LG SXS Refrigerator Service Manual Download Page 52

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1-12. Key Button Input and Display Lighting Circuit

This circuit is to judge the work of function control button on the operation panel and to light each function indication led
(LED module). It is driven by SCAN method.

EXPLATION FOR MICOM CIRCUIT

- 52 -

<GW-P/L227: 88-LED>

<GW-P/L227: Bar-LED>

PCB ASSEMBL

DISPLA

PWB ASSEMBLY, DISPLAY

Summary of Contents for SXS Refrigerator

Page 1: ...EASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK BEFORE CHECKING OR OPERATING THE REFRIGERATOR REFRIGERATOR SERVICE MANUAL Ref No GW L227 Ref No GW C227 Ref No GW B227 Ref No GW P227 http biz lgservice com ...

Page 2: ...D OVER COLD AT FREEZING ROOM 54 PWB PARTS DRAWING AND LIST 55 ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 67 WORKING PRINCIPLES 67 FUNCTION OF ICE MAKER 67 ICE MAKER TROUBLESHOOTING 71 CIRCUIT 73 TROUBLE DIAGNOSIS 75 TROUBLE SHOOTING 75 FAULTS 85 COOLING CYCLE HEAVY REPAIR 102 HOW TO DEAL WITH CLAIMS 109 HOW TO DISASSEMBLE AND ASSEMBLE 114 DOOR 114 HANDLE 115 SHROUD GRILLE FAN 115 ICEMAK...

Page 3: ...em 7 Make sure the hook is correctly engaged Remove dust and foreign materials from the housing and connecting parts 8 Do not fray damage machine heavily bend pull out or twist the power cord 9 Please check the evidence of moisture intrusion in the electrical components Replace the parts or mask it with insulation tapes if moisture intrusion was confirmed 10 Do not touch the icemaker with hands or...

Page 4: ...Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a 180g LUBRICATING OIL FREOL 10G 310 cc DRIER ID 0 83 CAPILLARY TUBE MOLECULAR SIEVE XH 7 1753 894 600 690 753 1130 Front View Plane View 1 Ref No GW P227 L227 C227 B227 ITEMS SPECIFICATIONS FIRST DEFROST 4 5 Hours DEFROST CYCLE 13 15 Hours DEFROSTING DEVICE Heater Sheath ANTI SWEAT HEATER Dispenser Duct Door Heater Dispenser Heater Home Bar H...

Page 5: ...awer Shelf or Drawer Door rack Drawer 2 or 3 Door rack Lower cover Shelf Refreshment center Optional Can Server Optional Egg Box Vegetable Drawer 1 or 2 Door Rack Wine holder Plastic or wire Door Rack Conversion switch Meats Vegetables Optional Drawer Snack drawer Optional Shelf Folding or Normal Miracle Zone Optional Fresh compartment Optional Humidity switch 1 Ref No GW P227 L227 INTERNAL FILTER...

Page 6: ...Drawer Door rack Drawer 2 or 3 Door rack Lower cover Shelf Refreshment center Optional Can Server Optional Egg Box Vegetable Drawer 1 or 2 Door Rack Wine holder Plastic or wire Door Rack Conversion switch Meats Vegetables Optional Drawer Snack drawer Optional Shelf Folding or Normal Miracle Zone Optional Fresh compartment Optional Humidity switch Cover PWB Home Bar Ice Water Dispenser Button L227 ...

Page 7: ... Drawer 2 or 3 Door rack Lower cover Shelf Refreshment center Optional Door rack 1piece or 2piece Egg Box Vegetable Drawer 1 or 2 Wine holder Plastic or wire Door Rack Door rack 1piece or 2piece Conversion switch Meats Vegetables Optional Snack drawer Optional Shelf Folding or Normal Miracle Zone Optional Fresh compartment Optional Humidity switch 3 Ref No GW C227 B227 B227 Non Home bar ...

Page 8: ...frigerator compartment 2 If the height of freezer door is higher than that of refrigerator compartment Insert a driver into the groove of adjusting screw and rotate driver in arrow direction clockwise until the refrigerator becomes horizontal Insert a driver into the groove of adjusting screw and rotate driver in arrow direction clockwise until the refrigerator becomes horizontal HOW TO INSTALL RE...

Page 9: ...firm the following installation parts HOW TO INSTALL REFRIGERATOR 9 Class Shape and Spec Nomenclature P No Remarks Valve Feed 5221JA3001A Common Use Connector MECH Pipe 4932JA3003A Conversion Connector 3 4 6631JA3004A No Holes Balance Conector 3 4 6631JA3004B Packing ø24x3t 3920JA3001B Connector MECH Pipe 4932JA3003B Conversion Connector W25 6631JA3004C No Holes Balance Conectoor W25 6631JA3004D P...

Page 10: ...nser button for 2 3 minutes and confirm that the water comes out Caution Feed pipe should be connected to cold water line If it is connected to hot water line trouble may occur Please check rubber packing when connecting feed pipe 2 Check leakage at connecting part then arrange water tube and locate the refrigerator at its regular place if there is no leaking HOW TO INSTALL REFRIGERATOR 10 Single ...

