LG GR-359 Service Manual Download

Page: 29 / 41

3. SENSOR RESISTANCE CHARACTERISTICS TABLE

• The tolerance of sensor resistance is ±5%.

• Be sure to measure the sensor resistance after keeping the sensor more than 3 minutes at a measuring temperature.

(It needs delay due to sensor speed.)

• Measure the resistances of SENSORs with a digital tester after disconnecting CON 3 of MAIN PWB ASSY.

- 29 -

MEASURED TEMPERATURE

RESISTANCE OF FREEZER SENSOR

RESISTANCE OF DEFROST SENSOR, ROOM TEMPERATURE SENSOR

-20°C

22.3k

Ω

77k

Ω

-15°C

16.9k

Ω

60k

Ω

-10°C

13.0k

Ω

47.3k

Ω

-5°C

10.1k

Ω

38.4k

Ω

0°C

7.8k

Ω

30k

Ω

+5°C

6.2k

Ω

24.1k

Ω

+10°C

4.9k

Ω

19.5k

Ω

+15°C

3.9k

Ω

15.9k

Ω

+20°C

3.1k

Ω

13k

Ω

+25°C

2.5k

Ω

11k

Ω

+30°C

2.0k

Ω

8.9k

Ω

+40°C

1.4k

Ω

6.2k

Ω

+50°C

0.8k

Ω

4.3k

Ω

Summary of Contents for GR-359

Page 1: ...CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL GR 359 399 REFRIGERATOR SERVICE MANUAL ...

Page 2: ...iance check regular current voltage and capacity 5 Don t touch metal products in the freezer with wet hands This may cause frostbite 6 Prevent water from following onto electric elements in the mechanical parts 7 When standing up after having checked the lower section of the refrigerator with the upper door open move with care to avoid hitting the upper door 8 When tilting the set remove any mater...

Page 3: ... 17 ASSEMBLY JAWS BOLT TOOL TUBE LOKRING LOKRING JOINT Figure 23 LOKRING Figure 24 LOKRING TOOL ...

Page 4: ...running After the refrigerant R600a is completely discharged repair any defective parts and replace the dryer At any case you must use the LOKRING for connecting or replacing any part in the cycle No Fire No Welding Connect the Schrader valve to pump with the coupler And then turn the pump on for vacuum state Figure 3 Let the pump run until the low pressure gauge indicates the vacuum gauge pressur...

Page 5: ...TC Starting Type EVAPORATOR Fin Tube Type CONDENSER Side Wire Condenser SPECIFICATIONS 4 Optional Parts ITEMS SPECIFICATIONS DIMENSIONS mm 595 W X626 D X1710 H NET WEIGHT kg 69 COOLING SYSTEM Fan Cooling REFRIGERATOR Knob Dial FREEZER Button Full Automatic DEFROSTING SYSTEM Heater Defrost DOOR FINISH Pre Coated Metal OUT CASE Painted Steel Sheet INNER CASE ABS INSULATION Polyurethane Foam DEFROSTI...

Page 6: ...r movable Bottle Holder 2LBottle Door Basket Leveling Screw Egg Tray 1 or 2 Freezer Temperature Control Removable Glass Shelf 2 or 3 Lamp Multi air Flow Duct Fresh Meat Keeper Optional Refrigerator Temperature Control Vegetable Drawer Used to keep fruits and vegetables etc fresh and crisp Ice Cube Tray Freezer Compartment Removable Plinth ...

Page 7: ...ve lower cover and move cap lower cover And seperate screw lower hinge and remove pin Separating the freezer door in opening and more the position the cap Move the position of bracket door and screw 2 Separating screw and remove the center hinge and the refrigerator door Move the position of cap Move the position of bracket door and screw 3 Move the position of upper hinge pin and cap Assemble the...

Page 8: ... out the Door Gasket to remove from the Door Foam Assy R 2 DOOR SWITCH 1 Loosen four screws in upper part and disconnect top cover 2 Disconnect Lead Wire from switch 3 Disengage hook behind the switch by pressing it with hands 3 REFRIGERATOR ROOM LAMP 1 Remove the Cover Lamp R by pulling with a type driver 2 Remove the Lamp by turning 3 After removing the lamp you must check the O RING which is ma...

Page 9: ...AMPER CONTROL 1 Remove the Cover Lamp R and loosen 2 screw 2 Pull the Control Box R and separate the lead wire housing 3 Remove the Cover Lamp R 4 Separate the Insulation Multi Duct and Control Box R 5 Disassemble the Knob 6 Separate the Damper Control and Control Box R 7 Separate the Damper Control and Resistor 8 Disconnect the lead wire 7 HEATER SHEATH HEATER CORD L In this refrigerator Heater S...

