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1-8. Stepping motor operation circuit

For motor driving method, rotation magnetism is formed at coils wound on each phase of motor and stator and so motor
becomes to rotate if applying High signal to the IC8 (TA777AF) at the MICOM PIN 33 and outputting High, Low signal by
step numbers fixed through MICOM PIN 34 and 35,.

Explanation) For driving method of the stepping motor, send signals in the cycle of 3.33 mSEC using terminal of MICOM

PIN 33, 34 and 35 as shown in wave form of the following part.
These signals are output to the output terminal (No.10, 11, 14, 15) via the input terminal (No. 3, 6, 8) of the
IC10 (TA7774F) as IC for motor driving. Output signals allow motor coils wound on each phase of stator to
form rotation magnetic field and the motor to rotate. Inputting as below figure to the input terminal (INA, INB)
as IC (TA7774AF) for motor driving allows motor coils wound on each phase of stator to form rotation
magnetic field and the stepping motor damper to rotate

EXPLANATION FOR MICOM CIRCUIT

- 39 -

TA7774F

INA

INB

A

B

A

B

CCW (Reverse rotation)

(Positive rotation) CW

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Содержание LRSPC2051AB

Страница 1: ...PRECAUTIONS OF THIS BOOK BEFORE CHECKING OR OPERATING THE REFRIGERATOR REFRIGERATOR SERVICE MANUAL MODEL LRSPC2051AB LRSPC2051BM LRSPC2051ST COLOR ATLANTIC BLUE BLACK MIRROR STAINLESS STEEL http biz lgservice com Ref No GR L207NGUA GR L207NSUA ...

Страница 2: ...T FREEZER 44 PWB PARTS DRAWING AND LIST 47 PWB CIRCUIT DIAGRAM 57 ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 61 WORKING PRINCIPLES 61 FUNCTION OF ICE MAKER 62 ICEMAKER TROUBLESHOOTING 65 ICEMAKER CIRCUIT PART 66 CIRCUIT 67 TROUBLE DIAGNOSIS 69 TROUBLE SHOOTING 69 FAULTS 79 COOLING CYCLE HEAVY REPAIR 96 HOW TO DEAL WITH CLAIMS 103 HOW TO DISASSEMBLE AND ASSEMBLE 108 DOOR 108 HANDL...

Страница 3: ...ged Remove dust and foreign materials from the housing and connecting parts 8 Do not fray damage machine heavily bend pull out or twist the power cord 9 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 not touch the icemaker with hands or tools to confirm the operation of geared mot...

Страница 4: ...ANT R134a 185g 61 2 oz LUBRICATING OIL FREOL 15G 320 cc DRIER 1Ø0 83 ITEMS SPECIFICATIONS CAPILLARY TUBE MOLECULAR SIEVE XH 7 FIRST DEFROST 4 5 Hours DEFROST CYCLE 13 15 Hours DEFROSTING DEVICE Heater Sheath Heater L Cord ANTI SWEAT HEATER Dispenser Duct Door Heater Dispenser Heater Home Bar Heater ANTI FREEZING HEATER Water Tank Heater Damper Heater FREEZER LAMP 40W 1 EA REFRIGERATOR LAMP 40W 1 E...

Страница 5: ...RANT R134a 185g 61 2 oz LUBRICATING OIL FREOL 15G 320 cc DRIER 1Ø0 83 1756 69 1 8 898 351 3 948 373 8 600 23 5 8 660 26 711 28 762 30 1133 5 44 5 8 Front View Plane View 2 Ref No GR P207 ITEMS SPECIFICATIONS CAPILLARY TUBE MOLECULAR SIEVE XH 7 FIRST DEFROST 4 5 Hours DEFROST CYCLE 13 15 Hours DEFROSTING DEVICE Heater Sheath Heater L Cord ANTI SWEAT HEATER Dispenser Duct Door Heater Dispenser Heate...

Страница 6: ...REFRIGERANT R134a 185g 61 2 oz LUBRICATING OIL FREOL 15G 320 cc ITEMS SPECIFICATIONS DRIER 1Ø0 83 CAPILLARY TUBE MOLECULAR SIEVE XH 7 FIRST DEFROST 4 5 Hours DEFROST CYCLE 13 15 Hours DEFROSTING DEVICE Heater Sheath Heater L Cord ANTI SWEAT HEATER Dispenser Duct Door Heater Dispenser Heater ANTI FREEZING HEATER Water Tank Heater Damper Heater FREEZER LAMP 40W 1 EA REFRIGERATOR LAMP 40W 1 EA DISPEN...

Страница 7: ... REFRIGERANT R134a 185g 61 2 oz LUBRICATING OIL FREOL 15G 320 cc ITEMS SPECIFICATIONS DRIER 1Ø0 83 CAPILLARY TUBE MOLECULAR SIEVE XH 7 FIRST DEFROST 4 5 Hours DEFROST CYCLE 13 15 Hours DEFROSTING DEVICE Heater Sheath Heater L Cord ANTI SWEAT HEATER Dispenser Duct Door Heater Dispenser Heater ANTI FREEZING HEATER Water Tank Heater Damper Heater FREEZER LAMP 40W 1 EA REFRIGERATOR LAMP 40W 1 EA DISPE...

Страница 8: ...NDENSER Wire Condenser REFRIGERANT R134a 185g 61 2 oz LUBRICATING OIL FREOL 15G 320 cc ITEMS SPECIFICATIONS DRIER 1Ø0 83 CAPILLARY TUBE MOLECULAR SIEVE XH 7 FIRST DEFROST 4 5 Hours DEFROST CYCLE 13 15 Hours DEFROSTING DEVICE Heater Sheath Heater L Cord ANTI SWEAT HEATER Home Bar Heater ANTI FREEZING HEATER Damper Heater FREEZER LAMP 40W 1 EA REFRIGERATOR LAMP 40W 1 EA DISPENSER LAMP 15W 1 EA 1756 ...

