LG GR-B197WVS Service Manual
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LG GR-B197WVS Service Manual

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See also: User Manual
REFRIGERATOR
SERVICE MANUAL
CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
MODEL: GR-B197WVS
http://biz.lgservice.com
Ref. No.
GR-B197GVCA
COLOR: SUPER WHITE

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Summary of Contents for LG GR-B197WVS

  • Page 1 REFRIGERATOR SERVICE MANUAL CAUTION PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK BEFORE CHECKING OR OPERATING THE REFRIGERATOR. Ref. No. GR-B197GVCA MODEL: GR-B197WVS COLOR: SUPER WHITE...

  • Page 2: Table Of Contents

    CONTENTS WARNINGS AND PRECAUTIONS FOR SAFETY ........................ 3 SPECIFICATIONS................................... 4 PARTS IDENTIFICATION ..............................17 HOW TO INSTALL THE REFRIGERATOR .......................... 25 HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR ..................25 HOW TO INSTALL WATER PIPE............................26 HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER ............30 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. : GR-P247 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 840(D) 1750(H) FIRST DEFROST 4 - 5 Hours NET WEIGHT (kg) DEFROST CYCLE 13 - 15 Hours COOLING SYSTEM Fan Cooling DEFROSTING DEVICE Heater, Sheath TEMPERATURE CONTROL Micom Control ANTI SWEAT HEATER Dispenser Duct Door Heater...
  • Page 5 SPECIFICATIONS 2. Ref No. : GR-P207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 755(D) 1750(H) FIRST DEFROST 4 - 5 Hours NET WEIGHT (kg) DEFROST CYCLE 13 - 15 Hours COOLING SYSTEM Fan Cooling DEFROSTING DEVICE Heater, Sheath TEMPERATURE CONTROL Micom Control ANTI SWEAT HEATER Dispenser Duct Door Heater...
  • Page 6 SPECIFICATIONS 3. Ref No. : GR-L197 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 725(D) 1750(H) DRIER MOLECULAR SIEVE XH-7 NET WEIGHT (kg) FIRST DEFROST 4 - 5 Hours COOLING SYSTEM Fan Cooling DEFROST CYCLE 13 - 15 Hours TEMPERATURE CONTROL Micom Control DEFROSTING DEVICE Heater, Sheath...
  • Page 7 SPECIFICATIONS 4. Ref No. : GR-L247 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 840(D) 1750(H) DRIER MOLECULAR SIEVE XH-7 NET WEIGHT (kg) FIRST DEFROST 4 - 5 Hours COOLING SYSTEM Fan Cooling DEFROST CYCLE 13 - 15 Hours TEMPERATURE CONTROL Micom Control DEFROSTING DEVICE Heater, Sheath...
  • Page 8 SPECIFICATIONS 5. Ref No. : GR-L207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 755(D) 1750(H) DRIER MOLECULAR SIEVE XH-7 NET WEIGHT (kg) FIRST DEFROST 4 - 5 Hours COOLING SYSTEM Fan Cooling DEFROST CYCLE 13 - 15 Hours TEMPERATURE CONTROL Micom Control DEFROSTING DEVICE Heater, Sheath...
