Samsung RL33EBMS User manual

MODEL:
RL33EBMS
C C
SERVICESERVICE
MANUALMANUAL
Electric Refrigerator CONTENTS
PREVENTIVE ACTIONS 2
PRODUCT SPECIFICATIONS 3
ELECTRIC & COOLING PART SPEC. & CRITERION 4
FUNCTIONAL & OPERATIONAL INSTRUCTIONS 5
FUNCTIONS 10
CIRCUIT DETAILS 15
TROUBLE ANALYSIS & REPAIR SOLUTIONS 19
PART BREAKDOWN AND LIST 24
DISASSEMBLY & ASSEMBLY 33
CIRCUIT DISGRAM 39

!
1
This represents the materials with regard to the A/C circuit and spare part safety.
Prior to repair, please pull the plug out of the socket from the wall to disconnect the
power to hold the human and wealth harmless.
1-2-1.Direct plug in-and-out is recommended when replacing the relay that attaches to
the compactor lead terminal. When inserting and pulling the plug, relay wobbling
will more likely destroy the compactor terminals or relay.
1-2-2.Restart is not allowed within 5 minutes after power off. Immediate plug in-and-out
will disable the restart.
Do not make any by-pass or circuit change attempt without manufacturer's prior
suggestion.
No prelonged cable or double terminal board is recommended.
For human safety, this procut must be properly earthed. But phone lines and gas
pipes are not recommended for earthing.
!
1. PREVENTIVE ACTIONS
1-1 Safety Precautions
Only qualified technicians who have full command and knowledge of the
cooling system and safety inspection are allowed to deliver the maintenance
service as specified on the manual.
Please be sure to keep the work place ventilated and safe as this product
adopts the combustible and explosive R600a refrigerant.
1-2 Preparations Before Maintenance
This represents the materials included in the appliance maintenance.

1-3.Warning
1)Liquid AddingPipe 2)Turn off the valve core 3)Solder the pipe onto
the compactor
4) Turn on the valve
core tightly
5)Vacuumize and add liquid 6) Onload the pipe nut
1-3-1 Pay attention to the safety during maintenance as R600a refrigerant is
combustible and explosive.
1-3-2 Keep the work place well ventilated without fire source and combustible and
explosive objects arround during the maintenance of R600a refrigerator.
1-3-3 Make sure to lay the R600a clean during CYCLE maintenance (ensure the
system unblocked by inflating nitrogen under HV and LV state.)
1-3-4 Fire soldering is not allowed until the work place is ventilative without R600a
left in the CYCLE.
1-3-5 When no leakage and blocking are found by nitrogen inflation, shut the fire by
the soldering fulid pipe (valve core available at one end) at the process pipe.
1-3-6 Adding the fulid by vacuumizing the liquid pipe and screw on the nut.(no fire,
appliance, MP3, walkman and mobile phone are allowed during operation)
Note: LOCK RING is only used for pipe connection rather than pipe sealing after
adding fluid. If special tools are available for liquid releasing, lead the R600a
via pipes to the designated location.
2
1-4 Special Tools During Maintenance

1-5 Maintenance Method
3
1.Maintenance Environment
1-1 Pay attention to the safety during maintenance as R600a refrigerant is
combustible and explosive.
1-2 Keep the work place well ventilated without sparks and hot resource around
when repairing the refrigerator's cooling system. Soldering or heating are not
recommended. No smoke also.
1-3 Fire soldering is not allowed until the work place is ventilated without R600a
left in the CYCLE.
2.Refrigerant Remnants Discharging
Prior to reinjecting the refrigerant, conduct the trouble inspection. If the leaking
point is found, eject the remained R600a out.
2-1 Open the compactor back cover, reel out the two process pipes and cut them
by a knife or pilers to discharge the remained R600a refrigerant.(See figure 1)
cutting position
2.2 Leave the refrigerant for a while (about 30 minutes) and connect to the dry
nitrogen to ensure R600a refrigerant is completely discharged and the system
are unblocked. connect to the nitrogen
Gas out

3-2 Close the process pipe on the dry filter and connect the compactor's special
liquid process pipe to a vacuum pump for vacuumizing.
4.Reinjection of Refrigerant
4
3.Vacuumizing
3-1 After all the refrigerants are out, repair the leaking points and replace the driers
and process pipes. The compactor must be fitted with the special liquid process
pipes (see below figure)
Special liquid process pipe
fire soldering
4-1 When the pipe is entirely vacuumized, fill in the R600a refrigerant in the
quantity as shown on the brandplate, and weigh by the electric balance. The
injection quantity must be exact to the evel of 2g.
4-2 No fire is allowed around when adding liquid. No pocket mobile phone and
walkman are allowed during operation.
4-3 Turn on the pipe nut when finishing the liquid adding, and sort the pipes to
avoid the abnormal noise.

