Manual Service Lg - ApplianceAssistant.com
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1. 11Ft Descripci n GR 382R LRTP1231W Part Number Part Number HANDLE BACK 3650JJ2003A 3650JJ2003B 103B HANDLE BACK 3650JJ2003E 3650JJ2003F 104C LEG ASSEMBLY 4981JA3006A 4981JA3006A 105A DRAIN PIPE Z 5250JA2009A 5250JA2009A 106A ADJUSTABLE LEG 3J04686A 3J04686A 106B ADJUSTABLE LEG 3J04686A 3J04686A 110A PWB PCB ASSY DISPLAY 6871JB2036A 6871JB2036A 110B ICE TRAY GUIDE 4974JJ1003A 4974JJ1003A REFRIGERATOR CONTROL BOX 4995JJ1001E 4995JJ1001F 120A ASSEMBLY 120B REFRIGERATOR CONTROL BOX COVER 4994JJ1001A 4994JL1001A 120E DUCT INSULATION 5208JJ1006A 5208JJ1006A 120G DUCT INSULATION 5208JJ1005A 5208JJ1005A 125A CE TRAY 3390JJ1003A 3390JJ1003A 125H CE TRAY SUPPORTER 4980JJ1001A 4980JJ1001A 125L ICE TRAY HOLDER 4930JJ3001A 4930JJ3001A 129A DUCT GUIDE 4974JJ1001A 4974JJ1001A 131A ICE BIN 5074JJ1001A 5074JJ1001A 149A FREEZER SHELF 5026JJ1001B 5026JJ1001B 1498 TRAY 3390JJ1002A 3390JJ1002A 149C REFRIGERATOR SHELF ASSEMBLY 5027JJ2001A 5027JJ2003A 149E REFRIGERATOR SHELF ASSEMBLY 5027JJ2002A 5026JJ1002A 151A VEGETABLE TRAY 3390JJ1001A 3390JJ1001A 154A VEGETABLE TRAY COVER 3550JJ1003B 3550JJ1003B 158C LAMP COVER 3550JJ1004B 3550JJ1004A 200A FREEZER DOOR ASSEMBLY 3581 JJ8009B 3581JJ8001D 201A FREEZER DOOR FOAM ASSEMBLY 5433JJ0011A 5433JJ0003D 203A FREEZER DOOR GASKET ASSEMBLY 4987JJ1001A 4987JJ1001A 205A DOOR BASKET 5004JJ1001B 5004JJ1001B 210A DOOR STOPPER2. 10 Refrigerator Control 11 Reversible Door 12 13 Adjustments 14 15 Compressor 14 14 Overload Protector OLP 15 Troubleshooting 16 21 Compressor amp Electrical Components 16 amp OLP 17 Other Electrical Components 18 Service Diagnosis Chart 19 Refrigerant Cycle 20 21 MICOM circuit amp operation 22 39 Refrigerator Explode
3. oo SI FYUNLVWYAdWAL HOOd HO LON 10004 SI YOLOW 1 UOLVY39I4434 S9SO 9 Joop ans eg 001 JUNLVMI4WIL H3Z33MJ SI 43Z334J ees GOHLSIN MO3HO 318no L AQd3NW3 IN3lINOO ONIMO3HO OL SLNIOd JO 31V1S NOILVOISISSV19 33 7 4 MAIN PWB ASSEMBLY AND PARTS LIST 7 4 1 MAIN PWB ASSEMBLY 34 7 5 PWB DIAGRAM COOLING FAN MOTOR MELTING DEFROST FUSE HEATER 38 CST4 00M T EI San 24 P15 2 7K T uem A308 ose I 2 Dem rt CIRCUIT DIAGRAM TOSHIBA TMP87C409N IC1 CON2 a 0191 ach REFRIGERATOR SENSOR DEFROST SENSOR e Lo lo o 2K 225 Paz 6 PRCRI 15 pea l8 47K TEST PIN 7 11 19 22 25 2 1 39 parts of refrigerator the shape of each part may vary by market area Capacitors and fuse are optional parts Optional parts 8 Exploded View SS NO Twist 110 125 125H 131 Standard 125 3 Refrigerator Shelves Steel 136A 136B 149D Steel 136C 1360 2 Ice Maker Plastic 149C 1 Freezer Shelf Plastic 149A 40 41 9 Service parts list
4. apno 2 YOLVN39 no asny sizounos 39 9939 9323383 4499 9373344 GOH L3N MIIHI 319NOYL LN3SLNOD 9NIMO3HO Ol SLNIOd JO 31V1S NOILVOIJISSV 712 Replace the PWB when there s no trouble after checking the contents of trouble 7 4 TROUBLE SHOOTING 32 L33S V9 Se day YOO 9Iquiessees POLIODUI Bur ees SI UIWUYIENY aysel Joop ay HOSN3S 1SOJ3Q jo ulyoeye ay Y98YD ONILSOY430 5 s oq 43Lv3H way amp pexooiq PPI 3dld 3dld 199849 Nive SI z pue ONILSOHJ3G ON ONILSOY430 HOOd NIYIN JO ZAM e2e des HOSN3S 330 eoejdes SI YSLVSH YOLOANNOO NIVA S YHOSNAS 1SOY430 yeay JO pue uOl 9 uuoO 1004 ay oou S90 JojeJodena 499Y9 uonoeuuooSsIp asnd 3505 39N1VI3IANAL AYNLVYAdWAL 3 1 V3H 9 H3lV3H eoe des 009 episur peddns 2 ONILSOY 430 Buleq 002 Jo peeds YOOd 885 uezoy HOlIVHOdVA3 pue eu 3589uO NV seog s nunduul pax90 q
5. Lc SERVICE MANUAL REFRIGERATOR ATTENTION Before start servicing carefully read the safety instructions in this manual MODEL S GR 382R LRTP1231W s s Contents Safety Precautions 1 Service Precautions 2 3 Specifications 4 Feature Chart 5 Circuit Diagram 6 7 Cooling Systems 8 Product Disassembly 9 11 Doors 9 Door Switch 9 Electronic Control Display 9 Freezer Fan 10 Defrost Control 10 Lamp
