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3. Door opening sensing circuit

1) GR-P247, L247, P207, L207

2) GR-C247, B247, C207, B207, 197

✽

Since door switch sensing switch (A), (B) are a separate switch even if the door switch of the freezing room normally
operates, they may fail to sense door opening in the failure of switch at both ends of (A) and (B) or in failure of the L/wire.

✽

Lamp does at the cold storage room not turn on if the door switch of the cold storage room fails to sense the door open
switch (C), (D) or the home bar switch.

EXPLATION FOR MICOM CIRCUIT

- 38 -

(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

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Содержание Privilege gr-p207

Страница 1: ... OF THIS BOOK BEFORE CHECKING OR OPERATING THE REFRIGERATOR Ref No GR P207 GR P247 REFRIGERATOR SERVICE MANUAL Ref No GR L207ERA GR L207TRA GR L247TRA Ref No GR C207 GR C247 Ref No GR B207 GR B247 MODEL COLOR SUPER WHITE NOBLE INOX http biz lgservice com ...

Страница 2: ...VER COLD AT FREEZING ROOM 47 PWB PARTS DRAWING AND LIST 50 PWB CIRCUIT DIAGRAM 60 ICE MAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD 64 WORKING PRINCIPLES 64 FUNCTION OF ICE MAKER 65 ICE MAKER TROUBLESHOOTING 68 ICE MAKER CIRCUIT PART 69 CIRCUIT 70 TROUBLE DIAGNOSIS 72 TROUBLE SHOOTING 72 FAULTS 82 COOLING CYCLE HEAVY REPAIR 99 HOW TO DEAL WITH CLAIMS 106 HOW TO DISASSEMBLE AND ASSEMBLE...

Страница 3: ...em 7 Make sure the hook is correctly engaged 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 the evidence of moisture intrusion in the electrical components Replace the parts or mask it with insulation tapes if moisture intrusion was confirmed 10 Do not touch the icemaker with hands or...

Страница 4: ...EFRIGERANT R134a 185g LUBRICATING OIL FREOL 15G 320 cc DRIER 1Ø0 83 CAPILLARY TUBE MOLECULAR SIEVE XH 7 ITEMS SPECIFICATIONS 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 EA...

Страница 5: ...EFRIGERANT R134a 185g LUBRICATING OIL FREOL 15G 320 cc DRIER 1Ø0 83 CAPILLARY TUBE MOLECULAR SIEVE XH 7 1750 1720 1750 600 948 890 660 711 755 1133 5 Front View Plane View 2 Ref No GR P207 ITEMS SPECIFICATIONS 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 HE...

Страница 6: ...denser REFRIGERANT R134a 185g 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 ANTI FREEZING HEATER Water Tank Heater Damper Heater FREEZER LAMP 40W 1 EA REFRIGERATOR LAMP 40W 1 EA DISPENS...

Страница 7: ...denser REFRIGERANT R134a 185g 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 ANTI FREEZING HEATER Water Tank Heater Damper Heater FREEZER LAMP 40W 1 EA REFRIGERATOR LAMP 40W 1 EA DISPENS...

Страница 8: ...Type CONDENSER Wire Condenser REFRIGERANT R134a 185g LUBRICATING OIL FREOL 15G 320 cc DRIER 1Ø0 83 CAPILLARY TUBE MOLECULAR SIEVE XH 7 ITEMS SPECIFICATIONS 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 1750 1...

Страница 9: ...Type CONDENSER Wire Condenser REFRIGERANT R134a 185g LUBRICATING OIL FREOL 15G 320 cc DRIER 1Ø0 83 CAPILLARY TUBE MOLECULAR SIEVE XH 7 1750 1720 1750 600 948 890 660 711 755 1133 5 Front View Plane View 2 Ref No GR C207 ITEMS SPECIFICATIONS 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 H...