  • Page 9 SPECIFICATIONS 1. Ref No. : GR-C247 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 840(D) 1750(H) LUBRICATING OIL FREOL @10G (310 cc) NET WEIGHT (kg) CAPILLARY TUBE ID 0.83 COOLING SYSTEM Fan Cooling DRIER MOLECULAR SIEVE XH-7 TEMPERATURE CONTROL Micom Control FIRST DEFROST 4 - 5 Hours DEFROSTING SYSTEM...
  • Page 10 SPECIFICATIONS 2. Ref No. : GR-C207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 755(D) 1750(H) LUBRICATING OIL FREOL @10G (310 cc) NET WEIGHT (kg) CAPILLARY TUBE ID 0.83 COOLING SYSTEM Fan Cooling DRIER MOLECULAR SIEVE XH-7 TEMPERATURE CONTROL Micom Control FIRST DEFROST 4 - 5 Hours DEFROSTING SYSTEM...
  • Page 11 SPECIFICATIONS 3. Ref No. : GR-B247 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 840(D) 1750(H) LUBRICATING OIL FREOL @10G (310 cc) NET WEIGHT (kg) CAPILLARY TUBE ID 0.83 COOLING SYSTEM Fan Cooling DRIER MOLECULAR SIEVE XH-7 TEMPERATURE CONTROL Micom Control FIRST DEFROST 4 - 5 Hours DEFROSTING SYSTEM...
  • Page 12 SPECIFICATIONS 4. Ref No. : GR-B207 / GR-B197 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 755(D) 1750(H) LUBRICATING OIL FREOL @10G (310 cc) 890(W) 725(D) 1750(H) CAPILLARY TUBE ID 0.83 NET WEIGHT (kg) DRIER MOLECULAR SIEVE XH-7 COOLING SYSTEM Fan Cooling FIRST DEFROST 4 - 5 Hours TEMPERATURE CONTROL...
  • Page 13 SPECIFICATIONS 1. Ref No. : GR-C247 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 840(D) 1750(H) LUBRICATING OIL FREOL @10G (310 cc) NET WEIGHT (kg) CAPILLARY TUBE ID 0.83 COOLING SYSTEM Fan Cooling DRIER MOLECULAR SIEVE XH-7 TEMPERATURE CONTROL Micom Control FIRST DEFROST 4 - 5 Hours DEFROSTING SYSTEM...
  • Page 14 SPECIFICATIONS 2. Ref No. : GR-C207 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 755(D) 1750(H) LUBRICATING OIL FREOL @10G (310 cc) NET WEIGHT (kg) CAPILLARY TUBE ID 0.83 COOLING SYSTEM Fan Cooling DRIER MOLECULAR SIEVE XH-7 TEMPERATURE CONTROL Micom Control FIRST DEFROST 4 - 5 Hours DEFROSTING SYSTEM...
  • Page 15 SPECIFICATIONS 3. Ref No. : GR-B247 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 890(W) 840(D) 1750(H) LUBRICATING OIL FREOL @10G (310 cc) NET WEIGHT (kg) CAPILLARY TUBE ID 0.83 COOLING SYSTEM Fan Cooling DRIER MOLECULAR SIEVE XH-7 TEMPERATURE CONTROL Micom Control FIRST DEFROST 4 - 5 Hours DEFROSTING SYSTEM...
  • Page 16 SPECIFICATIONS 4. Ref No. : GR-B207 / GR-B197 ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) B207 890(W) 755(D) 1750(H) REFRIGERANT R134a (180g) B197 890(W) 725(D) 1750(H) LUBRICATING OIL FREOL @10G (310 cc) NET WEIGHT (kg) CAPILLARY TUBE ID 0.83 COOLING SYSTEM Fan Cooling DRIER MOLECULAR SIEVE XH-7...

