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LG GR-K20SVZ Technical Manual

Kimchi storage
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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

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  Summary of Contents for LG GR-K20SVZ

  • 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...
  • Page 2: Table Of Contents

    Safety Regulations 1. Make certain the storage does not present and electrical hazard. 2. Always unplug the storage before repairing it. 3. When testing the storage with the power on, use insulated gloves for safety. 4. Make certain instruments, such as a volt meter, are set for the appropriate voltage range.
  • Page 3: Safety Warnings And Cautions

    Safety Warnings and Cautions Chapter 1 Safety Warnings and Cautions Chapter 1 I Always observe SAFETY WARNINGS and CAUTIONS, which are intended to ensure safety while repairing or operating the product. I Hazards are separated into Warnings and Cautions, as explained below. WARNING means a dangerous condition which could result in significant Warning damage, injury, or death if the instructions are NOT followed.
  • Page 4 Safety Warnings and Cautions Warning This product should always be grounded. Do not store flammable liquids or gases in the storage. • The product is equipped with a 3-wire grounding cord which should be plugged into a • Storing gasoline, ether, benzene, alcohol, etc. properly wired outlet.
  • Page 5 Safety Warnings and Cautions Caution Do not place bottles or cans in the storage. Always use exact replacement parts. • There is a possibility they could freeze, causing • Make certain replacement parts are the correct the container to burst. This could present a part by part number and model number.
  • Page 6: Product Specifications

    Specifications Chapter 2 Product Specifications Chapter 2 1. GR-K16SLQ ITEM SPEC Usable Volume l (5.58 ft Volume Left compartment 92 l (3.25 ft Right compartment 66 l (2.33 ft 817 mm (32.2 inches) Width Outside Depth 694 mm (27.3 inches) Dimensions Height 878 mm (34.6 inches)
  • Page 7 Specifications 2. GR-K18SLQ ITEM SPEC Usable Volume 184 l (6.50 ft Volume 92 l (3.25 ft Left compartment Right compartment 92 l (3.25 ft 921 mm (36.3 inches) Width Outside Depth 694 mm (27.3 inches) Dimensions 878 mm (34.6 inches) Height Total weight 67 kg (148 lbs.)
  • Page 8 Specifications 3. GR-K20SVZ ITEM SPEC Usable Volume 198 l (6.99 ft Volume Left compartment 132 l (4.66 ft Right compartment 66 l (2.33 ft 970 mm (36.2 inches) Width Outside Depth 698 mm (27.5 inches) Dimensions Height 879 mm (34.61 inches) Total weight 70 kg (154 lbs.)
  • Page 9: Product Installation Method

    Product Installation Method Chapter 3 Product Installation Method Chapter 3 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. Tilting the unit backward slightly to take the weight off the adjusting screws may make this task easier.
  • Page 10: Circuit Diagram

    Circuit Diagram Chapter 4 Circuit Diagram Chapter 4 1. GR-K16, K18SLQ (LED MODULE TYPE) 3-WAY VALVE MOTOR STARTER...
  • 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...
  • Page 12 Circuit Diagram 2. GR-K20SVZ (LCD TYPE) 3-WAY VALVE MOTOR STARTER...
  • 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...
  • Page 14: Micom Function And Description Of Circuit