Страница 10: ...PORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a 185g 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 FREEZING HEATER Damper Heater FREEZER LAMP 40W 1 EA REFRIGERATOR LAMP 40W 1 EA DISPENSER LAMP 15W 1 EA 1750 1720 1750 685 948 ...

Страница 11: ...PORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a 185g 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 FREEZING HEATER Damper Heater FREEZER LAMP 40W 1 EA REFRIGERATOR LAMP 40W 1 EA DISPENSER LAMP 15W 1 EA 1750 1720 1750 600 948 ...

Страница 12: ...dity Switch Lamp Shelf Egg Box Snack drawer Vegetable drawer Vegetable drawer Meat drawer Door rack Refreshment center optional Shelf Door rack Wine holder optional Lamp Drawer or Shelf optional Lower Cover Milk product corner Door rack Drawer Freezer Compartment Refrigerator Compartment Automatic ice maker Door rack Shelf Steel T Glass 1 Ref No GR P247 GR P207 ...

Страница 13: ...e drawer Vegetable drawer Meat drawer Door rack Refreshment center optional Shelf Door rack Wine holder optional Lamp Shelf Steel T Glass Drawer or Shelf optional Lower Cover Milk product corner Door rack Drawer Freezer Compartment Refrigerator Compartment Automatic ice maker Door rack Cover Hinge Home Bar Frame Display Dispenser Lamp Ice Water Dispenser Button ...

Страница 14: ...Guide bottle Shelf Door rack Wine holder optional Lamp Shelf Steel T Glass Drawer or Shelf optional Lower Cover Milk product corner Door rack Drawer Freezer Compartment Refrigerator Compartment Automatic ice maker Door rack Conversion Switch Meats Vegetables Cover Hinge Frame Display Dispenser Lamp Ice Water Dispenser Button 3 Ref No GR L247 GR L207 ...

Страница 15: ...wer Vegetable drawer Vegetable drawer Meat drawer Door rack Guide bottle Shelf Door rack Wine holder optional Lamp Shelf Steel T Glass Drawer or Shelf optional Lower Cover Milk product corner Door rack Drawer Freezer Compartment Refrigerator Compartment Automatic ice maker Door rack Cover Hinge Frame Display Dispenser Lamp Ice Water Dispenser Button ...

Страница 16: ...r Vegetable drawer Meat drawer Door rack Refreshment center optional Shelf Door rack Wine holder optional Lamp Ice Bank Assy Shelf Steel T Glass Drawer or Shelf optional Lower Cover Milk product corner Door rack Drawer Freezer Compartment Refrigerator Compartment Door rack Cover Hinge Home Bar Frame Display 1 Ref No GR C247 GR C207 ...

Страница 17: ...wer Vegetable drawer Vegetable drawer Meat drawer Door rack Shelf Door rack Wine holder optional Lamp Shelf Steel T Glass Drawer or Shelf optional Lower Cover Milk product corner Door rack Drawer Freezer Compartment Refrigerator Compartment Door rack Ice Bank Assy Cover Hinge Frame Display 3 Ref No GR B247 GR B207 ...

Страница 18: ...he height of freezer door is higher than that of refrigerator compartment 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...

Страница 19: ...firm the following installation parts HOW TO INSTALL REFRIGERATOR 19 Class Shape and Spec Nomenclature P No Remarks Valve Feed 5221JA3001A Common Use Connector MECH Pipe 4932JA3003A Conversion Connector 3 4 6631JA3004A No Holes Balance Conector 3 4 6631JA3004B Packing ø24x3t 3920JA3001B Connector MECH Pipe 4932JA3003B Conversion Connector W25 6631JA3004C No Holes Balance Conectoor W25 6631JA3004D ...

Страница 20: ...nser button for 2 3 minutes and confirm that the water comes out Caution Feed pipe should be connected to cold water line If it is connected to hot water line trouble may occur Please check rubber packing when connecting feed pipe 2 Check leakage at connecting part then arrange water tube and locate the refrigerator at its regular place if there is no leaking HOW TO INSTALL REFRIGERATOR 20 Single ...