  • Page 17: Parts Identification

    PARTS IDENTIFICATION 1. Ref No. : GR-P247, GR-P207 (Internal Filter) Cover Hinge Cover PWB Frame Display Water Tube Dispenser Lamp Ice & Water Dispenser Button Home Bar Freezer Refrigerator Compartment Compartment Milk product corner Door rack Cover, Lamp-R/U Shelf Automatic Door rack ice maker (1 piece or 2 piece)
  • Page 18 PARTS IDENTIFICATION 2. Ref No. : GR-P247, GR-P207 (External Filter) Cover Hinge Cover PWB Frame Display Water Tube Dispenser Lamp Ice & Water Dispenser Button Home Bar Freezer Refrigerator Compartment Compartment Milk product corner Door rack Cover, Lamp-R/U Shelf Automatic Door rack ice maker (1 piece or 2 piece)
  • Page 19 PARTS IDENTIFICATION 3. Ref No. : GR-L247, GR-L207, GR-L197 (Internal Filter) Cover Hinge Cover PWB Frame Display Water Tube Dispenser Lamp Ice & Water Dispenser Button Freezer Refrigerator Compartment Compartment Milk product corner Cover, Lamp-R/U Door rack Shelf Automatic Door rack (1 piece or 2 piece) ice maker Wine Rack...
  • Page 20 PARTS IDENTIFICATION 4. Ref No. : GR-L247, GR-L207 (External Filter) Cover Hinge Cover PWB Frame Display Water Tube Dispenser Lamp Ice & Water Dispenser Button Freezer Refrigerator Compartment Compartment Milk product corner Door rack Cover, Lamp-R/U Shelf Automatic Door rack (1 piece or 2 piece) ice maker Wine Rack...
  • Page 21 PARTS IDENTIFICATION 1. Ref No. : GR-C247, GR-C207 Cover Hinge Cover PWB Frame Display Home Bar Freezer Refrigerator Compartment Compartment Milk product corner Cover, Lamp-R/U Door rack Shelf Ice Bank Door rack (1 piece or 2 piece) Assembly Wine Rack Lamp Egg Box Snack Corner...
  • Page 22 PARTS IDENTIFICATION 2. Ref No. : GR-B247, GR-B207 Cover Hinge Cover PWB Frame Display Freezer Refrigerator Compartment Compartment Milk product corner Door rack Cover, Lamp-R/U Shelf Ice Bank Door rack Assembly (1 piece or 2 piece) Wine Rack Lamp Egg Box Snack Corner Shelf (Steel,...
  • Page 23 PARTS IDENTIFICATION 3. Ref No. : GR-C247, GR-C207 Cover Hinge Cover PWB Home Bar Freezer Refrigerator Compartment Compartment Milk product corner Cover, Lamp-R/U Door rack Shelf Ice Bank Door rack (1 piece or 2 piece) Assembly Wine Rack Lamp Egg Box Snack Corner Shelf Refreshment center...
  • Page 24 PARTS IDENTIFICATION 4. Ref No. : GR-B247, GR-B207, GR-B197 Cover Hinge Cover PWB Freezer Refrigerator Compartment Compartment Milk product corner Door rack Cover, Lamp-R/U Shelf Ice Bank Door rack Assembly (1 piece or 2 piece) Wine Rack Lamp Egg Box Snack Corner Shelf (Steel,...

  • Page 25: How To Install The 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 26: 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 27 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 28 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 29 HOW TO INSTALL REFRIGERATOR Install Water Filter (Applicable to some models only) Before Installing water filter Control box 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 30: How To Control The Amount Of Water Supplied To The Icemaker

    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. Pull out the ice bank in the upper part of the freezer compartment. Caution : • Do not put hands or tools into the chute to confirm the operation of geared motor.
  • Page 31 HOW TO INSTALL REFRIGERATOR 3-2. Control the amount of water supplied to the Caution : When adjusting the amount of water supplied, adjust step by step. Otherwise the water may icemaker. spill over. Caution : • Please unplug the power cord from the wall outlet and wait for more than three minutes before disconnecting PWB cover as 310V is applied in the control panel.

  • Page 32: Micom Function

    MICOM FUNCTION 1. Monitor Panel 1-1. GR-P247, GR-P207, GR-L247, GR-L207, GR-L197 1-2. GR-C247, GR-C207, GR-B247, GR-B207, GR-B197 Function display board CRUSH WATER CUBE Temp Temp SELECT TEMP TEMP Freezer compartment Refrigerator compartment Dispenser selection button temperature control Button temperature control Button 2.
  • Page 33 MICOM FUNCTION 2-2. Control of Variable Speed Fan in the Refrigerator Compartment 1. Fan motor in the freezer compartment shall change from standard to high speed rpm in order to increase cooling speed and load corresponding speed. 2. High speed rpm is only used for the initial power application and load corresponding operation. But standard rpm is used in the general working conditions.
  • Page 34 MICOM FUNCTION 2-7. Electric Equipment Sequential Operation Electric equipment such as compressor, defrost heater, cooling fan, step motor damper, etc. operates in the following sequence when power is initially applied and test is completed in order to reduce noise and parts damage. Function Operation Sequence Remarks...
  • Page 35 MICOM FUNCTION 2-8. Function of Trouble Diagnosis 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 36 MICOM FUNCTION Note 1) When open air temperature detecting sensor, refrigerator sensor 2, ice maker unit, ice making sensor are abnormal, it is not indicated in the trouble code. But it is indicated while checking LED (press freezer and refrigerator temperature control buttons for more than 1 second at the same time). Normal : LED On.
  • Page 37 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 38: Micom Circuit Description

