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SERVICE MANUAL REFRIGERATOR

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3. CONNECTOR 9 STEPPING MOTOR PIN 9 10 11 12 RD YL BK BL 30 The motor is driven by magnetism formed in the areas of the coils and the stator Rotation begins when a HIGH signal is applied to MICOM Pin 33 of IC10 TA7774P This causes an output of HIGH and LOW signals on MICOM pins 34 and 35 Explanation The stepping motor is driven by sending signals of 3 33 mSEC via MICOM pins 33 34 and 35 as shown in the chart below These signals are output via terminals 10 11 14 and 15 via input terminals 3 6 and 8 of IC10 TA7774P the motor drive chip The output signals allow the coils wound on each phase of the stator to form a magnetic field which causes rotation Input to the terminals INA and INB of IC10 as shown in the chart below drives the motor CCW Reverse rotation 4 Positive rotation CW INA INB gt us 31 1 9 Fan motor driving circuit freezer mechanical area 1 The circuit cuts all power to the fan drive IC resulting in a standby mode 2 This circuit changes the speed of the fan motor by varying the DC voltage between 7 5 Vdc and 16 Vdc 3 This circuit stops the fan motor by cutting off power to the fan when it senses a lock up condition 4 The ground is connector 7 pin 2 Between Between 9 Between Motor OFF 5V 2 or less
4. m Conte 1 2 Oscillation circuit The oscillation circuit generates a basic clock signal for synchronization and time calculation related to the transmission of data and calculations made by the MICOM 1 1 The oscillator OSC1 must always be replaced with an exact rated part because if this spec is changes the time calculations of the MICOM will be affected and it might not work at all CSTLS4M00653 AO e RI3 IC m h XOUT 1 3 Reset circuit The RESET circuit allows various parts of the MICOM such as RAM defrosting etc to be restarted from the initial state when power is interrupted or restored A LOW signal applied to the reset terminal for 10 ms causes the MICOM to reset itself During normal operation the voltage at the reset terminal is 5 Vdc If the reset fails the MICOM will not operate IC 1 MICOM 1 4 Load dispenser operation door opening circuit 1 Load Driving Circuit Tossorioad Dnmressoy Defrost Refrigerator Dispenser Geared Solenoide Solenoide Heater LAMP Heater Motor Cube Dispenser 110 127VAC 110 127VAC 110 127VAC 110 127VAC 110 127VAC 110 127VAC 110 127VAC 110 127VAC 110 127VAC 0 VAC 0 VAC 0 VAC 0 VAC 0 VAC 0 VAC 0 VAC 0 VAC 0 VAC CONA PIN 7 PIN 5 CON4 PIN 3 PIN 1 Measuring Part PIN CONS PIN PIN CONS PIN g CONS amp cons amp CO
5. 3 5 Standard Regulations For Heavy Repair 1 Observe the safety precautions for gas handling 2 Use JIG or a wet towel in order to prevent electric wires from burning during welding In order to prevent insulation break and accident 3 The inner case will melt and the insulation will burn 4 The copper piping will oxidize 5 Do not allow aluminum and copper pipes to touch In order to prevent corrosion 6 Observe that the inserted length of a capillary tube into a drier should be 0 748 0 04 nm d Molecular Pipe Molecular Go EN 0 748 0 04 7 Make sure that the inner diameter is not distorted while cutting a capillary tube 8 Be sure that the suction pipe and the filling tube should not be substituted each other during welding High efficiency pump 78 3 6 Brazing Reference Drawings Pipe Assembly Hot Line Freezer Cooper Brazing Copper Brazing Silver Brazing Silver Brazing Pipe assembly suction Pipe Assembly Joint Copper Brazing gt QUID TR o Pipe assembly V Condenser Assembly wire Copper Brazing Be i Silver Brazing Copper Brazing Copper Brazing 270 4 HOW TO DEAL WITH CLAIMS 4 1 Sound Problems Checks and Measures Hiss sounds Explain general principles of sounds All refrigerators make noises when they run The compressor and fan produce sounds There is a fan in the freezer compart
6. Refrigen Intake When replacing a drier Weld 1 And 2 by blowing nitrogen 0 1 0 2kg cm2 to high pressure side after assembling a drier When replacing a compressor Weld 1 parts by blowing nitrogen to the low pressure side Note For other parts nitrogen blowing is not necessary because it does not produce oxidized scales inside pipe because of its short welding time 3 Replacement of drier Unit inch KEY POINT Be sure to check the inserted length of capillary tube when it is inserted If inserted too far the capillary tube will be blocked by the filter Filter Inserting a capillary tube Measure distance with a ruler and put a mark 0 748 0 04 the capillary tube Insert tube to the mark and weld it 76 Items Precautions 4 Vacuum degassing Evaporator Suction pipe Compressor Condenser Q 2 9 Low pressure amp High Blue pressure Yellow 7 KEY POINT If power is applied during vacuum degassing vacuum degassing shall be more effective Pipe Connection Run the compressor Connect the red hose to the high pressure side and the blue hose to the ris charging the system It is easier and works better low pressure side Vacuum Sequence Open valves 1 and 2 and evacuate for 40 minutes Close valve 1 5 Refrigerant charging Charging sequence 1 Check the amount of refrigerant supplied to eac
7. ACTIVE SIW PS2561 1 4 Dg 1 R301 4 mor ACTIVE LED DI 1 4007 IN4148 i CSTLS4M00G53 A0 a swi r 121 SN i R13 05044 Ga LEVER Ar fs R85 R15 x APPLY TALL DISPENSER SYSTEM AT igs esie mee 2 1 4 CC9 104 d 1uF 50V h ICE MAKER SENSO 10K 56 ICE MAKER DHL STOP SW 1 Freezer room Refrigerator room Temperature Refrigerator Room Temperature R19 RCF1 Compensation 1 Change Resistor Compensation 2 Cut Jump Wire 10K HER 10K ICE MAKER Ee R20 1 TEST S W R21 h 10K 1 24 R22 Door 4 7K Model Type Selection 10K 6 i i 4 HEATING R23 UCRA 10K n DISPENSER LESS 2 2 2 DISPENSER 4 BA6222 ICE MAKER MOTOR OP3 JALWAYSON R82 R81 R80 47 10K 10K r 39 7 AND DISPENSER WORKING PRICIPLES AND REPAIR 1 WORKING PRINCIPLES 1 1 Ice Maker Working Principles Power Input Level Icemaker Cube mold for Initial Control after power is input Initial Control e Wait until the water in the cube mold is frozen after icemaker starts operation Icemaking Control Ice Ejection Control eCheck ice bin is full of ice by rotating the ice ejection motor in normal and reve
8. 1 5 Lock function dispenser and display button lock 1 When the refrigerator is first turned on the buttons are not locked The display panel shows the padlock unlocked icon 2 To lock the display the dispenser and the control panel press and hold the ALARM LOCK button for 3 seconds The locked pad lock icon is displayed 3 The ALARM LOCK button is the only control feature that remains active in the locked state The buzzer sound other control buttons and the dispenser are deactivated 4 To release from the locked state press and hold the ALARM LOCK button again for 3 seconds ALARM LOCK I 1 6 Filter condition display function Ex LOCK Ex LOCK Function ON Function OFF 1 There is a replacement indicator for the filter cartridge on the dispenser 2 Water filter needs replacement once six months 3 Initial month indication is 6 month Water filter icon turn on to tell you need to replace the filter soon 4 When filter indicator becomes 0 MONTH HOLD 3SECS text will be lighting 5 After 6 MONTH has passed 0 month is shown on display to indicate the filter has to be exchanged 6 When 6 MONTH has passed or when filter month indication wants to be Reset press 3 seconds the filter button and the graphic light will come off and month display will be 6 six In initial Power On Filter RESET 7 HOLD 3SECS 13 MONTH 1 7 ICE PLUS selection Please select this function for qui
9. Ice and water are not dispensed Defective connecting lead wire from Main PCB to lever switch Defective lever switch parts Defective photo coupler IC parts Check Lead Wire associated with lever switch with a tester Repair lead wire Remarks Refer to mode indication in function explanations Check model with dispenser Refer to door switch in parts repair guide Replace lever switch Check voltage change at photo coupler output terminals with lever switch pressed It is OK if voltage change is between OV 5V Replace photo coupler IC or PCB Defective relay associated with ice dispense geared motor cube and dispenser solenoid Defective parts associated with ice dispense geared motor cube and dispenser solenoid Defective relay associated with water dispense Check relay RY4 RY5 RY12 with a tester Check resistance of parts with a tester Check relay RY7 with a tester Replace defective relay Replace defective parts Replace defective relay Defective parts associated with water dispenser Check resistance of parts with a tester Replace defective parts Process 3 2 Summary Of Heavy Repair Contents Tools Trouble diagnosis Remove Residuals Parts and welding Cut charging pipe ends and discharge refrigerant from drier and compressor Use R134a oil and refrigerant
10. The food in the chilled drawer is not frozen but defrosted Refrigerator water is not cool The chilled drawer does not freeze food Use chilled drawer for storing fresh meat or fish for short periods For storing for a long periods or freezing food use a freezer compartment It is normal that frozen foods thaw above the freezing temperature in the chilled drawer Check the water storage location f water is kept in the door rack move it to a refrigerator shelf It will then become cooler Ice cream softens Refrigeration is too strong Explain the characteristics of ice cream The freezing point of ice cream is below 15 C 5 F Therefore ice cream may melt if it is stored in the door rack Store ice cream in a cold place or set the temperature control button of a freezer at strong position Check the position of temperature control button Check if refrigeration is strong in whole area of the refrigerator or partly near the outlet of the cooling air If it is strong in whole area set the control button at weak If it is strong only near the outlet of cool air keep food especially damp foods and easily frozen foods away from the outlet Vegetables are frozen Check the vegetables storage If vegetables are stored in the refrigerator shelf or chilled drawer instead of vegetable drawer they will be frozen Set the control button at weakif they are also frozen in the vegetable drawer
11. compartment Causes Cycle pipe is clogged Checks Check sequence 1 Check temperature of condenser manually If itis warm OK If itis not compressor discharging joints might be clogged 2 Manually check whether hot line pipe is warm If itis warm OK If itis not condenser outlet weld joints might be colgged Measures Remarks Heat up compressor discharging Direr must be replaced weld joints with touch disconnect the pipes and check the clogging Remove the causes of clogging weld evacuate and recharge the refrigerant If it s warm OK If it s not condenser discharging line weld joints might be clogged Disconnect with torch remove the causes evacuate and recharge seal refrigerant Leak at loop pipe weld joint discharge in compressor Faulty cooling fan in the compressor compartment Check sequence 1 Manually check whether condenser is warm It is not warm and the frost forms partly on the evaporator in the freezer compartment Check sequence 1 Check cooling fan operation 2 Check that cooling fan is disconnected from the motor Replace the compressor weld Drier must be replaced evacuate and recharge refrigerant Replace if motor does not operate f fan is disconnected check fan damage and reassemble it Refer to fan motor disassembly and assembly sequence 9 2 5 Defrosting failure Problems Causes Checks Measu
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13. Fan is Fan shroud contact Clearance constrained Damping evaporator contact Accumulated residual frost Small cooling air Insufficient Fan overload Fan misuse discharge motor RPM Bad low termperature RPM characteristics Rated power misuse Low voltage Faulty fan Fan misuse Bad shape Loose connection Not tightly connected Insert depth Shorud Bent Ice and foreign materials on rotating parts 5 Compressor capacity Rating misuse Small capacity Low valtage 6 Refrigerant Malfunction of charging cylinder too much or too little Wrong setting of refrigerant Insufficient compressor Faulty compressor 7 Continuous operation No contact of temperature controller Foreign materials 8 Damper opens continuously Foreign materials Adiabatics liquid dump jammed The EPS styrofoam drip tray has sediment in it A screw or other foreign material has fallen into the drip tray or damper Failed sensor Position of sensor Characteristics Bad characteristics of its own temperatue of damper E Parts misuse Charge of temperature Impact characteristics 9 Food storing place Near the outlet of cooling air 51 Check visually after disassembly Check visually after disassembly CLAIMS CAUSES AND CHECK POINTS HOW TO CHECK 4 Warm 1 Colgged cooling path refrigerator Adiabatics liquid leak compar
14. 10 DISPENSER PAD FUNCTION If Ice pad water pad are activated at same time also water and ice will be dispensed If Ice pad active water switch are activated at same time also water and ice will be dispensed f water pad active water switch are activated at same time water pad has a priority gt if water pad has been activated the active switch is ignored gt f water pad has not been activated active switch can be used 11 WATER ACTIVATER LED INDICATOR LED Active switch become On when pressing Active switch and become Off if active switch is not pressed Through LED indicator user can recognized the status of water active function 6 EXPLANATION FOR MICOM CIRCUIT 1 EXPLANATION FOR PCB CIRCUIT 1 1 Power circuit The power circuit includes Switched Mode Power Supply SMPS It consists of a rectifier BD1 CE1 converting AC to DC a switch IC2 switching the DC voltage a transformer and a feedback circuit IC3 and IC4 Caution Since high voltage 160 Vdc is maintained at the power terminal wait at least 3 minutes after unplugging the appliance to check the voltages to allow the current to dissipate Voltage of every part is as follows Part VA1 CE1 CE2 CE3 4 CES Voltage 1110 127 Vac 160 Vdc 14 12 15 5 5 Vdc BD1 D3SBA60 221 400V The part highlighted green are the components of the Switched Mode Power Supply