Страница 21: ...se standard feed tube to prevent leaking Outternal Filter 1 Filter Fixation 1 Connect feed tube to the filter outlet and water valve connecting tube 2 Fix the filter at proper place around the sink where it is easy to replace the filter and to receive the cleaning water Please consider the length of tube shall be less than 12m when locating filter 3 When fixing the filter use fixing plate and cabl...

Страница 22: ...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 top shelf of the ref...

Страница 23: ...ice tray 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 spilt water and throw away into the sink 5 When ice tray has finished rotation water comes ou...

Страница 24: ...ice cube is too small increase the water supplying time This happens when too small water is supplied into the ice tray 4 If ice cube sticks 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 am...

Страница 25: ...RZ TEMP REF TEMP REF TEMP DISPENSER LOCK SUPER FRZ LOCK SUPER FRZ LOCK ON OFF ROOM TEMP MAX MIN MAX MIN MAX MIN MAX MIN LOCK ON OFF ROOM TEMP 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...

Страница 26: ...ase 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 other than lock relea...

Страница 27: ...n On is immediately 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 set...

Страница 28: ...control by linking with the COMP 2 It controls at the single RPM without varying RPM 3 Failure sensing method is same as in fan motor of 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 cold storage room or home ...

Страница 29: ...M FUNCTION 29 Function Load Operation Sequence Remark In applying Initial power TEST MODE When temperature of a frost removal sensor becomes more than 45 C In purchase movement 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 it immediately returns to the test mode for initial op...

Страница 30: ...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 31: ... 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 Even if pressing the test button during failure code display test mode will...

Страница 32: ... part is turned 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 cub...

Страница 33: ...sformer 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 EXPLAT...

Страница 34: ...circuit 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 ge...

Страница 35: ...re 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 door opening if even one of both is opened The fan motor is immediately stop if opening doors of the freezing room or cold storage room at the TEST mode and it immediately operates...

Страница 36: ...r cold storage room are connected to the door open sensing circuit 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 door opening if even one of both is opened EXPLATION FOR MICOM CIRCUIT 36 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 ...

Страница 37: ...FOR MICOM CIRCUIT 37 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 38: ...or in failure of the L wire Lamp does at the cold storage room not turn on if the door switch of the cold storage room fails to sense the door open switch C D or the home bar switch EXPLATION FOR MICOM CIRCUIT 38 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 ...

Страница 39: ...oval sensor necessary for frost removal Short or open status of every temperature sensor is as follows EXPLATION FOR MICOM CIRCUIT 39 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 Ice making sensor POINT E Voltage Room temperatu...

Страница 40: ...emoval sensor necessary for frost removal Short or open status of every temperature sensor is as follows EXPLATION FOR MICOM CIRCUIT 40 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 PO...

Страница 41: ...47 L247 P207 L207 2 GR C247 B247 C207 B207 The above circuits are used for designating separation by model as option and notifying it to 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 EXPLATION FOR MICOM CIRCUIT 41 36 R21 4 7K Separation Con...

Страница 42: ...COM 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 mo...

Страница 43: ... change of speed for the fan motor 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 EXPLATION FOR MICOM CIRCUIT 43 a d part b part e part c f part Motor OFF 5V 2V or less 2V or less 0 V Motor ...

Страница 44: ...2 GR C247 B247 C207 B207 EXPLATION FOR MICOM CIRCUIT 44 b e c f a d Speed Speed ...

Страница 45: ...storage will increase by 1 C EXPLATION FOR MICOM CIRCUIT 45 Temperature compensation at R room Temperature compensation at F room Temperature compensation at R room Temperature compensation at F room Freezing room Cold storage room Resistance value Temperature Resistance value Temperature Remarks RCF1 compensation RCR1 compensation 180 kΩ 5 C 180 kΩ 2 5 C Warmly 56 kΩ 4 C 56 kΩ 2 0 C compensate 33...

