REFRIGERATOR SERVICE MANUAL
Contents
1. R10 E 1 is 5 E HALL 4 2 in 5 R11 16 2KF gt 2 ICE MAKER SENSOR t 1 This circuit is a circuit used to embody functions such as ice removing full ice detection level noise and ice making tem perature detection of ice making tray ice making container 23 7 5 Main PWB Assembly and Parts List 7 5 1 MAIN PWB Oe HIN SS Ga S J 681181082 24 7 5 2 Replacement Part List NO DWG NO DESCRIPTION SPEC MAKER REMARK 6870JB2039 PWB MAIN FR 1 DS 1107A 000 SAN t 1 6 N 6170982002 TAE SUNG TRANS 6630JB8001B 66300880046 JAE EUN CON1 CON2 6630880040 CONS NO O A 0177 82004 7 409 TOSHIBA IC 0224820048 OIRH178050B OIKE780500A 1 BA17805T REGULATOR 2 KIA78S05P ROHM KEC IC3 OIRH178120A OINE781200B 1 BA17812T uPC7812AHF REGULATOR ROHM NEC 2 10 axe 7042004 01 0010100 KIA7042P BMR 0101D RESET IC KODENSHI 4 11 6920JB2003A GSN 1 OMRON RY1 12 13 570 00012 MURATA 570 00012 1572 16 6102409075A IL JIN 2 5 4710 14 ISAMHWA 14 6102JB8001B 1 INR14D621 VARISTOR IL JIN 15 16 6102J88001A J972 00001D 2 SVC621D 142. 3 10 223 100V 104 eee 9 7 104 T ocg 1 m 104 ji R8 6 ICE MAKER 19 R7 4 7K TEST S W 0 2K 104 T T a R10 5 20 2 R9 1 H es CC11 L 4 104 T 2 ep 1 11 R11 16 2KF 5 2k T ICE MAKER SENSOR 104 1 77 L 02 o 47KX3 CONZ CON101 EE 21 a a a 4 4 Swi 5 22 53 3 5 WATER SUPPLYING TIME CONTROL S W 23 4 2 2 sw3 4 1 1 m L J 4 10 12 13 16 24 25 26 27 8 EXPLODED VIEW amp REPLACEMENT PARTS LIST Y The parts of refrigerator and the shape of each part are subject to change in different localities Y Capacitors and fuse are optional parts GR T622 GR T722 f 2 A BK x 4 w N 28 Option 29 Handle Assembly ackage 30 ICE MAKER PART 31 BUYER NAME LGEUS COLOR TITANIUM MODEL NAME LRTBC1825T RUN DATE 02 07 26 LG REFERENCE NO GR T622ATC ATICLGX S AL LOCA NO PART NO LG DESCRIPTION SPECIFICATION REMARK 6923 6923JB1001A MICOM ASSEMBLY 103A 3650JA2004U HANDLE BACK 103B 3650JA2004V HANDLE BACK 103C 3551JA2082D COVER ASSEMBLY LOWER 104A 4441JA3001A CASTER ASSEMBLY 105A 5250JA2009A DRAIN PIPE Z 106A 4779JA2003B LEG ASSEMBLY ADJUST 110A
3. 10 15 COMPRESSOR AND ELECTRIC 5 10 POSITIVE TEMPERATURE COEFFICIENT AND OVERLOAD 11 DEFROST TIMER iseis ais is dai das 11 OTHER ELECTRIC COMPONER N T S shi 12 SERVICE DIAGNOSIS CHART aa as ie deep asi aa sa da dies 13 REFRIGERATING GY CLE asa aiuta 14 15 OPERATION PRINCIPLE AND REPAIR METHOD OF ICE MAKER 1 1 16 27 EXPLODED VIEW vita 25 i 28 31 REPLACEMENT PARTS LIST 32 SAFETY PRECAUTIONS Please read the following instructions before servicing your refrigerator 1 Check the refrigerator for current leakage 7 Close the top door before opening the bottom door 2 To prevent electric shock unplug before servicing Otherwise you might hit your head when you stand up 3 Always check line voltage and amperage 8 When tilting the refrigerator remove any materials on the refrigerator especially the thin plates ex Glass 4 f you use any kind of appliance check regular current shelf or books 9 When servicing the evaporator wear cotton gloves This is to prevent injuries from th
4. Figure 8 2 Pull out the door gasket to remove from the door foam assembly 3 2 DOOR SWITCH 1 To remove the door switch pull out it with a slotted type driver as shown in figure 9 2 Disconnect the lead wire from the switch LEAD WIRE DOOR SWITCH Figure 9 3 3 THERMOSTAT 1 Remove Control Box R by loosening 2 screws attached to ceiling of Refrigerator compartment Figure 10 2 Separate the thermostat and dial knob F 3 Remove the thermostat by disconnecting the lead wire Figure 10 3 4 FAN AND FAN MOTOR 1 Remove the freezer shelf If your refrigerator have an Ice Maker disassemble the Ice maker first 2 Remove the grille by pulling it out and by loosening a screw 3 Remove the Fan Motor assembly by loosening 4 screws and disassemble the shroud 4 Pull out the fan and separate the Fan Motor and Bracket FAN MOTOR 9 2 SHROUD FAN Figure 12 3 5 DEFROST CONTROL ASSEMBLY Defrost control assembly consists of Defrost Thermostat and FUSE M Defrost Thermostat functions to defrost automatically and it is attached to metal side of the Evaporator and senses Temp Fuse M is a safety device for preventing over heating of the Heater when defrosting At the temperature of 77 C it stops the emission of heat from the Heater 1 Pull out the grille assembly 2 Separate the connector connected with the Defro
5. 5 CIRCUIT DIAGRAM CONTACTING POINT COVER BIMETAL CONTACTING POINT HEATER TERMINALS P dt BIMETAL ADJUST SCREW Figure 21 HEATER Ref No LRTBC1825T CIRCUIT DIAGRAM SCH MA DE MONTAGE Ref No LRTBC2025T CIRCUIT DIAGRAM SCH MA DE MONTAGE THERMOSTAT Thermostat 1 0 0 4 1 EARTH PART C I a4 BK Partie la terre i4 Minuterie de D cong lation BK DEFROST TIMER Tce MAKER haa ONOFF SW tinterrupteur marche de glaci re DOOR S W R Interrupteur R de Porte Droit Interrupteur F de Porte Droit Ai 72 SOLENOID CE VALVE Elecrovave de Glace poe B ICE MAKER KIT Jeu de Glaci re T CE MAEA MOTOR Marco Glaci re EN POWER SUPPLY CORD Cordon d alimentaion FAN MOTOR Moteur par ventilateur SE GN YL p bt 1 GN EARTH PART Partie la terre Il Y HEATER SHEATH Fusible M EIS Gaine de Chauffage r 08 H WATER SUPPLYING TIMER CONTROL SW Frerupteu de Commande de ruler Dstbuton d eau pk COMPRESSOR Compresseur LAMP F part lampe F partie PWB 55 MAIN Montage de PWB principal ICE MAKER OPTION
6. normal after the ice making tray and returning to the level with the ice removing motor Water supply valve conduct current Water supply pump normally operates Water supply line is normally Replacement of Defect of water supply water supply valve connected 20 7 4 Explanation of ice maker circuits 7 4 1 Power circuit Vass 1 STOP S W 104 CONT 5 N4004 g 1 4 C2 IC3 1 T 7812 T 75 T 28 VDD No dl an CEI a 00 2 3 4 p 1107 25 1 F TM 10 T 104 6 4 1 dd 1 ft ey 14 Vss 1 1 5 5 The secondary party of transformer consists of power 12Vdc for driving display and relay and power 5Vdc supplying power to MICOM and IC In this case voltage at each part is as follows Part Both ends of VA1 Both ends of CE2 Both ends of CE3 Voltage 115Vac 12Vdc 5Vdc VA1 is parts for preventing over voltage and noise and plays a role of protecting elements of the secondary part of trans former as the inside of element becomes short and is broken and power fuse is cut off when power of more than 175V is applied 7 4 2 Vibration circuit XIN CST4 00MGW tos O R2 IC1 L qH MICOM Circuit used for synchronous clock generation for transmitting receiving in
