LG GR-K20SVZ Technical Manual
LG GR-K20SVZ Manual
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LG GR-K20SVZ manual content summary:
- LG GR-K20SVZ | Technical Manual - Page 1
Kimchi Storage SVC Technical Manual CAUTION! Before evaluating or servicing this product, read the safety and operation rules in this manual. MODEL: GR-K16SLQ GR-K18SLQ GR-K20SVZ - LG GR-K20SVZ | Technical Manual - Page 2
from the refrigerator before tilting it during repairs to avoid spills. 7. Refer all repairs of the sealed system to an Authorized servicer who has the appropriate refrigerant recovery equipment. Escaping refrigerant could cause injury, pollute the air, or cause other environmental concern. Contents - LG GR-K20SVZ | Technical Manual - Page 3
means a dangerous condition which could result in significant damage, injury, or death if the instructions are NOT followed. CAUTION means condition which could result in damage or injury if instructions are not followed. Warning Use Caution to prevent electric shock. • The control board (Main - LG GR-K20SVZ | Technical Manual - Page 4
Safety Warnings and Cautions Warning This product should always be grounded. • The product is equipped with a 3-wire grounding cord which should be plugged into a properly wired outlet. If you don't have the proper outlet or are in doubt of the voltage or grounding, we recommend consulting a - LG GR-K20SVZ | Technical Manual - Page 5
shock. During repairs, remove all dust and foreign materials from the work area. • Keeping these areas clean makes work easier and will prevent problems like overheating, fire, and short circuits. Allow time for resetting if you unplug the storage. • If you unplug the storage during repair, wait - LG GR-K20SVZ | Technical Manual - Page 6
.) 92 l (3.25 ft3.) 66 l (2.33 ft3.) 817 mm (32.2 inches) 694 mm (27.3 inches) 878 mm (34.6 inches) 62 kg (137 lbs.) 210 W Direct cooling Manual Defrost Polyurethane Foam 1 6 pcs. 2 pcs. KX56LACH PIPE ON SHEET R134a (135 g) FREOL @15 G (280 cc) P6R8MB 4TM314TFB Ø110 fan adhesion 115 V 80 W 115 V 60 - LG GR-K20SVZ | Technical Manual - Page 7
.) 92 l (3.25 ft3.) 92 l (3.25 ft3.) 921 mm (36.3 inches) 694 mm (27.3 inches) 878 mm (34.6 inches) 67 kg (148 lbs.) 285 W Direct cooling Manual Defrost Polyurethane Foam 1 6 pcs. 2 pcs. KX56LACH PIPE ON SHEET R134a (140 g) FREOL @15 G (280 cc) P6R8MB 4TM314TFB Ø110 fan adhesion 115 V 80 W 115 V 80 - LG GR-K20SVZ | Technical Manual - Page 8
l (4.66 ft3.) 66 l (2.33 ft3.) 970 mm (36.2 inches) 698 mm (27.5 inches) 879 mm (34.61 inches) 70 kg (154 lbs.) 285 W Direct cooling Manual Defrost Polyurethane Foam 1 10 pcs. 2 pcs. KX56LACH PIPE ON SHEET R134a (145 g) FREOL @15 G (280 cc) P6R8MB 4TM314TFB Ø110 fan adhesion 115 V 100 W 115 V 60 - LG GR-K20SVZ | Technical Manual - Page 9
Product Installation Method Chapter 3 Product Installation Method 1. Method to adjust height of storage I Adjust the level of storage. (If the floor is uneven, the storage may vibrate or cause noise.) ➲ Adjust the front to be level by turning the height adjutsment screws under the front corners. - LG GR-K20SVZ | Technical Manual - Page 10
Circuit Diagram Chapter 4 Circuit Diagram 1. GR-K16, K18SLQ (LED MODULE TYPE) 3-WAY VALVE MOTOR PTC STARTER 10 Mechanical Area FAN MOTOR CONDENSATION HEATER LEFT MATURATION HEATER - LG GR-K20SVZ | Technical Manual - Page 11