15. C 1 5 C 1 C 0 5 C No 180 9 F 8 1 F 7 2 F 6 3 F 5 4 F 4 5 F 3 6 F 2 7 F 1 8 F 0 9 F Down Down Down Down Down Down Down Down Down Down change Temperature compensation at the freezer is performed the same as at the refrigerator The value for the freezer is twice that of the refrigerator This circuit enters the necessary level of temperature compensation for adjusting the appliance The method is the same for every model in this appliance family 33 2 Compensation circuit for temperature at freezer Di 217 ICO irta a iron rus je 70 2 r MINI a ola 10K a de i 2 mud Li 10831 1 Fal 1 z 4t Temperature compensation in CUT 1 71 8 F 1 71 8 F 1 1 8 F 1 1 8 F 2 C 43 6 F 2 3 6 F Compensation Compensation for weak cold for over cold Temperature compensation value Remarks JCRA JCR JCR at refrigerator 0 C In shipment from factory 1 C 1 8 F 1 C 1 8 F 1 C 1 8 F 1 C 1 8 F 2 C 3 6 F 2 C 3 6 F 0 C 0 F 0 C 0 F 0 C 0 F 0 C 0 F 1 C 1 8 F 1 C 1 8 F 0 C 0 F e This circuit allows adjustment of the set tem
16. LOWER PART IN THE NORMAL DISPLAY NOTE 1 CUT OR SHORT CIRCUIT WIRE STANDARD RPM REFRIGERATOR COMPARTMENT R2 SENSOR MIDDLE ROOM L NORMAL DISPLAY PART GRAPHIC ON THE PART TURNS ON ABNORMAL DISPLAY PART GRAPHIC ON THE C PART TURNS OFF NORMAL DISPLAY PART GRAPHIC ON THE D PART TURNS ON SENSOR ABNORMAL DISPLAY PART GRAPHIC ON THE D PART TURNS OFF NORMAL DISPLAY PART GRAPHIC ON THE amp amp B PART TURNS ON AMBIENT SENSOR ABNORMAL DISPLAY PART GRAPHIC ON THE 2 PART SHOWS Er THE OTHER D SPLAY GRAPHICS TURN ON AND ON THE PART B SHOWS rt ICE MAKER SENSOR L NORMAL DISPLAY PART GRAPHIC ON THE B PART TURNS ON ABNORMAL DISPLAY PART GRAPHIC ON THE PART TURNS OFF ICE MAKER UNIT NORMAL DISPLAY PART GRAPHIC ON THE PART TURNS ON ABNORMAL DISPLAY PART GRAPHIC ON THE amp PART TURNS OFF 20 Error2 Error3 Error1 ICE TYPE ICE TYPE ICE TYPE CRUSH Tot E A MONTH 49 8 Error7 Error8 Error9 ICE TYPE ICE TYPE ICE TYPE 9 89 CRUSH og 2146 Error4 Error5 ICE TYPE ICE Error10 Error11 ICE TYPE ICE TYPE Q 89 CRUSH 3111 F S01 F Error6 ICE Error12 ICE TYPE sg ai 111 1127 F 1 17 Test Function 1 The purpose of test function is to check function of the PWB and product and to search for the failure part at the failure status 2 lest but
17. Plastic Odor Odors of mixed food and plastic Check wet food is wrapped with Clean the refrigerator Deodorizer option 69 2 9 Problems Symptom Causes Checks Measures Remarks Bad PCB All display Bad connection Bad connector Visual check on connector Reconnect electric power LCD are off between Main PCB connection from main connection connector and display circuit PCB to display PCB Defective PCB PCB transformer Check resistance of PCB Replace PCB Applicable to transformer winding is cut transformer input and output transformer or PCB model without PCB transformer terminals with a tester dispenser temperature fuse is If resistance is infinity trans burnt out winding is cut DefectivePCB electric Defective regulator IC Check voltage at input output Replace regulator Refer to electric circuit parts 7812 7805 terminals circuit in circuit explanation PCB electric terminal Check fuse in PCB electric Replace PCB fuse fuse is burnt out terminal with a tester STR Parts are Check if STR No 2 and 3 pins Replace parts Applicable to damaged are cut when power is off model with dispenser Abnormal Bad connection Lead Wire connecting Check Lead Wire terminals Reconnect Lead display LCD between Main PCB main PCB and display connecting Main PCB and Wire and directly operation and display circuit PCB is cut or connector display PCB with a tester connect defective terminal connection is
18. T 28 33 36 37 55 n GND R501 509 10K X9 ICE PAD 12V E GND ACTIVE LED 5 ACTIVE S W N GND 0109 o SPREE RP KRC106S 5 DUCT HEATER ex us rn CICCIO CER 38 a 2 r TORRE PRP TENNEENENENENNNENENENN CON104 D X GND OPTION PIN _ EN pesa Tact Touch e KT__C eee oS a LT TTT PCB ASSEMBLY DISPLAY CON6 e PIPE HEATER 2 R89 CC3 R1 PRC 330K 1W 220nF 275VAC ASS Y DISPLAY 250V 5A 275VAC R87 10K 28 0201 6 R201 221 400V Ced 220 1 2 0 DOOR KID65003AF 1 RUNNING CAPACITOR M _ APPLY DUCT DOOR MOTOR f e d F SENSOR D SENSOR HCM F DOOR S W P77 AIN17 mn E gt 2 59 Ta N ab CC17 R51 4 7K dc2o 03 I 04 24 R DOOR S W OO amp H BAR DOOR S W R1 SENSOR 00 P50 7 n gt 2 o P01 P47 000 02 TOSHIBA TMP87C841N IC1 01T0874100A 2 N m z 7 o a SOLENOID 0 1uF 120 He ER DISPENSER 250VAC APPLY SQLENOID DISPENSER 1 056 H BAR HEATER
19. When power is initially applied or reapplied after power cut it detects level of icemaker cube mold after completion of MICOM initialization The detecting lever moves up and down 2 The level of ice maker cube mold is judged by output signal high and low signal of Hall IC Make the cube mold to be horizontal by rotating ice ejection motor in normal or reverse direction so that High Low signal can be applied to MICOM Pin No 42 3 If there is no change in signal one minute after the geared motor starts to operate it stops icemaker operation and check the signal every hour It resets initialization of icemaker when it becomes normal 4 It judges that the initial control is completed when it judges the icemaker cube mold is horizontal 5 Ice ejection conducts for 1 cycle regardless of ice in the ice bin when power is initially applied 2 2 Water Supply Control Function 1 This is to supply water into the ice maker cube mold by operating water valve in the mechanical area when ice ejection control is completed and ice maker mould is even 2 The quantity of water supplied is determined by DIP switch and time Water Supply Quantity Table SWITCH WATER SUPPLYING 3 If the water supply quantity setting is changed while the power is on the change will take effect immediately If it is changed while the icemaker is filling the mold the new setting will take effect the next time the icemaker cycles 4 When water supply signal is a
20. accumulator Sound from fin evaporator and pipe during expansion and contraction 3 Bowls and bottles make contact on top shelf 4 Refrigerator roof contact 5 Refrigerator side contact 6 Insufficient lubricants on door hinge 54 CLAIMS 8 Faulty lamp freezer and refrigerator compartment 9 Faulty internal voltage short CAUSES AND CHECK POINTS HOW TO CHECK 1 Lamp problem Filament blows out Glass is broken 2 Bad lamp assembly Not inserted Loosened by vibration 3 Bad lamp socket Disconnection D Bad soldering Bad rivet contact Short Water penetration Low water level in tray Bad elasticity of contact Bad contact corrosion 4 Door switch Defective m Refrigerator and freezer switches are reversed Travlel distance m Bad connection r Bad terminal contact Adiabatics liquid leak 1 Lead wire is damaged Connect conduction and Wire damage when assembling Bracket Cover non conduction parts and Outlet burr in the bottom plate check with tester Pressed by cord heater lead wire evaporator pipe Conduction NG 2 Exposed terminal Resistance OK Compressor Compartment terminal Touching other I components Freezer compartment terminal Touching evaporator pipe 3 Faulty parts Transformer zz contacts cover Welded terminal parts contact cover Compressor Bad coil ins
21. dissembling shroud and grille Check defrosting Check ice on the Faulty defrost sensor Check ice on the intake port in the evaporator and pipes after forced Defrosting cycle refrigerator compartment defrosting 5 User is not familiar with how to Check food holds door open Be acquainted with how to use use Check ice on the ice tray Door opens High moisture food water is stored GQ 2 7 Sound Hiss sound 1 Loud sound of compressor operation 2 Pipes resonate sound which is connected to the compressor 1 1 Check the level of the refrigerator 1 2 Check the bushing seat conditions Sagging and aging 2 1 Check the level of pipes connected to the compressor and their interference 2 2 Check bushing inserting conditions in pipes 2 3 Touch pipes with hands or screw driver check the change of sound 3 Fan operation sound in the freezer compartment 3 1 Check fan insertion depth and blade damage 3 2 Check the interference with structures 3 3 Check fan motor 3 4 Check fan motor bushing insertion and aging conditions 4 Fan operation sound in the compressor compartment 4 1 Same as fan confirmation in the refrigerator 4 2 Check drip tray leg insertion 4 3 Check the screw fastening conditions at condenser and drip tray Measures 1 Maintain horizontal level 2 Replace bushing and seat if they are sagged and aged 3 T
22. 2 or less Motor ON 2 3V 12 14V 8 16V X P54 C FAN PWI E R40 10K 4 7K PSI 50 R43 C FAN LOC R48 I in 52 hy Die R45 E Q ATK i 12 R46 P53 2 3 9K T 223 3X4 o R51 F FAN PW R50 P50 49 2K TU F FAN LOCK 10 CC20 1 102 R41 Q6 DI4 amu 5 74 32 Temperature compensation table at the refrigerator is as follows Modification 2 2kQ 5 6kQ amp 2kO 10kO 12kO 18kO 33kO 56kO 180 resistance No 0 5 C 1 C 1 5 C 25 C 3 C 35 4 C 4 5 C 4700 0 9 F 1 8 F 2 7 F 4 5 F 5 4 F 6 3 F 7 2 F 8 1 F change Up Up Up Up Up Up Up 0 5 C 0 5 1 2 C 2 5 3 C 35 C 4 C 4 5 C 2 0 9 F 0 9 F 1 8 F 3 6 F 4 5 F 5 4 F 6 3 F 7 2 F 8 1 F Down Up Up Up Up Up Up Up Up TO 0 576 No 0 5 C 15 C 2 C 125 3 C 3 5 C 4 C 3 3 1 8 F 0 9 F 0 9 F 1 8 F 2 7 F 3 6 F 4 5 F 5 4 F 6 3 F 7 2 F Down Down change Up Up Up Up Up Up Up Up 15 C 1 C 0 5 No 0 5 1 C 15 C 2 C 25 C 3 5 C 5 6 2 7 F 1 8 F 0 9 0 9 F 1 8 F 2 7 F 3 6 F 4 5 F 5 4 F 6 3 F Down Down Down change Up Up Up Up Up Up Up 2 C Toce 120 0
23. 5 C No 0 5 C 1 C 1 5 C 2 C 2 5 C 8 2 3 6 F 2 7 F 1 8 F 0 9 F 0 9 F 1 8 F 2 7 F 3 6 F 4 5 F 5 4 F Refrigerator Down Down Down Drop change Up Up Up Up Up Up RCR1 2561276 1576 1 C 0 5 0 5 1 C 11 5 2 C 2 5 C 10 4 5 F 3 6 F 2 7 F 1 8 F 0 9 F 0 9 F 1 8 F 2 7 F 3 6 F 4 5 F Down Down Down Down Down change Up Up Up Up Up 3 C 12 5 2 C 1 5 C 1 G 05 C No 0 5 C 1 C 15 2 C 12 5 4 F 4 5 F 3 6 F 2 7 F 1 8 F 0 9 F 0 9 F 1 8 F 27 F 3 6 F Down Down Down Down Down Down change Up Up Up dip eO 25 64 ew 1 C 405 0 5 C 1 C 15 C 18 6 3 F 5 4 F 4 5 F 3 6 F 2 7 F 1 8 F 0 9 F 0 9 F 1 8 F 2 7 F Down Down Down Down Down Down Down Up Up 4 C 3 5 C 3 C 2 5 C 2 C 1 5 C 1 C 0 5 C 0 5 C 1 C 33 7 2 F 6 3 F 5 4 F 4 5 F 3 6 F 2 7 F 1 8 F 0 9 F 0 9 F 1 8 F Down Down Down Down Down Down Down Down change Up Up 4 5 C 4 C 3 5 C 3 C 2 5 C 2 C 1 9 G IG 0520 No 0 5 C 56 8 1 F 7 2 F 6 3 F 5 4 F 4 5 F 3 6 F 2 7 F 1 8 F 0 9 F 0 9 F Down Down Down Down Down Down Down Down Down change Up 5 C 14 5 4 C 35 C 3 C 25 2
24. Holder Lever Cap Assembly Duct Solenoid Reversing valve Cover assembly display Button assembly Button Lever Button decor Switch micro PCB assembly display 10 PCB assembly Timer Key 11 Button assembly 12 Funnel 13 Cover dispenser 14 Decor cover display 15 Tray drain 16 Decor drain 17 PCB assembly display 18 Decor control OF W 5 MICOM FUNCTION 1 MONITOR PANEL Temperature adjustment button for freezer compartment Ice Plus function selection button Alarm button and Lock button p ICE TYPE HOLD oe 3 SECS v MONTH d FREEZER REFRIGERATOR ICE PLUS LIGHT FILTER ALARM LOCK gt 15 Ice option dispenser selection 4 button Temperature adjustment button for refrigerator compartment Lamp On Off button Filter status display RESET button 1 1 Display Function 1 When the appliance is plugged in it is set to 37 F for refrigerator and 0 F for freezer You can adjust the Refrigerator and the Freezer control temperature by pressing the ADJUST button 2 When the power initially applied or restored after a power failure it is set to Control temperature previously ICE FREEZER Toggle between C F REFRIGERATOR Display OFF Mode Demonstration Mode
25. N UR 49 CLAIMS 3 Refrigeration is weak CAUSES AND CHECK POINTS Residual Weak heat from heater Sheath Heater rated frost Heater plate No contact to drain Loosened stopper cord Heater cord L Not touching the evaporator pipe Location of assembly top and middle Too short defrosting time Defrost Sensor Faulty characteristics Seat D missing location thickness Structural fault Gasket gap Air inflow through the fan motor L Bad insulation of case door No automatic defrosting Defrost does not return 3 Cooling air leak Bad gasket adhestion Gap Bad attachment Contraction Door sag Bad adhesion Weak binding force at hinge 4 No cooling air circulation Faulty fan motor motor Self locked Wire is cut Bad terminal contact Door switch Faults Contact distance Button pressure Melted contact Contact Refrigerator and freezer switch reversed Button is not pressed Poor door attachment Door liner dimension Contraction inner liner Misalignment Bad terminal connection Adiabatics liquid leak HOW TO CHECK Check the fan motor conduction OK No conduction NG 50 CLAIMS CAUSES AND CHECK POINTS HOW TO CHECK 3 Refrigeration is weak 4 No cooling air circulation Faulty fan motor
26. Sua It is acceptable is the adjusted water level is less than the optimum level 3 2 Control the amount of water supplied to the icemaker Caution Unplug the power cord from the wall outlet and wait atleastthree minutes before removing the main PWB cover 310 Volts are present in the control panel 1 Disconnect PWB cover from the upper part of the refrigerator 2 Adjust the amount of water supplied by using the DIP 10 Driver switches TE Water Supplying Time Control Option SWITCH WATER SUPPLYING TIME 1 The water supplying time is set at five seconds when the refrigerator is deivered 2 The amount of water supplied depends on the setting time and water pressure city water pressure 3 If the ice cubes are too small increase the water supplying time This happens when too little water is supplied into the ice tray 4 If the ice cubes stick together decrease the water supplying time This happens when too much water is supplied into the ice tray Caution When adjusting the amount of water supplied adjust step by step Otherwise the water may spill over Switch ON Switch OFF 4 HOW TO DISASSEMBLY AND ASSEMBLE 1 REMOVING AND REPLACING REFRIGERATOR DOORS Before remove the doors remove the Base Grille To remove the right refrigerator door 1 Open the door Remove the top hinge cover screw 1 2 Use a flat blade screwdriver to pry back the hooks not s
