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Service Manual - Appliance Factory Parts

1. H BAR PART H BAR HEATER DOOR S W CAPACITOR PART FUSE PART PLUG TYPE COMPRESSOR EARTH PART ICE amp WATER VALVES PILOT VALVE S W PART OPTICHILL ZONE WATER TANK SENSOR ON CIRCUIT DIAGRAMS ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITIES AND ACCORDANCE WITH MODEL TYPE N NEUTRAL PCB ASSEMBLY MAIN WATER TANK CON6 CON2 HEATER BL 12 7 BL N Bog ME H MOTOR BLDC alae DEF HEATER lel 8 3 Bb FUSE MELTING 7 2 72 F DOOR OPEN RD 6 1 ENG PERCEPTION RD 5 DEFROST SENSOR EE BEN F SENSOR SEONI DISPENSER CGA 1 9 RD BL N 8 CON8 7 BL BL N ICE MAKER MOTOR in Pi 5 BN HEATER 4 CORD H BAR H BAR PARTS er x 3 YL BL N ICE MAKER m BK 6 E ares neueren TEST S W BN 5 1 WH Si TIGEMAKER FA DISPENSER LAMP PART STOP S W BO 3 PR BL N ICE MAKER SENSOR 5 N s BL N DISPENSER LEVER S W 13 0 O RD RD 12 R DOOR T di F DOOR STEPPING YL 11 on ME IE SWITCH SWITCH BL 9 PK BO BRD GY 8 R2 SENSOR wl RI SENSOR alb BD ONE BLN R H BAR DOOR BO 4 10 B OPEN PERCEPTION sB MOTOR ES HEATER SHEET FR 8 M 7 WH N DAMPER x PR SOLENOID UBE 5865 i HEATER SHEET DONE ERES poka ee WH N PCB ASSEMBLY DISEDOOH PK 6 3 BN x IC
2. 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 E 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 58 cO 2 Faults 2 1 Power Problems Causes No power on Power cord cut outlet Faulty connector insertion Faulty connection between plug and adapter Checks Check the voltage with tester Check visually Check visually Measures Replace the components Reconnect the connecting parts Reconnect the connecting parts
3. 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 Parts misuse Charge of temperature Impact characteristics 9 Food storing place Near the outlet of cooling air Check visually after disassembly Check visually after disassembly CLAIMS CAUSES AND CHECK POINTS HOW TO CHECK 4 Warm 1 Colgged cooling path refrigerator r Adiabalics liquid leak compartment Foreign materials Adiabatics dump liquid temperature 5 No automatic operation faulty contacts 6 Condensation and ice formation Store hot food Store too much at onc
4. Sensor Cold storage sensor amp 2 F Frost removal sensor Outside sensor 20 C 4 F 22 3 kO 77 15 C 5 F 16 9 kO 60 kQ 15 C 14 F 13 0 kQ 47 3 5 C 23 F 10 1 kO 38 4 kO 0 C 32 F 7 8 KQ 30 kO 5 G 41 F 6 2 24 1 10 C 50 F 4 9 kO 19 5 15 C 59 F 3 9 kO 15 9 kO 20 C 68 F 3 1 kO 13 25 C 77 F 2 5 11 30 C 86 F 2 0kQ 8 9 409 104 F 1 4 kQ 6 2 kQ 50 C 122 F 0 8 kO 4 3 kO pResistance value allowance of sensor is 5 gt 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 gt 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 after separating CON8 of the PWB ASSEMBLY and the MAIN part Resistance of the freezing sensor shall be measured with a digital tester after separating of the PWB ASSEMBLY and the MAIN part 27 lt 2 PWB parts diagram and list 2 1 PWB Assembly main part diagram q U w L TIIITI 4 6871JB1349 do r k m 38 2 2 PWB Display 17 5 gt e EN ER O LED DISPLAY 2
5. 27 Too much gt e gt lt Ca Optimum level S J Too little oo o en e e e e 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 at least three minutes before removing the main PWB cover 310 Volts are presentin 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 Driver switches TA Water Supplying Time Control Option SWITCH x sw SW WATER SUPPLY TIME NOTE or w se on or ss 1 The water supplying time is set atfive seconds when the refrigerator is deivered 2 The amountofwater 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 amountofwater supplied adjust step by step Otherwise the water may spill over Switch ON Switch OFF 3 When the adjustment of the control switch for the amount of water supplied is complete check the level of water in the
6. 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 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 Check 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 83 Problems Checks and Measures Sounds of water flowing Explain the flow of ref
7. 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 pressurized 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 78 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 refrige
8. LG REFRIGERATOR CAUTION PLEASE READ THE SAFETY PRECAUTIONS OF THIS WANUAL CAREFULLY BEFORE REPAIRING OR OPERATING THE REFRIGERATOR MODELS LSC27910SW 01 LSC27910ST 01 LSC27910TT 01 LSC27910SB 01 ECN Engineering Change Number Rev 01 Change Base Compressor due to Back Prone Loading transportation Items related to this change e Damper Compressor 312A e Stopper Compressor 314A Assembly Compressor 315A CONTENTS WARNINGS AND SAFETY PRECAUTIONS 1 3 LL SPESGIFICATIONS contends EOM PEAR Eu TRU tes Urdu tesa UV Ma Em E UP sa 4 2 PARTS IDENTIFICATION ea 5 3 HOW TO INSTALL THE REFRIGERATOR 6 4 HOW DISASSEMBLE AND 10 S MICOM TUNG TION solas dida 15 6 EXPLANATION FOR MICOM CIRCUIT 25 7 ICEMAKER AND DISPENSER WORKING PRINCIPLES AND 42 SZCIRCU uer LEE 48 9 TROUBLE DIAGNOSIS euer 49 10 EXPEODED VIEW een 88 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 w
9. N P eo D N The dispenser allows ice and water to be served without opening the freezer door Press the dispenser switch the rubber button after selecting crushed ice cubed ice or water The dispenser door will open automatically It will close automatically 5 seconds after dispensing is completed and you will hear the CLICK The dispenser will not operate when the freezer door is open The ice dispenser will automatically stop after 3 minutes even without an OFF signal The ice door will close automatically 5 seconds after that and you will hear the CLICK Dispenser Lamp ON OFF Function The dispenser lamp is operated in conjunction with the dispenser switch It comes on when ice or water is dispensed and turns off when dispensing is completed Selection function of water crushed cube ice 1 This allows the selection of water cubed crushed ice Press the button to cycle through WATER gt CRUSHED CUBED 2 At initial power on the dispenser defaults to CUBED ICE 3 When CUBE ICE is selected the geared motor rotates so CUBED ICE is dispensed 4 When CRUSHED ICE is selected the geared motor rotates in the opposite direction so CRUSHED ICE is dispensed Water dispenser function 1 Select WATER to dispense water 2 The water line is a direct connection to the household water supply If water is selected at the dispenser a solenoid opens and allows water to flow A similar solenoid is operated in conju
10. explanation Defective fan motor normal it is OK Replace fan motor driving relay Replace relay RY5 amp RY6 or PCB Faulty defrost Refer to faulty defrost items in trouble diagnosis Refer to trouble functions diagnosis function s T 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 formation 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 Refe
11. Loosened stopper cord Heater cord L Not touching the evaporator pipe Location of assembly top and middle short defrosting time Defrost Sensor Faulty characteristics Seat D missing location thickness Structural fault Gasket gap Air inflow through the fan motor _ Bad insulation of case door No automatic defrosting Defrost does not return 3 Cooling air leak r Bad gasket adhestion Gap Bad attachment Contraction Door sag Bad adhesion Weak binding force at hinge 4 No cooling air circulation Faulty fan motor Fan motor m 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 52 CLAIMS CAUSES AND CHECK POINTS HOW TO CHECK 3 Refrigeration is weak 4 No cooling air circulation m Faulty fan motor Fan is Fan shroud contact Clearance constrained Damping evaporator contact Accumulated residual frost Small cooling air Insufficient Fan overload Fan misuse discharge motor RPM
