LG LRTN19314TT Service Manual
LG LRTN19314TT Manual
 |
View all LG LRTN19314TT manuals
Add to My Manuals
Save this manual to your list of manuals |
LG LRTN19314TT manual content summary:
- LG LRTN19314TT | Service Manual - Page 1
http://biz.lgservice.com REFRIGERATOR SERVICE MANUAL CAUTION PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL BEFORE CHECKING OR OPERATING THE REFRIGERATOR. LRSC26944SW, LRSC26944TT LRSC26930SW, LRSC26930TT LRSC26922SW, LRSC26922TT LRSC26920SW, LRSC26920TT LRSC26911SW, LRSC26911TT - LG LRTN19314TT | Service Manual - Page 2
CIRCUIT ...30 PWB PARTS DIAGRAM AND LIST...46 PWB CIRCUIT DIAGRAM ...52 OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 54 OPERATION PRINCIPLE...54 CONTROL METHOD ACCORDING TO FUNCTIONS...55 DEFECT DIAGNOSIS FUNCTION...57 CIRCUIT ...58 TROUBLE DIAGNOSIS ...61 TROUBLESHOOTING ...61 FAULTS ...71 - LG LRTN19314TT | Service Manual - Page 3
safety precautions to use the refrigerator safely and correctly and to prevent accident or injury when servicing. 1. Be careful of Please check for evidence of moisture intrusion in the electrical components. Replace the parts or mask with insulation tape if moisture intrusion was confirmed. 10. Do - LG LRTN19314TT | Service Manual - Page 4
@10G (320 cc) ITEMS DRIER CAPILLARY TUBE FIRST DEFROST DEFROST CYCLE DEFROSTING DEVICE ANTI-SWEAT HEATER ANTI-FREEZING HEATER FREEZER LAMP REFRIGERATOR LAMP DISPENSER LAMP SPECIFICATIONS MOLECULAR SIEVE XH-7 ID Ø0.83 4 - 5 Hours 13 - 15 Hours Heater, Sheath Dispenser Duct Door Heater Dispenser - LG LRTN19314TT | Service Manual - Page 5
@10G (320 cc) ITEMS DRIER CAPILLARY TUBE FIRST DEFROST DEFROST CYCLE DEFROSTING DEVICE ANTI-SWEAT HEATER ANTI-FREEZING HEATER FREEZER LAMP REFRIGERATOR LAMP DISPENSER LAMP SPECIFICATIONS MOLECULAR SIEVE XH-7 ID Ø0.83 4 - 5 Hours 13 - 15 Hours Heater, Sheath Dispenser Duct Door Heater Dispenser - LG LRTN19314TT | Service Manual - Page 6
@10G (320 cc) ITEMS DRIER CAPILLARY TUBE FIRST DEFROST DEFROST CYCLE DEFROSTING DEVICE ANTI-SWEAT HEATER ANTI-FREEZING HEATER FREEZER LAMP REFRIGERATOR LAMP DISPENSER LAMP SPECIFICATIONS MOLECULAR SIEVE XH-7 ID Ø0.83 4 - 5 Hours 13 - 15 Hours Heater, Sheath Dispenser Duct Door Heater Dispenser - LG LRTN19314TT | Service Manual - Page 7
@10G (320 cc) ITEMS DRIER CAPILLARY TUBE FIRST DEFROST DEFROST CYCLE DEFROSTING DEVICE ANTI-SWEAT HEATER ANTI-FREEZING HEATER FREEZER LAMP REFRIGERATOR LAMP DISPENSER LAMP SPECIFICATIONS MOLECULAR SIEVE XH-7 ID Ø0.83 4 - 5 Hours 13 - 15 Hours Heater, Sheath Dispenser Duct Door Heater Dispenser - LG LRTN19314TT | Service Manual - Page 8
Lamp Shelf Door Rack Drawer (Wire/Plastic) Door Rack Lower Cover Freezer Compartment Refrigerator Compartment OptiChill Display Humidity Switch -8- Water Filter Dairy Product Corner Lamp Shelf Can Server Grab and Go Egg Box Snack Drawer Bottle Guide Shelf Door Rack Vegetable Drawer OptiChill - LG LRTN19314TT | Service Manual - Page 9
Lamp Shelf Door Rack Drawer (Wire/Plastic) Door Rack Lower Cover Freezer Compartment Refrigerator Compartment OptiChill Display Humidity Switch -9- Water Filter Dairy Product Corner Lamp Shelf Grab and Go Wine Holder Egg Box Snack Drawer Bottle Guide Shelf Door Rack Vegetable Drawer OptiChill - LG LRTN19314TT | Service Manual - Page 10
Lamp Shelf Door Rack Drawer (Wire/Plastic) Door Rack Lower Cover Freezer Compartment Refrigerator Compartment Humidity Switch - 10 - Water Filter Dairy Product Corner Lamp Shelf Door Rack Wine Holder Egg Box Snack Drawer Bottle Guide Shelf Door Rack Vegetable Drawer Vegetable Drawer /Meat Drawer - LG LRTN19314TT | Service Manual - Page 11
Lamp Shelf Door Rack Drawer (Wire/Plastic) Door Rack Lower Cover Freezer Compartment Refrigerator Compartment Humidity Switch - 11 - Water Filter Dairy Product Corner Lamp Shelf Door Rack Wine Holder Egg Box Snack Drawer Bottle Guide Shelf Door Rack Vegetable Drawer Vegetable Drawer /Meat Drawer - LG LRTN19314TT | Service Manual - Page 12
1 Adjusting Screw 2 Driver Insert a driver · into the groove ³ if the adjusting screw and turn in the direction of the arrow (clockwise) until the refrigerator is level. Insert a driver · into the groove ³ if the adjusting screw and turn in the direction of the arrow (clockwise) until the - LG LRTN19314TT | Service Manual - Page 13
HOW TO INSTALL REFRIGERATOR 2. Filter Replace the filter when the indicator light comes on or the the system. NOTE: - To purchase replacement water filter cartridges, visit your local appliance dealer or part distributor. - You can also visit our website : www.lgappliances.com or call 1-877-714-7481. - LG LRTN19314TT | Service Manual - Page 14