7. If OLP doesn t operate when PTC is not cooled Compressor Motor is worn away and causes circuit short and fire Therefore always use a properly attached OLP 4 2 6 Note to Use PTC Starter 1 Be careful not to allow over voltage and over current 2 Do not strike Don t apply a forcible power or strike 3 Keep apart from any liquid If liquid such as oil or water away enters the PTC PTC materials may fail due to insulation breakdown of the material itself 4 Don t change PTC at your convenience Don t disassemble PTC and case If the exterior to the PTC starter is damaged resistance value is altered and it may cause poor starting of the compressor motor may cause b Use a properly attached PTC 4 3 OLP OVERLOAD PROTECTOR 4 3 1 Definition of OLP 1 OLP OVERLOAD PROTECTOR is attached to the Compressor and protects the Motor by cutting the current to the Motor if the temperature rises and activates the bimetal spring in the OLP 2 When over voltage flows to Compressor motor the Bimetal works by heating the heater inside the OLP and the OLP protects Motor by cutting off current which flows to the Compressor Motor 4 3 2 Role of the OLP 1 The OLP is attached to the Hermetic Compressor used for the Refrigerator and prevents the Motor Coil from being started in the Compressor 2 Do not turn the Adjust Screw of the OLP in any way for normal operation of the OLP Composition and connection diagram of OLP
8. and check cooling operation Check Compressor Clogged by dust Frost formed normally 14 YES Y Gas leakage Check the leakage point General Control of Refrigerating Cycle NO ITEMS UNIT STANDARDS PURPOSES REMARKS 1 Pipeand Min Pipe within 1 hour To protect The opening time should be reduced piping system Comp within 10 minutes moisture to a half of the standards during rain opening time Drier within 20 minutes penetration and rainy seasons the penetration of water into the pipe is dangerous 2 Welding Nitrogen Weld under Nitrogen To protect oxide Refer to repair note in each part pressure atmosphere scale formation R 134a refrigerant is more Nz pressure susceptible to leaks than R 12 and 0 1 0 2 kg cm requires more care during welding Do not apply force to pipes before and after welding to protect pipe from cracking 3 Ne sealed Confirm Confirm air leaking sounds To protect In case of evaporator parts if it parts leak when removing moisture doesn t make sound when removing Sound usable penetration cap blow dry air or Ne gas for more No sound not usable than 1 min and use the parts 4 Refrige Evacuation Min More than 40 minutes To remove moisture ration time Cycle Vacuum Torr Below 0 03 ref Note Only applicable to the model degree equipped with reverse flow protect plate Vacuum EA
9. Compressor is impossible or poor Separate the PTC Starter from Compressor and measure the resistance between No 5 and 6 of PTC Starter with a Tester or Wheatstone Bridge Figure 21 Replace PTC Starter The resistance value is 0 or several hundred Q The value is Separate the OLP from Compressor and check the resistance value between two terminals of OLP with a Tester Figure 22 Figure 22 6 3 DEFROST TIMER Position the Cam Shaft to the point of first click sound and check the current flowing between terminals No 1 brown and No 2 bright orange Next position the Cam Shaft to the point of second click sound and check the current flowing between terminals No 1 brown and No 4 black Figure 23 Replace the Turn the Cam Shaft No Timer Shake about 3 times Loud click d Replace the with holding the Cam HEUS Defrost Timer Shaft and Body softly Normal operation of the Defrost Timer is impossible The resistance is Replace the Defrost Timer Replace the Defrost Timer The resistance is No defrosting rosung 0Q or variable The resistance is about 220V 50Hz 20KQ 115V 60Hz 7 8KQ Check the another electric components Poor cooling Figure 23 6 4 OTHER ELEC
10. Figure 3 TO THE VACUUM PUMP PRESSURE j GAUGE E Figure 3 Air evacuating from the system begins as soon as the pump starts The refrigeration system must be kept under vacuum until the reading on the low pressure gauge indicates vacuum 0 absolute 1 atm 760 mm hg In any case it is advisable to keep the pump running for about 30 minutes Figure 3 If considerable leakage occurs it will be necessary to stop the vacuum pump and to add a small quantity of Freon to the system If vacuum should not be obtained pressure gauge can t fall to 1 atmosphere start the refrigeration unit and find the leakage with special leak finder When the defective soldering point is visible repair it after opening the extension tube valve and reestablishing the normal outside pressure inside the group Because the melted alloy is sucked into the tubes and blocks them the pressure must be rebalanced when vacuum is in the system when soldering As soon as the vacuum operation is over add the quantity in grams of R 134a to the refrigeration system Remember that every system has an exact quantity of R 134a that can be added with a tolerance of 5 grams Figure 4 TO THE R 134a CYLINDER TO THE REFRIGERATION SYSTEM DIL C 9 Figure 4 Before performing this operation if the vacuum pump refilling cylinder are connected make sure that
11. cool normally 0 lt WHOLE Freezer Flowing sound of refrigerant Equal to ambient Normal discharging of CLOG compartment and is not heard and frost isn t temperature Refrigerant 9 Refrigerator don t cool formed MOISTURE Cooling operation Flowing sound of refrigerant Lower than Cooling operation restarts CLOG stops periodically is not heard and frost melts ambient when heating the inlet of temperature capillary tube 8 COMP Freezer and Low flowing sound of A little higher Low pressure at high side m RESSION Refrigerator refrigerant is heard and ambient of compressor due to low 2 m don t cool frost forms in inlet only temperature refrigerant level mo 5 NO COMP No compressing Flowing sound of refrigerant Equal to ambient No pressure of high pressure 9 m RESSION operation is not heard and no frost temperature part in the compressor Y Leakage Detection e Observe discharging point of refrigerant which may be in the oil discharging part in the compressor and hole of evaporator runs or not Check if compressor YES Check if frost Y forms or not in Evaporator Frost formed normally Check if oil No frost leaks or not or forms in inlet only Observe the discharged Normal amount Moisture Clog Faulty Compressor amount of Refrigerant No or much amount Inject refrigerant to compressor