12. Remarks Fuse blows out Short circuit by wrong connection Low voltage products are connected to high voltage Short circuit by insects Electricity leakage High voltage Short circuit of components tracking due to moisture and dust 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 OQ it is shorted 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 penetration 2 2 Compressor Problems Causes Checks Measures Remarks Compressor Faulty Combo Check the resistance If resistance is infinite replace it does not Vlaue is defective with new one operate If it is not infinite it is normal Check other parts Compressor is frozen If compressor assembly parts are normal capacitor PTC OLP apply power directly to the compressor to force operation Auxiliary MING a Power OLP It starts as soon as it is contacted 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 09 2 3 Te
13. 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 compartment 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
14. during welding Use R134a exclusive and remove for R134a refrigerant moisture Drier replacement P Replace drier whenever from pipe repairing refrigerator cycle piping Check oil leak at refrigerant leak area Use electronic leak detector if oil leak is not Do not use soapy water found for check It may be Detect refrigerant leak area The electronic leak detector is very sensitive to sucked into the pipe halogen gas in there It also can detect R141b in urethane Please practice therefore many times before use Leak check 76 Process 3 2 Summary Of Heavy Repair Contents Tools Trouble diagnosis Remove ls Residuals Parts replacement and welding Cut charging pipe ends and discharge refrigerant from drier and compressor Use R134a oil and refrigerant 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 2 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 le
15. part turns off Note 2 Freezer notch temperature display and refrigerator notch temperature display Failure code indication part are normally indicated in abnormal ambient sensor andEr indicated on the ambient temperature display except for the ambient temperature display other LEDs or LCDs are indicated normally LCD LED check function If simultaneously pressing express freezer button and freezing temperature adjustment button for a second the back light is turned on and all display LCD LED graphics on If releasing the button the LCD LED graphic displays the previous status the back light is turned off LCD graphic and back light ON OFF check D 2 15 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 Test button is placed on the main PCB of refrigerator test switch and the test mode will be finished after maximum 2 hours regardless 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 Always wait at least 3 minutes before restarting a compressor to allow the pressures to equalize and to avoid damage 5 If nonconforming contents such as sensor failure are found during performance of test mode release the test mode and display the fail
16. 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 OK 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 m R Resistance of tester Q 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 the 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 t
17. Bushing S Capillary tube unattached 55 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 Bad connection Partly damaged Condenser drain sound T Not connected Bad pipe caulking 2 Freezer compartment sounds Fan motor sound Normal operating sound Vibration U Aged rubber seat Bad torque for assembling motor bracket contact Shroud burr contact Damping evaporator contact Residual frost contact Damaged heater cord n Narrow evaporator interval Sounds from fan I Fan guide contact Unbalance fan sounds Unbalance Surface machining conditions Fan distortion Misshappen Burr Ice on the fan Air intake opposite to motor bushing assembly Motor shaft TL 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 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 co
18. Frame such as butter and cheese water Filter pia Ice amp Water Dispenser Button 3 HOW TO INSTALL THE REFRIGERATOR 1 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 _v 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 neue Adjust the level when the refrigerator door is lower than the freezer door during the installation of the refrigerator Tools you need Wrench 5 16 in 8 mm Wrench 3 4 in 19 mm Height difference I Keeper nut Height s a hinge pin Down 4e Using 4 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
19. 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 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
20. Using a short screw driver loosen one SCREW in DRAIN ASSEMBLY PIPE Z and one connected to the 2 After inserting pull out tube to check if it is properly COVER MOTOR inserted Disassembly 1 Pull out tube while pressing collets and disassemble it Assembly 1 Insert tube until you can see only one line DRAIN ASSEMBL PIPE Z COVER MOTOR Collet Tube Insert Line 2 Pull and separate the FAN ASSEMBLY and MOTOR in counter clockwise based on the MOTOR SHAFT FAN ASSEMBLY MOTOR 3 Lock the water being supplied Then separate the Water Connection connected to the Water Valve The assembly is in the reverse order of the disassembly and take special care for the following details 1 Be careful not to bend the tube during assembly 2 Press the WATER DISPENSER button until water pours out and check for leakage in the CONNECTOR TUBE It differs by the water pressure but usually takes about 2 minutes until water pours out 13 7 DISPENSER 4 Loosen four screws with a phillips screwdriver and pull 1 Disconnect funnel and button assembly by pulling down Bio PUM ta sconneet and forward Funnel Assembly Funnel Assembly Button 5 The Duct Cap Assembly can be disconnected if the hold lever connecting screw is loosened with a phillips driver 2 Remove the Display Frame moving out with both hands in one side and make
21. 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 Z T Grille fan U IceMaker Bracket Housing A IN NY 5 CN NG NZ A x Sensor a A te 7 7 ING NA N S Ne Gr x YA A GN w N AO ANN VN NN NK ANNO AA INN AA 7 7 ON M YN 4 CN X A ZU Sensor Cover 2 404 W N A V AA INN UA wir N ja V Y NAS N NOTE If the ice tray mold is not horizontal after repair and assembly something must be wrong Check it and reassemble if necessary VEY C A WS AW DY ES Grille fan L 5 WATER VALVE DISASSEMBLY 4 Separate the Cover Back M C and Valve Screw 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 6 FANAND FAN MOTOR DISASSEMBLY METHOD 1
22. converts operation to the standard RPM However if opening doors of freezing room or home bar 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 locked or fails 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 doesnt operate more If you want to operate the BLDC motor turn off and on power resource 2 7 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 18 2 8 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 freezer refrigerator or home bar opened 2 After the door has been open for one minute the buzzer sounds for 1 2 second and then sounds three times every 30 seconds 3 If all doors are closed when the alarm sounds it is cancelled immediately Doors of freezing cold storage room Closing Opening Closing Opening Closing or home bar Times 3 Times 3 Times 3 Times BUZZER lt 30 30 30 Within 1
23. 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 9 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 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 functio