5
Temp control type
Temp display type Digital
Functions
Fast refrigeration
Door opening alarm
Standard run
Refrigerating off
Fast freeze
Electronic
1EA
3EA
1EA
2EA
1EA
1EA
1EA/1EA
290
90
200
595
646
1768
76
toughened glass shelf
Spotlight Lamp
Bottle guard
Milk guard
Big bottle guard
Egg guard
dairy guard
Cyclopentane
R600a(60g)
Refrigerating compartment
Bottle guard partition
Egg tray
Freeze compartment
1EA
1EA
Rl33EBMS
2. PRODUCT SPECIFICATION
Model
Volume (ISO)
Total volume
Freeze compartment
Refrigerating compartment
N.V. (L)
Size
Width (mm)
Deepth(mm)
Height(mm)
N.W. (Kg)
Cooling mode Compartment cooling
Control &
display
Shelf
Fruit& vege. Tray/partition
Drawer
Ice box
Vesicant
Refrigerant
Three-piece set
Revolving ice box

6
SPEC
Item
Model
Power
230V/50Hz
Compressor
Model
Start mode
Oil type
Evaporator
Condenser
Drying filter
Capillary
Molecular sieve XH-9
Finned
Natural convection
RSCR
Sensor
Heater
Freeze
Refrigerating
Defrost
Environmental temp
Defrost
Air heater
Return-air heater
Fuse Defrost
Defrost Defrost time
Hold time
Run capacitor
Refrigerating compartment
Model
ON temp
OFF temp
PTC relay Model
Resistance
Lamp
Freeze compartment
Gear motor Freeze
compartment
Door light switch
Fan motor
ID 0.72L2800mm
502AT
502AT
502AT
502AT
240V/15W
3-19 hours (vary with environmental temp.)
4hours 10min (first cycle)
240V 6.5W
HC-050K4 2.5A250VAC
220~240VAC,50/60Hz
MN71MNBA6(M2LA49Z)
400VAC/4.5uF
115~125
55~70
B52-120/B
7min 2 min
250V/10A,72 4
15W/220V
7W/220V
280W/220V
JIA XIPERA ZBS1115CY
QP2-12/B
9~17
HC-10
3. SPEC. AND CRITERION OF ELECTRIC & COOLING PARTS
Cooling cycle
Electric spare parts
Capacitor
Overload
protector
Rl33EBMS

A B C D E F G H I J K
G
CB
ED
A
F
J
K
H
I
RL33****
7
595 764.5 9 900 42.5 1768 646 1725 43 38.2 1161
4. FUNCTIONAL & OPERATIONAL INSTRUCTIONS
4-1 Product size
Unit:mm
Code
Model

8
C C
4-2 Part Discription & Disassembly
Pull out the shelf in the
arrow direction to
disassembly it.
Take out the foods
and pull it out in the
arrow direction
Ice box Fruit& vege. Tray/salad box Freeze compartment drawer

condensing pipe
dew proof pipe
liquid barrel
Evaporator
loop pipe
dry filter
Compressor
discharge pipe
silver welding rod soldering
silver welding rod soldering
9
4-3Cooling System Cycle Diagram

10
4-4Circuit Diagram
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11
fan leaf
fan motor
Evaporator
air out
loop air
loop air
4-5 Cold Air Cycle

