LG LRSPC2051xx Service Manual

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CAUTION

PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK BEFORE CHECKING OR OPERATING THE REFRIGERATOR.

REFRIGERATOR

SERVICE MANUAL

MODEL: LRSPC2051AB / LRSPC2051BM

LRSPC2051ST

COLOR: ATLANTIC BLUE

BLACK MIRROR

STAINLESS STEEL

http://biz.lgservice.com

Ref. No. GR-L207NGUA GR-L207NSUA

WARNINGS AND PRECAUTIONS FOR SAFETY ................................................................................................................ 3

SPECIFICATIONS................................................................................................................................................................... 4

PARTS IDENTIFICATION..................................................................................................................................................... 12

HOW TO INSTALL THE REFRIGERATOR.......................................................................................................................... 18

HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR........................................................................................ 18

HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER......................................................... 20

MICOM FUNCTION .............................................................................................................................................................. 22

EXPLANATION FOR MICOM CIRCUIT............................................................................................................................... 30

EXPLANATION FOR PWB CIRCUIT ..................................................................................................................................30

COMPENSATION CIRCUIT FOR TOO WARM, TOO COLD AT FREEZER.......................................................................44

PWB PARTS DRAWING AND LIST ....................................................................................................................................47

PWB CIRCUIT DIAGRAM...................................................................................................................................................57

ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD........................................................... 61

WORKING PRINCIPLES.....................................................................................................................................................61

FUNCTION OF ICE MAKER...............................................................................................................................................62

ICEMAKER TROUBLESHOOTING.....................................................................................................................................65

ICEMAKER CIRCUIT PART................................................................................................................................................66

CIRCUIT................................................................................................................................................................................ 67

TROUBLE DIAGNOSIS........................................................................................................................................................ 69

TROUBLE SHOOTING ...................................................................................................................................................... 69

FAULTS .............................................................................................................................................................................. 79

COOLING CYCLE HEAVY REPAIR................................................................................................................................... 96

HOW TO DEAL WITH CLAIMS........................................................................................................................................ 103

HOW TO DISASSEMBLE AND ASSEMBLE..................................................................................................................... 108

DOOR............................................................................................................................................................................... 108

HANDLE........................................................................................................................................................................... 109

SHROUD, GRILLE FAN................................................................................................................................................... 109

ICEMAKER....................................................................................................................................................................... 109

DISPENSER..................................................................................................................................................................... 110

WATER TANK AND WATER LINE.................................................................................................................................... 112

HOME BAR....................................................................................................................................................................... 112

EXPLODED VIEW............................................................................................................................................................... 113

REPLACEMENT PARTS LIST........................................................................................................................................... 122

CONTENTS

- 2 -

Please observe the following safety precautions to use the refrigerator safely and correctly and to prevent accident or injury when servicing.

1. Be careful of an electric shock. Disconnect power cord from wall outlet and wait for more than three minutes before replacing PWB parts. Shut off the power whenever replacing and repairing electric components.

2. When connecting power cord, please wait for more than five minutes after power cord was disconnected from the wall outlet.

3. Please check if the power plug is pressed down by the refrigerator against the wall. If the power plug was damaged, it may cause fire or electric shock.

4. If the wall outlet is overloaded, it may cause fire. Please use a dedicated circuit for the refrigerator.

5. Please make sure the outlet is properly grounded, particularly in a wet or damp area.

6. Use standard electrical components.

7. Make sure the hooks are correctly engaged. Remove dust and foreign materials from the housing and connecting parts.

8. Do not fray, damage, machine, heavily bend, pull out, or twist the power cord.

9. Please check for evidence of moisture intrusion in the electrical components. Replace the parts or mask with insulation tape if moisture intrusion was confirmed.

10. Do not touch the icemaker with hands or tools to confirm the operation of geared motor.

11. Do not suggest that customers repair their refrigerator

themselves. This work requires special tools and knowledge. Non-professionals could cause fire, injury, or damage to the product.

12. Do not store flammable materials such as ether, benzene, alcohol, chemicals, gas, or medicine in the refrigerator.

13. Do not put anything on top of the refrigerator, especially samething containing water, like a vase.

14. Do not put glass bottles with full of water into the freezer. The contents will freeze and break the glass bottles.

15. When you scrap or discard the refrigerator, please remove the doors and dispose of it where children are not likely to play in or around it.

WARNINGS AND PRECAUTIONS FOR SAFETY

- 3 -

SPECIFICATIONS

- 4 -

ITEMS SPECIFICATIONS

DIMENSIONS 898(W)X847(D)X1756(H)mm

(35

/3X331/3X691/8 in.)

NET WEIGHT 151kg (332

/8 lbs.) COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) (6

/2 oz.) LUBRICATING OIL FREOL @15G (320 cc) DRIER 1Ø0.83

ITEMS SPECIFICATIONS

CAPILLARY TUBE MOLECULAR SIEVE XH-7 FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L - Cord

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater Home Bar Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

1. Ref No. : GR-P247

898 (351/3)

/8)

1756 (69

948 (373/8)

/8)

685 (27)

745 (29

796 (31

/3)

847 (33

1218.5 (48)

SPECIFICATIONS

- 5 -

ITEMS SPECIFICATIONS

DIMENSIONS 898(W)X762(D)X1756(H)mm

(35

/3X30X691/8 in.)

NET WEIGHT 146kg (321

/8 lbs.) COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) (6

/2 oz.) LUBRICATING OIL FREOL @15G (320 cc) DRIER 1Ø0.83

2. Ref No. : GR-P207

ITEMS SPECIFICATIONS

CAPILLARY TUBE MOLECULAR SIEVE XH-7 FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L - Cord

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater Home Bar Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

898 (351/3)

/8)

1756 (69

948 (37

/8)

660 (26)

711 (28)

600 (23

762 (30)

1133.5 (44

SPECIFICATIONS

- 6 -

ITEMS SPECIFICATIONS

DIMENSIONS 898(W)X847(D)X1756(H)mm

(35

/3X331/3X691/8 in.)

NET WEIGHT 145kg (319

/3 lbs.) COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) (6

/2 oz.)

LUBRICATING OIL FREOL @15G (320 cc)

ITEMS SPECIFICATIONS

DRIER 1Ø0.83 CAPILLARY TUBE MOLECULAR SIEVE XH-7 FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L-Cord

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

3. Ref No. : GR-L247

898 (351/3)

/8)

1756 (69

948 (37

/8)

/3)

685 (27)

745 (29

796 (31

847 (33

1218.5 (48)

SPECIFICATIONS

- 7 -

ITEMS SPECIFICATIONS

DIMENSIONS 898(W)X762(D)X1756(H)mm

(35

/3X30X691/8 in.)

NET WEIGHT 140kg (308

/3 lbs.) COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) (6

/2 oz.)

LUBRICATING OIL FREOL @15G (320 cc)

ITEMS SPECIFICATIONS

DRIER 1Ø0.83 CAPILLARY TUBE MOLECULAR SIEVE XH-7 FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L-Cord

ANTI SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

4. Ref No. : GR-L207

898 (351/3)

/8)

1756 (69

948 (37

/8)

660 (26)

711 (28)

600 (23

762 (30)

1133.5 (44

SPECIFICATIONS

- 8 -

ITEMS SPECIFICATIONS

DIMENSIONS 898(W)X847(D)X1756(H)mm

(35

/3X331/3X691/8 in.)

NET WEIGHT 142kg (313

/2 lbs.) COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) (6

/2 oz.)

LUBRICATING OIL FREOL @15G (320 cc)

ITEMS SPECIFICATIONS

DRIER 1Ø0.83 CAPILLARY TUBE MOLECULAR SIEVE XH-7 FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L - Cord ANTI SWEAT HEATER Home Bar Heater ANTI-FREEZING HEATER Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

1. Ref No. : GR-C247

898 (351/3)

/8)

1756 (69

948 (37

/8)

/3)

685 (27)

745 (29

796 (31

847 (33

1218.5 (48)

SPECIFICATIONS

- 9 -

ITEMS SPECIFICATIONS

DIMENSIONS 898(W)X762(D)X1756(H)mm

(35

/3X30X691/8 in.)

NET WEIGHT 137kg (302

/7 lbs.) COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) (6

/2 oz.)

LUBRICATING OIL FREOL @15G (320 cc)

2. Ref No. : GR-C207

ITEMS SPECIFICATIONS

DRIER 1Ø0.83 CAPILLARY TUBE MOLECULAR SIEVE XH-7 FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L - Cord ANTI SWEAT HEATER Home Bar Heater ANTI-FREEZING HEATER Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

898 (351/3)

/8)

1756 (69

948 (37

/8)

711 (28)

762 (30)

660 (26)

600 (23

1133.5 (44

SPECIFICATIONS

- 10 -

ITEMS SPECIFICATIONS

DIMENSIONS 898(W)X847(D)X1756(H)mm

(35

/3X331/3X691/8 in.)

NET WEIGHT 140kg (308

/3 lbs.) COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) (6

/2 oz.)

LUBRICATING OIL FREOL @15G (320 cc)

ITEMS SPECIFICATIONS

DRIER 1Ø0.83 CAPILLARY TUBE MOLECULAR SIEVE XH-7 FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L-Cord ANTI-FREEZING HEATER Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

3. Ref No. : GR-B247

898 (351/3)

/8)

1756 (69

948 (37

/8)

/3)

685 (27)

745 (29

796 (31

847 (33

1218.5 (48)

SPECIFICATIONS

- 11 -

ITEMS SPECIFICATIONS

DIMENSIONS 898(W)X762(D)X1756(H)mm

(35

/3X30X691/8 in.)

NET WEIGHT 135kg (297

/8 lbs.) COOLING SYSTEM Fan Cooling TEMPERATURE CONTROL Micom Control DEFROSTING SYSTEM Full Automatic

Heater Defrost INSULATION Cyclo-Pentane COMPRESSOR P.T.C. Starting Type EVAPORATOR Fin Tube Type CONDENSER Wire Condenser REFRIGERANT R134a (185g) (6

/2 oz.)

LUBRICATING OIL FREOL @15G (320 cc)

ITEMS SPECIFICATIONS

DRIER 1Ø0.83 CAPILLARY TUBE MOLECULAR SIEVE XH-7 FIRST DEFROST 4 - 5 Hours DEFROST CYCLE 13 - 15 Hours DEFROSTING DEVICE Heater, Sheath

Heater, L-Cord ANTI-FREEZING HEATER Damper Heater FREEZER LAMP 40W (1 EA) REFRIGERATOR LAMP 40W (1 EA) DISPENSER LAMP 15W (1 EA)

4. Ref No. : GR-B207

898 (351/3)

/8)

1756 (69

948 (37

/8)

711 (28)

762 (30)

660 (26)

600 (23

1133.5 (44

PARTS IDENTIFICATION

- 12 -

Conversion Switch

(Meats/Vegetables)

Humidity Switch

Lamp

Shelf

Egg Box Snack Drawer

Vegetable Drawer

Vegetable Drawer/Meat Drawer

Door Rack

Refreshment Center (optional)

Shelf

Door Rack Wine Holder (optional)

Lamp

Drawer

or Shelf

(optional)

Lower Cover

Door Rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Automatic

icemaker

Door Rack

Cover PWB

Cover Hinge

Home Bar

Dairy Product Corner

Shelf

(Steel/

Tempered

Glass)

1. Ref No. : GR-P247, GR-P207

2. Ref No. : GR-P247, GR-P207

PARTS IDENTIFICATION

- 13 -

Conversion Switch

(Meats/Vegetables)

Humidity Switch

Lamp

Shelf

Egg Box Snack Drawer

Vegetable Drawer

Vegetable Drawer/Meat Drawer

Door Rack

Refreshment Center (optional)

Shelf

Door Rack Wine Holder (optional)

Lamp

Drawer

or Shelf

(optional)

Lower Cover

Door Rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Automatic

icemaker

Door Rack

Cover PWB

Cover Hinge

Home Bar

Dairy Product Corner

Shelf

(Steel/

Tempered

Glass)

PARTS IDENTIFICATION

- 14 -

Humidity Switch

Lamp

Shelf

Egg Box Snack Drawer

Vegetable Drawer

Vegetable Drawer/Meat Drawer

Door Rack

Guide Bottle

Shelf

Door Rack Wine Holder (optional)

Lamp

Drawer

or Shelf

(optional)

Lower Cover

Door Rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Automatic

icemaker

Door Rack

Conversion Switch

(Meats/Vegetables)

Cover PWB

Cover Hinge

Dairy Product Corner

Shelf

(Steel/

Tempered

Glass)

3. Ref No. : GR-L247, GR-L207

4. Ref No. : GR-L247, GR-L207

PARTS IDENTIFICATION

- 15 -

Conversion Switch

(Meats/Vegetables)

Humidity Switch

Lamp

Shelf

Egg Box Snack Drawer

Vegetable Drawer

Vegetable Drawer/Meat Drawer

Door Rack

Guide Bottle

Shelf

Door Rack Wine Holder (optional)

Lamp

Drawer

or Shelf

(optional)

Lower Cover

Door Rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Automatic

icemaker

Door Rack

Cover PWB

Cover Hinge

Dairy Product Corner

Shelf

(Steel/

Tempered

Glass)

PARTS IDENTIFICATION

- 16 -

Conversion Switch

(Meats/Vegetables)

Humidity Switch

Lamp

Shelf

Egg Box Snack Drawer

Vegetable Drawer

Vegetable Drawer/Meat Drawer

Door Rack

Refreshment Center (optional)

Shelf

Door Rack Wine Holder (optional)

Lamp

Icemaker

Drawer

or Shelf

(optional)

Lower Cover

Door Rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Door Rack

Cover PWB

Cover Hinge

Home Bar

Dairy Product Corner

Shelf

(Steel/

Tempered

Glass)

1. Ref No. : GR-C247, GR-C207

PARTS IDENTIFICATION

- 17 -

Conversion Switch

(Meats/Vegetables)

Humidity Switch

Lamp

Shelf

Egg Box Snack Drawer

Vegetable Drawer

Vegetable Drawer/Meat Drawer

Door Rack

Shelf

Door Rack Wine Holder (optional)

Lamp

Drawer

or Shelf

(optional)

Lower Cover

Door Rack

Drawer

Freezer

Compartment

Refrigerator

Compartment

Door Rack

Icemaker

Cover PWB

Cover Hinge

Dairy Product Corner

Shelf

(Steel/

Tempered

Glass)

3. Ref No. : GR-B247, GR-B207

1. How to Adjust Door Height of Refrigerator

■ Make the refrigerator level first. (If the refrigerator is not installed on a flat floor, the height of freezer and refrigerator door may not be the same.)