24. nonscratching m surface 7 Place the door inside facing up on a nonscratching surface FN 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 e Pull up the water feed tube while pressing area Figure 1 as shown in the figure below e NOTE If 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 Fe
25. 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 reverse 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 Ice 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 The 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 gt Ejection Mold Returns to Horizontal Maximum tilting point not full HALL IC ON Ho pp SIGNALS OFF Bin is D full HALL IC ON OUTPUT 1 SIGNALS OFF ICE CHECKING LEVEL 30 Ho TEM 8 0 10
26. 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 87 EV 10 EXPLODED VIEW FREEZER DOOR EV EXPLODED VIEW REFRIGERATOR DOOR 89 EV EXPLODED VIEW FREEZER COMPARTMENT 7 2 N EA ND BETONT CA KxWe amp a A ANN CARN AV A AY AN NN 2 2 N N AN 7 INA N ES SONNEN NU ES OQ REFRIGERATOR COMPARTMENT EXPLODED VIEW EV KAM LLY 7 7 SN 6 91 EV EXPLODED VIEW ICE amp WATER PARTS 92 EV EXPLODED VIEW MECHANICAL COMPARTMENT SVC KIT COMPRESSOR S 8 O SOS 0 OX 8 Ww Y WA NS WAR ESS SA N AUE S NL w N amp A 93 EV EXPLODED VIEW DISPENSER PARTS 94 EV SERVICE K
27. the same process in the other side and pulling it forward like shows the picture Solenoid Assembly Duct Cap Assembly 6 To install the Duct Cap Assembly insert one end of the spring into the right hole of the dispenser lever and insert the other end into the right hole in the top part of the dispenser Then attach the holder at the solenoid Switch 3 The Display Assembly can be connected by pressing the top of the Dispenser Cover and pushing it after separating the Display Frame from its housing 14 5 MICOM FUNCTION 1 MONITOR PANEL 1 1 Display Second Function ICE DISPENSER FRZ TEMP COLDEST REF TEMP FILTER LIGHT risus FLTER RESET 4 e 5 q CUBE C E ej wa e SA d ON Qu Ae e ICE PLUS DISPENSER FREEZER REFRIGERATOR FILTER LIGHT LOCK ssecs e Buzzer sound Display Power Saving Mode mute Mode 1 Buzzer sound mute Mode The buzzer sound is set to OFF It activates by sounding the recognition sound of Ding after pressing and holding ICE PLUS button more than 5 seconds It inactivates when resetting the mode power 2 Display OFF mode Display off mode puts the display into standby mode until the door is opened To put the display into Display off Mode press and hols the FRZ TEMP and ICE PLUS buttons simultaneously for 5 seconds until the Ding sounds Use both buttons for this to work When Display off Mode is activated th
28. 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 of Y 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 the cover and pulling cover to the front 3 IMPORTANT Turn off household water supply 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 2 For subsequent installation remove old filter by slowly turning it to the left a quarter turn and pulling it down ScD KaKO SIT V CARO ZEN 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 EE After installing
29. water filter a Replace the cover lamp and shelf to the initial position b Dispense 2 5 gallons 9 46 L of water to purge the system dispense for approximately 5 minutes Open the refrigerator door and check the shelf area for leaks c After installing filter turn on household water supply 3 HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO ICEMAKER 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 Do 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 eL A 22 e
30. 3 5 C 5 6 2 7 F 1 89 F 0 9 F 0 99F 1 8 F 2 7 F 3 69 F 4 5 F b 4 F 6 3 F Down Down Down change Up Up Up Up Up Up Up 2 C 1 5 1 C 0 5 C No 0 C 1 C 15 2 C 25 C 3 C 8 2 3 6 F 2 7 F 1 8 F 0 99F 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 25 C 2 C 15 C 1 C 05 C No 05 C 1 C 1 5 C 20C 25 C 10 4 5 F 3 6 F 2 7 F 1 8 F 0 9 F 0 99F 1 89 F 2 7 3 6 F 4 5 F Down Down Down Down Down change Up Up Up Up Up 3 C 2 59 2 C 15 C 1 C 05 C No 0 5 C 1 C 1 5 2 C 12kQ 5 4 F 4 5 3 6 F 2 7 F 1 8 F 0 9 F 0 9 1 8 F 2 7 F 3 6 F Down Down Down Down Down Down change Up Up Up Up 35 C 3 C 25 C 290 1 590 1 C 0 5 No 0 5 C 1 C 1 5 C 18 KQ 6 3 F 5 4 F 4 5 F 3 6 F 2 79F 1 8 F 0 9 F 0 9 F 1 8 2 7 F Down Down Down Down Down Down Down change Up Up Up 4 C 3 5 C 3 C 25 C 2 C 15 1 C 0 5 C No 0 5 C 1 C 33 7 2 F 6 3 F 5 42F 4 5 F 3 6 F 2 7 F 1 8 F O 9 F 0 9 F 1 8 F Down Down Down Down Down Down Down Down change Up Up 45 C 4 C 359 3 C 25 C 2 C 15 C 1 C 0 5 C No 0 50 C 56 8 1 F
31. 4 00MG03 1 x 10 Ei ie T 1 a A KIA7042 cov 2 T Ros gy R73 e R74 R75 BR93LC46RF W R26 1K 40 E 38 ano VDD Varef Vss Vass 2 TEST P70 AIN10 Pn an P72 2 P73 AIN13 P74 P75 AIN15 TOSHIBA TMP87C841N IC1 141 pos XIN XOUT RESET AINO R76 47K 4 7K 47K 4 7K Part 2 OPTION 4 zs M p s 1 23 1 HEATER SHEET ges DUCT DOOR 1 4 foci L IC13 5 1104 1 10 MS4563FP 4K 4 gt 13 2 360 1 2W 5 D D103 1N4148X6 SW102 SW106 P67 AINT TOSHIBA TMP87C841N IC1 g OPR 1 RTZ P61 me F SENSOR n D SENSOR F DOOR SW px 1 1 1 1 1 1 1 P54 1 CFANPWM 1 i 1 I P51 i CFANLOCK OPTION 1 P53 F FAN PWM P50 F FANLOCK DAMPER HEATER OPTION HIBAR DOOR SW 1 ppt AAC ne P62 NN P63 M 9977 CE MAKER SENSOR n ICE MAKER STOP SW ICE MAKER TEST SW 7 LE e 8 AK Foward 5 a ee al ICE MAKER BA6222 223 100V MOTOR E Tal a 23 um 44 7 ICEMAKER AND DISPENSER WORKING PRICIPLES AND REPAIR 1 Working Principles 1 1 ICEMaker Working Principles Power Input Level Icemaker Cube mold for Initial Control after power is input Initial Control
32. 41 53 58 160 170 Lock Icemaking Ice Checking Ice Ejection Lock Original point 2 sec Horizontal Level Retrun Conditions Conditions 44 2 5 Test Function 1 It is to force the operation 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 lt 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
33. 5 a z DESCRIPTION SPEC MAKER REMARK G8z0JB8212A PWBPCI TOWPJTLED DISPLAY 9870899128 PWBIPCBI OW PJT LED DISPLAY VER IN A CSS ANN rss Hr APA EAS a NAME PLATE gt BEZ EN 1 gt CONNECTOR CIRCI WAFER SMN250 YECNHO ICP 2 5MM STRAIGHT SN YEON HD CONIOI L 110 11 6 6 005414B09AB DIODE SWITCHING RLS4148 ROHW LLDSILL 341 75V NA 4NSEC 450MA RDHM DIOI 106 13 14 0148 LED LT5221 41 GREEN LEDTECH 10 10 LED LT5221 81 HE BCM GREEN LEDTECH 001 105 107 11 15 SED LIO6 112 117 7 7 16 LED LT0521 81 BCV LEDTECH LIO6 112 117 JPT1139A JEIL 12V0C 50MA SMD JEIL SWIOI I06 6 6 17 RRTOOSA SWITCH TACT KPS 1105AM DIODE RECTIFIERS IN4CC4 4CCV 1 1V 5UA 30A D041 TP ZP ACTRONIX 1 6 18 400 CC4 4CC SUA 30A DO DI07 D11Z D107 gt 39 o E LO 2 3 PWB Main Assembly Part 1 BD1 Hv D3SBA60 R3 PRC E 56K 2W RAPRC 560K 1120 32mH CM2 220nF 275VAC RIIPR0 33K iW KIA431 R6 5 680 1 4 2 FUSE1 221 2KV 250V 15A TAB 2 COS KID65003AF ALE15812 OPTION SWITCH DISPENSER LEVER S W SOLENOD DISPENSER 0 1uF 120 I250VAC Do Dn TLP762JF IN4007 IC7 1 Q Le RY13 KIDESOOBAF 1 o 55540 a y 4K 8 CSTS
34. 6 kQ 2 C 3 6 F 5 6 kQ 1 0 C 1 8 oF 3 3 kQ 3 C 5 4 F 3 3 kQ 1 5 C 2 7 F 2 kQ 49 C 7 2 F 2 kQ 2 0 C 3 6 F 470 Q 5 C 9 F 470 Q 2 5 C 4 5 F Cooler el emperature compensation table by adjustment value difference value against current temperature Ex If you change compensation resistance at the refrigerator RCR1 from 10 current resistance to 18 modified resistance the temperature at the refrigerator will increase by 1 C 1 8 F 34 elemperature compensation table at the refrigerator is as follows Modification Ra 4700 2kQ 3 3kQ 5 6kQ 8 2kQ 10kO 12kQ 18kO 33kQ 56kQ 180kQ resistance No 0 5 C 1 C 15 C 2 25 3 C 35 C 4 C 4 5 5 C 4700 0 9 1 8 2 79 F 3 60F 4 5 F 5 4 F 6 3 F 7 2 F 8 1 F 9 F change Up Up Up Up Up Up Up Up Up Up 0 5 C No 0 5 C 1 C 1 590 2 C 2 59 3 C 359 4 C 45 2kQ 0 9 F 0 9 F 1 8 F 2 72F 3 6 F 4 5 F 5 4 F 6 3 F 7 2 F 8 1 F Down change Up Up Up Up Up Up Up Up Up 1 C 0 5 C NO 0 5 C 1 C 11 5 C 20C 25 C 3 C 3 5 C 4 C 3 3 1 8 F O 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 59 No 05 G 1 C 1 590 2 C 2 5 C 3 C