27. The food stored at inside of the shelf freezes even the control button is set at MID Check if food is stored near the outlet of the cooling air The temperature at cooling air outlet is always below the freezing point Do not store food near the outlet of the cooling air as it block the air circulation Do not block the outlet If the outlet of the cooling air is blocked the refrigerator compartment will not be cooled 82 4 3 Odor and Frost Problems Checks and Measures Odor in the refrigerator compartment Explain the basic principles of food odor Each food has its own particular odor Therefore it is impossible to prevent or avoid food odor completely when food is stored in the completely sealed refrigerator compartment The deodorizer can absorb some portions of the odor but not completely The intensity of odor depends on refrigerator conditions and environments Check the temperature control button and set at strong Clean inside of the refrigerator with detergent and remove moisture Dry inside the refrigerator by opening the door for about 3 or 4 hours and then set the temperature control button at strong Frost in the freezer compartment Explain the basic principles of frost formation The main causes for frosting Door was left open Air penetration through the gasket Too frequent door opening parties etc Hot foods are stored before they are cooled down The temperature of fr
28. Top table part and transmitted Out plate Ref Lower part Flange gap Not sealed Gasket gap 252s CLAIMS CAUSES AND CHECK POINTS HOW TO CHECK 6 Condensation and ice formation 7 Sounds 4 Condensation on door Condensation on the duct door Duct door heater is cut Condensation on the Recess Heater is cut dispense recess Duct door is open Foreign material clogging Condensation on the Not fully NEST Surface Liquid shortage door surface Cormer Liquid leak Adiabatics liquid contraction Condensation Bad wing adhesion Wing sag lower part on the gasket Door liner shape mismatch surface Corner Too much notch Broken Home Bar heater is cut 5 Water on the floor Condensation in the refrigerator compartment Defrosted water overflows Clogged discharging hose Discharging hose Evaporation tray located at wrong place location Tray drip Damaged Breaks holes Small Capacity Position of drain 1 Compressor compartment operating sounds Compressor sound E Sound from machine itself inserted Sound from vibration Restrainer Bushing Too hard seat Distorted Aged Burnt Stopper Bad Stopper Not fit assembly inner diameter of stopper Tilted Not Compressor base not connected Bad welding compressor stand fallen Foreign materials in the compressor compartment
29. contact terminal to bad Lead Wire Defective LCD Defective LCD Check if all LCD are on when Replace display Refer to display Main PCB Test switch is pressed or when both freezer key and power freezer key are pressed at the same time for more than one second PCB circuit in circuit explanation 0 Problems Symptom Causes Checks Measures Remarks Bad cooling Freezer temperature is high Compressor does not start Compressor Lead Wire is cut Defective compressor driving relay Check compressor Lead Wire with a tester Measure voltage at PCB CON2 3 amp 9 after pressing main PCB test switch once It is OK if voltage is normal Reconnect Lead Wire Replace relay 1 and RY2 or PCB Refer to load driving circuit in circuit explanation Defective freezer Sensor Defective Freezer sensor parts Check resistance of freezer sensor with a tester Replace freezer Sensor Refer to resistance characteristics table of sensor in circuit Refer to tables to page 29 The wrong sensor has been installed Order by model number and part number Confirm the color of sensor in circuits main PCB sensor housing Repair main PCB sensor housing explanation Defective freezer fan motor Faulty defrost Fan motor lead wire 15 cut Check fan motor lead wire with a tester Reconnect lead Wir
30. heard When ice is being ejected sounds like Hiss produced by a motor to rotate an ice tray and ice dropping and hitting ice bin sounds are also heard Noise when supplying water Noise when supplying ice Explain the principles of water supplied to dispenser When the water supply button in the dispenser is pressed the water supply valve in the compressor compartment opens and let the water flow to the water tank in the lower part of the refrigerator compartment The water is dispensed by this pressure When this happens motor sound and water flowing sound are heard Explain the principles of ice supply and procedure of crushed icemaking in a dispenser When ice cube button is pressed ice stored in the ice bin is moved by an auger and dispensed If crushed ice button is pressed the ice cube is crushed When this happens ice crushing and hitting ice bin sounds are heard 81 4 2 Measures for Symptoms on Temperature Problems Checks and Measures Refrigeration is weak Check temperature set in the temperature control knob Refrigerator is generally delivered with the button set at normal use MID But customer can adjust the temperature set depending on their habit and taste If you feel the refrigeration is weak then set the temperature control button at strong position If you adjust the button in the freezer compartment as well the refrigeration is stronger than adjusting refrigerator only
31. m COMBO sound Chattering sound Insulation paper vibration Capacitor noise Pipe contacts each other Narrow interval Pipe sound No vibration damper Damping Bushing Q Damping Bushing S Capillary tube unattached 53 CLAIMS CAUSES AND CHECK POINTS HOW TO CHECK 7 Sounds 1 Compressor compartment operating sounds Transformer sound Its own fault Core gap Bad connection Correct screw connection Drip tray vibration E Bad assembly Distortion Foreign materials inside Back cover machine sound 3E Bad connection Partly damaged Condenser drain sound Not connected Bad pipe caulking 2 Freezer compartment sounds m Fan motor sound Normal operating sound Vibration Aged rubber seat Bad torque for assembling motor bracket contact Shroud burr contact Damping evaporator contact Residual frost eT Damaged heater cord Narrow evaporator interval Sounds from fan I Fan guide contact m Unbalance fan sounds Unbalance Surface machining conditions Fan distortion Misshappen Burr on the fan Air intake opposite to motor bushing assembly Motor shaft Supporter disorted contact sounds Tilted during motor assembly Resonance Evaporator noise Evaporator pipe contact No damping evaporator Sound from refrigerant Stainless steel pipe shape in
32. tools arrangement Transportation and installation Remove flux from the silver weld joints with soft brush or wet rag Flux may be the cause of corrosion and leaks Clean R134a exclusive tools and store them in a clean tool box or in their place Installation should be conducted in accordance with the standard installation procedure Leave space of more than 5 cm 2 inches from the wall for compressor compartment cooling fan mounted model Copper brush Rag Tool box 74 3 3 Precautions During Heavy Repair Items 1 Use of tools 2 Recovery of refrigerant 3 Replacement of drier 4 Nitrogen blowing welding Precautions 1 Use special parts and tools for R134a 1 Continue to recover the refrigerant for more than 5 minutes after turning the refrigerator off 2 Install a piercing type valve on the high pressure line drier side Then use the appropriate recovery equipment to recover the refrigerant from the system When the refrigerant has been recovered install a piercing type valve on the low pressure side IT IS IMPORTANT TO OPEN THE SYSTEM IN THIS ORDER TO KEEP THE OIL FROM BEING FORCED OUT The use of piercing type valves will allow future servicing and eliminates the possibility of a defective pinch off Compressor Low pressure side Condenser 1 High pressure side 1 Be sure to replace drier with R134a only when repairing pipes and injecting refrigerant 1 Use p
33. 30 2 0 8 9 40 C 1 4 6 2 KO 50 C 0 8 43kQ e Resistance value allowance of sensor is 5 When measuring the resistance value of the sensor allow the temperature of that sensor to stabilize for at least 3 minutes before measuring This delay is necessary because of the sense speed relationship Use a digital tester to measure the resistance An analog tester has to great a margin of error Resistance of the cold storage sensor 1 and 2 shall be measured with a digital tester e Resistance of the freezing sensor shall be measured with a digital tester after separating of the PWB ASSEMBLY and the MAIN part 36 RT wT DISP DUCT sur SNR LIGHT MOTOR PIPE DISPLAY 2 D4 TRANS 12
34. AN NOTE If the ice tray mold is not horizontal after repair and assembly something must be wrong Check it and reassemble if necessary N N VER ee gt ZA bb 1212 lt q NN v4 2 NN ANS NW V V A Grille fan L B 5 WATER VALVE DISASSEMBLY 4 Separate the Cover Back M C and Valve Screw i i J 1 Turn off the power of the refrigerator pull out the plug Open the F R Door and disassemble the Lower Cover 2 Lay a dry towel on the floor and get ready to pour water from the water tank Then press the collet to separate the tube from the connector and pour out the water until emptied Refer to the label attached on Front L on how to separate the tube Disassembly 1 Pull out tube while pressing collets and disassemble it Assembly 1 Insert tube until you can see only one line 2 After inserting pull out tube to check if it is properly inserted Collet Tube Insert Line 3 Lock the water being supplied Then separate the Water Connection connected to the Water Valve 43 6 DISPENSER 1 Disconnect funnel and button assembly by pulling down 3 Grasp the lower part of the dispenser firmly pull it out and forward 4 Hold the inner side of Cover Dispenser with both hands at the handle side to pull it out forward 2 Pull out the Drain Dispenser Related Parts 1
35. DOOR ALIGNMENT Before adjust the doors remove the Base Grille If the freezer compartment door is lower than the refrigerator compartment door make them level by inserting flat blade screwdriver into the groove of the left leveling leg and rotating it clockwise Height difference __ Left leveling leg Height difference If the freezer compartment door is higher than the refrigerator compartment door make them level by inserting flat blade screwdriver into the groove of the right leveling leg and rotating it clockwise Height difference Left leveling leg Height Adjust the level when the refrigerator door is lower than the freezer door during the installation of the refrigerator Tools you need e Wrench 5 16 in 8 mm e Wrench 3 4 in 19 mm Height difference Height Dk hinge pin Down 4e Using a 19 mm wrench turn the keeper nut clockwise to lossen the keeper nut Using a 5 16 8 mm wrench turn the adjustment hinge pin clockwise or counterclockwise to level the refrigerator and freezer door After setting the level door turn the keeper nut counterclockwise to tighten Do not over tightening the door adjustment screw The hinge pin can be pulled out Adjustable range of height is a maximum o
36. Faulty connection between plug and adapter Fuse blows out Low voltage products are connected to high voltage Short circuit by insects Electricity leakage High voltage Short circuit of components penetration 2 2 Compressor Short circuit by wrong connection tracking due to moisture and dust Check the voltage with tester Check visually Check visually Check the fuse with tester or visually Check the input volt are with tester between power cord and products Check the resistance of power cord with tester if it is OO it is shorted Replace the components Reconnect the connecting parts Reconnect the connecting parts Find and remove the cause of problem ex short high voltage low voltage Replace with rated fuse Replace with rated fuse after confirming its specification If fuse blowns out frequently confirm the cause and prevent Compressor is frozen f compressor assembly parts are normal capacitor OLP apply power directly to the compressor to force operation Auxiliary wnang Power OLP It starts as soon as itis contacted If it is not infinite it is normal Check other parts During forced operation Operates Check other parts Not operate Replace the frozen compressor with new one weld evacuate and recharge refrigerant Refer to weld repair procedures Problems Cause
37. ICE PLUS LIGHT FILTER ALARM LOCK gt 1 2 Display OFF Mode It places display in standby mode until door is opened Press Freezer and ICE PLUS buttons simultaneously to turn all leds become ON and then OFF with the recognition sound of Ding after 5 seconds Be sure not to press only one button to work Once the mode activates the display is always OFF Until door is opened or display button is pressed When 30 seconds has elapsed after closing door or pressing button the display turns OFF To desactivate this mode is same as the activation methods The mode inactivates when resetting the power 1 3 How to Toggle the Display between F amp C The initial setting is F and the display temperature mode can be changed from F to C or C to F by pressing and holding the FREEZER and the REFRIGERATOR keys at the same time for over 5 seconds 1 4 Demonstration Mode OFF Mode 1 Any Door must be opened to enter in this mode 2 To activate this mode press and hold ICE PLUS and REFRIGERATOR button over 5 seconds 3 The display will show the word OFF 4 In this mode all loads are turn off Compressor Heater Fans etc 5 Lamps and Dispenser Functions works normally even in demonstration mode the refrigerator Lamp automatic off function works normally 6 To exit Demonstration mode open any Door then press and hold ICE PLUS and REFRIGERATOR button over 5 seconds Display return to normal mode 16
38. LACK GN GREEN YELLOW PK PINK SKY BLUE BO BRIGHT ORANGE BROWN PR PURPLE 100 127V 220 240 NO FUSE 250VAC 15A CONI AS 1 d N ans BL N CON3 RD 10 27 9 DISP HEATER 6 DEF HEATER FUSE MELTING 72 C SWITCH o Z BL N SB an BL N V SOLENOID CUBE BN AR BL N WATER G BL N Y EC ENSINSINSIN 8 m e oo oo c Z Ere SOLENOID DISPENSER RUNNING PK CAPACITOR NNNNEINS l 4 STARTING 1 CAPACITOR m gt 2 gt 2 70 O a gt A 24 m COMP ACCESSORIES X T COMP ACCESSORIES P T C OPTION LD LQ COMP EG COMP PTC N 3 26 4 COMBO KIT POE T PLN PTC OLP o A GN YL GREEN YELLOW RD RED GRAY WH BK WHITE BLACK WH WHITE RD WH RED WHITE BL WH BLUE WHITE BL BLUE 46 9 TROUBLE DIAGNOSIS 1 TroubleShooting CLAIMS CAUSES AND CHECK POINTS HOW TO CHECK 1 Faulty start 1 No power at outlet 2 No power on cord Bad connection between adapter and outlet faulty adapter dista The dista The thick pes conne The dista Pin outer Inner diameter of adapter nce betwee
