TRAY FREE, LOW ROLLER FRE FIXER ROLLER TRAY ICE CUBE TRAY ICE CUBE COVER EVAP FR(FRE),ASSY EVAP-FRE ASSY ASS Y-FUSE THERMO(77 C) SENSOR ASSY ASSY SUPT-FREE ASSY SUPT-FREE SUPPORT-FREE,L SUPPORT-FREE,R GROMMET RAIL COVER-LAMP,FRE COVER-LAMP,FRE LAMP HOLDER SENSOR ASSY LAMP-INCANDESCENT COVER-EVAP RE(FRE),ASSY COVER-EVAP REAR CASE-MOTOR FAN-PROPELLER MOTOR-FAN GROMMET-FAN MOTOR DRAIN PLATE FRE ASSY RB1955 OPTION RB2155 SPEC 115V/242W EVAP FRE.250V EVAP FRE 110~130V 110~130V ASSY SUPT-FREE ASSY SUPT FREE 110~130V / 15W 115V 115V,60HZ 115V/52W 49

50 Iustrated Parts Cataog. 12-2) Refrigerator 50

51 Iustrated Parts Cataog. Parts List of Refrigerator NO CODE-NO DA A DA B DA A DA A DA A DA A DA A DA A DA A DA B DA A DA A DA L DA M DA A DA B DA C DA D DA A DA A DA J DA K DA A DA A DA A DA A DA A DA D DA A DA E DA C DA C DA D DA F DA A DA A DA B DA A DA B DA C DA A DA N DA A DA T DA A DA A DA B PART NAME CASE-VEG,ASSY CASE-VEG,ASSY COVER-VEG KNOB-HUMIDITY ROLLER FRE FIXER ROLLER RAIL-VEG, MID RAIL-VEG, MID COVER-VEG ASSY COVER-VEG ASSY TRIM-COVER,VEG TRIM-COVER,VEG SHELF GLASS SHELF GLASS SHELF REF-MID,ASSY SHELF REF-MID,ASSY SHELF REF-UPP,ASSY SHELF REF-UPP,ASSY TRIM-SHELF REF TRIM-SHELF REF SHELF GLASS SHELF GLASS RAIL-CHILLED,L RAIL-CHILLED,L RAIL-CHILLED,R RAIL-CHILLED,R TRAY CHIL ROOM-ASSY TRAY CHIL ROOM-ASSY COVER-LAMP REF TRAY-UTILTY LAMP-INCANDESCENT EVAP-REF ASSY SENSOR ASSY ASSY-FUSE THERMO(R)(77 C) COVER-EVAP REF ASSY COVER-EVAP FR REF COVER-EVAP RE REF COVER-MOTOR FAN-CIRCUIT COVER-SENSOR REF TRIM-COVER SENSOR SPACER-DUCT MOTOR-FAN GROMMET-MOTOR SENSOR ASSY SEAL-COVER EVAP RE SEAL AIR SIDE PLATE-DRAIN REF ASSY 51 RB1955 OPTION RB2155 SPEC COVER VEG COVER VEG SHELF(MID/UPP) SHELF(MID/UPP) SHELF(MID/UPP) SHELF(MID/UPP) SHELF-UPP SHELF-UPP SHELF-UPP SHELF-UPP 130V, 30W 115V, 120W EVAP-REF EVAP-REF, 250V 115~127V, 60Hz 220V~240/50Hz 115V COVER EVAP 115V/38W

