Samsung RB1855SW User manual

RB1855SW
RB1855SL
RB2055SW
RB2055SL
Model:
Bottom-Mounted Freezer
SAMSUNG Home Appliance Service

2
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
informatio
n.
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

3
Contents
1. Installation ······································ 4
2. Nomenclature ····································4
3. Product Specifications ·······························5
4. Electrical part specifications & standard ·····················5
5. Interior Views and Dimensions···························7
6. Refrigeration Cycle and Cool Air Circulation Route ···············9
7. Mechanical Disassembly······························11
8. Operation Function ·································18
9. Circuit Descriptions·································27
10. Diagnostics·····································35
11. Illustrated Parts Catalog ·····························49
●Appendix ⅠⅠ(Reference for circuit diagnostics) ·················57
●Appendix ⅡⅡ(Circuit diagram) ···························61
12. Safety instruction on services ··························62

4
1. INSTALLATION
2. NOMENCLATURE
1) To protect refrigerator in movement
Use padded hand truck from side only.
2) Remove all protective tape and pad from the refrigerators.
Connect power cord. Adjust the clearance between the doors.
3) Temperature controls ard preset in the 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
RB20 55
SW
/XAC
Product ; R - REFRIGERATOR
Capacity ; CU. FT
B - BOTTOM MOUNTED FREEZER (BMF)
OPTION ; 55-NO DISPENSER 77-DISPENSER
COLOR ; SW-SNOW WHITE SL-NOBLE GRAY
Company Name
Label Location

5
3. PRODUCT SPECIFICATIONS
4. ELECTRICAL PART SPECIFICATIONS & STANDARD
RB1855SW RB1855SL RB2055SW RB1855SL
MK172C-L2U
115V
60HZ
RSCR
R134a
Freol α-10c(Ester), 265cc
Split Fin & Tube Type
Split Fin & Tube Type
Forced & Natural Convection Type
Molecular Sieve XH-9
ID0.82 XL3000
BSBN(Brass screw)
AC125V 1.4A(SSD-6D)
Condenser
Dryer
Capillary tube
Earth 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
102 107
820 X720 X1775(mm) 820 X770 X1775(mm)
Model
Type
Temperature control
Total
Freezer
Refrigerator
Net Capacity
LT(ft3)
Cabinet insulation
Door insulation
Cabinet
Door
Liner
Foam
Net weight(Kg)
Net dimension
(W XDXH)
506 (18.7)
143 (5.9)
363 (12.8)
556 (20.4)
161 (6.5)
395 (13.9)
STANDARD
ITEM
Model
Rated Voltage
Frequency

ELECTRICAL PART SPECIFICATIONS & STANDARD
6
RSCR 250VAC, 12㎌
4TM437RHBYY-53
130±5
69±9
J531Q33E100M200-2
10±20%
IS3210-SNP6D
IS3208-SNP6H
IS3208-SCH6A
ITEM STANDARD
6-22hr (VARY ACCORDING TO THE ENVIRONMENTAL CONOITION)
6-11hr (VARY ACCORDING TO THE ENVIRONMENTAL CONOITION)
10 ± 2min
4hr
± 10min
THERMISTOR (502AT), SPEC:5.0K
Ω AT 25 ℃
Freezer
Type
F-Sensor
Type
R-Sensor
ON(℃)
-23.5℃
-17.5℃
-12.5℃
ON(℃)
2.5℃
5.5℃
8.5℃
Temperature Selection
–25℃
–19℃
-14℃
Temperature Selection
1℃
4℃
7℃
OFF(℃)
-26.5℃
-20.5℃
-15.5℃
OFF(℃)
-0.5℃
2.5℃
5.5℃
Refrigerator
Defrosting
Sensor
Heater
Fuse
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)
TemperatureElectrical parts
242W
52W
120W
38W
AC250V 10A 77±5˚C
Thermal-Fuse for preventing
overheating of Freezer Defrost-Heater
Thermal-Fuse for preventing
overheating of Freezer Defrost-Heater
110V-130V/15W
110V-130/30W
Capacitor
Over-Load
Protector
STARTING-
RELAY
MOTOR-FAN
LAMP
RUNNING
MODEL
TEMP. ON
TEMP. OFF
MODEL
OPERATION
FRE.
REF.
CIRCUIT
FRE
(INCANDESCENT)
REF
(INCANDESCENT)

7
• Deli drawer
Pull it out to disassemble. •
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
•
•
•
•
•
•
•
5. Interior Views and Dimensions
5-1) Shelves and Bins

8
Interior Views and Dimensions
MODEL
RB1855
RB2055
A
617
667
B
705
755
C
1468
1518
5-2) Dimensions of Refrigerator (mm)

9
6. Refrigeration Cycle and Cool Air Circulation Route
Compressor →Sub condenser →Cluster pipe →Hot pipe →Dryer →Capillary tube
→R-Evaporator →F-Evaporator →Accumulator →Suction pipe →Compressor
6-1) Refrigerant Route in Refrigeration cycle

10
Refrigeration Cycle and Cool Air Circulation Route
6-2) Cool Air Circulation

11
7.
Mechanical Disassembly
Refrigerator Disassembly
Control Panel ········································ 12
Refrigerator Light ······································ 13
Freezer Light ········································ 13
Evaporator Cover in the Refrigerator ·························· 14
Evaporator Cover in the Freezer ····························· 15
Evaporator in the Refrigerator······························· 16
Evaporator in the Freezer ································· 16
Machine Compartment ＆Electric Box ··························17

12
Mechanical Disassembly
1. Remove the screws.
2. Pull out the control panel.
3. Disconnect the wire connector.
Control Panel

13
Mechanical Disassembly
1. Remove the screw.
2. Remove the lamp cover by unlocking the tabs
and pulling the cover down.
3. Replace the lightbulb by turning it counter-
clockwise.
4. After replacing the bulb, reattach the 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 Light Freezer Light

14
Mechanical Disassembly
1. Remove all shelves and drawers from the
refrigerator.
2. Pull out the screw caps with a small flat-blade
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.