6. 15 min OFF Defrosting failure Cut or disconnected wire of defrosting heater or temperature fuse indicated at least 4 hours later after the error occurs 24 7 2 7 2 1 POWER CIRCUIT CON The second part of the Transformer is composed of the power supply for the display and relay drive 12 Vdc and for the MICOM and IC 5 The voltage for each part is as follows VOLTAGE VA1 prevents overvoltage and noise When 175 V or higher power is pplied the inside elements are short circuited and broken resulting in the blowout of the fuse in order to protect the elements of the secondary part of the Transformer 25 7 2 2 OSCILLATION CIRCUIT cst4 oomew MM El oSCIL MICOM Ly 4 xn This circuit is to generate the base clock for calculating time and the synchro clock for transmitting data to and from the inside logic elements of the IC1 MICOM Be sure to use the exact replacement parts since the calculating time by the IC1 may be changed or it will not work if he OSC1 SPEC is changed 7 2 3 RESET CIRCUIT RESET The reset circuit is for allowing all the functions to start at the initial conditions by initializing various parts including the RAM inside the MICOM 1 when the power is initially supplied or the power supply to th
7. Check if the power switch is set to OFF Set the switch to ON No Cooling 3 Check if the fuse of power switch is Replace a regular fuse shorted 4 Measure the voltage of power outlet If the voltage is low check the wiring or call an electrician Poor Cooling 1 Check if the refrigerator is placed close to a wall 2 Check if the refrigerator is placed close to a stove oven or in indirect sunlight 3 15 the ambient temperature high or the room door closed 4 Check if putting in hot food 5 Did you open the refrigerator door too Place the set with the space of about 10 cm Place the set apart from these heat Sources Is the ambient temeperature within spec above 10 C or 40 F Put food in after it cools Don t open the door too often and close it firmly 1 15 the ambient temperature too low 2 Tomake the freezer colder set the COLD Poor Freezing 10 C 40 F AIR CONTROL to 7 and set the R control button PWB to MAX 3 Is food buckling the cooling air outlet 5 food in high temperature section Food in the refrigerator 4 Check if the PWB is set to Front Part ar is frozen 6 _ Set the button to MID 7 15 watery food kept 10 Seal watery food with vinyl wrap Moisture or ice forms in 8 Check if putting in hot food 11 Put food after it cools the chamber ofthe set 9 Did you open the refrigerator door too 12 Don t open the door too often
8. Figure 19 Refrigerator Control Box Remove the lamp cover as mentioned before 1 Loosen the screws 2 Remove the entire control box See Figure 20 3 Disconnect the control box connector See Figure 21 Figure 20 Figure 21 4 Reversible Door PRECAUTION 1 Before reversing the doors remove all foods and accesories like shelves or trays which are not attached to the doors 2 Use a Philips screwdriver bolt driver torque wrench or spanner to tighten and loosen the bolt 3 Be careful not to drop the refrigerator or door when assembling or disassembling lower hinge or the Adjustable Screw Assembly 4 Don t lay the refrigerator down to work on it It will cause malfunction 5 The doors may be reversed to provide left or right opening depending upon the customer s preference HOW TO REPLACE THE DOOR OPENING LEFT TO RIGHT when converting from left opening to right opening Remove the cap Uand upper hinge v 2 Remove the Freezer Door W Remove the center hinge xand the 4 Remove the lower hinge z Refrigerator Door Y 12 5 Reverse the position of the adjustable Assemble the lower hinge Z screw assembly 6 Move the bracket to the opposite Move the cap to the opposite side and side of the refrigerator door 8 assemble the center hinge ur JA 9 Assemble the door stopper for the Move the cap to the opposite side of correct side 1 0 the freezer d
9. This characteristic is used for starting the motor 2 2 PTC Function 1 The PTC is attached to the hermetic compressor and its used for its starting This household refrigerator uses a single induction motor During normal operation the motor starts with current flowing through both the main and the auxiliary windings After the motor starts current to the auxiliary winding is cut off 2 3 PTC Electric Diagram According to motor starting method OVERLOAD PROTECTOR COMPRESSOR MOTOR CS PTC STARTER HERMETIC TERMINAL RSIR Figure 20 2 4 Motor restarting and PTC cooling 1 To restart normal operation after a power interruption wait 5 minutes to let the pressure equalize and the PTC to cool 2 During normal operation the PTC generates heat If it has not had time to cool after a power interruption the motor will not restart until the PTC cools 2 5 PTC OLP Relation 3 If power is cut off during compressor operation and then restored before the PTC has cooled down it s resistance value increases As a result the current cannot flow to the auxiliary winding and the motor cannot start and the OLP operates due to the current overflow through the main winding 3 While the OLP repeats the ON OFF operation 3 5 times the PTC cools and the compressor operates normally If the OLP does not operate when the PTC is hot the compressor motor will overheat causing a short circuit