1. If the freezer door is lower than the refrigerator door:

2. If the height of freezer door is higher than the refrigerator door:

Insert a driver  into the groove  of adjusting screw and rotate driver in arrow direction (clockwise) until the refrigerator becomes horizontal.

HOW TO INSTALL REFRIGERATOR

- 18 -

Adjusting Screw

Driver

Height

Difference

Height Difference

2. How to Install Water Pipe

■ Install Water Filter (Applicable to some models)

■ 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.

2. Remove the lamp cover by pressing the protrusion under the cover and pulling the cover to the front.

■ Installing water filter

1. Initial installation of water filter Remove the filter substitute cap by turning it counterclockwise () by 90 degrees and pulling it down.

Note : Keep it hardy to use it later when you do not use the

filter.

Remove the red cap from the filter and attach the sticker. Insert the upper part of the filter () after aligning with the guideline marked on the control box, and fasten it by turning it clockwise by 90 degrees.

Note : Check that the guideline and the fastening

indication line are aligned.

2. Replacement of water filter While holding the lower part of the filter, turn it counterclockwise () by 90 degrees and pull it down.

Note : Check that the guideline and the loosening

indication line are aligned.

■ After installing water filter

Reassemble the lamp cover and the top shelf of the refrigerator. To place the top shelf of the refrigerator, raise the front part of the shelf a bit so that the hook of the shelf is fit into the groove. In order to clean the water filter system, drain water for about 3 min.

Note : Then open the door of the refrigerator and check for

water drops on the shelf under the filter.

HOW TO INSTALL REFRIGERATOR

- 19 -

Control box

Aligning with the guide line and the fastening indication line

Control box

Aligning with the guide line and the loosening indication line

Removal of red cap

Sticker

Substitute cap

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 bin 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. it may damage refrigerator or injure hands.)

• Check the operation of motor by listening to its noise.

2. Apply electricity after connecting water pipe.

1) Press test switch under the icemaker for two seconds as shown below.

2) The bell rings(ding~dong), ice tray rotates, and water comes out from the icemaker water tube.

3) The water shall be supplied two or three times into the tray. The amount of water supplied for each time is small. Put a water container under the ice tray and press test switch.

4) When ice tray rotates, the water in it will spill. Collect the spilled water and throw it into the sink.

5) When ice tray has finished rotation, water comes out from the water tube. Confirm the amounts of water in the ice tray. (refer to Figure. The optimum amount of water is 110cc[6.7in

])

* It is acceptable if the adjusted level of water is a bit smaller than optimum level.

HOW TO INSTALL REFRIGERATOR

- 20 -

Test Switch

Confirm the amount

of water

Icemaker

Too much Too little

Optimum level

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 PWB cover as 310V is applied in the control panel.

1. Disconnect PWB cover from the upper part of the refrigerator.

2. Adjust the amount of water supplied by using the DIP switches.

■ Water Supplying Time Control Option

1) The water supplying time is set at five seconds when the refrigerator is delivered.

2) The amount of water supplied depends on the setting time and water pressure (city water pressure).

3) If the ice cubes are too small, increase the water supplying time. This happens when too little water is supplied to the tray.

4) If the ice cubes stick together, decrease the water supplying time. This happens when too much water is supplied into the ice tray.

Caution : When adjusting the amount of water supplied,

adjust step by step. Otherwise the water may spill over.

3. When adjustment of control switch for the amount of water supplied is complete, check the level of water in the ice tray.

HOW TO INSTALL REFRIGERATOR

- 21 -

SWITCH NO Water Supply

SWITCH1 SWITCH2 SWITCH3 Time

OFF OFF OFF 6.5 Sec.

ON OFF OFF 5.5 Sec.

OFF ON OFF 6 Sec.

ON ON OFF 7 Sec.

OFF OFF ON 7.5 Sec.

ON OFF ON 8 Sec.

OFF ON ON 9 Sec.

ON ON ON 10 Sec.

(+) Driver

Switch ON Switch OFF

Confirm the amount

of water

Optimum level

1. Monitor Panel

1-1. GR-P247, GR-P207, GR-L247, GR-L207 1-2. GR-C247, GR-C207, GR-B247, GR-B207

2. Description of Function

2-1-1. Funnction of Temperature Selection

* The temperature can vary ±3 °C depending on the load condition.

❉ Whenever pressing button, setting is repeated in the order of (Medium) ➝ (Medium Max) ➝ (Max) ➝ (Min) ➝

(Medium Min).

• The actual inner temperature varies depending on the food status, as the indicated setting temperature is a target temperature, not actual temperature within refrigerator.

• Refrigeration function is weak in the initial time. Please adjust temperature as above after using refrigerator for minimum 2~3 days.

MICOM FUNCTION

- 22 -

MAXMIN

LOCK

OFF

ROOM

TEMP

°F

TEMP

°F

FRZ TEMP FRZ TEMP

REF TEMP

DISPENSER

LOCK

SUPER FRZ

LOCK

SUPER FRZ

Dispenser selection button. Temperature adjustment button

for refrigerator compartment. Temperature adjustment button

for freezer compartment.

Super freezer.

Lock button.

Temperature adjustment button for refrigerator compartment.

Temperature adjustment button for freezer compartment.

Super freezer.

Lock button.

LOCK

OFF

MAXMIN

CRUSHED CUBED

WATER

TEMP

ROOM

TEMP

°F

Division Power Initially On 1st Press 2st Press 3th Press 4th Press

Setting temperature

Temperature Control

Medium Medium Max Max Min Medium Min

Freezer Control

-19 °C [-2°F] -22 °C [-7°F] -23 °C [-9°F] -15 °C [5°F] -17 °C [1°F]

Refrigeration

3 °C [37°F] 2 °C [35°F] 0°C [32°F] 6 °C [43°F] 4 °C [39°F]

Control

FRZ TEMP

°F °F °F °F °F

REF TEMP

MAXMIN

FRZ TEMP

REF TEMP

FRZ TEMP

MAXMIN

REF TEMP

MAXMIN

FRZ TEMP

MAXMIN

REF TEMP

MAXMIN

°F °F °F °F °F

MAXMIN

FRZ TEMP

MAXMIN

REF TEMP

MAXMIN

2-1-2. LCD Back Light Control

1. In order to easily view display status on the LCD, LCD Back Light is turned on for a minute in application of initial power, for a minute in button manipulation and for a minute after closing time from opening time of door.

2. If pressing any display button once with the backlight turned off, buzzer rings and button function is not performed but only backlight is turned on (If pressing the first button with the back light turned off, only back light ON function is performed).

3. If pressing the special freezing button and the freezing temperature adjustment button for more than a second, the back light is turned on and all the graphics of LCD are turned on. If releasing the button, the LCD graphic is displayed in the previous status and the back light is turned off (check LCD graphic and back light ON/OFF status).

2-1-3. Outside temperature display function

1. Outside temperature sensor at the left U of refrigerator senses ambient temperature and displays the outside temperature in the left side of Outside temperature text on the LCD of the display part.

2. Ambient temperature is displayed up to -9°C[16°F] ~ 49°C[120°F] and displayed as Lo for less than -10°C[14°F] and as HI for more than 50°C[122°F]. If the ambient temperature sensor fails, it is displayed as Er.

3. Since display temperature of outside temperature is temperature sensed by the ambient sensor in the hinge U of the freezing room, it may differ from the outside temperature display of other household electrical appliances.

2-1-4. Lock function (display button lock)

1. In power application of refrigerator, the only Release text is turned on at the right side of lock graphic of LCD with the lock release status.

2. If desiring to lock the display status and pressing the lock/release button once, Release text is turned off at the right side of lock graphic of LCD and Lock text is turned on with lock status.

3. The only buzzer sound rings and function is not performed even if pressing display button other than lock/release key in the lock status.

4. If desiring to release the lock status and pressing the lock/release button once, Lock text is turned off at the right side of lock graphic of LCD and Release text is turned on with lock release status.

2-2. Dispenser use selection

You can select water or ice. ❉ Please select water, slice ice and square ice by pressing

button as you desire.

❉ Please press the push button lightly by catching and pushing in cup.

• The border line is indicated for the selected function.

• Tak! sounds if 5 seconds pass after ice comes out.

It is sound that the outlet of ice is closed.

REFERENCE : Please wait for 2-3 seconds in order to take final ice

slices or drops of water when taking out cup from the pressing switches after taking ice or water.

2-3. Automatic icemaker

• The automatic icemaker can make 8 pieces of ice at a time, up to 10 times a day, for a total of 80 pieces per day. This

quantity may vary, affected by ice usage, ambient temperature, frequency of door opening, etc.

• Ice making stops when the ice storage bin is full.

• If you don’t want to use automatic icemaker, set the icemaker power switch OFF.

If you want to use automatic icemaker again, set the icemaker power switch ON.

NOTE : It is normal that a noise is produced when ice made is dropped into the ice storage bin.

MICOM FUNCTION

- 23 -

DISPENSER

CRUSHED CUBED

WATER

Pressing

Switch

DISPENSER

2-4. When icemaker does not operate smoothly

Ice is lumped together

• When ice is lumped together, take the lumps out of the ice storage bin, break them into small pieces, and then place them

into the ice storage bin again.

• When the icemaker produces too small or lumpy ice, the amount of water supplied to the icemaker needs to adjusted.

Contact the service center.

✻ If ice is not used frequently, it may lump together.

Power failure

• Ice may drop into the freezer compartment. Take the ice storage bin out and discard all the ice dry the bin and replace it.

After the machine is powered again, crushed ice will be automatically selected.

The unit is newly installed

• It takes about 12 hours for a newly installed refrigerator to begin making ice.

2-5. Super freezer

Please select this function for prompt freezer.

• On or Off is repeated whenever pressing button.

• The arrow mark graphic remains at the On status after flickering 4 times when

selecting Special Refrigeration On.

• Super freezer function automatically turns off if a fixed time passes.

2-6. Lock

This button stops operation of different button.

• Locking or Release is repeated whenever pressing the .

• Pressing the other button when selecting ‘LOCK’, the button does not operate.

2-7. Special freezing

1. Special freezing is function to improve cooling speed of the freezing room by consecutively operating compressors and freezing room fan. If pressing the special freezing button, Turn Off text of the LCD panel is turned off and Turn On is immediately turned on and Arrow ( ) graphic is turned on after flickering once.

2. Special freezing is cycled in order of Selection/ Release (Turn On / Turn Off) whenever pressing the selection button.

3. Special freezing is released if power failure occurs and then returns to the original status.

4. Temperature setting is not changed even if selecting the special freezing.

5. The change of temperature setting at the freezing room or the cold storage room is allowed with special freezing selected and processed.

6. The cold storage room operates the status currently set with special freezing selected and processed.

7. If selecting the special freezing, the special freezing function is released after continuously operating compressor and freezing room fan.

8. If frost removal starting time is arrived during special freezing, special freezing operation is done only for the remaining time after completion of frost removal when the special freezing operation time passes 90 minutes. If passing 90 minutes, special freezing operation is done only for 2 hours after completion of frost removal.

9. If pressing special freezing button during frost removal, the special freezing LCD is turned on but if pressing the special freezing, compressor operates after the remaining time has passed.

10. If selecting special freezing within 7 minutes (delay for 7 minutes of compressor) after the compressor stops,

compressor operates after the remaining time has passed.

11. The freezing room fan motor operates at the high speed of RPM during operation of special freezing.

MICOM FUNCTION

- 24 -

Ex) In selecting

Off

SUPER FRZ

OFF

Ex) In selecting

LOCK

Ex) In selecting

LOCK again

LOCK

SUPER FRZ

2-8. Control of variable type of freezer compartment fan

1. To increase cooling speed and load response speed, the 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.

3. If opening doors of freezing / cold storage room or home bar while fan motor in the freezing room operates, the freezing room fan motor normally operates (If being operated in the high speed of RPM, it converts operation to the standard RPM). However, if opening doors of freezing room or home bar, the freezing room fan motor stops.

4. As for monitoring of BLDC fan motor error in the freezing room, MICOM immediately stops the fan motor by determining that the BLDC fan motor is locked or poor if there would be position signal for more than 65 seconds at the BLDC motor. Then it displays failure (refer to failure diagnosis function table) at the display part of refrigerator, performs re-operation in the cycle of 30 minutes. If normal operation is performed, poor status is released and refrigerator returns to the initial status (reset).

2-9. Control of M/C room fan motor

1. The M/C room fan motor performs ON/OFF control by linking with the COMP.

2. It controls at the single RPM without varying RPM.

3. Failure sensing method is same as freezing fan motor (refer to failure diagnosis function table for failure display).

2-10. Door opening alarm

1. Buzzer generates alarm sound if doors are not closed even when more than a minute consecutively has passed with doors of freezing / cold storage room or home bar opened.

2. Buzzer rings three times in the interval of half second after the first one-minute has passed after doors are opened and then repeats three times of On/Off alarm in the cycle of every 30 seconds.

3. If the doors of the freezer or home bar are closed during door open alarm, alarm is immediately released.

2-11. Ringing of button selection buzzer

1. If you press the front display button, the Ding sound.

2-12. Ringing of compulsory operation, compulsory frost removal buzzer

1. If you press the test button on the Main PCB, the Phi sounds.

2. In selecting compulsory operation, alarm sound is repeated and completed in the cycle of On for 0.2 second and Off for

1.8 second three times.