15
6. Remove 2 screws from the rear cover of the
freezer evaporator and unlock the tabs to
remove it.
Mechanical Disassembly
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
①
①
②
③
②
Evaporator Cover in the Freezer

16
Mechanical Disassembly
Evaporator in the Freezer
Accumulator
Thermistor
Thermal
Fuse
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.
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. Place a new evaporator and braze the suction
and capillary tube to evaporator using silver
solder.
7. Install a replacement dryer.
8. Evacuate and recharge the system using
reasonable procedures.
Evaporator in the Refrigerator
Thermal
Fuse
Thermistor

17
1. Unplug the power cord.
5. Electric box assembly
Make sure the power cord is
unplugged before replacing any
electric components.
Mechanical Disassembly
2. Remove the screws of the compartment cover.
Slide it up and take out from the refrigerator.
3. Machine compartment assembly
Machine Compartment ＆＆Electric Box
Warning
4. Disassemble the electric box cover after
removing the screws with a screwdriver.

18
8. Operation Function
8-1) Display design ··································19
8-2) Temperature Control Function ·························19
8-3) Buzzer alarm function ····························· 21
8-4) Defrosst function································· 21
8-5) Test function ··································· 22
8-6) Function of initial Power ON ·························· 22
8-7) Power failure compensating Function····················· 22
8-8) Self-test function ································· 23
8-9) Display function of the presently operating parts··············· 24
8-10) Actual temperature and selected temperature in display function ···· 25

19
Operation Function
1) Temperature selection of freezer compartment
❈ After the initial key selection, it displays the notch which is presently set up, then within 5
seconds re-memorize the key after 1-2) points mentioned below. If there is no input of the key,
it moves back to the previous temperature display.
1-1) From -14
˚C ~ -25 ˚C , each one key is selected in 1 ˚C interval.
1-2) Selection key operation for Freezer is set up orderly.
1-3) Actual temperature is indicated during both Power-On and electrical failure.
1-4) Standard temperature of each stage is as follows.(standard for 1/3 height)
1-5) After key input, seven-segment indication changes immediately but actual function
operates after 10seconds.
2) Temperature selection of refrigerator compartment
2-1) From 7
˚C ~ 1 ˚C , each one key is selected in 1 ˚C interval.
2-2) After the initial key selection, the former selected temperature is displayed, and within
5seconds temperature selection alters as in 2-3), and when final key input is done, the final
key input temperature converse into a set point after 10 seconds.
2-3) Set up is established orderly according to operation of selection button.
2-4) Actual temperature is indicated during both Power-On and electrical failure.
2-5) Standard temperature of each stage is as follows.(standard for 1/3 height)
2-6) After key input seven-segment indication changes immediately but actual function operates
after 10seconds.
8-1) Display design
8-2) Temperature control function
Stage
Temperature
123456789101112
-14˚C -15˚C -16˚C -17˚C -18˚C -19˚C -20˚C -21˚C -22˚C -23˚C -24˚C -25˚C
Stage
Temperature
1234567
7˚C 6˚C 5˚C 4˚C 3˚C 2˚C 1˚C

20
Operation Function
a) When Quick Freeze is selected, LED indication will immediately change but actual
operation operates after 10 seconds. (COMP and FAN operates continuously for 2 hours
and 30 minutes and it switches off automatically.)
b) When Quick Freeze is selected, it will operate unconditionally without considering the
temperature of freezer compartment.
c) During the operation, the temperature of refrigerator compartment is controlled
automatically by the selected temperature.
d) Temperature display of freezer displays actual temperature.
4) Quick cool.
4-1) Press the on/off buttons of Quick Cool so that the lamp of Quick Cool is light up and off
then it operates its function automatically.
4-2) It does not indicate from initial Power on.
a) When Quick Cool is selected, LED indication will immediately change but actual operation
operates after 10 seconds.
b) When Quick Cool is selected, COMP and R-Fan are operate until the temperature of
refrigerator compartment reached -2°C but the maximum operation time of Quick Cool is 2
hours and 30 minutes. So that, it switches off automatically after 2 hours and 30 minutes.
c) During the operation, the temperature of freezer compartment is controlled automatically
by the selected temperature.
d) Temperature display of refrigerator displays actual temperature.
❈If you press Quick Freeze and Quick Cool button concurrently, each function operates
independently.
3) Quick freeze
3-1) Press the on/off buttons of Quick Freeze so that the lamp of Quick Freeze is light up and
off and then it operates it’s function automatically.
3-2) It does not indicate from initial Power on.
Change of
light indication
Initial Power On Pressed once time Pressed second time Remark
Off Quick Freeze On Off
Change of
light indication
Inition Power On Pressed Once time Pressed second time Remark
Off Quick Cool On Off
If you choose Quick Freeze or Quick Cool when freezer temperature is more than -10°C and
refrigerator temperature is above +10°C just as the initial Power On Condition, it operates
differently from what is mentioned above, and this is an exceptional case.
Reference