39. LG EXE REFRIGERATOR CAUTION PLEASE READ THE SAFETY PRECAUTIONS OF THIS MANUAL CAREFULLY BEFORE REPAIRING OR OPERATING THE REFRIGERATOR MODELS LSC27921SW 5 2 9215 5 2 921 LSC27921SB CONTENTS WARNINGS AND SAFETY PRECAUTIONS 2 3 T SPESIRICANONS ila 4 2 PARTIS IDENTIFICATION an ea 9 3 HOW TO INSTALL THE REFRIGERATOR 6 4 HOW TO DISASSEMBLY AND ASSEMBLE 10 Ss MICOM FUNCTION ea 15 6 EXPLANATION FOR MICOM CIRCUIT 24 7 AND DISPENSER WORKING PRICIPLES AND REPAIR 40 Piel 048 ccm 46 9 TROUBLE DIAGNOSIS sse nhe nnn nnne nh rennen nennen 47 10 EXPLODED VIEW lai 85 2 MN WARNINGS AND PRECAUTIONS FOR SAFETY Please observe the following safety precautions to use the refrigerator safely and correctly and to prevent accident or injury when servicing 1 Be careful of an electric shock Disconnect power cord from wall outlet and wait for more than three minutes before replacing PCB parts Shut off the power whenever replacing and rapairing electric components 2 When connecting power cord wait for more than five minutes after power cord was disconnected from the wall outlet 3 Check
40. NS PIN amp CONS CONS PIN 385 387 1 amp 7 589 587 5 PINS E OFF 25 88761433203 RoHS 26 IC6 KID65003AF RUNNING CAPACITOR RYDMIH SS 112LM N R LAMP CONT BOX CM1 330nF 275VAC VAI SVC621 200V SVC331 100V P74 AIN14 FUSEt P75 250V 15A DISP HEATER AIN15 gt wo 4 o A U N a IC7 ea KID65003AF LH RY9G5NB 1A E 1 mo RY10G5NB 1A E Teil BE AUGER MOTOR N D gt N Bre EN zx En gt N o DS D 14 RY14G5NB 1A E 28 13 RY13G5NB 1A E CIA 99 SOLENOID 0 1uF 120 3 DISPENSER 250VAC aD Door opening sensing circuit a AN 1 2 lt gt 13 40 AS S 5 U a ZAN 2 2 4 NAVV e 32 v In IN 22 L DOOR S W E et 2 t 2 U EY XU ey gt JEL JN 2 lt UNI No yf We gt Ay 39 uU SE po P zm P36 VW j 183 4 M P V 2 A O CONNECTOR 9 CONNECTOR 7 F DOOR SW R DOOR S W 2 RD BO PK PIN 5 amp 6 PIN 3 amp 4 Measur
41. RTMENT EXPLODED VIEW EV IUN 88 EV EXPLODED VIEW ICE amp WATER PARTS 89 EV EXPLODED VIEW MECHANICAL COMPARTMENT SVC KIT COMPRESSOR SS ANS NNI REN S RX A S 0 NA EV EXPLODED VIEW DISPENSER PARTS WANN Hi T nr di Only STS model 91 EV SERVICE KITS Service Kits were created in order to facilitate to technician the way to replace previous components that due to changes for structure material o improves can not be used individually Please refer to next table and identify it in your exploded view Include Part Number Kit D Loc No Part No Description Capacitor Bracket Cover Damper Pipe Harness Assembly Thermistor Assembly PTC Pipe J oint Stopper Compressor 307B ACF67062308 Compressor Assembly OCZZ B2014G 4810JJ 3033B 4 03020A EAD37941001 EBG44336202 MGE58810301 B61877901 TCA32241801 Compressor Set Assembly 92 Reason In order to use it with objective to has the option of request it for a future compressor change and make interchangeable
42. TE lf a tube end is deformed or abraded trim the part away Disconnecting the tube under the door causes about 0 5 liters water to flow out Put a large container at end of tube to prevent water from draining onto the floor Figure 1 10 Reinstalling the rigth Refrigerator door 2 HANDLE REMOVAL Loosen the set screws with a 3 32 2 38 mm Allen wrench and remove the handle NOTE If the handle mounting fasteners need to be tightened or moved use a 1 4 6 35 mm Allen wrench Mounting fasteners 1 Place the door onto the lower hinge pin 2 Fit top hinge 4 over hinge lever latch 5 into place Rotate lever 3 counterclockwise to secure hinge NOTE Regardless the type of hinge lever 3 type1 without rivet or type 2 with rivet the removal process is the same 3 Hook tab on switch side of corner under edge of wire opening in cabinet top Position cover 2 into place Insert and tighten cover screw 1 Reinstalling the left Freezer door Set screw Allen Wrench 1 Feed the water tubes through the lower hinge pin and place the door onto the lower hinge pin 2 Fit top hinge 6 over hinge lever latch 7 and into place Rotate lever 5 clockwise to secure hinge NOTE Regardless the type of hinge lever 5 type1 without rivet or type 2 with rivet the removal process is the same 3 Install the grounding screw 4 an
43. TM437NFBYY Temp 120 C If rating different change it If not OK Check the resistance of both terminals Take the combo off and install it again 47 CLAIMS 2 No cooling 2 Refrigeration system is clogged Moisture Residual moisture Air Blowing Not performed clogged in the evaporator 2156 shot Impossible moisture confirmation Low air pressure Leave it in the air During rest time After work Caps are missed Residual moisture r Not dried in the compressor Elapsed more than 6 months after drying Caps are missed No pressure when it is open No electric Insufficient drier Dry drier Drier temperature power on Capacity Leave it in the air Check on package thermo condition storage after finishing Residual moisture Caps are missed adi transportation During work Air blowing Not performed Performed Too short time Low air pressure Less dry air Moisture penetration Leave it in the air Moisture penetration into the refrigeration oil Short pipe insert Weld Joint Pipe gaps o large clogged Damaged pipes Too much solder The capillary tube inserted depth Too much Drier clogging Foreign material clogging CAUSES AND CHECK POINTS Capillary tube melts Over heat Clogged with foreign materials Desiccant powder oxides Drier angle Reduce
44. This kit is complety For all production interchangeable for any compressor model found for LSC27921 models MFL62215906 OCTOBER 2009
45. UTES STANDARD RPM ABNORMAL REFRIGERATOR FULL OPENING FOR 10 MINUTES FULL CLOSING FOR 15 MINUTES SENSOR1 R1 UPPER PART IN THE CUT OR SHORT CIRCUIT WIRE REFRIGERATOR COMPARTMENT ABNORMAL DEFROST SENSOR CUT or SHORT GROUT wre a HEATER DEFECTIVE FUSE MELTING SHORT FAILED DEFROSTING CIRCUIT UNPLUGGED STANDARD RPM CONNECTOR INDICATED STANDARD RPM 80 MIN LATER AFTER TROUBLE ABNORMAL FREEZING MOTOR DEFECT HOOKED OF LEAD d BLDC MOTOR WIRE TO FAN CONTACT OF STRUCTURES WITH FAN SHORT OR OPEN OF LEAD WIRE THERE IS NO SIGNAL OF BLDC MOTOR MORE ae 5 THAN 115 SECONDS IN OPERATION STANDARD RPM OFF OF FAN MOTOR SHORT OR OPEN OF LEAD WIRE ABNORMAL CONNECTING BETWEEN MAIN PCB COMMUNICATION AND DISPLAY PCB TRANSMISSION STANDARD RPM TRAND RECEIVING PART ABNORMAL ABNORMAL WATERCTANKCBENSOH NORMAL DISPLAY NOTE1 OR SHORT CIRCUIT WIRE OR SHORT CIRCUIT 11 ABNORMAL NORMAL DISPLAY NOTE1 CUT OR SHORT CIRCUIT WIRE ICE MAKER SENSOR FAULTY ICE MAKER UNIT 42 ABNORMAL NORMAL DISPLAY NOTE1 MOTOR OR HALL IC LEAD ICE MAKER UNIT WIRE SHORT CIRCUIT FAULTY MOTOR DRIVING CIRCUIT NOTE 1 R2 SENSOR WATER TANK SENSOR AMBIENT SENSOR ICE MAKER SENSOR AND ICE MAKER UNIT ARE NOT INDICATED ON THE FAILURE MODE INDICATION PART BUT ARE INDICATED IN DISPLAY CHECK MODE TO ACCESS TO DISPLAY CHECK MODE PRESS FREEZER AND ICE PLUS BUTTONS AT THE SAME TIME FOR 1 SECOND ABNORMAL REFRIGERATOR SENSOR2 R2
46. ation on Step Motor damper baffles Defective refrigerator sensor parts Check if Step Motor damper Heater wire is cut with a tester Check the resistance of refrigerator sensor with a tester Replace Step Motor damper or refrigerator control Box Assembly Replace refrigerator Sensor Refer to sensor resistance characteristic table in circuit explanation Refrigerator sensor is substituted for other Sensor Check the sensor color in the circuit main PCB sensor housing Repair main PCB sensor housing Defective refrigerator sensor assembly condition Check if refrigerator sensor is not fixed at cover sensor but inner case visually Fix again the refrigerator sensor S Problems Bad defrost Symptom Defrost is not Causes Defrost lead wire is cut Checks Check if defrost lead wire is cut with a Measures Reconnect Lead Remarks working tester Wire Defective defrost driving relay Check the voltage of CON2 1 and 7 Replace relay RY 7 Refer to load with a tester after pressing main and RY 3 or PCB driving conditions PCB test switch twice check in circuit If the voltage is normal then it is OK explanation Defective defrost sensor parts Check the resistance of defrost sensor Replace defrost Refer to sensor with a tester sensor resistance characteristic table of circuit explanation Defective Buzzer De
47. bling the container box Check icing at intake ports of freezer and refrigerator compartment Check gasket attached conditions Check door assembly conditions Check refrigerator compartment is overcooled when button pressed on weak Check parts are faulty Check frost on the evaporator after dissembling shroud and fan grille Check ice on intake port of freezer and refrigerator compartment Check food interferes with door closing Check ice on the ceilings Measures Be acquainted with how to use Sealing on connecting parts Check the damper and replace it if it has defects Check defrost After forced defrosting check ice in the evaporator and pipes Correct the gasket attachment conditions and replace it Door assembly and replacement Replace faulty parts Check parts related to defrosting Check defrosting Check ice on the evaporator and pipe Be acquainted with how to use Remarks Check the defrost related parts if problem is caused by faulty defrosting Replacement should be done when it cannot be repaired Moisture does not freeze on the evaporator but can be sucked into the refrigerator where it condenses and freezes This interferes with cold air circulation and sublimation of the ice Problem Cause Check Measure Remarks v9 Ice in the freezer 1 Bad cooling air circulation Check food storage conditi
48. ck freezing gt Function is repeat ICE PLUS icon whenever pressing ICE PLUS button gt ICE PLUS function automatically turns off after a fixed time passes ICE PLUS SL as ICE PLUS n 1 8 Dispenser Light Please select this function for DISPENSER LIGHT MODE 1 Normal status LIGHT icon is OFF When dispenser is operated DISPENSER LIGHT is ON 2 ON status LIGHT icon is ON DISPENSER LIGHT is on continuously LIGHT FILTER Dispenser light OFF LED 17 1 9 ICE PLUS 1 The purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice 2 Whenever selection switch is pressed selection release the icon will turn ON or OFF 3 Ifthere is a power outage and the refrigerator is powered on again ICE PLUS will be canceled 4 To activate this function press the Ice Plus key and the icon will turn ON This function will remain activated for 24 hrs The first three hours the compressor and Freezer Fan will be ON The next 21 hours the freezer will be controlled atthe lowest temperature After 24 hours or ifthe Ice Plus key is pressed again the freezer will return to its previous temperature 5 During the first 3 hours 1 Compressor and freezer fan HIGH RPM run continuously 2 If a defrost cycle begins during the first 90 minutes of Ice Plus the Ice Plus cycle will complete its cycle after defrosting has ended If the defrost cycle begins w
49. d connect all the wire harnesses 3 4 Hook tab on door switch side of cover 2 under edge of wire opening in cabinet top Position cover into place Insert and tighten cover screw 1 5 Reconnect the water tubes by inserting the tubes into the connectors 411 3 FAN SHROUD GRILLE 4 ICEMAKER ASSEMBLY 1 Loose one screw with a screwdriver blade 1 Dispenser Model 2 Disassembly of an upper grille fan Hold upper part of an upper grille fan U and pull forward carefully 1 How to disassemble 3 Disassembly of a lower grille fan Hold upper part of a 1 Remove ice bin from the freezer compartment lower grille fan and pull forward carefully 2 Loose the screw on the upper part of icemaker bracket 4 Disassembly of an upper freezer shroud Hold lower part 3 Disconnect icemaker bracket so that it can slide forward oull forward and disconnect housing A and B 4 Disconnect icemaker housing and sensor housing 5 Check foam sticking conditions around a shroud upper 5 Disconnect icemaker horizontally by pressing bracket hook freezer and lower freezer during assembling If damaged part Don t disassemble further The set value may be torn or badly stuck assemble with a new one afer sealing changed well 2 The assembly is the reverse order of the above disassembly Shroud f U Housing B IceMaker Bracket Grille fan U Insulatio Sensor SN Sensor Cover AS NSOE
50. d cross section by cutting Squeezed Compressor cap is disconnected Foreign materials are in the pipe HOW TO CHECK Heat a clogged evaporator to check it As soon as the cracking sound starts the evaporator will begin to freeze The evaporator does not cool from the beginning no evidence of moisture attached The evaporator is the same as before even heat is applied 48 CLAIMS 3 Refrigeration is weak CAUSES AND CHECK POINTS 1 Refrigerant Partly leaked Weld joint leak Parts leak 2 Poor defrosting capacity path pipe clogged r Inject adiabatics into drai hose Foreign materials penetration Defrost heater does not Parts Plate generate heat disconnected heater Cord heater Inject through the hole Seal with drain Adiabatics lump input Damage by a screw or clamp Other foreign materials input Cap drain is not disconnected Wire is cut Heating wire Contact point between heating and electric wire Dent by fin evaporator Poor terminal contacts Wire is cut Lead wire Heating wire Contact point between heating and electric wire Heating wire is corroded Water penetration Bad terminal connection HOW TO CHECK Check visually Check terminal Conduction OK No conduction NG If wire is not cut refer to resistance P Power V Voltage R Resistance
51. d or poor if there would be position signal for more than 115 seconds at the BLDC motor Then it displays failure refer to failure diagnosis function table at the display part of refrigerator the BLDC motor doesn t operate more If you want to operate the BLDC motor turn off and on power resource 1 11 Control of cooling fan motor 1 The cooling fan motor performs ON OFF control by linking with the COMP 2 It controls at the single RPM without varying RPM 3 Failure sensing method is same as in fan motor of freezing fan motor refer to failure diagnosis function table for failure display 1 12 Door opening alarm 1 Buzzer generates alarm sound if doors are not closed even when more than a minute consecutively has passed with doors of freezing cold storage room or Refrigerator Room are open 2 Buzzer rings three times in the interval of 0 5 second after the first one minute has passed after doors are opened and then repeats three times of On Off alarm in the cycle of every 30 seconds 3 If all the doors of freezing cold storage room or Refrigerator Room are closed during door open alarm alarm is immediately released Doors of freezing cold storage room Closing Opening Closing Opening Closing or Refrigerator Room 1 1 1 3 Times 3 Times 3 Times 3 Times BUZZER 5 gt Within A minute 30 30 30 a minute seconds seconds seconds 18 1 13 Ringing of compulsory operation compulsory