Страница 46: ...wn Down change Up Up Up Up Up Up Up Up 1 5 C 1 C 0 5 C No 0 5 C 1 C 1 5 C 2 C 2 5 C 3 C 3 5 C 5 6 kΩ 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 Cold storage 8 2 kΩ Down Down Down Drop change Up Up Up Up Up Up room 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 RCR1 10 kΩ Down Down Down Down Down change Up Up Up Up Up 3 C 2 5 C 2 C 1 5 C 1 ...

Страница 47: ...ervice EXPLATION FOR MICOM CIRCUIT 47 Compensation Compensation 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 CUT 1 C CUT 1 C CUT 1 C CUT CUT 2 C CUT CUT 2 C CUT CUT 0 C CUT CUT 0 C CUT CUT 0 C CUT CUT 0 C CUT CUT CUT 1 C CUT CUT CUT 1 C CUT CUT CUT CUT 0 C Temperature compensation in CUT JCR1 1 C 2 ...

Страница 48: ...y PCB is required 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 EXPLATION FOR MICOM CIRCUIT 48 GND 12Vdc Transmission Transmission Reception Reception CRUSHED CUBED WATER TEMP TEMP FRZ TEMP REF TEMP DISPENSER LOCK SUPER FRZ OFF ROO...

Страница 49: ...th a digital tester after separating CON8 of the PWB ASSY and the MAIN part u Resistance of the freezing sensor shall be measured with a digital tester after separating CON7 of the PWB ASSY and the MAIN part EXPLATION FOR MICOM CIRCUIT 49 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 ...

Страница 50: ...3 PWB parts diagram and list 3 1 PWB Ass y main part diagram 1 GR P247 L247 P207 L207 EXPLATION FOR MICOM CIRCUIT 50 ...

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

Страница 52: ...3 2 Parts list 1 GR P247 L247 P207 L207 EXPLATION FOR MICOM CIRCUIT 52 ...

Страница 53: ...EXPLATION FOR MICOM CIRCUIT 53 WATER SUPPLY S W ...

Страница 54: ...2 GR C247 B247 C207 B207 EXPLATION FOR MICOM CIRCUIT 54 ...

Страница 55: ...EXPLATION FOR MICOM CIRCUIT 55 WATER SUPPLY S W ...

Страница 56: ...3 3 DISPLAY ASSY part diagram 1 GR P247 L247 P207 L207 EXPLATION FOR MICOM CIRCUIT 56 DOUBLE SIDE TAPE SPREAD SHEET ...

Страница 57: ...2 GR C247 B247 C207 B207 EXPLATION FOR MICOM CIRCUIT 57 DOUBLE SIDE TAPE SPREAD SHEET ...

Страница 58: ...3 4 DISPLAY circuit diagram 1 GR P247 L247 P207 L207 58 Parts without mark means SMD parts Reception Transmission ...

Страница 59: ...2 GR C247 B247 C207 B207 59 Reception Transmission Parts without mark means SMD parts ...

Страница 60: ...4 PWB circuit diagram PWB circuit diagram may vary a little bit depending on actual condition 1 GR P247 L247 P207 L207 EXPLATION FOR MICOM CIRCUIT 60 ...

Страница 61: ...EXPLATION FOR MICOM CIRCUIT 61 ...

Страница 62: ...2 GR C247 B247 C207 B207 EXPLATION FOR MICOM CIRCUIT 62 ...

Страница 63: ...EXPLATION FOR MICOM CIRCUIT 63 ...

Страница 64: ...be ice can be dispensed if there is ice in the ice bank 7 When dispenser water rubber button is pressed water valve opens and water is supplied if water valve is normally installed on the right side of the machine room 8 Ice and water are not available when freezer door is open ICEMAKERANDDISPENSEROPERATIONPRINCIPLEANDREPAIRMETHOD 64 Level Ice Maker Cube Mould for Initial Control after power is in...