    1) Display I GR-K16, K18SLQ (LED MODULE) Temperature Temperature -0.5°C 2.5°C -2.5°C -18°C -7°C -7°C -0.5°C 2.5°C -2.5°C -18°C setting setting I GR-K20SVZ (LCD) Left Right Power Power Compartment Compartment Lock/ Lock/ Lock Unlock Lock Unlock Unlock Unlock Flavor Keeping...
  • Page 15 MICOM Function and Description of Circuit 2) Food Storage/Maturation Function (1) Selection of Food Storage Function Press Select Press Select Type Lock/Unlock temperature Lock/Unlock of Food to release lock section button once Cycle Begins Wait 60 seconds 1. Press Lock/Unlock to release the lock. 2.
  • Page 16 MICOM Function and Description of Circuit (3) Selection of Power On/Off Function Press and hold Power Off Power On Press the power Press the Completion of Completion of button for two Lock/Unlock power button Selection selection seconds 1. Press Lock/Unlock to release lock. 2.
  • 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 both compartments become satisfactory.
  • Page 18 MICOM Function and Description of Circuit 7) Operation in Response to Ambient Temperature The storage senses the ambient temperature and adjusts the temperature in the compartments accordingly. This keeps the storage from being too cold or too warm because of seasonal variations and maintains exact temperatures in the compartments.
  • Page 19 MICOM Function and Description of Circuit 10) Test Mode 1. The test function checks the functions of the PCB and the storage, searching for failure indications. 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.
  • 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 switch the converted DC voltage, transformer to transmit energy of the first side of the switching end to the second side, the secondary power to supply power to MICOM and IC, and the feedback part (IC3, ZD1) to feedback the secondary voltage to the first side of transformer in order to...
  • 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 Left Ripening Right Ripening Condensation Type of Load Comp. Fan Motor Heater Heater Heater...
  • Page 22 LCD TYPE GR-K20SVZ Left Right Condensation-H Condensation-H Right Ripening Heater Left Ripening Heater Left Ripening Right Ripening Condensation Type of Load Comp. Fan Motor Heater Heater Heater Measuring Point(IC7) Within 1 V State...
  • Page 23 Ding-Dong sounds when a display button is pressed Measuring Part pressed 0.05s 0.2s 0.1s 0.5s 0.05s 0.2s IC1 (PIN 50) IC1 (PIN 51) (Ding) (Dong) (Ding) 5) Switch input circuit The switch input circuit detects the test switch signal. LED MODULE TYPE LCD TYPE GR-K16SLQ, GR-K18SLQ GR-K20SVZ...
  • Page 24 LED MODULE TYPE GR-K16SLQ, GR-K18SLQ R1-SENSOR (LEFT SENSOR) R2-SENSOR (RIGHT SENSOR) RT-SENSOR (OUTSIDE SENSOR) LCD TYPE GR-K20SVZ R1-SENSOR (LEFT SENSOR) R2-SENSOR (RIGHT SENSOR) RT-SENSOR (OUTSIDE SENSOR) Sensor Checkpoint Normal (-50° C~+80° C) Shorted...
  • Page 25 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 motor is driven by lC8. Signals are transmitted via lC8 as the motor driving IC.
  • 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 via its serial interface with the microprocessor 1C1. If the power failure compensation does not work, replace 1C9.
  • 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 LCD TYPE GR-K16SLQ, GR-K18SLQ GR-K20SVZ LEFT STORAGE LEFT STORAGE TEMPERATURE COMPENSATION TEMPERATURE COMPENSATION RIGHT STORAGE RIGHT STORAGE...
  • 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 470 Ω Division 2 KΩ 3.3 KΩ...
  • Page 29 MICOM Function and Description of Circuit (2) Too cold/too warm cut compensation LED MODULE TYPE LCD TYPE GR-K16SLQ, GR-K18SLQ GR-K20SVZ Left compartment cut compensation Left compartment keeping temperature Too cold compensation Too warm compensation compensation value JCL1 JCL2 +1° C -1°...
  • 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.
  • 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 seconds, a communication error occurs.
  • Page 32: Sensor Resistance Characteristics Table

    MICOM Function and Description of Circuit 3. Sensor Resistance Characteristics Table Measuring Temperature(°C) Left Sensor, Right Sensor -20° C 77 KΩ -15° C 60 KΩ -10° C 47.3 KΩ -5° C 38.4 KΩ 0° C 30 KΩ +5° C 24.1 KΩ +10°...
  • 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...
  • Page 34 MICOM Function and Description of Circuit I Parts List...
  • Page 35 MICOM Function and Description of Circuit (2) Parts Drawing of DISPLAY PCB Assembly and Parts List...
  • Page 36 MICOM Function and Description of Circuit 2) LCD TYPE MODEL (GR-K20SVZ) (1) Parts Drawing of MAIN PCB Assembly...
  • Page 37 MICOM Function and Description of Circuit I Parts List...
  • Page 38 MICOM Function and Description of Circuit (2) Parts Drawing of DISPLAY PCB Assembly and Parts List I Parts List...
  • 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 Right Left Condensation-H Condensation-H Right Ripening-H Left Ripening-H R1-SENSOR (Left Sensor) R2-SENSOR Right Sensor Temperature Compensation1 Left Right Remarks Resistance Value warmer Remarks cooler...
  • Page 40 Select Rlpening Left Comp. Power Lock Select Temperature Unlock Foods Cycle Flavar Keeping Lock Select Select Rlpening Right Comp. Power Temperature Unlock Foods Cycle Flavar Keeping...
  • Page 41 MICOM Function and Description of Circuit 2) LCD MODULE TYPE MODEL (GR-K20SVZ) (1) PCB Circuit Drawing Right Left Condensation-H Condensation-H Right Ripening-H Left Ripening-H R1-SENSOR (Left Sensor) R2-SENSOR Right Sensor Temperature Compensation1 Left Right Remarks Resistance Value warmer Remarks cooler...
  • Page 43 MICOM Function and Description of Circuit (2) DISPLAY PCB Assembly...
  • Page 44: Warnings For Disassembling Product

    Warnings For Disassembling Product Chapter 6 Warnings For Disassembling Product Chapter 6 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. •...
  • Page 45: Exploded View And Parts List