35. 7 2 F 6 3 F 5 4 F 4 5 F 3 6 F 2 7 F 1 89F 0 9 0 9 F Down Down Down Down Down Down Down Down Down change Up 5 C 45 C 4 C 3 5 C 3 C 25 C 29 1 5 1 C 0 5 C No 180 9 F 8 1 F 7 2 F 6 30 5 4 F 4 5 F 3 6 F 2 7 F 1 8 F O 99 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 e 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 35 Key Button Input amp Display Light On Circuit The circuit shown determines whether a function control key on the operation display is pushed It also turns on the corresponding function indication LED DISPLAY The drive is the scan type OPTION HEATER SHEET p e DUCT DOOR i 4d M54563FP D101 y D102 y D103 Y D104 w D105 p D106 X inaraexe O O O yO yo sw101 P sw1o2 P sw1o3 7 sw104 Y sw105 sw106 ICE PLUS DISPENSER FRZ TEMP eie REF TEMP FILTER LIGHT LOCK 3secs e C FILTER RESET HOLD 3SECS e C LIGHT D o 36 2 Sensor resistance characteristics table Measuring Temperature Measuring Temperature
36. E Sur BL N SB 5 2 yla 1 Pk WATER Ne WH N Ei A TN A CON101 IRDA xx x BL N eH BL 1 PILOT 2 SOLENOID EK 3 VALVES IRD N8I S gt ae C FAN MOTOR AC M PR 6 PR 11 5 WH 10 CON1 3 8 4 IBN 2 BN 7 2 IRD 1 6 R LAMP BL N SR a ogg pe NOUH Died en LB BK U U gr ee WATER TANK 3 6 NO 7a x CAPACITOR x OPTIONAL 8 BLN E FUSE PART z Wy ED _ BL N Bo PLUG TYPE 250VAC 15 5 J H BAR DOOR sg ARAS 65 30 SWITCH L m BL N B COMPRESSOR PTC BO GN YL GN EARTH PART ASSEMBLY BL N BK BLACK GN GREEN GY GRAY GN YL GREEN YELLOW YL YELLOW PK PINK WH WHITE BL WH BLUE WHITE SB SKY BLUE BO BRIGHT ORANGE BL BLUE BK WH BLACK WHITE BN BROWN PR PURPLE RD RED RD WH RED WHITE 48 9 IROUBLE 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 re dista The dista The thick The dista Pin outer The Inner diameter of adapter nce between 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 Faul
37. ITS 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 Description Loc No Part No Description Reason 307B ACF67062310 Compressor Assembly 3550JA2042C Cover PTC 6877 B2040H Harness Assembly In order to use it with objective to has the option of MGE58810302 oint request it for a future compressor change and make MJB61877901 Stopper Compressor interchangeable This kit is complety interchangeable For all production TCA30358201 Compressor Set Assembly oe compressor model found for LSC27910 6748C 0002C Thermistor Assembly PTC 6750C 0004R Overload Protect 95 LG Electronics Inc MFL62215907 OCTOBER 2009 REVIEW 01
38. SPENSER OTO CU WATER S S Measuring part IC6 11 IC6 10 IC7 15 IC7 13 ON Within 1 V otatus OFF 12 V 2 Lever Switch sensing circuit Measuring part IC1 MICOM No 16 Lever S W 5V ON Press 60 Hz OV OFF 5V 28 3 Door opening sensing circuit R CONO R35 2K EN 2K F DOOR S W 223 CON R52 PSI fi 0C20 R DOOR S W 223 T Measuring part nr IC1 MICOM No 44 45 45 46 47 48 Pin Door of Freezer Refrigerator Closing 5 V 8 Switch at both ends are at OFF status Opening 0 V Switch at both ends are at ON status Since door switches and B are interconnected if either fails the other will not respond properly If either switch fails the light will not come on 29 1 5 Temperature sensing circuit CONS RTI IOKF 4 GN 2 50V R32 P67 CCI2 223 I 2 E P6l AINI CC32 a CONG en b 0 F SENSOR AING 50N RF I6 2KF gt qm POS D SENSOR AINS ries RI SENSOR P63 AIN3 R2 SENSOR The circuits involving the freezer and refrigerator sensors control the temperature in both the freezer and the refrigerator The Icemaker sensor detects when ice is made The defrost sensor determines both the need
39. Shelf Tray meat Egg Bank Basket Quantity Lamp Shelf MODELS LSC27910SW LSC27910ST LSC27910TT LSC27910SB Embo normal Vista A LG 3 full 1half AUTO ICE MAKER SPACE PLUS Yes Yes 1 40W Blue 1 Fix 2 S Out Yes No 3 Plastic Yes 1 40W Blue 912 mm 3529 32 in 908 mm 3511 4 1 3 EA Wire N ol O O 00 A E 4 N O O N ODIN Top 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 Freezer Shelf Refrigerator Lamp Ice Bin For storage of ice cubes made by the icemaker Refrigerator Shelf Do not store anything except ice in the ice bin Freezer Lamp snack Pan For storage of meat or fresh food Freezer Door Rack Refrigerator Door Rack Drawer 0 Vegetable Drawer PWB Cover Dairy Corner For storage of dairy products Display
40. WIRE TO FAN CONTACT OF STRUCTURES WITH FAN SHORTOR OPEN OF LEAD WIRE ABNORMAL FREEZING BLDC MOTOR THERE IS NO SIGNAL OF BLDC MOTOR MORE THAN 65 SECONDS IN OPERATION OF FAN MOTOR NORMAL DISPLAY ABNORMAL ICEMAKER SENSOR NOTE 1 senson shoaroncuT MAKER SENSOR SHORT CIRCUIT FAULTY ICEMAKER UNIT MOTOR OR HALL IC ABNORMAL ICEMAKER UNIT AME LEAD WIRE SHORT CIRCUIT FAULTY MOTOR DRIVING CIRCUIT Note1 R2 sensor OptiChill sensor and water tank sensor Ice maker sensor Ice maker Unit are not indicated on the failure indicating part but indicated in checking Display When pressing for more than the button of freezing temperature and super freezer button for more than 1 second R2 sensor middle room m Normal LED or LCD graphic on the C part turns on or Abnormal Drive Micom Abnormal LED or LCD graphic on the C part turns off Communication OptChill sensor or m Normal LED or LCD graphic on the D part turns on Water tank sensor A LED or LCD hi the D tt ff bnorma or LCD graphic on the D part turns o Theater LED or Icemaking sensor mE Normal LED or LCD graphic on the E part turns on LCD Graphics Abnormal LED or LCD graphic on the E part turns off Turn On Icemaker unit Normal LED or LCD graphic on the F part turns Abnormal LED or LCD graphic on the F part turns off Ambient sensor E Normal LED or LCD graphic on the G part turns on Abnormal LED or LCD graphic on the G
41. When water supply is completed normal cycle works Icemaking gt Ice Ejection Level Return Water Supply 5 If icemaker stop switch is set to ON normal cycle operates Icemaking Ice Ejection Level Return Water Supply If is set to OFF ice making conducts but ice ejection level return and water supply do not work 47 8 CIRCUIT
42. actuator Each graphic is indicated for the selected function You ll hear a CLICK when the ice door closes 5 seconds after ice is dispensed Pressing REFERENCE Hold your cup in the dispenser for a few seconds after Switch dispensing ice or water to catch the last few drops or pieces of 1 ice 2 3 ICE PLUS Please select this function for prompt freezer e Function is repeated folloing below whenever pressing ICE PLUS arrow mark graphic remains at the On status after flickering 4 times when selecting Special Refrigeration ICE PLUS e PLUS function automatically turns off if a fixed time passes ICE PLUS ICE PLUS 2 4 Dispenser Light Dispenser switch or dispenser light button turn the dispenser light in the dispenser on and off The dispenser light Function is repeated following below whenever pressing LIGHT FILTER button If dispenser light continuously turns on more than 7 minutes with dispenser light button the dispenser light turns off automatically by compulsion LIGHT 0 0 17 2 5 ICE PLUS 1 Ice Plus increases the cooling speed in the freezer by running the fan and the compressor simultaneously 2 Ice Plus is released if the power fails and is restored 3 The temperature setting is not changed when Ice Plus is selected 4 You can change the temperature in the freezer and the refrigerator even if Ice Plus has been selected and is in progress 5 The refrigerato