supplied to the icemaker. 1. Pull out the ice bin shelf in the upper part of the freezer compartment. Caution : • Do not put hands or tools into the chute to confirm the operation of geared motor. It may damage the refrigerator or hurt your hands. 2 1 Water supply amount TABLE STAGE TIME TO SUPPLY - LG LRTN19314TT | Service Manual - Page 15
Avoid contact with the moving parts of the ejector mechanism, or with the heating element that releases the cubes. DO NOT place fingers or hands on the automatic icemaking mechanism while the refrigerator is plugged in. 3-2. Operation instructions A newly-installed refrigerator may take up to 24 - LG LRTN19314TT | Service Manual - Page 16
C C FILTER RESET F F HOLD 3SECS C F ROOM TEMP CRUSH FRZ TEMP REF TEMP 3 SECS LOCK DISPENSER & KEY EXPRESS/JET FRZ DISPENSER FREEZER REFRIGERATOR FILTER RESET/LIGHT LOOK 1-3. GR-L267AV(T)RA, GR-L267DV(T)R ON OFF CUBE WATER DIGITAL CONTROL FILTER C C FILTER RESET F F HOLD 3SECS - LG LRTN19314TT | Service Manual - Page 17
Freezer Control Refrigeration Control Medium refrigerator. • Refrigeration function is weak in the initial time. Please adjust temperature as above after using refrigerator refrigerator senses ambient temperature and displays the outside temperature in the upper of ROOM TEMP text on the display part - LG LRTN19314TT | Service Manual - Page 18
(or about 4,700 seconds of filter usage) before the filter must be replaced. The timer is started at the initial power up of the refrigerator. 2. After 6 months have passed the filter change FILTER LIGHT 3 SECS will appear on the display. It will show FILTER LIGHT 3 SECS. 3. After 6 months have - LG LRTN19314TT | Service Manual - Page 19
below whenever pressing EXPRESS/JET FRZ button. • The arrow mark graphic remains at the On status after flickering 4 times when selecting Special Refrigeration EXPRESS FRZ or JET FRZ. • EXPRESS FREEZE and JET FREEZE operate for a set time and then default to normal freezer operation. EXPRESS - LG LRTN19314TT | Service Manual - Page 20
compartment will operate at its usual setting even when EXPRESS FREEZING is selected or in progress. 6. If you select EXPRESS FREEZING, the refrigerator will default to its original setting at the end of the cycle. 7. If the defrost cycle is scheduled to come on while EXPRESS FREEZING is - LG LRTN19314TT | Service Manual - Page 21
, and a temperatur adjustment display at the top. 3. At initial power-up, the initial setting of the Optichill will be FRUIT VEGE. If only the refrigerator door is opened, the Optichill LED will be ON. 4. Each time you press the SELECT button, the selection cycles through the settings in the order - LG LRTN19314TT | Service Manual - Page 22
between the Optichill and the freezer, and a temperature control/display at the top. 3. At initial power-up, the Optichill defaults to FRUIT VEGE. If the refrigerator door is opened, the Optichill LED will be on. 4. When you press the SELECT button on the left, the LED will light and indicate the - LG LRTN19314TT | Service Manual - Page 23
-up, Express Freezing operation, or in response to a high load. The fan runs at the regular speed in all other circumstances. 3. When you open the refrigerator door while the fan is running at high speed, the MICOM will switch the fan to regular speed. If you open the freezer door or - LG LRTN19314TT | Service Manual - Page 24
. 4. The defrost cycle will not operate if the defrost sensor fails. 2-14. Refrigerator compartment lamp automatically off • The refrigerator light is turned ON and OFF by the refrigerator door switch. • If the refrigerator light is on for more than 7 minutes, it will be turned off automatically - LG LRTN19314TT | Service Manual - Page 25
in product Electromechanical parts of the appliance, such as sensor becomes less than 45°C (In power failure, service) POWER 0.3 sec. DEFROST HEATER 0.3 sec. DEFROST STEP MOTOR OFF C-FAN OFF HEATER ON DAMPER CLOSE The refrigerator will return to normal operation if you press the test switch - LG LRTN19314TT | Service Manual - Page 26
RPM (Middle part in the refrigerator compartment) 4 Abnormal defrost Er sensor dS Abnormal short circuit q Standard q No defrost q RPM 5 Failed defrosting Er dH Defrost heater, temperature fuse short q Standard q q q circuit, unplugged connector(indicated RPM 4 hour later after trouble - LG LRTN19314TT | Service Manual - Page 27
FUNCTION Note1) The freezer and refrigerator temperature displays are also used part turns on Abnormal: LED or LCD graphic on the (C) part turns off Normal: LED or LCD graphic on the (D) part turns on Abnormal: LED or LCD graphic on the (D) part turns off Normal: LEDs or LCDs graphic on the (E) part - LG LRTN19314TT | Service Manual - Page 28