12
A.Freeze Temperature Control
1) You may control the freeze temperature by setting the freeze temerature from -15 to -23
at 1 interval.
2) Whenever you press the temperature control key, the temperature will display in the following
sequence: -18 ,-19 ,-20 ,-21 ,-22 ,-23 ,-15 ,-16 ,-17 ,-18 .
3) The freeze temperature is initialized as -18 .
5. FUNCTIONS
Part
Initializing
Functions
Display the actual temparature. It will display the default temperature
when the refrigerating temperature falls into the setting range (+5,-3)
and when the freeze temperature falls into the setting range (+3,-3).
When the actual temperature is within the setting range (+5,-3), it will
display the default temperature. If the actual temperature exceeds the
setting vaule of +3, it will display the setting with flashes. if the actural
temperature is less than the setting value of -3, it will display the actual
temperature
When the actual temperature is within the setting range (+3,-3), it will
display the default temperature. If the actual temperature exceeds the
setting vaule of +3, it will display the setting with flashes. If the actual
temparature reaches the setting value of -4, it will display the actual
temperature -1. if the actural temperature is less than the setting value
of -5, it will display the actual temperature -2.
Refrigeraing
Refrigeraing
Freeze
Freeze
General run
Defrost
(forecooling+
heating+
time-delay)
During the defrost forecooling, when the actual temperature is within
the setting range (+5,-3), lock the current display till the first stop due
to compactor defrosting;
During the defrost heating, lock the current display till the first stop due
to compactor defrosting;
During the defrost forecooling, when the actual temperature is within
the setting range (+3,-3), lock the current display till the first stop due
to compactor defrosting;
During the defrost heating, lock the current display till the first stop due
to compactor defrosting;
If the actual temperature is less than the setting of -3, it will display the
actual temperature;
Display FF (Forced Startup)
Display Fd (Forced Defrost)
Fast refrigeration
Fast freeze
Forced Startup
Forced Defrost
5-2 Constant Temperature Control
5-1 Display

3) If you select Refrigeration Off, Fast Refrigeration will end up abruptly with a new start of
Refrigeration Off .
4) If you select Fast refrigeration , the air door will be open until the end of fast refrigeration after
1.5 hours or the end by manual. The air door Open and Stop will be determined by the
refrigerating temperature.
13
D.Fast Freeze
1) Press the Fast Freeze key to activate the fast freeze light and run the compactor and fan motor.
2) The state will display in the following cycle: fast freeze light on fast freeze light off fast
freeze light on. It will change with the a press of the Fast freeze key.
B.Refrigerating Temperature Control
1) You may control the refrigerating temperature from 9 to 1 by pressing refrigerating temerature
key at 1 interval.
2) If pressing the temperature control button, the temperature will display in the following sequence:
5,4,3,2,1,9,8,7,6,5.
3) The refrigerating temperature is initialized as 5 .
Step
Display
Freeze temp.
Control
st nd rd th th th th th th th
Power on 1 press 2 press 3 press 4 press 5 press 6 press 7 press 8 press 9 press 10 press
5432187 965
5432187 965
C.Fast refrigeration
1) Press the Fast refrigeration key, the fast refrigeration light is on, leaving the gear air door open.
2) The state will display in the following cycle: fast refrigeration light on fast refrigeration light off
fast refrigeration light on. It will change with a press of the Fast refrigeration key.
st nd
Step Power on 1 press 2 press Comments
Display Fast refrigeration light off Fast refrigeration light on Fast refrigeration light off
st nd
Step Power on 1 press 2 press Comments
Display fast freeze light off fast freeze light on fast freeze light off
3) If you select Fast Freeze, the compactor and fan will keep running up to 2 hours (start within 10
mins after selection).
4) If the temperature meets the defrost condition during the operation of fast freeze, the fast freeze
defrost period will be prolonged to the end of fast freeze and the access to the defrost state.