43. ak 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 u 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 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 77 3 3 Precautions During Heavy Repair Items 1 Use of tools 2 Recovery of refrigerant 3 Replacement of drier
44. all outlet and wait for more than three minutes before replacing PWB 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 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 dedicated circuit for the refrigerator 5 Be sure the outlet is grounded This is particulary important in wet or 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 t
45. and power freezer key are pressed at the same time for more than one second PCB circuit in circuit explanation Problems Symptom Causes Checks Measures Remarks Bad cooling Freezer Compressor does Compressor Lead Wire Check compressor Lead Wire Reconnect Lead temperature is not start is cut with a tester Wire high Defective compressor Measure voltage at PCB CON2 Replace relay RY1 Refer to load driving relay 3 amp 9 after pressing main PCB and RY2 or PCB driving circuit in test switch once It is OK if circuit voltage is normal explanation Defective freezer Defective Freezer Check resistance of freezer Replace freezer Refer to sensor sensor parts sensor with a tester sensor resistance characteristics table of sensor in circuit Refer to tables to page 29 The wrong sensor Confirm the color of sensor in Repair main PCB explanation has been installed circuits main PCB sensor sensor housing Order by model number housing and part number Defective freezer fan Fan motor lead wire Check fan motor lead wire Reconnect lead motor is cut with a tester wire Defective door switch Measure the voltage between Replace door Refer to load freezer refrigerator PCB power blue line and fan switch freezer driving circuits in home bar motor after pressing test switch refrigerator and circuit Defective fan motor of Main PCB If the voltage is home bar
46. anged 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 applied 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 43 2 4 Ice Ejection Control Function 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
47. anical area by opening valve for the set time Water supply automatically stops when water supply 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 1 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 2 Test 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 3 Ice 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 4
48. atically set to MEDIUM HIGH if the icemaker is set to ON 2 1 1 Lock Function dispenser and display button lock 1 In power application of refrigerator the LOCK text is turned off at the right side of lock graphic of display with the lock release status 2 If you wish lock the controls push on the ALARM LOCK button for more than 3 seconds after this time the LOCK graphic on the display will be turned on 3 The buzzer sound and control panel and dispenser function is not performed even if pressing display button ather than lock key in the lock status 4 If you wish unlock the controls press the ALARM LOCK button more than seconds The LOCK graphic on the display will be turned off LOCK LOCK ssecs 16 2 1 2 Filter condition display function 1 There is a replacement indicator light for the water filter cartridge on the dispenser 2 Water filter needs replacement once six months 3 Water filter light and FILTER RESET HOLD 3 SECONDS text turn n to tell you need to replace the filter soon 4 After replace the filter press and hold the lock button more than 3 seconds Then water filter light and FILTER RESET HOLD 3 SECONDS text turn off with reset status FILTER RESET HOLD 3SECS 2 2 Dispenser use selection You can select water or ice DISPENSER Please select water cruched ice and cubed ice by pressing the O button DISPENSER as you desire Use your cup to press lightly on the
49. be clogged 2 Manually check whether hot line pipe is warm If it is warm OK If it is 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 If fan is disconnected check fan damage and reassemble it Refer to fan motor disassembly and assembly sequence 0 2 5 Defrosting failure Problems Causes Checks Measures 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
50. both ends 9 10 of ice ejection motor of CONSO between 18 and 22 Replace Main PWB No e 15 ice ejection motor drive circui IC11 and peripheral circuits normal e Defects between Hall IC and Board Pin No 42 of IC1 e Confirm 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 CON9 test switch open e Defects between test switch Yes and board Pin No 38 of IC1 e Are both ends 3 4 of CON9 icemaker stop switch short No Poor water supply Replace water supply valve e IS 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 46 4 Icemaker Circuit P64 CONG AIN4 pem ICEMAKER SENSOR 3 ICEMAKER STOP S W ICE MAKER TEST SW T M ICE MAKER BAG222 223 1001 MOTOR 27 3 CC28 9 The above icemaker circuits are applied to LSC27910 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 mech
51. cedure 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 84 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 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
52. e 86 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 e A small hole in the door liner is for releasing gas during insulation materials lining work With a releasing hole forming 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
53. e Door open Packages block air flow 2 Food storate 1 Faulty temperature sensor in freezer or refrigerator compartment Inspect parts measurements pr 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 E 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 Ice in freeezer compartment External air 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 I Door sag Food hinders door closing Gasket gap 3 Condensation on liner foam Cool air leak Not fully table transmitted Out plate Ref Lower part Flange gap Not sealed Gasket gap 54 CLAIMS CAUSES AND CHECK POINTS HOW TO CHECK 6 Condensati
54. e display remains OFF unless a door is opened or a button is pressed The display will return to the OFF position after 30 seconds inactivity To remove the display from Display off Mode press and hold the FREEZER and ICE PLUS buttons simultaneously for 5 seconds until the Ding sounds The Display off Mode default setting is OFF after a power interruption 45 2 DESCRIPTION OF FUNCTION 2 1 FUNCTION OF TEMPERATURE SELECTION Division Base 1st Press 2nd Press 3rd Press 4th Press 5 5 Setting 4 4 temperature 2 2 1 1 MPE Medium Medium High Low Medium Low Control Freezer Control 2 F 5 F 7 F 1 F Refrigeration 46 F 41 F Control The temperature can vary 3 C 26 6 F 37 4 F depending on the load condition Press the button to cycle through the settings in this order Medium Medium High gt High Low Medium Low e The temperature displayed is the SET temperature NOT the actual temperature inside the refrigerator The actual temperature varies depending upon the temperature of items put into the refrigerator and other variables It takes the refrigerator a while to get down to the set temperature from the initial power on Wait at least 24 hours after initial power up to put food into the refrigerator If the temperature is unsatisfactory adjust it and wait 24 hours It may take three or four days to get the adjustment to your satisfaction The freezer is autom
