Samsung RB1855SW Service Manual Download

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Subordinate

R Defrost heater

F Defrost heater

Comp

Comp-circulation fan

R-Circulation fan

F-Circulation fan

R-Lamp

F-Lamp

Evaluation of mea-

surement result

Measurement

terminal

CN70

⑤

①

CN70

⑦

①

CN70

⑨

①

CN71

⑦

①

CN71

⑤

①

CN70

③

①

CN71

⑨

①

CN71

③

①

1. Measure resistance between the terminals and

check for malfunctioning of a load and wire
connection.

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 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:

* Disconnect the connector from the main PCB

CN30.

* Resistance will be lowered while the

temperature rises due to a NTC type sensor.

Ref. 4) Check sensors

Ref. 3) Check a load

Summary of Contents for RB1855SW

Page 1: ...Model RB1855SW Bottom Mounted Freezer SAMSUNG Home Appliance Service ...

Page 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 ...

Page 3: ... 5 5 Warranty information 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 Safety instruction on services 26 Appendix Ⅰ Ⅰ Reference for circuit diagnostics 27 Appendix Ⅱ Ⅱ Circuit diagram 31 ...

Page 4: ...e factory for recommended 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 2002 Models R B 20 55 SW XAA Product R REFRIGERATOR Capacity CU FT B BOTTOM MOUNTED FREEZER BMF OPTION 55 NO DISPENSER 77 DISPEN...

Page 5: ...th screw Door switch Model Starting type Refrigerant Oil Charge Freezer Refrigerator Evaporator Compressor RB1855SW RB1855SL RB2055SW RB2055SL BMF 2 Door Electronic control CYCLO PENTANE CYCLO PENTANE A B S A B S 227 227 241 241 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 Foa...

Page 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...

Page 7: ...5 WARRANTY INFORMATION 7 ...

Page 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 ...

Page 9: ...9 Interior Views and Dimensions MODEL RB1855 RB2055 A 24 3 26 3 B 28 3 30 3 C 57 8 59 8 6 2 Dimensions of Refrigerator Inches ...

Page 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 ...

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

Page 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 ...

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

Page 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...

Page 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 ...

Page 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 ...

Page 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...

Page 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 ...

Page 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 ...

Page 20: ...ons memorized in EEPROM will be restored when the power is on 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 1 Power Fre...

Page 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...

Page 22: ...note 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 refrige...

Page 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...

Page 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...

Page 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...

Page 26: ...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...

Page 27: ... 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...

Page 28: ...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...

Page 29: ... 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 ...

Page 30: ...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...

Page 31: ...31 11 PCB Circuit Diagram ...

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