LG LRTN19310 Series Service Manual Download | Manualshive

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CAUTION

BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

REFRIGERATOR

SERVICE MANUAL

models

LRTN19310

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LRTN22310

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Summary of Contents for LRTN19310 Series

Page 1: ...CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL REFRIGERATOR SERVICE MANUAL models LRTN19310 LRTN22310 ...

Page 2: ...faults 2 To prevent electric shock unplug before servicing 3 Always check line voltage and amperage 4 Use standard electrical components or cause your skin to freeze and stick to the surfaces inside the freezer 5 Don t touch metal products in the freezer with wet hands This may cause frostbite 6 Prevent water from spiling onto electric elements or the machine parts 7 Close the top door before open...

Page 3: ...ing TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic Heater Defrost DOOR FINISH VCM HANDLE TYPE Bar INNER CASE ABS Resin INSULATION Polyurethane Foam ITEMS SPECIFICATIONS VEGETABLE TRAY Opaque Drawer Type COMPRESSOR PTC Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R 134a 155 g LUBRICATING OIL Freol 10G 310 cc DEFROSTING DEVICE SHEATH HEATER LAMP REF...

Page 4: ...MENT REFRIGERATOR COMPARTMENT Ice Bin Freezer Shelf Digital Sensor Control Snack Corner Shelves Crisper Keeps fruits and vegetables fresh and crisp Freezer Door Bin Door Bin Egg Tray Refrigerator Door Rack Base Grille Can Dispenser Dairy Bin ...

Page 5: ... Door 1 Loosen hexagonal bolts attaching the lower hinge to the body to remove the refrigerator door only 2 Pull out the door gasket to remove from the door foam assembly 3 2 DOOR SWITCH 1 To remove the door switch pry it out with a slotted type driver as shown in Figure 4 2 Disconnect the lead wire from the switch 3 DISASSEMBLY 5 BOLT HINGE HINGE COVER Figure 1 GASKET Figure 2 LOWER HINGE BOLT Fi...

Page 6: ...e 6 2 Separate the connector with the Defrost Control assembly and replace the Defrost Control assembly after cutting the Tie Wrap Figure 7 3 5 LAMP 3 5 1 Refrigerator Compartment 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 reve...

Page 7: ...ing device for the Motor 4 2 2 Role of PTC Starter 1 The PTC is attached to the Sealed Compressor and is used for starting the Motor 2 The compressor is a single phase induction motor Durign the starting operation the PTC allows current flow to both the start winding and main winding 4 2 3 PTC Applied Circuit Diagram Starting Method for the Motor 4 2 4 Motor Restarting and PTC Cooling 1 It require...

Page 8: ... Cover Back M C 2 Remove the screw on Cover PTC 3 Remove two Housings on upper part of Cover PTC 4 Take out the cover PTC from upper to lower position like 5 Turn 45 in the direction of and take it out 6 Assembly in reverse order of disassembly 8 Part Customer part number Lot code date code 330 FBYY S1 BOX98 12345678 Physical termination part number Electrical characteristics part number No Name B...

Page 9: ...GOOD MODEL 5 CIRCUIT DIAGRAM 9 ...

Page 10: ...mpressor Supply voltage rating with 10 Applied voltage isn t in range of Rating Voltage 10 Remove PTC Starter from Compressor and measure voltage between Terminal C of Compressor and Terminals 5 or 6 of PTC Check resistance between M C S C and M S in Motor Compressor Check resistance of two terminals in PTC Starter Check resistance of two terminals in OLP Check the power supply under load Compress...

Page 11: ...tween No 5 and 6 of PTC Starter with a Tester Figure 12 Separate OLP from Compressor and check resistance value between two terminals of OLP with a Tester Figure 13 Observation value is 115V 60Hz 6 8Ω 30 The resistance value is 0Ω short or open Check another electric component Replace OLP Check another electric component Replace PTC Starter Figure 12 Figure 13 ...

Page 12: ...or broken or open contact Shorted Lack of capacity Replace indicated component Raise voltage Replace indicated component Cause Check voltage at starting devices Check current at Compressor Check rating of OLP Fan motor doesn t run Heavy frost buildup on EVAPORATOR Wire is open or shorted Coil is shorted or open Open Open Replace Defrost Heater Replace indicated component Replace indicated componen...

Page 13: ...nding air are high Is there a gap in the door gasket Is the unit positioned in a firm and even place Are any unnecessary objects placed in the back side of the unit Check if the Drip Tray is not firmly fixed Check if the cover of the compressor enclosure in the lower front side is taken out Check if the door gasket is dirty with an item like juice Is the refrigerator level Is there too much food i...

Page 14: ...refrigerant A little higher Normal discharging of the RESTRICTION compartment and is heard and frost forms than ambient refrigerant Refrigerator don t in inlet only temperature The capillary tube is faulty cool normally WHOLE Freezer Flowing sound of refrigerant Equal to ambient Normal discharging of the RESTRICTION compartment and is not heard and frost isn t temperature Refrigerant Refrigerator ...

Page 15: ...g Do not mix with R 12 refrigerant To remove the moisture from pipe inside Defect in refrigerant leak area The opening time should be reduced to a half of the standards during rain and rainy seasons the penetration of water into the pipe is dangerous Refer to repair note in each part R 134a refrigerant is more susceptible to leaks than R 12 and requires more care during welding Do not apply force ...

