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ELECTRONICS
272, Oseon-Dong, Kwangsan-Gu, Kwangju-City, Korea, 506-253 TEL : 82-62-950-6810, 6811 FAX : 82-62-950-6829
© Samsung Electronics Co., Ltd. Refrigerator Division 2000. 03 Printed in Korea Code-No : DA68-00541A
Model : SR-S2026C(D) SR-S2226C(D)
SR-S2027C(D) SR-S2227C(D) SR-S2028C(D) SR-S2228C(D) SR-S2029C(D) SR-S2229C(D)
SR-S20NTC(D) SR-S22NTC(D) SR-S20BTC(D) SR-S22BTC(D) SR-S20DTC(D) SR-S22DTC(D) SR-S20FTC(D) SR-S22FTC(D)
REFRIGERATOR
1. Product Specification
Contents
2 3 5 7 9 15 17 26 34 50 55 60 63 64 89 90 91 92 93 94
2. Safety Warning & Caution 3. Specification of Electric Components 4. Circuit Diagram 5. Dimension & Part Name of Refrigerator 6. Freezing Cycle & Cold Air Circulation Course in Refrigerator 7. Function & Operating Instruction of Refrigerator 8. Operating Principle of Circuit 9. Trouble Checkup & Repair Method 10. Operation Principle & Repair Method of ICE-MAKER 11. Reference 12. Disassembly Method of Freezer & Refrigerator 13. Method of Hinge up Assembly & Disassembly 14. Refrigerator Exploded view & List 15. Machine Room Assembly Specification 16. Disassembly & Assembly Method of Internal Part of Electric Field Box 17. Installation Method of Water Supply Tube 18. Installation of the Water Dispenser Line 19. PCB Circuit Diagram and Service Components List 20. Specification of Principal Part of Circuit
1. Product Specifications
Item
Specification
Model Total Net Capacity Refrigerator Freezer Net dimension(W H D)
Rated Frequency and Frequency Motor Rated Consumption Power Electric Heater Rated Consumption Power Kind of Refrigerator Refrigerant Refrigerant Input Amount Freezer Performance Product Weight
SR-S2026C(D) SR-S2027C(D) SR-S2028C(D) SR-S2029C(D) SR-S20NTC(D) SR-S20BTC(D) SR-S20DTC(D) SR-S20FTC(D) Basic & H/B Dispenser Basic Dispenser & H/B 562 349 213 540 349 191
908mm 719(724)mm 1760mm 230 240V/50Hz 155W 350W 360W 355W 160W 365W
Indirect Cooling Method Refrigerator
HFC-134a 190gr (4-STAR) 111Kg 111Kg 117Kg 117Kg
Item
Specification
Model Name
SR-S2226C(D) SR-S2227C(D) SR-S2228C(D) SR-S2229C(D) SR-S22NTC(D) SR-S22BTC(D) SR-S22DTC(D) SR-S22FTC(D) Dispenser Dispenser & H/B Basic Basic & H/B 599 227 372 569 197 372
Total Inside Capacity Net Inside Capacity Freezer Refrigerator Outer Size (width depth height) Rated Frequency and Frequency Motor Rated Consumption Power Electric Heater Rated Consumption Power Kind of Refrigerator Refrigerant Refrigerant Input Amount Freezer Performance Product Weight
908mm 754(759)mm 1760mm 230 240V/50Hz 155W 350W 360W 355W 160W 365W
Indirect Cooling Method Refrigerator
HFC-134a 190gr (4-STAR) 121Kg 121Kg 127Kg 127Kg 2
2. SAFETY WARNINGS
Read all instructions before using this product and keep to the instructions in order to prevent danger or property damage.
CAUTION/WARNING SYMBOLS DISPLAYED SYMBOLS
Warning
Indicates that a danger of death or serious injury exists. Indicates that a risk of personal injury or material damage exists. means "Prohibition". means "Do not disassemble". means "No contact". means "The things to be followed". means "Power cord should be unplugged from the consent" means "Earth to prevent Electric shock".
Caution
Warning
Do not insert the power plugs Do not disassemble, for many products at the repair or alter. same time.
May cause abnormal generation of heat or fire. It may cause fire or abnormal operation which leads to injury.
Do not bend the power cord with excessive force or do not have the power cord pressed by heavy article.
May cause fire.
Prohibition
Do not disassemble
Do not install the refrigerator in the wet place or the place which water splashes.
Deterioration of insulation of electric parts may cause electric shock or fire.
Make sure of the earth.
If earthing is not done, it will cause breakdown and electric shock.
Pull the power plug out to exchange the interior lamp of the refrigerator.
It may cause electric shock.
Earth
Unplug
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Caution
Do not put bottles or kinds of glass in the freezer.
Freezing of the contents may inflict a wound.
Do not store narrow and lengthy bottles or foods in a small multi-purpose room.
It may hurt you when refrigerator door is opened and closed resulting in falling stuff down.
Do not store pharmaceutical products, scientific materials, etc., in the refrigerator.
The products which temperature control should not be stored in the refrigerator.
Prohibition
Prohibition
Prohibition
Do not store articles on the product.
Opening or closing the door may cause things to fall down, with may inflict a wound.
Use the rated components on the replacement.
Check the correct model, rated voltage, rated current, operating temperature and so on.
On repair, make sure that the wires such as harness are bundled tightly.
Bundle tightly wires in order not to be detached by the external force and then not to be wetted.
Prohibition
comRated pone nts
On repair, remove completely dust or other things of housing parts, harness parts, and check parts.
Cleaning may prevent the possible fire by tracking or short.
After repair, check the assembled state of components.
It must be in the same assembled state when compared with the state before disassembly.
Check if there is any trace indicating the permeation of water.
If there is that kind of trace, change the related components or do the necessary treatment such as taping using the insulating tape.