Страница 9: ...ONDENSER Wire Condenser REFRIGERANT R134a 185g 61 2 oz LUBRICATING OIL FREOL 15G 320 cc 1756 69 1 8 898 351 3 948 373 8 600 23 5 8 660 26 711 28 762 30 1133 5 44 5 8 Front View Plane View 2 Ref No GR C207 ITEMS SPECIFICATIONS DRIER 1Ø0 83 CAPILLARY TUBE MOLECULAR SIEVE XH 7 FIRST DEFROST 4 5 Hours DEFROST CYCLE 13 15 Hours DEFROSTING DEVICE Heater Sheath Heater L Cord ANTI SWEAT HEATER Home Bar He...

Страница 10: ...R Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a 185g 61 2 oz LUBRICATING OIL FREOL 15G 320 cc ITEMS SPECIFICATIONS DRIER 1Ø0 83 CAPILLARY TUBE MOLECULAR SIEVE XH 7 FIRST DEFROST 4 5 Hours DEFROST CYCLE 13 15 Hours DEFROSTING DEVICE Heater Sheath Heater L Cord ANTI FREEZING HEATER Damper Heater FREEZER LAMP 40W 1 EA REFRIGERATOR LAMP 40W 1 EA DISPENSER LAMP 15W 1 EA 1756 69 1 8 898 351 3...

Страница 11: ...R Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a 185g 61 2 oz LUBRICATING OIL FREOL 15G 320 cc ITEMS SPECIFICATIONS DRIER 1Ø0 83 CAPILLARY TUBE MOLECULAR SIEVE XH 7 FIRST DEFROST 4 5 Hours DEFROST CYCLE 13 15 Hours DEFROSTING DEVICE Heater Sheath Heater L Cord ANTI FREEZING HEATER Damper Heater FREEZER LAMP 40W 1 EA REFRIGERATOR LAMP 40W 1 EA DISPENSER LAMP 15W 1 EA 1756 69 1 8 898 351 3...

Страница 12: ...le Drawer Meat Drawer Door Rack Refreshment Center optional Shelf Door Rack Wine Holder optional Lamp Drawer or Shelf optional Lower Cover Door Rack Drawer Freezer Compartment Refrigerator Compartment Automatic icemaker Door Rack Cover PWB Cover Hinge Home Bar Dairy Product Corner Shelf Steel Tempered Glass 1 Ref No GR P247 GR P207 ...

Страница 13: ... Vegetable Drawer Vegetable Drawer Meat Drawer Door Rack Refreshment Center optional Shelf Door Rack Wine Holder optional Lamp Drawer or Shelf optional Lower Cover Door Rack Drawer Freezer Compartment Refrigerator Compartment Automatic icemaker Door Rack Cover PWB Cover Hinge Home Bar Dairy Product Corner Shelf Steel Tempered Glass ...

Страница 14: ...oor Rack Guide Bottle Shelf Door Rack Wine Holder optional Lamp Drawer or Shelf optional Lower Cover Door Rack Drawer Freezer Compartment Refrigerator Compartment Automatic icemaker Door Rack Conversion Switch Meats Vegetables Cover PWB Cover Hinge Dairy Product Corner Shelf Steel Tempered Glass 3 Ref No GR L247 GR L207 ...

Страница 15: ...Snack Drawer Vegetable Drawer Vegetable Drawer Meat Drawer Door Rack Guide Bottle Shelf Door Rack Wine Holder optional Lamp Drawer or Shelf optional Lower Cover Door Rack Drawer Freezer Compartment Refrigerator Compartment Automatic icemaker Door Rack Cover PWB Cover Hinge Dairy Product Corner Shelf Steel Tempered Glass ...

Страница 16: ...getable Drawer Meat Drawer Door Rack Refreshment Center optional Shelf Door Rack Wine Holder optional Lamp Icemaker Drawer or Shelf optional Lower Cover Door Rack Drawer Freezer Compartment Refrigerator Compartment Door Rack Cover PWB Cover Hinge Home Bar Dairy Product Corner Shelf Steel Tempered Glass 1 Ref No GR C247 GR C207 ...

Страница 17: ...egetable Drawer Vegetable Drawer Meat Drawer Door Rack Shelf Door Rack Wine Holder optional Lamp Drawer or Shelf optional Lower Cover Door Rack Drawer Freezer Compartment Refrigerator Compartment Door Rack Icemaker Cover PWB Cover Hinge Dairy Product Corner Shelf Steel Tempered Glass 3 Ref No GR B247 GR B207 ...

Страница 18: ...ght of freezer door is higher than the refrigerator door Insert a driver into the groove of adjusting screw and rotate driver in arrow direction clockwise until the refrigerator becomes horizontal Insert a driver into the groove of adjusting screw and rotate driver in arrow direction clockwise until the refrigerator becomes horizontal HOW TO INSTALL REFRIGERATOR 18 Adjusting Screw Driver Height Di...

Страница 19: ...ox and fasten it by turning it clockwise by 90 degrees Note Check that the guideline and the fastening indication line are aligned 2 Replacement of water filter While holding the lower part of the filter turn it counterclockwise by 90 degrees and pull it down Note Check that the guideline and the loosening indication line are aligned After installing water filter Reassemble the lamp cover and the ...

Страница 20: ...ray rotates and water comes out from the icemaker water tube 3 The water shall be supplied two or three times into the tray The amount of water supplied for each time is small Put a water container under the ice tray and press test switch 4 When ice tray rotates the water in it will spill Collect the spilled water and throw it into the sink 5 When ice tray has finished rotation water comes out fro...

Страница 21: ... ice cubes are too small increase the water supplying time This happens when too little water is supplied to the tray 4 If the ice cubes stick together decrease the water supplying time This happens when too much water is supplied into the ice tray Caution When adjusting the amount of water supplied adjust step by step Otherwise the water may spill over 3 When adjustment of control switch for the ...