Circuit Diagram Press and hold the FOOD button and the STORAGE TEMPERATURE button simultaneously. If everything is correct, all LEDs will turn on. If there is a failure, all LEDs EXCEPT the Remaining Maturation Time LED will turn on. Press TEST SWITCH once Press TEST SWITCH at TEST1 once Press TEST - LG GR-K20SVZ | Technical Manual - Page 12
Circuit Diagram 2. GR-K20SVZ (LCD TYPE) 3-WAY VALVE MOTOR PTC STARTER 12 Mechanical Area FAN MOTOR CONDENSATION HEATER LEFT MATURATION HEATER - LG GR-K20SVZ | Technical Manual - Page 13
Circuit Diagram Press and hold the FOOD button and the STORAGE TEMPERATURE button simultaneously. If everything is correct, all LEDs will turn on. If there is a failure, all LEDs EXCEPT the Remaining Maturation Time LED will turn on. Press TEST SWITCH once Press TEST SWITCH at TEST1 once Press TEST - LG GR-K20SVZ | Technical Manual - Page 14
MICOM Function and Description of Circuit Chapter 5 MICOM Function and Description of Circuit 1. Description of Function 1) Display I GR-K16, K18SLQ (LED MODULE) DH DH Temperature setting -0.5°C 2.5°C -2.5°C -18°C -7°C Temperature setting -7°C -0.5°C 2.5°C -2.5°C -18°C I GR-K20SVZ ( - LG GR-K20SVZ | Technical Manual - Page 15
MICOM Function and Description of Circuit 2) Food Storage/Maturation Function (1) Selection of Food Storage Function Press Lock/Unlock to release lock Select Type of Food Select temperature section Press Lock/Unlock button once Wait 60 seconds Cycle Begins 1. Press Lock/Unlock to release the - LG GR-K20SVZ | Technical Manual - Page 16
MICOM Function and Description of Circuit (3) Selection of Power On/Off Function Press Lock/Unlock Press and hold the power button for two seconds Power Off Completion of selection Press the power button Power On Completion of Selection 1. Press Lock/Unlock to release lock. 2. If you press - LG GR-K20SVZ | Technical Manual - Page 17
MICOM Function and Description of Circuit 2. If the temperature in either compartment is unsatisfactory, the compressor is turned on and the 3-way valve is opened to the affected compartment. 3. If the temperature in both compartments is unsatisfactory, the compressor is turned on and runs until - LG GR-K20SVZ | Technical Manual - Page 18
OPEN 3min 3WAY 10sec VALVE COMPR- LEFT ESSOR OPEN ON Temperature of Left and Right sensor is - LG GR-K20SVZ | Technical Manual - Page 19
. 2. The test switch on the PCB operates the test mode. The storage reverts to the normal mode after 2 hours if you forget to end it manually. 3. When the test mode is active, the buttons on the control panel are disabled but the buzzer still sounds a ding if one is pressed. 4. When - LG GR-K20SVZ | Technical Manual - Page 20
MICOM Function and Description of Circuit 2. Description of Circuit 1) Power circuit The power circuit consists of the noise attenuation part and the SMPS (switch mode power supply) part. The SMPS consists of the rectifier (BD1 & CE1) to convert AC voltage to DC voltage, switching part (IC2) to - LG GR-K20SVZ | Technical Manual - Page 21
