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Diagnostics

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 low temperature is detected if freezer and the

refrigerator sensor are not connected.

Pre-check

11-3) If the compressor is not working properly

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Содержание RB1955SWRB1955SH

Страница 1: ...RB1955SW RB1955SH RB1955VQ RB2155SW RB2155SH RB2155BB Model Bottom Mounted Freezer SAMSUNG Home Appliance Service ...

Страница 2: ...e 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 ⓒ2004 All rights reserved This service guide may not be reproduced in whole or in part in any form without written permission from the SAMSUNG ELECTRONICS Company WARNING ...

Страница 3: ... 7 6 Interior Views and Dimensions 8 7 Refrigeration Cycle and Cool Air Circulation Route 10 8 Mechanical Disassembly 12 9 Operation Function 19 10 Circuit Descriptions 26 11 Diagnostics 34 12 Illustrated Parts Catalog 48 13 Safety instruction on services 56 Appendix Ⅰ Ⅰ Reference for circuit diagnostics 57 Appendix Ⅱ Ⅱ Circuit diagram 61 ...

Страница 4: ...commended settings The refrigerator should runs smoothly and lower the temperature gradually 4 Once the refrigerator temperature is sufficiently low It is recommended to store foods in the refrigerator It takes a few hours to reach the preset temperatures 2004 Models R B 19 55 SW XAA Product R REFRIGERATOR Capacity CU FT B BOTTOM MOUNTED FREEZER BMF OPTION 55 NO DISPENSER 77 DISPENSER COLOR SW SNO...

Страница 5: ...r switch Model Starting type Refrigerant Oil Charge Freezer Refrigerator Evaporator Compressor RB1955SW SH VQ RB2155SW SH BB BMF 2 Door Electronic control CYCLO PENTANE CYCLO PENTANE A B S A B S 227 241 32 3 X 28 3 X 69 9 32 3 X 30 3 X 69 9 Model Type Temperature control Total Freezer Refrigerator Net Capacity ft 3 Cabinet insulation Door insulation Cabinet Door Liner Foam Net weight Ib Net dimens...

Страница 6: ...se First Defrost Cycle Concurrent Defrost of F and R Defrost Cycle FRE Defrost Cycle 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 Temperature Electrical parts 242W 52W 120W 38W AC250V 10A 77 5 C Thermal Fuse for preventing overheating of Freezer Defrost Heater Thermal Fu...

Страница 7: ...5 WARRANTY INFORMATION 7 ...

Страница 8: ...semble Door Bin Push it up and slide it out to disassemble Glass Shelf Pull it out until its stop Tilt down and slide it out Ice trays Vegetable Drawer Gallon Bin Light Freezer Drawer 6 Interior Views and Dimensions 6 1 Shelves and Bins ...

Страница 9: ...9 Interior Views and Dimensions MODEL RB1955 RB2155 A 24 3 26 3 B 28 3 30 3 C 57 8 59 8 6 2 Dimensions of Refrigerator Inches ...

Страница 10: ...tion Cycle and Cool Air Circulation Route Compressor Sub condenser Cluster pipe Hot pipe Dryer Capillary tube R Evaporator F Evaporator Accumulator Suction pipe Compressor 7 1 Refrigerant Route in Refrigeration cycle ...

Страница 11: ...11 Refrigeration Cycle and Cool Air Circulation Route 7 2 Cool Air Circulation ...

Страница 12: ... Disassembly Control Panel 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 Electric Box 18 ...

Страница 13: ...13 Mechanical Disassembly 1 Remove the screws 2 Pull out the control panel 3 Disconnect the wire connector Control Panel ...

Страница 14: ...cover and the screw it again 5 Plug the power cord in and check the lamp by pressing the R door switch Always unplug the power cord before replacing the refrigerator lamp There is the danger of electric shock 1 Remove the cover by pressing the bottom tab 2 Replace the lightbulb by turning it counter clock wise 3 Reattach the cover and check the lamp by pressing door switch Warning Refrigerator Lig...