    MICOM CIRCUIT DESCRIPTION 1. Description of PWB Circuit 1-1. Power Circuit 1. GR-P247, GR-P207, GR-L247, GR-L207, GR-L197 Power circuit is composed of switching mode power supply (SMPS) electric parts. SMPS is composed of rectifying part (D1~D4, CE1) which converts AC to DC voltage, switching part (IC2) which switches this converted DC voltage, trans which transmits primary energy to secondary energy, secondary power source which transmits power to MICOM and IC, and feed back part (IC3, ZD1) which feeds back voltage to primary trans in order to maintain constant secondary voltage.
  • Page 39 MICOM CIRCUIT DESCRIPTION 1-4. Load/Dispenser Operation, Buzzer Driving, Door Opening Detecting Circuit 1. LOAD DRIVING CIRCUIT * Freezer fan motor shall stop when freezer or refrigerator door is open. Freezer fan motor shall immediately operate when freezer or refrigerator door is closed. * Door switches A, B, C, D, E, F of freezer and refrigerator are connected to the door opening detecting circuit in Micom.
  • Page 40 MICOM CIRCUIT DESCRIPTION 2) GR-C247, GR-C207, GR-B247, GR-B207, GR-B197 * Freezer fan motor shall operate when freezer, refrigerator, or home bar door is open. * Door switches A, B, C, D of freezer and refrigerator are connected to door opening detecting circuit in Micom. * Home bar door switch E, F is parallelly connected to the refrigerator switch C, D.
  • Page 41 MICOM CIRCUIT DESCRIPTION 2. Dispenser Operation Circuits GR-P247, GR-P207, GR-L247, GR-L207, GR-L197 POWER 1) LOAD DRIVING CONDITION CHECK WATER VALVE GEARED SOLENOID SOLENOID HOME BAR Refrigerator LOAD TYPE MOTOR CUBE PILOT DISPENSER HEATER Compartment Lamp WATER Measuring Points No.15(IC6) No.10(IC7) No.11(IC7) No.12(IC7) No.16(IC7)
  • Page 42 MICOM CIRCUIT DESCRIPTION 3. Buzzer Driving Circuits 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. 50 Pin) IC1 (No.51 Pin) 2.63 kz (DING) 2.21 kz (DONG)
  • Page 43 MICOM CIRCUIT DESCRIPTION 1-5. Temperature Detecting Circuit, Duct Door Heat Working Circuit The above circuit is fixed in the freezer compartment sensor, refrigerator compartment sensor, ice making sensor, and defrost sensor. The condition of short or open of each temperature sensor is as follows. SENSOR CHECK POINT NORMAL(-30 °C ~ 50 °C)
  • Page 44 MICOM CIRCUIT DESCRIPTION 1-6. Switch Input Circuits The following circuit is an input circuit to detect the test switch for refrigerator detection and to detect the signal of electronic single motor damper reed switch. TEST S/W 1-7. Option Designation Circuit (Model Classifying Function) The above circuit is to designate model by option and inform it to MICOM.
  • Page 45 MICOM CIRCUIT DESCRIPTION Description) MICOM Pin No. 41, 42, and 43 terminals send signals of which wave form are shown on the right in 3.33 msec cycles. These signals pass through input terminals (No. 3, 6, and 8) of motor driving IC6 (TA7774AP) and are sent to the output terminal (No.
  • Page 46 MICOM CIRCUIT DESCRIPTION u Refrigerator compartment temperature compensation table is as shown below. Amended Resi s tance 3.3 k 5.6 k 8.2 k 10 k 12 k 18 k 33 k 56 k 180 k Present Resi s tance 0.5 °C 1 °C 1.5 °C 2 °C...
  • Page 47 MICOM CIRCUIT DESCRIPTION 2. Refrigerator Weak Cooling and Over Cooling Compensation Circuit Temperature Compensation by Cutting JCR1 +1 °C +2 °C JCR2 +1 °C JCR3 -1 °C -2 °C JCR4 -1 °C WEAK COOLING OVER COOLING REFRIGERATOR COMPARTMENT COMPENSATION COMPENSATION REMARKS TEMPERATURE COMPENSATION JCR3...
  • Page 48 MICOM CIRCUIT DESCRIPTION 1-10. Key Button Input and Display Lighting Circuit 1. GR-P247, GR-P207, GR-L247, GR-L207, GR-L197 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. Freezer Refrigerator Crushed...