52 Iustrated Parts Cataog. 12-3) Disassemby of Door 52

53 Iustrated Parts Cataog. Parts List of Freezer Door CODE-NO PART NAME OPTION RB1955SW/2155SW RB1955VQ RB2155BB RB1955SH/2155SH SPEC DA C DA D DA E DA F DA A DA C DA P DA Q DA R DA C DA D DA E DA F DA A DA B DA B DA A DA A DA B DA A DA A DA A DA A DA G DA H DA J DA E DA C DA C DA X DA Y DA Z DA W DA F DA J DA K DA L DA A DA A DA A DA A DA A ASSY FOAM-DOOR REF ASSY FOAM-DOOR REF ASSY FOAM-DOOR REF ASSY FOAM-DOOR REF STOPPER DOOR, MID STOPPER DOOR, LOW STOPPER DOOR, LOW STOPPER DOOR, LOW STOPPER DOOR, LOW ASSY FOAM-DOOR FRE ASSY FOAM-DOOR FRE ASSY FOAM-DOOR FRE ASSY FOAM-DOOR FRE GASKET-DOOR SUB FRE GUARD-REF UPP, L GUARD-REF UPP, R GUARD-REF MID GUARD-REF LOW GUIDE-BOTTLE HINGE-UPP ASSY HINGE-UPP SHIM-HINGE UPP CAP HINGE UPP CAP HINGE UPP CAP HINGE UPP CAP HINGE UPP HINGE-MID, ASSY HINGE-MID SHIM-HINGE MID ASSY COVER CONTROL PANEL ASSY COVER CONTROL PANEL ASSY COVER CONTROL PANEL ASSY COVER CONTROL PANEL COVER CONTROL PANEL COVER CONTROL PANEL COVER CONTROL PANEL COVER CONTROL PANEL BUTTON-PCB, L BUTTON-PCB, R GASKET BUTTON PCB, L GASKET BUTTON PCB, R PANEL PCB SNOW WHITE BISQUE BLACK STAINLESS PLATINUM SNOW WHITE BISQUE BLACK STAINLESS PLATINUM SNOW WHITE BISQUE BLACK STAINLESS PLATINUM SNOW WHITE BISQUE BLACK STAINLESS PLATINUM SNOW WHITE BISQUE BLACK STAINLESS PLATINUM SNOW WHITE BISQUE BLACK STAINLESS PLATINUM SILVER SIVLER 53

54 Iustrated Parts Cataog. 12-4) Cabinet 54

55 Iustrated Parts Cataog. Parts List of Cabinet CODE-NO PART NAME OPTION SPEC RB1955SW/2155SW RB1955VQ RB2155BB RB1955SH/2155SH DA D DA B DA F DA R DA S DA T DA D DA A DA R DA M DA N DA G DA J DA A DA D DA A DA B DA Q DA B DA B DA G DA A DA N DA B DA D DA L DA B MK172C-L2U DA B DA D DA N DA A DA D DA C DA A DA A DA A DA A HINGE-LOW TRIM-PLATE, ABSORBER COVER-LEG COVER-LEG COVER-LEG COVER-LEG SWITCH DOOR CASE-PCB PANEL CAP-SCREW CAP-SCREW CAP-SCREW CAP-SCREW TRANS POWER C-OIL COVER-PCB PANEL PBA-MAIN GROMMET-DRAIN HOSE, A GROMMET-DRAIN HOSE, B TUBE-PVC COVER-COMP ASSY FAN-ASY MOTOR-CIRCUIT PIPE-CONNECT TRAY-DRAIN WATER ASSY GROMMET-SUCT PIPE, A GROMMET-SUCT PIPE, B PIPE-SUB COND ASSY CLAMP-COMP COMPRESSOR DRYER-ASSY PROTECTOR O/L RELAY-PTC COVER RELAY CHASSIS-COMP ASSY CASTER-REAR RIVET-CASTER LEG-ASSY GROMMET COMP SEAL-SUB COND SNOW WHITE BISQUE BLACK STAINLESS PLATINUM SNOW WHITE BISQUE BLACK STAINLESS PLATINUM 115V 250V, 12uF 115V REF( 10) FRE 115V/60Hz 115V PIPE-SUB COMA PIPE-SUCT R134a 4TM437RHBYY-53 J531Q33E100M

56 13. Safety Instructions on Service Unpug the refrigerator before making any repair or any repacement. Avoid the eectric shock. Use the rated components on the repacement. Check the correct mode number, rated votage, rated current, operating temperature and so on. On repair, be sure that the wires such as harness are bunded tighty and are not exposed by water. Bunde wires tighty in order not to be detached by the externa force. On repair, remove competey dust, partices or other things on housing parts, harness parts, and connectors. Ceaning may prevent fire by tracking or short. Check if there is any trace indicating the infitration of water on eectrica parts. If there is a trace, change the reated components or do the necessary action such as taping using the insuating tape. After repair, check the assembed state of parts. It must be the same assembed state as before. Check the surrounding conditions of the instaed refrigerator. When the refrigerator is ocated at humid or wet pace, or the instaed state is unstabe, change the ocation. If needed, do the ground. Especiay, if there is a possibiity of the eectric eakage, this appiance must be propery grounded. Do not aow consumers to use one outet for severa pugs. Check if the power cord is paced under other appiance and so was damaged, worm-out and squeezed. Repair defective power pug or outet immediatey. Make sure that the power cord is not paced under other appiance or squeezed. Do not aow consumers to keep bottes or the ikes in the Freezer or to keep foods in unstabe position. Do not aow consumers to repair the appiance by themseves. Do not aow consumers to keep other chemicas except food. Medicines and other materias for research ; This appiance wi not maintain the precisey constant temperature for them. Voatie materia(acoho, Benzene, Ether, LP gas etc.) : possibiity of exposion 56