3. In selecting compulsory frost removal, alarm sound is repeated and completed in the cycle of On for 0.2 second , Off for

0.2 second, On for 0.2 second and Off for 1.4 second three times.

MICOM FUNCTION

- 25 -

Any Door

BUZZER

Closing

Opening

Within

a minute

A minute

seconds30seconds30seconds

Opening

Closing Closing

3 Times 3 Times 3 Times 3 T imes

2-13. Frost removal function

1. Frost removal is performed whenever total operation time of compressor becomes 7 ~ 71/2 hour.

2. In providing initial power (or returning power failure), frost removal starts whenever total operation time of compressor becomes 4 ~ 4

/2 hour.

3. Frost removal is completed if temperature of a frost removal sensor becomes more than 5°C[41°F] after starting frost removal. Poor frost removal is not displaced if it does not arrive at 5°C[41°F] even if two hours have passed after starting frost removal.

4. No removal is done if frost removal sensor becomes poor (snapping or short-circuit).

2-14. Sequential operation of built-in product

Built-in products such as compressor, frost removal heater, freezer fan, cooling fan and step motor damper are operated sequentially as shown below to prevent noise and damage from power surges that occur when all parts are powered up at once.

MICOM FUNCTION

- 26 -

Function Load Operation Sequence Remark

In applying Initial power TEST MODE

When temperature of a frost removal sensor becomes more than 45°C [77°F]

If error occurs during operation, initial operation is not done.

If pressing switch once more in the test mode 2 or temperature of a frost removal sensor is more than 5°C[41°F], it immediately returns to the test mode for initial operation (Compressor operates after 7 minutes).

When temperature of a frost removal sensor becomes less than 45°C [77°F]

Test mode 1 (Compulsory function)

Test mode 2 (Compulsory frost removal)

POWER

COMP

STEP

MOTOR

DAMPER

STEP

MOTOR

DAMPER

OPEN

STEP

MOTOR

DAMPER

HOME

BAR

HEATER

POWER

FROST

REMOVAL

HEATER

HOME

BAR

HEATER

OFF

HOME

BAR

HEATER

TEST

S/W

(Press

Once)

COMP

TEST

S/W

(Press

2 times)

COMP

OFF

1/2

sec.

1/4

sec.

1/4

sec.

1/4

sec.

1/2

sec.

1/4

sec.

FROST

REMOVAL

HEATER

OFF

WATER

SUPPLY

DISPENSE

HEATER

sec.

1/4

sec.

1/4

sec.

1/4

sec.

1/4

sec.

1/4

sec.

1/4

sec.

1/4

sec.

5.6

sec.

OTHER

LOAD

OFF

F-FAN

C-FAN

F-FAN

C-FAN

F-FAN

C-FAN

F-FAN

C-FAN

OFF

FROST

REMOVAL

HEATER

2-15. Failure Diagnosis Function

1. Failure diagnosis function is to facilitate service when a failure occurs 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. If nonconforming matters occurred are released during display of failure code, MICOM returns to the original state (Reset).

4. Failure code is displayed on the display part of setting temperature for the freezing room and the display part of setting temperature for the cold storage room of LCD, which are placed at the display part of a refrigerator. All the LCD graphics other than a failure code are turned off.

✽ In display of the failure mode, all LCDs of setting temperature for freezing/ setting temperature for cold storage are turned

off (excluding Note1 and Note2).

MICOM FUNCTION

- 27 -

OFF

MAXMIN

CRUSHED CUBED

WATER

OFF

MAXMIN

Failure Code display Part

High quality type (GR-P207, L207, P247, L247)

Failure Code display Part

Basic type GR-C247, B247, C207, B207)

A B

ROOM

TEMP

ROOM

TEMP

°F

TEMP

°F

●● : Normal Operation

Er FS

Er RS

Setting temperature

display (Note 2)

Er DS

Er dH

Er FF

Er CF

Er CO

Setting temperature

display (Note 1)

Setting temperature

display (Note 2)

Setting temperature

display (Note 2)

Failure code display part

Setting

temperature

for freezing

Setting

temperature for

cold storage

No. Item

Contents of failure

Freezer

Fan

Compressor

Stepping

motor damper

Defrost

Heater

M/C room

Fan

Product operation status in failure

Failure of freezer sensor

Failure of refrigerator sensor 1

Failure of refrigerator sensor 2

Failure of frost removal sensor

Poor of frost removal

Failure of BLDC FAN at freezing room

Failure of BLDC FAN at machine room

Failure of Communication

Failure of Outside Sensor

Failure of ice removal sensor

Failure of icemaker unit

Snapping or short-circuit of freezer sensor

Snapping or short-circuit of refrigerator sensor 1

Snapping or short-circuit of refrigerator sensor 2

Snapping or short-circuit of frost removal sensor

Snapping of frost removal heater or temperature fuse, pull-out of connector (indicated minimum 4 hours after failure occurs)

Poor motor, hooking of wires to fan. Contact of structures to Fan. Snapping or short-circuit of L/wire (if there is no fan motor signal for more than 60 seconds in operation of fan motor

Connection between main PCB and display PCB. Snapping or short-circuit of L/wire. Transmission between main PCB and display PCB. Poor TR and receiving part.

Snapping or short-circuit of outside temperature perceiving sensor

Snapping or short-circuit of icemaking sensor

Poor motor or Hall IC within ice-maker unit. Snapping or short-circuit of L/Wire. Poor main PCB drive circuit.

Standard

RPM

Standard

RPM

Standard

RPM

Standard

RPM

Standard

RPM

OFF (check every

30 minutes)

Standard

RPM

Standard

RPM

●●

OFF (check

every 30 minutes)

●●

ON for 15minutes OFF for 15minutes

●●

No frost removal

●●

Open for 10munutes, closing for 15 minutes

●●

Note1) In error of outside sensor, setting temperature for freezing/ cold storage is normally displayed and indicated Er on

the outside temperature display part (normally displayed except for the outside temperature display part).

Note2) Nonconforming contents of poor R2 sensor, Icemaker-sensor and icemaker kit are displayed in LCD check, not

indicated on the failure display part (when pressing freezing temperature adjustment button and special freezing button for a second or more).

Cold storage sensor 2 Normal : (C) Part LCD graphic- ON (middle partition) Abnormal: Only (C) Part LCD graphic-OFF

Icemaker sensor

Normal: (D) Part LCD graphic-ON Abnormal: Only (D) Part LCD graphic-ON

Icemaker Unit

Normal: (E) Part LCD graphic-ON Abnormal : Only (E) Part LCD graphic-ON

2-16. 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 regardless of test mode and then is reset to the normal status.

3. Function adjustment button is not perceived during performance of test mode but only warning sounds ring.

4. In finishing test mode, always pull the power cord out and then plug-in it again for the normal state.

5. If nonconforming contents such as sensor failure are found during performance of test mode, release the test mode and display the failure code.

6. If you press the test button during a failure code display, test mode will not be activated.

MICOM FUNCTION

- 28 -

Other LCD graphics - ON

Test 1

Test 2

Normal

Conditions

Mode Manipulation Content Remarks

Press TEST switch once

Press TEST switch once at TEST1 condition.

Press TEST switch once at TEST2 condition.

1. Continuous operation of compressor

2. Continuous operation of freezing room fan (high speed RPM) and M/C room fan

3. Frost removal heater OFF

4. Full opening status (baffle opened) status of electronic step motor damper

5. All display LCD graphics - ON.

1. Compressor OFF

2. Freezing room fan and M/C room fan is turned off.

3. Frost removal heater ON

4. Full closing status (baffle closed) status of electronic step motor damper

5. All display LCD graphics - OFF ( (A) Medium status. (B) Medium status. Only LCD is turned on)

Return to the initial status.

Freezing room fan is turned off in door open.

Compressor is operated after 7 minutes.

✻ LCD check function: If simultaneously pressing special freezing button and cold temperature adjustment button for a

second, a back light is turned on and all display LCD graphics on. If releasing the button, the LCD graphic displays the previous status, the back light is turned off (LCD graphic and back light ON/OFF check).

2-17. Function of dispenser and water dispenser built-in

1. This is function allowing ice and water to come outside without opening door.

2. If pressing the dispenser switch (bushing button) after selecting ice (cube ice, crushed ice) or water, ice and water equivalent to each come out. However, the duct doors are opened by electrical solenoid valve (Duct Door Solenoid) if pressing the press switch in case of selecting ICE. If pressing the dispenser press switch and then detaching the hands, the duct door is closed after it is opened for 5 seconds.

3. Function allowing ice and water to come stops if freezing room doors are opened.

4. If there is no Off signal even when 3 minutes have passed while pressing the dispenser press switch after selecting ice (cube ice, crushed ice) or water, geared motor and solenoid (Cube, Water) is automatically turned off. However, the solenoid (duct door) is stop 5 seconds after Off (to prevent short-circuit of a coil due to overheat of solenoid).

5. Dispenser Lamp On/Off function Lamp on the dispenser part is turned on if pressing the dispenser press switch after selecting ice (cube ice, crushed ice) or water. If detaching the hands, it is turned off.

6. Selection function of water/crushed/ cube ice

1) This is function to allow selection of water/crushed/ cube ice function depending on user’s selection. Display and

selection is done if pressing the dispenser selection button.

2) In the initial Power On, cube ice is automatically selected.

3) In selecting cube ice, geared motor is operated so that crushed ice can be supplied outside if pressing the press switch

when ice is formed in the ice storage container (Ice Bin).

4) In selecting cube ice, geared motor is operated so that cube ice can be supplied outside if pressing the press switch

when ice is formed in the ice storage container (Ice Bin).

7. Water dispenser function

1) LCD is displayed for selection if user selects water at the function adjustment part.

2) Water dispenser function is a type directly connected to a water pipe. The water solenoid valve built-in at the right side

of the M/C room is opened so that water can be supplied if selecting Water from the function adjustment part and then pressing the press switch.

MICOM FUNCTION

- 29 -

LOCKFRZ TEMP

REF TEMP

SUPER FRZ

MAXMIN

LOCK

OFF

LOCK

FRZ TEMP

REF TEMP

DISPENSER

LOCK

SUPER FRZ

MAXMIN

FRZ TEMP

REF TEMP

DISPENSER

LOCK

SUPER FRZ

LOCK

OFF

MAXMIN

CRUSHED CUBED

WATER

TEMP

°C

TEMP

ROOM

TEMP

ROOM TEMP

°C

°F

°C

°F

°C °F

1. Explanation for PWB circuit

1-1. Power circuit

1. GR-P247, L247, C247, B247 / P207, L207, C207, B207

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.

Caution : Since high voltage (DC310V) is maintained at the power terminal, please take a measure after more than 3

minutes have passed after removing power cords in the abnormal operation of a circuit.

Voltage of every part is as follows:

EXPLANATION FOR MICOM CIRCUIT

- 30 -

Part VA1 CE1 CE2 CE3 CE4 CE5

Voltage 230 Vac 310 Vdc 16 Vdc 12 Vdc 15.5 Vdc 5 Vdc

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.

1-3. Reset circuit

The reset circuit is circuit allowing various parts such as RAM inside of MICOM (IC1) to initialize and the whole of function to start from the initial status, when initial power is input or when power is applied again to MICOM by a spontaneous power failure. ‘LOW’ voltage is applied to the reset terminal of MICOM in the beginning of power supply for a constant time (10ms). Reset terminal during general operation is 5V (No MICOM operates in failure of RESET IC).

EXPLANATION FOR MICOM CIRCUIT

- 31 -

<GR-P247, L247, P207, L207> <GR-C247, B247, C207, B207>

1-4. Load/dispenser operation, door opening circuit

1. LOAD DRIVING CIRCUIT

✽ In even 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.

✽ (A), (B), (C) and (D) of door switch for the freezing room or freezer are connected to the door open sensing circuit in

parallel toward both ends of switch to determine door open at MICOM.

✽ Since a door switch of the home bar is connected to door switch (C), (D) of the cold storage room, It senses when any

door is opened.

✽ The fan motor is immediately stop if opening doors of the freezer or refrigerator at the TEST mode and it operates

immediately upon their closure.

1) GR-P247, L247, P207, L207

EXPLANATION FOR MICOM CIRCUIT

- 32 -

Measuring part (IC6) IC6-16 IC6-15 IC6-14 IC7-13 IC7-15

Status

ON Within 1 V

OFF 12 V

Type of Load Compressor

Frost Removal

Heater

AC Converting

Relay

Refrigerator

LAMP

Water Tank

Heater

2) GR-C247, B247, C207, B207

✽ The fan motor at the freezer does not stop but operates if opening doors of the freezer or refrigerator or the home bar

during operation of the fan motor at the freezer.

✽ (A), (B), (C) and (D) of door switch for the freezer or refrigerator are connected to the door open sensing circuit toward

both ends of switch to determine door open at MICOM.

✽ Since the door switches of the home bar and refrigerator are interconnected, the MICOM can tell when either door is

opened.

EXPLANATION FOR MICOM CIRCUIT

- 33 -

Measuring part (IC7) No.10 No.11 No.12 No.14 No.16

Status

ON Within 1 V

OFF 12 V

Type of Load COMP

Frost Removal

Heater

AC Converting

Relay

R-room LAMP

Home Bar

Heater

2. Dispenser operation circuit

1) Check load driving status

2) Lever S/W sensing circuit

EXPLANATION FOR MICOM CIRCUIT

- 34 -

Measuring part

Lever S/W

IC1(Micom) (No. 16)

On(Press)

OFF 5V

Measuring part IC6-13 IC6-12 IC6-11 IC6-10 IC7-12 IC7-10 IC7-16

Status

ON Within 1 V

OFF 12 V

Type of Load

GEARED

MOTOR

SOLENOID

CUBE

WATER VALVE

ICE WATER

SOLENOID

DISPENSER

HOME BAR

HEATER

SOLENOID

PILOT

5 V 0 V

(60 Hz)

3. Door opening sensing circuit

1) GR-P247, L247, P207, L207

2) GR-C247, B247, C207, B207, 197

✽ Since door switches (A) and (B) are interconnected, if either fails, the other will not respond properly. ✽ If either switch fails, the light will not come on.