will then default to the normal operation mode if not reset manually. 3. The function buttons are inoperable when the refrigerator is in test mode. 4. When you have finished using the test mode, reset the appliance manually by unplugging it for several seconds. 5. If nonconforming contents such as - LG LRTN19314TT | Service Manual - Page 29
FUNCTION 2-18. Function of built-in ice and water dispenser. 1. This feature allows dispensing of ice and water without having to open the refrigerator door. 2. Select CUBES, CRUSHED ICE, or WATER. Then press the dispenser switch. The duct door is operated by a solenoid. This door closes 5 seconds - LG LRTN19314TT | Service Manual - Page 30
high voltage (160 Vdc) is maintained at the power terminal, wait at least 3 minutes after unplugging the appliance to check the voltages to allow the current to dissipate. Voltage of every part is as follows: Part Voltage VA1 120 Vac CE1 160 Vdc CE2 14 Vdc CE3 12 Vdc CE4 15.5 Vdc CE5 - LG LRTN19314TT | Service Manual - Page 31
calculation related to the transmission of data and calculations made by the MICOM (IC1). The oscillator (OSC1) must always be replaced with an exact rated part, because if this spec is changes, the time calculations of the MICOM will be affected and it might not work at all. GR-L267**** 1-3. Reset - LG LRTN19314TT | Service Manual - Page 32
. It will resume operation when the door is closed. 1) GR-L267**** Type of Load Frost Removal AC Converting Refrigerator Compressor Heater Relay LAMP Dispensor Heater Magic room Heater Measuring part (IC6) Status ON OFF IC6-14 IC6-10 IC7-16 IC6-13 Within 1 V 12 V IC6-11 IC6-12 - LG LRTN19314TT | Service Manual - Page 33
FOR MICOM CIRCUIT 2. Dispenser operation circuit 1) Check load driving status Type of Load GEARED MOTOR Measuring part Status ON OFF IC7-15 2) Lever Switch sensing circuit Measuring part Lever S/W On(Press) OFF SOLENOID CUBE WATER VALVE WATER IC7-14 Within 1 V 12 V IC7-13 IC1 - LG LRTN19314TT | Service Manual - Page 34
EXPLANATION FOR MICOM CIRCUIT 3. Door opening sensing circuit 1) GR-L267**** Measuring part Door of Freezer / Refrigerator Closing Opening IC1 (MICOM) No. 47, 46 Pin 5 V ( A - B , C - D . Switch at both ends are at Off status) 5 V ( A - B , C - D . Switch at both ends are at On status) ✽ Since - LG LRTN19314TT | Service Manual - Page 35
the efficiency of the defrost operation. See the table below for voltages and checkpoints. SENSOR Freezing sensor Defrost sensor Refrigerator sensor 1 Refrigerator sensor 2 Room temperature sensor Water tank sensor Optichill sensor CHECK POINT POINT A Voltage POINT B Voltage POINT C Voltage POINT - LG LRTN19314TT | Service Manual - Page 36
Switch entry circuit The following circuits are sensing signal form the test switch, damper motor reed switch for testing and diagnosing the refrigerator. 1) GR-L267**** R25 37 P34 CC10 223 1-7. Option designation circuit (model separation function) 1) GR-L267**** R24 48 P47 47 P46 The circuits - LG LRTN19314TT | Service Manual - Page 37
EXPLANATION FOR MICOM CIRCUIT 1-8. Stepping motor operation circuit TA7774F CON9 R56 R57 R58 The motor is driven by magnetism formed in the areas of the coils and the stator. Rotation begins when a HIGH signal is applied to MICOM Pin 33 of IC10 (TA7774F). This causes an output of HIGH and LOW - LG LRTN19314TT | Service Manual - Page 38
the fan motor by cutting off power to the fan when it senses a lock-up condition. 1) GR-L267**** Motor OFF Motor ON a , d part 5V 2 ~ 3V b part 2V or less 12 ~ 14V e part 2V or less 8 ~ 16V c , f part 0 V 0 V COMPRESSOR -FAN PWM COMPRESSOR -FAN LOCK FREEZER-FAN PWM FREEZER-FAN LOCK - 38 - - LG LRTN19314TT | Service Manual - Page 39
Cooler u Temperature compensation table by adjustment value (difference value against current temperature) Ex) If you change compensation resistance at a refrigerator (RCR1) from 10 kΩ (current resistance) to 18 kΩ (modified resistance), the temperature at the cold storage will increase by - LG LRTN19314TT | Service Manual - Page 40
u Temperature compensation at the freezer is performed the same as at the refrigerator. The value for the freezer is twice that of the refrigerator. u This circuit enters the necessary level of temperature compensation for adjusting the appliance. The method is the same for every model in this - LG LRTN19314TT | Service Manual - Page 41
CUT CUT CUT CUT Temperature compensation value at refrigerator 0 °C (In shipment from factory) -1 °C [-1.8 °F] -1 °C [-1.8 °F] +1 °C [+1.8 °F] +1 °C [+1.8 °F] -2 °C [-3.6 °F] +2 °C [+3.6 °F] 0 °C [0 °F] 0 °C [0 °F] 0 °C [0 °F] 0 °C [0 °F] -1 °C [-1.8 °F] +1 °C [+1.8 °F] 0 °C [0 °F] Remarks u This - LG LRTN19314TT | Service Manual - Page 42
