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LG SxS Service Manual

Refrigerator
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See also: Owner's Manual , Owner's Manual & Warranty
REFRIGERATOR
SERVICE MANUAL
CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
Ref No :
GW-P227
Ref No :
GW-L227
http://biz.lgservice.com
Ref No :
Ref No :
GW-C227
GW-B227

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  • Page 1 http://biz.lgservice.com REFRIGERATOR SERVICE MANUAL CAUTION PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK BEFORE CHECKING OR OPERATING THE REFRIGERATOR. Ref No : Ref No : Ref No : Ref No : GW-P227 GW-L227 GW-C227 GW-B227...

  • Page 2: Table Of Contents

    CONTENTS WARNINGS AND PRECAUTIONS FOR SAFETY ........................ 3 SPECIFICATIONS................................... 4 PARTS IDENTIFICATION ................................5 HOW TO INSTALL THE REFRIGERATOR ..........................8 HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR ..................8 HOW TO INSTALL WATER PIPE............................9 HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER ............13 MICOM FUNCTION ................................

  • Page 3: Warnings And Precautions For Safety

    WARNINGS AND PRECAUTIONS FOR SAFETY Please observe the following safety precautions in order to 8. Do not fray, damage, machine, heavily bend, pull out, use safely and correctly the refrigerator and to prevent or twist the power cord. accident and danger during repair. 9.

  • Page 4: Specifications

    SPECIFICATIONS 1. Ref No. : GW-P227/L227/C227/B227 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 894(W) 753(D) 1753(H) FIRST DEFROST 4 - 5 Hours NET WEIGHT (kg) 128(P227), 123(L227),119(B227),114(B227) DEFROST CYCLE 13 - 15 Hours COOLING SYSTEM Fan Cooling DEFROSTING DEVICE Heater, Sheath TEMPERATURE CONTROL Micom Control ANTI SWEAT HEATER...

  • Page 5: Parts Identification

    PARTS IDENTIFICATION 1. Ref No. : GW-P227/L227(INTERNAL FILTER) Cover PWB Dispenser Cover Assembly Water Tube Ice & Water Dispenser Button Home Bar *L227: Non Home bar Freezer Refrigerator Compartment Compartment Milk product corner Lamp Automatic Shelf Icemaker Wine holder (Plastic or wire) Door Rack Shelf or Drawer Shelf...
  • Page 6 PARTS IDENTIFICATION 2. Ref No. : GW-P227/L227(EXTERNAL FILTER) Cover PWB Dispenser Cover Assembly Ice & Water Dispenser Button Home Bar *L227: Non Home bar Freezer Refrigerator Compartment Compartment Milk product corner Lamp Automatic Shelf Icemaker Wine holder (Plastic or wire) Shelf or Drawer Door Rack Shelf...
  • Page 7 PARTS IDENTIFICATION 3. Ref No. : GW-C227/B227 Cover PWB Frame Display Home Bar *B227: Non Home bar Freezer Refrigerator Compartment Compartment Milk product corner Lamp Door rack Shelf Wine holder (Plastic or wire) Shelf or Drawer Door rack (1piece or 2piece) Shelf Lamp Shelf or Drawer...

  • Page 8: How To Install Refrigerator

    HOW TO INSTALL REFRIGERATOR 1. How to Adjust Door Height of Refrigerator Make the refrigerator level first. (If the refrigerator is not installed on the flat floor, the height of freezer and refrigerator door may not be the same.) 1. If the height of freezer door is lower than that of 2.