Страница 15: ...e screwdriver 3 Remove 6 Phillps screws from the cover 4 Unlock the 2 tabs with a flat blade screwdriver on each side of the bottom cover 5 Remove the evaporator cover by pulling out from the bottom of the evaporator cover Evaporator Cover in the Refrigerator 6 Disconnect the wire connector Ductwork of the evaporator fan assembly ...

Страница 16: ...ly 1 Remove all drawers from the freezer 2 Remove screws 2 from the support rail 3 Pull down the holder of the support rail and disconnect the wire connector to remove it 4 Unlock the tabs around the evaporator cover from the buttom 5 Disconnect wire connector from the top left corner 2 screws Evaporator Cover in Freezer ...

Страница 17: ...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 Place a ne...

Страница 18: ...ng any electric components Mechanical Disassembly 2 Remove the screws of the compartment cover Slide it up and take out from the refrigerator 3 Mechine compartment assembly Machine Compartment Electric Box Warning 4 Disassemble the electric box cover after removing the screws with a Phillips screwdriver ...

Страница 19: ...Freeze and Power cool Functions 20 9 4 Sound Function 21 9 5 Defrost Function 21 9 6 Forced Operation Function 22 9 7 Power failure compensating Function 23 9 8 Exhibition Function 23 9 9 Self Diagnostics Function 23 9 10 Component Load Operation Function 24 9 11 C Fan Motor Delay function 25 ...

Страница 20: ...by stored foods Temperature range of the sensor 15 80 In the event of a power failure if the freezer temperature is maintained lower than 41 the last 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 tempe...

Страница 21: ...ctively if Power Freeze is selected then the R FAN will be off If Power Cool is selected then the F FAN will be off 4 2 When both functions are selected there is no benefit of fast cooling for each compartment 9 4 Sound Function 1 A defrost is determined based on the accumulated compressor on time 2 When the power is engaged for the first time the defrost cycle for the freezer and the refrigerator...

Страница 22: ...ote If this pull down mode begins right after the compressor was off the compressor may not start to run due to an overload condition 1 3 At this mode the compressor and freezer fan will operate continuously for 24 hours and the refrigerator fan will be on and off according to the set temperature 34 1 4 After 24 hour operation the system will be cycled at 14 for the freezer and 34 for the refriger...

Страница 23: ... is no defrost cycle in this mode 9 8 Exhibition Function 1 Self Diagnostics in the initial Power ON 1 1 The control board performs a self diagnostics test within 1 second and check out the temperature sensors abilities 1 2 If a sensor failure occurs a corresponding LED segment will blink 1 3 When a LED segment blinks only the cancellation function Press Power Freeze and Power Cool buttons simulta...

Страница 24: ... to be below 58 Suspected to be over 150 Remarks F defroster sensor F sensor Outer sensor R defroster sensor R sensor Item FREEZER FREEZER FREEZER REFRIGERATOR REFRIGERATOR LED Display Table 1 Display table of self diagnosis 1 In the normal operation press Power Freeze and Power Cool buttons simultaneously for 3 second then the display panel will blink for 2 seconds 2 Press Refrigerator Temp butto...

Страница 25: ...EEZER 1digit REFRIGERATOR 10digit REFRIGERATOR 1digit Content 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 Display LED Table 2 Display table of the presently operating parts l According to the ambient temperature th...

Страница 26: ... 1 Source Power Circuit 27 10 2 Oscillator Circuit 27 10 3 Reset Circuit 28 10 4 Door S W Sensing Circuit 28 10 5 Temperature Sensing Circuit 29 10 6 Key Scan and Display Circuit 30 10 7 Load Drive Circuit 31 10 8 Option Circuit 32 ...

Страница 27: ...oltage drops to AC 15 volts on the transformer secondary side between at CN 10 The rectified voltage passed through D105 D108 becomes DC 12V through voltage regulator MC7812CT REG2 This DC12V is supplied to the relay operation and LED display It is designed for clock generation and time calculation for synchronizing transmission and reception on the logic elements inside the MICOM If the X TAL spe...