MICOM Function and Description of Circuit 4) Load/buzzer driving circuit (1) Load driving circuit LED MODULE TYPE GR-K16SLQ, GR-K18SLQ Left Right Condensation-H Condensation-H Right Ripening Heater Left Ripening Heater Type of Load Comp. Fan Motor Measuring Point(IC7) 16 ON State OFF Left - LG GR-K20SVZ | Technical Manual - Page 22
LCD TYPE GR-K20SVZ Left Right Condensation-H Condensation-H Right Ripening Heater Left Ripening Heater Type of Load Comp. Fan Motor Measuring Point(IC7) 10 ON State OFF Left Ripening Heater Right Ripening Heater 12 13 Within 1 V 12V Condensation Heater 15 23 - LG GR-K20SVZ | Technical Manual - Page 23
(2) Buzzer driving circuit State Measuring Part Ding-Dong sounds when a display button is pressed Ding sounds when an incorrect button is pressed OFF 0.05s 0.2s 0.1s 0.5s 0.05s 0.2s IC1 (PIN 50) 5V 5V 5 V 0V 0V 5V IC1 (PIN 51) 0V 5V 0V (Ding) (Dong) (Ding) 5) Switch input - LG GR-K20SVZ | Technical Manual - Page 24
MICOM Function and Description of Circuit 6) Temperature sense circuit The temperature sense circuit consists of a sensor to detect the outside (ambient) temperature and sensors in the left and right compartments for storing/ripening kimchi. The status of each sensor, whether open or shorted, is - LG GR-K20SVZ | Technical Manual - Page 25
MICOM Function and Description of Circuit 7) Stepping Motor Operation Circuit (3-way Valve) LED MODULE TYPE GR-K16SLQ, GR-K18SLQ LCD TYPE GR-K20SVZ ➲ The rotation of the 3-way valve is controlled by the output of pins 40~43 of IC1. Changes in these outputs rotate the valve. Explanation) The stepping - LG GR-K20SVZ | Technical Manual - Page 26
MICOM Function and Description of Circuit 8) Power Failure Compensation Circuit ➲ The power failure compensation circuit recalls the temperature range of the right and left compartments and maintains these levels if power is interrupted briefly. Temperature setting information is delivered to 1C9 - LG GR-K20SVZ | Technical Manual - Page 27
MICOM Function and Description of Circuit 9) Keeping temperature compensation and too cold/too warm cut compensation circuit (1) Keeping temperature compensation LED MODULE TYPE GR-K16SLQ, GR-K18SLQ LCD TYPE GR-K20SVZ LEFT STORAGE TEMPERATURE COMPENSATION RIGHT STORAGE TEMPERATURE COMPENSATION - LG GR-K20SVZ | Technical Manual - Page 28
MICOM Function and Description of Circuit Example) If you change the resistance of compensation at the left compartment (RCL) from 10KΩ to 18KΩ, the storage temperature in the left compartment will be increased by 1°C. Modification Division Current 470 Ω 470 Ω No change 2 KΩ 0.5° C DOWN Left - LG GR-K20SVZ | Technical Manual - Page 29
value +1° C -1° C 0° C 0° C (When shipping from factory) ➲ The cut compensation circuit compensates the keeping temperature of the left or right compartment by simply cutting it out of service for a brief period. 30 - LG GR-K20SVZ | Technical Manual - Page 30
MICOM Function and Description of Circuit 10) Button input and display part illumination circuit (LED MODULE TYPE) ➲ The above circuit determines which buttons are pressed and drives the LED display, whose driving method is a scan method. 31 - LG GR-K20SVZ | Technical Manual - Page 31
MICOM Function and Description of Circuit 11) Communication circuit between Main PCB and Display PCB (LCD type only.) This circuit provides communication between the MICOM on the MAIN PCB and the MICOM of the DISPLAY PCB and controls the LCD. If there is no communication between these boards for 30 - LG GR-K20SVZ | Technical Manual - Page 32