EXPLANATION FOR MICOM CIRCUIT

- 35 -

(Freezing room)

(Cold storage room)

(Freezing room)

(Cold storage room)

Closing 5 V ( A - B , C - D . S/W at both ends are at Off status)

Opening 5 V ( A - B , C - D . S/W at both ends are at On status)

Measuring part

IC1 (MICOM) No. 47, 46 Pin

Door of Freezing/Cold Storage Room

1-5. Temperature sensing circuit

1) GR-P247, L247, P207, L207

The above circuits are circuits attached to freezer sensor or refrigerator sensor for adjusting setting temperature at the freezer and refrigerator, icemaking sensor for sensing water temperature in icemaking, or an evaporator for sensing temperature of a frost removal sensor necessary for frost removal. Short or open status of every temperature sensor is as follows:

EXPLANATION FOR MICOM CIRCUIT

- 36 -

SENSOR CHECK POINT

NORMAL(-30 °C ~ 50 °C) IN

SHORT IN OPEN

Freezing sensor POINT A Voltage

Frost removal sensor POINT B Voltage

Cold storage sensor 1 POINT C Voltage

0.5 V~4.5 V 0 V 5 V

Cold storage sensor 2 POINT D Voltage

Icemaking sensor POINT E Voltage

Room temperature sensor POINT F Voltage

(Sensor for freezing room)

(Sensor for frost removal)

(Sensor for cold storage room)

2) GR-C247, B247, C207, B207

EXPLANATION FOR MICOM CIRCUIT

- 37 -

(Sensor for freezing room)

(Sensor for frost removal)

(Sensor for cold storage room)

SENSOR CHECK POINT

NORMAL(-30 °C ~ 50 °C) IN

SHORT IN OPEN

Freezing sensor POINT A Voltage

Frost removal sensor POINT B Voltage Cold storage sensor 1 POINT C Voltage 0.5 V~4.5 V 0 V 5 V Cold storage sensor 2 POINT D Voltage

Room temperature sensor POINT E Voltage

1-6. Switch entry circuit

The following circuits are entry circuits for sensing signal form test switch, electronic single motor damper reed switch for examining refrigerator.

1) GR-P247, L247, P207, L207 2) GR-C247, B247, C207, B207

1-7. Option designation circuit (model separation function)

1) GR-P247, L247, P207, L207

2) GR-C247, B247, C207, B207

The above circuits are used for designating separation by model as option and notifying MICOM. Designation of option by model and the application standards are as follows:

u These circuits are accurately pre-adjusted in shipment from factory and so you must not additionally add or remove

option.

EXPLANATION FOR MICOM CIRCUIT

- 38 -

R21

4.7K

Separation Connection Status Application Standard

Connection Export model

OP1

OUT Domestic model

1-8. Stepping motor operation 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,.

Explanation) For driving method of the stepping motor, send signals in the cycle of 3.33 mSEC using terminal of MICOM

PIN 33, 34 and 35 as shown in wave form of the following part. These signals are output to the output terminal (No.10, 11, 14, 15) via the input terminal (No. 3, 6, 8) of the IC10 (TA7774F) as IC for motor driving. Output signals allow motor coils wound on each phase of stator to form rotation magnetic field and the motor to rotate. Inputting as below figure to the input terminal (INA, INB) as IC (TA7774AF) for motor driving allows motor coils wound on each phase of stator to form rotation magnetic field and the stepping motor damper to rotate

EXPLANATION FOR MICOM CIRCUIT

- 39 -

TA7774F

INA

INB

CCW (Reverse rotation) (Positive rotation) CW

1-9. Fan motor driving circuit (freezer, mechanical area)

1. The circuit cuts all power to the fan drive IC, resulting in a standby mode.

2. This is a circuit to perform a temporary change of speed for the fan motor and applies DC voltage up to 7.5V ~ 16V to motor.

3. This circuit performs function not to drive the fan motor further by cutting off power applied to the fan motor in the lock of fan motor by sensing the operation RPM of the fan motor.

1) GR-P247, L247, P207, L207

EXPLANATION FOR MICOM CIRCUIT

- 40 -

a , d part b part e part c , f part

Motor OFF 5V 2V or less 2V or less 0 V

Motor ON 2 ~ 3V 12 ~ 14V 8 ~ 16V 0 V

2) GR-C247, B247, C207, B207

EXPLANATION FOR MICOM CIRCUIT

- 41 -

Speed

1-10. Temperature compensation and temperature compensation circuit

1. Temperature compensation in freezer and refrigerator

1) GR-P247, L247, P207, L207

2) GR-C247, B247, C207, B207

u Temperature compensation table by adjustment value (difference value against current temperature)

Ex) If changing compensation resistance at a cold storage room (RCR1) from 10 kΩ (current resistance) to 18 kΩ

(modified resistance), temperature at the cold storage will increase by +1°C[+1.8°F].

EXPLANATION FOR MICOM CIRCUIT

- 42 -

Temperature compensation at refrigerator

Temperature compensation at freezer

Temperature compensation at refrigerator

Temperature compensation at freezer

Freezer Refrigerator

Resistance value Temperature Resistance value Temperature Remarks

(RCF1) compensation (RCR1) compensation 180 kΩ +5 °C [+9°F] 180 kΩ +2.5 °C [+4.5°F] Warmer

56 kΩ +4 °C [+7.2°F] 56 kΩ +2.0 °C [+3.6°F] 33 kΩ +3 °C [+5.4°F] 33 kΩ +1.5 °C [+2.7°F] 18 kΩ +2 °C [+3.6°F] 18 kΩ +1.0 °C [+1.8°F] 12 kΩ +1 °C [+1.8°F] 12 kΩ +0.5 °C [+0.9°F] 10 kΩ 0 °C [0°F] 10 kΩ 0 °C [0°F]

Reference temperature

8.2 kΩ -1 °C [-1.8°F] 8.2 kΩ -0.5 °C [-0.9°F]

5.6 kΩ -2 °C [-3.6°F] 5.6 kΩ -1.0 °C [-1.8°F]

3.3 kΩ -3 °C [-5.4°F] 3.3 kΩ -1.5 °C [-2.7°F] 2 kΩ -4 °C [-7.2°F] 2 kΩ -2.0 °C [-3.6°F]

470 Ω -5 °C [-9°F] 470 Ω -2.5 °C [-4.5°F] Cooler

u Temperature compensation table at the refrigerator is as follows:

u Temperature compensation at the freezer is also performed in the same manner as refrigerator. Temperature

compensation value is equivalent to two times the refrigerator.

u This circuit is a circuit to enter the necessary level of temperature compensation for adjusting different temperature every

model at the refrigerator into MICOM.

EXPLANATION FOR MICOM CIRCUIT

- 43 -

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

No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C 3.5 °C4 °C 4.5 °C5 °C

470Ω [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F] [6.3 °F] [7.2 °F] [8.1 °F] [9 °F]

change

Up Up Up Up Up Up Up Up Up Up

0.5 °C No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C 3.5 °C4 °C 4.5 °C

2 kΩ [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F] [6.3 °F] [7.2 °F] [8.1 °F]

Down change

Up Up Up Up Up Up Up Up Up

1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C 3.5 °C4 °C

3.3 kΩ [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F] [6.3 °F] [7.2 °F] Down

Down

change

Up Up Up Up Up Up Up Up

1.5 °C1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C 3.5 °C

5.6 kΩ [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F] [6.3 °F]

Down Down Down

change

Up Up Up Up Up Up Up

2 °C 1.5 °C1 °C 0.5 ° No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C

8.2 kΩ [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F]

Refrigerator

Down Down

Drop

Down

change

Up Up Up Up Up Up

(RCR1) 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C

10 kΩ [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F]

Down Down Down Down Down

change

Up Up Up Up Up

3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C2 °C

12 kΩ [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F]

Down Down Down Down Down Down

change

Up Up Up Up

3.5 °C3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C

18 kΩ [6.3 °F] [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F]

Down Down Down Down Down Down Down

change

Up Up Up

4 °C 3.5 °C3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C1 °C

33 kΩ [7.2 °F] [6.3 °F] [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F]

Down Down Down Down Down Down Down Down

change

Up Up

4.5 °C4 °C 3.5 °C3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C

56 kΩ [8.1 °F] [7.2 °F] [6.3 °F] [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F]

Down Down Down Down Down Down Down Down Down

change

5 °C 4.5 °C4 °C 3.5 °C3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °CNo

180 kΩ [9 °F] [8.1 °F] [7.2 °F] [6.3 °F] [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F]

Down Down Down Down Down Down Down Down Down Down

change

Modification

resistance

Current resistance

2. Compensation circuit for too warm, too cold at freezer.

1) GR-P247, L247, P207, L207 2) GR-C247, B247, C207, B207

u The above option circuit is a circuit to compensate for temperature at the refrigerator by simply cutting in service.

EXPLANATION FOR MICOM CIRCUIT

- 44 -

Compensation Compensation

for weak-cold for over-cold

Temperature compensation value

Remarks

JCR3 JCR4 JCR1 JCR2

at cold storage room

0 °C (In shipment from factory)

CUT -1 °C [-1.8 °F]

CUT +1 °C [+1.8 °F]

CUT CUT -2 °C [-3.6 °F]

CUT CUT +2 °C [+3.6 °F] CUT CUT 0 °C [0 °F] CUT CUT 0 °C [0 °F]

CUT CUT 0 °C [0 °F] CUT CUT 0 °C [0 °F]

CUT CUT CUT -1 °C [-1.8 °F]

CUT CUT CUT +1 °C [+1.8 °F]

CUT CUT CUT CUT 0 °C [0 °F]

Temperature compensation in CUT

JCR1 +1 °C [+1.8 °F]

+2 °C [+3.6 °F]

JCR2 +1 °C [+1.8 °F] JCR3 -1 °C [-1.8 °F]

-2 °C [-3.6 °F]

JCR4 -1 °C [-1.8 °F]

1-11. Communication circuit and connection L/Wire between main PCB and display PCB

The following circuit is a communication circuit used for exchanging the necessary information between main MICOM of main PCB and LCD dedicated MICOM for LCD control of display PCB.

Transmission/receipt L/Wire together with the necessary display PCB for driving the display PCB is required.

Poor communication occurs if a continuous information exchange fail to continue for more than 2 minutes between main MICOM of main PCB and LCD dedicated MICOM for LCD control of display PCB.

1) GR-P247, L247, P207, L207

EXPLANATION FOR MICOM CIRCUIT

- 45 -

GND

12Vdc

Transmission

Reception

CRUSHED CUBED

WATER

FRZ TEMP

REF TEMP

DISPENSER

LOCK

SUPER FRZ

OFF

MAXMIN

TEMP

ROOM

TEMP

°F

PCB ASSEMBL Y DISPLA Y

Main MICOM LCD dedicated MICOM

DC 12V

GND

Transmission (error status)

Reception (notch status)

Main PCB L/Wire FD/H(4-wires) Display PCB

2) GR-C247, B247, C207, B207

2. Sensor resistance characteristics table

u Resistance value allowance of sensor is ±5%. u In measuring resistance value allowance of sensor, perform measuring after leaving the sensor for more than 3 minutes

at the measuring temperature (delay is required due to sense speed relation relationship).

u Since an analog tester has a large measuring temperature, measuring with a digital tester is required as possible as. u Resistance of the cold storage sensor 1 and 2 shall be measured with a digital tester after separating CON8 of the PWB

ASSEMBLY and the MAIN part.

u Resistance of the freezing sensor shall be measured with a digital tester after separating CON7 of the PWB ASSEMBLY

and the MAIN part.

EXPLANATION FOR MICOM CIRCUIT

- 46 -

Measuring T emperature (°C) Freezing Sensor

Cold storage sensor 1, 2.

Frost removal sensor, Outside sensor

-20 °C 22.3 kΩ 77 kΩ

-15 °C 16.9 kΩ 60 kΩ

-15 °C 13.0 kΩ 47.3 kΩ

-5 °C 10.1 kΩ 38.4 kΩ 0 °C 7.8 kΩ 30 kΩ

+5 °C 6.2 kΩ 24.1 kΩ +10 °C 4.9 kΩ 19.5 kΩ +15 °C 3.9 kΩ 15.9 kΩ +20 °C 3.1 kΩ 13 kΩ +25 °C 2.5 kΩ 11 kΩ +30 °C 2.0 kΩ 8.9 kΩ +40 °C 1.4 kΩ 6.2 kΩ +50 °C 0.8 kΩ 4.3 kΩ

12Vdc

Reception

Transmission

FRZ TEMP

REF TEMP

TEMP

Transmission

GND

Reception

PCB ASSEMBL Y DISPLA Y

°F

MAXMIN

ROOM

°F

TEMP

MAXMIN

OFF

LOCK

SUPER FRZ

3. PWB parts diagram and list

3-1. PWB Assembly, main part diagram

1. GR-P247, L247, P207, L207

EXPLANATION FOR MICOM CIRCUIT

- 47 -

2. GR-C247, B247, C207, B207

EXPLANATION FOR MICOM CIRCUIT

- 48 -

3-2. Parts list

1. GR-P247, L247, P207, L207

EXPLANATION FOR MICOM CIRCUIT

- 49 -

EXPLANATION FOR MICOM CIRCUIT

- 50 -

WATER

SUPPLY

S/W

2. GR-C247, B247, C207, B207

EXPLANATION FOR MICOM CIRCUIT

- 51 -

EXPLANATION FOR MICOM CIRCUIT

- 52 -

WATER

SUPPLY

S/W

3-3. DISPLAY ASSEMBLY part diagram

1. GR-P247, L247, P207, L207

EXPLANATION FOR MICOM CIRCUIT

- 53 -

2. GR-C247, B247, C207, B207

EXPLANATION FOR MICOM CIRCUIT

- 54 -

DOUBLE SIDE TAPE SPREAD SHEET

3-4. DISPLAY circuit diagram

1. GR-P247, L247, P207, L207

EXPLANATION FOR MICOM CIRCUIT

- 55 -

Parts without ( ) mark means SMD parts.