12. system is running the suction pressure must be stabilized between 0 30 to 0 6 0 10 to 0 4 atmosphere 1 SPECIFICATIONS 1 Ref No LRTBC1825T ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DOOR DESIGN All Rounded VEGETABLE TRAY Transparent Drawer Type DIMENSIONS mm 754 5 x 735 1732 W xD XH COMPRESSOR PTC Starting Type NET WEIGHT kg 90 EVAPORATOR Fin Tube Type COOLING SYSTEM Fan Cooling CONDENSER Wire Condenser TEMPERATURE CONTROL Knob Dial REFRIGERANT R 134a 155 g Full Automatic LUBRICATING OIL 15010 280 cc DEFROSTING SYSTEM Heater Defrost DEFROSTING DEVICE SHEATH HEATER With a Timer FREEZER 25 W LAMP DOOR FINISH Vinyl Coated Metal REFRIGERATOR 40W HANDLE TYPE Bar INNER CASE ABS Resin INSULATION Polyurethane Foam 2 Ref No LRTBC2025T ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DOOR DESIGN All Rounded VEGETABLE TRAY Transparent Drawer Type DIMENSIONS mm 754 5 x 788 1732 W xD XH COMPRESSOR PTC Starting Type NET WEIGHT kg 93 EVAPORATOR Fin Tube Type COOLING SYSTEM Fan Cooling CONDENSER Wire Condenser TEMPERATURE CONTROL Knob Dial REFRIGERANT R 134a 155 g Full Automatic LUBRICATING OIL 15010 280 cc DEFROSTING SYSTEM Heater Defrost DEFROSTING DEVICE SHEATH HEATER With a Timer tie FREEZER 25 W DOOR FINISH Vinyl Coated Metal REFRIGERATOR 40W HANDLE TYPE Bar INNER CASE ABS Resin IN
13. the valve placed between the vacuum pump and the refilling tube is closed in order to keep the Freon for addition to the system Figure 5 FILLING OR VALVE TO BE OPENED CHARGE TUBE WHEN REFILLING Q TO THE REFRIGERATION SYSTEM 2 THE CHARGE CYLINDER VALVE TO BE CLOSED AFTER VACUUM TO THE VACUUM Figure 5 PUMP In addition check the graduated scale on the cylinder for the quantity of R 134a to be added for example if we have 750 grams of Freon in the cylinder and must add 140 grams to the group this amount will be reached when R 134a has dropped to 610 grams remembering that the indicator shows a lower limit of meniscus Do this after choosing the scale corresponding to the gas pressure different scales reported as the same gas pressure indicated by the pressure gauge on the top of the column To make R 134a flow into the system open the valve placed at the base of the cylinder connected to the filling tube The amount of Freon cannot be added to the system all at once because it may cause a blocking of motor compressor Therefore proceed by adding the original quantity of about 20 30 grams and close the valve immediately The pressure rises and the motor compressor must start sucking the gas and lowering the pressure again Open the valve again maintaining the same manner until reaching to the quantity of R 134a established for the system being charged When the
14. 046E 6 TROUBLESHOOTING 6 1 COMPRESSOR AND ELECTRIC COMPONENTS p S Remove the PTC Rating Voltage MES OWE Source Starter from the 10 Compressor and measure the voltage between Terminal C of Compressor and Terminals 5 or 6 of PTC YES No Voltage OLP disconnected Replace OLP Check connection condition Reconnect Applied voltage isn t in the range of Rating Advise the customer to use a regular Voltage 10 transformer Check the resistance among M C S C and M S in Motor Compressor Check the resistance of Motor Compressor Replace Compressor Check the MES resistance of PTC Starter Check the resistance of two terminals in PTC Starter Replace PTC Starter YES OLP works within YES 30 sec in forcible OLP operation by turning instant power on and off Check if applying a regular OLP Check OLP Replace OLP NO Measure minimum starting voltage after 5 min for balancing cycle pressure and cooling the PTC Check starting state Components start in the voltage of Rating Voltage 10 below 10 6 2 PTC AND OLP Observation value is Check another 220V 50Hz 22013096 electric components 115V 60Hz 6 80 30 240V 50Hz 3303096 127 220V 60Hz 220 30 Normal operation of
15. 6930JB1007C THERMOSTAT 110C 4940JD1007C KNOB DAMPER 113B 4974JA2033A GUIDE DUCT 113C 4970JA3016A SPRING W 113D 4986JA2024A GASKET DOOR 120A 4995JA1024K CONTROL BOX ASSEMBLY R 1208 4994JD1037A CONTROL BOX R 120C 4940JD1006E KNOB DAMPER 140A 5027JA1041E SHELF ASSEMBLY NET 140B 5027JA1029F SHELF ASSEMBLY R 140D 5026JA2024E SHELFE NET 140E 5026JA2024F SHELF NET 141A 5027JA1019Q SHELF ASSEMBLY R 14B 5027JA1029F SHELF ASSEMBLY R 141D 5026JA2020C SHELF NET 141E 5026JA2020F SHELF NET 145A 4930JA2032A HOLDER SHELF 145B 4930JA2031A HOLDER SHELF 149A 5026JA1108B SHELF ASSEMBLY F 151A 3391JA1036G TRAY ASSEMBLY VEGETABLE 151B 3391JA1036H TRAY ASSEMBLY VEGETABLE 151C 4940JA2012A KNOB DAMPER 151D 4940JA2011A KNOB DAMPER 154A 3551JA1027D COVER ASSEMBLY T V 158B 4930JA1034A HOLDER LAMP 158C 3550JA2096A COVER LAMP 170A 3390JD1050G TRAY MEAT 15720 1TCG0403232 SCREW TAPPING COUNTER SUNK HEAD 200A 3581JA1045Q DOOR ASSEMBLY F 201A 5433JA0076F DOOR FOAM ASSEMBLY F 203A 4987JA1024A GASKET ASSEMBLY DOOR 205A 5004JD1110B BASKET DOOR 210A 4620JA2011A STOPPER DOOR 211A 3651JA2212A HANDLE ASSEMBLY PACKAGE 212A 3650JA2053A HANDLE F 32 BUYER NAME LGEUS COLOR TITANIUM MODEL NAME LRTBC1825T RUN DATE 02 07 26 LG REFERENCE NO GR T622ATC ATICLGX S AL LOCA NO PART NO L
16. A 1SVC2710 14A ISAMHWA SAMHWA 6102J88003A 2 INR14D271 JIN 05 1 6212A090028 VA1 17 0DD414809BB SWITCHING DIODE 1N 4148 c 2 ROHM DS 18 ODD400409CC DIODERECTIFIER 1N4004 Pc 2 ROHM 01 4 19 6600JB8003A DIP S W 7 OTAX Sw 20 OIRH622200A DRIVE IC BA6222 ROHM IC5 21 0CE2286J618 2200uF 35V CE1 22 0CE1081H618 1000uF 25V CE2 23 OCE1071H638 100uF 25V ELE CAPACITOR 1 SAM HWA CE4 24 0CE4771H618 470uF 25V YOUNG 25 0CE2271F638 220uF 16V CES 26 0CE4761H638 47uF 25V 27 28 0 02251 409 0 1020 908 223 100 102 25V MYL CAPACITOR SEIL CM1 CM3 29 0 2230 908 CER CAPACITOR 7 YANG 30 0 1040 908 104 50V CC1 12 31 32 ORD0682H609 68J 1 2W 33 0 020016608 2KJ 1 4W R9 lt 11 R6 34 108047016609 2 3 D0NG SUNG YO R3 5 8 R14 16 35 108010046608 R2 36 ORN16126408 R METAL FILM 16 2KF RF1 37 38 39 OTR106009AC TRANSISTOR KRAIO6M KRA2206 K E C Q1 40 OTR102009AB TRANSISTOR KRCIO2M KRC1202 K E C Q2 41 435607015 0 6 5mm 0 6 8mm J01 J04 J06 J097J11 CC13
17. A 5300JB1050R HEATER SHEATH 115V 270W 420A 4680JB1029A MOTOR ASSEMBLY REF FAN 115V 60HZ 5074AA 5074JA1023A BANK ICE 600A 5989JA1004B ICE MAKER ASSEMBLYKIT 601A 3390JA1118A TRAY ICE 602A 4810JA1022A BRACKET ICE MAKER 603A 3550JA3095A COVER SENSOR 603B 5410JA3011A INSULATION BACK 604A 4510JA3003A LEVER ICE MAKER 605A 5988JA1001A ICE MAKER MECH UNIT 607A 4930JA3068A HOLDER BRACKET 611A 3551JA2074A COVER ASSEMBLY TRAY 616D 5210JA3005J TUBE PE 616E 5210JA3021A TUBE INJECT 618A 4810JA3036A BRACKET COVER 619A 5220JA2009D VALVE WATER 620A 1NZZJA3005A NUT DRAWING 620A 1NZZJA3005A NUT DRAWING 622A 5040JA3025A BUSHING INJECT 623A 4770JA3001A BAND MECH 37 4 3 P No 3828JD8332Y JUL 2002 Printed in Korea