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3. Specifications of Electric Components
Items Models Freezing Capacity Model Compressor Components for Freezer Starting type Oil Charge Evaporator Condenser Dryer Capillary tube Refrigerant Room Temperature Sensor Components Model Freezer THERMISTOR (F-SENSOR) 502AT Model THERMISTOR (R-SENSOR) 502AT Temperature Selection
-26°C -20°C -14°C ON(°C) -25.0 -19.0 -13.0 ON(°C) 0.0 4.0 8.0
Specification
SR-S20..~SR-S22.. (4 STAR) DK182Q-L2U R.S.C.R FREOL - 15 (ESTER)
Freezer Refrigerator
SPLIT FIN TYPE SPLIT FIN TYPE Forced and natural convection type Molecular sieve XH-9 0.82 3000, 5.5 Kg/cm2 HFC-134a OFF(°C) -27.0 -21.0 -15.0 OFF(°C) -2.0 2.0 6.0 4 hr 10 min
Refrigerator
Temperature Selection
-1°C 3°C 7°C
Defrost Cycle
First Defrost Cycle (Concurrent defrost of F and R) Defrost Cycle(FRE) Defrost Cycle(REF) Pause time F DefrostSensor R DefrostSensor Model SPEC Model SPEC Rated Operating temperature
12 ~ 38 hr (vary according to the conditions used) 6 ~ 19 hr (vary according to the conditions used) 10 2 min
Defrost Related Components
Defrost Sensor
THERMISTOR (502AT) 5.0 at 25°C
THERMISTOR (502AT) 5.0 at 25°C
Thermal-Fuse
AC 250V 10A 72 4°C
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Items Model Defrost-Heater(FRE) Defrost-Heater(REF) DRAIN Heater(FRE) DRAIN Heater(REF) DISPENSER Heater HOME-BAR Heater Conducting at F Defrosting Conducting at R Defrosting Conducting at F Defrosting Conducting at R Defrosting Interlock with F-FAN Interlock with COMP
-
Specifications
SR-S2026, S2226 SR-S2027, S2227 SR-S2028, S2228 SR-S2029, S2229 SR-S20NTC,S22NTC SR-S20BTC,S22BTC SR-S20DTC,S22DTC SR-S20FTC,S22FTC 200 W 100 W 25 W 25 W 10W 5W 200 W 100 W 25 W 25 W 5W 10W
Thermal-Fuse for preventing overheating of Freezer Defrost-Heater Thermal-Fuse for preventing overheating of Refrigerator Defrost-Heater
AC 250V 10A 72
4°C
Compressor Condenser for COMP (Package type) Starting-Relay Running Starting Model Operation Model Over-load Relay Temp. ON Temp. OFF Rated Voltage MOTOR-BLDC(FRE) MOTOR-BLDC(REF) MOTOR-BLDC (Circuit) Lamp(FRE) Lamp(REF) Door Switch Door Switch (HOME-BAR) Dispenser Switch Power cord Earth Screw
DK182Q-L2U 350VAC-5 F J531Q35E330M385-2 33 20%
Electric Components
4TM265RFBYY-53 130 69 5°C 9°C
230V/50,60Hz 240V/50Hz UDQMOO2H4ASS 240V/50Hz UDQMOO2H4ASS 240V/50Hz UDQMOO2H4ASS AC240V/30W AC240V/30W 2 AC250V 0.5A 2 AC250V 0.5A DECO 250VAC 6A AC250V 12A BSBN (BRASS SCREW)
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4. Circuit Diagram
For Basic & With Home Bar Models (SR-S2026, S2027, S2226, S2227/S20NTC,S20BTC,S22NTC,S22BTC)
Reference
RED-RED BLU-BLUE ORG-ORANGE P/BLU-PINK/BLUE BRN-BROWN PNK-PINK GRY-GRAY W/BLU-WHITE/BLUE WHT-WHITE YEL-YELLOW BLK-BLACK PRP-PURPLE W/BLK-WHITE/BLACK S/BLU-SKY/BLUE E-EARTH W/RED-WHITE/RED
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For Dispenser & With Home Bar Models (SR-S2028, S2029 S2228, S2229/S20DTC, S20FTC,S22DTC,S22FTC)
Reference
RED-RED BLU-BLUE ORG-ORANGE P/BLU-PINK/BLUE BRN-BROWN PNK-PINK GRY-GRAY W/BLU-WHITE/BLUE WHT-WHITE YEL-YELLOW BLK-BLACK PRP-PURPLE W/BLK-WHITE/BLACK S/BLU-SKY/BLUE E-EARTH W/RED-WHITE/RED
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5. Dimension & part name of refrigerator
5-1) Product Dimension (SR-S2026, S2027, S2226, S2227/S20NTC,S20BTC,S22NTC,S22BTC)
(SR-S2027, S2227) -S20BTC,S22BTC
MODEL
SR-S2026C, S2027C/S20NTC,S20BTC(D) SR-S2026D, S2027D/S20NTC(D),S20BTC(D) SR-S2226C, S2227C/S22NTC,S22BTC(D) SR-S2226D, S2227D/S22NTC(D),S22BTC(D)
"A"
719 714 754 749
"B"
50 50 85 85
"C"
55 50 55 50
"D"
54 54 89 89
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5-2) Product Dimension (SR-S2028, S2029, S2228, S2229/S20DTC,S20FTC,S22DTC,S22FTC)
(SR-S2029, S2229) -S20FTC,S22FTC
MODEL
SR-S2028C, S2029C/S20DTC,S20FTC(D) SR-S2028D, S2029D/S20DTC(D),S20FTC(D) SR-S2228C, S2229C/S22DTC,S22FTC(D) SR-S2228D, S2229D/S22DTC(D),S22FTC(D)
"A"
719 714 754 749
"B"
50 50 85 85
"C"
55 50 55 50
"D"
54 54 89 89
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5-3) Part Name (SR-S2026, S2226/S20NTC,S22NTC)
FREEZER
LAMP-INCANDESCENT SHELF GUARD TRAY-ICE ICE CASE-BASKET COVER-LEG, FRONT
REFRIGERATOR
COVER-GUARD LAMP-INCANDESCENT SHELF TRAY-CHILLED ROOM TRAY-EGG GUARD CASE-VEGETABLE
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5-4) Part Name (SR-S2027, S2227/S20BTC,S22BTC)
FREEZER
LAMP-INCANDESCENT SHELF GUARD TRAY-ICE ICE CASE-BASKET COVER-LEG, FRONT
REFRIGERATOR
COVER-GUARD LAMP-INCANDESCENT SHELF TRAY-CHILLED ROOM TRAY-EGG GUARD CASE-VEGETABLE HOME-BAR
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5-5) Part Name (SR-S2028, S2228/S20DTC,S22DTC)
FREEZER
ICE-MAKER ICE-CHUTE LAMP-INCANDESCENT SHELF GUARD CASE-BASKET COVER-LEG, FRONT
REFRIGERATOR
COVER-GUARD SHELF-WINE LAMP-INCANDESCENT TRAY-CHILLED ROOM SHELF TRAY-EGG GUARD CASE-VEGETABLE
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5-6) Part Name (SR-S2029, S2229/S20FTC,S22FTC)
FREEZER
ICE-MAKER ICE-CHUTE LAMP-INCANDESCENT SHELF GUARD CASE-BASKET COVER-LEG, FRONT
REFRIGERATOR
COVER-GUARD SHELF-WINE LAMP-INCANDESCENT TRAY-CHILLED ROOM SHELF TRAY-EGG GUARD CASE-VEGETABLE HOME-BAR
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6. Freezing Cycle & Cold Air Circulation Course in Refrigerator
6-1) Freezing Cycle COMPRESSOR ACCUMULATOR WIRE-COND SIDE CLUSTER PIPE COMPRESSOR HOT PIPE DRYER
CAPILLARY TUBE
REFRIGERATOR EVAPORATOR SUCTION PIPE
FREEZER EVAPORATOR
REFRIGERATOR EVAPORATOR SIDE CLUSTER PIPE
ACCUMULATOR
SUCTION PIPE HOT-PIPE FREEZER EVAPORATOR COMPRESSOR WIRE-CONDENSER CAPILLARY TUBE
DRYER
HOT-PIPE
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6-2) Cold Air Circulation Course in Refrigerator (Cold Air Passage Circulation Course)
FREEZER
REFRIGERATO
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7. Function & Operating Instruction of Refrigerator
7-2) Temperature Control Function
1) Basic and with Home Bar Models
2) Dispenser and with Home Bar Models
7-2) Temperature Control Function
Temperature selecting function of freezer 1) At initial Power On, -20°C is selected automatically. 2) Select one button for 13 levels of -14°C -26°C. 3) 1°C drops per each pressing of temperature selection button of freezer.
Division Display Change At Initial Power On One Time Press 6 Times Press 7 TimesPress 12 TimesPress
-20°C
-21°C
-26°C
-14°C
-19°C
Temperature selecting function of Refrigerator 1) At initial Power On, 3°C is selected automatically. 2) Select one button for 9 levels of 7°C -1°C. 3) 1°C drops per each pressing of temperature selection button of Refrigerator.
Division Display Change At Initial Power On One Time Press 4 Times Press 5 TimesPress 8 TimesPress
3°C
2°C
-1°C
7°C
4°C
Reference (terms explanation) 1)F Room: freezer 2) R Room: Refrigerator 3) F-FAN: fan motor in freezer 4) R-FAN: fan motor in Refrigerator 5) COMP: compressor
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Reference Temperature of table on previous page is temperature of center part of 1/3 height of Refrigerator/Freezer compartments. It is temperature data at unload state. When actually used, temperature may differ according to surrounding condition and use frequency. The table displays general characteristic of temperature.