5-3 Defrost
A.General Function
1) Defrost consists of 3 sections: forecooling, heating, time-delay;
2) When the following conditions are met, the defrost period is set as 19 hours: the refrigerating
compartment door opening and closing opportunity is less than once; the refrigerating
temperature is under the setting of +6 and the freeze temperature is under the setting of +4 ;
No special functions are selected (Refrigeration Off, Fast refrigeration, Fast Freeze). The defrost
period become 6 hours under other conditions except the above.
3) When the appliance is initialized, the first defrost period is 4 hours.
4) The compactor and fan will stop during defrosting, the air door will be closed during heating, and
the air door will keep running during time-delay.
5) Prior to defrosting, the compactor will keep running for 50 mins for forecooling.
6) Heating is controlled by the evaporator's sensor. If the sensor breaks down or the evaporator
temperature exceeds -5 , heating fails to work and step into the next around.
7) The delayed time is 7 minutes.
B.Defrost During Fast Refrigeration
1) The defrost operation will be delayed during the fast refrigeration run until the end of the fast
freeze.
2) If the fast refrigeration function is cancelled by prior manual operation, the defrost function will
start up. The compactor running time during the fast freeze will be added to the total work time
3) If the Fast Freeze function is selected during the defrost operation, the fast freeze light will be on.
But the actual running will not begin until the end of the defrosting.
14
F. Refrigeration Off
1) You may press the function key to select or give up this funciton.
2) If you select Refrigeration Off function , the gear air door will be closed and the refrigerating
temperature levels with the room temperature.
C.Heater ON/OFF During Defrosting
1) Defrost Heater ON Temperature
E.Standard Run
1) You may press the function key to select or give up this funciton.
2) If you select the Standard Run function, the freeze and refrigerating temperatures will be
controlled at -18 and 5 respectively.
General Defrost Forced Defrost Comments
Lower than -5 Lower than -5 Remains same under all defrosting condition
2)Defrost Heater OFF Temperature
Difference 6 hours 19 hours 4 hours Comments
OFF 12 12
12

15
Test function is to check the product, PCB, process control and maintenance.
After the product function determined by selecting the test switch, you must re-electrify the
appliance to run the self-diagonisis function.
A.Forced Function
1) If you press the Refrigerating Temperature key and the Freeze Temperature key up to 5 minutes
at the same time, the compactor will start running with the display board highlighting FF .
2) If the Forced Function is selected, the compactor will start running without 5 minutes' time delay.
Defrost operation will stop if the appliance is at the state of defrosting.
3) If the forced function is selected, the compactor will keep running for 24 hours. But the
refrigerating temperature may be adjusted by pressing the Refrigerating Temperature key.
B.Forced Defrost
1) If you press the Refrigerating Temperature key and the Freeze Temperature key up to 5 minutes
simutaneously at forced startup state, the compactor will stop running and step into the forced
defrost state with the display board highlighting Fd .
2) If the evaporator sensor's temperature is higher than -5 under the forced defrost state, the
heater will fail to work and the compactor will resumes after the end of time-delay.
A.Compactor Protective Function
1) Restart is not allowed within 5 minutes after the stop of the compactor.
2) For forced startup, the compactor may start working without 5 minutes' time-delay by pressing
the Forced Startup button.
3) When electrifying or switching on the power, this function will start working after 3 minutes'
defrost heating.
4) When opening the refrigerating door, the fan motor will stop running and the air door is closed.
A.Opening Alarm and Illuminator
1) Opening of the refrigerating door for 2 minutes will incur Buzzer (Ding).
2) The alarm will stop with light off after 2 minutes
3) If the door is closed, the alerm will stop at once.
5-4 Test Function
C. Test Quitting
1) If you press the Refrigerating Temperature key and the Freeze Temperature key up to 5 minutes
at the same time under forced defrost state, the forced defrost function will come to a sudden end.
The refrigerator will reset and Fd disappear.
5-5 Other Controlling Functions
5-6 Opening Alarm and Refrigerating Compartment Illuminating Control
A. Self-diagnosis
1) The temperature sensor is considered malfunctional if its temperature go beyond -50 ~ +85 .
If the core chip input voltage exceeds 0.5V~4.5V, it will be deemed as short circuit or open circuit.
5-7 Self-diagnosis