10. Fan Motor 1 Remove freezer shelf 3 Remove the bin assembly by pulling it to the right side until it snaps out 4 Remove Grill Fan screw cover See Figure 14 5 Loosen the screw See Figure 15 6 Pull out the fan cover Figure 16 Figure 15 Figure 14 6 Unplug the connector 7 Remove the fan holder shroud Figure 17 8 Remove fan and loosen both screws that hold the bracket 9 Remove the motor bracket and the rubber parts Pull out the fan motor See Figure 17 Figure 16 Figure 17 10 Defrost Control Assembly 1 The defrost control assembly consists of one thermistor and a fuse that melts with heat 2 The termistor s function is to sense the compartment s temperature and automatically stop the defrost The termistor is located beside of the evaporator bracket 3 The melting fuse is a safety device to prevent an overheating of the defrosting resistance when it operates 4 The fuse melts at 162 F and the resistance heater stops 5 To replace this components please follow the steps mentioned at Figure 18 1 Figure 18 Unplug the connector plugged to the defrost control assembly and replace it if necessary Lamp Refrigerator Compartment Lamp 1 Remove the lamp cover with a screwdriver or a similar tool See Figure 19 2 Remove the lamp by unscrewing it counterclockwise and replace it with the same specifications 125V 20W Part Number 6912JB2002J
11. or possibly a fire Therefore use a fail safe OLP 2 6 Note on using the starting PTC 1 Be careful not to cause an overvoltage or short circuit 2 Do not force or bump it 3 Keep the OLP dry If water or oil gets into the OLP the electrical insulation can degrade and fail 4 Do not replace the PTC at your own convenience Do not disassemble the PTC If the PTC s exterior is damaged the resistance value changes and may cause failure during the stating of the compressor s motor Use a PTC in good condition 3 OLP 3 1 OLP Definition 5 The OLP is a bimetallic heat sensitive switch attached to the compressor Its function is to protect the motor in the event of overheating 6 When an overvoltage flows to the motor the bimetal reacts by heating and activating opening the OLP 3 2 OLP Function 7 Prevents the starting to the motor winding 8 Do not turn the adjustment screw during normal OLP operation OLP connection diagram CONTACTING OIN COVER BIMETAL CONTACTING POINT TERMINALS BIMETAL ADJUST SCREW 03 3 e Figure 21 HEATER 6 Troubleshooting 6 1 COMPRESSOR AND ELECTRIC COMPONENTS Go to Step 2 gt Remove the PTC Starter Rating Voltage from the Compressor 10 and measure the voltage between Terminal C of Compressor and Terminals 5 or 6 of PTC No Voltage OLP disconnected Replace OLP Go to Step
12. 3 P 6 8 Rest within 0 296 Brazing Temperature 735 840 C Ingredients and Preparation Borax 60 2 FLUX Fluoridation Kalium 3596 Water 5 Assemble the drier within 30 minutes after unpacking 4 m 3 DRIER ASSEMBLY Keep the unpacked drier at the temperature of 2 gt 10 the drier outdoors because humidity it 80 100 C When measuring with pirant Vacuum gauge of charging vacuum degree is within 1 Torr A P 2 If the vacuum degree of the cycle inside is 10 Torr 3 Apply MIC Vacuum Gauge mE fil 4 Perform vacuum operation until a proper vacuum Below for low pressure and 20 Torr For high pressure A degree built 4 VACUUM indicates no vacuum leakage state A 5 If a proper vacuum degree is not built up check the 3 Vacuum degree of vacuum pump must be 0 05 Torr 6 leakage from the Cycle Pipe line parts and Quick Coupler Connecting part 4 Vacuum degree must be the same of the value 9 described item 2 above for more than 20 min The pressure of dry air must be more than 12 6Kg cm 5 DRY AIR AND NITROGEN Temperature must be more than 20 70 C GAS Keep the pressure to 12 6Kg cm also when substituting dry air for Nitrogen gas 1 Check if gas leaks with soapy water i 6 NIPPLE AND COUPLER 2 Replace Quick Coupler in case of leakage 6 Check if gas leaks from connecting part of coupler 7 T Put all joint pipe in a clean box and cover tight