Страница 65: ...r supply 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 Ice Making Con...

Страница 66: ... 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 ice maker if ice ejection motor or Hall IC i...

Страница 67: ...hen test function performs normally 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 Ice making Ice ejection Returning to horizontal conditions Water supply 5 Remove ice from the ice maker cube mould and press test switch when ice maker cube mould is full of ice as ice ejection and wa...

Страница 68: ...heck Failed Ice Maker 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 Ice Maker Unit Replace Main PWB Are ice ejection and level return normal when test switch is ...

Страница 69: ...tch installed at the automatic ice maker 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 o...

Страница 70: ...CIRCUIT 70 ...

Страница 71: ...CIRCUIT 71 3854JD1058A ...

Страница 72: ... 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 intern...

Страница 73: ...itintheair 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 During rest time Afterwork ...

Страница 74: ...s not disconnected Injectthroughthe hole Seal with drain P U lump input 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 t...

Страница 75: ...fanmotor Badinsulationofcasedoor SheathHeater rated Heaterplate rated Heatercord L rated Heaterplate Heatercord L Gap Badattachment Contraction Badadhesion Weakbindingforceathinge Fanmotor Door switch Self locked Wire is cut Badterminalcontact Contact distance Buttonpressure Meltedcontact Contact Poordoor attachment Door liner dimension Contractioninner liner Misalignment Badterminal connection P ...

Страница 76: ...constrained Insufficient motorRPM Faultyfan Shorud Bent Iceandforeignmaterialsonrotatingparts Fanshroudcontact Clearance Dampingevaporatorcontact Accumulatedresidualfrost Fanmisuse Bad shape Looseconnection Nottightlyconnected Insertdepth Ratingmisuse Smallcapacity Lowvaltage Malfunction of charging cylinder Wrongsettingofrefrigerant Insufficient compressor Faulty compressor Fanoverload Fanmisuse ...

Страница 77: ... dump liquid Faulty contact Faulty temperature characteristics External air inflow Rubber motor assembly direction reverse 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 Differentrating...

Страница 78: ...r compartment operating sounds Compressor sound Sound from machine itself inserted Sound from vibration Restrainer Rubber 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 O L P sound Chattering sound Insulation paper vibration...

Страница 79: ...fault Coregap Bad connection Correct screw connection Bad assembly Distortion Foreignmaterialsinside Badconnection Partlydamaged Not connected Badpipecaulking Normaloperatingsound Vibrationsound Agedrubberseat Badtorqueforassemblingmotor bracket Fanguidecontact Shroudburrcontact Dampingevaporatorcontact Residualfrostcontact Unbalance Iceonthefan Airintake oppositetomotor rubberassembly Supporterdi...

Страница 80: ...Travlel distance Bad connection Bad terminal contact P U liquid leak 1 Lead wire is damaged Wire damage when assembling P T C 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 te...

Страница 81: ...weendoorlinerandinnerliner Refrigerator compartmentis openedwhenfreezer compartmentis closed faultystopper High Faultydampercontrol Buttonissetat weak Doorisopen interferenceby food No deodorizer Poor capacity Seal condition Store special odorous food Longtermstorage Odorsfromchemicalprocucts Biggerdoorfoam Hinge Pintilted Poorflatness Nowasher Nogreaseandnotenough quantity Stopperwornout Badfreez...

Страница 82: ... 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 reconfirm 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 83: ...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 84: ... 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 85: ...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 86: ...mpurities 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 between...

Страница 87: ...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 88: ...asket attachment Replacement should compartment Check door assembly conditions conditions and replace it be done when it Faulty gasket Door assembly and replacement cannot be repaired Faulty assembly 3 Overcooling in the refrigerator Check refrigerator compartment Replace faulty parts compartment is overcooled when button Faulty damper in the refrigerator pressed on weak compartment Check parts ar...