18. EVAPORATOR ASSEMBLY 304A 3550JA1117A COVER BACK M C 307A 2521JA1006C COMPRESSOR ASSEMBLY 308A 6748JA3001A P T C 309A 6750JA3001A O L P 310A 3550JA2158A COVER P T C 310B 4620JA3014A STOPPER CORD 312A 5040JA3044A BUSHING SEAT 314A 4620JA3009A STOPPER COMP 315A 3103JA1015B COMP BASE ASSEMBLY STD 317A 5851JA2003B DRIER 318A J719 00006A HOLDER DRIER 319A 3390JA1115A TRAY DRIP 319C 4974JA1046A GUIDE FAN 323B 5403JA1026A CONDENSER ASSEMBLY WIRE 328A 4J03020A BUSHING DAMPING 329A J753 00011A FAN ASSEMBLY 329C 5901JA1005B FAN ASSEMBLY 330B 4998JA1010A SHROUD F 332A 3531JA1018L GRILLE ASSEMBLY FAN 36 BUYER NAME LGEUS COLOR TITANIUM MODEL NAME LRTBC2025T RUN DATE 02 07 26 LG REFERENCE NO GR T722ATC ATICLGX S AL LOCA NO PART NO LG DESCRIPTION SPECIFICATION REMARK 334A 3550JA2095A COVER PIPE 334B 5040JA3039A BUSHING PIPE 401A 6615JB2003F CONTROLLER ASSEMBLY 404A 4681JB1011P MOTOR ASSEMBLY REF FAN 405A 4810JA3007A BRACKET MOTOR 6 J756 00008B BUSHING MOTOR N 406A 6600JB1005C SWITCH PUSH 406B 6600JB1002K SWITCH PUSH 408A 6621JB2005A SOCKET ASSEMBLY LAMP 409A 6912JB2004F LAMP INCANDESCENT 120V 25W 4098 6912JB2004C LAMP INCANDESCENT 125V 40W 410C 6914JB2006G TIMER 120V 410G 0CBZJB2001E CAPACITOR DRAWING 250VAC 12UF 411A 6411JB1013B POWER CORD ASSEMBLY 418
19. G DESCRIPTION SPECIFICATION REMARK 212G 4140JD2001C NAME PLATE P H 230A 3581JA8475C DOOR ASSEMBLY R 231A 5433JA0077L DOOR FOAM ASSEMBLY R 233A 4987JA1024B GASKET ASSEMBLY DOOR 241A 5004JD1119A BASKET DOOR 241B 5005JA1001B BASKET ASSEMBLY DOOR 241C 50040011128 BASKET DOOR 2410 5004JD1111B BASKET DOOR 243A 4620JA3010B STOPPER DOOR 244A 3650JA2054A HANDLE R 244B 3650JA2055A HANDLE DECO 244C 3650JA2056A HANDLE DECO 281A 3550JA2132K COVER HINGE 281B 4775JA2031B HINGE ASSEMBLY U 281E 5006JA3054H 282B 4774JA2005A HINGE ASSEMBLY C 2820 1WPZJA3007A WASHER DRAWING 282E 5006JA2011U 282H 5006JA2020B CAP HINGE 2838 4775JA2026A HINGE ASSEMBLY L 301A 5421JA1032A EVAPORATOR ASSEMBLY 304A 3550JA1117A COVER BACK M C 307A 2521C B6282 COMPRESSOR ASSEMBLY LA62LBCMC2 D DREF 308A 6748C 0004D P T C ASSEMBLY P6R8MD 250 MURATA 309A 6750C 0004M O L P 4TM414KFBYY 520 310A 3550JA2087A COVER P T C 312A 5040JA3044A RUBBER SEAT 314A 4620JA3009A STOPPER COMP 315A 3103JA1015A COMP BASE ASSEMBLY STD 317A 5851JA2003B DRIER 318A J719 00006A HOLDER DRIER 319A 3390JA1115A TRAY DRIP 319C 4974JA1046A GUIDE FAN 323B 5403JA1026A CONDENSER ASSEMBLY WIRE 327A 4J04328A RUBBER DAMPING 328A 4J03020A RUBBER DAMPING 329A J753 00011A FAN ASSEMBLY 329C 5901JA1005B FAN ASSEMBLY 330B 4998JA1010A SH
20. High and low pressure sides Vacuum efficiency can be improved are evacuated at the same by operating compressor during time for models above 200 evacuation Vacuum EA Use R 134a exclusive To protect mixing The bushing pipes for R 12 refrigerant piping manifold of mineral and shall be melted when they are used for ester oils R 134a refrigerant causes of leak Pipe EA Use R 134a exclusive To protect R 12 coupler refrigerant mixing Outlet R 134a exclusive Socket Plug R 134a exclusive 5 Refrigerant EA Use R 134a exclusively Do not mix with Do not weigh the refrigerant at too weighing Weighing allowance 5g R 12 refrigerant hot or too cold an area Note Winter 5g 77 25 C is adequate Summer 5g Make Copper bombe Device filling refrigerant Socket 2SV Plug 2PV R 134a Note Do not burn O ring bushing during welding 6 Drier Use R 134a exclusively for To remove the replacement R 134a refrigerator moisture from Use R 12 exclusively for pipe inside R 12 refrigerator Replace drier whenever repairing refrigerator cycle piping 7 Leak check Do not use soapy water for Defect Check oil leak at refrigerant leak check It may be sucked into the pipe by vacuum refrigerant leak area area Use electronic leak detector if oil leak is not found The electronic leak detector is very sensitive to halogen gas in the air It also can detect R 141b in urethane Practice many
21. JA2011A KNOB DAMPER 154A 3551JA1027D COVER ASSEMBLYT V 158B 4930JA1034A HOLDER LAMP 158C 3550JA2096A COVER LAMP 170A 3390JD1050H TRAY MEAT 15720 1TCG0403232 SCREW TAPPING COUNTER SUNK HEAD 200A 3581JA1045Q DOOR ASSEMBLY F A 201A 5433JA0076F DOOR FOAM ASSEMBLY F 203A 4987JA1024A GASKET ASSEMBLY DOOR 205A 5004JD1110B BASKET DOOR 210A 4620JA2011A STOPPER DOOR 35 BUYER NAME LGEUS COLOR TITANIUM MODEL NAME LRTBC2025T RUN DATE 02 07 26 LG REFERENCE NO GR T722ATC ATICLGX S AL LOCA NO PART NO LG DESCRIPTION SPECIFICATION REMARK 211A 3651JA2212A HANDLE ASSEMBLY PACKAGE 212A 3650JA2053A HANDLE F 212G 4140JD2001C NAME PLATE P H 230A 3581JA8475C DOOR ASSEMBLY R 231A 5433JA0077L DOOR FOAM ASSEMBLY R 233A 4987JA1024B GASKET ASSEMBLY DOOR 241A 5004JD1119A BASKET DOOR 241B 5005JA1001B BASKET ASSEMBLY DOOR 241C 50040011128 BASKET DOOR 241D 5004JD1111C BASKET DOOR 243A 4620JA3010B STOPPER DOOR 244A 3650JA2054A HANDLE R 244B 3650JA2055A HANDLE DECO 244C 3650JA2056A HANDLE DECO 281A 3550JA2132K COVER HINGE 281B 4775JA2031B HINGE ASSEMBLY U 281E 5006JA3054H 282B 4774JA2005A HINGE ASSEMBLY C 282C 1WPZJA3007A WASHER DRAWING 282E 5006JA2011U 282H 5006JA2020B CAP HINGE 283B 4775JA2026A HINGE ASSEMBLY L 301A 5421JA1032A
22. JUMP WIRE 0 6 10mm J02 J05 J07 JOB J12 J14 0 6 12 5mm 0 6 15mm 42 4920J83003A HEAT SINK 12V J572 00004A IC2 43 4920JB3001A HEAT SINK SV J572 00002A 44 1SBF0302418 SCREW ASSEMBLE WI ITH H SINK 45 49111001 SOLDER ALMIT KR 19RMA HEE SUNG SOLD 46 49111004 SOLDER LEAD BAR 6 47 59333105 FLUX AUTO JS71 KOKI 48 25 7 6 PWB DIAGRAM DinD4 CON mas 1 e I 7812 F on 00 ect ME sun 3 T 7 TIM 35V 25V so 5 I M STOP S W 77 TEST RY1 G5N 1A 1 E 5m eRe 5 P40 WATER VALVE Q2 SCR ICE 102 l Q1 10K KRA106M TOSHIBA TMP87C409N IC1 XIN CST4 00MGW 77 XOUT 4 1 3 BMR 0101D RESET C65 2 104 L 26 P42 SDA SO P43 P10 P11 P67 AIN7 4 7 7 100uF 4 7KX2 25V 17 gs REVERSED 6 z CON2 18 FORWARD 5 t 8 1 R6 ICE MAKER oe 68 1 2W 41 105 i MOTOR 4 6222
23. Partie d option de Glaci re CAPACITOR gt Condensateur R CAPACITOR S Condensateur 8 BL BL EARTH PART Partie la terre CAPACITOR STARTER Partie de Condensateur D marreur de P T C LAMP F PART CAPACITORS THE PLUG TYPE EARTH PART AND ICE MAKER OPTION PART ON CIRCUIT DIAGRAM ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITIES PARTIE LAMPE F CONDENSATEURS TYPE DE PRISE PARTIE DE TERRE ET PARTIE EN OPTION DE GLACI RE SUR LE CH MA DE MONTAGE SONT SUJETS CHANGER DANS LES LOCAUX DIFF RENTS THERMOSTAT Thermostat Minuterie de D cong lation 13 4 EARTH PART 0 BK Partie a la terre DEFROST TIMER Tice maken SW V mater de glaci re teur F de Porte Droit DOOR S W R Interrupteur R de Porte Droit ieee r gll 2 Thermostat de D cong lation ent pa SOLENOID ICE VALVE Elecrovalve do Glace BL ICE MAKER KIT Jeu de Glaci re TP CE NAKER NOTOR Moteur de Godo gt EN FAN MOTOR Moteur par ventilateur S o 2 5 POWER SUPPLY CORD Cordon d alimentaion COOLING FAN MOTOR Moteur de Reid surcharges GN YL 1 GN D KEMMER TESTS teper desa de Glite Gaine de Chau
