LG LRTN19320 Service Manual Download Page 29 | Manualshive

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8-2-4 Motor Damper Circuti

A reversible DC motor is used to open and close the damper.

To open the damper, push test button once.

To close the damper, push test button twice.

8-2-5 Damper Heater

* The damper heater is attached to the baffle and always will be on if the unit is powered on. The damper heater uses

12VDC.

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Summary of Contents for LRTN19320

Page 1: ...CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL REFRIGERATOR SERVICE MANUAL models LRTN22330 LRTN22320 LRTN19330 LRTN19320 ...

Page 2: ... refrigerator for electrical 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 C...

Page 3: ...th Resistance 0 14 Ohms Energy Consumption 19 cu ft 443 kWh yr Energy star 22 cu ft 468 kWh yr Energy star 1 4 NO LOAD PERFORMANCE CONTROL POSITION MID MID And Ambient of 70 F 90 F Fresh Food F 33 41 33 41 Frozen Food F 4 4 4 4 Percent Running Time 25 35 45 60 1 5 REFRIGERATION SYSTEM Minimum Compressor Capacity Vacuum 21 in Minimum Equalized Pressure 70 F 49 PSIG 90 F 56 PSIG Refrigerant R 134a 5...

Page 4: ...Floor Digital Sensor Control Leveling Screw inside Refrigerator Door Bin Egg Box Design A Door Icebeam Door Cooling Refrigerator Light Chef Fresh Snack Pan Shelves Can Dispenser OptiBin Crisper Base Grille Door Cooling Freezer Door Bin Freezer Light on some models 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: ...er 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 reverse order of disassembly Replacement bulb must be the same specification as the original Max 60 W 2EA 3 5 2...

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: ...BEST MODEL 5 CIRCUIT DIAGRAM 9 ...

Page 10: ...BETTER MODEL 10 ...

Page 11: ...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 12: ...tween No 5 and 6 of PTC Starter with a Tester Figure 13 Separate OLP from Compressor and check resistance value between two terminals of OLP with a Tester Figure 14 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 13 Figure 14 ...

Page 13: ...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 14: ...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 15: ...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 16: ...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 17: ...ECTOR to Start Position with power on Power On Start Position Ice Making Mode Harvest Mode Park Position Fill Test Mode Waits until water becomes cold after starting ice making operation Runs MOTOR to drop ice on tray from ICE BIN Performs Ice Making Mode after supplying water by operating SOLENOID in ICE VALVE With the detect lever checks if the ICE BIN is full To operate LINE and SERVICE press a...

Page 18: ...s in the park position and the ice maker mold is filled with water 2 The Ice Making Mode is terminated when the ice maker sensor reaches 19 F 7 C This may take between 1 and 4 hours 7 2 3 Harvest Mode 1 The Harves mode is initiated when the temperature is satisfied with the shut off arm in the down position 2 Once the Harvest mode is initiated the heater is operated for 30 seconds 3 After 30 secon...

Page 19: ... changes the time allowed for fill as illustrated in the chart Water supply amount TABLE NOTE Below is an example used by another vendor as an explanation of what is taking place 19 STAGE TIME TO SUPPLY INDICATIONS REMARKS 1 2 3 4 5 6 sec 7 sec 8 sec 9 sec 10 sec The water amount will vary depending on the water control Switch setting as well as the water pressure of the connected water line ...

Page 20: ... water supply control panel ERROR indicators in table can be checked only in TEST mode 20 STAGE ITEMS INDICATOR REMARKS 1 2 3 4 5 6 HEATER MOTOR HALL IC detection of position I VALVE HALL IC detection of full filled Ice II reset Five seconds after heater starts heater will go off if temperature recorded by sensor is 50 F 10 C or lever is in up position Five seconds after heater starts you can conf...

Page 21: ... be displayed and the key pads will be inoperable 3 Pressing and holding the KEY LOCK button for 3 seconds will reactivated the key pads 8 1 4 OFF Function 1 To turn off the Best model press and hold the F C button for 3 seconds To turn off the Better model press and hld the OFF key for 3 seconds 2 In the Off mode the Best model will display OFF in the control panel The OFF light will be displayed...