Page 10: ... the single phase induction motor in the starting operation flows in both main coil and sub coil After the starting is over the current in subcoil is cut off The proper features of PTC play all the above roles So PTC is used as a motor starting device 3 PTC Applied Circuit Diagram According to Starting Method for the Motor 4 Motor Restarting and PTC Cooling 1 For restarting after power off during ...

Page 11: ...CIRCUIT DIAGRAM 10 NOTE 1 This is a basic diagram and specifications vary in different localities ...

Page 12: ... a regular Trans Replace Compressor OLP works within 30 sec in forcible OLP operation by turning instant power on and off Components start in the voltage of Rating Voltage 10 below Applied voltage isn t in the range of Rating Voltage 10 Check the resistance among M C S C and M S in Motor Compressor Check the resistance of two terminals in PTC Starter Check if applying a regular OLP Measure minimum...

Page 13: ...idge Figure 21 Separate the Relay Assy from the Compressor and check the resistance value between two terminals of OLP with a Tester Figure 22 Observation value is 220V 50Hz 22Ω 30 115V 60Hz 6 8Ω 30 240V 50Hz 33Ω 30 127 220V 60Hz 22Ω 30 The resistance value is 0 or serveral hundreds Ω The value is Check another electric components Replace Relay Assy Check another electric components Replace Relay ...

Page 14: ... component Raise the voltage Replace each component Cause Check if current flows to starting devices Check current flowing in sub coil of Compressor Check capacity of OLP The items described above are normal Cooling ability is poor Fan motor doesn t run Much frost are sticked to the EVAPORATOR Poor contacting Coil is shorted Shorted Replace the Heater Sheath Replace the Heater Cord L Defect on Hea...

Page 15: ...en and close the set often or check if the door is closed up it firmly Dew forms Check if ambient temperature and humidity Wipe dew with a dry cloth This occurrence in the Exterior Case of surroumcling air are high is solved naturally in low temperature and humidity Is there gap in the door packed Fill up the gap Abnormal Are the set positioned in a firm and even place Adjust the Adjust Screw and ...

Page 16: ...ature Normal cooling is possible don t cool formed when injecting of Refrigerant normally the regular amount PARTIAL Freeze room and Flowing sound of Refrigerant A little high Normal discharging of CLOG Refrigerator is heard and frost forms more than refrigerant don t cool in inlet only ambient The capillary tube is faulty normally temperature WHOLE Freezer room and Flowing sound of Refrigerant Eq...

Page 17: ...the drier in a outdoors because ASM 1 after unpacking humidity damages to it 2 Keep the unpacked drier at the temperature of 80 100 C VACUUM 1 When measuring with pirant Vacuum Apply M C Vacuum Gauge without fail 1 gauge the charging M C vacuum Perform vacuum operation until a proper 1 degree is within 1 Torr vacuum degree is built up 2 If the vacuum degree of the cycle inside is If a proper vacuu...

Page 18: ...NG time is below 90 minutes defrost and then operate the QUICK FREEZING for the remaining time When the QUICK FREEZING time is over 90 minutes defrost and then operate the QUICK FREEZING for 2 hours 3 If QUICK FREEZE button is pressed during defrosting the QUICK FREEZE LED is lit up But the QUICK FREEZING operates for 3 hours after 7 minutes from the end of defrosting 4 If VACATION button is press...

Page 19: ...7 minutes the operation for the freezing is started But if DEFROST SENSOR is not reach to 7 C after 2 hours operation of the defrosting heater it represents a defrosting trouble See the TROUBLE REPRESENTING FUNCTION 4 If DEFROST SENSOR is short or open defrosting is not performed 7 ORDERLY OPERATION OF ELECTRIC PARTS To avoid NOISE and DAMAGE the items containing an electric parts such as COMP DEF...

Page 20: ...ROST HEATER 1 FREEZER FREEZER SENSOR open SENSOR abnormal or short O O 2 DEFROST DEFROST SENSOR open SENSOR abnormal or short O O No defrosting 3 DEFROSTING DEFROST HEATER FUNCTION TEMP FUSE open or is abnormal disconnection Displayed after at least 4 hours O O O from the trouble s occurring 4 RT SENSOR NOTE 1 Room Temperature abnormal SENSOR open or short O O O 20 VACATION FREEZE TEMP QUICK FREEZ...