Page 11: ...e than 4m less water will come out due to pressure drops Use standard feed tube to prevent leaking Outternal Filter 1 Filter Fixation 1 Connect feed tube to the filter outlet and water valve connecting tube 2 Fix the filter at proper place around the sink where it is easy to replace the filter and to receive the cleaning water Please consider the length of tube shall be less than 8m when locating ...

Page 12: ...turning it clockwise by 90 degrees Note Check that the guideline and the fastening indication line are aligned 2 Replacement of water filter While holding the lower part of the filter turn it counterclockwise by 90 degrees and pull it down Note Check that the guideline and the loosening indication line are aligned After installing water filter Reassemble the lamp cover and the top shelf of the ref...

Page 13: ...low 2 The bell rings ding dong and ice tray rotates and water comes out from the icemaker water tube 3 The water shall be supplied two or three times into the tray The amount of water supplied for each time is small Put a water container under the ice tray and press test switch 4 When ice tray rotates the water in it will spill Collect the spilt water and throw away into the sink 5 When ice tray h...

Page 14: ...ed into the ice tray 4 If ice cube sticks together decrease the water supplying time This happens when too much water is supplied into the ice tray Caution When adjusting the amount of water supplied adjust step by step Otherwise the water may spill over 3 When adjustment of control switch for the amount of water supplied is complete check the level of water in the ice tray HOW TO INSTALL REFRIGER...

Page 15: ...1 Monitor Panel 1 1 GW P227 GW L227 1 2 GW C227 B227 MICOM FUNCTION 15 Optional Function display board Type 1 88 LED Type 2 Bar LED Type 1 88 LED Type 2 Bar LED Optional Function display board ...

Page 16: ...nction is available when exhibiting a refrigerator in the shopping moll Function is inserted with recognition sound Ding if pressing both the Express FRZ button and the REFRIGERATOR button at the same time for more than 5 seconds If function is inserted all basic refreezing functions at the R F room and the Storage room COMP F FAN C FAN turns off and the display normally operates However the dispe...

Page 17: ...Weak 3 The temperature setting condition of freezer and refrigerator compartments shall not be indicate in the standard model GW P227 GW L227 GW C227 GW B227 when refrigerator or home bar door is closed MICOM FUNCTION 17 Division Power Initially On 1st Press 2nd Press 3th Press 4th Press Type 1 88 LED Type 2 Bar LED 19 C 3 C 22 C 2 C 23 C 0 C 15 C 6 C 17 C 4 C Change of Indication Lamp Temperature...

Page 18: ...t 2 4 Express freezing 1 Express freezing is function to improve cooling speed of the freezing room by consecutively operating compressors and freezing room fan 2 Express freezing is released if power failure occurs and then returns to the original status 3 Temperature setting is not changed even if selecting the express freezing 4 The change of temperature setting at the freezing room or the cold...

Page 19: ...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 2 7 Door opening alarm 1 Buzzer generates alarm sound if doors are not closed even when more than a minute consecutively has passed with doors of freezing cold storage room or ho...

Page 20: ... movement If error occurs during operation initial operation is not done Sequence of load operation when closing F room and R room If pressing switch once more in the test mode 2 or temperature of a frost removal sensor is more than 5 C it immediately returns to the test mode for initial operation COMP operates after 7 minutes When temperature of a frost removal sensor becomes less than 45 C In po...

Page 21: ...ed 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 LED which are placed at the display part of a refrigerator All the LED graphics other than a failure code are turned off In display of the failur...

Page 22: ...is out of order during service 2 The function control button does not work but the recognition sound is heard when the refrigerator is out of order 3 It returns to normal conditions when trouble code led is off reset 4 Trouble code is indicated by the freezing temperature indicator led in the refrigerator display All leds except trouble code are off ...

Page 23: ...ive of test mode and then is reset to the normal status 3 Function adjustment button is not perceived during performance of test mode but only warning sounds ring 4 In finishing test mode always pull the power cord out and then plug in it again for the normal state 5 If nonconforming contents such as sensor failure are found during performance of test mode release the test mode and display the fai...

Page 24: ...spective of test mode and then is reset to the normal status 3 Function adjustment button is not perceived during performance of test mode but only warning sounds ring 4 In finishing test mode always pull the power cord out and then plug in it again for the normal state 5 If nonconforming contents such as sensor failure are found during performance of test mode release the test mode and display th...

Page 25: ...nd solenoid are automatically off if there is no signal after 3 minutes when ice crushed and cube or water is selected and dispenser switch is pressed down Solenoid duct door stops after 5 seconds when solenoid is off in order to protect short circuit from solenoid heat generation 5 Dispenser Lamp On Off Function The dispenser lamp shall be on or off whenever dispenser button is pressed or release...

Page 26: ...de of the switching terminal to the secondary side and the feedback part IC3 IC4 transferring it to the primary side Caution Since high voltage DC310V is maintained at the power terminal please take a measure after more than 3 minutes have passed after removing power cords in the abnormal operation of a circuit Voltage of every part is as follows GW B C227 88 LED GW B C227 Bar LED Part VA1 CE1 CE2...

Page 27: ...EXPLATION FOR MICOM CIRCUIT 27 GW P L227 88 LED GW P L227 Bar LED ...