7-3) Function of Quick Freeze & Vacation
Select extra Quick Freeze & Vacation button. Whenever Quick Freeze & Vacation button is pressed, selection/ cancellation (corresponding lamp On/Off) is repeated. When Quick Freeze & Vacation is selected, temperature setup of freezer and Refrigerator does not change. At state of selecting Quick Freeze & Vacation, change of temperature setup of freezer and Refrigerator is possible. Quick Freeze Function 1) When Quick Freeze function is selected, COMP and F-FAN operates continuously for 2 and half hours. 2) While Quick Freeze function is working, Refrigerator operates under present setup condition. 3) When Quick Freeze function is completed (after continuous operation of COMP, F-FAN for 2 and half hours), Quick Freeze lamp lights out automatically and operates according to setup temperature of freezer. Vacation Function 1) When Vacation is selected, Refrigerator fan is turned off. 2) Though Vacation function is selected, Refrigerator fan does not turned off but turned on for initial 5 minutes. 3) When Vacation function is selected and Ice Timer is set, Vacation function completes automatically when Ice Maker works by Ice Timer function. Then Refrigerator fan operates according to temperature setup of Refrigerator. (explained in detail at Ice Timer function) 4) Vacation function is selected/ canceled by Vacation button. It can be canceled by temperature control button of Refrigerator while Vacation function is selected. 5) While Vacation function is working, Vacation lamp is ON, and temperature display of Refrigerator is OFF. Reference If Quick Freeze function is selected when freezer temperature is over -10°C and Refrigerator temperature is over +10°C like the condition of initial Power ON, Refrigerator Fan becomes OFF until freezer temperature drops under certain temperature. When freezer temperature becomes under certain temperature, Refrigerator Fan operates.
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7-4) Alarm Function
Button Touch Sound ("Ding-Dong" Sound) 1) Input confirmation sound of "Ding-Dong" sounds when each button of Control Panel is pressed. 2) "Ding-Dong" doesn't sound if more than two keys are pressed at the same time or buttons are wrongly operated. Door-Open Alarm Sound ("Ding-Dong" Sound) 1) If door of freezer or Refrigerator remains open over 2 minutes, alarm sounds ten times. 2) If door remains open continually afterward, alarm repeats ten times per one minute cycle. 3) Alarm stops immediately when door of freezer or Refrigerator is closed. Forced Operation & Forced Defrost Alarm Sound ("Beep" Sound) 1) If forced operation or forced defrost is selected, "Beep" sound occurs. 2) If forced operation is selected, alarm sound occurs until automatic cancellation (after 24 hour's forced operation) or cancellation function is selected. 3) Also in case of forced defrost, alarm sound occurs until defrost is completed (including pause) or cancellation function is selected.
7-5) Defrost Function
At time of initial Power On, defrost function works for both freezer and Refrigerator at the same time, when integrating time of Comp On is over 4 hours. Afterward defrost cycle is changeable according to use condition or surrounding environment from 6 hrs. to 38 hrs.. After completing the initial defrost, PRE-COOL function works for 20 min. to minimize temperature increase by defrost work. However, PRE-COOL function is determined according to temperature in Refrigerator at the point of defrost time. If F-room temperature is over -21°C, PRE-COOL function works for F-room. If F room temperature is below -21°C, PRE-COOL function does not work.
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7-6) Test Function
Test function is for test, process inspection and SVC of PCB and product. After selecting test S/W and confirming function of product, turn on power switch again to operate self-inspection function. If you press Quick Freezer Key on Display Panel and temperature control Key in R-room for more than 8 seconds, all Displays will be turned off and continue operating in Test Mode. At this moment, if any key is pressed among freezer temperature control key, Refrigerator temperature control key, quick freeze key or vacation key, it operates as the test button. F-room : Freezer, R room : Refrigerator Forced Operating Function 1) In the state where display panel was converted into test mode, if test button is selected once, COMP will operate immediately without 5 minute delay function. Therefore, forced operation is conducted at the very moment of COMP OFF, over load may be caused. Please be careful. 2) If forced operation is selected, freezer and Refrigerator is set to automatic, and the temperature of freezer is set to "-26°C" and Refrigerator is set to "1°C", Comp and F-fan operates continuously, and R-fan in Refrigerator is controlled by "1°C" setup. 3) Forced operation is valid for 24hrs. That is, if 24hours. pass after selecting forced operation, simultaneous defrost in both Refrigerator and freezer is automatically carried out. And normal operation is carried out by present setup of Refrigerator and freezer. 4) Cancellation of forced operation in the middle of working is possible by turning on Power after turning it off (resetting), or by selecting test cancel mode shown in the item 3 below. 5) When forced operation works, alarm sound will continue until forced operation is completed. There is no alarm cancel function. Forced Defrost Function 1) In the state of forced operation, if display panel is converted into test mode and press the test button once more, forced operation is cancelled immediately, and evaporator defrost function of Refrigerator operates. 2) At this time, beep alarm sounds for 3sec. at the point of defrost, and 0.75sec. ON/0.25sec. off sound occurs during forced defrost function of Refrigerator works. 3) If above defrost function of Refrigerator is maintained, it operates normally after defrost is completed. 4) While forced defrost function of Refrigerator operates, pressing the test button once more enables simultaneous defrost for both freezer and Refrigerator. 5) At this time, beep alarm also sounds for 3sec. at the point of defrost, and 0.75sec. ON/ 0.25sec. off sound occurs continually until simultaneous defrost of F and R is completed. Test Cancel Mode 1) In the state of simultaneous defrost of freezer and Refrigerator, if display panel is converted into test mode, and test button is pressed once more, defrost of both freezer and Refrigeration is cancelled immediately and resumes normal operation . Reference It works step by step in test function. It does not change from 1 step (forced operation) to 4 step (test cancel mode) directly. It operates corresponding function only after it goes through the previous step. While test function works, it is most desirable to turn off main power and then turn it on.
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7-7) Self-diagnosis Function
Self-diagnosis Function at the time of initial power is on. 1) When the initial power is applied to Refrigerator, all lamps light and conduct self-diagnosis function internally. 2) If result shows no fault, display will go into the initial normal lighting state. 3) If result shows any fault, corresponding led is turned on and off and alarm sounds. 4) Error sign of self-diagnosis continues until all defects of parts are repaired or self-checkup function is cancelled. 5) If all corresponding parts are repaired completely, display will go into the normal mode state. 6) After repairing Refrigerator, turn on switch again after turning it off to make it sure if Refrigerator is properly repaired. 7) Therefore, in case open & short related problem of sensor needs to be confirmed during A/S, turn off the power of Refrigerator and turned it on again to operate self-Diagnosis function. Then sensor function can be checked. 8) When any defect occurs, corresponding display signs are shown as in the following chart.
NO Items ICE-MAKER SENSOR Refrigerator R-sensor Refrigerator Corresponding LED Defect Content Remark
01 02
Defect of wire connecting system due to When temperature sensing of Rbadness of Open/Short related aspect of sensor is more than +50°C and less Sensor which is equipped at the than -50°C. beneath of ice-making bowl Missing sensor housing of R-room, contact defects, disconnection of wires, defect of short-circuit sensor itself, etc. Defect is indicated when temperature sensing of R-sensor is more than +50°C and less than -50°C.
03 defrost sensor 04 05 06 07
R-fan motor Error ICE-MAKER KIT Outside Air Sensor Freezer F-sensor Freezer
Missing sensor housing of R-room, Defect is indicated when temperature contact defects, disconnection of wires, sensing of R-sensor is more than +50°C defect of short-circuit sensor itself, etc. and less than -50°C. Interference of Fan due to frost, etc., un-insertion of connector, disconnection, etc. Defect of micro S/W in Gear box, motor, gear and other defect in wire system Missing of outside air sensor housing inside of PCB base of top part of Refrigerator, contact defect, disconnection of wires, defect of short-circuit sensor itself, etc. Occurrence of the case where Fan Motor of inner refrigerator room becomes to operate under about 600rpm at the normal operation condition or stops driving. When normal operation is not done until iceisolating motion is attempted 3 times (only ice-making function model corresponds). Badness is indicated when temperature sensing of Outside Air Sensor is more than +50°C and less than -50°C.