Page 21: ...hed during ERROR CODE TEST FUNCTION is not operated MODE OPERATION CONTENTS REMARKS TEST 1 Press TEST button 1 COMP OPERATES SUCCESSIVELY once 2 FAN OPERATES SUCCESSIVELY 3 DEFROSTING HEATER OFF 4 ALL DISPLAY LEDS ON TEST 2 Press TEST button 1 COMP OFF If DEFROST HEATER once in the state of 2 FAN OFF is over 7 C it returns TEST MODE 1 3 DEFROST HEATER ON to the NORMAL STATE 4 ALL THE DISPLAY LEDS ...

Page 22: ...1 to transmit and receive an information and BASIC TIME for calculating time Use a proper form for OSC 1 Because in case that SPECIFICATION is changed the calculated time in IC1 is changed or IC1 isn t able to operate 3 RESET CIRCUIT All the internal parts of MICOM IC1 return to the initial condition when the early power ON or apply power again in MICOM after temporary power failure As a result al...

Page 23: ...pe DOOR S W R of NOT MICOM MODEL it s logic of the A B of DOOR S W R is reversed Even though LAMP R is operated a normal ON OFF according to DOOR S W R but the MICOM couldn t detect a DOOR R opened or closed of lead wire of the A B is abnormal or S W of the A B of DOOR S W R is abnormal When DOOR R open isn t detected Even though DOOR R is opened FAN MOTOR couldn t stop When DOOR R close isn t det...

Page 24: ...K 24 DISPLAY FUNCTION BUTTON RING DOOR OPEN ALARM DING DONG SCREECHING OFF IC1 No 23 Pin ov IC1 No 22 Pin ov MEASURING POINT CONDITIONS 0 05s 0 2s 0 1s 1s 0V 5V 0V 5V 0V 5V 0V 5V 0 5s 0 5s 2 66khz DING 2 232khz DONG 3 1khz OFF ...

Page 25: ...COM IC1 OPEN or SHORT state of each SENSOR is as follows 6 SWITCH INPUT CIRCUIT The following circuit is a test switch input circuit for checking the refrigerator 25 A B C SENSOR CHECK POINT NORMAL 30 C 50 C SHORT OPEN ROOM TEMPERATURE SENSOR POINT A Voltage DEFROST SENSOR POINT B Voltage 0 5V 4 5V 0V 5V FREEZER SENSOR POINT C Voltage ...

Page 26: ...reezer compartment is changed from 10K present resistance to 18K revised resistance the temp of freezer compartment goes up by 2 C 26 FREEZER ROOM RESISTANCE VALUES R1 TEMPERATURE COMPENSATION REMARKS 180 kΩ 5 0 C COMPENSATE WARMLY 56 kΩ 4 0 C 33 kΩ 3 0 C 18 kΩ 2 0 C 12 kΩ 1 0 C 10 kΩ 0 C STANDARD 8 2 kΩ 1 0 C 5 6 kΩ 2 0 C 3 3 kΩ 3 0 C 2 kΩ 4 0 C 470 Ω 5 0 C COMPENSATE COOLLY ...

Page 27: ...5 C 6 C 7 C 8 C 9 C 2kΩ COMPENSATE 2 C 1 C NOT 1 C 2 C 3 C 4 C 5 C 6 C 7 C 8 C 3 3kΩ COMPENSATE 3 C 2 C 1 C NOT 1 C 2 C 3 C 4 C 5 C 6 C 7 C 5 6kΩ COMPENSATE 4 C 3 C 2 C 1 C NOT 1 C 2 C 3 C 4 C 5 C 6 C 8 2kΩ COMPENSATE FREEZER 5 C 4 C 3 C 2 C 1 C NOT 1 C 2 C 3 C 4 C 5 C ROOM 10kΩ COMPENSATE R1 6 C 5 C 4 C 3 C 2 C 1 C NOT 1 C 2 C 3 C 4 C 12kΩ COMPENSATE 7 C 6 C 5 C 4 C 3 C 2 C 1 C NOT 1 C 2 C 3 C 18...

Page 28: ... LIGHTING CIRCUITS OF KEY BUTTON INPUT AND DISPLAY PARTS The above circuit is to judge the operation conditions of function key and to light each function indicating LED It is operated by SCAN method 28 ...