52. e Defective door switch freezer refrigerator home bar Defective fan motor Defective fan motor driving relay Measure the voltage between PCB power blue line and fan motor after pressing test switch of Main PCB If the voltage is normal it is OK Replace door switch freezer refrigerator and home bar Replace fan motor Replace relay RY5 amp RY6 or PCB Refer to faulty defrost items in trouble diagnosis functions Refer to load driving circuits in circuit explanation Refer to trouble diagnosis function 51215 Problem Symptom Bad cooling Wrong Refrigerator temperature Cause Defective Step Motor Damper Defective refrigerator sensor Check Step Motor damper motor and reed switch and lead wire are cut Check Step Motor damper part Check Step Motor damper Motor driving relay in PCB Check Check if Step Motor damper motor and reed switch lead wire are cut with a tester Measure Reconnect lead Wire Remarks Refer to Step Motor damper in parts repair guide Refer to Step Motor damper in parts repair guide Replace Step Motor damper or refrigerator control box Assembly Replace relay or PCB Refer to single motor damper driving circuits in circuit explanation Foreign materials in Step Motor damper baffles Check Step Motor damper baffle visually Remove foreign materials Ice form
53. e direction and sotps under icemaking or waiting conditions If ice bin is not full ice ejection starts The cube mold tilts to the maximum and ice is separated from the mold and ice checking lever raises lce ejection motor stops for 1 second if Hall IC signal changes from OFF low to ON high after 3 6 10 seconds when ice ejection motor rotates in normal direction If there is no change in Hall IC signals within 1 minute after ice ejection motor operates ice ejection motor stops as ice ejection motor or hall IC is out of order If ice ejection motor or Hall IC is abnormal ice ejection motor rotates in normal direction to exercise initial operationlt resets the ice maker if ice ejection motor or Hall IC is normal mold stops for 1 second at maximum tilted conditions The mold returns to horizontal conditions as ice ejection motor rotates in reverse direction When the mold becomes horizontal the cycle starts to repeat Water Supply gt Ice Making Ejection Mold Returns to Horizontal Maximum tilting point not full HALL IC ON EM alli l1 liL SIGNALS OFF Bin is 1 full HALL IC ON OUTPUT 14 SIGNALS OFF ICE CHECKING LEVEL 30 Ho TM 8 0 10 41 53 58 160 170 Lock lcemaking Ice Checking Ice Ejection Lock Original point 2 1 sec Horizonta Level Retrun Conditions Conditions 42 2 5 Test Function 1 Itis to force the op
54. e water outlet 4 Push the heater plate to suction duct manually and assemble the disconnected parts 1 Turn off the power confirm impurities and ice in the gap and supply hot water until the ice in the gap melts down 2 Push the Heater plate to drain bottom with hand and assemble the disconnected parts Faults replace How to replace Refer to main parts 9 Problems No defrosting Melting fuse blows 1 Lead wire is cut 2 Bad soldering Ice in the Suction duct 1 Icing by foreign materials in the duct 2 Icing by cool air inflow through the gap of heater plate 3 Icing by the gap of heater plate Bad cool air inflow and discharge and bad defrosting due to faulty contact and insertion bad connector insertion into housing of heater melting fuse and motor fan Check melting fuse with tester If 00 OK If oO wire is cut 1 Check the inner duct with mirror Check by inserting soft copper wire into the duct soft and thin copper not to impair heating wire 1 Turn on power open or close the door check that motor fan operates If it operates motor fan is OK 2 Disconnect parts in the refrigerator compartment check the connection around the housing visually defrost and confirm heat generation on the heater Do not put hands on the sheath heater 3 Check the parts which have faults described in 1 amp 2 mechanical model disconnect ther
55. eezer is 19 C 2 2 F if temperature is set at MID If hot air comes into the refrigerator fine frost forms as cold air mixes with hot air If this happens quite often much frost forms inside of the refrigerator If the door is left open in summer ice may form inside of the refrigerator Frost in ice tray Explain basic principles of frost formation When ice tray with full of water is put into a freezer compartment the water evaporates If cool air fan operates the moisture attached to the jaw protruded part of ice mold will freeze and form frost If warm water was put into the ice mold the situation will become worse 83 4 4 Others Problems Checks and Measures The refrigerator case is hot Explain the principles of radiator The radiator pipes are installed in the refrigerator case and partition plate between the refrigerator and the freezer compartment in order to prevent condensation formation Particularly in summer or after installation of refrigerator it may feel hot but it is normal If there is not enough space to dissipate heat it can be hotter due to lack of heat radiation Please install a refrigerator in a well ventilated place and leave the clearance between refrigerator and wall Small holes in a door liner Explain that the hole is for releasing gas A small hole in the door liner is for releasing gas during insulation materials lining work With a releasing hole formin
56. el Return Water Supply If icemaker stop switch is set to ON normal cycle operates Icemaking Ice Ejection gt Level Return Water Supply If is set to OFE ice making conducts but ice ejection level return and water supply do not work 45 8 CIRCUIT CIRCUIT DIAGRAM CAPACITOR PART COMPRESSOR EARTH PART P T C OPTION FUSE PART amp COMP ACCESSORIES ON CIRCUIT DIAGRAMS ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITIES AND ACCORDANCE WITH MODEL TYPE NEUTRAL FUSE PART APPLICATION OPTIONAL PWB ASSEMBLY MAIN FUSE FUSE PART 1250 15A MH wer PR 11 EAN ME MoTOR BLDO NL 9 t S MOTOR BLDC MEINTE F DOOR OPEN 8 1 6 PERCEPTION 8 RD 5 BO 4 DEFROST SENSOR o WH 2 F SENSOR RD 10 ICE MAKER MOTOR MI fa ICE MAKER Perf TEST SIW 5 S W 15014 le 0503 ICE MAKER SENSOR p CON10 ICE LEVER SW cea TAR WATER LEVER S W 6 00 PCB ASSEMBLY eg SIW 2213 STEPPING MI YL MOTOR R2 SENSOR 2 3 GY 6 R1 SENSOR i WH R DOOR OPEN BO 4 PERCEPTION D PR HEATER SHEET DAMPER ME BN CON2 CONI PWB ASSEMBLY PWB ASSEMBLY LAMP LAMP WATER TANK 10 SENSOR fami eve AMBIENT 1 1 SENSOR iH PWB ASSEMBLY DISPLAY B
57. ent door does not open properly When the door is open warm open air comes into the compartment and is mixed up with cool air This mixed air shall be compressed and increase the internal pressure when door is closed This causes the door sticked closely to the refrigerator in a moment If the refrigerator is used for a long time it will open smoothly When the refrigerator compartment door is opened and closed the freezer compartment door moves up and down When the refrigerator compartment door is opened and closed fresh air comes into the freezer compartment and moves up and down the freezer compartment door Door opens too easily There is a magnet in the gasket so it closes securely without a gap It can be held open easily if something is in the way and obstructs the door s closing A door does not close properly f the refrigerator is not properly leveled the doors will not close easily Adjust the level using the leveling screws under the front of the refrigerator 84 EV 10 EXPLODED VIEW FREEZER DOOR EV EXPLODED VIEW REFRIGERATOR DOOR 86 EV EXPLODED VIEW FREEZER COMPARTMENT INS X AY N ANN SAY CANAUX V N z CAA AAA AN YY CDA WY ENNA 2 ANZ NON CNN 87 REFRIGERATOR COMPA
58. erated after 7 minutes mode 2 status LIGHT FILTER ALARM LOCK 1 18 Function of dispenser and water dispenser built in 1 While the refrigerator Door is opened Dispenser function can t be used 2 There are 2 dispenser pads first pad is for get water and second is for get ice 3 In order to get ice after select ICE CRUSH option then press the dispenser ICE pad ICE TYPE Ice Pad 4 When pressing Ice Pad duct door is opened by electric solenoid Duct door solenoid the duct door will remain opened 5s after release dispenser pad 5 When pressing WATER PAD the WATER solenoid is opened allowing water dispensing the water Pad switch is connected to main PCB directly main PCB get this signal as input to control pilot valve and water valve When water pad is released the pilot valve and water valve is closed and water dispensing will stop 22 6 While using dispenser ice or water function and the door is opened the operation will be stopped 7 If the water or ice Pad exceeds 3 minutes the Geared motor cube or water solenoid will turn OFF automatically but the duct door will remain opened 5 second after this interruption this is a protection to avoid solenoid overheating and coil break 8 DISPENSER CRUSH CUBE option selected by user is stored in EEPROM immediately after pressing the button 9 While pressing a water pad the water will be dispensed and when water pad is release the water dispensing will stop
59. eration during operation test service and cleaning The test switch is mounted under the automatic icemaker The test function starts when the test switch is pressed for more than 1 2 second 2 Test button does not work during ice ejection and water supply It works when it is in the horizontal conditions If mold is full of ice during test function operation ice ejection control and water supply control do not work 3 If the mold is in the horizontal normal position and the TEST switch is pressed for more than 1 2 second ice ejection will begin regardless of how frozen the water might be When the ejection is completed the icemaker will refill the mold with water Consequently problems related to filling ejecting and returning to the horizontal position can be checked using the test switch When this test is performed the buzzer will sound and water will fill the mold Check the icemaker for repair if the buzzer does not sound 4 When water supply is completed the cycle operates normally as follows Icemaking Ice ejection Returning to horizontal conditions Water supply 5 Remove ice from the icemaker cube mold and press test switch when icemaker cube mold is full of ice as ice ejection and water supply control do not work when cube mold is full of ice 2 6 Other functions relating to freezer compartment door opening 1 When freezer door is open ice dispenser stops in order to reduce noise and ice drop 2 When freezer door is
60. es LED 2EA Yes 4 40W Blue 1 FIX 2 S OUT Yes No Plastic 3 Yes 1 40W Blue 3EA WIRE 724 mm 281 2 E 528 LO Q eX 2 co OD View 2 PARTS IDENTIFICATION N Use this page to become more familiar with the parts and features Page references are included for your convenience Note This guide covers several different models The refrigerator you have purchased may have some or all of the items listed below The locations of the features shown below may not match your model O Freezer Door Rack Refrigerator Shelf Ice Bin Qs Pan For storage of ice cubes made by the icemaker For storage of meat or fresh food Do not store anything except ice in the ice bin 8 Refrigerator Door Rack Q Freezer Lamp Vegetable Drawer Freezer Shelf PCB Cover Drawer Q Base Grille Dairy Corner For storage of dairy products such as butter and cheese Display Frame O Refrigerator Lamp Ice amp Water Dispenser Button Water Filter Water Tubes 3 HOW TO INSTALL THE REFRIGERATOR 1
61. f 72 1 27 cm AFTER LEVELING THE DOOR HEIGHT Make sure the front leveling legs are completely touching the floor 2 WATER FILTER Before removing or installing water filter 1 Take out the top shelf and move it to the lowest level 2 Remove the lamp cover by pressing the tab under I ale the cover and pulling cover to the front 3 IMPORTANT Turn off household water supply Installing the water filter Remove red cap from the filter and insert the two tabs on the filter tip into the two slots in the refrigerator filter receptacle You should feel the filter entering completely Turn the filter to the right a quarter turn clockwise to lock it into place The locked symbol will be lined up with the indicator arrow gt SQ Removing the water filter 1 For first time installation remove filter substitute cap A by turning it counterclockwise a quarter turn and pulling it down After installing water filter 2 For subsequent installation remove old filter by a Replace the cover lamp and shelf to the initial slowly turning it to the left a quarter turn and pulling it position down b Dispense 2 5 gallons 9 46 L of water dispense for approximately 5 minutes to purge the system Open the refrigerator door and check the shelf area for lt g
62. fective connecting lead wire from Check lead wire related to door Repair lead wire buzzer continuously main PCB to door switch switch with a tester rings or door Defective door switch parts Refer to door switch in parts repair Replace door switch opening alarm guide does not work Defective Buzzer does Key input wire is cut or bad connector Check input wire with a tester Reconnect lead Refer to display display button not sound terminal contact in main PCB and wire and replace or circuit in circuit and buttons do not operate display PCB connecting lead wire directly connect bad contact terminal to lead wire explanation Key is continuously depressed due to structural interference Disassemble frame display and confirm visually Adjust or replace interfering structures 90 Problems Defective display button Door Buzzer Symptom Buzzer does not sound and buttons do not operate Buzzer continuously rings or door opening alarm does not work Causes Trouble mode indication Defective connecting lead wire from main PCB to door switch Defective freezer compartment door switch parts Checks Check trouble diagnosis function Check lead wire associated with door switch Refer to door switch in parts repair guide Measures Repair troubles Repair lead wire Replace Freezer compartment door switch Bad water ice dispenser