Missing sensor housing in F-room, Defect is indicated when temperature contact defects, disconnection of wires, sensing of F-sensor is more than +50°C defect of short-circuit sensor itself, etc. and less than -50°C. Missing defrost-sensor housing in evaporator of Defect is indicated when temperature F- room, contact defects, disconnection of wires, sensing of F-sensor is more than +50°C defect of short-circuit sensor itself, etc and less than -50°C. Interference of Fan due to frost, etc., un-insertion of connector, disconnection, etc. Un-insertion of connector, disconnection, etc. Occurrence of the case where Fan Motor of inner freezer room becomes to operate under about 600rpm at the normal operation condition or stops driving. Occurrence of the case where Comp Cooling Fan Motor becomes to operate under about 600rpm at the normal operation condition or stops driving.
08 defrost-sensor 09 10
F-fan motor Error C-fan motor Error
Note) This self-Diagnosis works only when the open/short related aspect of sensor is bad. Minute feature change of sensor is not judged as defect if it does not get rid of the extent of temperature sensor described in Remark so that it is indicated as normal.
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Self-Diagnosis Function in Normal Operation 1) Under normal operation of Refrigerator, if you press "Quick freeze" and "Vacation" button at the same time for 6sec., temperature setup display will proceed On/Off blink of all for 2sec. at 0.5sec. interval. If you press "Quick freeze" and "Vacation" button continuously at the same time for about 8sec. including 2sec. of repetition of LED's On/Off, self-Diagnosis function is selected. 2) At this moment, it goes into self-Diagnosis function with "Ding-dong" buzzer sound. 3) When Error occurs, it is restored to normal state regardless of defect repairing after signal lasts for 30sec. ("Ding-dong" buzzer sound). 4) While it is operating self-Diagnosis function, it does not accept input of button.
7-8) Load Condition Indicating Function
In normal operation, if you press "Quick freeze" and "Vacation" button at the same time for 6 sec., all setup display of freezer and Refrigerator are turned on. If you hand off from the button at this moment, temperature setup display of freezer and Refrigerator will proceed On/Off blink of all for 2sec. at 0.5sec. interval. While On/Off blink is processing, if you press the temperature setup button, it goes into load condition indicating function (with ding-dong buzzer sound). Load condition indicating mode shows from which load Micom signal outputs at present. However, it only shows that micom signal is outputted and does not confirm whether load is actually operating or not. That is, even if load is displayed as it is operating, load may not operate because of actual defect of load or defect of relay on PCB. During A/S, you can use this function by applying the main function. Time required to indicate is 30 sec.. After 30sec., it is automatically restored to the setup state before its function. Corresponding display indication about load condition is shown as in the following table.
Load Mode Check List
NO Display Content R-fan high R-fan low R-Def-Heater Start Mode Overload Mode Low-temperature Mode Comp F-fan high F-fan low F-Def-Heater C-fan high C-fan low Operation Content R-fan high speed operation indication R-fan low speed operation indication R room defrost-heater operation indication indication operation stage (Not important) when ambient temperature is more than 34°C when ambient temperature is less than 17 °C Comp operation indication F-fan high-speed operation indication F-fan low-speed operation indication F room defrost-heater operation indication C-fan high-speed rotation operation indication C-fan low-speed rotation operation indication Press both buttons 6 sec, simultaneously, all LED lights are turned on and off twice. At this time press button .
For load under operation, corresponding LED lights on.
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7-9) Function of Ice/Water Dispenser when they are equipped.
This function only applies to a model equipped with ice-maker. This function is limited to a model from which ice and water can be taken out from outside without opening door. Cube Ice / Crushed Ice/ Stop (Off) Function 1) At the time of intial power on, when inside temperature of freezer is more than 5°C, Cube Ice LED light on display is lit on, and Crushed Ice LED light keeps light-off state. But when power is turned on, if inside temperature of freezer is less than 5°C, Micom recalls form of ice which was set up before power off so that it displays the memorized ice form. 2) "Cube" "Crushed" "Ice Off" is selected in turn by ice selecting Key. 3) In case of selecting "Crushed" mode, it operates Gear Motor to eject crushed ice to outside when ice lever operates as ice is made in the bowl of ice machine. 4) In case of selecting "Cube" mode, Gear Motor and ice solenoid operate to eject cube ice to the outside when ice lever operates as ice is made in the vessel of ice machine. 5) If "Ice Off" is selected, it stops only ice-making function of ice-maker so that ice is not made. At the moment of selecting "Ice Off", ice-making function stops. But, if it is in the process of ice-isolating, returning to horizontal state and supplying water, it maintains stoppage state after water supply is completed. Even when "Ice-Off" function is operating, ice eject lever operates normally. This is not a defect. Therefore, remained ice in the ice container can be used normally. Ice Timer Function 1) If you press ice timer button, it is automatically set to Ice-Off mode regardless of present setup condition of ice mode (Cube / Crushed / Ice Off), and ice lamp is turned on. And time is set to 3 days on temperature control display of freezer at first. And each time you press the ice button, the number increases one by one. And if it reaches 30 days, it resumes from 3 days. 2) Among ice timer functions, if you press ice selecting key, ice timer function is cancelled. 3) If reservation is made by ice timer button, setup temperature of freezer returns to temperature display of freezer after 5sec.. At this moment, if ice timer button is pressed again, it displays the previous reserved date again.1-2 days before the reserved date is completed, ice maker starts operating. And when the reserved date is completed, more than half of ice bucket is filled. 4) If ice timer is reserved and vacation function operates, vacation function ends at the same time when ice timer function ends.
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5) The following are examples for use. In case of selecting vacation function only If you press "vacation" button, Refrigerator will not operate and freezer will operate only. In case you select this function, take out all foods in the Refrigerator. And "Ice Off " is automatically selected among ice modes, so ice bucket should be empty and water supply valve should be turned off. In case of selecting ice timer function only In case you press "Ice Timer" button to select date as explained above, and not selecting "Vacation" function so that Refrigerator continues to operate, ice mode is selected as "Ice Off" and ice is stored in the bucket when you return. Therefore, do not lock the water supply valve. In case of selecting both vacation and ice timer function In case you press "Ice Timer" button and "Ice Timer" button to select date to select date as explained above, or if you press "Ice Timer" button to select date and press "Vacation" button afterward, Refrigerator does not operate but freezer operates only, and ice mode is automatically selected as "Ice Off". So you must take out all foods in Refrigerator, empty ice in the ice bucket, check water leakage on valves, other hoses and connection parts without locking water supply valve. When "Vacation" function is cancelled, Refrigerator resumes its operation. Ice Dispenser Function (Cover Ice Route Solenoid Valve) 1) After 8sec. from initial power on, solenoid of ice exit operates once. This is the function to prevent interruption of electric service when ice exit is open. So this is not a defect. 2) With turning the dispenser S/W from on to off and ice ejecting is completed, 5sec. after turning off S/W, ice exit is closed because cover ice route solenoid of ice dispenser operates. Water Dispenser Function 1) This function is a system of direct connection with water supply. When water lever is pressed, water solenoid valve which is equipped at the right side of machine room opens so as to operate to eject water. However, it has no function to control on Micom PCB. Therefore, if there happens any defect at water eject function, check and repair solenoid itself, wire connecting connector, connecting tube and state of water supply. Water Filter Indicator Function 1) After the initial power on, indication lamp is displayed in green light. After 5 months passed, it is displayed in orange light, and 1 month after this, it is displayed in red light. This is memorized by EEPROM in Micom PCB, so it counts the passed time continually though the power is turned on again after it was turned off. 2) If you press ice selecting button and ice-making stop button at the same time for 25sec. continuously, indication lamp lights in green color. And it becomes orange after 5 months from this moment. And it displays red after 1 month from the moment. 3) If you press ice selecting button and ice-making stop button at the same time for 5 sec., indication lamp is turned off and water filter indicator function stops. At this moment, passed time is not counted. 4) At the state where the function is stopped, if you press ice selecting button and icemaking stop button at the same time for 25sec. continuously, "Green"light is turned on and water filter indicator function will resume. And it becomes orange light after 5 months from this moment. And it displays red light after 1 month from the moment.