2. GR-C247, B247, C207, B207

EXPLANATION FOR MICOM CIRCUIT

- 56 -

Reception

Transmission

Parts without ( ) mark means SMD parts.

4. PWB circuit diagram - PWB circuit diagram may vary a little bit depending on actual condition.

1. GR-P247, L247, P207, L207

EXPLANATION FOR MICOM CIRCUIT

- 57 -

PWB ASSEMBL Y , MAIN

EXPLANATION FOR MICOM CIRCUIT

- 58 -

PCB ASSEMBLY , DISPLA Y

2. GR-C247, B247, C207, B207

EXPLANATION FOR MICOM CIRCUIT

- 59 -

PWB ASSEMBL Y , MAIN

EXPLANATION FOR MICOM CIRCUIT

- 60 -

PCB ASSEMBLY, DISPLAY

1. Working Principles

1-1. Icemaker Working Principles

1-2. Dispenser Working Principles

1. This function is available in Model GR-P247, GR-P207 and GR-L247, GR-L207 where water and ice are available without opening freezer compartment door.

2. Crushed Ice is automatically selected when power is initially applied or reapplied after power cut.

3. When dispenser selection switch is continuously pressed, light is on in the following sequence: Water → Cube Ice → Crushed Ice.

4. Lamp is on when dispenser bushing button is pressed and vice versa.

5. When dispenser crushed ice bushing button is pressed, dispenser solenoid and geared motor work so that crushed ice can be dispensed if there is ice in the ice bin.

6. When dispenser cube ice bushing button is pressed, dispenser solenoid, cube ice solenoid and geared motor work so that cube ice can be dispensed if there is ice in the ice bin.

7. When dispenser water bushing button is pressed, water valve opens and water is supplied if water valve is normally installed on the right side of the compressor area.

8. Ice and water are not available when freezer door is open.

ICEMAKER AND DISPENSER OPERA TION PRINCIPLE AND REPAIR METHOD

- 61 -

• Level Icemaker Cube Mould for Initial Control after power is input.

Power Input

Initial Control

Ice Making Control

Ice Ejection Control

Water Supply Control

Test Control

• Wait until the water in the cube mould is frozen after icemaker starts operation.

• Check ice bin is full of ice by rotating ice ejection motor in normal and reverse direction and eject ice into the ice bin if ice bin is not full.

•

This is for refrigerator assembly line and service. When icemaking test switch is pressed,

it operates in the following steps: initial ice ejection water supply control steps.

• Conduct Icemaking Control after supplying water into the Icemaker cube mould by operating water valve.

2. Function of Icemaker

2-1. Initial Control Function

1. When power is initially applied or reapplied after power cut, it detects level of icemaker cube mould after completion of MICOM initialization. The detecting lever moves up and down.

2. The level of icemaker cube mould is judged by output signal, high and low signal, of Hall IC. Make the cube mould to be horizontal by rotating ice ejection motor in normal or reverse direction so that High/Low signal can be applied to MICOM Pin No. 42.

3. If there is no change in signals one minute after the geared motor starts to operate, it stops icemaker operation and check the signal every hour. It resets initialization of icemaker when it becomes normal.

4. It judges that the initial control is completed when it judges the icemaker cube mould is horizontal.

5. Ice ejection conducts for 1 cycle irrespect of ice in the ice bin when power is initially applied.

2-2. Water Supply Control Function

1. This is to supply water into the icemaker cube mould by operating water valve in the machine room when ice ejection control is completed and icemaker mould is even.

2. The quantity of water supplied is determined by DIP switch and time.

3. If water supply quantity setting is changed while power is on, water supplies for the amended time. If DIP switch is changed during water supply, water shall be supplied for the previous setting time. But it will supply for the amended time from the next supply.

4. When water supply signal is applied to water and ice valves at the same time during water supply, water shall be supplied to water valve. If water supply signal is applied to ice valve during water supply, water shall be supplied to both water and ice valves.

2-3. Icemaking Control Function

1. Icemaking control is carried out from the completion of water supply to the completion of icemaking in the cube mould. Icemaking sensor detects the temperature of cube mould and completes icemaking. (icemaking sensor is fixed below icemaker cube mould)

2. Icemaking control starts after completion of water supply control or initial control.

3. It is judged that icemaking is completed when icemaking sensor temperature reaches at -8°C[18°F] after 100 minutes when water is supplied to icemaker cube mould.

4. It is judged that icemaking is completed when icemaker sensor temperature reaches below -12°C[10°F] after 20 minutes in condition 3.

ICEMAKER AND DISPENSER OPERA TION PRINCIPLE AND REPAIR METHOD

- 62 -

DIP SWITCH SETTING

SWITCH 1 SWITCH 2 SWITCH 3

WATER SUPPLY TIME REMARKS

1 OFF OFF OFF 6.5 Sec. 2 ON OFF OFF 5.5 Sec. 3 OFF ON OFF 6 Sec. 4 ON ON OFF 7 Sec. 5 OFF OFF ON 7.5 Sec. 6 ON OFF ON 8 Sec. 7 OFF ON ON 9 Sec. 8 ON ON ON 10 Sec.

* The quantity of water supplied

depends on DIP switch setting conditions and water pressure as it is a direct tap water connection type. (the water supplied is generally 80 cc to 120 cc)

* DIP switch is on the main PWB.

2-4. Ice Ejection Control Function

1. This is to eject ice from icemaker cube mould after icemaking 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. If the ice bin is full, ice ejection motor rotates in normal direction in every hour to check the condition of ice bin. If the ice bin is not full, the water supply control starts after completion of ice ejection control. If the ice bin is full, ice ejection motor rotates in reverse direction and stops under icemaking or waiting conditions.

3. If ice bin is not full, ice ejection starts. The cube mould tilts to the maximum and ice is separated from the mould and ice checking lever raises.

4. Ice ejection motor stops for 1 second if Hall IC signal changes from OFF (low) to ON (high) after 3.6 seconds when ice ejection motor rotates in normal direction. If there is no change in Hall IC signals within 1 minute after ice ejection motor operates, ice ejection motor stops as ice ejection motor or hall IC is out of order.

5. If ice ejection motor or Hall IC is abnormal, ice ejection motor rotates in normal direction to exercise initial operation. It resets the icemaker if ice ejection motor or Hall IC is normal.

6. The mould stops for 1 second at maximum tilted conditions.

7. The mould returns to horizontal conditions as ice ejection motor rotates in reverse direction.

8. When the mould becomes horizontal, the cycle starts to repeat: Water Supply → Icemaking → Ice Ejection → Mould Returns to Horizontal

ICEMAKER AND DISPENSER OPERA TION PRINCIPLE AND REPAIR METHOD

- 63 -

Bin is

not full

HALL IC

OUTPUT

SIGNALS

Bin is

full

HALL IC

OUTPUT

SIGNALS

ICE CHECKING

AXIS

ICE CHECKING LEVEL 30°

Maximum tilting

point

Icemaking

(Original point)

Lock

2±1 sec

9±3 sec 8±3 sec

Ice Checking Ice Ejection

Lock

Horizontal

Conditions

Level Retrun

Conditions

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 Icemaker. The test function starts when the test switch is pressed for more than 0.5 second.

2. Test button does not work during ice ejection and water supply. It works when it is in the horizontal conditions. If mould is full of ice during test function operation, ice ejection control and water supply control do not work.

3. When test switch is pressed for more than 0.5 second in the horizontal conditions, ice ejection starts irrespect of the mould conditions. Water shall be splashed if test switch is pressed before the water in the mould freezes. Water shall be supplied while the mould returns to the horizontal conditions after ice ejection. Therefore the problems of ice ejection, returning to the horizontal conditions, and water supply can be checked by test switch. When test function performs normally, the buzzer sounds and water supply shall carry out. Check it for repair if buzzer does not sound.

4. When water supply is completed, the cycle operates normally as follows: Icemaking → Ice ejection → Returning to horizontal conditions → Water supply

5. Remove ice from the icemaker cube mould and press test switch when icemaker cube mould is full of ice as ice ejection and water supply control do not work when cube mould is full of ice.

2-6. Other functions relating to freezer compartment door opening

1. When freezer door is open, ice dispenser stops in order to reduce noise and ice drop.

2. When freezer door is open during ice ejection and cube mould returning to horizontal condition, ice ejection and cube mould level return proceed.

3. When freezer door is open, geared motor and cube ice solenoid immediately stop and duct door solenoid stops after 5 seconds.

4. Water dispenser stops in order to protect water drop when freezer door is open.

5. Test function operates normally irrespect of refrigearator compartment door opening.

ICEMAKER AND DISPENSER OPERA TION PRINCIPLE AND REPAIR METHOD

- 64 -

3. Icemaker Troubleshooting

* Troubleshooting: it is possible to confirm by pressing freezer and refrigerator temperature control buttons for more

than 1 second. (Icemaker is normal if all leds are on): refer to trouble diagnposis function in MICOM function 2-8 (page 18)

ICEMAKER AND DISPENSER OPERA TION PRINCIPLE AND REPAIR METHOD

- 65 -

Yes

Is DC Power (5V and 12V)

output normal?

Failed DC Power

• Check DC power (5V, 12V).

Change main PWB

Is cube ice LCD off during

troubleshooting check?

Failed Icemaking sensor

• Check the resistance of both ends (1,2) of icemaking sensor of CON9.

• Defects between icemaking sensor and board (Pin No. 60 of IC1)

Replace Icemaking Sensor

Is Crushed Ice LCD off during

troubleshooting check?

Failed Icemaker Unit

• Is the resistance of both ends 9,10 of ice ejection motor of CON9 between 18 and 22Ω?

• Is ice ejection motor drive circuit (IC11 and peripheral circuits) normal?

• Defects between Hall IC and Board (Pin No. 42 of IC1).

• Confirm ice ejection and level return when pressing test switch.

Replace Icemaker Unit

Replace Main PWB

Are ice

ejection and level return

normal when test switch is

pressed for more than 0.5 second?

Does the bell

sound once?

Failed Icemaker unit test switch

• Are both ends 5,6 of CON9 test switch open?

• Defects between test switch and board (Pin No. 38 of IC1).

• Are both ends (3,4) of CON9 Icemaker stop switch short?

Replace Icemaker Unit

Replace water supply valve

• Is power applied to water supply valve?

• Does the water supply valve work normally?

• Is the water supply line normally connected?

Poor water supply

Is water suppy normal

after Ice ejection and level return

by ice ejection motor?

Normal

4. Icemaker circuit part

The above icemaker circuit is applied to the GR-P247/207, GR-L247/207 and consists of the icemaker unit part installed at the freezing room and the icemaker driving part of the main PWB.

Water supply to the icemaker container is done by opening the valve for the established water supply time by operating the container via a solenoid relay for the ice valve of the solenoid valve placed at the M/C room. If the water supply time is elapsed, water supply is automatically stop. This circuit is a circuit for implementing function such as ice removal, ice-full detection, horizontal balancing and sense of icemaking temperature for the icemaker container. Since icemaking temperature sense is same as in the temperature sense circuit part of the main PWB, refer to it.

Test switch input detection of the icemaker is same as in the door switch input detection circuit of the main PWB.

1. This function is used in operation test, service execution and cleaning etc and performed if pressing the test switch installed at the automatic icemaker itself for more than 0.5 second.

2. The test switch operates in the horizontal status and test function is not input in the water supply operation. Ice removal control and water supply control is not performed if full-ice is arrived during the operation of test function.

3. If pressing the test switch for 0.5 second or more in the horizontal status, ice removal operation is immediately performed irrespective of the generation conditions of ice at the icemaking tray. Therefore, care is required since water may overflow if operating test function in the water state that icemaking is not done. A cycle of water supply is performed in the horizontal balancing operation after ice removal operation. Therefore, you can check any problem of ice removal operation, horizontal operation and water supply. In this case, if test function is normally performed, Ding~ buzzer sound rings and water supply control is performed. Thus, no ringing of Ding~ buzzer sound means failure and repair check must be performed.

4. If water supply is completed, operation in the normal cycle of icemaking → ice removal → returning to horizontal

status → water supply.

ICEMAKER AND DISPENSER OPERA TION PRINCIPLE AND REPAIR METHOD

- 66 -

CIRCUIT

- 67 -

CIRCUIT

- 68 -

1. TROUBLE SHOOTING

TROUBLE DIAGNOSIS

- 69 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

1. Faulty start

1) No power on outlet.

2) No power on cord.

3) Shorted start circuit.

4) During defrost.

* Measuring instrument :

Multi tester

■Check the voltage. If the voltage is within ±85% of the rated voltage, it is OK.

■ Check the terminal movement.

■

Check both terminals of power cord. Power conducts : OK. No power conducts : NG

■ Check both terminals of OLP. If power conducts : OK. If not : NG.

■ Check the resistance of both terminals. At normal temperature 6 : OK. If disconnected : ∞.

Bad connection between adapter and outlet. (faulty adapter)

The Inner diameter of adapter. The distance between holes. The distance between terminals. The thickness of terminal.

Bad connection between plug and adapter (faulty plug).

The distance between pins. Pin outer diameter.

No power on power cord.

O.L.P is off.

No electric power on compressor. - Faulty compressor .

Faulty PTC.

Disconnected copper wire.

Internal electrical short. Faulty terminal contact.

Disconnected.

Capacity of O.L.P is small. Characteristics of O.L.P is bad. Bad connection.

Power is disconnected.

Inner Ni-Cr wire blows out. Bad internal connection. Faulty terminal caulking (Cu wire is cut). Bad soldering.

Weak connection. Short inserted cord length. Worn out tool blade.

Loose contact.

- Large distance between male terminal.

- Thin female terminal.

T erminal disconnected. Bad sleeve assembly .

Power cord is disconnected. Faulty soldering.

Start automatic defrost. Cycle was set at defrost when the refrigerator

was produced.

Power does not conduct. - Damage. Bad characteristics. - Initial resistance is big. Bad connection with

compressor. Bad terminal connection.

T oo loose. Assembly is not possible.