Page 28: ...t is circuit allowing various parts such as RAM inside of MICOM IC1 to initialize and the whole of function to start from the initial status when initial power is input or when power is applied again to MICOM by a spontaneous power failure LOW voltage is applied to the reset terminal of MICOM in the beginning of power supply for a constant time 10ms Reset terminal during general operation is 5V No...

Page 29: ...oom are connected to the door open sensing circuit in parallel toward both ends of switch to determine door open at MICOM Since a door switch of the home bar is connected to door switch C D of the cold storage room it senses door opening if even one of both is opened The fan motor is immediately stop if opening doors of the freezing room or cold storage room at the TEST mode and it immediately ope...

Page 30: ...EXPLATION FOR MICOM CIRCUIT 30 GW P L227 Bar LED ...

Page 31: ...ted to the door open sensing circuit toward both ends of switch to determine door open at MICOM Since a door switch of the home bar is connected to door switch C D of the cold storage room it senses door opening if even one of both is opened EXPLATION FOR MICOM CIRCUIT 31 GW B C227 88 LED P T C ASSEMBLY COMP Measuring part IC6 No 16 No 11 No 10 No 15 No 14 Status ON Within 1 V OFF 12 V Type of Loa...

Page 32: ...FOR MICOM CIRCUIT 32 GW B C227 Bar LED ASSEMBLY Measuring part IC6 No 16 No 11 No 12 No 15 No 14 Status ON Within 1 V OFF 12 V Type of Load COMP Frost Removal Heater AC Converting Relay R room LAMP Homebar Heater ...

Page 33: ...2 Dispenser operation circuit EXPLATION FOR MICOM CIRCUIT 33 GW P L227 88 LED GW P L227 Bar LED ...

Page 34: ...uring part Lever S W IC1 Micom No 15 16 On Press OFF 5V 0 V 60 Hz 5 V Measuring part IC7 No 16 IC7 No 15 IC7 No 14 IC7 No 13 IC7 No 12 IC7 No 11 IC7 No 10 Status ON Within 1 V OFF 12 V Type of Load GEARED MOTOR SOLENOID CUBE WATER VALVE ICE WATER PILOT VALVE SOLENOID DISPENSER HOME BAR HEATER ...

Page 35: ...3 Door opening sensing circuit EXPLATION FOR MICOM CIRCUIT 35 GW B C227 88 LED GW B C227 Bar LED GW P L227 88 LED GW P L227 Bar LED ...

Page 36: ...sense the door open switch c d or the home bar switch EXPLATION FOR MICOM CIRCUIT 36 Closing 5 V A B C D E F S W at both ends are at Off status Opening 5 V A B C D E F S W at both ends are at On status Measuring part IC1 MICOM No 47 46 Pin Door of Freezing Cold Storage Room CONDITIONS Bell sounds when button on Beep sounds when warning MEASURING dosplay is pressed door opening OFF POINTS IC1 No 48...

Page 37: ...1 5 Temperature sensing circuit EXPLATION FOR MICOM CIRCUIT 37 GW P L227 88 LED GW P L227 Bar LED ...

Page 38: ...nsing temperature of a frost removal sensor necessary for frost removal Short or open status of every temperature sensor is as follows SENSOR CHECK POINT NORMAL 30 C 50 C IN SHORT IN OPEN Freezing sensor POINT A Voltage Frost removal sensor POINT B Voltage Cold storage sensor 1 POINT C Voltage 0 5 V 4 5 V 0 V 5 V Cold storage sensor 2 POINT D Voltage Ice making sensor POINT E Voltage Room temperat...

Page 39: ...EXPLATION FOR MICOM CIRCUIT 39 GW B C227 88 LED E A B C D ...

Page 40: ... sensing temperature of a frost removal sensor necessary for frost removal Short or open status of every temperature sensor is as follows GW B C227 Bar LED A E B D C SENSOR CHECK POINT NORMAL 30 C 50 C IN SHORT IN OPEN Freezing sensor POINT A Voltage Frost removal sensor POINT B Voltage Cold storage sensor 1 POINT C Voltage 0 5 V 4 5 V 0 V 5 V Cold storage sensor 2 POINT D Voltage Room temperature...

Page 41: ...on and notifying it to MICOM Designation of option by model and the application standards are as follows u These circuits are accurately pre adjusted in shipment from factory and so you must not additionally add or remove option EXPLATION FOR MICOM CIRCUIT 41 GW B C227 88 LED GW B C227 Bar LED GW P L227 88 LED GW P L227 Bar LED GW B C227 88 LED GW B C227 Bar LED GW P L227 88 LED GW P L227 Bar LED ...

Page 42: ...1 8 Stepping motor operation circuit EXPLATION FOR MICOM CIRCUIT 42 GW B C227 88 LED GW B C227 Bar LED GW P L227 88 LED GW P L227 Bar LED ...

Page 43: ...nd 35 as shown in wave form of the following part These signals are output to the output terminal No 10 11 14 15 via the input terminal No 3 6 8 of the IC10 TA7774F as IC for motor driving Output signals allow motor coils wound on each phase of stator to form rotation magnetic field and the motor to rotate Inputting as below figure to the input terminal INA INB as IC TA7774AF for motor driving all...