24. Plate Heater Replace indicated component 12 6 4 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY Cooling is Is the power cord unplugged from the outlet Plug to the outlet impossible Check if the power S W is set to OFF Set the switch to ON Check if the fuse of power S W is shorted Replace fuse Measure the voltage of power outlet If voltage is low correct wiring Cooling ability Check if the set is placed close to wall Place the set with the space of about 10 cm 4 inches is poor Check if the set is placed close to stove gas Place the set apart from these heat cooker and direct rays appliances s the ambient temperature high or Make the ambient temperature below the room door closed Check if put in is hot Put in foods after cooled down Did you open the door of the set too often Don t open the door too often and close or check if the door is closed up it firmly Check if the Control is set to WARM Set the control to mid position Foods in the Is food placed in cooling air outlet Place foods in high temperature section Refrigerator Front Part are frozen Check if the Dial is set to COLD Set the dial to MID Is the ambient temperature below 5 C Set the dial to WARM Dew or ice Is liquid food stored Seal up liquid foods with wrap forms inside Check if put in hot Put in foods after cooled down the set Did yo
25. REFRIGERATOR CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL LRTBC1825T COLOR TITANIUM LRTBC2025T CONTENTS SAFETY PRECAUTIONS 2 SERVICING diii T 3 Hlddelilewle c aNu oa ds 4 PARTS IDENTIFICATION m nii 5 015 55206 6 7 DOOR usse Rua o 6 DOOR SWITCH eee Eee e eee ben 6 THERMOSTAT tum E esed eph n 6 FAN AND EAN MOTOR eerte rette tete te ee tte eem iet eh eas tton rr dle e aie forte teet rt 7 DEFROST CONTROL ASSEMBIN icc vcd te tht e n eh dp rdi ce reus T e eto deat 7 LAMP a tilt ettet eh ta de deant hah ps i d de dla e ce deoa 7 CONTROL BOX RE inim ettet ftn et tb it erc faf ttd Sii deg cci te T te e eats 7 ADJUSTMENT insistit 8 COMPRESSOR 4 it eiie than teft atc i srt Aide atte ol Sc de tede ea fcm tte eoa 8 POSITIVE TEMPERATURE 5 77 8 OVERLOAD PROTEO TOR e At nus te eek ttl a qha Tua bt ote ata i e e ot mh Tua aati 9 CIRCUIT DIAGRAM e 9 IiUEIenilicm
26. ROUD F 332A 3531JA1018L GRILLE ASSEMBLY FAN 334A 3550JA2095A COVER PIPE 334B 5040JA3039A RUBBER PIPE 33 BUYER NAME LGEUS COLOR TITANIUM MODEL NAME LRTBC1825T RUN DATE 02 07 26 LG REFERENCE NO GR T622ATC ATICLGX S AL LOCA NO PART NO LG DESCRIPTION SPECIFICATION REMARK 401A 6615JB2003F CONTROLLER ASSEMBLY 404A 4681JB1011P MOTOR ASSEMBLY REF FAN 405A 4810JA3007A BRACKET MOTOR 405C J756 00008B RUBBER MOTOR N 406A 6600JB1005C SWITCH PUSH 406B 6600JB1002K SWITCH PUSH 408A 6621JB2005A SOCKET ASSEMBLY LAMP 409A 6912JB2004F LAMP INCANDESCENT 120V 25W 4098 6912JB2004C LAMP INCANDESCENT 125V 40W 410C 6914JB2006G TIMER 120V 410G 0CBZJB2001E CAPACITOR DRAWING 250VAC 12UF 411A 6411JB1013B POWER CORD ASSEMBLY 418A 5300JB1050R HEATER SHEATH 115V 420A 4681JB1013G MOTOR ASSEMBLY REF FAN 5074AA 5074JA1023A BANK ICE 600A 5989JA1004B ICE MAKER ASSEMBLY KIT 601A 3390JA1118A TRAY ICE 602A 4810JA1022A BRACKET ICE MAKER 603A 3550JA3095A COVER SENSOR 603B 5410JA3011A INSULATION BACK 604A 4510JA3003A LEVER ICE MAKER 605A 5988JA1001A ICE MAKER MECH UNIT 607A 4930JA3068A HOLDER BRACKET 611A 3551JA2074A COVER ASSEMBLY TRAY 616D 5210JA3005J TUBE PE 616E 5210JA3021A TUBE INJECT 618A 4810JA3036A BRACKET COVER 619A 5220JA2009D VALVE WATER 620A 1NZZJA3005A NUT DRA
27. SULATION Polyurethane Foam 2 PARTS IDENTIFICATION FREEZER COMPARTMENT Freezer Shelf Automatic Ice Maker Ice Cube Box Freezer Temperature Control Dial REFRIGERATOR COMPARTMENT Temperature Control Dial Lamp Shelves Egg Box option Snack Corner Crisper Used to keep fruits and vegetables fresh and crisp Base Grille 1 Bend down 2 Push the grille toward the refrigerator 3 Three protecting parts should be beneath the bottom plate while pushing the grille Lamp Freezer Door Bin Door Cooling On the refrigerator door the cold air passageway is installed to supply cold air to the doorside of the refrigerator compartment Can Server Dairy Corner Adjustable Door Bin Refrigerator Door Rack Leveling Screw Inside 3 DISASSEMBLY 3 1 DOOR e Freezer Door 1 Remove the hinge cover by pulling it upwards 2 Loosen hexagonal bolts fixing the upper hinge to the body and lift the freezer door lt HINGE COVER HINGE Figure 6 3 Pull out the door gasket to remove from the door foam assembly GASKET Figure 7 e Refrigerator Door 1 Loosen hexagonal bolts attaching the lower hinge to the body to remove the refrigerator door only LOWER HINGE
28. TRIC COMPONENTS Y Cooling is impossible Compressor gt Check if current flows to Cause doesn t run the following components Poor contacting and gas leakage b Starting devices Shorted or broken a Thermostat Poor contacting or shorted d Compressor coil gt Coil shorted Replace e Defrost Timer Poor contacting gt indicated component 77 or shorted f Circuit parts Check a staring Low voltage Raise the voltage voltage Check if current flows Poor contacting Replace to starting devices and broken indicated component Check current flowing in sub coil of Compressor c OLP Compressor runs poorly Check capacity of OLP Lack of capacity The items described Coil of motor Replace above are normal Compressor the compressor V Cooling ability is poor Fan motor Check current flowing doesn t run of the door S W Poor contacting Replace indicated component Check current flowing in the Fan Motor COLI shorted Much frost is built upon the EVAPORATOR Check the running Running is poor Coil is shorted condition of Timer Replace indicated component Check current flowing of the following components Defrost Thermostat Fuse M Check current flowing of the following components L cord TE
29. WING 620A 1NZZJA3005A NUT DRAWING 622A 5040JA3025A RUBBER INJECT 623A 4770JA3001A BAND MECH 34 BUYER NAME LGEUS COLOR TITANIUM MODEL NAME LRTBC2025T RUN DATE 02 07 26 LG REFERENCE NO GR T722ATC ATICLGX S AL LOCA NO PART NO LG DESCRIPTION SPECIFICATION REMARK 6923 6923JB1001A MICOM ASSEMBLY 103A 3650JA2004U HANDLE BACK 103B 3650JA2004V HANDLE BACK 103C 3551JA2082D COVER ASSEMBLY LOWER 104A 4441JA3001A CASTER ASSEMBLY 105A 5250JA2009A DRAIN PIPE Z 106A 4779JA2003B LEG ASSEMBLY ADJUST 110A 6930JB1007C THERMOSTAT 110C 4940JD1007C KNOB DAMPER 113B 4974JA2033A GUIDE DUCT 113C 4970JA3016A SPRING W 113D 4986JA2024A GASKET DOOR 120A 4995JA1022H CONTROL BOX ASSEMBLY R 120B 4994JD1037B CONTROL BOX R 120C 4940JD1006E KNOB DAMPER 140A 5027JA1041J SHELF ASSEMBLY NET 1408 5027JA1030E SHELF ASSEMBLY R 140D 5026JA2016E SHELFE NET 140E 5026JA2016F SHELF NET 141A 5027JA1019U SHELF ASSEMBLY R 1418 5027JA1030E SHELF ASSEMBLY R 141D 5026JA2012C SHELFE NET 141E 5026JA2012F SHELF NET 145A 4930JA2032A HOLDER SHELF 145B 4930JA2031A HOLDER SHELF 147A 5074JA1008A TRAY EGG 147C 3550JA1077A COVER BANK 149A 5026JA1108A SHELF ASSEMBLY F 151A 3391JA1036G TRAY ASSEMBLY VEGETABLE 151B 3391JA1036H TRAY ASSEMBLY VEGETABLE 151C 4940JA2012A KNOB DAMPER 151D 4940