TROUBLE DIAGNOSIS

- 70 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

2. No cooling.

2) Refrigeration system is clogged.

■Check the clogged evaporator by heating (as soon as the cracking sound begins, the evaporator start freezing)

■ The evaporator does not cool

from the beginnig (no evidece of moisture attached). The evaporator is the same as before even heat is applied.

Moisture clogged.

No electric power on thermostat.

Weld joint clogged.

Drier cloggeing.

Foreign material clogging.

Residual moisture

in the evaporator.

Residual moisture.

Insufficient drier capacity.

Residual moisture in pipes.

Moisture penetration - Leave it in the air. - Moisture penetration. into the refrigeration oil.

Caps are missed.

Air blowing.

During transportation. During work.

Not performed. Performed.

T oo short time. Low air pressure. Less dry air.

Air Blowing.

Leave it in the air. Caps are missed.

Short pipe insert. Pipe gaps.

T oo much solder .

T oo large. Damaged pipes.

Not dried in the compressor. Elapsed more than 6 months after drying Caps are missed. No pressure when it is open.

During rest time. After work.

Compressor cap is disconnected. Foreign materials are in the pipe.

Not performed. T oo short. Impossible moisture

confirmation. Low air pressure.

Dry drier - Drier temperature. Leave it in the air.

The capillary tube inserted depth. - T oo much. Capillary tube melts. - Over heat. Clogged with foreign materials.

Reduced cross section by cutting. - Squeezed.

Desiccant powder. Weld oxides. Drier angle.

Check on package condition.

Good storage after finishing.

TROUBLE DIAGNOSIS

- 71 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration is weak.

Plate heater

Cord heater

1) Refrigerant Partly leaked.

2) Poor defrosting capacity. Drain path (pipe) clogged.

Defrost heater does not generate heat.

Weld joint leak. Parts leak.

Inject P/U into drain hose.

Foreign materials penetration.

Cap drain is not disconnected.

Inject through the hole.

Seal with drain.

P/U lump input. Screw input. Other foreign materials

input.

Parts disconnected.

Wire is cut.

- Heating wire.

- Contact point between heating and electric wire.

Dent by fin evaporator. Poor terminal contacts.

Wire is cut.

- Lead wire.

- Heating wire.

- Contact point between heating and electric wire.

Heating wire is corroded

- Water penetration.

Bad terminal connection.

■Check visually.

■Check terminal

Conduction: OK. No conduction: NG. If wire is not cut, refer to resistance. P=Power V=Voltage R=Resistance

P= —

R= —

- 72 -

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration is weak.

3) Cooling air leak.

4) No cooling air circulation.

Residual frost.

No automatic defrosting. Defrost does not return.

Bad gasket adhestion

Door sag.

Faulty fan motor.

Weak heat from heater.

Bad heater assembly .

T oo short defrosting time. Defrost Sensor.

- Faulty characteristics. Seat-D(missing, location. thickness).

Structural fault. Gasket gap.

Air inflow through the fan motor. Bad insulation of case door.

Sheath Heater - rated. Heater plate - rated. Heater cord-L - rated.

Heater plate

Heater cord-L

Gap. Bad attachment. Contraction.

Bad adhesion. Weak binding force at hinge.

Fan motor.

Door switch.

Self locked. Wire is cut. Bad terminal contact.

Contact distance. Button pressure. Melted contact. Contact.

Poor door attachment. Door liner (dimension). Contraction inner liner. Misalignment. Bad terminal connection. P/U liquid leak.

Faults.

Refrigerator and freezer switch reversed. Button is not pressed.

No contact to drain. Loosened stopper cord.

Not contact to the evaporator pipe.

Location of assembly (top and middle).

■Check the fan motor conduction: OK. No conduction: NG.

TROUBLE DIAGNOSIS

- 73 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration is weak.

4) No cooling air circulation.

5) Compressor capacity.

6) Refrigerant too much or too little.

7) Continuous operation

- No contact of temperature controller. - Foreign materials.

8) Damper opens continuously.

Foreign materials jammed.

Failed sensor. - Position of sensor. Characteristics

of damper.

9) Food storing place. - Near the outlet of cooling air.

Faulty fan motor.

Small cooling air discharge.

Fan is constrained.

Insufficient motor RPM

Faulty fan.

Shorud. Bent. Ice and foreign materials on rotating parts.

Fan shroud contact. - Clearance. Damping evaporator contact. Accumulated residual frost.

Fan misuse. Bad shape. Loose connection. - Not tightly connected. Insert depth.

Rating misuse. Small capacity. Low valtage.

Malfunction of charging cylinder. Wrong setting of refrigerant. Insufficient compressor. - Faulty compressor.

Fan overload. - Fan misuse. Bad low termperature RPM characteristics. Rated power misuse. Low voltage.

P/U liquid dump. EPS water sediment. Screw.

Bad characteristics of its own temperatue. Parts misuse. Charge of temperature - Impact.

characteristics.

■Check visually after disassembly.

TROUBLE DIAGNOSIS

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CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

4. Warm refrigerator compartment temperature.

5. No automatic operation. (faulty

contacts.)

6. Condensation and ice formation.

1) Colgged cooling path.

2) Food storate.

1) Faulty temperature sensor in freezer or refrigerator compartment.

2) Refrigeration load is too much.

3) Poor insulation.

4) Bad radiation.

5) Refrigerant leak.

6) Inadequate of refrigerant.

7) Weak compressor discharging power.

8) Fan does not work.

9) Button is positioned at strong.

1) Ice in freeezer compartment.

2) Condensation in the refrigerator compartment.

3) Condensation on liner foam.

P/U liquid leak. Foreign materials. –– P/U dump liquid.

Faulty contact. Faulty temperature characteristics.

External air inflow. –– Bushing installed incorrectly . Door opens but not closes.

Gap around gasket. –– Contraction, distortion, loose, door twisted, corner not

fully inserted.

Food vapor. –– Storing hot food. –– Unsealed food.

Door opens but not closes.

Gasket gap.

Cool air leak and transmitted.

High ambient temperature. Space is secluded.

Different rating. Small capacity.

Store hot food. Store too much at once. Door open. Packages block air flow.

Food. Frequent opening and closing.

Cool air leak. Poor door close. – Partly opens.

T oo much food. Hot food.

Weak door closing power . Stopper malfunction. Door sag. Food hinders door closing.

Insufficient closing. Door sag. Food hinders door closing.

T oop table part. Out plate R/L part.

Not fully filled.

Flange gap. –– Not sealed. Gasket gap.

■Inspect parts measurements and check visually.

TROUBLE DIAGNOSIS

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CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

6. Condensation and ice formation.

7. Sounds

4) Condensation on door. Condensation on the duct door. - Duct door heater is cut. Condensation on the

dispense recess.

Condensation on the Not fully filled. Surface. door surface. Cormer.

P/U liquid contraction.

Condensation on the gasket surface.

5) Water on the floor. Condensation in the refrigerator compartment. Defrosted water overflows. Clogged discharging hose. Discharging hose Evaporation tray located at wrong place. location. Tray drip. Damaged.

Breaks, holes. Small Capacity.

Position of drain.

1) Compressor compartment operating sounds. Compressor sound Sound from machine itself.

inserted. Sound from vibration.

Restrainer. Bushing Too hard. seat. Distorted.

Aged. Burnt.

Stopper. Bad Stopper Not fit

assembly. (inner

diameter

of stopper). Tilted. Not

Compressor base not connected. Bad welding compressor stand fallen. Foreign materials in the compressor

compartment.

OLP

sound.

Chattering

sound.

Insulation paper vibration.

Capacitor noise.

Pipe contacts each other. – Narrow interval.

Pipe sound. No vibration damper.

Damping Bushing-Q. Damping Bushing-S.

Capillary tube unattached.

Recess Heater is cut. Duct door is open. / Foreign material clogging.

Bad wing adhesion. Wing sag(lower part).

Door liner shape mismatch.

Corner. T oo much notch.

Broken.

Home Bar heater is cut.

Liquid shortage. Liquid leak.

TROUBLE DIAGNOSIS

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CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

7. Sounds

1) Compressor compartment operating sounds. Transformer

sound.

Drip tray vibration sound.

Back cover machine sound.

Condenser drain sound.

2) Freezer compartment sounds. Fan motor sound.

Sounds from fan contact.

Unbalance fan sounds.

Motor shaft contact sounds.

Resonance. Evaporator noise.

3) Bowls and bottles make contact on top shelf.

4) Refrigerator roof contact.

5) Refrigerator side contact.

6) Insufficient lubricants on door hinge.

Its own fault. –– Core gap. Bad connection. –– Correct screw connection.

Bad assembly. Distortion. Foreign materials inside.

Bad connection. Partly damaged.

Not connected. Bad pipe caulking.

Normal operating sound. Vibration sound.

Aged bushing seat. Bad torque for assembling motor bracket.

Fan guide contact. Shroud burr contact. Damping evaporator contact. Residual frost contact.

Unbalance.

Ice on the fan. –– Air intake (opposite to motor

bushing assembly.)

Supporter disorted. Tilted during motor assembly .

Evaporator pipe contact. –– No damping evaporator. Sound from refrigerant. –– Stainless steel pipe shape in

accumulator. Sound from fin evaporator and pipe during expansion and contraction.

Damaged heater cord. Narrow evaporator interval.

Surface machining conditions. Fan distortion. Misshappen. Burr.

TROUBLE DIAGNOSIS

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CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

8. Faulty lamp (freezer and

refrigerator compartment).

9. Faulty internal voltage short.

1) Lamp problem. Filament blows out. Glass is broken.

2) Bad lamp assembly. Not inserted. Loosened by vibration.

3) Bad lamp socket.

Disconnection. Bad soldering.

Bad rivet contact.

Short. Water penetration. Low water

level in tray.

Bad elasticity of contact. Bad contact corrosion.

4) Door switch. Defective.

Refrigerator and freezer switches are reversed. Travlel distance. Bad connection. Bad terminal contact. P/U liquid leak.

1) Lead wire is damaged.

Wire damage when assembling PTC Cover. Outlet burr in the bottom plate. Pressed by cord heater, lead wire, evaporator pipe.

2) Exposed terminal.

Compressor Compartment terminal. - Touching other

components.

Freezer compartment terminal. - Touching evaporator pipe.

3) Faulty parts.

Transformer. Coil contacts cover.

Welded terminal parts contact cover. Compressor. Bad coil insulation. Plate heater. Melting fuse. Sealing is broken. Moisture penetration. Cord heater. Pipe damaged. Moisture penetration.

Bad sealing. Sheath heater.

■Connect conduction and non-conduction parts and check with tester. Conduction: NG. Resistance∞: OK.

TROUBLE DIAGNOSIS

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CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

10. Structure, appearance and others.

1) Door foam. Sag.

Noise during operation.

Malfunction.

2) Odor. Temperature of

refrigerator compartment.

Deodorizer.

Food Storage.

Others.

Hinge loose

Weak gasket adhesion. Fixed tape.

Hinge interference.

Not closed Interference between door liner and inner liner. Refrigerator compartment is opened when freezer compartment is closed (faulty stopper).

High. Faulty damper control.

Button is set at weak. Door is open (interference by food).

No deodorizer. Poor capacity.

Seal condition. Store special odorous food. Long term storage.

Odors from chemical procucts.

Bigger door foam. Hinge-Pin tilted-Poor flatness. No washer. No grease.

Stopper worn out. Bad freezer compartment door assembly. No stopper.

Bolt is loosened during transportation. Not tightly fastened. Screw worn out . Adhesion surface.

Not well fixed.

2. Faults

2-1. Power

2-2. Compressor

TROUBLE DIAGNOSIS

-79-

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. - Reconnect the connecting parts. and adapter.

Fuse blows out. - Short circuit by wrong connection. - Check the fuse with tester - Find and remove the cause of - Replace with rated

- Low voltage products are or visually. problem(ex. short, high voltage, fuse after confirming connected to high voltage. - Check the input volt are with tester low voltage). its specification.

- Short circuit by insects. (between power cord and products). - Replace with rated fuse.

- Electricity leakage. - Check the resistance of power cord ■ If fuse blowns out

- High voltage. with testerf (if it is 0Ω, it is shorted). frequently, confirm

- Short circuit of components the cause and prevent. (tracking due to moisture and dust

penetration).

Problems Causes Checks Measures Remarks

Compressor - Faulty PTC. - Check the resistance. - If resistance is infinite, replace it does not Vlaue:∞ is defective. with new one. operate. - If it is not infinite, it is normal.

- Check other parts.

- Compressor is frozen. - If compressor assembly parts are - During forced operation:

normal(capacitor, PTC, OLP), - Operates: Check other parts. apply power directly to the - Not operate: Replace the frozen compressor to force operation. compressor with new one, weld,

evacuate, and recharge refrigerant.

OLP It starts as soon as it is • Refer to weld repair procedures.

contacted.

Auxiliary winding Main winding

Power

2-3. Temperature

TROUBLE DIAGNOSIS

-80-

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 0Ω: short. compartment. ∞Ω: cut. - Reconnect and reinsert.

- Rotate rotor manually and check rotation.

- Wire is cut.

- Bad terminal contact: Check - Maintain clearance and remove ice terminal visually. (Repair and/or replace shroud if fan

- Fan constraint. – Fan shroud is constrained by shroud

contact: Confirm deformation). visually.

– Fan icing:

Confirm visually.

Faulty fan motor due to faulty door - Iced button (faulty) operation: - Confirm icing causes and repair. switch operation. Press button to check - Replace door switch.

- Faulty button pressure and contact: Press button to check operation.

- Door cannot press door switch - Door sag: fix door. button: Check visually. - Door liner bent:replace door or

attach sheets.

Bad radiation conditions in - Check the clearance between the - Keep clearance between - The fan may be compressor compartment. refrigerator and wall (50 mm in refrigerator and walls (minimum broken if cleaning

minimum). 50mm). performs while the

- Check dust on the grill in - Remove dust and contaminants refrigerator is on. compressor compartment. from grill for easy heat radiation.