Страница 89: ...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 90: ... inserting 6 Adjust fan to be in the center of conditions in pipes bell mouth of the fan guide 2 3 Touch pipes with hands or screw 7 Leve a clearance between driver check the change of interfering parts and seal gaps in sound the structures 8 Reassemble the parts which make 3 Fan operation sound in the freezer 3 1 Check fan insertion depth and sound compartment blade damage 9 Leave a clearance if ...

Страница 91: ...ion with rubber 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 92: ...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 93: ...nyl 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 odors Dry th...

Страница 94: ...rts 7812 7805 terminals circuit in circuit explanation PCB electric terminal Check fuse in PCB electric Replace PCB fuse fuse is burnt out terminal with a tester STR Parts are Check if STR No 2 and 3 pins Replace parts Applicable to damaged are cut when power is off model with dispenser Abnormal Bad connection Lead Wire connecting Check Lead Wire terminals Reconnect Lead display LCD between Main P...

Страница 95: ...nce characteristics 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...

Страница 96: ...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 Assy Defective refrigerator Defective refrigerator Check the resistance of Replace refrigerator Refer to sensor sens...

Страница 97: ...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 98: ...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 99: ...acuum 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 rubber pipes for R12 refrigerant shall piping exclusive mixing of be melted when they are...

Страница 100: ...ile refrigerator operates scales punching off flier Weld carefully after inlet pinching gas welding machine Check leak at weld joints Electronic Leak Detector Minute leak Use electronic leak detector Driver Ruler Big leak Check visually or fingers 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 if warm Check fr...

Страница 101: ...l leak will happen 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...

Страница 102: ...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 103: ...easure the weight Calculate the weight of refrigerant charged into the bombe by subtracting the weight of an evacuated bombe 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 Be sure to keep 5g in the...

Страница 104: ...nser Drier Evaporator Bombe Rubber 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 shall be melted and insulation material polyurethane shall be burnt if not cared during welding inner case parts 4 The copper pipe shall be oxidized by overheatin...

Страница 105: ...OINT PIPE ASSY HOT LINE Freezer PIPE ASSY HOT LINE Refrigerator PIPE ASSY JOINT CONDENSER ASSY WIRE PIPE ASSY SUCTION DRIER ASSY CAPI TUBE Copper Brazer Copper Brazer Silver Brazer Copper Brazer Copper Brazer Copper Brazer Coppper Brazer Silver Brazer Copper Brazer ...

Страница 106: ... 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 sound is...

Страница 107: ...g also makes sound When water Noise from motor sounds Whizz freezes to ice freezing sounds such as click click are heard When ice is being ejected sounds like Whizz produced by a motor to rotate an ice tray and ice dropping and hitting ice bank 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 pre...

Страница 108: ...istics of ice cream The freezing point of ice cream is below 15 C 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 ...

Страница 109: ...tton 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 if temperature is set at MID If hot air comes into the refrigerator fine frost forms as cold air mi...

Страница 110: ...ainer 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...

Страница 111: ... bracket hinge pin is deformed during assembling freezer and refrigerator doors fix 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 Assy 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 freeze...

Страница 112: ...6 Disassembly of shroud F U Disconnect housing of B after removing two rail guides with a blade screwdriver 7 Disassembly 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 ASSY 1 Dispenser Model 1 How to disassemble 1 Remove ice bank ...

Страница 113: ...e Assy housing 4 Loosen four screws with a phillips screwdriver and pull a funnel Assy to disconnect 5 Duct cap Assy is disconnected if hold lever connecting screw is loosened with a phillips screwdriver 6 For assembling a duct cap Assy 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 And then assemble a holde...

Страница 114: ... DISPLAY 2 COVER DISPENSER 4 PWB PCB ASSY DISPLAY 7 FUNNEL ASSY 8 SWITCH MICRO 9 FRAME FUNNEL 10 LEVER SWITCH 11 FUNNEL 12 RUBBER FUNNEL 13 SWITCH ROCKER 14 SOLENOID ASSY 15 SPRING 16 HOLDER LEVER 17 CAP DUCT 19 LEVER DISPENSER 20 RUBBER CAP 21 BUTTON ASSY 22 BUTTON 23 HOLDER BUTTON 24 DECO DRAIN 17 Cap Assy Duct Detailed Drawings ...