30. e maker assy is turned on 16 7 2 Function of Ice maker 7 2 1 Initial control function 1 The level of the ice removing tray ice removing container after completing the MICOM initialization in the initial POWER ON returning to electricity failure and turning off of ice making stop switches Namely detection lever operates up and down 2 The level of ice removing container is detected with high low output signal of hall sensor In another words operation is performed in order to keep a level by operating ice removing motor so that high or low volt age could be applied in the MICOM PIN 3 No signal change of hall sensors until a minute after operating the ice removing motor should be considered as failure In this case stop the automatic ice remover and then reset the ice maker initialization if considered as normal after perform ing continuous check in a cycle of an hour 4 Keeping of the ice removing tray ice removing container should be considered initial control is completed 7 2 2 Water supply control function 1 Supply water into the ice removing tray by operating the ice solenoid placed at the machine room of refrigerator using the time check function if considered as the level is kept after performing a horizontal operation of the ice making tray after the ice removing control normal ice removing control ice removing control of test function is completed 2 The quantity of water supply is determined by suppl
31. e sharp evaporator fins voltage and capacity 5 Don t touch metal products in the freezer with wet hands This may cause frostbite 6 Prevent water from following onto electric elements in the mechanical parts 10 Leave the disassembly of the refrigerating cycle to a specialized service center The gas inside the circuit may pollute the environment SERVICING PRECAUTIONS AIR RECHARGING IN COMPRESSOR Test the refrigeration system connecting it electrically before refilling operation It is necessary to ascertain the function of the motor compressor and identify the defects immediately If defects have been found empty the old system of possible R 134a residue by breaking off the end of the extension piece at its narrow point Figure 1 Replace the filter and any damaged components Unsolder and pull off the piece remaining inside the service tube and then attach an complete extension with male Hansen and at last solder it to the same tube again Figure 2 CHARGE TUBE FEMALE POINT TO BE BROKEN XTENSION HANSEN MALE HANSEN SERVICE TUBE EXTENSION SOLDERING POINT Figure 1 Figure 2 It is necessary to execute the soldering operation with valve open so that the fumes caused by oil residue can come out freely without blowholes between two tubes during the heating the of the point to be soldered The extension fitted with the male Hansen is connected to the female fitting of the vacuum pump tube
32. ed left refer to the followings to solve the complaint Check if dew forms in Defrosting the freezer is poor Check Refrigerating The cycle Cycle gt is faulty The operation of Check the gt the Thermistor is Thermistor poor 13 Replace the Components of defrosting circuit Repair the cycle Replace the Thermistor 6 5 REFRIGERATING CYCLE Y Troubleshooting Chart STATE OF STATE OF THE TEMEEBATUHE EVAPORATOR Or THE COMPRESSOR PARTIAL Freezer Low flowing sound of A little higher Refrigerant level is low due LEAKAGE compartment and Refrigerant is heard and than ambient to a leak Refrigerator don t frost forms in inlet only temperature Normal cooling is possible m cool normally when injecting of Refrigerant the regular amount gt o WHOLE Freezer Flowing sound of refrigerant Equal to ambient No discharging of Refrigerant LEAKAGE compartment and is not heard and frost isn t temperature Normal cooling is possible Refrigerator don t formed when injecting of Refrigerant cool normally the regular amount o PARTIAL Freeze Flowing sound of refrigerant A little higher Normal discharging of o CLOG compartment and is heard and frost forms than ambient refrigerant Refrigerator don t in inlet only temperature The capillary tube is faulty m
33. enser 4 1 2 Composition The compressor includes overload protection The PTC starter and OLP overload protector are outside the compressor Since the compressor is manufactured to tolerances of 1 micron and is sealed in a dust and moisture free environment use extreme caution when repairing it 4 1 3 Note for Usage 1 Be careful not to allow over voltage and over current 2 No Strike If applying forcible power or strike dropping or careless handling poor operation and noise may occur 3 Use proper electric components appropriate to the Compressor 4 Note to Keep Compressor If Compressor gets wet in the rain and rust in the pin of Hermetic Terminal the result may be poor operation and poor contact may cause 5 Be careful that dust humidity and welding flux don t contaminate the compressor inside when replacing the Compressor Dust humidity and flux due to welding which contaminates the cylinder may cause lockage and noise 4 2 PTC STARTER 4 2 1 Composition of PTC Starter 1 PTC Positive Temperature Coefficient is a no contact semiconductor starting device which uses ceramic material consisting of BaTiOs 2 The higher the temperature is the higher the resistance value These features are used as starting device for the Motor 4 2 2 Role of PTC Starter 1 PTC is attached to Hermetic Compressor used for Refrigerator Show Case and starting Motor 2 Compressor for household refrigerator ap
34. es in the normal cycle of ice making ice removal returning to the level water supply if water supply is completed TEST S W To check on the amount of water being supplied press the Test button Hold for 0 5 seconds 19 7 3 Failure diagnosis method of ice maker Replacement of MAIN PCB DC power 5V 12V is normally output Defect of power terminal Check DC power 5V 12V Normally perform ice removing and returning to the level if pressing TEST S W for more than 0 5 second Check resistance values of both ends of ice making sensor Pin for PCB CON2 1 2 PIN Ice making sensor Defect between PIN NO 4 of IC1 boards Replacement of ice making sensor Defect of ice making sensor Replacement of ice making kit Defect of ice making kit Resistance values at both ends of ice removing motor Replacement of 47 8 pin of PCB CON 7 8 MAIN ECB is 18 220 Drive circuit of ice removing motor IC5 and auxiliary circuit is normal IC Defect between PIN NO 20 of IC1 boards Be sure ice removing and returning to the level when pressing the TEST S W Replacement of ice making kit Defect of ice making KIT TEST S W Both ends of TEST S W amp 3 6 pin of PCB CON2 3 6 are at open status TEST S W Defect between boards PIN NO 19 of IC1 Water supply is