55. eWait 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 reverse direction and eject ice into the ice bin if ice bin is not full e Conduct 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 gt ice ejection water supply control steps u U Vv Z U 1 2 Dispenser Working Principles 1 This function is available in Model LSC27910 Refer to appendix where water and ice are available without opening freezer compartment door 2 Crushed Ice is automatically selected when power is initially applied or reapplied after power cut 3 When dispenser selection switch is continuously pressed light is on in the following sequence Water gt Cube Ice gt Crushed Ice 4 Lamp is on when dispenser button is pressed and vice versa 5 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 6 If there is ice in the bin pushing the dispenser button will dispense it 7 When dispenser water button is pressed water valve opens and water is supplied if water valve is normally insta
56. ed 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 and 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 SM RE 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 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
57. f 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 2 8 from the deodorizer odors Odor from the old deodorizer plastic bowl and bag It 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 Plastic Odor Odors of mixed food and plastic Check wet food is wrapped with Clean the refrigerator Deodorizer option A 2 9 Micom Problems Symptom Causes Checks
58. for defrosting and the efficiency of the defrost operation See the table below for voltages and checkpoints SENSOR CHECK POINT NORMAL 30 C 50 C IN SHORT IN OPEN Freezing sensor POINT Voltage Defrost sensor POINT B Voltage Refrigerator sensor 1 POINT C Voltage Refrigerator sensor 2 POINT O Voltage 0 5 V 4 5 V OV 5V Room temperature sensor POINT E Voltage Water tank sensor POINT Voltage Optichill sensor POINT G Voltage 30 1 6 Switch entry circuit The following circuits are sensing signals from the test switch damper motor reed switch for testing and diagnosing the refrigerator 1 Option designation circuit model separation function 1 8 Stepping motor operation circuit el icio 9 16 TA7774P R5 256 Lm pK Ta 40 31 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 TA7774F 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 TA7774F 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 ter
59. g a capillary tube Measure distance with a ruler and put a mark 0 748 0 04 on the capillary tube Insert tube to the mark and weld it 79 Items Precautions 4 Vacuum degassing Evaporator Suction pipe Compressor Condenser 2 1 Low pressure amp High Blue pressure Yellow S IN KEY POINT f 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 while 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 each 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 50 in summer Calculation of a
60. he 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 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 thermostat 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 suppo
61. he 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 are not likely to play in or around it 1 SPECIFICATIONS SPECIFICATIONS GENERAL FEATURES 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 Defrosting Device Anti freezing Heater 1771 mm 6911 16 in MODELS LSC27910SW Super white Front View LSC27910ST Stainless 36 x 33 x 70 in 286 6 Ibs 27 cuft R134a 185gr Temperate N 115V 60Hz Fan Cooling MICOM control Full Automatic Heater Defrost Cyclo Pentane Fin Tube Type Wire Condenser LSC27910TT Titanium LD72LACH PTC Starting Type Polyol Ester 310 10 cc ID 90 83 4 Hours 13 70 Hours Heater Sheath MOLECULAR SIEVE XH 7 Water Tank Heater 1741 5 mm 681 2 in 1746 5 mm 683 4 in 1771 mm 6911 16 in LSC27910SB Black SPECIFICATIONS REFRIGERATOR FREEZER Case Material Door Material Handle Type Display Graphic Basket Quantity Ice Tray amp Bank Magic Crisper Lamp
62. iagnosis function is to facilitate service when a failure accurs and produces an error code 2 In occurrence of failure pressing the function adjustmenr button does not perform function 3 If nonconforming matters accurred are released during display of failure code MICOM returns to the original state Reset 4 Failure code is displayed on the display part of setting temperature for the freezing room and the display part of setting temperature for the cold storage room of display which are placed at the display part of a refrigerator All the display graphics other than a failure code are turned olf FA EJ F3 EM ICE a DISPENSER FRZ TEMP Adek REF TEMP FILTER LIGHT a MER vg o OJO F1 C CRUSH LIGHT Qe E TROUBLE CODE INDEX PRODUCT OPERATION STAUS IN FAILURE F1 F2 F4 CONTENTS OF FAILURE COMPRESSOR FREEZING BLDC COOLINGBLDC DEFROST STEPPING MOTOR MOTOR MOTOR HEATER DAMPTER ABNORMAL ABNORMAL REFRIGERATOR SENSOR1 R1 FULL OPENING FOR 10 MINUTES UPPER PART INTHE REFRIGERATOR SENSOR1 SHORT CIRCUIT STANDARD RPM FULL CLOSING FOR 15 MINUTES REFRIGERATOR COMPARTMENT ABNORMAL REFRIGERATOR SENSOR2 R2 NORMAL DISPLAY UPPER PART IN THE NOTE 1 REFRIGERATOR SENSOR2 SHORT CIRCUIT STANDARD RPM Er COMPARTMENT 8 DEFROST HEATER TEMPERATURE FUSE FAILED DEFROSTING SHORT CIRCUIT UNPLUGGED CONNECTOR STANDARD RPM INDICATED 4 HOURS LATER AFTER TROUBLE MOTOR DEFECT HOOKED OF LEAD
63. ice Confirm the amount of water 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 shown 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 Y X CAUTION When lifting the hinge free of the latch type1 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 5 Place the door inside facing up on a
64. lled on the right side of the machine room 8 Ice and water are not available when freezer door is open 42 2 Function of Icemaker 2 1 Initial Control Function 1 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 LSC27910 Refer to appendix DIP SWITCH SETTING _ Water Supply Time 3 If the water supply quantity setting is ch
65. minals INA and INB of IC10 as shown in the chart below drives the motor CCW Reverse rotation 4 Positive rotation CW INA INB gt 00 32 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 a part D part 8 part Motor OFF 5V 2V or less 2V or less Motor ON 8 16V C FAN PWM PS C FAN LOCK 0 MICOM 5K I 2W F FAN PWM KTC3198 P50 F FAN LOCK 33 1 10 Temperature compensation and temperature compensation circuit 1 Temperature compensation in freezer and refrigerator Temperature compensation at refrigerator 5 Freezer Refrigerator Resistance value Temperature RCF1 compensation 180 kO 5 C 9 F 56 4 C 7 2 F 33 3 C 5 4 F x x Temperature Remarks x 12 1 C 1 8 F 0 5 C 0 9 F x x x x x compensation 2 5 C 4 5 F Warmer 2 0 C 3 6 F 1 5 C 2 7 F 18 kQ 2 C 3 6 F 1 0 C 1 8 F 10 kO 0 C 0 F 10 kO 0 C 0 F Reference temperature 8 2 kQ 1 C 1 8 F 8 2 kQ 0 5 C 0 9 F 5
66. minute 1 minute seconds seconds seconds 2 9 Ringing of button selection buzzer 1 The ding will sound whenever a button is pressed 2 10 Ringing of compulsory operation compulsory frost removal buzzer 1 If pressing the test button in the Main PCB a beep will sound 2 In selecting compulsory operation alarm sound is repeated and completed in the cycle of On for 2 10 second and Off for 1 8 10 second three times 3 In selecting compulsory frost removal alarm sound is repeated and completed in the cycle of On for 2 10 second Off for 2 10 second On for 2 10 second and Off for 1 4 10 second three times 2 11 Defrost function 1 Defrost is performedwhenever total operation time of compressor becomes 7 50 hour 2 In providing initial power or returning power failure frost removal starts whenever total operation time of compressor becomes 4 5 hours 3 Defrost is completed if temperature of a defrost sensor becomes more than 5 C after starting defrost The defrost cycle will fail if the refrigerator does not reach a temperature of 5 C 9 F two hours into the defrost cycle 4 The defrost cycle will not operate of the defrost sensor fails arcs or shorts cut 2 12 Refrigerator lamp automatically off Refrigerator lamp turns on and off by refrigerator door switch If refrigerator lamp continuously turns on more than 7 minutes the refrigerator room lamp turns off automatically period 19 2 13 Sequential opera