  • Page 9: How To Install Water Pipe

    HOW TO INSTALL REFRIGERATOR 2. How to Install Water Pipe 2-1. When connecting directly to the water tap. Please confirm the following installation parts. Before Installation 1. The icemaker requires the water pressure of 1.5 - 8.5kgf/cm . (It is acceptable if city water fills a cup of 180cc with water for 3 seconds) 2.
  • Page 10 HOW TO INSTALL REFRIGERATOR 1. Connection of Pipe Connector A and B. Caution : • Feed pipe should be connected to cold water line. If it is connected to hot water line, trouble 1) Turn off main valve of water pipe. may occur.
  • Page 11 HOW TO INSTALL REFRIGERATOR 3. When customer uses bottled water. *If customer wants to use bottled water, extra pump should be installed as shown below. 1. The pump system should not be on the floor (it may cause noise and vibration). Securely fasten the inlet and outlet nuts of pump.
  • Page 12 HOW TO INSTALL REFRIGERATOR Install Water Filter (Applicable to some models only) Control box Before Installing water filter 1. Before installing the filter, take out the top shelf of the refrigerator after tilting it to the direction ( ) and lifting it to the direction ( ) and move it to the lower part.
  • Page 13 HOW TO INSTALL REFRIGERATOR 3. How to Control the Amount of Water Supplied to Icemaker. 3-1. Confirm the amount of water supplied to the icemaker. 1. Remove the cover bucket : Lift the cover with a slight twisting. 2. Remove the ice bucket : Lift the lower part slightly and take the ice bucket out slowly. •...
  • Page 14 HOW TO INSTALL REFRIGERATOR 3-2. Control the amount of water supplied to the icemaker. Caution : • Please unplug the power cord from the wall outlet and wait for more than three minutes before disconnecting PCB cover as 310V is applied in the control panel. (+) Driver 1.

  • Page 15: Micom Function

    MICOM FUNCTION 1. Monitor Panel 1-1. GW-P227, GW-L227 Optional Function display board Type-1 (88-LED) Type-2 (Bar-LED) 1-2. GW-C227, B227 Optional Function display board Type-1 (88-LED) Type-2 (Bar-LED) - 15 -...
  • Page 16 MICOM FUNCTION 1-3. Display Second Function FREEZER EXPRESS FRZ REFRIGERATOR LIGHT/FILTER Temperature Dispenser selection button Express freezer. adjustment button Lock button (3 seconds) for freezer compartment. Temperature adjustment button Light ON /OFF button / for refrigerator compartment. Filter reset button (3 seconds) 1.
  • Page 17 MICOM FUNCTION 2. Description of Function 2-1. Funnction of Temperature Selection Division Power Initially On 1st Press 2nd Press 3th Press 4th Press Type-1 -19 °C 3 °C 2 °C -23 °C 0 °C -15 °C 6 °C -17 °C 4 °C -22°C (88-LED)
  • Page 18 MICOM FUNCTION 2-2. Automatic ice maker • The automatic ice maker can automatically make 6 pieces of ice cube at a time, 50~60 pieces a day. But these quantities may be varied according to various conditions including how many times the refrigerator door opens and closes. •...
  • Page 19 MICOM FUNCTION 2-5. Control of variable type of freezing room fan 1. To increase cooling speed and load response speed, MICOM variably controls freezing room fan motor at the high speed of RPM and standard RPM. 2. MICOM only operates in the input of initial power or special freezing operation or load response operation for the high speed of RPM and operates in the standard RPM in other general operation.
  • Page 20 MICOM FUNCTION 2-10. Frost removal function 1. Frost removal is performed whenever total operation time of compressor becomes 7 ~ 7.5 hour. 2. In providing initial power (or returning power failure), frost removal starts whenever total operation time of compressor becomes 4 ~ 4.5 hour.
  • Page 21 MICOM FUNCTION 2-12. Function of Trouble Diagnosis(88-LED) 1. Failure diagnosis function is function to facilitate service when nonconforming matters affecting performance of product during use of product. 2. In occurrence of failure, pressing the function adjustment button does not perform function and only alarm sound (“Ding~”) rings. 3.
  • Page 22 MICOM FUNCTION 2-13. Function of Trouble Diagnosis(Bar-LED) 1. Function of trouble diagnosis is to make the repair service easy when the refrigerator is out of order during service. 2. The function control button does not work but the recognition sound is heard when the refrigerator is out of order. 3.
  • Page 23 MICOM FUNCTION Function of Trouble Diagnosis(88LED) 2-14. Test Function 1. The purpose of test function is to check function of the PWB and product and to search for the failure part at the failure status. 2. Test button is placed on the main PCB of refrigerator (test switch), and the test mode will be finished after maximum 2 hours irrespective of test mode and then is reset to the normal status.
  • Page 24 MICOM FUNCTION Function of Trouble Diagnosis(BAR LED) 2-15. Test Function 1. The purpose of test function is to check function of the PWB and product and to search for the failure part at the failure status. 2. Test button is placed on the main PCB of refrigerator (test switch), and the test mode will be finished after maximum 2 hours irrespective of test mode and then is reset to the normal status.
  • Page 25 MICOM FUNCTION * LED check function- When freezer and refrigerator temperature control buttons are pressed for more than 1 second at the same time, all LEDS on the display are on. And it returns to the normal conditions when the buttons are released. * Check of freezer fan rpm variation- Freezer fan speed changes from high speed to standard speed and vice versa for 30 seconds whenever freezer and refrigerator temperature control buttons are pressed at the same time for more than 1 second when freezer fan is in operation and returns to the previous rpm.