) dedicated MICOM 1) GR-L267**** PWB ASSEMBLY DISPLAY ICEBEAM COOLING OFF CUBE WATER CRUSH F 5 4 3 2 1 FILTER F MONTH F ROOM TEMP 3 SECS DISPENSER & KEY EXPRESS/JET FRZ DISPENSER FREEZER REFRIGERATOR FILTER/LIGHT LOOK - 42 - - LG LRTN19314TT | Service Manual - Page 43
of error. u Resistance of the cold storage sensor 1 and 2 shall be measured with a digital tester after separating CON8 of the PWB ASSEMBLY and the MAIN part. u Resistance of the freezing sensor shall be measured with a digital tester after separating CON7 of the PWB ASSEMBLY and the MAIN - LG LRTN19314TT | Service Manual - Page 44
EXPLANATION FOR MICOM CIRCUIT 1-12. OptiChill stepping MOTOR/Display 1) GR-L267AV(T)BA, GR-L267AV(T)FA MODEL DAMPER HEATER OPTICHILL OPTICHILL STEPPING MOTOR OPTICHILL SENSOR 1-13. Jet freezing 1) GR-L267AV(T)BA, GR-L267AV(T)FA MODEL - 44 - P W B A S S E M B L Y D IS P L A Y JET/FREEZER BOX FAN - LG LRTN19314TT | Service Manual - Page 45
EXPLANATION FOR MICOM CIRCUIT 2. PWB parts diagram and list 2-1. PWB Assembly, main part diagram 1. GR-L267**** - 45 - - LG LRTN19314TT | Service Manual - Page 46
EXPLANATION FOR MICOM CIRCUIT 2-2. Parts list 1. GR-L267**** - 46 - - LG LRTN19314TT | Service Manual - Page 47
EXPLANATION FOR MICOM CIRCUIT - 47 - - LG LRTN19314TT | Service Manual - Page 48
EXPLANATION FOR MICOM CIRCUIT 2-3. GR-L267AV(T)BA 1. DISPLAY ASSEMBLY part diagram - 48 - - LG LRTN19314TT | Service Manual - Page 49
EXPLANATION FOR MICOM CIRCUIT 2. DISPLAY circuit diagram - 49 - - LG LRTN19314TT | Service Manual - Page 50
EXPLANATION FOR MICOM CIRCUIT 2-4. GR-L267AV(T)FA, GR-L267AV(T)RA, GR-L267D(A)TR 1. DISPLAY ASSEMBLY part diagram - 50 - - LG LRTN19314TT | Service Manual - Page 51
EXPLANATION FOR MICOM CIRCUIT 2. DISPLAY circuit diagram P W B A S S E M B L Y D IS P L A Y - 51 - - LG LRTN19314TT | Service Manual - Page 52
EXPLANATION FOR MICOM CIRCUIT 3. PWB Circuit Diagram may vary according to model. 1. GR-L267**** REFREF- - 52 - - LG LRTN19314TT | Service Manual - Page 53
P C B A S S E M B L Y D IS P L A Y EXPLANATION FOR MICOM CIRCUIT ROOM-SENSOR WATER TANK -SENSOR FREEZER-SENSOR DEFROST-SENSOR FRZ-DOOR SWITCH JET FREEZER BOX FAN MOTOR REF-DOOR SWITCH REF-UPPER-SENSOR REF-LOWER-SENSOR DAMPER HEATER OPTICHILL OPTICHILL STEPPING MOTOR OPTICHILL BOX FAN MOTOR - LG LRTN19314TT | Service Manual - Page 54
by operating the SOLENOID in ICE VALVE. • With the detect lever, checks if the ICE BIN is full. Test Mode • To operate LINE and SERVICE, press and hold the water supply control switch for 3 seconds. The icemaker will run through 3 stages: Dump Fill Icemaking. 1. Turning the Icemaker stop switch - LG LRTN19314TT | Service Manual - Page 55
OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 2. Control Method according to Functions 2-1. Start Position 1. After POWER OFF or Power Outage, check the EJECTOR's position with MICOM initialization to restart. 2. How to check if it is in place: - Check HIGH/LOW signals from HALL SENSOR in MICOM - LG LRTN19314TT | Service Manual - Page 56
for test) has completed, and the EJECTOR is in place, this control operates the ICE SOLENOID by time check in the compressor enclosure of the refrigerator. Then it supplies water to the ice making tray. 2. The water supply level is adjustable to 5 levels by pressing the water supply control switch - LG LRTN19314TT | Service Manual - Page 57
OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER 2-5. Function TEST 1. This is a compulsory operation for TEST, SVC, cleaning, etc. It is operated by pressing the water supply control KEY for 3 seconds. 2. It operates in the Icemaking mode, but not in the Ice-Removing mode or water supply process. - LG LRTN19314TT | Service Manual - Page 58
CIRCUIT FREEZER-FAN COMPRESSOR-FAN FREEZER FREEZER-SENSOR GR-L267**BA FREEZER-LAMP FREEZER-LAMP FREEZER-DOOR SWITCH DISPENSER LEVER SWITCH REF-UPPER REF-LOWER REF REF-LAMP REF-LAMP REF-LAMP REF-LAMP REF-DOOR SWITCH - 58 - - LG LRTN19314TT | Service Manual - Page 59
CIRCUIT FREEZER COMPRESSOR FREEZER FREEZER GR-L267**FA FREEZER-LAMP FREEZER-DOOR SWITCH ICEMAKER KIT REF-UPPER REF-LOWER REF REF-DOOR SWITCH - 59 - - LG LRTN19314TT | Service Manual - Page 60
CIRCUIT FREEZER COMPRESSOR FREEZER FREEZER REF-UPPER REF-LOWER REF GR-L267**R(A) FREEZER-LAMP FREEZER-DOOR SWITCH DISPENSER LEVER SWITCH REF - 60 - - LG LRTN19314TT | Service Manual - Page 61
TROUBLE DIAGNOSIS 1. TroubleShooting CLAIMS. CAUSES AND CHECK POINTS. 1. Faulty start 1) No power at connection. 4) During defrost. Start automatic defrost. Cycle was set at defrost when the refrigerator was produced. s Check the resistance of both terminals. At normal temperature 6: OK. - LG LRTN19314TT | Service Manual - Page 62