13. 4620JJ2004A 4620JJ2001A 210 STOPPER GUIDE 4974JA3031A J325 00033A 2126 NAME PLATE P H 4140JD1020P 4140JD1020B 230A REFRIGERATOR DOORASSEMBLY 3581JJ8010A 3581JJ8002D 231A REFRIGERATOR DOOR FOAM ASSEMBLY 5433JJ0012B 5433JJ0005B REFRIGERATOR DOOR GASKET 4987JJ1001C 4987JJ1001B 233A ASSEMBLY 241A DOOR BASKET 5004JJ1004B 5004JJ1004B 241 DOOR BASKET 5004JJ1002B 5004JJ1002B 241C DOOR BASKET 5004JJ1003B 5004JJ1003B 2410 DOOR BASKET 5004JJ1005B 5004JJ1005B 281A HINGE COVER 3550JJ2011A 3550JJ2004B 42 11Ft Loc Descripci n GR 382R LRTP1231W 281B UPPER HINGE ASSEMBLY 4775JA3015C 4775JA2001D 282B CENTER HINGE ASSEMBLY 4775JA3009B 4775JA3009A 283B LOWER HINGE ASSEMBLY 4775JA2020A 4775JA2023B 301A EVAPORATOR ASSY 5421JA2359B 5421JA2359A 303A SPACER INSULATION 4826JJ2001A 4826JJ2001A 303B SPACER ASSY 4827JJ3001A 4827JJ3001A 304A MECHANICAL AREA COVER 3551JJ2002A 3551JJ2002A 307A COMPRESSOR ASSEMBLY 2521JA1006A 2521C B5602 308A ASSEMBLY 6748JA3001A 6748C 0004D 309A 6750JA3001A 6750C 0005D 310A COVER 3550JA2158A 3550JA2087B 312A BUSHING 5040JA3044A 5040JA3021A 314A COMPRESSOR BUSHING 4J03277A 4J03277A 315A COMP BASE ASSY STD 3103JJ2001C 3103JJ2001A 3158 3J02312A 3J02312A 315 4J04238A 4J04238A 317A DRIERASSY 5851JJ2002A 5851JJ2002A 318A HOLDER 4930J
14. 5 Check connection condition Applied voltage isnh Consult a qualified the range of Rating electrician Go to Step 5 Voltage 1096 Check the Check the resistance Go to Step 3 resistance of among M C S C and M S Motor in Motor Compressor Compressor a Go to Step 3 ompressor Go to Step 4 Go to Step 5 Check the Check the resistance of Go to Step 4 resistance of two terminals in PTC PTC Starter Starter Replacce PTC Starter Go to Step 5 Check OLP Check if applying a 2 forcible gt regular OLP OLP operation by turning against power on and off Replace OLP Check Measure minimum starting Components start in YES starting state voltage after 5 min for the voltage of Rating balancing cycle pressure Voltage 10 below and cooling the PTC Go to Step 1 NO 16 6 2 AND OLP Normal operation of Separates the PT Observation value is Compressor is from Compressor and 220V 50Hz 22 30 Check the other impossible or poor measure the 115V 60Hz 6 8 30 electric components resistance between 240V 50Hz 33 30 No 5 and 6 only RSIR Type 4 127 220V 60Hz 22 30 and 5 of PTC with a Tes ter or Wheatstone Bridge Figure 22 The Resistance value is O or several Replace PTC hundreds The value is Check other electric Separate the OLP components from Compressor and check resistance
15. J3002A 4930JJ3002A 319A TRAY 3390JJ0001A 3390JJ0001A 319C FAN GUIDE 4974JJ1002A 4974JJ1002A 323B CONDENSER ASSY WIRE 5403JA1039A 5403JA1039A 327A BUSHING 5040JJ3003A 5040JJ3003A 328A BUSHING 5040JJ3002A 5040JJ3002A 329A ASSEMBLY 5901JJ1001A 5901JJ1001A 329C ASSEMBLY 5901JJ1001B 5901JJ1001B 330B FREEZER SHROUD ASSEMBLY 4999JJ1001A 4999JJ1001A 332A GRILLE ASSEMBLY 3531JJ1001A 3531JJ1001A 401A DEFROST CONTROL ASSEMBLY 6615JB2005C 6615JB2005A 404A MOTOR MECHANICAL AREA 4680JB1033B 4680JB1033D 405A MOTOR BRACKET 4810JA3007A 4810JA3007A 405 MOTOR BUSHING J756 00008B J756 00008B 406B DOOR SWITCH 6600JB1002K 6600JB1002K 407A HEATER PLATE 5300JB1080F 5300JB1080F 410H CAPACITOR M R 0CZZJB2003G J513 00003C 411A CONNECTOR ASSEMBLY 6877JK3001A 6877JK1002A 418A HEATER CORD 5300JB1079F 5300JB1079C 420A MOTOR MECH COOLING 4680JB1017Q 4680JB1017C MAIN PWB ASSEMBLY 6871JB1115A 6871JB1115B 501F PWB ASSEMBLY 3550JJ2001B 3550JJ2001A 604F DEODORIZER COVER 3550JJ2002A 3550JJ2002A 155 NAME PLATE P H 4140JJ2001A 4140JJ2001A 409B LIGHT BULB 6912JB2002J 6912JB2002J 604G DEODORIZER NO DEODORIZER 5986JA3007B 43 LG Electronics Inc P No 3828J8331B
16. ance Temperature variation during defrosting time depending upon the cooling system 7 Refrigerato Indirect System Freezer 22 7 2 7 3 Product Disassemble Doors e Freezer Door 1 Remove hinge cover by pulling it upwards 2 Loosen the hexagonal bolts that hold the upper hinge in place See Figure 1 3 Remove door See Figure 2 i Figure 1 Figure 2 4 Pull gasket to remove it See Figures 3 and 4 Figure 3 Figure 4 e Refrigerator Door Loosen the hexagonal bolts that hold the central hinge in place See Figure 5 Remove refrigerator door See Figure 6 3 Pull out the gasket to remove it from the door See Figure 4 from Freezer door N Figure 5 Figure 6 Door Switch 1 Pull out the door switch out using a flat head screwdriver See Figure 7 2 Disconnect all switche s cables See Figure 8 m Figure 7 Figure 8 Control Circuit Display PWB 1 Remove the lamp cover by inserting a screwdriver in the lower side s holes See Figure 9 2 Loosen and remove the 2 screws See Figure 10 Figure 9 Figure 10 3 Pull out the Control Box See Figure 11 4 Disconnect the connector from the cable terminal See Figure 12 5 Remove the EPS Multi air duct insulation from the control box 6 Detach the electronic control Display PWB See Figure 13 di Figure 11 Figure 12 Figure 13 Fan and