  • Page 26: Explation For Micom Circuit

    EXPLATION FOR MICOM CIRCUIT 1. Explanation for PWB circuit 1-1. Power circuit Power circuit consists of SMPS (SWITCHING MODE POWER SUPPLY) power. The SMPS consist of the rectifying part (BD1, CE1) converting AC voltage to DC voltage, the switching part (IC2) switching the converted DC voltage, transformer 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.
  • Page 27 EXPLATION FOR MICOM CIRCUIT <GW-P/L227: 88-LED> <GW-P/L227: Bar-LED> - 27 -...
  • Page 28 EXPLATION FOR MICOM CIRCUIT 1-2. Oscillation circuit Oscillation circuit is a circuit with the purpose of generating basic time for clock occurrence for synchronization and time calculation in relation with information transmission/reception of inside elements of IC1 (MICOM). The OSC1 must always use rated parts since if SPEC is changed, time calculated at the IC1 may be changed or no operation is done.
  • Page 29 EXPLATION FOR MICOM CIRCUIT 1-4. Load/dispenser operation, buzzer driving, door opening circuit 1. LOAD DRIVING CIRCUIT InEven if opening the door of freezing room or cold storage room during operation of fan motor at the freezing room, this circuit does not stop and operates at the standard RPM. In addition, if doors of freezing room or cold storage room, the fan motor normally operates at the RPM previously operated.
  • Page 30 EXPLATION FOR MICOM CIRCUIT <GW-P/L227: Bar-LED> - 30 -...
  • Page 31 EXPLATION FOR MICOM CIRCUIT The fan motor at the freezing room does not stop but operates if opening doors of the freezing room or cold storage room or the home bar during operation of the fan motor at the freezing room. (A), (B), (C) and (D) of door switch for the freezing room or cold storage room are connected to the door open sensing circuit toward both ends of switch to determine door open at MICOM.
  • Page 32 EXPLATION FOR MICOM CIRCUIT Frost Removal AC Converting Homebar Type of Load COMP R-room LAMP Heater Relay Heater Measuring part (IC6) No.16 No.11 No.12 No.15 No.14 Within 1 V Status 12 V <GW-B/C227: Bar-LED> ASSEMBLY - 32 -...
  • Page 33 EXPLATION FOR MICOM CIRCUIT 2. Dispenser operation circuit <GW-P/L227: 88-LED> <GW-P/L227: Bar-LED> - 33 -...
  • Page 34 EXPLATION FOR MICOM CIRCUIT 1) Check load driving status WATER VALVE GEARED SOLENOID PILOT SOLENOID HOME BAR Type of Load MOTOR CUBE VALVE DISPENSER HEATER WATER Measuring part IC7-No.16 IC7-No.15 IC7-No.14 IC7-No.13 IC7-No.12 IC7-No.11 IC7-No.10 Within 1 V Status 12 V 2) Lever S/W sensing circuit Measuring part IC1(Micom) No.15 (16)
  • Page 35 EXPLATION FOR MICOM CIRCUIT 3. Door opening sensing circuit <GW-B/C227: 88-LED> <GW-B/C227: Bar-LED> <GW-P/L227: 88-LED> <GW-P/L227: Bar-LED> - 35 -...
  • Page 36 EXPLATION FOR MICOM CIRCUIT CONDITIONS Bell sounds when button on Beep sounds when warning dosplay is pressed. door opening. MEASURING POINTS 0.05 s 0.2 s 0.1 s 0.4 s 0.5 s 0.5 s IC1 (No. 48 Pin) IC1 (No. 51 Pin) 2.63 kz (DING) 2.21 kz (DONG) 2.63 kz (BEEP)
  • Page 37 EXPLATION FOR MICOM CIRCUIT 1-5. Temperature sensing circuit <GW-P/L227: 88-LED> <GW-P/L227: Bar-LED> - 37 -...