Page 44: ...erform a temporary change of speed for the fan motor and applies DC voltage up to 7 5V 16V to motor 3 This circuit performs function not to drive the fan motor further by cutting off power applied to the fan motor in the lock of fan motor by sensing the operation RPM of the fan motor EXPLATION FOR MICOM CIRCUIT 44 a d part b part e part Motor OFF 5V 2V or less 2V or less Motor ON 2 3V 12 14V 8 16V...

Page 45: ...EXPLATION FOR MICOM CIRCUIT 45 GW P L227 Bar LED b a e d ...

Page 46: ...EXPLATION FOR MICOM CIRCUIT 46 GW B C227 88 LED GW B C227 Bar LED b a e d b a e d ...

Page 47: ...ompensation and over cool weak cool compensation circuit 1 Temperature compensation at freezing room cold storage room EXPLATION FOR MICOM CIRCUIT 47 GW P L227 88 LED GW P L227 Bar LED GW B C227 88 LED GW B C227 Bar LED ...

Page 48: ... C for Freezing room temperature and 2 C for Cold storage room temperature R J1 12kΩ 1kΩ R J2 12kΩ RCRI 5 6kΩ 18kΩ Freezing room Cold storage room Resistance value Temperature Resistance value Temperature Remarks R J1 R J2 compensation RCR1 compensation 5 C 180 kΩ 2 5 C Warmly 4 C 56 kΩ 2 0 C compensate 3 C 33 kΩ 1 5 C 2 C 18 kΩ 1 0 C 1 C 12 kΩ 0 5 C 0 C 10 kΩ 0 C Reference temperature 1 C 8 2 kΩ ...

Page 49: ... 5 6 kΩ Down Down Down change Up Up Up Up Up Up Up 2 C 1 5 C 1 C 0 5 No 0 5 C 1 C 1 5 C 2 C 2 5 C 3 C Cold storage 8 2 kΩ Down Down Down Drop change Up Up Up Up Up Up room 2 5 C 2 C 1 5 C 1 C 0 5 C No 0 5 C 1 C 1 5 C 2 C 2 5 C RCR1 10 kΩ Down Down Down Down Down change Up Up Up Up Up 3 C 2 5 C 2 C 1 5 C 1 C 0 5 C No 0 5 C 1 C 1 5 C 2 C 12 kΩ Down Down Down Down Down Down change Up Up Up Up 3 5 C 3...

Page 50: ...1 11 Display Circuit EXPLATION FOR MICOM CIRCUIT 50 GW P L227 ...

Page 51: ...EXPLATION FOR MICOM CIRCUIT 51 GW B C227 ...

Page 52: ...uit is to judge the work of function control button on the operation panel and to light each function indication led LED module It is driven by SCAN method EXPLATION FOR MICOM CIRCUIT 52 GW P L227 88 LED GW P L227 Bar LED PCB ASSEMBLY DISPLAY PWBASSEMBLY DISPLAY ...

Page 53: ...EXPLATION FOR MICOM CIRCUIT 53 GW B C227 88 LED GW B C227 Bar LED ...

Page 54: ...LED Compensation Compensation for weak cold for over cold Temperature compensation value Remarks JCR3 JCR4 JCR1 JCR2 at cold storage room 0 C In shipment from factory CUT 1 C CUT 1 C CUT 1 C CUT 1 C CUT CUT 2 C CUT CUT 2 C CUT CUT 0 C CUT CUT 0 C CUT CUT 0 C CUT CUT 0 C CUT CUT CUT 1 C CUT CUT CUT 1 C CUT CUT CUT CUT 0 C Temperature compensation in CUT JCR1 1 C 2 C JCR2 1 C JCR3 1 C 2 C JCR4 1 C E...

Page 55: ...3 PWB Parts Drawings and List 3 1 PWB Assembly Main Parts Drawings EXPLATION FOR MICOM CIRCUIT 55 GW P L227 88 LED ...

Page 56: ...EXPLATION FOR MICOM CIRCUIT 56 GW P L227 Bar LED ...

Page 57: ...EXPLATION FOR MICOM CIRCUIT 57 GW B C227 88 LED ...

Page 58: ...EXPLATION FOR MICOM CIRCUIT 58 GW B C227 Bar LED ...

Page 59: ...3 2 Parts List EXPLATION FOR MICOM CIRCUIT 59 GW P L227 88 LED ...

Page 60: ...EXPLATION FOR MICOM CIRCUIT 60 GW P L227 88 LED ...

Page 61: ...EXPLATION FOR MICOM CIRCUIT 61 GW P L227 Bar LED ...

Page 62: ...EXPLATION FOR MICOM CIRCUIT 62 GW P L227 Bar LED ...

Page 63: ...EXPLATION FOR MICOM CIRCUIT 63 GW B C227 88 LED ...

Page 64: ...EXPLATION FOR MICOM CIRCUIT 64 GW B C227 88 LED ...

Page 65: ...EXPLATION FOR MICOM CIRCUIT 65 GW B C227 Bar LED ...

Page 66: ...EXPLATION FOR MICOM CIRCUIT 66 GW B C227 Bar LED ...

Page 67: ...here is ice in the ice bank 7 In case of water mode when dispenser button is pressed water valve opens and water is supplied if water valve is normally installed on the right side of the machine room 8 Ice and water are not available when freezer door is open ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 67 Level Ice Maker Cube Mould for Initial Control after power is input Power Input Ini...