Страница 115: ... refrigerator compartment door with a phillips screwdriver And loosen 4 screws and two screws Pull H Bar door Assy forward to disassemble 3 Loosen two screws fixed on H Bar door Assy and two screws with a cross driver to disassemble arm Assy 4 Assemble parts by performing the disassembly in reverse order Note Assemble carefully parts until they are fixed firmly when assembling them Adjust exterior...

Страница 116: ...FREEZER DOOR PART GR P247 GR P207 GR L247 GR L207 EXPLODED VIEW 116 202A 200A 210C 210B 210A 210C 201A 203A 206B 206A 206C 206E 205C 205B 205D 205C 205A 205F 205E 205A ...

Страница 117: ...FREEZER DOOR PART GR C247 GR C207 GR B247 GR B207 EXPLODED VIEW 117 202A 200A 210B 210B 210B 210C 201A 203A 210C 206B 206A 206C 206E 205C 205B 205D 205C 205A 205F 205E 205A 207A ...

Страница 118: ... Optional part EXPLODED VIEW 118 232A 266A 261A 265A 267A 263A 266B 240C 240C 240B 264C 264A 264B 240A 147A 260A 263B 266B 265A 267A 402B 266C 266C 231A 233A 230A 234A 243A 243A 241B 241A 262A 147B 147C 236A 206B 206D 206F 205C 205B 205D 205C 205A 205F 205E 205A ...

Страница 119: ...R L207 GR B247 GR B207 REFRIGERATOR DOOR PART Optional part EXPLODED VIEW 119 233A 232A 240C 240C 240A 240A 147A 231A 230A 234A 243A 243A 241B 241A 147B 147C 236A 206B 206D 206F 205C 205B 205D 205C 205A 205F 205E 205A ...

Страница 120: ...XPLODED VIEW 120 270A 271B 271A 103A 400A 312A 402A 137A 136D 136A 135A 136B 136C 403A 401A 152A 128C 128D 131B 131A 206A 125A 105B 272A 130A 120B 120B 120D 120B 120A 135B 320A 121A 101A 132A 131D 131C 131E 131B 131A 408A 302B 316B 400A ...

Страница 121: ...1A 406B 145A 145A 103A 152A 116A 115B 401A 150A 162A 162B 177A 140C 140D 140A 171B 141C 141D 171A 170C 170B 141A 170A 140C 140D 140A 166B 166A 165C 160D 165A 161A 160C 160D 160B 160A 272B 151C 155A 146A 626B 626A 626C 624C 624A 177B 115A 101B 151D 151E 160B or 165B 624A ...

Страница 122: ...6A 621B 612A 612B 612C 615A 616B 616C 616A 613A 616E 623A 623A or 623B 618A 622A 616D 404A 620A 620B 616A 610A 610A 611A 611B 625A 616G 619A 601A 605A 602A 607A 600A 603A 510B 603B 604A 616F 627A 624B 619A 601A 605A 602A 604A 603B 603A 607A 600A 611A 611C 611D ...

Страница 123: ...tional part EXPLODED VIEW 123 304A 305C 305B 313A 104A 305C 305B 303C 303B 303A 305A 407B 500A 502B 502A 406A 308A 308C 308B 309C 403B 309B 309A 105C 105D 105E 505A 105F 407A 300A 310B 307A 306A 310A 317B 317A 301A 307A 316A ...

Страница 124: ...DISPENSER PART EXPLODED VIEW 124 278A 278F 402C 278D 405A 275A 276A 401C 281A 276B 280C 280A 207A 277A 280B 278B 278C 279A 501A ...

Страница 125: ...P No 3828JD8376X SEP 2001 Printed in Korea ...

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