  • Page 38 EXPLATION FOR MICOM CIRCUIT The above circuits are circuits attached to freezing room sensor or cold storage room sensor for adjusting setting temperature at the freezing room and cold storage room, ice-making sensor for sensing water temperature in ice-making, or an evaporator for sensing temperature of a frost removal sensor necessary for frost removal.
  • Page 39 EXPLATION FOR MICOM CIRCUIT <GW-B/C227: 88-LED> - 39 -...
  • Page 40 EXPLATION FOR MICOM CIRCUIT <GW-B/C227: Bar-LED> The above circuits are circuits attached to freezing room sensor or cold storage room sensor for adjusting setting temperature at the freezing room and cold storage room, ice-making sensor for sensing water temperature in ice-making, or an evaporator for sensing temperature of a frost removal sensor necessary for frost removal.
  • Page 41 EXPLATION FOR MICOM CIRCUIT 1-6. Switch entry circuit The following circuits are entry circuits for sensing signal form test S/W, electronic single motor damper reed S/W for examining refrigerator. <GW-B/C227: 88-LED> <GW-B/C227: Bar-LED> <GW-P/L227: 88-LED> <GW-P/L227: Bar-LED> 1-7. Option designation circuit (model separation function) <GW-B/C227: 88-LED>...
  • Page 42 EXPLATION FOR MICOM CIRCUIT 1-8. Stepping motor operation circuit <GW-B/C227: 88-LED> <GW-B/C227: Bar-LED> <GW-P/L227: 88-LED> <GW-P/L227: Bar-LED> - 42 -...
  • Page 43 EXPLATION FOR MICOM 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,.
  • Page 44 EXPLATION FOR MICOM CIRCUIT 1-9. Fan motor driving circuit (freezing room, M/C room) 1. This circuit performs function to make standby power ‘0’ by cutting off power supplied to ICs inside of the fan motor in the fan motor OFF. 2.
  • Page 45 EXPLATION FOR MICOM CIRCUIT <GW-P/L227: Bar-LED> - 45 -...
  • Page 46 EXPLATION FOR MICOM CIRCUIT <GW-B/C227: 88-LED> <GW-B/C227: Bar-LED> - 46 -...
  • Page 47 EXPLATION FOR MICOM CIRCUIT 1-10. Temperature compensation and over-cool/weak-cool compensation circuit 1. Temperature compensation at freezing room, cold storage room <GW-P/L227: 88-LED> <GW-P/L227: Bar-LED> <GW-B/C227: 88-LED> <GW-B/C227: Bar-LED> - 47 -...
  • Page 48 EXPLATION FOR MICOM CIRCUIT : JUMP WIRE Freezing room Cold storage room Resistance value Temperature Resistance value Temperature Remarks compensation (RCR1) compensation (R)J1 (R)J2 6.2 kΩ +5 °C 180 kΩ +2.5 °C Warmly 5.1 kΩ +4 °C 56 kΩ +2.0 °C compensate 3 kΩ...
  • Page 49 EXPLATION FOR MICOM CIRCUIT u Temperature compensation table at the cold storage room is as follows: Modification resistance 470 Ω 2 kΩ 3.3 kΩ 5.6 kΩ 8.2 kΩ 10 kΩ 12 kΩ 18 kΩ 33 kΩ 56 kΩ 180 kΩ Current resistance 0.5 °C...
  • Page 50 EXPLATION FOR MICOM CIRCUIT 1-11. Display Circuit <GW-P/L227> - 50 -...
  • Page 51 EXPLATION FOR MICOM CIRCUIT <GW-B/C227> - 51 -...
  • Page 52 EXPLATION FOR MICOM CIRCUIT 1-12. Key Button Input and Display Lighting Circuit This circuit is to judge the work of function control button on the operation panel and to light each function indication led (LED module). It is driven by SCAN method. <GW-P/L227: 88-LED>...
  • Page 53 EXPLATION FOR MICOM CIRCUIT <GW-B/C227: 88-LED> <GW-B/C227: Bar-LED> - 53 -...