  • Page 49: Sensor Resistance Characteristic Tabie

    MICOM CIRCUIT DESCRIPTION 2. Sensor Resistance Characteristic Table Refrigerator Sensor 1 and 2, Defrost Sensor and Measured Temperature (°C) Freezer Sensor Open Air Sensor -20 °C 22.3 k 77 k -15 °C 16.9 k 60 k -15 °C 13.0 k 47.3 k -5 °C 10.1 k...

  • Page 50: Pwb Parts Drawing And List

    MICOM CIRCUIT DESCRIPTION 3. PWB Parts Drawings and List 3-1. PWB Assembly Main Parts Drawings 1 GR-P247, GR-P207, GR-L247, GR-L207, GR-L197 - 50 -...
  • Page 51 MICOM CIRCUIT DESCRIPTION 2 GR-C247, GR-C207, GR-B247, GR-B207, GR-B197 - 51 -...
  • Page 52 MICOM CIRCUIT DESCRIPTION 3-2. Parts List 1. GR-P247, GR-P207 / GR-L247, GR-L207, GR-L197 WORK WORK - 52 -...
  • Page 53 MICOM CIRCUIT DESCRIPTION 1. GR-P247, GR-P207, GR-L247, GR-L207, GR-L197 WORK - 53 -...
  • Page 54 MICOM CIRCUIT DESCRIPTION 2. GR-C247, GR-C207, GR-B247, GR-B207, GR-B197 JCR1 JCR2 JCR3 JCR4 - 54 -...

  • Page 55: Pwb Circuit Drawing

    MICOM CIRCUIT DESCRIPTION 4. PWB circuit drawing- PWB circuit drawing may change depending on the conditions. 1 GR-P247, GR-P207, GR-L247, GR-L207, GR-L197 PWB ASSEMBLY MAIN - 55 -...
  • Page 56 MICOM CIRCUIT DESCRIPTION Freezer Refrigerator Crushed PWB ASSEMBLY DISPLAY Temp Temp /Water Control Control /Cube - 56 -...
  • Page 57 MICOM CIRCUIT DESCRIPTION 2. GR-C247, GR-C207, GR-B247, GR-B207, GR-B197 Refrigerator Compartment Temperature Compensation Freezer Compartment Temperature Compensation PWB ASSEMBLY MAIN - 57 -...
  • Page 58 MICOM CIRCUIT DESCRIPTION Freezer Refrigerator PWB ASSEMBLY DISPLAY Temp Temp Control Control - 58 -...

  • Page 59: Working Principles

    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 60: Ice Maker And Dispenser Working Principles And Repair

    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 61 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 62 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 63: 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) Is DC Power (5V and 12V) Failed DC Power...

  • Page 64: Ice Maker Circuits

    ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 4. Ice Maker Circuits FOWARD REVERSE ICE MAKER STOP SWITCH The above ice maker circuits are applied to GR-P247, GR-P207 and GR-L247, GR-L207, GR-L197 and composed of ice maker unit in the freezer and ice maker driving part of main PWB. Water is supplied to the ice maker cube mould through the solenoid relay for ice valve of solenoid valve in the machine room by opening valve for the set time.

  • Page 65: Circuit

    CIRCUIT BASIC TYPE PWB ASSEMBLY MAIN PWB ASSEMBLY DISPLAY - 65 -...