- Check dust on the coils condenser. - Remove the dust with vacuum

cleaner from the coils condenser while the refrigerator is off.

2-4. Cooling

TROUBLE DIAGNOSIS

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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. auxiliary in the compressor

compartment (high pressure side).

2. Check the end of compressor sealing pipe (low pressure side).

3. Check silver soldered parts. (Cu + Fe / Fe + Fe).

4. Check bending area of wire condenser pipe in compressor compartment (cracks can happen during bending).

5. Check other parts (compressor compartment and evaporators in freezer compartment).

Shortage of refrigerant. Check frost formation on the surface - Find out the leaking area, repair, Drier must be replaced.

of evaporator in the freezer evacuate, and recharge the compartment. refrigerant.

- If the frost forms evenly on the - No leaking, remove the remaining

surface, it is OK. refrigerant, and recharge new

- If it does not, it is not good. refrigerant.

TROUBLE DIAGNOSIS

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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. If it is warm, it is OK. Remove the causes of clogging,

If it is not, compressor discharging weld, evacuate, and recharge joints might be clogged. the refrigerant.

2. Manually check whether hot line - If it's warm, it's OK. If it's not, pipe is warm. condenser discharging line weld If it is warm, it's OK. joints might be clogged. If it is not, condenser outlet weld Disconnect with torch, remove the joints might be colgged. causes, evacuate, and recharge

seal refrigerant.

Leak at loop pipe weld joint Check sequence. Replace the compressor, weld, Drier must be replaced. (discharge) in compressor. 1. Manually check whether evacuate, and recharge refrigerant.

condenser is warm, It is not warm and the frost forms partly on the evaporator in the freezer compartment.

Faulty cooling fan in the compressor Check sequence. - Replace if motor does not operate. compartment. 1. Check cooling fan operation. - If fan is disconnected, check fan

2. Check that cooling fan is damage and reassemble it. disconnected from the motor. ■ Refer to fan motor disassembly

and assembly sequence.

2-5. Defrosting failure

TROUBLE DIAGNOSIS

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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 0Ω: Short. ∞Ω: Cut. • Parts replacement: Refer to parts insulation tape and heat is shorted. Tens to thousands Ω: OK. explanations. contraction tube if the cut

1) Heating wire is damaged when 2. Check the resistance between lead wire is accessible to inserting into the evaporator. housing terminal and heater repair.

2) Lead wire of heater is cut. surface.

3) Heating wire at lead wire contacts 0Ω: Short. ∞Ω: Cut. is cut. Tens to thousands Ω: Short.

Sucking duct and discharging hole 1. Confirm foreign materials. In case 1) Push out impurities by inserting are clogged: of ice, insert the copper line copper wire.(Turn off more than

1. Impurities. through the hole to check. 3hours and pour in hot water if

2. Ice. 2. Put hot water into the drain frost is severe.)

(check drains outside). 2) Put in hot water to melt down frost.

3) Check the water outlet.

4) Push the heater plate to sucking duct manually and assemble the disconnected parts.

Gap between Suction duct and 1. Confirm in the Suction duct. 1) Turn off the power, confirm Heater plate Ice in the gap. impurities and ice in the gap, and

supply hot water until the ice in the gap melts down.

2) Push the Heater plate to drain

bottom with hand and assemble the disconnected parts.

Wrong heater rating (or wrong 1. Check heater label. Faults:replace. assembly). 2. Confirm the capacity after - How to replace: Refer to main parts.

substituting the resistance value into the formula.

(V: Rated voltage of user country) (R: Resistance of tester[Ω]) Compare P and lavel capacity. Tolerance: ±7%

P= ––

TROUBLE DIAGNOSIS

-84-

Problems Causes Checks Measures Remarks

No defrosting Melting fuse blows. - Check melting fuse with tester. - Faullty parts: parts replacement.

1) Lead wire is cut. If 0Ω: OK. - Check wire color when maeasuring

2) Bad soldering. If ∞Ω: wire is cut. resistance with a tester. Ice in the Suction duct. 1. Check the inner duct with mirror. 1) Turn power off.

1) Icing by foreign materials in the 2) Raise the front side(door side), duct. support the front side legs, and let

2) Icing by cool air inflow through the ice melt naturally. (If power is the gap of heater plate. on, melt the frost by forced

3) Icing by the gap of heater plate. defrosting.)

2. Check by inserting soft copper 3) Reassemble the heater plate. wire into the duct (soft and thin copper not to impair heating wire).

Bad cool air inflow and discharge, 1. Turn on power, open or close the 1) Check the faulty connector of and bad defrosting due to faulty door, check that motor fan housing and reassemble wrongly contact and insertion (bad connector operates (If it operates, motor fan assembled parts. insertion into housing of heater, is OK). 2) If the parts are damaged, melting, fuse and motor fan). 2. Disconnect parts in the refrigerator remove the parts and replace it

compartment, check the connection

with a new one. around the housing visually, defrost, and confirm heat generation on the heater. Do not put hands on the sheath heater.

3. Check the parts which have faults described in 1, 2 (mechanical model: disconnect thermostat from the assembly).

2-6. Icing

TROUBLE DIAGNOSIS

-85-

Problems Causes Checks Measures Remarks

- Check the defrost related parts if problem is caused by faulty defrosting.

- Replacement should be done when it cannot be repaired.

- Moisture does not Freeze on the evaporator but can be sucked into the refrigerator, where it condenses and freezes. This interferes with cold air circulation and sublimation of he ice.

Icing in the refrigerator compartment.

- Damper icing.

- Pipe icing.

- Discharging pipe icing.

1) Bad circulation of cool air.

- Clogged intake port in the refrigerator compartment.

- Sealing is not good.

- Too much food is stored and clogs the discharge port.

- Bad defrosting.

2) Faulty door or refrigerator compartment.

- Faulty gasket.

- Faulty assembly.

3) Overcooling in the refrigerator compartment.

- Faulty damper in the refrigerator compartment.

- Faulty MICOM (faulty sensor)

4) Bad defrosting

- Heater wire is cut.

- Defective defrost sensor.

- Defrosing cycle.

5) Customers are not familiar with this machine.

- Door opens.

- High temperature, high moisture, and high load.

- Check the food is stored properly (check discharge and intake port are clogged).

- Check icing on the surface of baffle and cool air path (pipe) after dissembling the container box.

- Check icing at intake ports of freezer and refrigerator compartment.

- Check gasket attached conditions.

- Check door assembly conditions.

- Check refrigerator compartment is overcooled (when button pressed on weak).

- Check parts are faulty.

- Check frost on the evaporator after dissembling shroud and fan grille.

- Check ice on intake port of freezer and refrigerator compartment.

- Check food interferes with door closing.

- Check ice on the ceilings.

- Be acquainted with how to use.

- Sealing on connecting parts.

- Check the damper and replace it if it has defects.

- Check defrost. (After forced defrosting, check ice in the evaporator and pipes.)

- Correct the gasket attachment conditions and replace it.

- Door assembly and replacement.

- Replace faulty parts.

- Check parts related to defrosting.

- Check defrosting. (Check ice on the evaporator and pipe.)

- Be acquainted with how to use.

TROUBLE DIAGNOSIS

-86-

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 clogged in the freezer visually.(Check clogging at intake - Check defrost (Check ice on the to defrosting if the

- Surface of fan compartment. and discharging port of cooling air.) evaporator and pipes after forced problem is caused by grille. - Discharging port is Clogged. - Check food occupation ratio in defrosting). the faulty defrosting.

- Wall of freezer - Too much food is stored. volume(Less than 75%). compartment. - Bad defrosting. - Check frost on the evaporator after

- Cool air dissembling shroud and fan grille. discharging port.

- Check icing at intake port of

- Basket(rack) refrigerator compartment. area.

- Food surface. 2) Bad freezer compartment door - Check gasket attachment - Correct the gasket attachement - Replace when it can not

- Icing in the - Faulty gasket conditions. conditions and replace it. be repaired. shute. - Faulty assembly - Check door assembly conditions. - Door assembly and replacement.

3) Over freezing in the freezer - Refrigerator operates pull down. -Replace defective parts. compartment. (Check if it is operated

- Faulty MICOM. intermittently)

- The Temperature of freezer compartment is satisfactory, but over freezing happens in the refrigerator compartment even though the notch is set at weak.

4) Bad defrosting. - Check frost on the evaporator after - Check parts related to defrosting.

- Heater wire is cut. dissembling shroud and grille. - Check defrosting. Check ice on the

- Faulty defrost sensor. - Check ice on the intake port in the evaporator and pipes after forced

- Defrosting cycle refrigerator compartment. defrosting.

5) User is not familiar with how to - Check food holds door open. - Be acquainted with how to use. use. - Check ice on the ice tray.

- Door opens.

- High moisture food water is stored.

2-7. Sound

TROUBLE DIAGNOSIS

-87-

Problems Causes Checks Measures Remarks

Hiss sound 1. Loud sound of compressor

operation.

2. Pipes resonate sound which is connected to the compressor.

3. Fan operation sound in the freezer compartment.

4. Fan operation sound in the compressor compartment.

1.1 Check the level of the refrigerator.

1.2 Check the bushing seat conditions (sagging and aging).

2.1 Check the level of pipes connected to the compressor and their interference.

2.2 Check bushing inserting conditions in pipes.

2.3 Touch pipes with hands or screw-driver (check the change of sound).

3.1 Check fan insertion depth and blade damage.

3.2 Check the interference with structures.

3.3 Check fan motor.

3.4 Check fan motor bushing insertion and aging conditions.

4.1 Same as fan confirmation in the refrigerator.

4.2 Check drip tray leg insertion.

4.3 Check the screw fastening conditions at condenser and drip tray.

1) Maintain horizontal level.

2) Replace bushing and seat if they are sagged and aged.

3) Tuch the piping at various place along is route. Install a damper at the point where your tuch reduces the noise.

4) Avoid pipe interference.

5) Replace defective fan and fan motor.

6) Adjust fan to be in the center of the fan guide.

7) Leve a clearance between interfering parts and seal gaps in the structures.

8) Reassemble the parts which make sound.

9) Leave a clearance if evaporator pipes and suction pipe touch freezer shroud.

TROUBLE DIAGNOSIS

-88-

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. Check light food and container vibration is severe. tube touching in the compressor. on the shelves. 2) Leave a clearance where parts compartment. 2-1. Touch pipes in the compressore interfere with each other.

3. Compressor stopper vibration. compartment with hands. 3) Reduce vibration with bushing

4. Moving wheel vibration. 2-2 Check capillary tube touches and restrainer if it is severe.

5. Other structure and parts cover back. (especially, compressor and pipe). vibration. 3-1 Check compressor stopper 4) Replace compressor stopper if it

vibration. vibtates severely.

4-1 Check vibration of front and rear

moving wheels.

5-1 Touch other structures and parts.

Irregular sound. 1. It is caused by heat expansion 1-1 Check time and place of sound 1)

Explain the principles of refrigeration

Click. and contraction of evaporator, sources.

and that the temperature difference

shelves, and pipes in the

between operation and defrosting

refrigerator.

can make sounds.

If evaporator pipe contacts with other structures, leave a clearance between them (freezer shroud or inner case).

TROUBLE DIAGNOSIS

-89-

Problems Causes Checks Measures Remarks

Sound Popping 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. sound). starts operation after forced defrosting. - If it is continuous and servere, insert

- Check the restrainer attachment capillary tube again (depth 15±3mm)

conditions on the evaporator and - Fasten the capillary tube to suction capillary tube weld joints. pipes or detach in the compressor

compartment.

- Explain the principles of freezing cycles.

Water boiling or It happens when refrigerant passes - Check the sound when compressor is - Explain the principles of freezing cycles flowing sound. orifice in accumulator internal pipes by turned on. and refrigerant flowing phenomenon by

the pressure difference between - Check the sound when compressor is internal pressure difference. condenser and evaporator. turned off. - If sound is servere, wrap the

accumulator with foam and restrainer.

Sound of whistle When door closes, the internal pressure - Check the sound by opening and - Broaden the cap of discharge hose for when door of the refrigerator decreases sharply closing the refrigerator or freezer doors. defrosting in the compressor closes. below atomosphere and sucks air into compartment.

the refrigerator, making the whistle - Seal the gap with sealant between out sound. and inner cases of hinge in door.

2-8. Odor

TROUBLE DIAGNOSIS

-90-

Problems Causes Checks Measures Remarks

Food Odor. Food (garlic, kimchi, etc) - Check the food is not wrapped. - Dry the deodorizer in a sunny place

- Check the shelves or inner with adequate ventilation. wall are stained with food juice. - Store the food in the closed

- Check the food in the vinyl wraps. container instead of vinyl wraps.

- Chedk food cleanliness. - Clean the refrigerator and set

button at strong.

Plastic Odor. Odors of mixed food and plastic - Check wet food is wrapped with - Clean the refrigerator.

odors. plastic bowl and bag. - Persuade customers not to use

- It happens in the new refrigerator. plastic bag or wraps with wet food

or odorous foods.

Odor from the Odor from the old deodorizer. - Check the deodorizer odors. - Dry the deodorizer with dryer and *Deodorizer : option deodorizer. then in the shiny and windy place.

- Remove and replace the deodorants.

2-9. Micom

TROUBLE DIAGNOSIS

-91-

Problems Symptom Causes Checks Measures Remarks

Bad PCB electric power.

All display LCD are off.

Abnormal display LCD operation

Bad connection between Main PCB and display circuit.

Defective PCB transformer.

DefectivePCB electric circuit parts.

Bad connection between Main PCB and display circuit.

Defective LCD.

Bad connector connection from main PCB to display PCB.

PCB transformer winding is cut.

PCB transformer temperature fuse is burnt out.

Defective regulator IC (7812, 7805).

PCB electric terminal fuse is burnt out.

STR Parts are damaged.

Lead Wire connecting main PCB and display PCB is cut or connector terminal connection is bad.

Defective LCD.

Visual check on connector connection.

Check resistance of PCB transformer input and output terminals with a tester. (If resistance is infinity, trans winding is cut).