24
7-10) Restoring Function of Operation State in case of Power Stoppage
1) In case power is applied to prevent customer from nonsense call about initialization of freezer and Refrigerator at -20°C and 3°C respectively when a momentary power stoppage (not a long-term power stoppage) occurs while Refrigerator is operating, it operates in two ways. The first one is initialization by judging the temperature of inside of freezer, and the second one is restoration of operation state. 2) At the initial power on, in case temperature of the inside of freezer is judged as about less than +5°C, it is regarded as momentary power stoppage during operation. Therefore, functions related with panel display such as Quick Freeze, Vacation, Freezer setup, Refrigerator setup, Ice timer, Form of ice, etc. are restored. 3) At the initial power on, in case temperature of the inside of freezer is about more than +5°C, it is regarded as long-term power stoppage. In this case, panel display is initialized (Quick off, Vacation off, Freezer is set to -20°C, Refrigerator is set to 3°C, Ice timer off, Cube selecting). 4) Ice timer function and water filter indication function are not initialized in case of power stoppage. But during power stoppage, time count does not progress because Micom in PCB does not operate because power source is not supplied.
25
8. Operation Principle of Circuit
8-1) Power Source Part
When power is supplied, electric wave is rectified through BD1 to generate voltage of about DC 300V.Top S/W is automatically switched to the optimum condition according to load condition of the second part. When electricity flows between D and S of the top S/W, electricity is generated inside the trans, and when the power between D and S is turned off, electricity which is deserted at trans is transmitted to the second part. This process is repeated to maintain the fixed voltage of 12V by C102 of the second part. This power supplies electricity to power source of 5V, relay and display, and it allows operation of main PCB possible.
8-2) Oscillation Circuit Part
Terminal
Oscillation Frequency
Xin(#30) Xout(#31)
4MHz 4MHz
It is oscillation circuit for synchronism clock generation and time calculation on information sending/receiving of internal elements. It does not carry out its normal function because timing system of MICOM alters in case the specification of resonator changes.
8-3) Reset Circuit Part
Terminal
Voltage
Vcc RESET
DC 5V DC 5V
Reset circuit is a circuit which allows the whole program operate on an initial position by initializing several parts such as RAM inside of MICOM when power is applied to MICOM. When power is supplied, the reset terminal voltage becomes several tens "LOW" state compared with Vcc voltage (DC 5V) of MICOM, and it maintains "HIGH"(Vcc voltage) state in normal operation condition.
26
8-4) Door S/W Sensing Circuit
Terminal F-Room
Voltage
MICOM 5V (HIGH) 0V (LOW) 0V (LOW) 5V (HIGH)
DOOR CLOSE DOOR OPEN DOOR CLOSE
R-Room
DOOR OPEN
For door open sensing of F room, of CN30 is connected to the ground. For , Vcc(DC 5V) is supplied through resistance R404(4.7 ), and "LOW" (0V)/ " HIGH(5V) is applied to MICOM by open/close of the F room door so that it can sense open/close of the F room door. For door open sensing of R room, of CN30 is connected to the ground. For , Vcc(DC 5V) is supplied through resistance R403(4.7 ), and "LOW" (0V)/" HIGH(5V) is applied to MICOM by open/close of the R room door so that it can sense open/close of the R room door. At this time, if there is any defect at the door S/W, the corresponding fan inside the Refrigerator does not work or alarming function works. Therefore, the door S/W must be checked in case of A/S. That is, if door opens, the corresponding fan inside the Refrigerator stops without fail. When connection point of S/W has defect, MICOM judges that door is open so that it stops the fan though the door is closed.
8-5) Temperature Sensing Circuit Part
MICOM terminal
Voltage MICOM terminal voltage changes in accordance with temperature.
PIN #56 (F-SENSOR) PIN #57 (F-DEF-SENSOR) PIN #58 (R-SENSOR) PIN #59 (R-DEF-SENSOR) PIN #60 (EXT-SENSOR)
Sensor uses thermistor which has temperature coefficient of negative resistance. When temperature rises, resistance value gets smaller, and when temperature falls, resistance value gets larger. R306~R310, C301~C305 are parts for noise prevention, which are not related to temperature sensing characteristic. In case of F-SENSOR, if setup voltage inputted to MICOM Referred to as Vf, Vf= (Rth*Vcc)/(R303+Rth). Here, Rth is resistance value of thermistor corresponding to temperature. See conversion table of "Refer 6" of this manual on resistance and voltage of sensor about temperature for Reference. As terminal voltage of MICOM corresponding to temperature is also designated, Refer to it at A/S time.
27
8-6) Key Scan & Display Circuit Part
Key Scan and Display Operation As is seen on each wave form of the following, send "HIGH" output in an order of MICOM PIN NO #3#4#5#6#7#8 for 2msec in a cycle of 12msec using six terminals of MICOM NO #3, 4, 5, 6, 7, 8. This signal appears onto output terminal through input terminal of IC05(UDN2981 or KID65783AP). At this time, peak-to-peak voltage of the spherical wave is about 11V(DC RMS1.5), and form of output wave form is like the drawing 1.
Key Scan When the wave form of GRID#2 is outputted, this signal is provided to SW6 button through the resistance of 10 . When SW6 is pressed at this time, signal gets smaller by R501(12 ), and about 4.5V of peak-to-peak voltage is applied to MICOM. MICOM judges that the wave form of GRID#1 is inputted, and changes function corresponding to SW6 KEY. In this way, each wave form of GRID is recognized.
28
8-7) Load Operation Circuit Part
When "HIGH" signal is applied to INPUT terminal of IC03(KID65003AP) from MICOM PIN NO #16(P07), IC is turned on. At this time, V12(DC12V) which is applied to the one terminal of coil of COMP relay flows to ground through output of IC03. Then core generates magnetic field to turn on the connection point, and it applies voltage of 230V to COMP load to turn on COMP. When MICOM PIN NO #16 changes to "LOW" state, electricity cannot flow to COMP relay coil because IC is turned off. So relay connection point becomes to OFF state and stops COMP. COMP & F,R Defrost Heater Inter-operation Explanation
Like the above block diagram, operation of F, R defrost heater is determined according to the operation of relay for COMP. When COMP relay is connected to NO terminal, COMP operates. However, in case of F, R defrost heater, electricity does not pass through the heater though relay works. But, if COMP relay is connected to MC terminal, COMP does not operate and heater gets electricity according to operation of F, R defrost relay. Purpose of application of above circuit: It aims to interrupt electricity passage through F, R defrost heater even though F, R defrost relay is bad while COMP is operating.
29
8-8) BLDC Motor Operation Circuit Part
In case Fan Motor is locked, therefore, when Fan Motor is constrained to less than about 600rpm in order to prevent over-current to the power source group, PIN #39, #38 and #37 sense it so that they can stop Fan Motor operation. If Fan Motor operation is stopped by this function, it becomes to re-operate every 10 second. If Motor Connector is separated under the state where the power source is applied during service, Micom recognizes it as Fan Motor is constrained so that Micom can stop Motor. Then Motor resumes to operate after 10 seconds. However, there are a part of products which re-operate every about 5 minute among the products which were manufactured in February and March. Therefore, when the product is completely repaired, confirm the repaired state with power-ON again after power-OFF if possible.
30
8-9) Various Option Function
When pressing the temperature control s/w of freezer and vacation s/w for 12 sec. continuously at the same time, display is converted into option setup mode. When display is converted into option setup mode, every display except for temperature display of freezer and Refrigerator turns off like the following.