  • Page 66: Circuit Diagram

    CIRCUIT CIRCUIT DIAGRAM DELUXE TYPE • HOME BAR PART(H/BAR-HEATER, DOOR S/W) CAPACITOR PART, THE PLUG TYPE, PWB ASSEMBLY MAIN COMPRESSOR EARTH PART FUSE PART ON CIRCUIT DIAGRAM ARE SUBJECT TO CHANGE IN (P/NO:3J02447C) DIFFERENT LOCALITES AND GN/YL(GN) ACCORDANCE WITH MODEL TYPE. CON7 CON1 F-DOOR S/W...

  • Page 67: 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 68 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 69 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 70 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 71 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 72 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 73 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 74 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 75 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 76 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 77: Faults

    2. Faults 2-1. Power Problems Causes Checks Measures Remarks No power on - Power cord cut. - Check the voltage with tester. -Replace the components. outlet. - Faulty connector insertion. - Check visually. -Reconnect the connecting parts. - Faulty connection between plug - Check visually.
  • Page 78 2-3. Temperature Problems Causes Checks Measures Remarks High Poor cool air circulation due to faulty - Lock –– Check resistance with a - Replace fan motor. temperature fan motor. tester. in the freezer 0 : short. compartment. : cut. - Reconnect and reinsert. - Rotate rotor manually and check rotation.
  • Page 79 2-4. Cooling Problems Causes Checks Measures Remarks High Refrigerant leak. Check sequence Weld the leaking part, recharge the Drier must be replaced. temperature 1. Check the welded parts of the refrigerant. in the freezer drier inlet and outlet and drier compartment.
  • Page 80 Problems Causes Checks Measures Remarks High Cycle pipe is clogged. Check sequence. - Heat up compressor discharging Direr must be replaced. temperature in 1. Check temperature of condenser weld joints with touch, disconnect the freezer manually. the pipes, and check the clogging. compartment.
  • Page 81 2-5. Defrosting failure Problems Causes Checks Measures Remarks No defrosting. Heater does not generate heat as 1. Check the resistance of heater. Heating wire is short and wire is cut. Seal the lead wire with the heating wire is cut or the circuit 0 : Short.
  • Page 82 Problems Causes Checks Measures Remarks No defrosting Melting fuse blows out. - Check melting fuse with tester. - Faullty parts: parts replacement. 1) Lead wire is cut. If 0 : OK. - Check wire color when maeasuring 2) Bad soldering. : wire is cut.
  • Page 83 2-6. Icing Problems Causes Checks Measures Remarks Icing in the 1) Bad circulation of cool air. - Check the food is stored properly - Be acquainted with how to use. - Check the defrost refrigerator - Clogged intake port in the (check discharge and intake port - Sealing on connecting parts.
  • Page 84 Problems Causes Checks Measures Remarks Ice in the freezer 1) Bad cooling air circulation. - Check food storage conditions - Be acquainted with how to use. - Check the parts related compartment. - Intake port is colgged in the freezer visually.(Check clogging at intake - Check defrost (Check ice on the to defrosting if the...
  • Page 85 2-7. Sound Problems Causes Checks Measures Remarks "Whizz" sound 1. Loud sound of compressor 1.1 Check the level of the 1) Maintain horizontal level. operation. refrigerator. 2) Replace rubber and seat if they 1.2 Check the rubber seat are sagged and aged. conditions (sagging and aging).
  • Page 86 Problems Causes Checks Measures Remarks Vibration sound. 1. Vibration of shelves and foods in 1-1. Remove and replace the 1) Reassemble the vibrating parts ("Cluck") the refrigerator. shelves in the refrigerator and insert foam or cushion where 2. Pipes interference and capillary 1-2.
  • Page 87 Problems Causes Checks Measures Remarks Sound "Burping" It happens when refrigerant expands - Check the sound of refrigerant at the - Check the restrainer attached on the (almost the same at the end of capillary tube. initial installation. evaporator and capillary tube weld as animals crying - Check the sound when the refrigerator joints and attach another restrainer.
  • Page 88 2-8. Odor Problems Causes Checks Measures Remarks Food Odor. Food (garlic, kimchi, etc) - Check the food is not wrapped. - Dry deodorizer in the shiny and - Check the shelves or inner windy place. wall are stained with food juice. - Store the food in the closed - Check the food in the vinyl wraps.
  • Page 89 2-9. Micom Problems Symptom Causes Checks Measures Remarks Bad PCB All display Bad connection Bad connector Visual check on connector Reconnect electric power. LEDS are off. between Main PCB connection from main connection. connector. and display circuit. PCB to display PCB. Defective PCB trans.
  • Page 90 Problems Symptom Causes Checks Measures Remarks Bad cooling. Freezer Compressor does Compressor Lead Wire Check compressor Lead Wire Reconnect Lead temperature is not start. is cut. with a tester. Wire. high. Defective compressor Measure voltage at PCB CON5 Replace relay(RY1 Refer to load driving relay.
  • Page 91 Problems Symptom Causes Checks Measures Remarks Bad cooling Wrong Defective AC Damper. Check AC damper Check if AC damper motor and Reconnect lead Refrigerator motor and reed switch reed switch lead wire are wire. temperature. and lead wire are cut. cut with a tester.
  • Page 92 Problems Symptom Causes Checks Measures Remarks Bad defrost. Defrost is not Defrost lead wire is cut. Check if defrost lead wire is cut with a Reconnect Lead working. tester. Wire. Defective defrost driving relay. Check the voltage of CON5 (1 and 7) Replace relay (RY 7 Refer to load with a tester after pressing main and RY 14) or PCB.
  • Page 93 Problems Symptom Causes Checks Measures Remarks Defective Buzzer rings Trouble mode indication. Check trouble diagnosis function. Repair troubles Refer to mode display button. but key does indication in not sense even function button is explanations. pressed. Door Buzzer Buzzer Defective connecting lead wire from Check lead wire associated with door Repair lead wire.