  • Page 54: Compensation Circuit For Weak-Cold, Over-Cold At Freezing Room

    EXPLATION FOR MICOM CIRCUIT 2. Compensation circuit for weak-cold, over-cold at freezing room <GW-P/L/B/C227: 88-LED> <GW-P/L/B/C227: Bar-LED> Temperature compensation in CUT JCR1 +1 °C +2 °C JCR2 +1 °C JCR3 -1 °C -2 °C JCR4 -1 °C Compensation Compensation Temperature compensation value for weak-cold for over-cold Remarks...

  • Page 55: Pwb Parts Drawing And List

    EXPLATION FOR MICOM CIRCUIT 3. PWB Parts Drawings and List 3-1. PWB Assembly Main Parts Drawings <GW-P/L227: 88-LED> - 55 -...
  • Page 56 EXPLATION FOR MICOM CIRCUIT <GW-P/L227: Bar-LED> - 56 -...
  • Page 57 EXPLATION FOR MICOM CIRCUIT <GW-B/C227: 88-LED> - 57 -...
  • Page 58 EXPLATION FOR MICOM CIRCUIT <GW-B/C227: Bar-LED> - 58 -...
  • Page 59 EXPLATION FOR MICOM CIRCUIT 3-2. Parts List <GW-P/L227: 88-LED> - 59 -...
  • Page 60 EXPLATION FOR MICOM CIRCUIT <GW-P/L227: 88-LED> - 60 -...
  • Page 61 EXPLATION FOR MICOM CIRCUIT <GW-P/L227: Bar-LED> - 61 -...
  • Page 62 EXPLATION FOR MICOM CIRCUIT <GW-P/L227: Bar-LED> - 62 -...
  • Page 63 EXPLATION FOR MICOM CIRCUIT <GW-B/C227: 88-LED> - 63 -...
  • Page 64 EXPLATION FOR MICOM CIRCUIT <GW-B/C227: 88-LED> - 64 -...
  • Page 65 EXPLATION FOR MICOM CIRCUIT <GW-B/C227: Bar-LED> - 65 -...
  • Page 66 EXPLATION FOR MICOM CIRCUIT <GW-B/C227: Bar-LED> - 66 -...

  • Page 67: Ice Maker And Dispenser Working Principles And Repair

    ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 1. Working Principles 1-1. Ice Maker Working Principles Power Input Initial Control • Level Ice Maker Cube Mould for “Initial Control” after power is input. Ice Making Control • Wait until the water in the cube mould is frozen after ice maker starts operation.

  • Page 68: Function Of Ice Maker

    ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 2. Function of Ice Maker 2-1. Initial Control Function 1. When power is initially applied or reapplied after power cut, it detects level of ice maker cube mould after completion of MICOM initialization. The detecting lever moves up and down. 2.
  • Page 69 ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 2-4. Ice Ejection Control Function 1. This is to eject ice from ice maker cube mould after ice making is completed. 2. If Hall IC signal is on within 3.6 seconds after ice ejection motor rotates in normal direction, it does not proceed ice ejection but waits.
  • Page 70 ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 2-5 Test Function 1. It is to force the operation during operation test, service, and cleaning. The test switch is mounted under the automatic ice maker. The test function starts when the test switch is pressed for more than 0.5 second. 2.

  • Page 71: Ice Maker Troubleshooting

    ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 3. Ice Maker Troubleshooting * Troubleshooting: it is possible to confirm by pressing freezer and refrigerator temperature control buttons for more than 1 second. (ice maker is normal if all leds are on): refer to trouble diagnposis function in MICOM function 2-8 (page 18) <GW-P/L227: 88-LED>...
  • Page 72 ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR <GW-P/L227: Bar-LED> Is DC Power (5V and 12V) Failed DC Power Change main PWB output normal? • Check DC power (5V, 12V). Is cube ice led off during Replace Ice making Failed ice making sensor troubleshooting check? Sensor •...

  • Page 73: Circuit

    CIRCUIT <GW-P/L/B/C227: 88-LED> - 73 -...
  • Page 74 CIRCUIT <GW-P/L/B/C227: Bar-LED> - 74 -...