B.Initializing Self-diagnosis
1) The core chip will self-inspect the temperature sensor within 1 minute after power on.
2) Malfunctional sensors found by the self-diagnosis will be reflected on the display at 0.5S interval.
3) If bad sensors are detected, no press will be admitted. All electric loads will be set to the position
of OFF and the regular temperature control will be retained.
4) If the broken down sensors are repaired, the appliance will be reset to the original state.
16
A.Key Press
1) If you press the key under normal work condition , each press will trigger a sound of Ding Dong
2) If you keep pressing the key, only Ding is heard.
3) Fault operation will bring about no sound.
B.Door Opening Alarm
1) Opening of the regrigerating door for 2 minutes will incur Didi alarm.
C.Forced Function
1) Simutaneous press of the Refrigerating Temperature key and the Freeze Temperature button for 5 minutes
will trigger Dudu sound at 0.5S interval.
D.Forced Defrost
1) Only simutaneous press of the Refrigerating Temperature key and the Freeze Temperature button for 5
minutes under forced defrost state will trigger Dudu sound at 0.5S interval.
5-8 Buzzer
NO
1
2
3
4
5
ITEM
Refrigerating sensor
Main evaporator sensor
Freeze sensor
External sensor
Magnetic switch
DISPLAY TROUBLE
Open circuit
short circuit
Open circuit
short circuit
Open circuit
short circuit
Open circuit
short circuit
COMMENTS
Test temp. lower than -50
Test temp. higher than +85
Test temp. lower than -50
Test temp. higher than +85
Test temp. lower than -50
Test temp. higher than +85
Test temp. lower than -50
Test temp. higher than +85
Magnetic spring switch ON/OFF
is unable to be detected after 1
minute's run
Air door relay failure, or motor,
air door magnetic spring switch
or magnet trouble
Self-diagnosis Trouble Sheet
C.Self-diagnosis During Normal Operation
1) If pressing the Fast Refrigeration key and the Function Selection key for 5 minutes simutaneously
during normal run, the appliance will select the self-diagnosis function with EC shown on the
display.
2) During the Self-diagnosis, key press does not work.

RESET
D101-104
In4007
C105
104
C101
1000uF
7
5
18
21
C202
104
Ic02
5195A
I
G
O
Vcc
C203
104
VSS/ASS
17
C801
104
C105
104
C802
104
6. CIRCUIT DETAILS
6-1 Power Supply Part
Power supply
Vcc (DC 5V)
Vcc (DC 12V)
Applied circuit
Chip peripheral circuit and sensor
Control voltage of the display and relay
The AC input voltage will be stepped down by the transformer and be converted into the DC voltage
by the rectifying circuit (D101-104). The 1000F/35V wave filter capacitor will be used to filter out the
residue AC voltage and the manostat 7812 is used to output the steady 12V DC voltage that will be
used as the control voltage of the relay and display. The 12V DC voltage will be regulated by the
manostat 7805 to output the steady 5V voltage, which will be used as the output voltage of the chip
peripheral circuit and various signals (sensor, switch) .
6-2 Reset Circuit Part
The reset circuit part enables the system program to return the system that meets power trouble
or abrupt power-off to the initial state by the memory of the core chip. At the very beginning of
the power-on, the reset chip voltage is LV, and becomes HV after normal operation.

Crystal Viberation
4MHz
19 Xin
20 Xont
1
3
2
4
5
6
Vcc(5V)
R303 10K -F
R305 10K -F
R403 4.7K
R307 10K-F
CN30
WHT
EXT-S/S
R302 1K
R304 1K
R402 10K
R404 10K
R308 1K
C301
104
C302
104
C303
104
C401
104
C402
104
C304
104
26
27
28
29
41
30
18
R303 10K -F
R306 1K
R401 4.7K -F
6-3 Crystal Viberation Part
This circuit is used for the geneation of the resonant clock by receiving and sending the logic
element information within the core chip. The time on the clock will play the role of time base.
The resonance circuit must apply the rated criteria of each element as specification deviation
will change the core chip time and disable the running.
6-4 Sensor Part
Core chip
Freeze Sensor
Door switch
Magnetic switch
Refrigerating
sensor
Main evaporator
sensor
The sensor and the resistance in F precision are respectively connected to Earthing and DC5V.
The resistance value that varies with the temperature are converted into the corresponding voltage.
Test the voltage at the A/D transition interface of the core chip to determine the temperature.

Buzzer
R801
4.7K
DC 12V
35
MICOM
19
512
1
5
7
9
RY72
RY71
NC
NO
Rc71
RY74
CON71
RED
3
6
4
13
11
14
38
6
5
4
+12V
Ic05
3
1
3
2
15
1
16
RY74
1
Rc72
Rc73
6-5 Operation Part
Core chip
Defrost Heater
Compressor
Fan motor
Inside lamp
Gear motor
If outputing the relevant work circuit signals into the core chip port, the driving chip (ULN2003) will
be activated. The DC 12V voltage will set the relay terminals to the position of On due to relay coils
reaction to activate the circuit.
6-6 Buzzer Part
The driving chip is initiated by the core chip generated CLOCK and impose the 12V volgtage on
the buzzer to make it voice a sound.