  • Page 94: 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 95 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 96 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 97 TROUBLE DIAGNOSIS 3-4. Practical Work For Heavy Repair Items Precautions 1. Removal of residual Evaporator Low pressure side refrigerant. KEYPOINTING Observe the sequence for Compressor removal of refrigerant. Drier Suction (If not, compressor oil may leak.) High pressure side Release Condenser Refrigent Intake...
  • Page 98 TROUBLE DIAGNOSIS Items Precautions 4.Vacuum degassing. Evaporator Suction pipe Compressor Drier Condenser pressure High Blue pressure Yellow Vaccum Pump KEYPOINTING - 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 99 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 100 TROUBLE DIAGNOSIS 3-6. Brazing Reference Drawings 1) Asia / Middle-East Africa PIPE ASSEMBLY PIPE ASSEMBLY HOT LINE HOT LINE (Refrigerator) (Freezer) Copper(Silver) Copper Brazer Brazer CAPI - TUBE DRIER ASSEMBLY Copper(Silver) Silver Brazer Brazer PIPE ASSEMBLY JOINT PIPE ASSEMBLY SUCTION Copper Brazer PIPE ASSEMBLY...

  • Page 101: 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 102 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 103 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 104 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 105 TROUBLE DIAGNOSIS 4-5. 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 106: 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 then disconnect water forward in arrow B direction.

  • Page 107: Handle

    HOW TO DISASSEMBLE AND ASSEMBLE 2. HANDLE 4) Disassembly of a grille fan (L) : Hold upper part of a grille fan(L) and pull forward carefully. 1) Put blade screwdriver into a groove on the side of a 5) Loosen two screws. Deco handle and lift up a little bit in arrow direction 6) Disassembly of shroud.

  • Page 108: Dispenser

    HOW TO DISASSEMBLE AND ASSEMBLE 5. DISPENSER 4) Loosen four screws with a phillips screwdriver and pull a funnel Assembly to disconnect. 1) Disconnect button assembly by pulling down until it stops and then pulling forward. Funnel Assembly Funnel Assembly Button 5) Duct cap Assembly is disconnected if hold lever connecting screw is loosened with a phillips screwdriver.
  • Page 109 HOW TO DISASSEMBLE AND ASSEMBLE 7) Dispenser Related Parts FRAME ASSEMBLY, DISPLAY COVER, DISPENSER PWB(PCB) ASSEMBLY, DISPLAY FUNNEL ASSEMBLY SWITCH, MICRO FRAME, FUNNEL 10 LEVER(SWITCH) 11 FUNNEL 12 RUBBER, FUNNEL 13 SWITCH, ROCKER 14 SOLENOID ASSEMBLY 15 SPRING 16 HOLDER, LEVER 17 CAP, DUCT 19 LEVER, DISPENSER 20 RUBBER, CAP...