TROUBLE DIAGNOSIS CLAIMS. 2. No cooling. CAUSES AND CHECK POINTS. 2) Refrigeration system is clogged. Moisture clogged. . Moisture penetration - Leave it in the air. - Moisture penetration. into the refrigeration oil. Weld joint clogged. Short pipe insert. Pipe gaps. Too large. Damaged - LG LRTN19314TT | Service Manual - Page 63
TROUBLE DIAGNOSIS CLAIMS. 3. Refrigeration is weak. CAUSES AND CHECK POINTS. 1) Refrigerant Partly leaked. Weld joint leak. Parts leak. HOW TO CHECK 2) Poor defrosting capacity. Drain path (pipe) clogged. Inject adiabatics into drain hose. Inject through the hole. Seal with drain. s Check - LG LRTN19314TT | Service Manual - Page 64
TROUBLE DIAGNOSIS CLAIMS. 3. Refrigeration is weak. CAUSES AND CHECK POINTS. Residual frost. Weak heat from : NG. Door switch. Faults. Contact distance. Button pressure. Melted contact. Contact. Refrigerator and freezer switch reversed. Button is not pressed. Poor door attachment. Door liner - LG LRTN19314TT | Service Manual - Page 65
TROUBLE DIAGNOSIS CLAIMS. 3. Refrigeration is weak. CAUSES AND CHECK POINTS. 4) No cooling air circulation. Bent. Ice and foreign materials on rotating parts. HOW TO CHECK 5) Compressor capacity. Rating misuse. Small capacity. Low valtage. 6) Refrigerant too much or too little. Malfunction of - LG LRTN19314TT | Service Manual - Page 66
TROUBLE DIAGNOSIS CLAIMS. 4. Warm refrigerator compartment temperature. CAUSES AND CHECK POINTS. 1) Colgged cooling temperature. Space is secluded. s Inspect parts measurements and check visually. 5) Refrigerant leak. 6) Inadequate of refrigerant. 7) Weak compressor discharging power. 8) Fan - LG LRTN19314TT | Service Manual - Page 67
TROUBLE DIAGNOSIS CLAIMS. 6. Condensation and ice formation. CAUSES AND CHECK POINTS. 4) Condensation on Wing sag(lower part). Door liner shape mismatch. Corner. Too much notch. Broken. Home Bar heater is cut. 5) Water on the floor. Condensation in the refrigerator compartment. Defrosted - LG LRTN19314TT | Service Manual - Page 68
TROUBLE machine sound. Bad connection. Partly damaged. Condenser drain sound. Sounds from fan contact. Fan guide contact. Shroud burr contact. Supporter disorted. Tilted during motor assembly. Resonance. Evaporator noise. Evaporator pipe contact. -- No damping evaporator. Sound from refrigerant - LG LRTN19314TT | Service Manual - Page 69
TROUBLE DIAGNOSIS CLAIMS. 8. Faulty lamp (freezer and refrigerator compartment). CAUSES AND CHECK POINTS. 1) Lamp problem. 2) Bad lamp assembly. 3) Bad lamp Touching evaporator pipe. 3) Faulty parts. Transformer. Coil contacts cover. Welded terminal parts contact cover. Compressor. Bad - LG LRTN19314TT | Service Manual - Page 70
TROUBLE DIAGNOSIS CLAIMS. 10. Structure, appearance, and others. 1) Door foam. Sag. Noise during is No stopper. closed (faulty stopper). HOW TO CHECK 2) Odor. Temperature of High. refrigerator compartment. Deodorizer. No deodorizer. Poor capacity. Faulty damper control. Button is set at weak - LG LRTN19314TT | Service Manual - Page 71
TROUBLE DIAGNOSIS - 71 - 2. Faults 2-1. Power Problems Causes Checks Measures No power on outlet. - Power - Check other parts. - During forced operation: - Operates: Check other parts. - Not operate: Replace the frozen compressor with new one, weld, evacuate, and recharge refrigerant. • Refer - LG LRTN19314TT | Service Manual - Page 72
TROUBLE DIAGNOSIS - 72 - 2-3. Temperature Problems Causes Checks Measures Remarks High temperature in the freezer compartment. Poor cool air circulation due to faulty - Lock -- Check resistance with a fan motor. tester. 0Ω: short. ∞Ω: cut. - Rotate rotor manually and check rotation. - - LG LRTN19314TT | Service Manual - Page 73
TROUBLE DIAGNOSIS - 73 - 2-4. Cooling Problems Causes High temperature in the freezer compartment. Refrigerant leak. Shortage of refrigerant. Checks Measures Remarks Check sequence Weld the leaking part, recharge the 1. Check the welded parts of the refrigerant. drier inlet and outlet - LG LRTN19314TT | Service Manual - Page 74
pipe weld joint (discharge) in compressor. Check sequence. Replace the compressor, weld, 1. Manually check whether evacuate, and recharge refrigerant. condenser is warm, It is not warm and the frost forms partly on the evaporator in the freezer compartment. Drier must be replaced. Faulty - LG LRTN19314TT | Service Manual - Page 75