Страница 22: ...EMP REF TEMP REF TEMP DISPENSER LOCK SUPER FRZ LOCK SUPER FRZ Dispenser selection button Temperature adjustment button for refrigerator compartment Temperature adjustment button for freezer compartment Super freezer Lock button Temperature adjustment button for refrigerator compartment Temperature adjustment button for freezer compartment Super freezer Lock button LOCK ON OFF MAX MIN MAX MIN CRUSH...

Страница 23: ...gerator the only Release text is turned on at the right side of lock graphic of LCD with the lock release status 2 If desiring to lock the display status and pressing the lock release button once Release text is turned off at the right side of lock graphic of LCD and Lock text is turned on with lock status 3 The only buzzer sound rings and function is not performed even if pressing display button ...

Страница 24: ... turned on and Arrow graphic is turned on after flickering once 2 Special freezing is cycled in order of Selection Release Turn On Turn Off whenever pressing the selection button 3 Special freezing is released if power failure occurs and then returns to the original status 4 Temperature setting is not changed even if selecting the special freezing 5 The change of temperature setting at the freezin...

Страница 25: ... 1 The M C room fan motor performs ON OFF control by linking with the COMP 2 It controls at the single RPM without varying RPM 3 Failure sensing method is same as freezing fan motor refer to failure diagnosis function table for failure display 2 10 Door opening alarm 1 Buzzer generates alarm sound if doors are not closed even when more than a minute consecutively has passed with doors of freezing ...

Страница 26: ...CTION 26 Function Load Operation Sequence Remark In applying Initial power TEST MODE When temperature of a frost removal sensor becomes more than 45 C 77 F If error occurs during operation initial operation is not done If pressing switch once more in the test mode 2 or temperature of a frost removal sensor is more than 5 C 41 F it immediately returns to the test mode for initial operation Compress...

Страница 27: ...rature for freezing Setting temperaturefor coldstorage No Item Contents of failure Freezer Fan Compressor Stepping motordamper Defrost Heater M C room Fan Product operation status in failure Failure of freezer sensor Failureofrefrigerator sensor1 Failureofrefrigerator sensor2 Failure of frost removal sensor Poor of frost removal FailureofBLDCFAN atfreezingroom FailureofBLDCFAN atmachineroom Failur...

Страница 28: ...atus 3 Function adjustment button is not perceived during performance of test mode but only warning sounds ring 4 In finishing test mode always pull the power cord out and then plug in it again for the normal state 5 If nonconforming contents such as sensor failure are found during performance of test mode release the test mode and display the failure code 6 If you press the test button during a f...

Страница 29: ...urned on if pressing the dispenser press switch after selecting ice cube ice crushed ice or water If detaching the hands it is turned off 6 Selection function of water crushed cube ice 1 This is function to allow selection of water crushed cube ice function depending on user s selection Display and selection is done if pressing the dispenser selection button 2 In the initial Power On cube ice is a...

Страница 30: ...former transferring energy of the primary side of the switching terminal to the secondary side and the feedback part IC3 IC4 transferring it to the primary side Caution Since high voltage DC310V is maintained at the power terminal please take a measure after more than 3 minutes have passed after removing power cords in the abnormal operation of a circuit Voltage of every part is as follows EXPLANA...

Страница 31: ...ircuit The reset circuit is circuit allowing various parts such as RAM inside of MICOM IC1 to initialize and the whole of function to start from the initial status when initial power is input or when power is applied again to MICOM by a spontaneous power failure LOW voltage is applied to the reset terminal of MICOM in the beginning of power supply for a constant time 10ms Reset terminal during gen...

Страница 32: ...are connected to the door open sensing circuit in parallel toward both ends of switch to determine door open at MICOM Since a door switch of the home bar is connected to door switch C D of the cold storage room It senses when any door is opened The fan motor is immediately stop if opening doors of the freezer or refrigerator at the TEST mode and it operates immediately upon their closure 1 GR P247...

Страница 33: ... refrigerator are connected to the door open sensing circuit toward both ends of switch to determine door open at MICOM Since the door switches of the home bar and refrigerator are interconnected the MICOM can tell when either door is opened EXPLANATION FOR MICOM CIRCUIT 33 Measuring part IC7 No 10 No 11 No 12 No 14 No 16 Status ON Within 1 V OFF 12 V Type of Load COMP Frost Removal Heater AC Conv...

Страница 34: ... FOR MICOM CIRCUIT 34 Measuring part Lever S W IC1 Micom No 16 On Press OFF 5V 0 V 60 Hz 5 V Measuring part IC6 13 IC6 12 IC6 11 IC6 10 IC7 12 IC7 10 IC7 16 Status ON Within 1 V OFF 12 V Type of Load GEARED MOTOR SOLENOID CUBE WATER VALVE ICE WATER SOLENOID DISPENSER HOME BAR HEATER SOLENOID PILOT ...

Страница 35: ...d properly If either switch fails the light will not come on EXPLANATION FOR MICOM CIRCUIT 35 Freezing room Cold storage room Cold storage room Freezing room Cold storage room Cold storage room Closing 5 V A B C D S W at both ends are at Off status Opening 5 V A B C D S W at both ends are at On status Measuring part IC1 MICOM No 47 46 Pin Door of Freezing Cold Storage Room ...

Страница 36: ...necessary for frost removal Short or open status of every temperature sensor is as follows EXPLANATION FOR MICOM CIRCUIT 36 SENSOR CHECK POINT NORMAL 30 C 50 C IN SHORT IN OPEN Freezing sensor POINT A Voltage Frost removal sensor POINT B Voltage Cold storage sensor 1 POINT C Voltage 0 5 V 4 5 V 0 V 5 V Cold storage sensor 2 POINT D Voltage Icemaking sensor POINT E Voltage Room temperature sensor P...