17. and close it often firmly 13 Check if ambient temperature and 15 Wipe moisture with a dry cloth Moisture forms on the humidity are high 16 This does not occur ifthe temperature outside 14 Is there a gap in the door gasket and humidity are in the normal range 17 Fixthe gap 18 Is the refrigerator positioned in a firm 22 Adjust the leveling screws Position the and even place refrigerator properly 19 Is something in the way behind the 23 Remove the objects Abnormal Noise refrigerator 24 Replace the tray 20 Check if the evaporating tray cover is 25 Replace the cover left off 21 Check if the cover of mechanical room in below and front sides 15 taken out 26 Check if the door gasket area has 29 Clean the door gasket become dirty or contaminated 30 Position the refrigerator in a firm place Door doesn t close well 27 Is the refrigerator placed in a firm and and adjust the leveling screws even place 31 Keep food from reaching to the door 28 Is too much food put in the refrigerator 32 Check if the inside of the refrigerator 35 Clean the inside of the refrigerator becomes dirty 36 Wrap fragrant food Ice and food smell 33 Did you keep fragrant foods without 37 The new refrigerator smells of plastic but unpleasent wrapping 34 It smells plastic the odor will dissipate after a couple of weeks n addition to the items described above refer to the following to solve the complaint Check i
18. and damage to the part which may result from the simultaneous start of various components on turning the power on or after the completion of a test Condition of Operation Operating Sequence If the temp of the defrosting sensor is 25 C or above For the initial use after the purchase or grounding POWER in0 5sec COMP amp COOLING FAN ON ON If the temp of the defrosting sensor is below 25 After a power failure or SVC uo p uin1 4 ay ueuM POWER in0 5sec _ DEFROSTING int0sec DEFROSTING ON gt HEATER ON HEATER OFF in 0 5 sec COMP amp COOLING FAN 23 7 1 4 ERROR DIAGNOSTIC MODE 1 The error diagnostic mode indicates when a fault may affect the performance of the product occurs while operating the product will not be performed refrigerator returns to the normal condition Reset the display of the refrigerator while the remaining LEDs are off Error R2 R3 R4 OFF Even if a function control button is pushed when an error occurs the function When the error is cleared while the error code is displayed due to a fault the The error code is displayed by the refrigerator temperature indication LED on O NORMAL Faulty refrigerator R sensor on the control box of the refrigerator Faulty defrosting sensor Cut or short circuited wire of refrigerator sensor Cut or short circuited wire of defrosting sensor 15 min ON
19. d View 40 41 Service Parts list 42 43 Safety Precautions Read the following inst ructions before servicing your refrigerator 1 Unplug the refrigerator before 6 If you check the bottom part of the servicing refrigerator while the freezer 2 Visually inspect for gas leakage or door is open be careful standing short circuit up You could bump your head 3 If testing with the refrigerator 7 When you tilt your refrigerator be plugged in wear rubber gloves to sure to take out all metal glass or avoid electric shock other loose parts 4 Do not touch frozen metal parts your hands could freeze to the 8 When servicing the evaporator wear cotton gloves to prevent cutting surface This may cause frostbite by any of the evaporator fins 5 Be sure that no water is dripping towards electrical or metal parts Service Precautions Refrigerant Recharging Test the compressor s operation before recharging the refrigerant this is very important to detect failures and to ensure the proper motor running and to identify failures immediately If failure has been detected clean the system from any other possible R 134a residues by breaking the final part of the compressor s service pipe at it s thinnest part as shown in Fig 1 Replace the filter and any other