Page 68: ...e amended time If DIP switch is changed during water supply water shall be supplied for the previous setting time But it will supply for the amended time from the next supply 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 suppl...

Page 69: ...en 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 5 If ice ejection motor or Hall IC is abnormal ice ejection motor rotates in normal direction to exercise initial operation It resets the ice maker if ice ejection motor or Hall IC is n...

Page 70: ...hen test function performs normally buzzer sounds and water supply shall carry out Check it for repair if buzzer does not sound 4 When water supply is completed the cycle operates normally as follows Ice making Ice ejection Returning to horizontal conditions Water supply 5 Remove ice from the ice maker cube mould and press test switch when ice maker cube mould is full of ice as ice ejection and wa...

Page 71: ...hooting check Failed Ice Maker Unit Is the resistance of both ends 9 10 of ice ejection motor of CON8 between 18 and 22Ω Is ice ejection motor drive circuit IC11 and peripheral circuits normal Defects between Hall IC and Board Pin No 42 of IC1 Confirm ice ejection and level return when pressing test switch Replace Ice Maker Unit Replace Main PWB Are ice ejection and level return normal when test s...

Page 72: ...ction motor drive circuit IC11 and peripheral circuits normal Defects between Hall IC and Board Pin No 46 of IC1 Confirm ice ejection and level return when pressing test switch Replace Ice Maker Unit Replace Main PWB Are ice ejection and level return normal when test switch is pressed for more than 0 5 second Does the bell sound once Failed ice maker unit test switch Are both ends 5 6 of CON8 test...

Page 73: ...CIRCUIT 73 GW P L B C227 88 LED ...

Page 74: ...CIRCUIT 74 GW P L B C227 Bar LED ...

Page 75: ...al Bad connection between plug and adapter faulty plug The distance between pins Pin outer diameter No power on power cord O L P is off No electric power on compressor Faulty compressor Faulty PTC Disconnectedcopperwire Internalelectricalshort Faultyterminalcontact Disconnected Capacity of O L P is small CharacteristicsofO L Pisbad Badconnection Poweris disconnected InnerNi Crwireblowsout Bad inte...

Page 76: ...eaveitintheair Moisturepenetration intotherefrigerationoil Capsaremissed Airblowing Duringtransportation During work Notperformed Performed Tooshorttime Lowairpressure Lessdryair AirBlowing Leaveitintheair Capsaremissed Shortpipeinsert Pipe gaps Toomuchsolder Toolarge Damagedpipes Notdriedinthecompressor Elapsedmorethan6monthsafterdrying Capsaremissed Nopressurewhenitisopen Duringresttime Afterwor...

Page 77: ...oreignmaterials penetration Cap drain is not disconnected Injectthroughthe hole Seal with drain P Ulumpinput Screw input Otherforeignmaterials input Parts disconnected Wire is cut Leadwire Heatingwire Contactpoint betweenheatingand electricwire Dentbyfineevaporator Heatingwireiscorroded Waterpenetration Badterminalconnection Check visually Check terminal Conduction OK No conduction NG If wire is n...

Page 78: ...cation thickness Structural fault Gasket gap Airinflowthroughthefanmotor Badinsulationofcasedoor SheathHeater rated Heaterplate rated Gap Badattachment Contraction Badadhesion Weakbindingforceathinge Fanmotor Door switch Selflocked Wireiscut Badterminalcontact Contact distance Buttonpressure Meltedcontact Contact Poordoor attachment Door liner dimension Contractioninner liner Misalignment Badtermi...

Page 79: ...is constrained Insufficient motorRPM Faultyfan Shorud Bent Iceandforeignmaterialsonrotatingparts Fanshroudcontact Clearance Dampingevaporatorcontact Accumulatedresidualfrost Fanmisuse Badshape Looseconnection Nottightlyconnected Insertdepth Ratingmisuse Smallcapacity Lowvaltage Malfunction of charging cylinder Wrongsettingofrefrigerant Insufficientcompressor Faultycompressor Fanoverload Fanmisuse ...

Page 80: ... U dump liquid Faulty contact Faulty temperature characteristics External air inflow Rubber motor assembly direction reverse Door opens but not closes Gap around gasket Contraction distortion loose door twisted corner not fully inserted Food vapor Storing hot food Unsealed food Door opens but not closes Gasket gap Cool air leak and transmitted Highambienttemperature Space is secluded Differentrati...

Page 81: ...r compartment operating sounds Compressor sound Sound from machine itself inserted Sound from vibration Restrainer Rubber 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 O L P sound Chattering sound Insulation paper vibration...

Page 82: ...nfault Coregap Bad connection Correct screw connection Bad assembly Distortion Foreignmaterialsinside Badconnection Partlydamaged Notconnected Badpipecaulking Normaloperatingsound Vibrationsound Agedrubberseat Badtorqueforassemblingmotor bracket Fanguidecontact Shroudburrcontact Dampingevaporatorcontact Residualfrostcontact Unbalance Iceonthefan Airintake oppositetomotor rubberassembly Supporterdi...

Page 83: ...Travlel distance Bad connection Bad terminal contact P U liquid leak 1 Lead wire is damaged Wire damage when assembling P T C Cover Outlet burr in the bottom plate Pressed by cord heater lead wire evaporator pipe 2 Exposed terminal Compressor Compartment terminal Touching other components Freezer compartment terminal Touching evaporator pipe 3 Faulty parts Transformer Coil contacts cover Welded te...