Страница 37: ... necessary for frost removal Short or open status of every temperature sensor is as follows EXPLANATION FOR MICOM CIRCUIT 37 A C E B D Sensor for freezing room Sensor for frost removal Sensor for cold storage room Sensor for cold storage room SENSOR CHECK POINT NORMAL 30 C 50 C IN SHORT IN OPEN Freezing sensor POINT A Voltage Frost removal sensor POINT B Voltage Cold storage sensor 1 POINT C Volta...

Страница 38: ...GR P247 L247 P207 L207 2 GR C247 B247 C207 B207 The above circuits are used for designating separation by model as option and notifying MICOM Designation of option by model and the application standards are as follows u These circuits are accurately pre adjusted in shipment from factory and so you must not additionally add or remove option EXPLANATION FOR MICOM CIRCUIT 38 36 R21 4 7K Separation Co...

Страница 39: ...OM PIN 33 34 and 35 as shown in wave form of the following part These signals are output to the output terminal No 10 11 14 15 via the input terminal No 3 6 8 of the IC10 TA7774F as IC for motor driving Output signals allow motor coils wound on each phase of stator to form rotation magnetic field and the motor to rotate Inputting as below figure to the input terminal INA INB as IC TA7774AF for mot...

Страница 40: ...or and applies DC voltage up to 7 5V 16V to motor 3 This circuit performs function not to drive the fan motor further by cutting off power applied to the fan motor in the lock of fan motor by sensing the operation RPM of the fan motor 1 GR P247 L247 P207 L207 EXPLANATION FOR MICOM CIRCUIT 40 a d part b part e part c f part Motor OFF 5V 2V or less 2V or less 0 V Motor ON 2 3V 12 14V 8 16V 0 V b e c...

Страница 41: ...2 GR C247 B247 C207 B207 EXPLANATION FOR MICOM CIRCUIT 41 b e c f a d Speed Speed ...

Страница 42: ... 42 Temperature compensation at refrigerator Temperature compensation at freezer Temperature compensation at refrigerator Temperature compensation at freezer Freezer Refrigerator Resistance value Temperature Resistance value Temperature Remarks RCF1 compensation RCR1 compensation 180 kΩ 5 C 9 F 180 kΩ 2 5 C 4 5 F Warmer 56 kΩ 4 C 7 2 F 56 kΩ 2 0 C 3 6 F 33 kΩ 3 C 5 4 F 33 kΩ 1 5 C 2 7 F 18 kΩ 2 C ...

Страница 43: ... Down Down Down change Up Up Up Up Up Up Up 2 C 1 5 C 1 C 0 5 No 0 5 C 1 C 1 5 C 2 C 2 5 C 3 C 8 2 kΩ 3 6 F 2 7 F 1 8 F 0 9 F 0 9 F 1 8 F 2 7 F 3 6 F 4 5 F 5 4 F Refrigerator Down Down Drop Down change Up Up Up Up Up Up RCR1 2 5 C 2 C 1 5 C 1 C 0 5 C No 0 5 C 1 C 1 5 C 2 C 2 5 C 10 kΩ 4 5 F 3 6 F 2 7 F 1 8 F 0 9 F 0 9 F 1 8 F 2 7 F 3 6 F 4 5 F Down Down Down Down Down change Up Up Up Up Up 3 C 2 5...

Страница 44: ...sation for weak cold for over cold Temperature compensation value Remarks JCR3 JCR4 JCR1 JCR2 at cold storage room 0 C In shipment from factory CUT 1 C 1 8 F CUT 1 C 1 8 F CUT 1 C 1 8 F CUT 1 C 1 8 F CUT CUT 2 C 3 6 F CUT CUT 2 C 3 6 F CUT CUT 0 C 0 F CUT CUT 0 C 0 F CUT CUT 0 C 0 F CUT CUT 0 C 0 F CUT CUT CUT 1 C 1 8 F CUT CUT CUT 1 C 1 8 F CUT CUT CUT CUT 0 C 0 F Temperature compensation in CUT ...

Страница 45: ...red Poor communication occurs if a continuous information exchange fail to continue for more than 2 minutes between main MICOM of main PCB and LCD dedicated MICOM for LCD control of display PCB 1 GR P247 L247 P207 L207 EXPLANATION FOR MICOM CIRCUIT 45 GND 12Vdc Transmission Transmission Reception Reception CRUSHED CUBED WATER FRZ TEMP REF TEMP DISPENSER LOCK SUPER FRZ OFF MAX MIN MAX MIN TEMP TEMP...

Страница 46: ...er 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 part EXPLANATION FOR MICOM CIRCUIT 46 Measuring Temperature C Freezing Sensor Cold storage sensor 1 2 Frost removal sensor Outside sensor 20 C 22 3 kΩ 77 kΩ 15 C 16 9 kΩ 60 kΩ 15 C 13 0 kΩ 47 3 kΩ 5 C 10 1 kΩ 38 ...

Страница 47: ...3 PWB parts diagram and list 3 1 PWB Assembly main part diagram 1 GR P247 L247 P207 L207 EXPLANATION FOR MICOM CIRCUIT 47 ...

Страница 48: ...2 GR C247 B247 C207 B207 EXPLANATION FOR MICOM CIRCUIT 48 ...

Страница 49: ...3 2 Parts list 1 GR P247 L247 P207 L207 EXPLANATION FOR MICOM CIRCUIT 49 ...

Страница 50: ...EXPLANATION FOR MICOM CIRCUIT 50 WATER SUPPLY S W ...

Страница 51: ...2 GR C247 B247 C207 B207 EXPLANATION FOR MICOM CIRCUIT 51 ...

Страница 52: ...EXPLANATION FOR MICOM CIRCUIT 52 WATER SUPPLY S W ...

Страница 53: ...3 3 DISPLAY ASSEMBLY part diagram 1 GR P247 L247 P207 L207 EXPLANATION FOR MICOM CIRCUIT 53 ...

Страница 54: ...2 GR C247 B247 C207 B207 EXPLANATION FOR MICOM CIRCUIT 54 DOUBLE SIDE TAPE SPREAD SHEET ...