  • Page 75: Trouble Diagnosis

    TROUBLE DIAGNOSIS 1. TROUBLE SHOOTING CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK * Measuring instrument : 1) No power on outlet. 1. Faulty start Multi tester 2) No power on cord. Bad connection between adapter and outlet. (faulty adapter) Check the voltage.
  • Page 76 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 2. No cooling. Check the clogged 2) Refrigeration system is clogged. evaporator by heating (as Moisture Residual moisture Air Blowing. Not performed. soon as the cracking sound clogged. in the evaporator. Too short.
  • Page 77 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 3. Refrigeration 1) Refrigerant Partly leaked. Weld joint leak. is weak. Parts leak. 2) Poor defrosting capacity. Check visually. Drain path (pipe) clogged. Inject P/U into drain hose. Inject through the hole.

  • Page 78: Faults

    TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 3. Refrigeration Residual Weak heat from heater. Sheath Heater - rated. is weak. frost. Heater plate - rated. Too short defrosting time. Defrost Sensor. - Faulty characteristics. Seat-D(missing, location. thickness). Structural fault.
  • Page 79 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 3. Refrigeration 4) No cooling air circulation. is weak. Faulty fan motor. Fan is Fan shroud contact. - Clearance. constrained. Damping evaporator contact. Accumulated residual frost. Small cooling air Insufficient Fan overload.
  • Page 80 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 4. Warm 1) Colgged cooling path. refrigerator P/U liquid leak. compartment Foreign materials. –– P/U dump liquid. temperature. 2) Food storate. Store hot food. Store too much at once. Door open. Packages block air flow.
  • Page 81 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 6. Dew and 4) Dew on door. ice formation. Dew on the duct door. - Duct door heater is cut. Dew on the dispense Recess Heater is cut. recess. Duct door is open. / Foreign material clogging. Dew on the door surface.
  • Page 82 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 7. Sounds 1) Compressor compartment operating sounds. Transformer sound. Its own fault. –– Core gap. Bad connection. –– Correct screw connection. Drip tray vibration sound. Bad assembly. Distortion. Foreign materials inside. Back cover machine sound.
  • Page 83 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 8. Faulty lamp 1) Lamp problem. Filament blows out. (freezer and Glass is broken. refrigerator 2) Bad lamp assembly. Not inserted. compartment). Loosened by vibration. 3) Bad lamp socket. Disconnection. Bad soldering.
  • Page 84 TROUBLE DIAGNOSIS CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK 10. Structure, 1) Door foam. appearance Sag. Weak torque of Bolt is loosened during and others. hinge connection. transportaion. Not tightly fastened. Screw worn out . Weak gasket Adhesion surface. adhesion.
  • Page 85 TROUBLE DIAGNOSIS - 85 -...
  • Page 86 TROUBLE DIAGNOSIS - 86 -...
  • Page 87 TROUBLE DIAGNOSIS - 87 -...
  • Page 88 TROUBLE DIAGNOSIS - 88 -...
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  • Page 102: Cooling Cycle Heavy Repair