TROUBLE DIAGNOSIS - 75 - 2-5. Defrosting failure Problems Causes Checks Measures Remarks No defrosting . 3) Check the water outlet. 4) Push the heater plate to suction duct manually and assemble the disconnected parts. Gap between Suction duct and Heater plate (Ice in the gap). 1. Confirm - LG LRTN19314TT | Service Manual - Page 76
TROUBLE DIAGNOSIS - 76 - Problems Causes Checks Measures No defrosting Melting fuse blows. 1) Lead wire is cut. 2) Bad soldering. - Check melting fuse with tester. If 0Ω: OK. If ∞Ω: wire is cut. Faullty parts: parts Raise the front side (door side), support the front side legs, and let the - LG LRTN19314TT | Service Manual - Page 77
. (After forced defrosting, check ice in the evaporator and pipes.) - Check the defrost related parts if problem is caused by faulty defrosting. 2) Faulty door or refrigerator compartment. - Faulty gasket. - Faulty assembly. - Check gasket attached conditions. - Check door assembly conditions - LG LRTN19314TT | Service Manual - Page 78
TROUBLE DIAGNOSIS - 78 - Problems Causes Checks Measures Remarks Ice in the freezer 1) Bad cooling parts related to defrosting if the problem is caused by the faulty defrosting. - Replace when it can not be repaired. 3) Over freezing in the freezer compartment. - Faulty MICOM. - Refrigerator - LG LRTN19314TT | Service Manual - Page 79
TROUBLE DIAGNOSIS - 79 - 2-7. Sound Problems Hiss sound Causes Checks Measures 1. Loud sound of compressor 1.1 Check the level of the 1) Maintain horizontal level. operation. refrigerator change of the fan guide. sound). 7) Leave a clearance between interfering parts and seal gaps in - LG LRTN19314TT | Service Manual - Page 80
TROUBLE DIAGNOSIS - 80 - Problems Causes Checks Measures Vibration sound. 1. Vibration of shelves and foods in Clack. the refrigerator. 2. 5. Other structure and parts vibration. 1-1. Remove and replace the 1) Reassemble the vibrating parts shelves in the refrigerator and insert foam or - LG LRTN19314TT | Service Manual - Page 81
TROUBLE DIAGNOSIS - 81 - Problems Causes Checks Measures Sound Popping It happens when refrigerant expands - Check the sound of refrigerant at the - Check the restrainer attached on the (almost the same at the end of capillary tube. initial installation. evaporator and capillary tube weld - LG LRTN19314TT | Service Manual - Page 82
TROUBLE DIAGNOSIS - 82 - 2-8. Odor Problems Food Odor. Causes Food (garlic, kimchi, etc) Checks wet food is wrapped with plastic bowl and bag. - It happens in the new refrigerator. - Clean the refrigerator. - Persuade customers not to use plastic bag or wraps with wet food or odorous foods - LG LRTN19314TT | Service Manual - Page 83
TROUBLE DIAGNOSIS - 83 - 2-9. Micom Problems Symptom Bad PCB All display electric power. and 3 pins are cut when power is off. Replace regulator. Replace PCB fuse. Replace parts. Refer to electric circuit in circuit explanation. Applicable to model with dispenser. Bad connection between - LG LRTN19314TT | Service Manual - Page 84
TROUBLE DIAGNOSIS - 84 - Problems (main PCB sensor Order by model number housing). and part number. Repair main PCB sensor housing Refer to resistance fan switch (freezer, driving circuits in motor after pressing test switch refrigerator, and circuit of Main PCB. If the voltage is home - LG LRTN19314TT | Service Manual - Page 85
TROUBLE DIAGNOSIS - 85 - Problems Bad cooling Symptom Wrong Refrigerator temperature. Causes Checks Measures Remarks Defective Step Motor Damper. Check Step Motor damper motor and reed switch and lead wire are cut. Check Step Motor damper part. Check Step Motor damper Motor driving relay in - LG LRTN19314TT | Service Manual - Page 86
TROUBLE DIAGNOSIS - 86 - Problems Symptom Causes Checks Measures Remarks Bad defrost. Defrost is not PCB to door switch. Defective door switch parts. Check lead wire related to door switch with a tester. Refer to door switch in parts repair guide. Repair lead wire. Replace door switch. - LG LRTN19314TT | Service Manual - Page 87
Problems Symptom Causes Defective Buzzer does Trouble mode indication. display button. not sound and buttons do not operate. Checks Check trouble diagnosis function. Measures Repair troubles a tester. Refer to door switch in parts repair guide. Replace lever switch. Check voltage change at - LG LRTN19314TT | Service Manual - Page 88
TROUBLE DIAGNOSIS 3. Cooling Cycle Heavy Repair 3-1. The Heavy Repair Standards for Refrigerator with R134a Refrigerant NO. Items Unit Standards blow dry air or N2 gas for more than 1 min use the parts. 4 Refrigeration Evacuation Cycle. time Min. More than 40 minutes. To remove moisture. - LG LRTN19314TT | Service Manual - Page 89