Страница 55: ...3 4 DISPLAY circuit diagram 1 GR P247 L247 P207 L207 EXPLANATION FOR MICOM CIRCUIT 55 Parts without mark means SMD parts ...

Страница 56: ...2 GR C247 B247 C207 B207 EXPLANATION FOR MICOM CIRCUIT 56 Reception Transmission Parts without mark means SMD parts ...

Страница 57: ...4 PWB circuit diagram PWB circuit diagram may vary a little bit depending on actual condition 1 GR P247 L247 P207 L207 EXPLANATION FOR MICOM CIRCUIT 57 PWBASSEMBLY MAIN ...

Страница 58: ...EXPLANATION FOR MICOM CIRCUIT 58 PCB ASSEMBLY DISPLAY ...

Страница 59: ...2 GR C247 B247 C207 B207 EXPLANATION FOR MICOM CIRCUIT 59 PWBASSEMBLY MAIN ...

Страница 60: ...EXPLANATION FOR MICOM CIRCUIT 60 PCB ASSEMBLY DISPLAY ...

Страница 61: ... cube ice can be dispensed if there is ice in the ice bin 7 When dispenser water bushing button is pressed water valve opens and water is supplied if water valve is normally installed on the right side of the compressor area 8 Ice and water are not available when freezer door is open ICEMAKERANDDISPENSEROPERATIONPRINCIPLEANDREPAIRMETHOD 61 Level Icemaker Cube Mould for Initial Control after power ...

Страница 62: ...y water shall be supplied for the previous setting time But it will supply for the amended time from the next supply 4 When water supply signal is applied to water and ice valves at the same time during water supply water shall be supplied to water valve If water supply signal is applied to ice valve during water supply water shall be supplied to both water and ice valves 2 3 Icemaking Control Fun...

Страница 63: ...when ice ejection motor rotates in normal direction If there is no change in Hall IC signals within 1 minute after ice ejection motor operates ice ejection motor stops as ice ejection motor or hall IC is out of order 5 If ice ejection motor or Hall IC is abnormal ice ejection motor rotates in normal direction to exercise initial operation It resets the icemaker if ice ejection motor or Hall IC is ...

Страница 64: ...en test function performs normally the buzzer sounds and water supply shall carry out Check it for repair if buzzer does not sound 4 When water supply is completed the cycle operates normally as follows Icemaking Ice ejection Returning to horizontal conditions Water supply 5 Remove ice from the icemaker cube mould and press test switch when icemaker cube mould is full of ice as ice ejection and wa...

Страница 65: ...heck Failed Icemaker Unit Is the resistance of both ends 9 10 of ice ejection motor of CON9 between 18 and 22Ω Is ice ejection motor drive circuit IC11 and peripheral circuits normal Defects between Hall IC and Board Pin No 42 of IC1 Confirm ice ejection and level return when pressing test switch Replace Icemaker Unit Replace Main PWB Are ice ejection and level return normal when test switch is pr...

Страница 66: ...h installed at the automatic icemaker itself for more than 0 5 second 2 The test switch operates in the horizontal status and test function is not input in the water supply operation Ice removal control and water supply control is not performed if full ice is arrived during the operation of test function 3 If pressing the test switch for 0 5 second or more in the horizontal status ice removal oper...

Страница 67: ...CIRCUIT 67 ...

Страница 68: ...CIRCUIT 68 ...

Страница 69: ...l Bad connection between plug and adapter faulty plug The distance between pins Pin outer diameter No power on power cord O L P is off No electric power on compressor Faulty compressor Faulty PTC Disconnectedcopperwire Internalelectricalshort Faultyterminalcontact Disconnected Capacity of O L P is small CharacteristicsofO L Pisbad Badconnection Poweris disconnected InnerNi Crwireblowsout Bad inter...

Страница 70: ...eaveitintheair Moisturepenetration intotherefrigerationoil Capsaremissed Airblowing Duringtransportation During work Notperformed Performed Tooshorttime Lowairpressure Lessdryair AirBlowing Leaveitintheair Capsaremissed Shortpipeinsert Pipe gaps Toomuchsolder Toolarge Damagedpipes Notdriedinthecompressor Elapsedmorethan6monthsafterdrying Capsaremissed Nopressurewhenitisopen Duringresttime Afterwor...

Страница 71: ...s not disconnected Injectthroughthe hole Seal with drain P Ulumpinput Screw input Otherforeignmaterials input Parts disconnected Wire is cut Heatingwire Contactpoint betweenheating andelectricwire Dentbyfinevaporator Poorterminalcontacts Wire is cut Leadwire Heatingwire Contactpoint betweenheatingand electricwire Heatingwireiscorroded Waterpenetration Badterminalconnection Check visually Check ter...

Страница 72: ...fanmotor Badinsulationofcasedoor SheathHeater rated Heaterplate rated Heatercord L rated Heaterplate Heatercord L Gap Badattachment Contraction Badadhesion Weakbindingforceathinge Fanmotor Door switch Selflocked Wireiscut Badterminalcontact Contact distance Buttonpressure Meltedcontact Contact Poordoor attachment Door liner dimension Contractioninner liner Misalignment Badterminal connection P U l...

Страница 73: ...is constrained Insufficient motorRPM Faultyfan Shorud Bent Iceandforeignmaterialsonrotatingparts Fanshroudcontact Clearance Dampingevaporatorcontact Accumulatedresidualfrost Fanmisuse Badshape Looseconnection Nottightlyconnected Insertdepth Ratingmisuse Smallcapacity Lowvaltage Malfunction of charging cylinder Wrongsettingofrefrigerant Insufficientcompressor Faultycompressor Fanoverload Fanmisuse ...

Страница 74: ...aterials P U dump liquid Faulty contact Faulty temperature characteristics External air inflow Bushing installed incorrectly Door opens but not closes Gap around gasket Contraction distortion loose door twisted corner not fully inserted Food vapor Storing hot food Unsealed food Door opens but not closes Gasket gap Cool air leak and transmitted Highambienttemperature Space is secluded Differentrati...