    TROUBLE DIAGNOSIS 3. Cooling Cycle Heavy Repair 3-1. The Heavy Repair Standards for Refrigerator with R134a Refrigerant Items Unit Standards Purposes Remarks Pipe and piping Min. Pipe:within 1 hour. To protect The opening time should be reduced to a system opening time. Comp:within Moisture half of the standards during rain and...
  • Page 103 TROUBLE DIAGNOSIS 3-2. Summary Of Heavy Repair Process Contents Tools Trouble diagnosis Remove refrigerant - Cut charging pipe ends and discharge refrigerant from Filter, side cutters Residuals drier and compressor. - Use R134a oil and refrigerant for compressor and drier Pipe Cutter, Gas welder, N - Confirm N sealing and packing conditions before use.
  • Page 104 TROUBLE DIAGNOSIS 3-3. Precautions During Heavy Repair Items Precautions 1. Use of tools. 1) Use special parts and tools for R134a. 2. Removal of retained 1) Remove retained refrigerant more than 5 minutes after turning off a refrigerator. refrigerant. (If not, oil will leak inside.) 2) Remove retained refrigerant by cutting first high pressure side (drier part) with a nipper and then cut low pressure side.
  • Page 105 TROUBLE DIAGNOSIS 3-4. Practical Work For Heavy Repair Items Precautions Evaporator 1. Removal of residual Low pressure side refrigerant. KEYPOINTING Compressor Observe the sequence for removal of refrigerant. Drier Suction (If not, compressor oil may leak.) Release High pressure side Condenser Refrigent Intake...
  • Page 106 TROUBLE DIAGNOSIS Items Precautions 4.Vacuum degassing. Evaporator Suction pipe Compressor Drier Condenser pressure High Blue pressure Yellow Vaccum KEYPOINTING Pump - If power is applied during vacuum degassing, vacuum degassing shall be more effective. Pipe Connection - Operate compressor Connect a red hose to the high pressure side and a blue hose to the while charging refrigerant.
  • Page 107 TROUBLE DIAGNOSIS Items Precautions Evaporator Compressor Drier Condenser Bombe 4) Refrigerant Charging Charge refrigerant while operating a compressor as shown above. 5) Pinch a charging pipe with a pinch-off plier after completion of charging. 6) Braze the end of a pinched charging pipe with copper brazer and take a gas leakage test on the welded parts.
  • Page 108 TROUBLE DIAGNOSIS 3-6. Brazing Reference Drawings 1) Type A PIPE ASSEMBLY PIPE ASSEMBLY HOT LINE HOT LINE (Refrigerator) (Freezer) Copper(Silver) Copper Brazer Brazer CAPI - TUBE DRIER ASSEMBLY Silver Silver Brazer Brazer PIPE ASSEMBLY JOINT PIPE ASSEMBLY SUCTION Copper Brazer PIPE ASSEMBLY CONDENSER ASSEMBLY WIRE JOINT...

  • Page 109: How To Deal With Claims

    TROUBLE DIAGNOSIS 4. HOW TO DEAL WITH CLAIMS 4-1. Sound Problems Checks and Measures "Whizz" sounds Explain general principles of sounds. • All refrigerator when functioning properly have normal operating sound. The compressor and fan produce sounds. There is a fan in the freezer compartment which blows cool air to freezer and refrigerator compartments.
  • Page 110 TROUBLE DIAGNOSIS Problems Checks and Measures Sounds of water flowing Explain the flow of refrigerant. • When the refrigerator stops, the water flowing sound happens. This sound happens when the liquid or vapor refrigerant flows from the evaporator to compressor. "Click"...
  • Page 111 TROUBLE DIAGNOSIS 4-2. Measures for Symptoms on Temperature Problems Checks and Measures Refrigeration is weak. 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 depending on their habit and taste. If you feel the refrigeration is weak, then set the temperature control button at “strong”...
  • Page 112 TROUBLE DIAGNOSIS 4-3. Odor and Frost Problems Checks and Measures Odor in the refrigerator compartment. Explain the basic principles of food odor. • Each food has its own peculiar odor. Therefore it is impossible to prevent or avoid food odor completely when food is stored in the completely sealed refrigerator compartment.
  • Page 113 TROUBLE DIAGNOSIS 4-4. Others Problems Checks and Measures The refrigerator case is hot. Explain the principles of radiator. • The radiator pipes are installed in the refrigerator case and partition plate between the refrigerator and the freezer compartment in order to prevent condensation formation.

  • Page 114: How To Disassemble And Assemble

    HOW TO DISASSEMBLE AND ASSEMBLE 1. DOOR (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 1) Remove lower cover and remove clip then forward in arrow B direction.

  • Page 115: Handle

    HOW TO DISASSEMBLE AND ASSEMBLE 2. HANDLE 4) Disassembly of a grille fan(L) : Hold upper part of a grill fan(L) and pull forward carefully 5) Check foam PU sticking conditions around a shroud, 1) Aluminum short handle Model F(U) and F(L) during assembling. If damaged, torn or (1) Grasp the handle by both hands and hold it upward.

  • Page 116: Water Valve Disassembly Method

    HOW TO DISASSEMBLE AND ASSEMBLE 5. WATER VALVE DISASSEMBLY 4). Separate the Mechanical Cover and Valve Screw. METHOD Mechanical Cover 1) Turn off the power of the refrigerator (pull out the plug). Open the FREEZER and REFRIGERATOR Door and disassemble the Lower Cover. 5) Separate the housing and pull out the valve.