Trouble diagnosis Contents Tools Remove refrigerant Residuals Parts replacement and welding Vacuum Refrigerant charging and charging inlet welding Check refrigerant . - Check cooling capacity ➀ Check radiator manually to see if warm. ➁ Check hot line pipe manually to see if warm. ➂ Check frost - LG LRTN19314TT | Service Manual - Page 90
TROUBLE DIAGNOSIS 3-3. Precautions During Heavy Repair Items Precautions 1. Use of tools. 1) Use special parts and tools for R134a. 2. Recovery of refrigerant. 1) Continue to recover the refrigerant for more than 5 minutes after turning the refrigerator off. 2) Install a piercing type valve on - LG LRTN19314TT | Service Manual - Page 91
from the system. When the refrigerant has been recovered, install a piercing type valve on the low pressure side. IT IS IMPORTANT TO OPEN THE SYSTEM IN THIS ORDER TO KEEP THE OIL FROM BEING FORCED OUT. The use of piercing type valves will allow future servicing and eliminates the possibility of - LG LRTN19314TT | Service Manual - Page 92
TROUBLE DIAGNOSIS Items 4. Vacuum degassing. Compressor Precautions Evaporator Suction pipe Hot Line Drier Condenser 3 2 1 Blue Low pressure Yellow Red High pressure 5. Refrigerant charging. KEY POINT Vaccum Pump - If power is applied during vacuum degassing, vacuum degassing shall be - LG LRTN19314TT | Service Manual - Page 93
TROUBLE DIAGNOSIS Items 6. Gas-leakage test 7. Pipe arrangement in each cycle Precautions Evaporator Compressor Hot Line Drier Condenser Charging Canister 4) Refrigerant Charging Charge refrigerant while operating a compressor as shown above. 5) Pinch the charging pipe with a pinch-off plier - LG LRTN19314TT | Service Manual - Page 94
TROUBLE DIAGNOSIS 3-6. Brazing Reference Drawings PIPE ASSEMBLY, HOT LINE (Freezer) Copper Brazer Copper Brazer CAPI - TUBE DRIER ASSEMBLY PIPE ASSEMBLY, SUCTION PIPE ASSEMBLY, JOINT Copper Brazer - LG LRTN19314TT | Service Manual - Page 95
TROUBLE DIAGNOSIS 4. HOW TO DEAL WITH CLAIMS 4-1. Sound Problems Hiss sounds Checks and Measures s Explain general principles of sounds. • All refrigerators make noises when they run. The compressor and fan produce sounds. There is a fan in the freezer compartment which blows cool air to freezer - LG LRTN19314TT | Service Manual - Page 96
TROUBLE DIAGNOSIS Problems Sounds of water flowing Checks and Measures s Explain the flow of refrigerant. • When the refrigerator stops, the water flowing sound happens. This sound happens when the liquid or vapor refrigerant tank in the lower part of the refrigerator compartment. The water is - LG LRTN19314TT | Service Manual - Page 97
TROUBLE DIAGNOSIS 4-2. Measures for Symptoms on Temperature Problems Checks and Measures Refrigeration is weak. s Check temperature set in the temperature control knob. • Refrigerator is generally delivered with the button set at normal use (MID). But customer can adjust the temperature set - LG LRTN19314TT | Service Manual - Page 98
TROUBLE DIAGNOSIS 4-3. Odor and Frost Problems Checks and Measures Odor in the refrigerator compartment. s Explain the basic principles of food odor. • Each food has its own particular odor. Therefore it is impossible to prevent or avoid food odor - LG LRTN19314TT | Service Manual - Page 99
TROUBLE DIAGNOSIS 4-5. Others Problems The refrigerator case is hot. Small holes in a door liner Electric bills are too much. Condensation on the inside wall of the refrigerator a manual. There are small holes in the plastic liner of some parts of the refrigerator. These holes allow plastic parts to - LG LRTN19314TT | Service Manual - Page 100
Line (3) Disconnect upper hinge ቢ from the hinge supporter ባ by grasping the front part of upper hinge and lifting up (Hinge Assembly, (5) Assembly is the reverse order of disassembly Note : • When disconnecting refrigerator door, turn hinge lever counterclockwise. • If the hinge or bracket are - LG LRTN19314TT | Service Manual - Page 101
HOW TO DISASSEMBLE AND ASSEMBLE 2. HANDLE 1. Aluminum Handle Model 1) Use a small screwdriver blade in the groove at the side of the Deco Handle to lift and separate the cover. Twist down in the direction of arrow ቢ and lift the cover in the direction of arrow ባ. 2. Plastic handle Model 1) Use a - LG LRTN19314TT | Service Manual - Page 102
. 5) Loosen two screws. 6) Disassembly of shroud. F (U) : Disconnect housing of B after removing two rail guides with a screwdriver blade. 7) Disassembly of shroud. F (U) : Hold upper part and pull forward. 8) Check foam sticking conditions around a shroud, F (U) and F (L) during assembling. If - LG LRTN19314TT | Service Manual - Page 103
one end of the spring into the right hole of the dispenser lever and insert the other end into the right hole in the top part of the dispenser. Then attach the holder at the solenoid switch. Sheet Heater Spring Solenoid Assembly Dispenser Lever - 103 - - LG LRTN19314TT | Service Manual - Page 104