35. ffage OVER LOAD PROTECTOR Pr WATER SUPPLYING TIMER CONTROL SW Iniorupteur de Commando de Minero Dsibuion deau L EARTH PART Partie la terre T lampe F partie pk COMPRESSOR Compresseur CN a PWB ASSY MAIN Montage de PWB principal MET N MS I 3 Lye BL ICE MAKER OPTION PART Partie d option de Glaci re GAPACITOR R Condensateur R CAPACITORS Condensateur S BL BL EARTH PART Partie la terre CAPACITOR PART P T C STARTER Partie de Condensateur D marreur de P T C LAMP F PART CAPACITORS THE PLUG TYPE EARTH PART AND ICE MAKER OPTION PART ON CIRCUIT DIAGRAM ARE SUBJECT TO CHANGE IN DIFFERENT LOCALITIES PARTIE LAMPE F CONDENSATEURS TYPE DE PRISE PARTIE DE TERRE ET PARTIE EN OPTION DE GLACI RE SUR LE CH MA DE MONTAGE SONT SUJETS CHANGER DANS LES LOCAUX DIFF RENTS WHITE BL BLUE RD RED PK PINK WH Blanc BL Bleu RD Rouge 6 BLACK BN BROWN PR PURPLE YL YELLOW BK Nor BN Brun PR Pourpre YL Jaune BRIGHT ORANGE GY GRAY GN GREEN BO Orange Clair GY Gris GN Vert 3854JD1033H WH WHITE BL BLUE 0 PK PINK BK BLACK BN BROWN PR PURPLE YL YELLOW BK Noir BO BRIGHT ORANGE GY GRAY GN GREEN 1 BO Orange Clair WH Blanc BL Bleu RD Rouge 6 BN Brun PR Pourpre YL Jaune GY Gris GN Vert 3854JD1
36. formation of the inside logic elements of IC and basic time generation for calculating time Rated parts must be used as counting time is changed at the IC1 or the OSC1 does not operate if SPEC would be changed 7 4 3 Reset circuit x 4 ms oy BMR 0101D 5 cce 5 04 ji d The reset circuit is a circuit that initializes various parts such as RAM etc inside of the MICOM IC1 and starts the whole of function from the initial status and low voltage is applied for a constant time 10ms at the reset terminal of the MICOM at the start of power input The reset terminal is at 5V during general operation the MICOM does not operate in the defect of the reset IC 21 7 4 4 Load drive circuit 1 Load drive status check RY1 POWER CON G5N 1A 47K 05 5 E IN4148 4 7K 10K WATER VALVE ICE KRC102M 01 10K KRA106M Load Type Water Valve Measurement Location A ON 1V below Condition OFF 12V 22 15 pag IC1 7 4 5 ICE MAKER drive circuit IC1 MICOM 4 7KX2 104 CE4 7 72 oe 25V REVERSED 6 5 CON2 FORWARD 5 R6 8 ICE MAKER e _165 Oki tel M MOTOR BA6222 5 10 223 100V L E 1 1 Ly s L 104 I R8 4 7K 6 TEST S W
37. n the short of ices stored Output signal of hall sensor OFF In full ices stored Output signal ON of hall sensor OFF Operation of ice detecting axle sed Seo 4 ore Ice detection level 30 8 0 10 32 41 53 58 80 160 170 Lock Ice making Ice detection Ice removal lock Lock original 2 1 sec Level Returning status to level 8 3 sec lt Timing chart for ice removal gt 18 7 2 5 Test Function 1 Function used compulsory operation for the purpose of performing operation test service and cleaning This test function is performed if pressing the test switch mounted on the automatic ice maker itself for 0 5 second or more The test button operates when the test function is not input but at the level status It does not perform ice removal control and water supply control if ices are full during operation of test function Pressing the test button for more than 0 5 seconds at the level the status immediately performs ice removing operation irrespective of the ice generation conditions of the ice making tray Caution shall be exercised as water may overflow if operating the test function at the water status that ice making is not done A cycle of water supply is performed at the level adjusting operation after ice removing operation Therefore the test button allows to check problems in ice removing operation level operation and water supply The test function operat
38. plies to single phase induction Motor For normal operation of the single phase induction motor in the starting operation flows in both main coil and sub coil After the starting is over the current in subcoil is cut off The proper features of PTC play all the above roles So PTC is used as a motor starting device 4 2 3 PTC Applied Circuit Diagram e According to Starting Method for the Motor OVERLOAD PROTECTOR O L P COMPRESSOR MOTOR HERMETIC TERMINAL PTC STARTER RSIR Figure 19 4 2 4 Motor Restarting and PTC Cooling 1 For restarting after power off during normal Compressor Motor operation plug the power cord after 5 min for pressure balance of Refrigerating Cycle and PTC cooling 2 During normal operation of the Compressor Motor PTC elements generate heat continuously Therefore if PTC isn t cooled for a while after the power has been shut off the motor will not restart 4 2 5 Relation of PTC Starter and OLP 1 If the power is off during operation of Compressor and the power is on before the PTC is cooled instant shut off within 2 min or unplugging and reconnecting the PTC isn t cooled and a resistance value grows As a result current can t flow to the sub coil the Motor can t operate and the OLP operates by flowing over current in only in the main coil 2 While the OLP repeats on and off operation about 3 5 times PTC is cooled and Compressor Motor performs normal operation
39. s stored at the ice bank container for storing are not fully filled the hall sensor are at the Off status low within 3 6seconds after rotating positively the ice making motor In this case it positively rotates CW the ice removing motor and keeps the ice making tray at the maximum dis tortion status and makes ices be separated from the ice making tray In this case ice detecting lever automatically oper ates lifting operation with ice removing operation Ice removing control positively rotates CW the ice removing motor and stops it for a second as it considers as maximum distortion point ice detecting axle 160 if the sensor signal changes from the Off status low to the On status high after 3 6 seconds pass Ice removing control positively rotates CW the ice removing motor at the cycle of an hour if problems in ice making motor or hall sensor are found and performs initial operation or operates initialization of product if normal Ice removing control stops for a second at the maximum distortion status of the ice removing tray container for storing ice Step that the ice removing tray stops for a second and then returns to the level It returns to the level status returns to the ice removing tray by reversely rotating the ice making motor The cycle of water supply gt ice making gt ice removing gt returning to the level if becoming the level status Maximum distortion point I