On display like the above, temperature display of Refrigerator indicates items of option, and temperature display of freezer indicates setup value for each item.For the temperature display of Refrigerator, when temperature control s/w is pressed, option items increase, and when vacation s/w is pressed, option items decrease. For the temperature display of freezer, when temperature control s/w is pressed, option setup value increases, and when vacation s/w is pressed, option setup value decreases. If waiting for 20sec. after changing option by controlling s/w, option setup value is saved to EEPROM, and option setup mode is canceled automatically and restored normal display. For example, if you want to shift temperature of Refrigerator by -3°C by controlling option, follow the processes of below. 1) Press temperature control s/w and vacation s/w of freezer for more than 12 sec. simultaneously : all displays become off except temperature display of freezer and Refrigerator. 2) Pressing temperature control s/w of Refrigerator for one time, "1" is indicated on Refrigerator display : If indication "1" is displayed on Refrigerator display, it shows temperature setup of Refrigerator, and current temperature setup value of Refrigerator is indicated on temperature display of freezer. 3) If temperature display of freezer indicates "9" this time, check value which is set at present from the table in the next page. In this case, you can see that temperature is changed to +1.0°C compared to the standard temperature according to the table : Here, in order to change by -3.0°C, (+1.0°C) + (-3°C) = -2.0°C is calculated. 4) Now Refer to the table on the next page to change temperature to -2°C. Press temperature s/w and quick freeze s/w of freezer for temperature control display to indicate "4": Waiting for 20sec. after setup, MICOM saves setup value to EEPROM and returns to the normal display and cancel option setup mode.
Caution When product is delivered, option function is set to EEPROM from the plant, therefore, Refrain from intentional change except for special case. Option function setup is completed only after it is returned to the normal display after 20sec.. So do not turn power off before display returns to the normal state.
31
8-10) Option Related to Temperature Freezer Temperature Change Table Set item Freezer temperature change mode Refrigerator display "0" Example
- When set to -2.5°C, compared with the standard temperature of freezer
Temperature change 0 - 0.5°C - 1.0°C - 1.5°C - 2.0°C - 2.5°C - 3.0°C - 3.5°C
Freezer display "0" "1" "2" "3" "4" "5" "6" "7"
Temperature change + 0.5°C + 1.0°C + 1.5°C + 2.0°C + 2.5°C + 3.0°C + 3.5°C + 4.0°C
Freezer display "8" "9" "10" "11" "12" "13" "14" "15"
Refrigerator Temperature Change Table( : corresponding lamp is on, : corresponding lamp is off) Example - When set to +2.5°C, compared with the standard temperature of Refrigerator
Set item Refrigerator temperature change mode
Refrigerator display "1"
Temperature change 0 - 0.5°C - 1.0°C - 1.5°C - 2.0°C - 2.5°C - 3.0°C - 3.5°C
Freezer display "0" "1" "2" "3" "4" "5" "6" "7"
Temperature change + 0.5°C + 1.0°C + 1.5°C + 2.0°C + 2.5°C + 3.0°C + 3.5°C + 4.0°C
Freezer display "8" "9" "10" "11" "12" "13" "14" "15"
32
8-11) Option Related with Ice Maker Following options are applied only for models which are equipped with ice maker.
It is water supply time option that operates when the flow sensor for time control function of water-supply for ice maker is out of order (identical with DIP s/w of existent ZIPEL). Set item Ice maker water supply time Water supply time 5sec 4sec 3sec 6sec 7sec 8sec 9sec 10sec 12sec 13sec 15sec 17sec 19sec 21sec 23sec 25sec Refrigerator display "3" Freezer display "0" "1" "2" "3" "4" "5" "6" "7" "8" "9" " 10 " " 11 " " 12 " " 13 " " 14 " " 15 "
It is the temperature of ice making sensor which checks whether the ice of ice-maker of temperature change of ice making sensor freezes completely. Set item Ice making temperature Temperature change - 7°C - 6°C - 8°C - 9°C - 10°C - 11°C - 12°C - 13°C Refrigerator display "4" Freezer display "0" "1" "2" "3" "4" "5" "6" "7"
Example - When ice making sensor is set to -10°C
When Refrigerator temperature display indicates "2", the data indicated on the freezer temperature display is the function which is not used in this model so that additional adjustment is not necessary. If Refrigerator temperature display is not selected more than "2" during option function is setting among models which are equipped with dispenser and icemaker, replace the main PCB assembly.
Example - When water supply time is set to 9sec.
Note: If Refrigerator temperature control s/w and vacation s/w are used, several other options except the above functions are set. However, those points are omitted because they are not necessary part at the A/S time as they are items related with Refrigerator control function (Do not set options other than the above A/S manual contents).
33
9. Trouble Diagnosis & Repair Method
Pre-checkup
1. Check whether power cord is normally connected before repairs. 2. Practice checkup on the basis of Reference in the next page.
9-1) When power is not supplied Start
230V AC FUSE Disconnection?
Y
* power
cord terminal connection
N
Replace FUSE
N
Is power 230V applied to both terminals of CM10?
Y Is voltage about DC 320V applied to both BD1+terminals ? Caution Y
Check cord assembly connection.
N
As high pressure current more than DC300Vgenerates on the power part of main PCB, take great care in case of checkup and measurement.
Replace PCB pattern and BD1.
N
Is voltage DC5.8V applied between top s/w 223Y `C-S' ?
Y
Replace PCB assembly.
N
Is voltage 12V applied to both terminals of C102?
Y
Replace D104(D105) (S3L20U)(D10SC9M)
N
Is voltage 5V applied to both terminals of C103?
Y
Replace REG1 (7805).
N
Does panel PCB operate normally?
lead wire cable, door (connect Y
at HINGE-UP part)
Does load of relay and so forth operate normally?
Y N
Check cord assembly and repair Replace panel PCB
Normal
Replace the corresponding relay Check connection of lead wire
34
Pre-checkup
1. When power is applied initially, COMP works after 3~6 sec.. However, when COMP turns off during its operation, COMP doesn't work for 5min.. 2. COMP doesn't work during defrost 3. If freezer sensor is not connected, it is sensed as low temperature and COMP doesn't work.
9-2) When COMP doesn't work Start
N
Passed 5min. after COMP off?
Y
Check after 5 min.
Y
Reference 7
(Does alarm sound due to forced operation?)
Does COMP drive at forced operation?
N
Reference 4
Is MICOM #1601 HIGH applied?(5V) Replace MICOM and PCB
Y
Is freezer sensor normal?
Y
N
Repair open and connection state
N
Is IC03 #14 LOW applied?(0V) Replace IC03 and repair
Y
Is temperature sensor of main PCB is normal?
Y
Repair sensing part and replace PCB
Control cord and repair connection state
N
Reference 2
Replace COMP relay and repair
Y
Replace COMP RELAY
N
Is contact state of Connector CN70, CN71 is normal?
Y
Complete insertion of Connector
N
Is COMP assembly normal?
Y
Replace COMP ASS'Y and repair
Cord Assembly and Connection State
35
Judgment Condition
1. At the initial power on, cooling operation is normally carried out. However, after a certain time passes (when defrost time comes), badness occurs on Refrigerating and freezing work. It is a case where there is defect on defrost part. Checkout whether there is defect on defrost system by Referring this trouble diagnosis.
9-3) Defrost function does not work
7-7 self-diagnosis * Refer to of main function. function
Start
Is F, R defrost sensor normal by self-diagnosis?
Y N
Replace and repair the corresponding sensor
N
Is F, R defrost heater normal by self-diagnosis? to load defect checkup * Refer this manual Ref 3. on
Y
Check temperature fuse, heater itself, cord disconnection, cord contact state
N
Is temperature of corresponding defrost sensor below -5°C? in * Judge Refaccordance with Ref 4 and 8 on this manual.
Y
Forced operation for certain time
Perform forced defrost for F and R simultaneously. 7-6) * Refer tomain test function of the function. Is power applied to each defrost heater?
Y N
B
A Reference
1. If each EVA-SENSOR of F room and R room has open or short-related defect, electricity does not flow to defrost heater and it returns to normal operation after pause time passes. Therefore, if the period when defrost heater does not work accumulates, Refrigerating and freezing badness results. 2. If temperature fuse which is a safety device is turned off, or defrost heater has wire disconnection, or relay on PCB is bad, defrost is done by natural temperature rise. In this case, period of COMP off according to defrost becomes very long so that badness on Refrigerating and freezing function results.
36
A
N
Does it return to cold operation after heating for certain time?
Y
Recheck troubles of corresponding sensor that does not return.
Normal
* When temperature of F, R defrost sensor reach more than +5°C and +15°C by heating, terminate heating and convert into cooling operation after pause.