Страница 75: ...y Position of drain 1 Compressor compartment operating sounds Compressor sound Sound from machine itself inserted Sound from vibration Restrainer Bushing Too hard seat Distorted Aged Burnt Stopper Bad Stopper Not fit assembly inner diameter of stopper Tilted Not Compressor base not connected Bad welding compressor stand fallen Foreign materials in the compressor compartment OLP sound Chattering so...

Страница 76: ...ownfault Coregap Bad connection Correct screw connection Bad assembly Distortion Foreignmaterialsinside Badconnection Partlydamaged Notconnected Badpipecaulking Normaloperatingsound Vibrationsound Agedbushingseat Badtorqueforassemblingmotor bracket Fanguidecontact Shroudburrcontact Dampingevaporatorcontact Residualfrostcontact Unbalance Iceonthefan Airintake oppositetomotor bushingassembly Support...

Страница 77: ...Travlel distance Bad connection Bad terminal contact P U liquid leak 1 Lead wire is damaged Wire damage when assembling PTC Cover Outlet burr in the bottom plate Pressed by cord heater lead wire evaporator pipe 2 Exposed terminal Compressor Compartment terminal Touching other components Freezer compartment terminal Touching evaporator pipe 3 Faulty parts Transformer Coil contacts cover Welded term...

Страница 78: ...betweendoorlinerandinnerliner Refrigerator compartmentis openedwhenfreezer compartmentis closed faultystopper High Faultydampercontrol Buttonissetatweak Doorisopen interferenceby food No deodorizer Poorcapacity Seal condition Storespecialodorousfood Longtermstorage Odorsfromchemicalprocucts Biggerdoorfoam Hinge Pintilted Poorflatness Nowasher Nogrease Stopperwornout Badfreezercompartmentdoor assem...

Страница 79: ...d and products Replace with rated fuse Electricity leakage Check the resistance of power cord If fuse blowns out High voltage with testerf if it is 0Ω it is shorted frequently confirm Short circuit of components the cause and prevent tracking due to moisture and dust penetration Problems Causes Checks Measures Remarks Compressor Faulty PTC Check the resistance If resistance is infinite replace it ...

Страница 80: ...button faulty operation Confirm icing causes and repair switch operation Press button to check Replace door switch Faulty button pressure and contact Press button to check operation Door cannot press door switch Door sag fix door button Check visually Door liner bent replace door or attach sheets Bad radiation conditions in Check the clearance between the Keep clearance between The fan may be comp...

Страница 81: ... pressure side 3 Check silver soldered parts Cu Fe Fe Fe 4 Check bending area of wire condenser pipe in compressor compartment cracks can happen during bending 5 Check other parts compressor compartment and evaporators in freezer compartment Shortage of refrigerant Check frost formation on the surface Find out the leaking area repair Drier must be replaced of evaporator in the freezer evacuate and...

Страница 82: ...e weld If it is warm it s OK joints might be clogged If it is not condenser outlet weld Disconnect with torch remove the joints might be colgged causes evacuate and recharge seal refrigerant Leak at loop pipe weld joint Check sequence Replace the compressor weld Drier must be replaced discharge in compressor 1 Manually check whether evacuate and recharge refrigerant condenser is warm It is not war...

Страница 83: ...impurities by inserting are clogged of ice insert the copper line copper wire Turn off more than 1 Impurities through the hole to check 3hours and pour in hot water if 2 Ice 2 Put hot water into the drain frost is severe check drains outside 2 Put in hot water to melt down frost 3 Check the water outlet 4 Push the heater plate to sucking duct manually and assemble the disconnected parts Gap betwee...

Страница 84: ...k by inserting soft copper 3 Reassemble the heater plate wire into the duct soft and thin copper not to impair heating wire Bad cool air inflow and discharge 1 Turn on power open or close the 1 Check the faulty connector of and bad defrosting due to faulty door check that motor fan housing and reassemble wrongly contact and insertion bad connector operates If it operates motor fan assembled parts ...

Страница 85: ...stomers are not familiar with this machine Door opens High temperature high moisture and high load Check the food is stored properly check discharge and intake port are clogged Check icing on the surface of baffle and cool air path pipe after dissembling the container box Check icing at intake ports of freezer and refrigerator compartment Check gasket attached conditions Check door assembly condit...

Страница 86: ...artment door Check gasket attachment Correct the gasket attachement Replace when it can not Icing in the Faulty gasket conditions conditions and replace it be repaired shute Faulty assembly Check door assembly conditions Door assembly and replacement 3 Over freezing in the freezer Refrigerator operates pull down Replace defective parts compartment Check if it is operated Faulty MICOM intermittentl...

Страница 87: ...epth and blade damage 3 2 Check the interference with structures 3 3 Check fan motor 3 4 Check fan motor bushing insertion and aging conditions 4 1 Same as fan confirmation in the refrigerator 4 2 Check drip tray leg insertion 4 3 Check the screw fastening conditions at condenser and drip tray 1 Maintain horizontal level 2 Replace bushing and seat if they are sagged and aged 3 Tuch the piping at v...

Страница 88: ...ion with bushing 4 Moving wheel vibration 2 2 Check capillary tube touches and restrainer if it is severe 5 Other structure and parts cover back especially compressor and pipe vibration 3 1 Check compressor stopper 4 Replace compressor stopper if it vibration vibtates severely 4 1 Check vibration of front and rear moving wheels 5 1 Touch other structures and parts Irregular sound 1 It is caused by...

Страница 89: ...ain the principles of freezing cycles Water boiling or It happens when refrigerant passes Check the sound when compressor is Explain the principles of freezing cycles flowing sound orifice in accumulator internal pipes by turned on and refrigerant flowing phenomenon by the pressure difference between Check the sound when compressor is internal pressure difference condenser and evaporator turned of...