    Exploded View and Parts List Chapter 7 Exploded View and Parts List Chapter 7 1) Exploded View I GR-K16SLQ 220A 281H 200A 232A 223A 128E 231A 220B 222A 128D 223B 281D 210A 128D 281G 203A 221A 420B 128E 604A 281E 420B 203B 319C...
  • Page 46: Exploded View And Part List

    Exploded View and Parts List 249G 147C 249F 147A 249D 249B 248D 249C 248A 148B 148C 148A 250A 270A 251A 408A 407A 407B 102A...
  • Page 47 Exploded View and Parts List I GR-K18SLQ 220A 281H 200A 222A 128E 223A 221A 220A 128D 222A 223A 281D 210A 128D 281G 203A 221A 420B 128E 604A 281E 420B 319C 501A 618A 619A 420A 203A 329C 604A 502B 317A 327A 323B 411A 619B...
  • Page 48 Exploded View and Parts List 147C 249G 248D 249F 249D 147A 249B 249C 248A 250A 270A 251A 408A 407A 407B 102A...
  • Page 49 Exploded View and Parts List I GR-K20SVZ 220A 281H 200A 232A 223A 128E 231A 220B 222A 128D 223B 281D 210A 128D 281G 221A 203A 420B 128E 604A 281E 420B 203B 319C 619A 501A 618A 420A 604A 502B 317A 329C 327A...
  • Page 50 Exploded View and Parts List 249G 148B 148C 249F 148A 249D 249B 249C 248A 408A 407A 250A 407B 270A 102A...
  • Page 51 Exploded View and Parts List 2) Service Parts List GR-K16SLQ Part No. Location Description Quantity STARION REF' SET DCAX00459R 102A SUPPORTER ASSEMBLY LEG CBA200153A J215-00002A 128D BUSH,HINGE CBB200019B 4984JA2013B 128E BUSH,HINGE CBB200020B 4984JA2014B 148A BANK CBA100321A 5074JA1045A 148B COVER ASSY, BANK DCA100273A 3551JA1054A 148C...
  • Page 52 Exploded View and Parts List Part No. Location Description Quantity STARION 307A RE-COMPRESSOR,ASSY DCAX00103C 2521C-A5611 308A P.T.C DCAX00094C 6748C-0002C 309A CLCX00001S 6750C-0004S 310A COVER, PTC CBA200081B 3550JA2087B 310B JOINT PIPE ASSY CNB200027E 5201JA2041E 312A RUBBER,SEAT CKA300009A 5040JA3021A 314A STOPPER CAB400006A 4J03277A 315A COMP BASE ASSY...
  • Page 53 Exploded View and Parts List GR-K18SLQ Part No. Location Description Quantity STARION REF' SET DCAX00462X 102A SUPPORTER ASSEMBLY LEG CBA200153A J215-00002A 128D BUSH,HINGE CBB200019B 4984JA2013B 128E BUSH,HINGE CBB200020B 4984JA2014B 147A BANK CBA100323A 5074JA1044A 147C COVER ASSY, BANK DCA100275A 3551JA1053A 248D BANK ASSY DCA100274A 5075JA1025A...
  • Page 54 Exploded View and Parts List Part No. Location Description Quantity STARION 315C CGF400001A 4J04238A 315D BARRIER ASSY, BOTTOM DCA200091D 4791JA2003D 317A DRIER ASSY DCA200098D 5851JA2005D 319C BRACKET,MOTOR CBA100135A 4810JA1030A 323B WIRE COND' ASSY DCA100346A 5403JA1051A 327A RUBBER,MOTOR-N CKA300001B J756-00008B 329C FAN ASSY DCA100163A 5901JA1013A...
  • Page 55 Exploded View and Parts List GR-K20SVZ Part No. Location Description Quantity STARION REF' SET DCA000064P 102A SUPPORTER ASSEMBLY LEG CBA200153A J215-00002A 128D BUSH,HINGE CBB200019B 4984JA2013B 128E BUSH,HINGE CBB200020B 4984JA2014B 148A BANK,SIDE DISH CBA100450A 5074JA1058A 148B COVER ASSY BANK DCA100405A 3551JA1079A...
  • Page 56 Exploded View and Parts List Part No. Location Description Quantity STARION 312A RUBBER,SEAT CKA300009A 5040JA3021A 314A STOPPER CAB400006A 4J03277A 315A COMP BASE ASSY DCA000032A 3103JA0007A 315B ROLLER CBA300102A 3J02312A 315C CGF400001A 4J04238A 315D BARRIER ASSY, BOTTOM DCA200091A 4791JA2003A 317A DRIER ASSY DCA200098D 5851JA2005D 319C...
  • Page 57 Memo...
  • Page 58 P/No. : EBAX00030A Printed in Korea...

This manual is also suitable for:

Gr-k16slqGr-k18slq