40. st Control assembly and replace the Defrost Control assembly after cutting the Tie Wrap Figure 14 SHROUD F DEF THERMO Figure 13 HOLDER FUSE Figure 14 3 6 LAMP REFRIGERATOR ROOM LAMP Figure 16 1 3 6 1 Refrigerator room lamp 1 Unplug the power cord from the outlet 2 Remove refrigerator shelves 3 Release the hooks on both ends of the lamp shield and pull the shield downward to remove it 4 Turn the lamp counterclockwise 5 Assemble in reverse order of disassembly Replacement bulb must be the same specification as original Max 40 W FREEZER ROOM LAMP Figure 16 2 3 6 2 Freezer room lamp 1 Unplug refrigerator or disconnect power 2 Reach behind light shield to remove bulb 3 Replace bulb with a 25 watt appliance bulb 4 Plug in refrigerator or reconnect power 3 7 CONTROL BOX R 1 First remove all shelves in the refrigerator and Control Box R by loosening 2 screws Figure 17 2 Remove the Control Box R by pulling it downward 3 Disconnect the lead wire on the right position and seperate timer themostat Lamp socket etc 4 ADJUSTMENT 4 1 COMPRESSOR 4 1 1 Role The compressor intakes low temperature and low pressure gas evaporated from evaporator of the refrigerator and condenses this gas to high temperature and high pressure gas and then plays delivering role to cond
41. times before using this type of detector 15 7 OPERATION PRINCIPLE AND REPAIR METHOD OF ICE MAKER This manual describes function of models adhering Ice Maker 7 1 OPERATION PRINCIPLE 7 1 1 Operation principle of Ice Maker Power Input 1 Keep a level of ice removing tray with initial control 0 power Initial Control Wait until when water within ice removing tray becomes cold after starting ice making operation Icing Control Ice removing Control Perform ice check operation to ensure that ice is filled at an ice bank by carrying out reverse turning and forward turning the ice removing motor Perform icing removing operation for dropping ices of ice removing tray from the ice bank If ices are not fully filled Water Supply Control Perform ice removing control after supplying water to the ice removing tray by operating solenoid of the ice valve p p p D Test Control As operation for the assembly line and service of refrigerator pressing a I Maker Test Switch allows to operate in the order of initial ice removing water supply control step 1 Turning the ice making stop switch off stops ice making function of the ice maker and thus no ice is made 2 Ice making function stops at the time of selecting ice making function and release of the ice making function allows to perform the initial control function again Make sure the switch on the ic
42. tom of the ice making tray 2 Ice making control begins after completing water supply control or initial control 3 It is considered that ice making is completed if temperature of ice making sensor arrives at 6 C after 60 minutes pass from the time water is supplied to the ice making tray 4 It is considered that ice making is completed if temperature of ice making sensor arrives at below 7 C after 10 minutes pass at the above status 17 7 2 4 Ice removing control function 1 Ice removing control means operation to separate ice within ice making tray ice making container after ice making is completed Step to check ices stored at the ice bank container for storing ice are fully filled It is considered as they are fully filled if signals of the hall sensor are at the On status high before 3 6seconds after rotating positively the ice making motor In this case the ice making motor remains at the waiting status without performing ice removing function Perform ice detecting operation after rotating positively the ice making motor in the cycle of an hour if the full ice status is detected Perform water supply control function after completing ice removing function in the short of ices stored Reversely rotating the ice removing motor in the storage of full ices and then let the motor stop at the position of the ice making or waiting status lce removing control performs ice removing operation immediately if ice
43. u open the door of the set too Don t open the door too often and close often or check if the door is closed it firmly Dew forms Check if ambient temperature and humidity Wipe dew with a dry cloth This occurrence in the Exterior Case of surroumcling air are high Is there gap in the door gasket is solved naturally in low temperature and humidity Fill up the gap Abnormal noise Is the set positioned in a firm and even place Are any unnecessary objects set in the back side of the set Check if the Drip Tray is not firmly fixed Check if the cover of mechanical room in below and front side is taken out Adjust the Adjust Screw and position in the firm place Remove the objects Fix it firmly on the original position Place the cover at the original position Door does not close well Check if the door packing is dirty with filth such as juice Is the set positioned in a firm and even place s too much food putted in the set Clean the door packing Position in the firm place and level the Adjust Screw Keep foods not to reach the door Ice and foods smell unpleasant Check if the inside of the set is dirty Did you keep fragrant foods without wrapping It smells of plastic Clean the inside of the set Wrap fragrant foods The new products smells of plastic but it will go away after 1 2 weeks e In addition to the items describ
44. ying water for a constant using the dip switch Water Supply Quantity Table gt SWITCH NO Remarks SWITH SW1 SW2 SW3 OFF OFF OFF I ON OEE OFF The quantity of water supply may differ depending on OFF ON OFF the setting status of the dip switch or on water pressure ON ON OFF as water supply method is of a pattern of direct connec OFF ON tion to water cock ON ON SWITH OFF OFF ON ON ON SW1 sw2 3 3 The change of the quantity of water supply setting may be done according to the changed time even after changing it without powering off In the change of dip switch during water supply it is done according to the water supply time previ ously established and then done according to the additionally changed time from the next water supply Line indicating the adequate amount of water supply Water supply control switch Adequate water level Adjust the water supply control switch to adjust the amount of water being supplied Make sure it is adjusted to meet the line indicating the adequate amount of water supply 7 2 3 Ice making control function 1 Ice making control is related with when considered as water within ice making tray ice container turns into ice com pletely after completing water supply operation and performs ice making completion operation by detecting temperature of ice making tray ice making sensor is mounted on the bot
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