20. e MICOM is restored after a momentary power failure For the initial 10 ms of power supply LOW voltage 1 applied to the MICOM RESET terminal During a normal operation 5 V is applied to the RESET terminal If trouble occurs in the RESET 1 the MICOM will not work 26 7 2 4 LOAD DRIVE CIRCUIT 1 Load Drive Condition Check MELTING DEFROST FUSE HEATER Load Type Compressor Freeze Fan Defrosting Heater Motor Measurement Location ON 1 V or below Condition OFF 12V 27 7 2 5 TEMPERATURE SENSOR CIRCUIT AND MICOM Pel AINT CON2 gt REFRIGERATOR SENSOR DEFROST SENSOR The upper CIRCUIT reads REFRIGERATOR temperature and DEFROST SENSOR temperature for defrosting into MICOM OPENING or SHORT state of each TEMPERATURE SENSOR are as follows Defrosting Sensor POINT B Voltage SHORT SENSOR CHECK POINT NORMAL 30 50 CIRCUITED OPEN Refrigerator Sensor POINT Voltage 0 5 45V 0v 5V 28 7 2 6 TEMPERATURE COMPENSATION amp OVERCOOLING UNDERCOOLING COMPENSATION CIRCUIT 1 Refrigerator Temperature Compensation ICi MICOM 112 o Refrigerator Resistance heul talento Remark RCR1 ompensation F C 180 K 41 5 0 Compensation by raising 56 K 39 2 40 the tempera
21. f frost forms in the Freezer Check Refrigerating Cycle Defrosting is poor The cycle is faulty 19 Replace the componets of the defrosting circuit Repair the cycle 6 5 REFRIGERATING CYCLE Troubleshooting Chart TEMPERATURE REFRIGERAT EVAPORATOR CAUSE CONDITION CONDITION alil cea COMPRESSOR Freezer and Low flowing sound of A little higher than A little refrigerator PARTIAL Refrigerator don t refrigerator is heard ambient temperature has leaked LEAKAGE get cold normally and frost forms in inlet Refrigerator runs m only normally if you recharge it gt Freezer and Flowing sound of Equal to ambient No discharging of O WHOLE Refrigerator don t refrigerant is not heard temperature refrigerant m get cold at all and frost isn t formed Refrigerator runs LEAKAGE normally if yoy recharge it Freezer and Flowing sound of A little higher than Normal discharainf O Refrigerator don t refrigerant is heard and ambient temperature 9 PARTIAL E of refrigerant CLOG get cold normally frost forms in inlet only The capillary tube CO is faulty A m Freezer and Flowing sound of Equal to ambient WHOLE Refrigerator don t refrigerant is not heard temperature Normal discharging lt CLOG get cold at all and frost isn t formed of refrigerant Cooling operation Flowing sound of Lower than ambient Cooling operation stops periodically refrigerant
22. igure 4 TO THE R 134a CYLINDER TO THE REFRIGERATION STEM H SY Figure 4 Before performing this operation if the vacuum pump and charging cylinder are still attached to the system be sure the valve between the pump and the cylinder is closed to Service Precautions keep refrigerant out of the system See Figure 5 For gas charging check the graduated scale on the cylinder to see the amount of refrigerant that it contains and the amount that will be pumped into the system For example if you have 750 grams of refrigerant in the cylinder and we have to pump 165 grams to the system this amount will be reached when the indicator reaches 585 grams remember that the indicator shows a lower level of meniscus Do this after choosing the scale corresponding to the gas pressure indicated on the pressure indicator located on the upper part of the column To let R 134a flow into the system open the valve at the recharging cylinder s base The total amount of refrigerant should not be FILLING OR CHARGE TUBE TO THE REFRIGERATION SYSTEM TO THE VACUUM PUMP installed in one session as it could block the compressor Install 20 30 grams at a time and close the valve The compressor will run and the pressure will drop Then open the valve and install other 20 30 grams of refrigerant Repeat this procedure until the entire amount has been added to the system Under operating conditions the syste
23. is postponing is necessary because of perceiving speed 31 JojejeBujeJ lewiou YOSN3S eoeldey SI 303151593 eouejsisei T dan YOSN3S YOSN3S 49949 A 1004 JOJeIOdeAS UO 1504 ewou ONILSOY430 ees yo junowe y ONILSOYI30 SI si JUN IVSIANZL HNOS Y3Z3383 YOLOANNOOD NIVIN 0 91 DEI IM SNLLO3NNOO JO uonoeuuoo pue YOLOW peuo 18 90 HOLOM 123 YANN 59007 UNIT SI HOLON HOLON ONITO09 aoejday edid jueJeBujoeJ Jo eunje1yeduue iS asejns eu pue jue1eBujeJ s oq Z pue yea ay JojeJode 3 uo 150110 JUNOWE au eJnseelu ON LNOO SI YOLOANNOO 3MIM 9NILO3NNOO amd NIV AV 139 Jo xoelg eu NOSS3HdWoo ejesado LAM Josseidwoo 904 8Md NIVN soeldoy 51014 10 dO Id 10 1035944109 eoe des 001 YOSSANdNIOD JeuuojJsuei a9ejday uedo uoneJedo HOLO3NNOO esnjjeuuojsuel HOLO3NNOO SI uonoeuuoo ne NIV 45 J9WJOJSUBA Jojoeuuoo 4994109 Jo uonoeuuoo eu Jjounos YIMOd Bunsooq asf eDeyon ayy sj NA maus ou AOA WIP SI