63. fere with each other 3 Reduce vibration with bushing and restrainer if it is severe especially compressor and pipe 4 Replace compressor stopper if it vibrates severely 1 Explain the principles of refrigeration and that the temperature difference between operation and defrosting can make sounds 2 If evaporator pipe contacts with other structures leave a clearance between them freezer shroud or inner case 19 Problems Causes Checks Measures Remarks Sound Popping almost the same as animals crying sound Water boiling or flowing sound Sound of whistle when door closes It happens when refrigerant expands at the end of capillary tube It happens when refrigerant passes orifice in accumulator internal pipes by the pressure difference between condenser and evaporator When door closes the internal pressure of the refrigerator decreases sharply below atomosphere and sucks air into the refrigerator making the whistle sound Check the sound of refrigerant at the Check the restrainer attached on the initial installation evaporator and capillary tube weld Check the sound when the refrigerator joints and attach another restrainer starts operation after forced defrosting If itis continuous and servere insert Check the restrainer attachment capillary tube again depth 15 3mm conditions on the evaporator and Fasten the capillary tube t
64. for compressor and drier Confirm N2 sealing and packing conditions before use Use good one for welding and assembly Weld under nitrogen gas atmosphere N2 gas pressure 0 1 0 2kg cm Repair in a clean and dry place Filter side cutters Pipe Cutter Gas welder N2 gas Evacuate for more than forty minutes after connecting manifold gauge hose and vacuum pump to high drier and low compressor refrigerant discharging parts pressure sides Evacuation Speed 113 liters minute Vacuum pump R134a exclusively Manifold gauge Refrigerant charging and charging inlet welding Check refrigerant leak and cooling capacity Weigh and control the allowance of R134a charging canister in a vacuum conditions to be 5 g with electronic scales and charge through compressor inlet Charge while compressor operates Weld carefully after pinching off the inlet pipe Check leak at weld joints Minute leak Use electronic leak detector Big leak Check visually Note Do not use soapy water for check Check cooling capacity 1 Check radiator manually to see if warm 2 Check hot line pipe manually to see if warm 3 Check frost formation on the whole surface of the evaporator R134a exclusive charging canister mass cylinder refrigerant R134a manifold gauge electronic scales pinch off plier gas welding machine Electronic Leak Detector Driver Ruler Compressor compartment and
65. frost removal buzzer 1 If pressing the test button in the main PCB Phi sound rings 2 In selecting compulsory operation alarm sound is repeated and completed in the cycle of On for 0 2 second and Off for 1 8 second three times 3 In selecting compulsory frost removal alarm sound is repeated and completed in the cycle of On for 0 2 second Off for 0 2 second On for 0 2 second and Off for 1 4 second three times 1 14 Defrosting Removing frost 1 Defrosting starts each time the accumulated COMPRESSOR runnig time is between 7 and 50 hours This time is determinated by how often and how long the dorrs are opened 2 For initial power or for restoring power defrosting starts when the compressor running tume reaches 4 hours Defrosting stops if the sensor tempreature reaches 41 F 5 C or more If the sensor doesn t reach 41 F 5 C in 1 hours the defrost mode is malfunctioning Refer to the defect diagnosis function 8 1 15 4 Defrosting won tfunction if its sensor is defective wires are cut or short circuited 1 15 Refrigerator room lamp automatically off Refrigerator room lamp turn on and off by refrigerator door switch If refrigerator room lamp continuously turns on more than 7 minutes the refrigerator room lamp turns off automatically by 1 16 Sequential operation of built in product Built in products such as compressor frost removal heater freezing room fan Cooling Fan and step motor damper a
66. g can be easily done Electric bills are too much Condensation on the inside wall of the refrigerator compartment and the cover of properly vegetable drawer Explain that the hole is to allow the air to escape when vacuum forming plastic parts and pumping foam insulation into cavities NOTE Holes and releasing gas appear to be very crude and would not be acceptable in a manual There are small holes in the plastic liner of some parts of the refrigerator These holes allow plastic parts to be injection molded and vacuum formed by allowing air bubbles to be expelled They also allow foam insulation to be pumped into cavities where air bubbles may build up Explain how to store foods Condensation forms when refrigerator is installed at damp area door is frequently opened and wet foods are not stored in the air tight container or wrapped Be sure to store wet foods in airtight containers or securely covered in plastic wrap When is the power connected When should the power be connected You can connect the power immediately after installation However if the refrigerator was laid flat before or during installation you must stand it upright for 6 hours before plugging it in This allows the refrigerant oils to return to the sump in the compressor If you operate the refrigerator before the oil has had a chance to settle you could damage the compressor Door does not open properly Refrigerator compartm
67. h model after completing vacuum degassing 2 Evacuate charging canister with a vacuum pump 3 Measure the amount of refrigerant charged Measure the weight of an evacuated charging canister with an electronic scale Charge refrigerant into a charging canister and measure the weight Calculate the weight of refrigerant charged into the charging canister by subtracting the weight of an evacuated charging canister Indicate the weight of an evacuated charging canister KEY POINT Be sure to charge the refrigerant at around 25 C 77 F Be sure to keep 5g in the winer and 5g in summer Calculation of amount of refrigerant charged the amount of refrigerant charged weight after charging weight before charging weight of an evacuated cylinder Ve Items Precautions Evaporator Compressor Condenser Charging Canister 4 Refrigerant Charging Charge refrigerant while operating a compressor as shown above 5 Pinch the charging pipe with a pinch off plier after completion of charging 6 Braze the end of a pinched charging pipe with copper brazer and take a gas leakage test on the welded parts 6 Gas leakage test Test for leaks on the welded or suspicious area with an electronic leakage tester 7 Pipe arrangement When replacing components be sure in each cycle each pipe is replaced in its original position before closing the cover of the mechanical area
68. heck the sound whether it comes from the pipes vibration and friction Insert bushing or leave a space between pipes to avoid the noise Fix the fan blade if it is hitting on the shroud Fix the drip tray if it is loosened Sound depends on the installation location Sound becomes louder if the refrigerator is installed on a wooden floor or near a wooden wall Move it to the another location f the refrigerator is not leveled properly a small vibration can make a loud sound Please adjust the level of the refrigerator 80 Problems Checks and Measures Sounds of water flowing Explain the flow of refrigerant When the refrigerator stops the water flowing sound happens This sound happens when the liquid or vapor refrigerant flows from the evaporator to compressor Click sounds Explain the characteristics of moving parts This noise comes from the MICOM controller s switch on the top of the refrigerator when it is turned on and off Noise of Icemaker operation applicable to model with Icemaker Noise produced by ice dropping and hitting ice bin Noise from motor sounds Hiss Explain the procedure and principles of Icemaker operation Automatic Icemaker repeats the cycle of water supplying Icemaking ice ejection When water is supplied the water supply valve in the machine room makes sounds like Hiss and water flowing also makes sound When water freezes clicking sounds are
69. hen Ice Plus has run for more than 90 minutes Ice Plus will run for two hours after the defrostis completed 3 If Ice Plus is pressed during defrost Ice Plus icon is but this function will start seven minutes after defrost is completed andit shall operate forthree hours 4 If Ice Plus is selected within seven minutes after compressor has stopped the compressor compressor delays seven minutes shall start after the balance of the delay time 5 The fan motor in the freezer compartment runs at high speed during Ice Plus 6 Forthe rest of the 21 hours the freezer will be controlled at the lowest temperature 1 10 Control of variable type of freezing fan 1 To increase cooling speed and load response speed MICOM variably controls freezing room fan motor at the high speed of RPM and standard RPM 2 MICOM only operates in the input of initial power ICE PLUS Load response and Test mode 1 for the high speed of RPM and operates in the standard RPM in other general operation 3 If opening doors of freezing cold storage room while fan motor in the freezing room operates the freezing room fan motor normally operates If being operated in the high speed of RPM it converts operation to the standard RPM However if opening doors or Refrigerator Room the freezing room fan motor stops 4 As for monitoring of BLDC fan motor error in the freezing room MICOM immediately stops the fan motor by determining that the BLDC fan motor is locke
70. hown on the cabinet underside of the cover 2 Lift up the cover 3 Disconnect all the wire harnesses 3 4 Remove the grounding screw 4 1 Open the door Remove the top hinge cover screw 1 5 Rotate hinge lever 5 counterclockwise Lift the top 2 Use a flat blade screwdriver to pry back the hooks hinge 6 free of the hinge lever latch 7 not shown on the cabinet underside of the cover 2 Lift up the cover NOTE Regardless the type of hinge lever 5 type1 without rivet or type 2 with rivet the 3 Rotate the hinge lever 3 clockwise Lift the top hinge removal process is the same 4 free of the hinge lever latch 5 NOTE Regardless the type of hinge lever 3 FN CAUTION When lifting the hinge free of the latch type without rivet or type 2 with rivet the be careful that the door does not fall forward removal process is the same 4 Lift the door from the lower hinge pin 6 Lift the door from the lower hinge pin being careful to pull the water lines through the lower hinge pin 5 Place the door inside facing up on a nonscratching m surface 7 Place the door inside facing up on a nonscratching surface ZN CAUTION When lifting the hinge free of the latch be careful that the door does not fall forward Removing the left freezer door with water line connection Pull up the water feed tube while pressing area Figure 1 as shown in the figure below e NO
71. if the power plug or card is pinched between the refrigerator and the wall If the cord is damaged it could cause fire or electric shock 4 If the wall outlet is ocerloaded it may cause a fire Use a dedicated circuit for the refrigerator 5 Be sure the outlet is grounded This is particulary important in wetor damp areas 6 Use standard electrical components 7 Make sure hooks are correctly engaged Remove dust and foreign materials from the housing and connecting parts 8 Do not fray damage run over kink bend pull out or twist the power cord 9 Please check for evidence of moisture intrusion in the electrical components Replace the parts or mask with insulation tape if moisture intrusion was confirmed 10 Do not touch the icemaker with hands or tools to confirm the operation of geared motor 11 Do not suggest that customers repair their refrigerator themselves This work requires special tools and knowledge Non professionals could cause fire injury or damage to the product 12 Do not store flammable materials such as ether benzene alcohol chemicals gas or medicine in the refrigerator 13 Do not put anything on top of the refrigerator especially something containing water like a vase 14 Do not put glass bottles full of water into the freezer The contents will freeze and break the glass period 15 When you scrap or discard the refrigerator remove the doors and dispose of it where children a
72. ing part IC1 MICOM PIN 39 40 Door of Freezer Refrigerator Closing 9 B D Switch at both ends are at Off status Opening D Switch at both ends are at On status Since door switches A and B are interconnected if either fails the other will not respond properly f either switch fails the light will not come on 28 1 5 Temperature sensing circuit CONG RT1 63 R29 10KF 7 ER 12 2 Tour RT SENSoR 223 RW1 7h 50V 8 2 R30 m 7 223 4 50 VD F SENSOR 2K CC14 z 223 4 RD1 10uF 50V RR1 P62 58 CORP ae CAO 16121 RI SENSOR 223 RR2 50V 6 59 R54 26 1KF OO eO 224 gt Je K SE R2 SENSOR CC23 223 2 50V RIM1 CONS 60 R62 16 2KF 23 Ex ICE MAKER SENSO 223 150V LOCATION CONG PIN7 8 CONG PIN9 10 1 6 Switch entry circuit The following circuits are sensing signal form the test switch damper motor reed switch for testing and diagnosing the refrigerator 1 7 Option designation circuit model separation function The citrcuit configuration is Op1 open and Op2 in short these circuits are preset at the factory and can not be altered Connection Status Application Standard Non M Room m 1 8 Stepping motor operation circuit
73. ment which blows cool air to freezer and refrigerator compartments Hiss sounds are heard when the air passes through the narrow holes into the freezer and refrigerator compartments Cooling Fan sound in the compressor compartment There is a fan on the back of the refrigerator which cools the compressor compartment If there is a small space between the refrigerator and the wall the air circulation sounds may be noticeable Noise of Compressor This operating sound happens when the compressor compresses the refrigerant The compressor rotates at 3600 RPM The sound of compressor Bigger refrigerators make more noise than small ones Click sounds Explain the principles of temperature change The sounds happens when pipes and internal evaporator in the refrigerator compartment expand and contract as the temperature changes during the refrigerator operation This sound also happens during defrosting twice a day when the ice on the evaporator melts Clunk sound Explain that it comes from the compressor when the refrigerator starts e When the refrigerator operates the piston and motor in the compressor rotate at 3600 RPM This sound is caused by the vibration of motor and piston when they start and finish their operation This phenomenon can be compared with that of cars When an automobile engine starts it is loud at first but quiets down quickly When the engine stops so does the vibration Vibration sound C