57 Appendix Ⅰ(Reference for circuit diagnostics) Ref.1) Wire connector on the cabinet door. Ref. 2) How to check reay faiure * Disconnect the wire connector from the main PCB CN70, 71 and measure the foowing items. 1. Measure the coi bisection of the reay and check whether it works. 2. Measure the apex bisection for open circuit. Category 3-contact termina Reay 2-contact termina Reay Votage of coi termina DC 12V(Operation) DC 0V(Standsti) DC 12V(Operation) DC 0V(Standsti) Judge C-NO:SHORT C-NC:OPEN C-NO:OPEN C-NO:SHORT SHORT OPEN Note) C Common, NO Norma open, NC Norma cose 3. When it operates as above, it is norma and when it does not operate, repair the corresponding reay. 57

58 Ref. 3) Check a oad * Unpug the power cord and disconnect the connector from the main PCB CN70, 71 and measure the foowing: 1. Measure resistance between the terminas and check for mafunctioning of a oad and wire connection. Subordinate R Defrost heater F Defrost heater Comp Comp-circuation fan R-Circuation fan F-Circuation fan R-Lamp F-Lamp Measurement termina CN CN CN CN CN CN CN CN Evauation of measurement resut Ref. 4) Check sensors * Disconnect the connector from the main PCB CN30. * Resistance wi be owered whie the temperature rises due to a NTC type sensor. 1. R sensor measures resistance of CN30 between 2~5. 2. Freezer sensor measures resistance of CN30 between 1~5. 3. R-defrost sensor measures resistance of CN30 between 4~5. 4. F-defrost sensor measures resistance CN30 between 3~5. 5. The measured vaue above is compared to the sensor specification and the temperature tabe in speciication found in the manua. 58

59 Ref. 5) Check Door S/W (Micom signa) 1. Check if CN30 6 and 8 is 5V DC after cosing the F R doors. 2. Check if CN30 6 is 0V DC when opening F door. Check if CN30 8 is 0V DC when opening R door. 3. If there is probem, check door S/W and wire connection. Ref. 6) Forced Operation and Forced Defrosting (Refrigerator Bub) 1. Open the door and check if the freezer amp turns on. 2. Press the Door S/W and check if the freezer amp turns off. 3. Cose the freezer door and repeat 1 and 2 for refrigerator door. 4. If there is a probem, check ightbub and door S/W. 5. Check wire connection. (Forced running) * This function is used to turn on the comp and fan immediatey regardess of the temperature of freezer using the test button on the main PCB. 1. Press the TEST button on the PCB after removing the main PCB cover in the machine compartment. 2. Buzzer wi sound to indicate the forced running. (Forced defrosting) * This function is used to turn on the defrosting regardess of defrost time. PCB-MAIN ASSY 1. Press the button during forced running. Then, R-defrosting is performed. 2. If the button is press during R-defrosting, F- defrosting is aso performed at the same time. 3. If the button is pressed during R-F defrosting, test mode is reeased. 59

60 Ref. 7) Tabe of temperature sensor according to resistance and votage conversion. Sensor Short : Micom 0V. Sensor Open : Micom 5V. * Votage conversion tabe depends on H/W structure of MICOM port input votage. Sensor partia pressure resistance 10KΩ Temp.( ) Resistance(Ω) Votage(V) Temp.( ) Resistance(Ω) Votage(V) Temp.( ) Resistance(Ω) Votage(V)

61 11. PCB Circuit Diagram 61

62 272, Oseon-Dong, Kwangsan-Gu, Kwangju-City, Korea, TEL : , 6896 FAX : This Service Manua is a property of Samsung Eectronics Co., Ltd. Any unauthorized use of Manua can be punished under appicabe Internationa and/or domestic aw. - Samsung Eectronics Co., Ltd. Refrigerator Division Printed in Korea