B
Is connection terminal of MAIN-PCB part normal?
Y
N
Repair connection terminal
Check troubles on corresponding defrost heater relay, badness of PCB, and defect on normal/close terminal connection of COMP RELAY. Replace and repair bad relay or replace PCB ASS'Y
Refer to load operation circuit *part and checkup method on relay defect on Ref 2
37
9-4) Self-diagnosis Abnormality Occurs When abnormality on outer temperature sensor occurs Start
Is insertion of main PCB connecter(CN31) normal?
Y N
* Reference 4
Is outer temperature sensor forging normal?
Y
N
Repair badness on connector contact or omission
Replace temperature sensor
N
Is voltage input of MICOM PIN #60 normal?
Y
Check main-PCB cold lead or short
No defect on PCB and temperature sensor. Recheck connector contact badness
When abnormality of temperature sensor of Refrigerator occurs
Start
* Reference 4
Is outer temperature sensor forging normal?
Y
N
Replace temperature sensor.
N
Is insertion of MAIN-PCB connector(CN30) normal?
Y
Badness on connector contact. Re-insert.
N
Is connection cord between main-PCB connector (CN30) sensors?
Y
Disconnection of wire between connector and sensor.
N
Is input voltage of MICOM PIN #58 normal?
Y
Check cold lead, short, lead touch.
No defect on PCB and temperature sensor. Recheck connector contact badness
38
When abnormality on defrost sensor of Refrigerator occurs.
Start
Is insertion of MAIN-PCB connector(CN30) normal?
Y N
Repair contact badness on connector(CN30) and uninserted part
N
* Reference 4
Is defrost sensor forging normal?
Y
Replace temperature sensor
N
Is connection between defrost sensor and connector normal?
Y
Repair the un-inserted Connecter or contact badness.
N
Is voltage input of MICOM PIN#59 normal?
Y
Check cold lead, short and lead touch
No defect on PCB and temperature sensor. Recheck connector contact badness
When abnormality on temperature sensor of freezer occurs
Start
Is insertion of main-PCB connector(CN30) normal?
Y N
* Reference 4
Is defrost sensor forging normal?
Y
N
Repair contact badness on connector(CN30) and uninserted part.
Replace temperature sensor
N
Is connection between defrost sensor and connector normal?
Y
Repair the un-inserted Connecter or contact badness.
N
Is voltage input of MICOM PIN#56 normal?
Y
No defect on PCB and temperature sensor. Recheck connector contact badness
Check cold lead, short and lead touch
39
When abnormality on defrost sensor of freezer occurs Start
Is insertion of MAIN-PCB connector(CN30) normal?
Y N
* Reference 4
Is defrost sensor forging normal?
Y
N
Repair contact badness on connector(CN30) and uninserted part.
Replace temperature sensor
N
Is connection between defrost sensor and connector normal?
Y
Repair the un-inserted Connecter or contact badness.
N
Is voltage input of MICOM PIN#57 normal?
Y
No defect on PCB and temperature sensor. Recheck connector contact badness
Check cold lead, short and lead touch
9-5) When alarm is continuously ringing When Ding-Dong sound continuously occurs Start
Is there any penetration of moisture to door s/w?
Y N
Replace DOOR S/W
N
Do input voltages of MICOM PIN #45, #46 change?
Y
(DOOR OPEN/CLOSE)
Repair cord disconnection and badness DOOR S/W
Is insertion of MAIN-PCB connector(CN30) normal?
Y
N
Repair the un-inserted Connecter or contact badness.
N
Is DOOR S/W itself normal?
Y
Replace DOOR S/W
MAIN-PCB and DOOR S/W are normal
Reference
Alarm for freezer/Refrigerator door open continues for 10sec. at the initial door open. After 2 min. of initial opening, it alarms for 10sec. by the 1min. cycle when door remains open (10 times of Ding-Dong sound).
40
When "Beep-Beep" sound continuously occurs
Start
Isn't forced operation or defrost selected?
Y N
Cancel forced operation or defrost.
N
Does buzzer sound occurs if power is reset?
Y
MAIN-PCB is normal
Check dirt insertion and short on test jumper part inside of the MAIN-PCB
Reference
Sound of "Beep-Beep" does not occur except abnormalities due to forced operation, defrost or self-diagnosis abnormality. In case of self-diagnosis abnormality, it is easy to check because it is indicated on panel-display. If "Beep-Beep" sound continues to ring though panel display is normal, it is considered that forced operation or defrost is selected.
In case PANEL-DISPLAY is not lit
Start
Is connector insertion of HINGE-UP cover normal?
Y N
Re-insert connector, repair badness on contact
N
Is insertion of MAIN-PCB connector(CN50) normal?
Y
Re-insert connector inside of the MAIN-PCB.
N
Is connector insertion of the panel dispenser part normal?
Y
Re-insert connector, repair badness on contact.
Replace PANEL-DISPLAY
41
When key selection of PANEL-DISPLAY is not available
Start
Is connector insertion of HINGE-UP 14PIN of freezer normal?
N
* Repair on the basis of connection diagram of electric wire assembly cabinet-door of Reference 1.
Y
Re-insert connector. Repair contact badness
N
Is connector(CN50) insertion on the MAIN-PCB normal?
Y
Re-insert CN50 connector, correct and repair.
N
Is connector insertion of the PANEL-PCB part normal?
Y
Re-insert connector, correct and repair.
N
Is there any case that more than one key are pressed in a series?
Y
Continuous operation is impossible
Reassemble PCB base, resolve pressed part.
Is it badness of ZD501 or short-related defect on the MAIN-PCB
N
Y
Replace and repair ZD501.
N
Is GRID signal inputted to MICOM PORT #34?
* Check if corresponding GRID signal is inputted when PANEL-PCB S/W button is pressed.
Y
Replace and repair the MAIN-PCB ASS'Y
Repair corresponding button of PANEL-PCB, or replace PANEL ASS'Y PCB
42
9-6) When FAN does not work
When FAN of freezer(F-FAN) does not work (when COMP operates normally by temperature).
Start Is COMP in "off" state?
N Y
Allow forced operation.
Open freezer door
* Check only at the condition where Refrigerator door is closed.
N
Is F-FAN turned off?
Y
Check sensing circuit on PCB related with F-DOOR S/W. Replace and repair.
When pressing F-DOOR S/W, does FAN operate after delay time?
Y
* Judge on the basis of abnormality of DOOR S/W in "check item" of this manual Ref 5.
N
F-FAN is normal.
Y
Is voltage of DC7~11V applied to both terminals of fan?
N
Badness of fan itself. Replace and repair
N
* Refer to checkup method of relay badness on Ref 2.
Is contact of CN72 on PCB normal?
Y
Re-insert connector and repair.
Replace and repair MAIN-PCB ASS'Y.
Reference
"Check cooling fan only at the condition of selecting forced operation necessarily." 1. When COMP is turned off, cooling fan of freezer(F-FAN), cooling fan of Refrigerator(R-FAN), COMP, and cooling fan of COMP mostly retains "off" state. However, in case of R-FAN, it can operate for some period of time by natural defrost function if COMP is turned off.(It operates depending on temperature condition of Refrigerator) 2. Evenat forced operation condition, R-FAN is not always turned on (including normal operation), and retains "off" state if temperature of Refrigerator room is reached the set temperature. 3. When the door of freezer and Refrigerator is closed after opening, each fan has its delay time. That is, fan stops immediately when door is opened during its operation, and operates again after delay of about 10sec. or 1min. (when outer temperature is over 35°C) when the door is closed.
43
When Refrigerator fan (R-FAN) does not work (when temperature sensing function in
Refrigerator room is normal).
Start
Is COMP in "off" state?
N Y
Let forced operation.
Open refrigerator door to raise temperature inside of refrigerator
N
Is R-FAN turned off?
Y
Check sensing circuit on PCB related with R-DOOR S/W. Replace and repair.
With pressing R-DOOR S/W, does fan operate after delay time?