74. mostat from the assembly Faullty parts parts replacement Check wire color when maeasuring resistance with a tester 1 Turn power off 2 Raise the front side door side support the front side legs and let the ice melt naturally If power is on melt the frost by forced defrosting 3 Reassemble the heater plate 1 Check the faulty connector of housing and reassemble wrongly assembled parts 2 If the parts are damaged remove the parts and replace it with a new one 0 2 6 Icing Problems Icing in the refrigerator compartment Damper icing Pipe icing Discharging pipe icing Causes 1 Bad circulation of cool air Clogged intake port in the refrigerator compartment Sealing is not good Too much food is stored and clogs the discharge port Bad defrosting 2 Faulty door or refrigerator compartment Faulty gasket Faulty assembly 3 Overcooling in the refrigerator compartment Faulty damper in the refrigerator compartment Faulty MICOM faulty sensor 4 Bad defrosting Heater wire is cut Defective defrost sensor Defrosing cycle 5 Customers are not familiar with this machine Door opens High temperature high moisture and high load Checks Check the food is stored properly check discharge and intake port are clogged Check icing on the surface of baffle and cool air path pipe after dissem
75. n The fan may be refrigerator and walls minimum broken if cleaning 50mm Remove dust and contaminants performs while the refrigerator is on from grill for easy heat radiation Remove the dust with vacuum cleaner from the coils condenser while the refrigerator is off 68 2 4 Cooling Problems High temperature in the freezer compartment Causes Refrigerant leak Shortage of refrigerant Checks Check sequence 1 Check the welded parts of the drier inlet and outlet and drier auxiliary in the compressor compartment high pressure side Check the end of compressor sealing pipe low pressure side Check silver soldered parts Fe Check bending area of wire condenser pipe in compressor compartment cracks can happen during bending Check other parts compressor compartment and evaporators in freezer compartment Check frost formation on the surface of evaporator in the freezer compartment f the frost forms evenly on the surface it is OK f it does not it is not good Measures Weld the leaking part recharge the refrigerant Find out the leaking area repair evacuate and recharge the refrigerant No leaking remove the remaining refrigerant and recharge new refrigerant Remarks Drier must be replaced Drier must be replaced 09 Problems High temperature in the freezer
76. n holes nce between terminals ness of terminal ction between plug and adapter faulty plug nce between pins diameter 3 Shorted start circuit No power on power cord COMBO is off Faulty COMBO 4 During defros Faulty soldering Internal electrical short Faulty terminal contact Loose contact Large distance between male terminal Thin female terminal Terminal disconnected Bad sleeve assembly Short inserted cord length Disconnected Weak connection Wom out tool blade Capacity of COMBO is small Characteristics of COMBO is wrong Bad connection Power is disconnected Inner Ni Cr wire blows out Bad internal connection Faulty terminal caulking Cu wire is cut Bad soldering No electric power on compressor Faulty compressor Power does not conduct Damage Characteristics of COMBO is wrong Bad connection with pe loose compressor Assembly is not possible Bad terminal connection t Be automatic defrost Cycle was set at defrost when the refrigerator was produced Disconnected copper wire Power cord is disconnected Measuring instrument Multi tester Check the voltage If the voltage is within 85 of the rated voltage it is OK Check the terminal movement Check both terminals of power cord Power conducts OK No power conducts NG Check rating of OLP OLP 4
77. o suction capillary tube weld joints pipes or detach in the compressor compartment Explain the principles of freezing cycles Check the sound when compressor is Explain the principles of freezing cycles turned on and refrigerant flowing phenomenon by Check the sound when compressor is internal pressure difference turned off f sound is servere wrap the accumulator with foam and restrainer Check the sound by opening and Broaden the cap of discharge hose for closing the refrigerator or freezer doors defrosting in the compressor compartment Seal the gap with sealant between out and inner cases of hinge in door 89 2 8 Odor Odor from the deodorizer odors Odor from the old deodorizer plastic bowl and bag happens in the new refrigerator Check the deodorizer odors Persuade customers not to use plastic bag or wraps with wet food or odorous foods Dry the deodorizer with dryer and then in the shiny and windy place Remove and replace the deodorants Food Odor Food garlic kimchi etc Check the food is not wrapped Dry the deodorizer in a sunny place Check the shelves or inner with adequate ventilation wall are stained with food juice Store the food in the closed Be sure food is securely covered container instead of vinyl wraps with plastic wrap Clean the refrigerator and set Chedk food cleanliness button at strong
78. ons Be acquainted with how to use Check the parts related compartment Intake port is clogged in the freezer visually Check clogging at intake Check defrost Check ice on the to defrosting if the Surface of fan compartment and discharging port of cooling air evaporator and pipes after forced problem is caused by grille Discharging port is Clogged Check food occupation ratio in defrosting the faulty defrosting Wall of freezer Too much food is stored volume Less than 75 compartment Bad defrosting Check frost on the evaporator after Cool air dissembling shroud and fan grille discharging port Check icing at intake port of Basket rack refrigerator compartment area Food surface 2 Bad freezer compartment door Check gasket attachment Correct the gasket attachement Replace when it can not cing in the Faulty gasket conditions conditions and replace it be repaired shute Faulty assembly Check door assembly conditions Door assembly and replacement 3 Over freezing in the freezer Refrigerator operates pull down Replace defective parts compartment Check if it is operated Faulty MICOM intermittently The Temperature of freezer compartment is satisfactory but over freezing happens in the refrigerator compartment even though the notch is set at weak 4 Bad defrosting Check frost on the evaporator after Check parts related to defrosting Heater wire is cut
79. open during ice ejection and cube mold returning to horizontal condition ice ejection and cube mold level return proceed 3 When freezer door is open geared motor and cube ice solenoid immediately stop and duct door solenoid stops after 5 seconds 4 Water dispenser stops in order to protect water drop when freezer door is open 5 Test function operates normally regardless of refrigearator compartment door opening 43 3 ICEMAKER TROUBLESHOOTING Troubleshooting It is possible to confirm by pressing freezer and refrigerator temperature control buttons for more than 1 second icemaker is normal if all LEDs are ON refer to trouble diagnosis function in MICOM page 20 Is DC Power 5V and 12V output normal No Failed DC Power Change main PWB Check DC power 5V 12V Yes Is cube ice LCD off during troubleshooting check Yes Failed icemaking sensor Replace Icemaking Sensor Check the resistance of both ends 1 2 of icemaking sensor of CONG Defects between icemaking NO sensor and board Pin No 60 of IC1 Is Crushed Ice LCD off during troubleshooting check Yes Failed Icemaker Unit Replace Icemaker Unit Is the resistance of both ends 9 10 of ice ejection motor of CONG between 18 and 22 Replace Main PWB No e 5 ice ejection motor drive circui IC11 and peripheral circuits normal e Defects between Hall IC and Board Pin No 21 of IC1 e Confi
80. ouch the piping at various place along its route Install a damper at the point where your tuch reduces the noise 4 Avoid pipe interference 5 Replace defective fan and fan motor 6 Adjust fan to be in the center of the fan guide 7 Leave a clearance between interfering parts and seal gaps in the structures 8 Reassemble the parts which make sound 9 Leave a clearance if evaporator pipes and suction pipe touch freezer shroud Remarks 99 Problems Causes Vibration sound 1 Vibration of shelves and foods in the refrigerator 2 Pipes interference and capillary tube touching in the compressor compartment 3 Compressor stopper vibration 4 Moving wheel vibration 5 Other structure and parts vibration Irregular sound 1 It is caused by heat expansion Click and contraction of evaporator shelves and pipes in the refrigerator Checks 1 1 Remove and replace the shelves in the refrigerator 1 2 Check light food and container on the shelves 2 1 Touch pipes in the compressor compartment with hands 2 2 Check capillary tube touches cover back 3 1 Check compressor stopper Vibration 4 1 Check vibration of front and rear moving wheels Touch other structures and parts 1 1 Check time and place of sound SOUrces Measures Remarks 1 Reassemble the vibrating parts and insert foam or cushion where vibration is severe 2 Leave a clearance where parts inter
81. p NITTO E s Di Su gt 9 RS Q 0 9 5 8 3 5 la Cum 2 9 wu 1 LU i 1 gt S CON101 12V 5V e 12V GND 1C201 Pe KID65783AF TD62783AF hi 1C202 ni KID65003AF ULN2003AF Q101 KRC106S EN CREEP TRANSFER receve 3 ICING SENSOR 1 CE104 1 10uF A 223 1 150V m sOPTIONAL Po KID65003AF 1 ULN20034F R216 R108 1 104 4 7 1 R107 8 KIA7042AF CC108 2 CC109 d 104 m EIOS T 104 R218 180 1W 150 101 CUT R219120 1W 2 TMP86FS49F CSTCE8M00G55 8 00M xin Empty Flash P NO EAN30784301 Xout 8 7 i CC110 38 104 6 2 o r4 5 n 1065 BUZZER ERRATO aio BM 20B lt gt 1 KRC106S ne e CON102 12V SV R405 R406 R407 R408 GND 3 4 7 24 7K e4 7K e 4 7K a R401 2K WATER VALVE 6 a SOLENOID DISPENSER 7 a m R409 102 WATER PAD 2K R410 2K SOI m R412 5 HEATER 9 OM ch 33 R431 GND 52 4 7 ICE MAKER POWER sol Rags 2 i 53 4 7K SAD 0106 ggetoes R433 DISPENSER LAMP 13 z 3 54 24 7 ds a pawn CON103
82. perature for compensation by changing jumpers at locations JCR1 JCR4 34 1 10 Communication circuit and connection L Wire between main PCB and display PCB The following communication circuit is used for exchanging information between the main MICOM of the Main PCB and the dedicated MICOM of the LED Display PCB A bi directional lead wire assembly between the two boards is required for the display to function properly Poor communication occurs if a continuous information exchange fail to continue for more than 2 minutes between main MICOM of main PCB and LED dedicated MICOM for LED control of display PCB Main PCB L Wire FD H 4 wires Display PCB DC 12V Main MICOM LCD LED dedicated MICOM GND Transmission error status Reception notch status UCI ICE TYPE FREEZER REFRIGERATOR ICE PLUS LIGHT FILTER ALARM LOCK ssecs 35 1 Sensor resistance characteristics table Measuring Temperature C Freezing Sensor Cold storage 82 Frost removal sensor Outside sensor 20 C 22 3 77 15 16 9 60 kQ 15 C 13 0 47 3 5 10 1 38 4 0 7 8 30 kQ 5 6 2 24 1 10 4 9 19 5 15 3 9 15 9 20 3 1 13 25 2 5 11
83. pplied to water and ice valves at the same time during water supply water shall be supplied to water valve If water supply signal is applied to ice valve during water supply water shall be supplied to both water and ice valves 2 3 Icemaking Control Function 1 Icemaking control is carried out from the completion of water supply to the completion of ice making in the cube mold Icemaking sensor detects the temperature of cube mold and completes ice making ice making sensor is fixed below icemaker cube mold 2 Icemaking control starts after completion of water supply control or initial control 3 The icemaker determined it s cycle is completed when the Icemaking sensor reaches 8 C 17 6 F after 100 minutes have passes since water filled the mold 4 It is judged that icemaking is completed when ice maker sensor temperature reaches below 12 C after 20 minutes in condition 3 41 2 4 Ice Ejection Control Function 1 2 N This is to eject ice from ice maker cube mold after icemaking is completed If Hall IC signal is on within 3 6 10 seconds after ice ejection motor rotates in normal direction it does not proceed ice ejection but waits If the ice bank is full ice ejection motor rotates in normal direction in every hour to check the condition of ice bank If the ice bank is not full the water supply control starts after completion of ice ejection control If the icebin is full ice ejection motor rotates in revers
84. re sequentially operated as follows for preventing noise and part damage occurred due to simultaneous operation of a lot of parts in applying initial power and completing test Function Load Operation Sequence Remark If error occurs during Def sensor o operation Above 45 C initial ON ON operation is not done 2 O 0 3 10 0 3 5 0 3 lt si a load Y POWER sec Dpp grp sec sec DISP sec DISP movement ON HIRON gt sequence in 5 ON case of the F R O DE room closed 241 lt Lower than 45 C In service lt pressing sw once more in the 0 3 0 3 F FAN 0 3 STEPPING test mode 2 or PRESS gt LOADS gt i Once ON ON defrost sensor 15 more than 5 C it returns to the O test mode for gt A case of I sensor initial operation 7 hi T comp operates TEST MODE 2 TEST SW COMP sec sec DEF sec STEPPING after minutes PRESS gt OFF 1 C FAN gt HEATER MOTOR 2 Times OFF ON CLOSE 1 FAILURE DIAGNOSIS FUNCTION O PROPER OPERATION FAILURE CODE PRODUCT OPERATION STATUS IN FAILURE INDICATION PART FREEZER ROOM NOTCH REFRIGERATOR ROOM NoTCH CONTENTS OF FAILURE FREEZING COOLINGBLDC DEFROST STEPPING MOTOR TEMPERATURE DISPLAY TEMPERATURE DISPLAY HEATER DAMPER ABNORMAL CUT OR SHORT ORCUTT WRE OR SHORT CIRCUIT WIRE ON FOR 15 MINUTES FREEZER SENSOR outor sHoRT ocur wne oi FOR 15 MIN