AND ASSEMBLE 7) Dispenser Related Parts 7 10 9 8 17 15 14 16 4 11 24 19 11 277A 1 FRAME ASSEMBLY, DISPLAY 2 DISPENSER COVER 4 PWB(PCB) ASSEMBLY, DISPLAY 7 FUNNEL ASSEMBLY 8 MICRO SWITCH 9 FUNNEL FRAME 10 LEVER(SWITCH) 11 FUNNEL 12 FUNNEL GUIDE 13 ROCKER SWITCH 14 SOLENOID - LG LRTN19314TT | Service Manual - Page 105
EXPLODED VIEW FREEZER DOOR PART: GR-L267AV(T)*A * : Optional part 210A 210B* 210B * 200A 202A 205E 205A 205C 205B 205D 205F 210C 201A 203A - 105 - - LG LRTN19314TT | Service Manual - Page 106
EXPLODED VIEW REFRIGERATOR DOOR PART: GR-L267AV(T)*A * : Optional part 241C 241B 147C * 147B 147A 242A 242C 242D 242B 242B 242A* 242C 242D 240A 243A 240C 241A 230A 232A 239A 205A 205E 205C 205B 205D 205F 231A 233A - 106 - - LG LRTN19314TT | Service Manual - Page 107
EXPLODED VIEW FREEZER COMPARTMENT: GR-L267AV(T)*A * : Optional part 271B 270A 270C 402A 271A 128G* 152A 128H* 128D* 128D 128F 139B* 403C 128C* 128C 128E 272A 103A 105B 137A 136D 403A 136C 136B 329A - LG LRTN19314TT | Service Manual - Page 108
EXPLODED VIEW REFRIGERATOR COMPARTMENT: GR-L267AV(T)*A * : Optional part 140A 152A 152A 177A 140B 270B 270D 402A 271B 140C 271C 624D 624B 624C 171B 116A 115A 624A 171A 141C 146B* 141A 141B 146A * 151A - LG LRTN19314TT | Service Manual - Page 109
EXPLODED VIEW ICE & WATER PART: GR-L267AV(T)*A * : Optional part 612C 612A 612B 621B 600B 625A 618A 616F 616G 627A 616E 616D 621C 619A 404A 611B 610A 611A 611C 600A 614A 613A 611D 404B 606A - 109 - - LG LRTN19314TT | Service Manual - Page 110
EXPLODED VIEW MACHINE COMPARTMENT: GR-L267AV(T)*A * : Optional part 502A 411A 410H 410G 101A 500A 502B 101B 313A 303A 303B 303C 303D 301A 310B 307A 104A 309A 403B 309B 309C 308B 310A 304A 300A 307A 317A 317B 306A 305B 305C 305A 308C 308A 305C 305B - 110 - - LG LRTN19314TT | Service Manual - Page 111
EXPLODED VIEW DISPENSER PART: GR-L267AV(T)*A * : Optional part 278A 278B 278C 402C 278F 275A 276A 405A 275D 279D 280D 501A* 280E 275C 275B 278G 281A 279E 279B 280F 277A 276B 401C 279C 280G 280C 280B 279A - 111 - - LG LRTN19314TT | Service Manual - Page 112
EXPLODED VIEW FREEZER DOOR PART: GR-L267DV(T)R 210A 210C 210C 210C 200A 202A 205E 205A 205C 201A 203A - 112 - - LG LRTN19314TT | Service Manual - Page 113
EXPLODED VIEW REFRIGERATOR DOOR PART: GR-L267DV(T)R 241C 241B 147A 240A 243A 240A 243A 240A 240C 241A 230A 232A 239A 205E 205B 205D 231A 233A - 113 - - LG LRTN19314TT | Service Manual - Page 114
EXPLODED VIEW FREEZER COMPARTMENT: GR-L267DV(T)R 271B 270A 270C 402A 271A 152A 137A 136D 403A 136C 136B 329A 135A 128D* 128D 128F 128C* 128C 128E 272A 103A 105B 400A 302B 401A 130A 408A 120B 120B 120C * 135B 312A 125A * 126A * - 114 - - LG LRTN19314TT | Service Manual - Page 115
EXPLODED VIEW REFRIGERATOR COMPARTMENT: GR-L267DV(T)R 140A 140C 270B 270D 402A 271B 271C 624D 624B 624C 171B 171A 116A 115A 624A 141C 140D 141A 141B 152A 177A 177B - LG LRTN19314TT | Service Manual - Page 116
EXPLODED VIEW ICE & WATER PART: GR-L267DV(T)R 612C 612A 612B 621B 600B 625A 618A 616F 616G 627A 616E 616D 621C 619A 404A 611B 610A 611A 611C 600A 614A 613A 611D 404B 606A - 116 - - LG LRTN19314TT | Service Manual - Page 117
EXPLODED VIEW MECHANICAL COMPARTMENT: GR-L267DV(T)R 502A 411A 410H 410G 101A 500A 502B 101B 313A 303A 303B 303C 303D 301A 310B 307A 104A 309A 403B 309B 309C 308B 306C 310A 304A 300A 307A 317A 317B 306A 305B 305C 305A 308C 308A 305C 305B - 117 - - LG LRTN19314TT | Service Manual - Page 118
EXPLODED VIEW DISPENSER PART: GR-L267DV(T)R 278A 278B 278C 402C 278F 275A 276A 278G 405A 275D 279D 280D 501A* 280E 275C 275B 281A 279E 278G 279B 280F 277A 276B 401C 279C 280G 280C 280B 279A - 118 - - LG LRTN19314TT | Service Manual - Page 119
P/No. 3828JD8589B AUG., 2003 Printed in Korea
-
1 -
2 -
3 -
4 -
5 -
6 -
7 -
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
17
-
18
-
19
-
20
-
21
-
22
-
23
-
24
-
25
-
26
-
27
-
28
-
29
-
30
-
31
-
32
-
33
-
34
-
35
-
36
-
37
-
38
-
39
-
40
-
41
-
42
-
43
-
44
-
45
-
46
-
47
-
48
-
49
-
50
-
51
-
52
-
53
-
54
-
55
-
56
-
57
-
58
-
59
-
60
-
61
-
62
-
63
-
64
-
65
-
66
-
67
-
68
-
69
-
70
-
71
-
72
-
73
-
74
-
75
-
76
-
77
-
78
-
79
-
80
-
81
-
82
-
83
-
84
-
85
-
86
-
87
-
88
-
89
-
90
-
91
-
92
-
93
-
94
-
95
-
96
-
97
-
98
-
99
-
100
-
101
-
102
-
103
-
104
-
105
-
106
-
107
-
108
-
109
-
110
-
111
-
112
-
113
-
114
-
115
-
116
-
117
-
118
-
119
 |
 |
CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
REFRIGERATOR
SERVICE MANUAL
LRSC26944SW, LRSC26944TT
LRSC26930SW, LRSC26930TT
LRSC26922SW, LRSC26922TT
LRSC26920SW, LRSC26920TT
LRSC26911SW, LRSC26911TT
LRSC26910SW, LRSC26910TT