Страница 28: ... Voltage DC 5V DC 5V 1 If a door is open the door S W contact is closed Then MICOM receives low signal and detects door open A relay control circuit receives HIGH signal and turn Lamp on 2 If a door is closed the door S W contact is open Then MICOM receives high signal and detects door close A relay control circuit receives LOW signal and turn Lamp off DOOR F R Door Conditions CLOSE OPEN CLOSE OPE...

Страница 29: ...ance goes higher 2 A MICOM input voltage is calculated by sensor as follows VCC 5V RTH Sensor reisitance 3 For the resistance data corresponding to a temperature and a MICOM input voltage please refer the conversion table on the back RTH VF X Vcc RTH R301 When Sensor is open MICOM input HIGH When sensor is cut off MICOM input LOW Air Sensor 10 5 Temperature Sensing Circuit ...

Страница 30: ...If the IC04 decorder KID65783AD receives signals from MLCOM pins 34 6 an output signal per 2 miliseconds comes out from Grid 1 7 A step DC12 volt peak will be generated periodically as follows 10 6 Key Scan and Display Circuit ...

Страница 31: ... MICOM outputs LOW 0V the compressor will stop 3 If the RY71 is connected to NC RY72 and 73 for defrost heaters will be on and corresponding heater Will be activated according to the signal from MICOM Like the above block diagram operation of F R defrost heater is determined by the operation of the relay for COMP RELAY Load Comp Operation Comp off Defrost Heater Off Defrost Heater On Comp Off Defr...

Страница 32: ...ft Unit F SHIFT Reference 1 0 2 0 4 0 6 0 2 0 4 0 6 0 D604 D605 D606 Temperature and function values can be abjustable by using main PCB switching diode Note the values have been preset in factory If is recommended not to change the value arbitrarily When the option function is modified a power should be turned off and on again 10 8 Option Circuit ...

Страница 33: ...33 Circuit Descriptions ...

Страница 34: ...ot ON At the power of main PCB the 115V power and a high voltage over DC 170V occur Special care should be advised on repair and measurement To check the main PCB please apply descriptions of operation and references in the manual Caution ...

Страница 35: ...35 Diagnostics 1 If the ambient sensor has trouble 2 If the temperature sensor of the refrigerator has trouble 11 2 If there is a trouble with self diagnosis ...

Страница 36: ...36 Diagnostics 3 If the defrost sensor of the refrigerator has trouble 4 If the temperature sensor of the freezer has trouble ...

Страница 37: ...37 Diagnostics 5 If the defrost sensor of the freezer has trouble ...

Страница 38: ...nutes after compressor is OFF 2 A compressor does not run during defrost period 3 A compressor does not run because a low temperature is detected if freezer and the refrigerator sensor are not connected Pre check 11 3 If the compressor is not working properly ...

Страница 39: ...n OFF 2 When COMP is ON the refrigerator fan is not always ON and when the refrigerator temperature reached a set temperature the fan goes OFF 3 When both the freezer and the refrigerator doors are closed each fan has a delay time 5sec 1 min and then degins to run COMP ON condition Pre check 4 1 When freezer fan F fan do not operate 11 4 If cooling fan doesn t work ...

Страница 40: ...40 Diagnostics 11 5 If the refrigerator fan doesn t work ...

Страница 41: ...41 Diagnostics 11 6 If the compressor cooling fan motor doesn t work ...

Страница 42: ...tics function 2 When the temperature fuse is open there is no heating and a defrost occurs naturally by the compartment temperature increase and eventually it will cause a blinking of temperature 3 When both F R defrost sensors are open heating does not end The compressor remains off and a temperature fuse will be open Refer to self diagnostics function Pre check ...

Страница 43: ...43 Diagnostics ...

Страница 44: ... 2 minutes when the door is open and runs in every 2 minutes 2 If the door is not closed properly MICOM will indicate that the door is open and alarm continues If the alam goes for 10 minutes the light in the compartment will be off and not be on in the situation that the door opens Pre check ...

Страница 45: ...45 Diagnostics 2 If beep sounds continuously 3 When the digital panel PCB does not light ...