85. re not likely to play in or around it 1 SPECIFICATIONS SPECIFICATIONS GENERAL FEATURES 1771 mm 6911 16 in Color Dimensions Net Weight Capacity Refrigerant Climate class Rated Rating Cooling System Temperature Control Defrosting System Insulation Compressor Evaporator Condenser Lubricanting Oil Drier Capillary Tube First Defrost Defrost Cycle Desfrosting Device Anti freezing Heater MODELS LSC27921SW Super White LSC27921ST LSC27921TT LSC27921SB Stainless Titanium Black 35 x 35 x 70 in 266 6 lbs 27 cuft R134a Temperate N 115V 60Hz Fan Cooling MICOM control Full Automatic Heater Defrost Cyclo Pentane EGX90HLC Starting Type TSD 115V Fin Tube Type Wire Condenser Ester ISO 10 280ml 9 47 fl oz Front View MOLECULAR SIEVE XH 7 ID 00 85 4 6 Hours 13 70 Hours Heater Sheath Water Tank Heater 1746 5 mm 683 4 in 1771 mm 6911 46 in 1741 5 mm 681 2 in SPECIFICATIONS Case Material Door Material Handle Type Display Graphic Basket Quantity Ice Tray amp Bank Buckey Dairy Tray Drawer Dispenser Lamp REFRIGERATOR Lamp Shelf Tray meat Egg Bank Basket Quantity Lamp FREEZER Shelf MODELS LSC27921SW LSC27921ST LSC27921TT Embo normal 912 mm 3529 32 in Vista ICE PLUS 4 Full LSC27921SB VCM Auto Ice maker Space Plus 908 mm 351 in Yes Y
86. res Remarks No defrosting Heater does not generate heat as the heating wire is cut or the circuit is shorted 1 Heating wire is damaged when inserting into the evaporator 2 Lead wire of heater is cut 3 Heating wire at lead wire contacts is cut 1 Check the resistance of heater 00 Short Cut Tens to thousands 2 Check the resistance between housing terminal and heater surface 00 Short Cut Tens to thousands Short Heating wire is short and wire is cut Parts replacement Refer to parts explanations Seal the lead wire with insulation tape and heat shrink tube if the cut lead wire is accessible to repair Suction tube and discharge orifice 1 Impurities 2 Ice Gap between Suction duct and Heater plate Ice in the gap Wrong heater rating or wrong assembly 1 Confirm foreign materials In case of ice insert the copper line through the hole to check 2 Put hot water into the drain check drains outside 1 Confirm in the Suction duct 1 Check heater label 2 Confirm the capacity after substituting the resistance value into the formula p V V Rated voltage of user country R Resistance of tester O Compare P and lavel capacity Tolerance 7 1 Push out impurities by inserting copper wire Turn off more than 3 hours and pour in hot water if frost is severe 2 Put in hot water to melt down frost 3 Check th
87. ressurized nitrogen to prevent oxidation inside the piping Nitrogen pressure 0 1 0 2 kg cm 5 Others 1 Only nitrogen or R134a should be used when cleaning the inside of piping of the sealed system 2 Check leakage with an electronic leakage tester 3 Be sure to use a pipe cutter when cutting pipes 4 Be careful not the water let intrude into the inside of the cycle 75 3 4 Practical Work For Heavy Repair Items 1 Removal of residual refrigerant 2 Nitrogen blowing welding Precautions Evaporator Low pressure side KEY POINT Observe the sequence for removal of refrigerant If not compressor oil may leak Compressor Release Refrigen Condenser Intake 1 Continue to recover the refrigerant for more than 5 minutes after turning the refrigerator off 2 Install a piercing type valve on the high pressure line drier side Then use the appropriate recovery equipment to recover the refrigerant from the system When the refrigerant has been recovered install a piercing type valve on the low pressure side IT IS IMPORTANT TO OPEN THE SYSTEM IN THIS ORDER TO KEEP THE OIL FROM BEING FORCED OUT The use of piercing type valves will allow future servicing and eliminates the possibility of a defective pinch off Evaporator KEY POINT Welding without nitrogen blowing produces oxidized scales inside a pipe which affect performance and reliability of a product
88. rm ice ejection and level return when pressing test switch Are ice ejection and level return normal when test switch is pressed for more than 1 2 second Does the bell sound once NO Failed icemaker unit test switch Replace Icemaker Unit e Are both ends 5 6 of CON test switch open e Defects between test switch Yes and board Pin No 18 of IC1 e Are both ends 3 4 of icemaker stop switch short No Poor water supply Replace water supply valve e 15 power applied to water supply valve e Does the water supply Yes valve work normally Is water suppy normal after Ice ejection and level return by ice ejection motor e s the water supply line normally connected Normal 44 4 ICEMAKER CIRCUIT CONS RIM1 R62 16 2KF ICE MAKER SENSOR NS ICE MAKER E E 208811 STOP SW 2405 TEST S W HALL 1 ICE MAKER BA6222 MOTOR 27 223 CC28 a5 CC29 223 o oO R81 1 ON 10K 4 10K 10K 22 gt The above icemaker circuits are applied to LSC27921 and composed of icemaker unit in the freezer and icemaker driving part of main PWB Water is supplied to the icemaker cube mold through the solenoid relay for ice valve of solenoid valve in the mechanical area by opening valve for the set time Water supply automatically stops when water suppl
89. rse direction and eject ice into the ice bin if ice bin is not full eConduct Icemaking Control after supplying water into the icemaker cube mold by operating water valve Water Supply Control Test Control eThis is for refrigerator assembly line and service When icemaking test switch is pressed it operates in the following steps initial ice ejection water supply control steps 1 2 Dispenser Working Principles This function is available in Model LSC27921 Refer to appendix where water and ice are available without opening freezer compartment door Crushed is automatically selected when power is initially applied or reapplied after power cut When dispenser selection switch is continuously pressed light is on in the following sequence Water gt Cube Ice gt Crushed Ice Lamp is on when dispenser button is pressed and vice versa o A When dispenser crushed ice rubber button is pressed dispenser solenoid and geared motor work so that crushed ice can be dispensed if there is ice in the ice bin If there is ice in the bin pushing the dispenser button will dispense it When dispenser water button is pressed water valve opens and water is supplied if water valve is normally installed on the right side of the machine room lce and water are not available when freezer door is open N O 40 2 FUNCTION OF ICE MAKER 2 1 Initial Control Function 1
90. s Checks Measures Remarks Compressor Faulty Combo Check the resistance f resistance is infinite replace it does not Vlaue is defective with new one operate 2 3 Temperature Problems High temperature in the freezer compartment Causes Poor cool air circulation due to faulty fan motor Checks Lock Check resistance with a tester OQ short oQ cut Rotate rotor manually and check rotation Wire is cut Bad terminal contact Check terminal visually Fan constraint Fan shroud contact Confirm visually Fan icing Confirm visually Measures Remarks Replace fan motor Reconnect and reinsert Maintain clearance and remove ice Repair and or replace shroud if fan is constrained by shroud deformation Faulty fan motor due to faulty door switch operation ced button faulty operation Press button to check Faulty button pressure and contact Press button to check operation Door cannot press door switch button Check visually Confirm icing causes and repair Replace door switch Door sag fix door Door liner bent replace door or attach sheets Bad radiation conditions in compressor compartment Check the clearance between the refrigerator and wall 50 mm in minimum Check dust on the grill in compressor compartment Check dust on the condenser coils Keep clearance betwee
91. t leaks c After installing filter turn on household water supply M 03555 A i TDK 3 HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO ICE MAKER 3 1 Confirm the amount of water supplied to the icemaker 1 Pull out the ice bin shelf in the upper part of the freezer compartment Caution not put hands or tools into the chute to confirm the operation of geared motor It may damage the refrigerator or hurt your hands 2 Turn on the electricity after connecting water pipe 1 Press the test switch under the icemaker for two seconds as shown below 2 The bell rings ding dong the ice tray rotates and water comes out the icemaker water tube 3 The water is supplied into the tray two or three times The amount is small each time Put a container under the ice tray and press test switch 4 When the ice tray rotates the water in it will spill Collect the spilled water and discard it 5 When ice tray has finished rotation water comes out the water tube Check the amount that goes into the ice tray Refer to the drawing below The optimum amount is 110cc Almost 4 oz Confirm the amount of water Icemaker AS n 225 o 22 e 22 Too much gt gt 9 lt lt Ca Optimum level 777 Too little 2 oo o en e e 7
92. tment Foreign materials Adiabatics dump liquid temperature 5 No automatic operation faulty contacts 6 Condensation and ice formation Store hot food Store too much at once Door open Packages block air flow 2 Food storate 1 Faulty temperature sensor in freezer or refrigerator compartment Inspect parts measurements roa contact and check visually Faulty temperature characteristics 2 Refrigeration load is too much Food Too much food Hot food Frequent opening and closing Cool air leak Poor door close Partly opens 3 Poor insulation 4 Bad radiation High ambient temperature Space is secluded 5 Refrigerant leak 6 Inadequate of refrigerant 7 Weak compressor discharging power Different rating Small capacity 8 Fan does not work 9 Button is set at strong 1 in freeezer compartment External inflow Bushing installed incorrectly Door opens Weak door closing power but not closes Stopper malfunction Door sag Food hinders door closing Gap around gasket Contraction distortion loose door twisted corner not fully inserted Food vapor Storing hot food Unsealed food 2 Condensation in the refrigerator compartment Door opens Insufficient closing but not closes 1 Door sag Food hinders door closing Gasket gap 3 Condensation on liner foam Cool air leak Not fully EST
93. ton is placed on the main PCB of refrigerator test switch and the test mode will be finished after maximum 2 hours irrespective of test mode and then is reset to the normal status 3 Function adjustment button is not perceived during performance of test mode 4 In finishing test mode always pull the power cord out and then plug in it again for the normal state 5 If nonconforming contents such as sensor failure are found during performance of test mode release the test mode and display the failure code 6 Even if pressing the test button during failure code display test mode will not be performed 1 COMP ON 2 Drive FAN high speed RPM Under the TEST 1 if the Press test button once 3 Defrost and H bar TP Heater OFF test circuit is shorted freezing force mode 4 R stepping motor damper continuosly stay to keep All the BAFFLE opened the Test 1 5 All the Display ON 1 COMP OFF Cooling FAN OFF 2 Defrost Heater ON Defrosting Sensor 5 C Press test button once 3 H bar TP HEATER OFF Defrosting Heater ON at the test mode 1 4 R stepping motor damper Defrostin Sensor 5 C compulsory frost All the BAFFLE closed Return to the original removal mode 5 Only F R room NOTCH ON 22 22 status COMP is operated BETTER 1 Only F R normal LED Only after 7 minutes F R Notch normal LED ICE TYPE FREEZER REFRIGERATOR ICE PLUS Press test switch button once at the test to the initial status Comp is op
94. ulation Plate heater Melting fuse Sealing is broken Moisture penetration Cord heater Em damaged Moisture penetration Bad sealing Sheath heater CLAIMS 10 Structure appearance and others CAUSES AND CHECK POINTS HOW TO CHECK 1 Door foam m Sag Hinge loose Bolt is loosened during transportation Not tightly fastened Screw wom out Weak gasket Adhesion surface adhesion Fixed tape _ Not well fixed Noise during Hinge interference Bigger door foam operation Hinge Pin tilted Poor flatness No washer No grease Malfunction Not closed Interference between door liner and inner liner Refrigerator Stopper worn out compartment is Bad freezer compartment door opened when freezer assembly compartment is No stopper Closed faulty stopper 2 Odor Temperature of High Faulty damper control refrigerator Button is set atweak compartment Door is open interference by food Deodorizer No deodorizer Poor capacity Storage of fragrant foods Food Storage Seal condition Long term storage Others Odors from cleaners or items which shroud not be stored in a refrigerator 56 JG 2 Faults 2 1 Power Problems Causes Checks Measures Remarks No power on Power cord cut outlet Faulty connector insertion
95. y time is elapsed This circuit is to realize the functions such as ice ejection of icemaker cube mold ice full detection leveling Ice making temperature detection etc Refer to the temperature detecting circuits of Main PWB for Ice making temperature detection Icemaker test switch input detection is the same as the door switch input detection circuit of main PWB T It is to force to operate during operation test service and cleaning The test switch is mounted under the automatic icemaker The test function starts when the test switch is pressed for more than 1 2 second lest button does not work during ice ejection and water supply It works when it is in the horizontal conditions If cube mold is full of ice during test function operation ice ejection control and water supply control do not work lce ejection carries out regardless of ice formation in the ice making tray if test switch is pressed for more than 1 2 second Water will be splashed if test switch is pressed before the water in the mold is completely frozen Water will be supplied while the mold returns to the horizontal conditions after ice ejection Therefore the problems of ice ejection leveling and water supply can be checked by test switch When test function performs normally buzzer sounds and water supply shall carry out Check it for repair if buzzer does not sound When water supply is completed normal cycle works Icemaking gt Ice Ejection gt Lev

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