24. is not heard temperature l MOISTURE en restarts when CLOG heating the inlet of capillary tube COMPRESSION Freezer and Low flowing sound of A little higher than refrigerator don t get refrigerant is heard and ambient temperature ER Ee cr on cold frost forms in inlet only i zm No compressing Flowing sound of Equal to ambient 3 A operation refrigerant is not heard temperature m 9 and frost No pressure of 0 lt COMPRESSION high pressure side om in compressor 2 Leakage Detection Check for a leak which may be in the oil discharge in the compressor or in the evaporator Check if frost forms on the evaporator Normal amount Faulty Compressor Check if Compressor runs Normal formed frost Moisture clog Check Compressor 20 No frost or forms in inlet only Observe the discharging amount of refrigerant Large or small amount Recharge refrigerant to compressor and check cooling operation Clogged by dust Slight frost forms Evaporator Check for oil leaks Refrigerant leakage Locate and repair the leak YES General Control of Refrigerating Cycle 1 H O Chemical Ingredients Ag 30 Cu 27 Zn 23 Cd 20 Brazing Temperature 710 840 C 1 WELDING ROD 2 BCuP 1 Recommended H34 containing 34 in the n Service Center Chemical Ingredients Cu About 9
25. ly with the lid so dust or humidity do not contaminate 21 7 Function amp Circuit 7 1 7 1 1 FUNCTION 1 When the appliance is plugged in it is set to Medium Each time the button is pushed it cycles through Medium Medium High gt High Low gt Medium Low gt Medium 2 When the power is initially applied or restored after a power failure it is automatically set to Medium Temperature Medium Medium Control kam Low High High TEMP F C 464 8 392 4 37 4 3 347 1 5 30 2 1 ROOM REFRIGERATOR 22 7 1 2 DEFROSTING 1 2 defrosting is performed each time when the total running time of the compressor reaches 10 hours After the power 1 turned on or restored after a power failure the defrosting starts when the total running time of the compressor reaches 4 hours When the temperature of the defrosting sensor reaches 13 C or above the defrosting stops If the temperature does not reach 13 C in 2 hours after the defrosting starts the defrosting error code is displayed Refer to 7 1 4 Error Diagnostic Mode With the defective defrosting sensor cut or short circuited wire the defrosting will not be performed 7 1 3 SEQUENTIAL OPERATION OF ELECTRIC COMPONENTS The electric components such as the compressor defrosting heater and cooling fan starts sequentially to avoid noise
26. m pressure should stabilize between 0 3 and 0 6 atm VALVE TO BE OPENED WHEN REFILLING TO THE CHARGE CYLINDER VALVE TO BE CLOSED AFTER VACUUM Figure 5 Feature Chart FREEZER Temperature Control ini N Ta Sume Ice Trays A O U Twist n Serve REFRIGERATOR Temperature Contro Fresh Meat Shelves Plastic or Glass Deodorizer Absorbs Odors Multi Air Flow Air flow distributor Vegetable Tray Keeps fruits and vegetables fresh Magic Crisper Vegetable Tray cover that control humidity MODEL S GR 382R LRTP1231W This part is only included in model LRTP1231W Freezer Door Baskets Refrigerator gt Door Baskets Leveling Screws Graphic Circuit Diagram Brown Red a Orange Orange Brown Red Orange Orange 7 Violet Umm A i I Switeh 22 Brown en MEUS CI CE A uama hah aun i Defrost and Temperathire Electronic Control Control Mi Sensor i Yellow JE i H Pink N Running Capacitor E NEN a Black Black AC Current Cooling Systems Direct System Indirect System Cold Air gt Warm Air Important Check that the air ducts are not obstructed for a better cooling perform
27. oor 1 1 Reverse the pin position of the upper Assemble the upper hinge and replace hinge 12 the cap 13 1 COMPRESSOR 1 1 Function The compressor sucks low pressure evaporated gas from the evaporator and compresses it into high temperature high pressure gas and sends it to the condensor 1 2 Composition The compressor includes the compressing system a motor and an enclosure The PTC thermistor and OLP Overload Protection Device are attached to its exterior Handle and repair the compressor with care 11 includes parts manufactured to 1 micron tolerance and is hermetically sealed to exclude dust or humidity after fabrication Dust humidity or flux getting into the refrigeration cycle could clog it or otherwise affect the cooling 1 3 Use notes 1 Protect your refrigerator from over currents or overloads 2 Do not bump or jar the compressor it is bumped or forced dropping or careless handling it could damage the compressor or cause noise or undesirable operation 3 Use only exact replacement parts when repairing the compressor If the terminals become corroded it could affect operation If the replacement parts are of incorrect values operation and safety will be compromised 9 Adjustments 2 PTC 2 1 PTC Composition 1 The PTC Thermistor is a semiconductive starting component that is made with BaTiO 2 The higher the temperature the higher the resistance value will be