MICOM Function and Description of Circuit 3. Sensor Resistance Characteristics Table Measuring Temperature(°C) -20° C -15° C -10° C -5° C 0° C +5° C +10° C +15° C +20° C +25° C +30° C +40° C +50° C Left Sensor, Right Sensor 77 KΩ 60 KΩ 47.3 KΩ 38.4 KΩ 30 KΩ 24.1 KΩ 19.5 KΩ 15.9 KΩ 13 KΩ 11 KΩ 8.9 - LG GR-K20SVZ | Technical Manual - Page 33
MICOM Function and Description of Circuit 4. PCB Parts Drawing and List 1) LED MODULE TYPE MODEL (GR-K16,18SLQ) (1) Parts Drawing of MAIN PCB Assembly 34 - LG GR-K20SVZ | Technical Manual - Page 34
MICOM Function and Description of Circuit I Parts List 35 - LG GR-K20SVZ | Technical Manual - Page 35
MICOM Function and Description of Circuit (2) Parts Drawing of DISPLAY PCB Assembly and Parts List 36 - LG GR-K20SVZ | Technical Manual - Page 36
MICOM Function and Description of Circuit 2) LCD TYPE MODEL (GR-K20SVZ) (1) Parts Drawing of MAIN PCB Assembly 37 - LG GR-K20SVZ | Technical Manual - Page 37
MICOM Function and Description of Circuit I Parts List 38 - LG GR-K20SVZ | Technical Manual - Page 38
MICOM Function and Description of Circuit (2) Parts Drawing of DISPLAY PCB Assembly and Parts List I Parts List 39 - LG GR-K20SVZ | Technical Manual - Page 39
MICOM Function and Description of Circuit 5. PCB Circuit drawing 1) LED MODULE TYPE MODEL (GR-K13,16,18SLQ) (1) PCB Circuit Drawing Left Right Condensation-H Condensation-H Right Ripening-H Left Ripening-H R1-SENSOR (Left Sensor) R2-SENSOR Right Sensor Temperature Compensation1 Left Right - LG GR-K20SVZ | Technical Manual - Page 40
Power Lock Select Select Rlpening Left Comp. Unlock Foods Temperature Cycle Flavar Keeping Power Lock Select Select Rlpening Right Comp. Unlock Foods Temperature Cycle Flavar Keeping 41 - LG GR-K20SVZ | Technical Manual - Page 41
MICOM Function and Description of Circuit 2) LCD MODULE TYPE MODEL (GR-K20SVZ) (1) PCB Circuit Drawing Left Right Condensation-H Condensation-H Right Ripening-H Left Ripening-H R1-SENSOR (Left Sensor) R2-SENSOR Right Sensor Temperature Compensation1 Left Resistance Value Right Remarks warmer - LG GR-K20SVZ | Technical Manual - Page 42
43 - LG GR-K20SVZ | Technical Manual - Page 43
MICOM Function and Description of Circuit (2) DISPLAY PCB Assembly 44 - LG GR-K20SVZ | Technical Manual - Page 44
Warnings For Disassembling Product Chapter 6 Warnings For Disassembling Product 1. Main PCB Assembly • When removing the Main PCB from the storage, disassemble it carefully and do not let the lead wires touch any part of the PCB. • There is danger of a short as a lead wire is broken or cover is - LG GR-K20SVZ | Technical Manual - Page 45
Exploded View and Parts List Chapter 7 Exploded View and Parts List 1) Exploded View I GR-K16SLQ 220A 281H 200A 232A 128E 223A 203A 420B 604A 501A 502B 323B 310B 231A 128D 281D 222A 223B 210A 128D 281G 220B 221A 203B 319C 420A 317A 327A 619B 329C 307A 314A 308A 128E 420B 281E - LG GR-K20SVZ | Technical Manual - Page 46
Exploded View and Parts List 248D 147C 147A 249G 249F 249D 249B 249C 270A 250A 251A 248A 148C 148B 148A 407B 407A 408A 102A 47 - LG GR-K20SVZ | Technical Manual - Page 47