Page 22: ...f accumulated compressor run time after the initial power up or a power failure 2 After the initial defrost the defrost cycle is initiated after 7 hour of accumulated compressor run time 3 The defrost cycle will be terminated once the defrost sensor reaches 50 F 10 C 8 1 8 Electrical Parts Operates in Orders Electrical parts such as COMP defrost heater freezer FAN etc operate in the following orde...

Page 23: ...LED CHECK mode ERROR CODE sign Er Er Er Er Er FS rS dS rT dH Open or short circuited wire 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 connecting wires on each sensor Temperature FUSE cuts off HEATER cuts off DRAIN is clogged HEATER starts RELAY malfunctions NO ITEM DEFECT SIGNS CONT...

Page 24: ...ile 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 24 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 Cont...

Page 25: ...8 2 PCB FUNCTION 8 2 1 Power Circuit 1 Power is supplied to the control board at pins 1 and 3 of connector 1 25 ...

Page 26: ...hen the door of the freezer refrigerator is left open for 7 minutes or longer the lamp of the freezer refrigerator turns off automatically 26 Circuit Pin Number Pin Number Output Voltage Compressor Con2 pin7 Con1 pin1 115 VAC Condenser fan Con2 pin7 Con1 pin1 115 VAC Evaporator fan Con2 pin5 Con1 pin1 115 VAC Defrost heater Con2 pin3 Con1 pin1 115 VAC F R lamp Con2 pin1 Con1 pin1 115 VAC ...

Page 27: ...2 Open Door Circuit Door Monitor Circuit 27 Freezer or Refrigerator Measurement between pins 4 and 3 at Con 5 Both Closed 0 volts One door open 5 volts ...

Page 28: ...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 28 ...

Page 29: ... to open and close the damper To open the damper push test button once To close the damper push test button twice 8 2 5 Damper Heater The damper heater is attached to the baffle and always will be on if the unit is powered on The damper heater uses 12VDC 29 ...

Page 30: ...tton in the refrigerator temperature control and the COLDER ADJUST button in the freezer temperature control are pushed and held for 1 second or longer every LED on the display turns on at the same time When the buttons are released the previous mode is restored 30 Best Model Better Model ...

Page 31: ...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 32: ...or 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 Chec...

Page 33: ...8 5 MAIN PWB ASSEMBLY AND PARTS LIST 8 5 1 Main PWB Assembly 33 connector 4 connector 3 connector 6 connector 5 connector 2 connector 1 ...

Page 34: ...9A 318A 308A S07 314A 307A 312A 317A S06 S09 310A 327A 103A 105A 301A 283E 120A 103B 328A 145B 145A 282H B02 S13 282B 406B 418A 281A B01 281B 103C 305B 305B 305C 305C B03 S19 S17 S18 S18 175A 120B 503B 113A 503D 503C 503D 158C 113D 409B 409B 113B 113C 158A S16 S38 105F S10 S10 B04 323B 329C 420A 319A S08 319C S14 612A 610A S14 282E S02 S05 S04 283B S15 104B S14 S14 104B ...

Page 35: ...FREEZER PARTS CAUTION Use the part number to order part not the position number 35 405C 404A 409A 158E 405A S20 330B S21 332A 408A 149A 149B 143A S14 284C 284A 329A 116A S22 315B 315B 136A 143B ...

Page 36: ...art not the position number 36 170A 128A 146A 147C 147B 147A 147D 141D 149C 141E 149E 142B 142E S24 S24 142D 141B 128B 5 128C 128D 278C 278G 141C 141A 141C 141A 141B S24 140D 140A 5 140B 140E S24 S24 160B 167B 161A 151A 155B 151A 161A 160B 151C On some models ...

Page 37: ...03A 200A 201A 231A 281D 281D 205B 205D 5 205A 205A 205C 205C 281E 241A 241B 241E 241C 241D 237A 281E 205B 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 On some models ...

Page 38: ...ICE MAKER PARTS CAUTION Use the part number to order part not the position number 38 131A 600A 616E 623A S30 622A 616D 619A 602A S29 S31 S28 ...

Page 39: ... MAKER PARTS LOC 600A NON SERVICEABLE PARTS 39 501G 120H 629B 629C 629D 629E 613B 275C 613A 628E 404X 404Y 404Z 405D 628C 276A 510A 125D S32 S33 S34 S35 S36 629A 280E 501B 628A 628B 273A 275D 406D S37 S36 ...

Page 40: ...P No 3828JL8008A MARZO 2003 Printed in México ...

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