Page 84: ...tweendoorlinerandinnerliner Refrigerator compartmentis openedwhenfreezer compartmentis closed faultystopper High Faultydampercontrol Buttonissetat weak Doorisopen interferenceby food No deodorizer Poorcapacity Seal condition Storespecialodorousfood Longtermstorage Odorsfromchemicalprocucts Biggerdoorfoam Hinge Pintilted Poorflatness Nowasher Nogreaseandnotenough quantity Stopperwornout Badfreezerc...

Page 85: ... and products Replace with rated fuse Electricity leakage Check the resistance of power cord If fuse blowns out High voltage with testerf if it is 0Ω it is shorted frequently reconfirm Short circuit of components the cause and prevent tracking due to moisture and dust penetration Problems Causes Checks Measures Remarks Compressor Faulty PTC Check the resistance If resistance is infinite replace it...

Page 86: ...button faulty operation Confirm icing causes and repair switch operation Press button to check Replace door switch Faulty button pressure and contact Press button to check operation Door cannot press door switch Door sag fix door button Check visually Door liner bent replace door or attach sheets Bad radiation conditions in Check the clearance between the Keep clearance between The fan may be comp...

Page 87: ... pressure side 3 Check silver soldered parts Cu Fe Fe Fe 4 Check bending area of wire condenser pipe in compressor compartment cracks can happen during bending 5 Check other parts compressor compartment and evaporators in freezer compartment Shortage of refrigerant Check frost formation on the surface Find out the leaking area repair Drier must be replaced of evaporator in the freezer evacuate and...

Page 88: ...e weld If it is warm it s OK joints might be clogged If it is not condenser outlet weld Disconnect with torch remove the joints might be colgged causes evacuate and recharge seal refrigerant Leak at loop pipe weld joint Check sequence Replace the compressor weld Drier must be replaced discharge in compressor 1 Manually check whether evacuate and recharge refrigerant condenser is warm It is not war...

Page 89: ...mpurities by inserting are clogged of ice insert the copper line copper wire Turn off more than 1 Impurities through the hole to check 3hours and pour in hot water if 2 Ice 2 Put hot water into the drain frost is severe check drains outside 2 Put in hot water to melt down frost 3 Check the water outlet 4 Push the heater plate to sucking duct manually and assemble the disconnected parts Gap between...

Page 90: ...k by inserting soft copper 3 Reassemble the heater plate wire into the duct soft and thin copper not to impair heating wire Bad cool air inflow and discharge 1 Turn on power open or close the 1 Check the faulty connector of and bad defrosting due to faulty door check that motor fan housing and reassemble wrongly contact and insertion bad connector operates If it operates motor fan assembled parts ...

Page 91: ...asket attachment Replacement should compartment Check door assembly conditions conditions and replace it be done when it Faulty gasket Door assembly and replacement cannot be repaired Faulty assembly 3 Overcooling in the refrigerator Check refrigerator compartment Replace faulty parts compartment is overcooled when button Faulty damper in the refrigerator pressed on weak compartment Check parts ar...

Page 92: ...artment 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 intermittentl...

Page 93: ... inserting 6 Adjust fan to be in the center of conditions in pipes bell mouth of the fan guide 2 3 Touch pipes with hands or screw 7 Leve a clearance between driver check the change of interfering parts and seal gaps in sound the structures 8 Reassemble the parts which make 3 Fan operation sound in the freezer 3 1 Check fan insertion depth and sound compartment blade damage 9 Leave a clearance if ...

Page 94: ...ion with rubber 4 Moving wheel vibration 2 2 Check capillary tube touches and restrainer if it is severe 5 Other structure and parts cover back especially compressor and pipe vibration 3 1 Check compressor stopper 4 Replace compressor stopper if it vibration vibtates severely 4 1 Check vibration of front and rear moving wheels 5 1 Touch other structures and parts Irregular sound 1 It is caused by ...

Page 95: ...ain the principles of freezing cycles Water boiling or It happens when refrigerant passes Check the sound when compressor is Explain the principles of freezing cycles flowing sound orifice in accumulator internal pipes by turned on and refrigerant flowing phenomenon by the pressure difference between Check the sound when compressor is internal pressure difference condenser and evaporator turned of...

Page 96: ...nyl wraps Chedk food cleanliness Clean the refrigerator and set button at strong Plastic Odor Odors of mixed food and plastic Check wet food is wrapped with Clean the refrigerator odors plastic bowl and bag Persuade customers not to use It happens in the new refrigerator plastic bag or wraps with wet food or odorous foods Odor from the Odor from the old deodorizer Check the deodorizer odors Dry th...

Page 97: ...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 LED between Main PCB m...

Page 98: ...characteristics table of sensor in circuit Freezer sensor is Confirm the color of sensor in Repair main PCB explanation substituted for other circuits main PCB sensor sensor housing sensor housing 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 ref...

Page 99: ...ion Foreign materials in AC Check AC damper baffle Remove foreign damper baffles visually materials Ice formation on AC Check if AC damper Heater Replace AC damper damper baffles wire is cut with a tester or refrigerator control Box Assembly Defective refrigerator Defective refrigerator Check the resistance of Replace refrigerator Refer to sensor sensor sensor parts refrigerator sensor with a test...