Check voltage at input/output terminals.

Check fuse in PCB electric terminal with a tester.

Check if STR No. 2 and 3 pins are cut when power is off.

Check Lead Wire terminals connecting Main PCB and display PCB with a tester.

Check if all LCD are on when Main PCB Test switch is pressed (or when both freezer key and power freezer key are pressed at the same time for more than one second.)

Reconnect connector.

Replace PCB transformer or PCB.

Replace regulator.

Replace PCB fuse.

Replace parts.

Reconnect Lead Wire and directly connect defective contact terminal to Lead Wire.

Replace display PCB.

Applicable to model without dispenser.

Refer to electric circuit in circuit explanation.

Applicable to model with dispenser.

Refer to display circuit in circuit explanation.

TROUBLE DIAGNOSIS

-92-

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 CON2 Replace relay RY1 Refer to load

driving relay. (3&9) after pressing main PCB and RY2 or PCB. driving circuit in

test switch once. It is OK if circuit voltage is normal. explanation.

Defective freezer Defective Freezer Check resistance of freezer Replace freezer Refer to sensor. sensor parts. sensor with a tester. sensor. resistance

characteristics table of sensor in

circuit Freezer sensor is Confirm the color of sensor in Repair main PCB explanation. substituted for other circuits (main PCB sensor sensor housing sensor. housing).

Defective freezer fan Fan motor lead wire Check fan motor lead wire Reconnect lead motor. is cut. with a tester. wire.

• Defective door switch Measure the voltage between • Replace door Refer to load

(freezer, refrigerator, PCB power blue line and fan switch

(freezer,

driving circuits in

home bar). motor after pressing test switch

refrigerator

and circuit

• Defective fan motor. of Main PCB. If the voltage is home bar). explanation.

• Defective fan motor normal, it is OK. • Replace fan motor.

driving relay. • Replace relay RY5

& RY6 or PCB.

Faulty defrost. Refer to faulty defrost items in trouble diagnosis Refer to trouble

functions. diagnosis

function.

TROUBLE DIAGNOSIS

-93-

Problems Symptom Causes Checks Measures Remarks

Bad cooling Wrong Defective Step Motor Check Step Motor Check if Step Motor damper Reconnect lead

Refrigerator Damper. damper motor and motor and reed switch lead wire. temperature. reed switch and lead wire are cut with a tester.

wire are cut. Check Refer to Step Motor damper Replace Step Motor Step Motor damper in parts repair guide. damperor refrigerator part.

control box Assembly. Check Step Motor Refer to Step Motor damper Replace relay or Refer to single damper Motor driving in parts repair guide. PCB. motor damper relay in PCB. driving circuits

in circuit explanation.

Foreign materials in Step

Check Step Motor damper Remove foreign Motor damper baffles. baffle visually. materials. Ice formation on Check if Step Motor damper Replace Step Motor Step Motor damper Heater wire is cut with a

damper or refrigerator

baffles. tester.

control Box Assembly.

Defective refrigerator Defective refrigerator Check the resistance of Replace refrigerator Refer to sensor sensor sensor parts. refrigerator sensor with a tester. sensor. resistance

characteristic table in circuit

explanation. Refrigerator sensor is Check the sensor color in the Repair main PCB substituted for other circuit. (main PCB sensor sensor housing. sensor. housing.) Defective refrigerator Check if refrigerator sensor Fix again the sensor assembly is not fixed at cover sensor but refrigerator sensor. condition. inner case visually.

TROUBLE DIAGNOSIS

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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 CON2 (1 and 7) Replace relay (RY 7 Refer to load

with a tester after pressing main and RY 3) or PCB. driving conditions PCB test switch twice. check in circuit If the voltage is normal then it is OK. explanation.

Defective defrost sensor parts. Check the resistance of defrost sensor Replace defrost Refer to sensor

with a tester. sensor. resistance

characteristic

table of circuit

explanation.

Defective Buzzer Defective connecting lead wire from Check lead wire related to door Repair lead wire. buzzer continuously main PCB to door switch. switch with a tester.

rings or door Defective door switch parts. Refer to door switch in parts repair Replace door switch. opening alarm guide. does not work.

Defective Buzzer does Key input wire is cut or bad connector Check input wire with a tester. Reconnect lead Refer to display display button not ring and terminal contact in main PCB and wire and replace or circuit in circuit

key does not display PCB connecting lead wire. directly connect bad explanation. sense even contact terminal to button is lead wire. pressed.

Key is continuously depressed due to Disassemble frame display and confirm Adjust or replace structural interference. visually. interfering

structures.

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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. Check model

continuously main PCB to door switch. switch. with dispenser. rings or door Defective freezer compartment door Refer to door switch in parts repair Replace Freezer opening alarm switch parts. guide. compartment door does not work. switch.

Bad water/ice Ice and water Defective connecting lead wire from Check Lead Wire associated with lever Repair lead wire. dispenser. are not Main PCB to lever switch. switch with a tester.

dispensed. Defective lever switch parts Refer to door switch in parts repair guide. Replace lever switch.

Defective photo coupler IC parts. Check voltage change at photo coupler Replace photo

output terminals with lever switch coupler IC or PCB. pressed. It is OK if voltage change is

between 0V - 5V. Defective relay associated with ice Check relay (RY4, RY5, RY12) Replace defective dispense (geared motor, cube and with a tester. relay. dispenser solenoid). Defective parts associated with ice Check resistance of parts with a tester. Replace defective dispense (geared motor, cube and parts. dispenser solenoid). Defective relay associated with water Check relay (RY7) with a tester Replace defective dispense. relay. Defective parts associated with water Check resistance of parts with a tester. Replace defective dispenser. parts.

3. Cooling Cycle Heavy Repair

3-1. The Heavy Repair Standards for Refrigerator with R134a Refrigerant

NOTE) Please contact Songso company on +82-53-554-2067 if you have inquiry on heavy repair special facility.

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NO. Items Unit Standards Purposes Remarks

1 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

10 minutes. Penetration. rainy seasons (the penetration of water

Drier:within into the pipe is dangerous).

20 minutes.

2 Welding. Nitrogen Weld under To protect - Refet to repair note in each part.

Pressure. Nitrogen oxide scale - R134a refrigerant is more susceptible to

atmosphere formation. leaks than R12 and requires more care (N

2 pressure: during welding.

0.1~0.2 kg/cm

) - Do not apply force to pipes before and

after welding to protect pipe from cracking.

2 sealed parts. Confirm N2 Confirm air leaking To protect - In case of evaporator parts, if it doesn't

leak. sounds when moisture make noise when removing bushing cap

removing bushing penetration. blow dry air or N

2 gas for more than

cap. 1 min use the parts. Sound:usable No sound:

not usable

Refrigeration

Evacuation

Min. More than To remove

Cycle. time 40 minutes. moisture.

Vacuum Torr Below 0.03(ref) Note:Only applicable to the model

degree equipped with reverse flow protect

plate.

Vacuum EA High and low Vaccum efficiency can be improved by

Pressure sides are operating compressor during evacuation. evacuated at the same time for models above 200

Vacuum EA Use R134a To protect The bushing pipes for R12 refrigerant shall

piping exclusive mixing of be melted when they are used for R134a

manifold. mineral and refrigerant causes of leak.

ester oils.

Pipe EA Use R134a To protect

coupler cxclusive. R12 Refri-

gerant mixing.

Outlet R134a exclusive.

(Socket)

Plug R134a exclusive

5 Refrigerant weighing. EA Use R134a Do not mix - Do not weigh the refrigerant at too hot or

exclusively. with R12 too cold an area.(25°C[77°F] is adequate.) Weighing refrigerant. - Use copper charging canister allowance:±5g Socket:2SV Plug: 2PV R134a Note:Winter:-5g Note:Do not burn O-ring (rubber) during

Summer:+5g welding.

6 Drier replacement. -

Use R134a exclusively

To remove

for R134a refrigerator

the moisture

Use R12 exclusively

from pipe.

for R12 refrigerator

Replace drier whenever repairing refrigerator cycle piping.

7 Leak check. -Do not use soapy Detect -Check oil leak at refrigerant leak area.

water for check. refrigerant Use electronic leak detector if oil leak is it may be sucked leak area. not found. into the pipe. -The electronic leak detector is very

sensitive to halogen gas in the air. It also can detect R141b in urethane. Please practice, the refore, many times before use.

3-2. Summary Of Heavy Repair

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- 97 -

Process Contents Tools

- Cut charging pipe ends and discharge refrigerant from Filter, side cutters drier and compressor.

- Use R134a oil and refrigerant for compressor and drier Pipe Cutter, Gas welder, N

2 gas

- Confirm N

2 sealing and packing conditions before use.

Use good one for welding and assembly.

- Weld under nitrogen gas atmosphere.(N

2 gas pressure:

0.1-0.2kg/cm

- Repair in a clean and dry place.

- Evacuate for more than forty minutes after connecting Vacuum pump R134a manifold gauge hose and vacuum pump to high (drier) exclusively, Manifold gauge. and low (compressor refrigerant discharging parts) pressure sides.

- Evacuation Speed:113liters/minute.

- Weigh and control the allowance of R134a charging R134a exclusive charging canister canister ina vacuum conditions to be ±5 g with (mass cylinder), refrigerant electronic scales and charge through compressor inlet R134a manifold gauge, (Charge while compressor operates). electronic scales, punching

- Weld carefully after pinching off the inlet pipe. off flier, gas welding machine

- Check leak at weld joints. Electronic Leak Detector,

Minute leak: Use electronic leak detector Driver(Ruler). Big leak: Check visually.

Note:Do not use soapy water for check.

- Check cooling capacity

➀ Check radiator manually to see if warm. ➁ Check hot line pipe manually to see if warm. ➂ Check frost formation on the whole surface of the

evaporator.

- Remove flux from the silver weld joints with soft brush Copper brush, Rag, Tool box

or wet rag. Flux may be the cause of corrosion and leaks.

- Clean R134a exclusive tools and store them in a clean tool box or in their place.

- Installation should be conducted in accordance with the

standard installation procedure. Leave space of more than 5 cm from the wall for compressor compartment cooling fan mounted model.

Trouble

diagnosis

Remove refrigerant

Residuals

Parts

replacement

and welding

Compressor

compartment

and tools

arrangement

Transportation

and

installation

Check

refrigerant leak

and cooling

capacity

Vacuum

Refrigerant

charging and

charging

inlet welding

3-3. Precautions During Heavy Repair

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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. (If the order is not observed, oil will leak.)

3. Replacement of drier. 1) Be sure to replace drier with R134a only when repairing pipes and injecting refrigerant.

4. Nitrogen blowing 1) Weld under nitrogen atmosphere in order to prevent oxidation inside a pipe. welding. (Nitrogen pressure : 0.1~0.2 kg/cm

5. Others. 1) Nitrogen or refrigerant R134a only should be used when cleaning inside of cycle pipes

inside and sealing.

2) Check leakage with an electronic leakage tester.

3) Be sure to use a pipe cutter when cutting pipes.

4) Be careful not the water let intrude into the inside of the cycle.

Compressor

Evaporator

Drier

Low pressure side

Condenser

High pressure side

3-4. Practical Work For Heavy Repair

TROUBLE DIAGNOSIS

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Items Precautions

1. Removal of residual

refrigerant.

1) Remove residual refrigerant more than 5 minutes later after turning off the refrigerator. ( If not, compressor oil may leak inside.)

2) Remove retained refrigerant slowly by cutting first high pressure side (drier part) with a nipper and then cut low pressure side.

2. Nitrogen blowing welding.

When replacing a drier:

Weld  and  parts by blowing nitrogen(0.1~0.2kg/cm

) to high pressure side after

assembling a drier.

When replacing a compressor:

Weld  and  parts by blowing nitrogen to the low pressure side. Note) For other parts, nitrogen blowing is not necessary because it does not produce oxidized

scales inside pipe because of its short welding time.

3. Replacement of drier.

Inserting a capillary tube

Measure distance with a ruler and put a mark(12

+3/-0

)on the capillary tube. Insert tube to the

mark and weld it

KEYPOINTING

Observe the sequence for removal of refrigerant. (If not, compressor oil may leak.)

KEYPOINTING

Welding without nitrogen blowing produces oxidized scales inside a pipe, which affect on performance and reliability of a product.

KEYPOINTING

Be sure to check the inserted length of capillary tube when it is inserted. (If too much inserted a capillary tube is blocked by a filter.)

Compressor

Low pressure side

Condenser

High pressure side

Drier

Evaporator

Release

Refrigent

Intake

Suction

1 2 1

Evaporator

Drier

High pressure side

Condenser

Refrigent

Intake

-0

Filter

* Unit : mm

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Items Precautions

4.Vacuum degassing.

Pipe Connection

Connect a red hose to the high pressure side and a blue hose to the low pressure side.

Vacuum Sequence

Open valves  and  and evacuate for 40 minutes. Close valve .

5.Refrigerant charging.

Charging sequence

1) Check the amount of refrigerant supplied to each model after completing vacuum degassing.

2) Evacuate charging canister with a vacuum pump.

3) Measure the amount of refrigerant charged.

- Measure the weight of an evacuated charging canister with an electronic scale.

- Charge refrigerant into a charging canistere and measure the weight. Calculate the

weight of refrigerant charged into the charging canister by subtracting the weight of an evacuated charging canister.

KEYPOINTING

- If power is applied during vacuum degassing, vacuum degassing shall be more effective.

- Operate compressor while charging refrigerant. (It is easier and more certain to do like this.)

KEYPOINTING

- Be sure to charge the refrigerant at around 25°C [77°F].

- Be sure to keep -5g in the winer and +5g in summer

the amount of refrigerant charged= a weight after charging a weight before charging (weight of an evacuated cylinder)

Calculation of amount of refrigerant charged

Blue

Evaporator

Drier

2 1

Low

pressure

Yellow

Compressor

Suction pipe

Condenser

Vaccum

Pump

High

pressure

Red

R134a

Indicate the weight of an evacuated charging canister

LG LRSPC2051xx Service Manual

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