  • Page 110: Water Tank And Water Line

    HOW TO DISASSEMBLE AND ASSEMBLE 7-2. Home Bar parts disassembly and assembly 6. WATER TANK AND WATER LINE 1) Disconnect H/Bar Door Assembly u The water tank at back and lower part of a refrigerator is fixed by one screw and has a capacity containing 7 2) Loosen two screws attached on the refrigerator glasses (180cc per glass) of cold water.

  • Page 111: Exploded View

    EXPLODED VIEW FREEZER DOOR PART: GR-P247, GR-P207, GR-L247, GR-L207, GR-L197 200A 206C 206B 202A 206A 205A 205A 205C 210A 205D 205F 210B 210C 205C 205B 205B 210C 201A 206E 203A - 111 -...
  • Page 112 EXPLODED VIEW FREEZER DOOR PART: GR-C247, GR-C207, GR-B247, GR-B207, GR-B197 200A 206C 206B 202A 205A 206A 205A 205C 210B 205D 205F 210B 210B 205C 205B 205B 210C 210C 201A 206E 203A - 112 -...
  • Page 113 EXPLODED VIEW Ref No. : GR-P247, GR-P207, GR-C247, GR-C207 REFRIGERATOR DOOR PART : Optional part 230A 205A 241A 206D 241B 236A 147C 147B 232A 147A 239A 205F 243A 206B 240A 205A 264B 205C 402B 266A 266C 262A 265A 617A 261A 267A 264C 205B...
  • Page 114 EXPLODED VIEW Ref No. : GR-L247, GR-L207, GR-L197, GR-B247, GR-B207, GR-B197 REFRIGERATOR DOOR PART : Optional part 230A 241A 206D 241B 236A 147C 232A 147B 239A 147A 205A 243A 206B 240A 205A 205C 205F 243A 240A 205D 240C 205B 205C 205B 231A 233A...
  • Page 115 EXPLODED VIEW FREEZER COMPARTMENT : Optional part 131B 101A 270A 131A 271B 120A 271A 137B 137A 131E 131B 131A 136C 403A 402A 136B 136C 131D 135A 136A 131C 152A 120D 132A 400A 120D 302B 401A 128C 130A 120B 128E 128D 120B 128F 120B...
  • Page 116 EXPLODED VIEW REFRIGERATOR COMPARTMENT : Optional part 101B 140A 146A 270B 271B 271C 141A 626C 626B 141B 626A 171A 115A 171B 115B 116A 402A 115C 151A 170A 624C 141D 152A 151C 401A 149C 177A 151B 142A 162A 177B 155A 150A 166C 162B 272B...
  • Page 117 EXPLODED VIEW ICE & WATER PART : Optional part 622A 625A 618A 616E 616F 616G 616D 623A 627A 624B 623A 623B 619A 404A 619A 612A 610A 610A 612C 600A 611A 611B 607A 612B 602A 611C 605A 616C 616A 611A 604A 616A 611D 603B...
  • Page 118 EXPLODED VIEW MACHINE COMPARTMENT : Optional part 406A 502A 410H 410G 505A 303A 500A 303B 502B 304A 303C 303D 313A 300A 310B 307A 307A 317A 301A 317B 104A 308B 306A 309A 309B 305A 403B 305B 310A 309C 305C 308A 308C 305C 305B - 118 -...
  • Page 119 EXPLODED VIEW DISPENSER PART 277A 278A 278C 402C 278B 276A 275A 278F 278E 405A 275D 278D 276B 401C 275C 275B 501A 281A 280C 280B 280A 207A 279A - 119 -...

  • Page 120: Replacement Parts List

    JUL., 2004 Printed in Korea P/No. 3828JD8686S...

This manual is also suitable for:

Gr-p247Gr-p207Gr-l197Gr-l247Gr-l207Gr-c247 ... Show all

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