Страница 90: ...ead of vinyl wraps Chedk food cleanliness Clean the refrigerator and set button at strong Plastic Odor Odors of mixed food and plastic Check wet food is wrapped with Clean the refrigerator odors plastic bowl and bag Persuade customers not to use It happens in the new refrigerator plastic bag or wraps with wet food or odorous foods Odor from the Odor from the old deodorizer Check the deodorizer odo...

Страница 91: ...ctor connection Check resistance of PCB transformer input and output terminals with a tester If resistance is infinity trans winding is cut Check voltage at input output terminals Check fuse in PCB electric terminal with a tester Check if STR No 2 and 3 pins are cut when power is off Check Lead Wire terminals connecting Main PCB and display PCB with a tester Check if all LCD are on when Main PCB T...

Страница 92: ...tics table of sensor in circuit Freezer sensor is Confirm the color of sensor in Repair main PCB explanation substituted for other circuits main PCB sensor sensor housing sensor housing Defective freezer fan Fan motor lead wire Check fan motor lead wire Reconnect lead motor is cut with a tester wire Defective door switch Measure the voltage between Replace door Refer to load freezer refrigerator P...

Страница 93: ...it explanation Foreign materials in Step Check Step Motor damper Remove foreign Motor damper baffles baffle visually materials Ice formation on Check if Step Motor damper Replace Step Motor Step Motor damper Heater wire is cut with a damper or refrigerator baffles tester control Box Assembly Defective refrigerator Defective refrigerator Check the resistance of Replace refrigerator Refer to sensor ...

Страница 94: ...explanation Defective Buzzer Defective connecting lead wire from Check lead wire related to door Repair lead wire buzzer continuously main PCB to door switch switch with a tester rings or door Defective door switch parts Refer to door switch in parts repair Replace door switch opening alarm guide does not work Defective Buzzer does Key input wire is cut or bad connector Check input wire with a tes...

Страница 95: ...e associated with lever Repair lead wire dispenser are not Main PCB to lever switch switch with a tester dispensed Defective lever switch parts Refer to door switch in parts repair guide Replace lever switch Defective photo coupler IC parts Check voltage change at photo coupler Replace photo output terminals with lever switch coupler IC or PCB pressed It is OK if voltage change is between 0V 5V De...

Страница 96: ... Torr Below 0 03 ref Note Only applicable to the model degree equipped with reverse flow protect plate Vacuum EA High and low Vaccum efficiency can be improved by Pressure sides are operating compressor during evacuation evacuated at the same time for models above 200 L Vacuum EA Use R134a To protect The bushing pipes for R12 refrigerant shall piping exclusive mixing of be melted when they are use...

Страница 97: ...e while compressor operates electronic scales punching Weld carefully after pinching off the inlet pipe off flier gas welding machine Check leak at weld joints Electronic Leak Detector Minute leak Use electronic leak detector Driver Ruler Big leak Check visually Note Do not use soapy water for check Check cooling capacity Check radiator manually to see if warm Check hot line pipe manually to see i...

Страница 98: ... oil will leak 3 Replacement of drier 1 Be sure to replace drier with R134a only when repairing pipes and injecting refrigerant 4 Nitrogen blowing 1 Weld under nitrogen atmosphere in order to prevent oxidation inside a pipe welding Nitrogen pressure 0 1 0 2 kg cm2 5 Others 1 Nitrogen or refrigerant R134a only should be used when cleaning inside of cycle pipes inside and sealing 2 Check leakage wit...

Страница 99: ...not necessary because it does not produce oxidized scales inside pipe because of its short welding time 3 Replacement of drier Inserting a capillary tube Measure distance with a ruler and put a mark 12 3 0 on the capillary tube Insert tube to the mark and weld it KEYPOINTING Observe the sequence for removal of refrigerant If not compressor oil may leak KEYPOINTING Welding without nitrogen blowing ...

Страница 100: ...measure the weight Calculate the weight of refrigerant charged into the charging canister by subtracting the weight of an evacuated charging canister KEYPOINTING If power is applied during vacuum degassing vacuum degassing shall be more effective Operate compressor while charging refrigerant It is easier and more certain to do like this KEYPOINTING Be sure to charge the refrigerant at around 25 C ...

Страница 101: ...y control the size of Joint Drain Pipe Compressor Condenser Drier Evaporator Charging Canister Bushing 1 Observe the safety precautions for gas handling 2 Use JIG or wet towel in order to prevent electric wires from burning during welding In order to prevent insulation break and accident 3 The inner case will melt and the insulation will burn 4 The copper piping will oxidize 5 Do not allow aluminu...

Страница 102: ...ASSEMBLY HOT LINE Freezer PIPE ASSEMBLY HOT LINE Refrigerator PIPE ASSEMBLY JOINT CONDENSER ASSEMBLY WIRE PIPE ASSEMBLY SUCTION DRIER ASSEMBLY CAPI TUBE Copper Brazer Copper Brazer Silver Brazer Copper Brazer Copper Brazer Copper Brazer Coppper Brazer Silver Brazer Copper Brazer ...

Страница 103: ...ernal evaporator in the refrigerator compartment expand and contract as the temperature changes during the refrigerator operation This sound also happens during defrosting twice a day when the ice on the evaporator melts Clunk sound Explain that it comes from the compressor when the refrigerator starts When the refrigerator operates the piston and motor in the compressor rotate at 3600RPM This sou...

Страница 104: ... water flowing also makes sound When water Noise from motor sounds Hiss freezes clicking sounds are heard When ice is being ejected sounds like Hiss produced by a motor to rotate an ice tray and ice dropping and hitting ice bin sounds are also heard Noise when supplying water Explain the principles of water supplied to dispenser When the water supply button in the dispenser is pressed the water su...

Страница 105: ...ream The freezing point of ice cream is below 15 C 5 F Therefore ice cream may melt if it is stored in the door rack Store ice cream in a cold place or set the temperature control button of a freezer at strong position Refrigeration is too strong Check the position of temperature control button Check if refrigeration is strong in whole area of the refrigerator or partly near the outlet of the cool...