Page 100: ...n 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 input wire is cut or bad connector Check input wire with a tester Reconn...

Page 101: ... Lead Wire associated with lever Repair lead wire dispenser are not Main PCB to lever switch switch with a tester dispensed Defective lever switch parts Refer to door switch in parts repair guide Replace lever switch Defective photo coupler IC parts Check voltage change at photo coupler Replace photo output terminals with lever switch coupler IC or PCB pressed It is OK if voltage change is between...

Page 102: ...Vacuum Torr Below 0 03 ref Note Only applicable to the model degree equipped with reverse flow protect plate Vacuum EA High and low Vaccum efficiency can be improved by Pressure sides are operating compressor during evacuation evacuated at the same time for models above 200 Vacuum EA Use R134a To protect The rubber pipes for R12 refrigerant shall piping exclusive mixing of be melted when they are ...

Page 103: ...ile refrigerator operates scales punching off flier Weld carefully after inlet pinching gas welding machine Check leak at weld joints Electronic Leak Detector Minute leak Use electronic leak detector Driver Ruler Big leak Check visually or fingers Note Do not use soapy water for check Check cooling capacity Check radiator manually to see if warm Check hot line pipe manually to see if warm Check fr...

Page 104: ...l leak will happen 3 Replacement of drier 1 Be sure to replace drier with R134a only when repairing pipes and injecting refrigerant 4 Nitrogen blowing 1 Weld under nitrogen atmosphere in order to prevent oxidation inside a pipe welding Nitrogen pressure 0 1 0 2 kg cm2 5 Others 1 Nitrogen or refrigerant R134a only should be used when cleaning inside of cycle pipes inside and sealing 2 Check leakage...

Page 105: ...not necessary because it does not produce oxidized scales inside pipe because of its short welding time 3 Replacement of drier Inserting a capillary tube Measure distance with a ruler and put a mark 12 3 0 on the capillary tube Insert tube to the mark and weld it KEYPOINTING Observe the sequence for removal of refrigerant If not compressor oil may leak KEYPOINTING Welding without nitrogen blowing ...

Page 106: ...easure the weight Calculate the weight of refrigerant charged into the bombe by subtracting the weight of an evacuated bombe KEYPOINTING If power is applied during vacuum degassing vacuum degassing shall be more effective Operate compressor while charging refrigerant It is easier and more certain to do like this KEYPOINTING Be sure to charge the refrigerant at around 25 C Be sure to keep 5g in the...

Page 107: ...nser Drier Evaporator Bombe Rubber 1 Observe the safety precautions for gas handling 2 Use JIG or wet towel in order to prevent electric wires from burning during welding In order to prevent insulation break and accident 3 The inner case shall be melted and insulation material polyurethane shall be burnt if not cared during welding inner case parts 4 The copper pipe shall be oxidized by overheatin...

Page 108: ...r Copper Silver Brazer Silver Brazer Copper Brazer Copper Brazer Copper Brazer Coppper Brazer Silver Brazer Silver Brazer PIPE ASSEMBLY JOINT PIPE ASSEMBLY HOT LINE Freezer PIPE ASSEMBLY JOINT CONDENSER ASSEMBLY WIRE PIPE ASSEMBLY SUCTION DRIER ASSEMBLY CAPI TUBE Copper Brazer Copper Silver Brazer Silver Brazer Copper Brazer Copper Brazer Copper Brazer Coppper Brazer Silver Brazer 1 Type A 2 Type ...

Page 109: ... 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 3600RPM This sound is...

Page 110: ...g also makes sound When water Noise from motor sounds Whizz freezes to ice freezing sounds such as click click are heard When ice is being ejected sounds like Whizz produced by a motor to rotate an ice tray and ice dropping and hitting ice bank sounds are also heard Noise when supplying water Explain the principles of water supplied to dispenser When the water supply button in the dispenser is pre...

Page 111: ...istics of ice cream The freezing point of ice cream is below 15 C Therefore ice cream may melt if it is stored in the door rack Store ice cream in a cold place or set the temperature control button of a freezer at strong position Refrigeration is too strong Check the position of temperature control button Check if refrigeration is strong in whole area of the refrigerator or partly near the outlet ...

Page 112: ...tton 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 if temperature is set at MID If hot air comes into the refrigerator fine frost forms as cold air mi...

Page 113: ...ainer or in the wrap When is the power connected When should the power be connected You can connect the power right after the installation But if the refrigerator was laid flat during transportation for a long period of time and the refrigerant and compressor oils are mixed up then this will affect badly the performance of a refrigerator Be sure to connect the power 2 3 hours after refrigerator is...

Page 114: ...r or bracket hinge pin is deformed during assembling freezer and refrigerator doors fix two screws Tap Tite Screw M6 Hinge L fixing screw in the hole of upper hinge 3 Disconnect upper hinge from a hinge supporter by grasping the front part of upper hinge and lifting up Hinge Assembly U in arrow direction A and pull forward in arrow B direction Be careful as the door may be fallen down 4 Lift up th...