Страница 46: ...46 Diagnostics 4 When a button of the digital panel is not selected ...

Страница 47: ...Diagnostics 5 If the lamp of refrigerator fails to light 1 Is the power cord connected to a wall outlet correctly 2 Be careful of high voltage high frequency discharge from the electronic ballast Pre check ...

Страница 48: ...48 12 Illustrated Parts Catalog 12 1 Freezer ...

Страница 49: ...E ASSY PART NAME SPEC OPTION RB1955 RB2155 l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l 115V 242W EVAPFRE 250V EVAPFRE 110 130V 110 130V ASSYSUPT FREE ASSYSUPTFREE 110 130V 15W 115V 115V 60HZ 115V 52W l l l l l l l l l l l l l l l l l l l l l l l l l l l l l 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 DA67 40203N DA67 40182A DA97 00682A DA97 0068...

Страница 50: ...50 Illustrated Parts Catalog 12 2 Refrigerator ...

Страница 51: ...l l l l l l l l l l l l l l l l l l l l l l l l l COVERVEG COVERVEG 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 COVEREVAP 115V 38W DA97 00681A DA97 00681B DA63 01270A DA64 00656A DA66 10104A DA71 20145A DA61 00761A DA61 00760A DA97 00663A DA97 00663B DA64 00449A DA64 00448...

Страница 52: ...52 Illustrated Parts Catalog 12 3 Disassemblyof Door ...

Страница 53: ...5A DA63 00915A DA63 00916A DA41 00225A 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 H...

Страница 54: ...54 Illustrated Parts Catalog 12 4 Cabinet ...

Страница 55: ...41D DA61 40101C DA60 90124A DA61 00178A DA63 40004A DA62 00217A 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...

Страница 56: ...t be the same assembled state as before Check the surrounding conditions of the installed refrigerator When the refrigerator is located at humid or wet place or the installed state is unstable change the location If needed do the ground Especially if there is a possibility of the electric leakage this appliance must be properly grounded Do not allow consumers to use one outlet for several plugs Ch...

Страница 57: ... and check whether it works 2 Measure the apex bisection for open circuit Disconnect the wire connector from the main PCB CN70 71 and measure the following items 3 contact terminal Relay DC 12V Operation DC 0V Standstill DC 12V Operation DC 0V Standstill C NO SHORT C NC OPEN C NO OPEN C NO SHORT SHORT OPEN Category Voltage of coil terminal Judge 2 contact terminal Relay Ref 1 Wireconnectoronthecab...

Страница 58: ...tween 2 Freezer sensor measures resistance of CN30 between 3 R defrost sensor measures resistance of CN30 between 4 F defrost sensor measures resistance CN30 between 5 The measured value above is compared to the sensor specification and the temperature table in speciication found in the manual Unplug the power cord and disconnect the connector from the main PCB CN70 71 and measure the following Di...

Страница 59: ... the TEST button on the PCB after removing the main PCB cover in the machine compartment 2 Buzzer will sound to indicate the forced running Forced running This function is used to turn on the comp and fan immediately regardless of the temperature of freezer using the test button on the main PCB 1 Press the button during forced running Then R defrosting is performed 2 If the button is press during ...

Страница 60: ...0 23420 22390 Resistance Ω Ω 21410 20480 19580 18730 17920 17160 16430 15740 15080 14450 13860 13290 12740 12220 11720 11250 10800 10370 9959 9569 9195 8839 8494 8166 7852 7552 7266 6992 6731 6481 6242 Resistance Ω Ω 6013 5792 5581 5379 5185 5000 4821 4650 4487 4329 4179 4033 3894 3760 3631 3508 3390 3276 3167 3062 2962 2864 2770 2680 2593 2510 2429 2352 2278 2206 Voltage V 4 541 4 518 4 494 4 469...

Страница 61: ...61 11 PCB Circuit Diagram ...

Страница 62: ...50 6193 6896 FAX 82 62 950 6829 Samsung Electronics Co Ltd Refrigerator Division 2004 02 Printed in Korea This Service Manual is a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable International and or domestic law ...

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