Exploded View and Parts List I GR-K18SLQ 281H 200A 222A 128E 223A 220A 203A 420B 604A 501A 502B 323B 310B 221A 128D 281D 222A 223A 210A 128D 281G 220A 221A 317A 319C 420A 203A 329C 128E 420B 618A 281E 604A 327A 619B 307A 314A 308A 411A 309A 312A 310A 304A 619A 315D 315A - LG GR-K20SVZ | Technical Manual - Page 48
Exploded View and Parts List 248D 147C 147A 249G 249F 249D 249B 249C 270A 250A 251A 248A 407A 408A 407B 102A 49 - LG GR-K20SVZ | Technical Manual - Page 49
Exploded View and Parts List I GR-K20SVZ 281H 200A 232A 128E 223A 220A 203A 420B 604A 501A 502B 323B 310B 231A 128D 281D 222A 223B 210A 128D 281G 220B 221A 203B 319C 420A 317A 327A 619B 329C 307A 314A 308A 128E 420B 281E 618A 604A 411A 309A 312A 310A 304A 619A 315D 315A - LG GR-K20SVZ | Technical Manual - Page 50
Exploded View and Parts List 148C 148B 148A 249G 249F 249D 249B 249C 248A 250A 270A 407A 408A 407B 102A 51 - LG GR-K20SVZ | Technical Manual - Page 51
Service Parts List s GR-K16SLQ Location No. 102A 128D 128E 148A 148B 148C 147A 147C 248D 200A 203A 203B 210A 220A 220B 221A 222A 231A 232A 223A 223B 248A 249B 249C 249D 249F 249G 250A 251A 270A 281D 281E 281G 281H 304A Description REF' SET SUPPORTER PWB ASSY,DISPLAY(L) SUPPORTER,PWB DECO, CONTROL - LG GR-K20SVZ | Technical Manual - Page 52
Exploded View and Parts List Location No. 307A 308A 309A 310A 310B 312A 314A 315A 315B 315C 315D 317A 319C 323B 327A 329C 407A 407B 408A 411A 420A 420B 501A 502B 604A 618A 619A 619B Description RE-COMPRESSOR,ASSY P.T.C OLP COVER, PTC JOINT PIPE ASSY RUBBER,SEAT STOPPER COMP BASE ASSY ROLLER PIN - LG GR-K20SVZ | Technical Manual - Page 53
307A 308A 309A 310A 310B 312A 314A 315A 315B Description REF' SET SUPPORTER ASSEMBLY LEG BUSH,HINGE BUSH,HINGE BANK COVER ASSY, BANK BANK ASSY DOOR ) HANDLE,CH BASKET(INNER) BASKET(SMALL) COVER,MAGIC ROOM PWB ASSY,DISPLAY(L) SUPPORTER,PWB DECO, CONTROL CAP,HINGE(RL) CAP HINGE ASSY CAP,HINGE(LR) CAP - LG GR-K20SVZ | Technical Manual - Page 54
Exploded View and Parts List Location No. 315C 315D 317A 319C 323B 327A 329C 407A 407B 408A 411A 420A 420B 501A 502B 604A 618A 619A 619B Description PIN BARRIER ASSY, BOTTOM DRIER ASSY BRACKET,MOTOR WIRE COND' ASSY RUBBER,MOTOR-N FAN ASSY CAPACITOR,R CAPACITOR (M/S) HOLDER CAPACITOR POWER CORD - LG GR-K20SVZ | Technical Manual - Page 55
223A 223B 231A 232A 248A 250A 249B 249D 249F 249G 249C 270A 281D 281E 281G 281H 304A 307A 308A 309A 310A 310B Description REF' SET SUPPORTER ASSEMBLY LEG BUSH,HINGE BUSH,HINGE BANK,SIDE DISH COVER ASSY BANK BANK ASSY DOOR FOAM ASSY,L GASKET ASSY,DOOR GASKET ASSY,DOOR DOOR FOAM - LG GR-K20SVZ | Technical Manual - Page 56
Exploded View and Parts List Location No. 312A 314A 315A 315B 315C 315D 317A 319C 323B 327A 329C 407A 407B 408A 411A 420A 420B 501A 502B 604A 618A 619A 619B Description RUBBER,SEAT STOPPER COMP BASE ASSY ROLLER PIN BARRIER ASSY, BOTTOM DRIER ASSY BRACKET,MOTOR WIRE COND' ASSY RUBBER,MOTOR-N FAN - LG GR-K20SVZ | Technical Manual - Page 57
Memo 58 - LG GR-K20SVZ | Technical Manual - Page 58
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MODEL: GR-K16SLQ
GR-K18SLQ
GR-K20SVZ
CAUTION!
Before evaluating or servicing this product,
read the safety and operation rules in this manual.
Kimchi Storage
SVC Technical Manual