  • Page 117: Dispenser

    HOW TO DISASSEMBLE AND ASSEMBLE 7. DISPENSER 5) Loosen fixed screws with a screwdriver and pull the funnel assembly to disconnect. 1) Disconnect funnel assembly by pulling down and forward. Farme Funnel, Assembly Button 2) Disconnect the cover by pulling it fully to the front pull up the rear end of the cover slightly to pull it out You can change LED Lamp in this disassemble state...
  • Page 118 HOW TO DISASSEMBLE AND ASSEMBLE 8) Dispenser Related Parts COVER ASSEMBLY, DISPENSER COVER, DISPENSER DECO COVER, DISPLAY PWB(PCB) ASSEMBLY, DISPLAY FRAME FUNNEL, ASSEMBLY FRAME, FUNNEL LEVER, DISPENSER BUTTON, LEVER SWITCH, MICRO 10 PCB ASSEMBLY, DISPLAY 11 SUPPORTER, HOLDER 12 SHEET DUCT 13 SPRING, LEVER 14 SOLENOID, ASSEMBLY 15 SPRING...

  • Page 119: Home Bar

    HOW TO DISASSEMBLE AND ASSEMBLE 8-2. Home Bar parts disassembly and assembly 8. HOME BAR 1) Disassmble H/Bar. 8-1. Home Bar related parts Using a flat driver or a pick tool, separate a home bar 2) Assembly H/Bar. 1 DOOR ASSEMBLY, H/BAR 5 HINGE ASSEMBLY, H/BAR 2 GASKET, H/BAR 6 COVER, LEVER...

  • Page 120: Exploded View

    EXPLODED VIEW FREEZER DOOR PART : GW-P227 / L227 : Optional part 200A 612A 611B 201A 202A 600A 610A 205A 606A 205F 614A 205B 210B 205D 210B 205C 210C 203A - 120 -...
  • Page 121 EXPLODED VIEW FREEZER DOOR PART : GW-C227,/ B227 : Optional part 200A 201A 202A 205A 210B 205F 205B 205D 210B 210B 205C 210B 207A 203A 279A 501A 279B 210C - 121 -...
  • Page 122 EXPLODED VIEW : GR-P227 / C227 REFRIGERATOR DOOR PART : Optional part 241A 230A 241C 241B 147C 147A 232A 239A 243A 240A 205A 264B 261A 266A 402C 265A 617A 251A 267A 264C 263A 267B 260A 264A 263B 243A 205B 205D 240B 205F 243A...
  • Page 123 EXPLODED VIEW : GW-L227 / B227 REFRIGERATOR DOOR PART : Optional part 241A 230A 241C 241B 147C 147A 232A 239A 243A 240A 205A 243A 205B 205D 240B 205F 243A 240B 231A 233A 205C 240D - 123 -...
  • Page 124 EXPLODED VIEW FREEZER COMPARTMENT : Optional part 131J 154A 138A 131E 101A 270A 131B 271B 271A 138B 137B 131C 131H 131D 137A 136D 132A 402A 403A 128L 128M 136C 136B 136A 128G 128H 152A 121B 135A 128G 137C 128H 121A 625A 316B 120D...
  • Page 125 EXPLODED VIEW REFRIGERATOR COMPARTMENT : Optional part 140A 141A 146B 141B 101B 171A 270B 171B 271B 146A 271C 626C 626B 626A 115A 170A 116A 140A 142A 115B 151F 142C 142D 402B 142B 142D 152A 624C 151C 401A 177A 166B 177B 166C 162A 155A...
  • Page 126 EXPLODED VIEW MACHINE COMPARTMENT : Optional part 406A 502A 407A 407B 505A 303A 500A 303B 502B 304A 303C 313A 316A 300A 310B 307A 317A 307A 301A 317B 104A 306A 308B 309A 309B 305A 403B 305B 310A 309C 305C 308A 308C 105E 305C 305B...
  • Page 127 EXPLODED VIEW DISPENSER PART : Optional part 278A 278C 280B 278B 276B 276A 275A 402D 405A 278F 276B 281A 281B 278G 278H 278J 290A 501A 280A 207B 207A - 127 -...
  • Page 128 P/No. MFL38540601 MAR., 2007 Printed in Poland...

This manual is also suitable for:

Sxs gw-p227Sxs gw-l227Sxs gw-c227Sxs gw-b227

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