Page 29: ...ed Measure the resistances of SENSORs with a digital tester after disconnecting CON 3 of MAIN PWB ASSY 29 MEASUREDTEMPERATURE RESISTANCE OF FREEZER SENSOR RESISTANCE OF DEFROST SENSOR ROOM TEMPERATURE SENSOR 20 C 22 3kΩ 77kΩ 15 C 16 9kΩ 60kΩ 10 C 13 0kΩ 47 3kΩ 5 C 10 1kΩ 38 4kΩ 0 C 7 8kΩ 30kΩ 5 C 6 2kΩ 24 1kΩ 10 C 4 9kΩ 19 5kΩ 15 C 3 9kΩ 15 9kΩ 20 C 3 1kΩ 13kΩ 25 C 2 5kΩ 11kΩ 30 C 2 0kΩ 8 9kΩ 40 C...

Page 30: ... CC5 6871JB1037 STICKER J02 R3 Q5 R18 J07 J06 J05 RF3 CC6 R14 R11 J10 J03 J08 R4 BUZZER OSC1 RF2 R1 R10 IC1 R12 R13 6 1 R DOOR F D CON3 R19 R6 CC4 CC10 R15 R16 CC8 CC7 RT 9 1 CON2 COMP L FAN HEATER1 HEATER2 CON1 VA1 RY2 RY3 RY1 D9 D10 J11 D6 D7 D8 IC4 R7 RF1 Q4 Q7 Q6 Q3 Q2 Q1 D5 IC6 TRANS D1 D2 D3 D4 IC2 TEST R17 R20 R21 OP1 OP2 ...

Page 31: ...2 REPLACEMENT PARTS LIST 31 ...

Page 32: ...3 PWB ASS Y DISPLAY AND PARTS LIST 32 ...

Page 33: ...5 PWB circuit drawing The PWB circuit drawing may change without notice 33 ...

Page 34: ... 34 ...

Page 35: ...EMENT PARTS LIST 35 503B 406B 114A 102B 109C 102A 120D 120B 120E 501A 120C 120A 282B 283B 104C 106B 104A 109A 109B 103C 5300AJ 401A 104C 106B 104A 315A 315B 315C 315B 315C 319A 319C 328A 327A 420A 329C 323B 314A 312A 317A 307A 318A 105A 304A 411A 404A 405A 329A 332A 409B 405C 281B 281F 407B 610E 108A 604F 120H 310A 4860 6921 330B RING 103A 103B ...

Page 36: ... 36 136E 136E 136E 136F 145C 155A 140A 151A 151B 241A 235A 249C 241A 249A 237A 241C 136A 125A 136B 136C 136D 233A 231A 210A 210A 249B 230A 203A 201A 200A 281D OPTIONAL ...

Page 37: ...A 120C 120A 282B 283B 104C 106B 104A 109A 109B 103C 401A 104C 106B 104A 315A 315B 315C 315B 315C 319A 319C 328A 327A 420A 329C 323B 310A 314A 312A 317A 307A 318A 105A 304A 411A 404A 405A 329A 332A 409B 330B 405C 281B 281F 610E 108A 604F 120H 4860 6921 5300AJ RING 407B 103A 103B ...

Page 38: ... 38 151A 151B 136E 136E 136F 155A 140A 241A 235A 249C 241A 249A 237A 241C 136A 125A 136B 136C 136D 233A 231A 210A 210A 249B 230A 203A 201A 200A 281D OPTIONAL 145C ...

Page 39: ...LY DRAWER R 136D 3391JQ2011D TRAY ASSEMBLY DRAWER R 136E 5027JQ2006A SHELF ASSEMBLY R R 136F 5027JQ2007A SHELF ASSEMBLY R R 140A 3390JS1013A TRAY MEAT R 145C 4974JA2040A GUIDE RAIL R 151A 3391JA2015B TRAY ASSEMBLY VEGETABLE R 151B 3391JA2015A TRAY ASSEMBLY VEGETABLE R 155A 3551JQ2013A COVER ASSEMBLY T V R 201A 5433JQ2003L DOOR FOAM ASSEMBLY F R 203A 4987JQ1012A GASKET ASSEMBLY DOOR R 210A 4810JQ30...

Page 40: ...G R 329A 5901JQ1003A FAN ASSEMBLY R 329C 5901JQ1004A FAN ASSEMBLY R 330B 4999JQ2001A SHROUD ASSEMBLY F R 332A 3531JQ2001A GRILLE ASSEMBLY FAN R 404A 4680JR1009F MOTOR MECH COOLING R 405A 4810JQ3021A BRACKET MOTOR R 405C 5040JQ3003A RUBBER MOTOR N R 406B 6600JR1002C SWITCH PUSH PS102 PARK ELEC 125 250VAC 0 5A R 407A 5300JR1009B HEATER SHEATH 240V 170W 6 6 R 407B 0CZZJB2003B CAPACITOR DRAWING R 409B...

Page 41: ...P No 3828JS8027F ...

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