67. mount of refrigerant charged the amount of refrigerant charged weight after charging weight before charging weight of an evacuated cylinder 80 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 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 9 04 nm d Molecular Pipe Molecular Go EN 0 74804 7 Make sure that the inner diameter is not di
68. move the dust with vacuum cleaner from the coils condenser while the refrigerator is off 9 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 Cu Fe Fe 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 If 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 29 Problems High temperature in the freezer compartment Causes Cycle pipe is clogged Checks Check sequence 1 Check temperature of condenser manually If it is warm OK If it is not compressor discharging joints might
69. mperature Problems High temperature in the freezer compartment Causes Poor cool air circulation due to faulty fan motor Checks Lock Check resistance with a tester 00 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 between The fan may be refrigerator and walls minimum 50mm Remove dust and contaminants broken if cleaning performs while the refrigerator is on from grill for easy heat radiation Re
70. n 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 0V 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 3 Sealed System Heavy Repair 3 1 The Heavy Repair Standards for Refrigerator with R134a Refrigerant ERA The opening time should be reduced to a half of Pipe Within 1 hour I Kore f the standards during rain and rainy seasons Comp Within 10 min protect moisture penetration TM SPA the penetration of water into the pipe is Drier Within 20 min dangerous Refer to repair note in each part Weld under nitrogen R134a refrigerant is more susceptible to leaks Nitrogen atmospher N2 than R12 and requires more care during To protect oxide scale formation Pressu
71. n system is clogged Moisture Residual moisture Air Blowing Not performed clogged in the evaporator sehr 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 sial Good storage after finishing Residual moisture Caps are missed transportation Piece 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 Miele jont 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 Weld oxides Drier angle Reduced 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 evap
72. n 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 69 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 it is continuous and servere insert Check the restrainer attachment capillary tube again depth 15 3mm conditions on the evaporator and Fasten the capillary tube to 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 o
73. nction with the icemaker to fill it at the appropriate time in its cycle 24 6 EXPLANATION FOR MICOM CIRCUIT 1 Explanation for PWB circuit 1 1 Power circuit The power circuit includes a Switched Mode Power Supply SMPS It consists of a rectifier BD1 and CE1 converting AC to DC a switch IC2 switching the DC voltage a transformer and a feedback circuit IC3 and 4 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 4 5 Voltage 120 Vac 160 Vdc 14 Vdc 12 Vdc 15 5 Vdc 5 Vdc L2 I5mH CM2 4 1 220nF 2 5VAQ FUSEI 250V I5A 25 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 IC1 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 CSTS4 00MG03 osci 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 i
74. not work when cube mold is lull 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 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 45 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 function 2 8 page 21 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 CONO 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
75. ntact 6 Insufficient lubricants on door hinge 56 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 m Not inserted Loosened by vibration 3 Bad lamp socket Disconnection m Bad soldering Bad rivet contact Short Water penetration Low water level in tray Bad elasticity of contact Bad contact corrosion 4 Door switch Defective Refrigerator and freezer switches are reversed Travlel distance Bad connection terminal contact Adiabatics liquid leak 1 Lead wire is damaged Connect conduction and Wire damage when assembling Bracket Cover non conduction parts and 1 Outlet burr 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 components Freezer compartment terminal Touching evaporator pipe 3 Faulty parts Transformer Te contacts cover Welded terminal parts contact cover Compressor Bad coil insulation Plate heater Melting fuse Sealing is broken Moisture penetration Cord heater damaged Moisture penetration Bad sealing Sheath heater 57
76. of ice cream is below 15 C 5 F Therefore ice cream may melt if it is stored in the door rack e 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 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 85 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 i
77. ompartment 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 99 Ice in the freezer 1 Bad cooling air circulation Check food storage conditions 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 defros
78. on 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 Mises T Surface Liquid shortage door surface Cormer 2 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 r Compressor sound UE 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 m COMBO sound Chattering sound Insulation paper vibration m Capacitor noise Pipe contacts each other Narrow interval Pipe sound No vibration damper B Damping Bushing Q Damping
79. orator 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 50 CLAIMS 3 Refrigeration is weak CAUSES AND CHECK POINTS 1 Refrigerant Partly leaked Weld joint leak Parts leak 2 Poor defrosting capacity Drain 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 2 FUR RC P 51 CLAIMS 3 Refrigeration is weak CAUSES AND CHECK POINTS Residual Weak heat from heater Sheath Heater rated frost Heater plate No contact to drain
80. r operates independently of the Ice Plus setting and operation 6 At the end of the Ice Plus cycle the freezer defaults to its original setting 7 If frost removal starting time is arrived during Ice Plus Ice Plus operation is done only for the remaining time after completion of frost removal when the Ice Plus operation time passes 90 minutes If passing 90 minutes Ice Plus operation is done only for 2 hours after completion of frost removal 8 If pressing Ice Plus button during frost removal the Ice Plus LCD or LED is turned on but if pressing the Ice Plus compressor operates after the remaining time has passed 9 If selection Ice Plus within 7 minutes delay for 7 minutes of compressor after the compressor stops compressor operates after the remaining time has passed 10 The freezer fan motor operates at the high speed of RPM during operation of Ice Plus 2 6 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 or express freezing operation or load response operation 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 or home bar 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