N
Y
* Judge on the basis of abnormality of DOOR S/W in "check item" of this manual Ref 5.
R-FAN is normal
Y
Is voltage of DC7~11V applied to the both terminals of FAN?
N
Badness on fan itself. Replace and repair.
N
Is contact of CN72 on the PCB normal?
Y
Re-insert connector and repair.
Replace and repair the MAIN-PCB ASS'Y
44
Caution
There exists the risk of electric shock when replacing the lamp inside of Refrigerator. Replace and repair at only "power off" state.
9-7) When lamp inside of Refrigerator is not lit.
Start
Is connector contact inside of Refrigerator normal?
N
* Inside of
cover of Refrigerator LAMP
Y Y
Re-insert connector and repair.
Is filament of LAMP broken?
N N
Replace LAMP in the Refrigerator.
Is there any abnormality on connection point of R-DOOR S/W?
Y
Check and repair R-DOOR S/W.
Check if voltage of 230V is applied to socket of R-LAMP and repair. Check on the basis of abnormality checking method for DOOR S/W of Ref 5.
45
Caution
There exists the risk of electric shock when replacing the lamp inside of freezer room. Replace and repair at only "power off" state.
9-8) When lamp inside of freezer is not lit.
Start
Is connector contact inside of freezer normal? Inside of cover of FREEZER-LAMP
Y Y N
Re-insert connector and repair.
Is filament of LAMP broken?
N N
Replace LAMP in the freezer.
Is there any abnormality on connection point of F-DOOR S/W?
Y
Check and repair F-DOOR S/W.
Check if voltage of 230V is applied to socket of F-LAMP and repair. Check on the basis of abnormality checking method for DOOR S/W of Ref 5.
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9-9) Abnormality diagnosis method for ICE-MAKER
Power Resource Terminal Check
Is DC electricity (5V, 12V) normally outputted?
Y N
N
Badness of power resource terminal
Replace the MAIN-PCB
Is ICE-MAKER dish horizontal?
Y
Disconnect connector like Ref. 8
Is resistance between both ends (between and ) of ice-eject motor within range of 18~22 ?
Y
N
Badness on motor
Kit Check (CN90 Terminal WIRE HARNESS)
Is TEST S/W(both ends of and ) open?
Y
N
Badness on TEST S/W
Is horizontal S/W(both ends of and ) open?
Y
N
Badness on MICRO S/W
Is ice-check S/W (both ends of and ) open?
Y
N
Badness on MICRO S/W
Sensor Check (Ref. 4)
Is ice-eject sensor (both ends of and ) within range written on table of Ref. 8?
Y
N
Badness on iceeject sensor
Motion Check
Pressing test s/w for more than 1.5sec., does it normally perform ice-eject and horizontal restoration and generate sound of "Ding-Dong" for one time?
Y
N
Badness on kit ASS'Y
Normal
Replace kit ASS'Y
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9-10) When cube and crushed ice are not normally operated.
When cube ice does not come out when cold cube ice is selected.
Start
Y
When cube ice is selected, does cube ice come out?
N
Isn't freezer door open? Close the door if it is open.
Y
When ice lever is operating, does cube ice come out?
N
Is micro port #20 on MAIN-PCB "HIGH"?
Y
N
Replace and repair MAIN-PCB ASS'Y
N
Is relay K76 turned on?
Y
Replace and repair relay RY76.
N
Does drill motor solenoid inside of freezer operate normally?
Y
Check lead wire and repair defected part
N
Is tap water normally supplied?
Y
Re-check the water supply point.
Normal
Reference
When motion system is normal, however, if there is no ice in the ice container, ice does not come out. Please ensure whether there is ice in the ice container.
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9-11) When solenoid which is cover ice-route delay device does not work Pre-checkup
1. Check whether solenoid automatically operates for 0.3sec. regardless of open/close of cover ice-route 8 sec. after initial power on. 2. Check whether Hinge-up connector contact is normal.
Start
Does S/V operate for 0.3 sec. when 8 sec. are passed after initial power on?
Y N
No defect on S/V control PCB ASS'Y and wire system
N
With the initial power on, does MICOM #18 on PCB indicate "HIGH" state for 0.3sec.?
Y
N
Replace MAINPCB ASS'Y
Check and repair devices such as stopper lever & support, etc Check ICE S/W. Check and repair wire connection system
N
When ice lever is pressed, does it maintain open state?
Y
MICOM control port is normal
N
At door-closed state, does ice conveying motor operate if ICE S/W is turned on?
Y N
After 8sec. from the point of initial power on, does IC03 #12 indicate "LOW" state for 0.3sec.?
Y
N
Badness of IC03. Exchange
Is cover closed after about 5sec. by S/V operation?
Y
Exchange defected parts after checking SSR71 or replace PCB ASS'Y.
Utilize checkup method for SSR defection of Ref. 2
No defect on cover ice-route control system
Reference
S/V is abbreviation of Solenoid Valve
49
10. Operation Principle & Repair Method of ICE-MAKER
10-1) Operation Principle of ICE-MAKER
Start
Y
Is it horizontal?
N
Performance of motion to retain horizontal level of ice-making dish for initial power apply or for restoration from stoppage of electric current.
ice-eject motor stop
Reverserotation of iceeject motor
Wait for 1 cycle (under -7°C)
Performance of ice-separation regardless of water supply to ice-making dish by waiting for 1 cycle.
Ice-eject step
After ice-making is finished, motion of iceseparation from ice on dish into storage container. Ice-separation is performed by checking the horizontal s/w, and the signal change of ice-inspection s/w and the changed time. They should be checked together in parallel.
Water supply step
After ice-making is finished, motion to supply icemaking water to ice-tray using water valve.
Ice-making step
This step means the period from when water supply is finished to when it is judged that water turned into ice completely. This is judged by parallel checkup of temperature and time.
Test step
Function for cases which are needed for forced operation for the purpose of operation test, A/S, and cleaning.Ice-separation motion and water supply motion are conducted continually and this step should have priority than any other operations.
50
10-2) Ice-maker Test Function
5. Test Function It is function for the case which needs forced motion for the purpose of cleaning and so on at the time of operation test and A/S. This function is performed when the test s/w which is equipped with the body of automatic ice-maker itself, is pressed for more than 1.5 sec.. 1) Test button does not go into test function during ice-eject, levelling for horizontal position and water supply. It operates in the horizontal state. It does not operate at the state where ice is fully filled. Only after ice full mode is cancelled and ice-check s/w is off, test function operates. 2) When test button is pressed in the horizontal state for more than 1.5sec., ice-eject motion starts immediately regardless of conditions of ice-making container. Therefore, if test function operates in the state where water does not freeze yet, water may be poured. So, care should be taken. After ice-eject motion, 1cycle of water supply is carried out in horizontal levelling movement. Therefore, the problems of ice-eject movement, horizontal levelling movement, and water supply can be checked by the test button. At this time, when the test function operates normally, buzzer sound "Ding-Dong" occurs and starts water supply function. Hence, if buzzer sound "Ding-Dong" doesn't occur, it may be considered that there is some abnormality so that check and repair are indispensable. 3)When water supply is finished, it operates in normal cycle of ice-making ice-eject horizontal restoration water supply in order.
NO
Item
Measures to Operate
Remark
01 under operation After finishing ice-eject, horizontal levelling and completion of water supply 02 Ice is full After removal of ice in ice container Turn ice-check lever On Off.
6. Function according to F-Room Door Open This is function to minimize noise occurrence by stopping operation basically when door F-room opens. 1) If F-room door opens while ice-eject or horizontal levelling is working, the function stops immediately at this point of time. When the door is closed, function operates normally. 2) In case water is being supplied, normal function is performed regardless of door open of F-room. 3) Accordingly, when F-room door is opened to check, if tray leans or its angle deviates from horizontal position, it is considered that it stops during ice-eject or horizontal levelling movement. It doesn't matter to judge it as a defect if it is not in horizontal position after more than 30sec. passes when F-room door is closed to keep horizontal state after water supply. In case it stops by