Page 16: ...0 C 7 1 3 Electrical Parts Operates in Orders Electrical parts such as COMP defrost heater freezer FAN etc operate in the following order to prevent noise and parts damage Several parts are started at the same time at initial power on and are turned off together when TEST is completed 7 DESCRIPTION OF FUNCTION CIRCUIT OF MICOM 16 WARMER COLDER 1 2 3 4 5 TEMPERATURE ADJUST OPERATING ORDERS Temperat...

Page 17: ... turns off ERROR CODE on Refrigerator Temperature panel NO ITEM DEFECT SIGNS CONTENTS REMARKS R1 R2 R3 R4 R5 1 2 3 4 Refrigerator sensor malfunctions Defrost sensor malfunctions Room Temperature sensor malfunctions Defrosting malfunctions Open or short circuited wire Open or short circuited wire Open or short circuited wire 2 hours after defrosting starts the sensor is not above 50 F 10 C Inspect ...

Page 18: ... while in the test mode the test mode is cleared and the error code is displayed 6 While an error code is displayed the test mode will not be activated even if the test button is pushed 18 MODE MANIPULATION CONTENTS REMARKS TEST1 TEST2 Reset Push the test button once Push the test button once while in TEST MODE 1 Push the test button once while in TEST MODE 2 1 Continuous operation of the COMP 2 C...

Page 19: ...7 2 PCB FUNCTION 7 2 1 Power Circuit 1 Power is supplied to the control board at pins 1 and 5 of connector 4 19 ...

Page 20: ...hen the door of the freezer refrigerator is left open for 7 minutes or longer the lamp of the freezer refrigerator turns off automatically 20 Circuit Pin Number Pin Number Output Voltage Compressor Con1 pin1 Con4 pin1 115 VAC Condenser fan Con1 pin1 Con4 pin1 115 VAC Evaporator fan Con1 pin1 Con4 pin1 115 VAC Defrost heater Con1 pin3 Con4 pin1 115 VAC F R lamp Con1 pin5 Con4 pin1 115 VAC ...

Page 21: ...2 Open Door Circuit Door Monitor Circuit 21 Freezer or Refrigerator Measurement between pins 5 and 6 at Con 3 Both Closed 0 volts One door open 5 volts ...

Page 22: ...ch sensor wil range between 0 5 volts 22 F 30 C and 4 5 volts 122 F 50 C depending upon the temperature in the compartments A measurement of 0 volts indicates a short in the sensor circuit A measurement of 5 volts indicates an open in the sensor circuit 22 ...

Page 23: ...NSOR SUPER FROST SENSOR R1 R2 SENSOR after disconnect CON5 of PWB ASSY MAIN TEMPERATURE RESISTANCE OF FREEZER RESISTANCE OF REFRIGERATOR SENSOR DEFROST SENSOR 20 C 4 F 22 3 KΩ 77 KΩ 15 C 5 F 16 9 KΩ 60 KΩ 10 C 14 F 13 0 KΩ 47 3 KΩ 5 C 23 F 10 1 KΩ 38 4 KΩ 0 C 32 F 7 8 KΩ 30 KΩ 5 C 41 F 6 2 KΩ 24 1 KΩ 10 C 50 F 4 9 KΩ 19 5 KΩ 15 C 59 F 3 9 KΩ 15 9 KΩ 20 C 68 F 3 1 KΩ 13 KΩ 25 C 77 F 2 5 KΩ 11 KΩ 30...

Page 24: ...not operating properly 6 Door not sealing 7 Evaporator Frosted up 8 Sealed System related problem 1 Open in defrost circuit 2 Defrost sensor not operating correctly 3 Defrost drain clogged 1 Check supply voltage to refrigerator 2 Check wiring and connectors to PWB board 3 Check door monitor circuit 1 Check supply voltage to refrigerator 2 Check wiring and connectors to and from PWB board 1 Check f...

Page 25: ...7 5 MAIN PWB ASSEMBLY AND PARTS LIST 7 5 1 Main PWB Assembly 25 ...

Page 26: ...1A 304A 501A 411A 410G 501F S01 309A 318A 308A S07 314A 307A 312A 317A S06 S09 310A 327A 103A 105A 301A 283E 103B 328A 145B 145A 282H B02 S13 282B 406B 418A 281A B01 281B 103C 305B 305B 305C 305C B03 S19 S38 105F S10 S10 B04 323B 329C 420A 319A S08 319C 282E S02 S05 S04 283B S14 120A S17 120B 113D 113B 113C 409B 158A S16 113A 503C 503D ...

Page 27: ...FREEZER PARTS CAUTION Use the part number to order part not the position number 27 405C 404A 405A S20 330B S21 332A 149A 149B 284C 284A 329A 110D S22 147B 125A 131A ...

Page 28: ...RIGERATOR PARTS CAUTION Use the part number to order part not the position number 28 128A 170A 141B 141C 141A 141B 141C 141A 141C 141A 141B 141B 141C 141A 141C 141A 141B 154A 167B 151A 155B 151A 151C 128B ...

Page 29: ...r 29 241C 241C 205D 233A 203A 200A 201A 231A 281D 281D 281E 281E 234B 244A S25 S25 244B S25 212A S25 S25 S25 210A S26 210B 201A 281D 281E 244B 212A 607A 607A 244C 243A 283F 231A 281D 281E S27 244B 244A 607A 607A 244C 230A S25 S25 S25 S25 205D 241C 241A 241D 241B on some models ...

Page 30: ...P No 3828JL8015A MAR 2003 Printed in Korea ...

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