Page 115: ... forward carefully 5 Check foam PU sticking conditions around a shroud F U and F L during assembling If damaged torn or badly sticked assemble with a new one after sealing well 4 ICEMAKER ASSEMBLY 1 How to disassemble 1 Remove the cover and ice bucket from the freezer door 2 Disassemble the Motor AC and icemaker Caution When pulling out the Motor AC do not damage the water injector 3 Disconnect ho...

Page 116: ...Cover and Valve Screw 5 Separate the housing and pull out the valve 6 FAN AND FAN MOTOR DISASSEMBLY METHOD 1 Using a short screwdriver loosen one SCREW in DRAIN PIPE ASSEMBLY and one connected to the MOTOR COVER 2 Pull and separate the FAN ASSEMBLY and MOTOR turning counterclockwise based on the MOTOR SHAFT The assembly is in the reverse order of the disassembly and take special care for the follo...

Page 117: ...disconnect its housing 5 Loosen fixed screws with a screwdriver and pull the funnel assembly to disconnect You can change LED Lamp in this disassemble state 6 The duct cap assembly can be disconnected if the hold lever connecting screw is loosened with a screwdriver 7 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 i...

Page 118: ...ISPLAY 5 FRAME FUNNEL ASSEMBLY 6 FRAME FUNNEL 7 LEVER DISPENSER 8 BUTTON LEVER 9 SWITCH MICRO 10 PCB ASSEMBLY DISPLAY 11 SUPPORTER HOLDER 12 SHEET DUCT 13 SPRING LEVER 14 SOLENOID ASSEMBLY 15 SPRING 16 LEVER HOLDER 17 CAP ASSEMBLY DUCT 18 CAP DUCT 19 DISPENSER LEVER 20 FOAM NEW 21 RUBBER CAP 22 FUNNEL ASSEMBLY 23 FUNNEL 24 DECO COVER 25 DECO PANEL 26 DECO DRAIN 27 DECO DRAIN COVER 17 Cap Assembly ...

Page 119: ...rt a right side and push a home bar hinge on left side HOW TO DISASSEMBLE AND ASSEMBLE 119 3 7 8 6 5 4 5 4 2 1 1 DOOR ASSEMBLY H BAR 5 HINGE ASSEMBLY H BAR 2 GASKET H BAR 6 COVER LEVER 3 COVER H BAR 7 HOLDER ASSEMBLY BRACKET 4 COVER FRAME 8 SWITCH PUSH BUTTON 9 DISPLAY COVER ASSEMBLY GW C227 B227 Fixing a screw to the display by using a screwdriver Separate the display by using a flyer ...

Page 120: ...FREEZER DOOR PART GW P227 L227 Optional part EXPLODED VIEW 120 210C 210B 210B 202A 200A 201A 203A 611B 600A 606A 612A 614A 610A 205F 205A 205C 205B 205D ...

Page 121: ...FREEZER DOOR PART GW C227 B227 Optional part EXPLODED VIEW 121 210C 210B 210B 210B 210B 202A 200A 201A 203A 501A 279A 279B 207A 205F 205A 205C 205B 205D ...

Page 122: ...GR P227 C227 Optional part EXPLODED VIEW 122 264C 264A 264B 241B 241C 241A 617A 240D 232A 260A 147A 231A 233A 230A 266A 267A 267B 263A 263B 265A 239A 402C 251A 261A 147C 240A 243A 240B 243A 240C 243A 205F 205A 205C 205B 205D ...

Page 123: ...REFRIGERATOR DOOR PART GW L227 B227 Optional part EXPLODED VIEW 123 241B 241C 241A 240D 232A 147A 231A 233A 230A 239A 147C 240A 243A 240B 243A 240B 243A 205F 205A 205C 205B 205D ...

Page 124: ...103A 312A 402A 401A 272A 130A 135B 101A 120D 125A 125A 126A 120C 408A 302B 316B 400A 128C 128D 128C 128D 128G 128H 128G 128H 128L 128M 128E 128F 131C 131E 131B 131D 154A 131J 132A 131H 137B 136D 136A 136B 403A 136C 137C 137A 152A 404A 625A 616G 619A 616F 627A 619A 138A 138B 127B 127A 121A 121B 127A 621B 621A ...

Page 125: ...E 166E 409B 150B 165A 165A 166C 166A 166B 167A 167C 167B 167D 168A 120E 504A 624A 624A 624A 270B 271B 271C 103A 116A 272B 155A 146B 626B 626A 626C 101B 151C 150A 624C 401A 146A 402B 152A 162A 162B 177A 177B 151F 115B 115A 142D 142D 142A 142C 142B 170A 140A 140A 171B 171A 141B 141A ...

Page 126: ...tional part EXPLODED VIEW 126 300A 310B 307A 304A 306A 310A 317B 317A 313A 301A 307A 104A 303C 303B 303A 407B 500A 502B 502A 308A 308C 308B 309C 403B 309B 309A 505A 407A 305C 305B 305C 305B 305A 406A 105C 105D 105E 105F 316A ...

Page 127: ...DISPENSER PART Optional part EXPLODED VIEW 127 278A 278F 405A 275A 276A 281B 280A 501A 276B 278B 278C 280B 276B 402D 290A 278J 278H 278G 281A 207B 207A ...

Page 128: ...P No MFL38540601 MAR 2007 Printed in Poland ...

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