28. part that could be deteriorated Unweld and pull out the service pipe then place a new pipe extension with a Hansen male connector and solder the new pipe See Fig 2 POINT TO BE CHARGE TUBE PRONEN EXTENSION FEMALE HANSEN 1 1 MALE HANSEN SERVICE TUBE EXTENSION SOLDERING POINT Figure 1 Figure 2 It is necessary to open the valve when soldering to allow the gases to escape without forcing the molten solder out of the joint The extension with the male Hansen connector should be connected to a female type connector to the vacuum pump s pipe See Fig 3 System air evacuation starts as soon as the pump begins to run The system must be kept under vacuum until the low pressure gauge shows O absolute or 1 atm 760 mm Hg It is not recommend to run the vacuum pump for more than 30 minutes See THE VACUUM PUMP PRESSURE GAUGE Figure 3 Figure 3 In case there 1 a large leak and the vacuum operation must stop you must add a small amount of refrigerant to the system and check with an electronic leak detector If a soldering failure is detected open the valve before soldering to equalize the pressure and keep solder from being blown out of the joint or sucked into the piping As soon as the repair is completed charge the correct amount of refrigerant into the system Remember that each system requires a specific amount of refrigerant with a tolerance of 5 grams See F
29. ture 33 K 37 4 3 0 18 K 35 6 2 0 12K 35 24 1 8 10K 32 0 Standard Temperature 8 2 K 30 2 1 0 Compensation by 5 6 K 28 4 2 0 lowering the temperature 3 3 K 26 6 3 0 2K 24 8 4 0 470 K 23 5 0 Table of Temperature Compensation by adjusting the resistance Difference with the current temperature Example If the refrigerator compensation resistance RCR1 is changed from 10 the current resistance to 18 K the adjustment resistance of the refrigerator rises 33 8 F 1 C 29 7 2 7 KEY BUTTON INPUT amp DISPLAY LIGHT ON CIRCUIT 104 PWH A P50 TC3 INT3 azo l e P42 R10 d 102 lj 9 The circuit shown above is to determine whether a function control key on the operation display is pushed and to turn on the corresponding function indication LED The drive type is the scan type 30 7 3 RESISTANCE SPECIFICATION SENSOR TEMPERATURE SENSOR RESISTANCE OF REFRIGERATOR F DEFROST SENSOR 4 20 77K 5 15 66 k 14 10 47 3 23 5 38 4 32 0 30 41 5 24 1 50 10 19 5 59 15 15 9 68 20 13 77 25 11 86 30 8 9 104 40 6 2 122 50 4 3 1 resistance of SENSOR HAS 5 common difference 2 Measure the resistance of SENSOR after leaving it over minutes in measuring temperature Th
30. value between two terminals of OLP with a Tester Figure 23 Replace OLP Figure 22 Figure 23 17 6 3 OTHER ELECTRIC COMPONENTS No Cooling Compressor Check if current flows to Cause doesn t run the following components a Starting Devices Shorted or Broken b OLP Poor contact or shorted c Compressor coil Coil Shorted Replace each d Circuit Parts contact or shorted component Check starting Low Voltage Raise the voltage voltage Check if current Poor contacting Replace the flows to starting and broken defective devices component Running state of Compressor is poor Check current Shorted flowing in sub coil Lack of Capacity of Compressor The items Compressor Replace the Check capacity of OLP described above Motor Coil Compressor are normal Fan Motor doesn t Checker current run flow of the door Check current Coil is shorted flowing in the fan motor Much frost is on the Check current flow Shorted gt Replace PTC evaporator of the following components Defrost Control Assembly Replace the defective component Check current flow of the following components L CORD TE PLATE HEATER Replace PTC 18 6 4 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY 1 15 the power cord unplugged Plug it to the outlet 2
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