Страница 106: ...utton at strong Frost in the freezer compartment Explain the basic principles of frost formation The main causes for frosting Door was left open Air penetration through the gasket Too frequent door opening parties etc Hot foods are stored before they are cooled down The temperature of freezer is 19 C 2 2 F if temperature is set at MID If hot air comes into the refrigerator fine frost forms as cold...

Страница 107: ...ner or in the wrap When is the power connected When should the power be connected You can connect the power right after the installation But if the refrigerator was laid flat during transportation for a long period of time and the refrigerant and compressor oils are mixed up then this will affect badly the performance of a refrigerator Be sure to connect the power 2 3 hours after refrigerator is i...

Страница 108: ...cket hinge pin is deformed during assembling freezer and refrigerator doors attach two screws Tap Tite Screw M6 Hinge L fixing screw in the hole of upper hinge 3 Disconnect upper hinge from a hinge supporter by grasping the front part of upper hinge and lifting up Hinge Assembly U in arrow direction A and pull forward in arrow B direction Be careful as the door may be fallen down 4 Lift up the fre...

Страница 109: ...sembly of shroud F U Hold upper part and pull forward 8 Check foam PU sticking conditions around a shroud F U and F L during assembling If damaged torn or badly sticked assemble with a new one after sealing well 4 ICEMAKER ASSEMBLY 1 Dispenser Model 1 How to disassemble 1 Remove ice bin from the freezer compartment 2 Loosen two screws on the upper part of icemaker bracket 3 Disconnect icemaker Bra...

Страница 110: ...y housing 4 Loosen four screws with a phillips screwdriver and pull the funnel Assembly to disconnect 5 Duct cap Assembly is disconnected if hold lever connecting screw is loosened with a phillips screwdriver 6 For assembling a duct cap Assembly insert one end of a spring into the right hole of dispenser lever and insert the other end into the right hole in upper part of dispenser Then assemble a ...

Страница 111: ...ISPLAY 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 ASSEMBLY 15 SPRING 16 LEVER HOLDER 17 DUCT CAP 19 DISPENSER LEVER 20 BUSHING CAP 21 BUTTON ASSEMBLY 22 BUTTON 23 BUTTON HOLDER 24 DRAIN GRILLE 17 Cap Assembly Duct Detailed Drawings ...

Страница 112: ...ompartment door with a phillips screwdriver And loosen 4 screws and two screws Pull H Bar door Assembly forward to disassemble 3 Loosen two screws fixed on H Bar door Assembly and two screws with a phillips driver to disassemble arm Assembly 4 Assemble parts by performing the disassembly in reverse order Note Assemble carefully parts until they are attached firmly when assembling them Adjust exter...

Страница 113: ...FREEZER DOOR PART GR P247 GR P207 GR L247 GR L207 EXPLODED VIEW 113 205A 210C 210B 210A 210C 206A 205K 201A 203A 206E 206F 206C 205C 205F 205H 205E 205J 205G 202A 200A ...

Страница 114: ...FREEZER DOOR PART GR C247 GR C207 GR B247 GR B207 EXPLODED VIEW 114 205A 210B 210B 210B 210C 210C 206A 201A 203A 206E 206F 206C 205C 205F 205H 205E 205J 205G 207A 200A 202A ...

Страница 115: ...ART Optional part EXPLODED VIEW 115 240C 240C 240B 264C 264A 264B 240A 147A 243A 243A 241B 241A 147B 147C 206J 205A 261A 265A 267A 263A 266B 260A 263B 266B 265A 267A 266C 266C 233A 206D 262A 206H 206B 205C 234A 266A 264D 402B 205G 205J 205E 205H 205F 232A 230A ...

Страница 116: ...247 GR L207 GR B247 GR B207 REFRIGERATOR DOOR PART Optional part EXPLODED VIEW 116 232A 240C 240C 240A 240A 147A 243A 243A 241B 241A 147B 147C 233A 206D 231A 205D 206G 206B 205A 205G 205J 205E 205H 205F 234A 200A ...

Страница 117: ...tional part EXPLODED VIEW 117 270A 271B 271A 320A 302A 103A 400A 312A 402A 135A 401A 152A 128C 128D 125A 105B 272A 130A 120B 120B 120B 135B 408A 320A 408B 101A 137A 136D 136C 136A 136B 403A 131D 131C 131E 131B 131A 132A 120A ...

Страница 118: ...LODED VIEW 118 270B 271B 271C 402A 145A 145A 103A 152A 116A 410A 115B 401A 150A 162A 162B 177A 272B 151C 155A 146A 626B 626A 626C 624C 624A 177B 115A 101B 151D 151E 171B 141C 171A 141A 170A 166B 166A 160D 165A 161A 160D 160A 140C 140A 140C 140A ...

Страница 119: ...EXPLODED VIEW 119 404B 614A 606A 610A 621B 612A 612B 612C 615A 616B 616C 616A 613A 616E 623A 623A or 623B 618A 622A 616D 404A 620A 620B 616A 611A 625A 616G 619A 601A 605A 602A 607A 600A 603A 510B 603B 604A 616F 627A 617A 624B 619A ...

Страница 120: ...art EXPLODED VIEW 120 300A 310B 307A 304A 306A 310A 317B 317A 305C 305B 313A 301A 306C 306D 307A 104A 305C 305B 303C 303B 303D 303A 305A 407B 500A 502B 502A 411A 306C 105C 105D 105E 505A 105F 407A 308A 308C 308B 309B 403B 309C 309A ...

Страница 121: ...DISPENSER PART EXPLODED VIEW 121 278A 278E 402C 278D 405A 275A 276A 275C 401C 275D 275B 281A 276B 280C 280A 207A 277A 280B 278B 278C 501A 279A 207B ...

Страница 122: ...P No 3828JD8471K SEP 2002 Printed in Korea ...

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