81. r 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 Z 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 3 or 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 Defective 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
82. rant If not compressor oil may leak Compressor a 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 Refrigen Intake When replacing a drier Weld 1 And 2 parts by blowing nitrogen 0 1 0 2kg cm2 to high pressure side after assembling a drier When replacing a compressor Weld 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 Insertin
83. re pressure 0 1 0 2 welding kg cm2 Do not apply force to pipes before and after welding to protect pipe from cracking 2 O Pipe and piping system opening time Welding Sounds while removing bushing cap Sound usable No sound Not usable Refrigeration cycle Evacuation time Min More than 40 min To remove moisture Only applicable to the model equipped with Vacuum degree Torr Below 0 5 ref reverse flow protect plate High and low pressure side evacuates at the Vacuum eficiency can be improved by operating Vacuum same time for models compressor during evacuation above 200 Vacuum piping Pipe couple EA 2 else To protect R12 Refrigerant mixing Outlet Socket R134 exclusive AA R134 exclusive In case of evaporator parts if it does not make To protect moisture penetration noise when removing bushing cap blow dry air or N2 gas for more than 1 min use the parts N2 Sealed parts The bushing pipes for R12 refrigerant shall be melted when they are used for R134a refrigerant causes of leak Use R134a exclusive To protect mixing or mineral and manifold ester oils gt m r gt Do not weigh the refrigerant at too hot or too Use R134a exclusived cold an areas 25 C 77 F is adeqate weighing allownce 5g Note Winter 59 Summer 59 Refrigerant weighing EA Do not mix with R12 refrigerant Use copper charging canister Socket 2SV Plug 2PV R134a Note Do not burn O ring rubber
84. rigerant 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 gt 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 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 pro
85. rt 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 99 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 dissembling the container box Check icing at intake ports of freezer and refrigerator compartment Check gasket attached conditions Check door assembly conditions Check refrigerator c
86. storted 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 81 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 MO TZ D D Pipe assembly Condenser Assembly wire Copper Brazing ee Bun Silver Brazing Copper Brazing Copper Brazing 82 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 compartment 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
87. t 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 interfere 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 Explai
88. t 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 freezer 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 wors
89. ting 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 Icing 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 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 refrigera
90. tion of built in product Built in products such as compressor frost removal heater freezing room fan Cooling Fan and step motor damper are 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 When temperature If error occurs of a frost removal POWER OPTICHILL during operation sensor becomes seo 8 p ieee initial operation is more than 45 c C FAN MOTOR not done 113 In purchase ON ON movement gt When Sequence of 9 FROST DAMPER temperature ofa POWER hen REMOVAL n load operation a ema HEATER HEATER gt DUCTDOOR I when closing sensor becomes 6 OPTICHILL Freezer and less than 49C HEATER OFF Refrigerator 113 F In power failure service 0 3 COMP sec Bet mode 1 If pressing switch Compulsory OTHER COMP F FAN 03 STEP once more in the function LOAD seo seo DAMPER test mode 2 or C FAN MOTOR temperature of a 4 CLOSE frost removal sensor is more than 45 C 113 F S Rstmode2 a M M Compulsory frost TEST 0 3 F FAN 03 init SWITCH COMP sec mode for initial removal PRESS U C FAN operation 2 Times OFF OFF COMP operates after 7 minutes 20 2 14 Failure Diagnosis Funtion 1 Failure d
91. tor 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 9 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 Touch the piping at various place along its route Install adamper at the point where your tuch reduces the noise 4 Avoid pipe interference 5 Replace defective fan and fan motor 6 Adjus
92. tself During normal operation the voltage at the reset terminal is 5 Vdc If the reset fails the MICOM will not operate 26 1 4 Load dispenser operation door opening circuit 1 LOAD DRIVING CIRCUIT e The fan operates at the regular speed even if the door of the refrigerator or freezer is opened When the doors are closed the fan reverts to its original speed e A B C and D of door switch for the freezer or refrigerator are connected to the door open sensing circuit in parall toward both ends of switch to determine door open at MICOM e Inthe TEST mode the fan will stop if any door is opened It will resume operation when the door is closed Tube of Load Frost Removal AC Converting Refrigerator Dispensor P Heater Relay LAMP Heater Measuring part IC6 IC6 16 IC6 13 IC6 12 IC6 15 IC6 14 ON Within 1 V Status OFF 12V CONI 9 Y RUNNING CAPACITOR STRATING CAPACITOR COP eee EINS OCAA2O ped me NE m P T C ASSY R DOOR S W gt 1 fie sz MICOMI O H BAR i S CON RY4 O O LA FUSE MELTING j vec A Ih RY5 27 2 Dispenser operation circuit DISPENSER LEVER S W SOLENOID DISPENSER 000 Q O 000 lt 63 N S Zo gt 1 Check load driving status MICOM WATER VALVE Type of Load GEARED SOLENOID SOLENOID MOTOR BE DI
93. ty 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 m No electric power on compressor Faulty compressor Power does not conduct Damage Characteristics of COMBO is wrong Bad connection with pa loose compressor Assembly is not possible Bad terminal connection t p 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 4TM437NFBYY 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 49 CLAIMS 2 No cooling 2 Refrigeratio
94. ure code 6 If you press the TEST button while a failure code is displayed the test mode will not begin Mode Operation Contents Remarks Test 1 Press test button once 1 Continuous operation of compressor Freezing fan turns off in strong cold mode 2 Continuous operation of freezing bldc motor door opening high speed RPM and cooling bldc motor 3 Defrost heater turns off 4 Stepping motor damper is completely opened open of baffle 5 Optichil stepping motor damper is completely closed 6 All display LEDs or LCD graphics turn on Test 2 Press test button once at 1 Compressor OFF Return to the normal mode the test mode 1 status 2 Freezing bldc motor and cooling bldc motor when the defrost sensor is forced defrost mode turn off above 5 C 3 Defrost heater turns on 4 Stepping motor damper is completely closed closing of baffle 5 OptiChil stepping motor damper is completely closed Normal Press test button once at Return to the initial status Compressor will operate Status the test mode 2 status after delay for 7 minutes LED ALL ON ICE did DISPENSER FRZ TEMP REF TEMP FILTER LIGHT esa COLDEST CUBE O e EJ MO O J Only LED F R MIDDLE NOTCH ON ICE PLUS DISPENSER FRZ TEMP REF TEMP FILTER LIGHT LOCK 5 Sl FILTER reser E o CUBE ie EO WATER 5 COLD mmm CRUSH LIGHT Ae 2 16 Function of dispenser and water dispenser built in

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