manual de servicio de la nevera lg (servicemanuals-lg-fridge-gcb197nfs-gc-b197nfs service manual)

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

REFRIGERATORSERVICE MANUAL

http://biz.lgservice.com

MODEL:GR-B207WVQ.CSWQAGE Color:Super White

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

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

PARTS IDENTIFICATION ........................................................................................................................................................5

HOW TO INSTALL THE REFRIGER ATOR .......................................................................................................................... 6

HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR ........................................................................................ 6

HOW TO INSTALL WATER PIPE........................................................................................................................................ 6

HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER ......................................................... 7

MICOM FUNCTION .............................................................................................................................................................. 8-12

EXPLATION FOR MICOM CIRCUIT..................................................................................................................................... 13

EXPLANATION FOR PWB CIRCUIT ................................................................................................................................. 13

COMPENSATION CIRCUIT FOR WEAK-COLD, OVER-COLD AT FREEZING ROOM.................................................... 14

PWB PARTS DRAWING AND LIST ................................................................................................................................... 35

PWB CIRCUIT DIAGRAM .................................................................................................................................................. 25

CIRCUIT................................................................................................................................................................................ 26

TROUBLE DIAGNOSI S........................................................................................................................................................ 27

TROUBLE SHOOTING ...................................................................................................................................................... 37

FAULTS ............................................................................................................................................................................ 45

COOLING CYCLE HEAVY REPAIR................................................................................................................................. 57

HOW TO DEAL WITH CLAIMS........................................................................................................................................ 65

HOW TO DISASSEMBLE AND ASSEMBL E..................................................................................................................... 66

DOOR............................................................................................................................................................................... 66

HANDLE ........................................................................................................................................................................... 67

SHROUD, GRILLE FAN ................................................................................................................................................... 67

EXPLODED VIEW .............................................................................................................................................................. 68-72

CONTENTS

- 2 -

Please observe the following safety precautions in order touse safely and correctly the refrigerator and to preventaccident and danger during repair.

1. Be care of an electric shock. Disconnect power cordfrom wall outlet and wait for more than three minutesbefore replacing PWB parts. Shut off the powerwhenever replacing and repairing electric components.

2. When connecting power cord, please wait for more thanfive minutes after power cord was disconnected from thewall outlet.

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

4. If the wall outlet is over loaded, it may cause fire. Pleaseuse its own individual electrical outlet for the refrigerator.

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

6. Use standard electrical components when replacingthem.

7. Make sure the hook is correctly engaged. Remove dust and foreign materials from the housingand connecting parts.

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

9. Please check the evidence of moisture intrusion in theelectrical components. Replace the parts or mask itwith insulation tapes if moisture intrusion wasconfirmed.

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

11. Do not let the customers repair, disassemble, andreconstruct the refrigerator for themselves. It maycause accident, electric shock, or fire.

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

13. Do not put flower vase, cup, cosmetics, chemicals,etc., or container with full of water on the top of therefrigerator.

14. Do not put glass bottles with full of water into thefreezer. The contents shall freeze and break the glassbottles.

15. When you scrap the refrigerator, please disconnect thedoor gasket first and scrap it where children are notaccessible.

WARNINGS AND PRECAUTIONS FOR SAFETY

- 3 -

SPECIFICATIONS

- 4 -

ITEMS SPECIFICATIONS

DIMENSIONS (mm) 894(W)X725(D)X1753(H)

NET WEIGHT (kg) 110

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 (180g)

LUBRICATING OIL FREOL @10G (310 cc)

DRIER ID 0.83

ITEMS SPECIFICATIONS

CAPILLARY TUBE MOLECULAR SIEVE XH-7

FIRST DEFROST 4 - 5 Hours

DEFROST CYCLE 13 - 15 Hours

DEFROSTING DEVICE Heater, Sheath

ANTI-FREEZING HEATER Damper Heater

FREEZER LAMP 40W (1 EA)

REFRIGERATOR LAMP 40W (1 EA)

<Front View> <Plane View>

3. Model spec.

257

3571

4

PARTS IDENTIFICATION

- 5-

Frame Display

Cover PWB

2. Ref No.

Conversion switch(Meats/Vegetables)

1. How to Adjust Door Height of Refrigerator Make the refrigerator level first. (If the refrigerator is not installed on the flat floor, the height of freezer and refrigerator door maynot be the same.

1. If the height of freezer door is lower than that ofrefrigerator compartment :

2. If the height of freezer door is higher than that ofrefrigerator compartment :

Insert a driver into the groove of adjusting screwand rotate driver in arrow direction (clockwise) until therefrigerator becomes horizontal.

Insert a driver into the groove of adjusting screwand rotate driver in arrow direction (clockwise) until therefrigerator becomes horizontal.

HOW TO INSTALL REFRIGER ATOR

- 6 -

1

1

2

2

Adjusting

Adjusting

Driver

Driver

Even if the height can not be aligned by using the height adjustment screw,insert the transparent sheet supplied with the product.

Bottom bracket

Transparent sheetBottom hinge

Separate the door with the lower height,use the (+) type screwdriver to unscrew the screw at the botton hinge as shown at figure , insert the transparent sheetbetween the bottom hinge and the bottom bracket,and then fix it with the screw as shown at figure .

Insert more transparent sheets enough to align the height.(4 sheets are supplied in total.)

Install Water Filter (Applicable to some models only)Before Installing water filter

1. Before installing the filter, take out the top shelf of therefrigerator after tilting it to the direction ( ) and lifting itto the direction ( ) and move it to the lower part.

2. Lamp in refrigerator compartment

Installing water filter1. Initial installation of water filter

Remove the filter substitute cap by turning itcounterclockwise ( ) by 90 degrees and pulling it down.

Note : Keep it safe to use it later when you do not use thefilter.

Remove the red cap from the filter and attach thesticker. Insert the upper part of the filter ( ) afteraligning 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 fasteningindication line are aligned.

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

Note : Check that the guideline and the looseningindication line are aligned.

After installing water filterReassemble the lamp cover and the top shelf of therefrigerator. To place the top shelf of the refrigerator, raisethe front part of the shelf a bit so that the hook of the shelfis fit into the groove.In order to clean the water filter system, drain water forabout 3 min.Note : Then open the door of the refrigerator and check for

water droppings on the shelf under the filter.

Control box

Aligning with the guide lineand the fastening indication line

Aligning with the guide lineand the loosening indication line

Control box

Separationof red cap

Adhesionsticker

Substitutecap

HOW TO INSTALL REFRIGER ATOR

- 7 -

Insert the tool into the marked area ( ) andpush the tool to disconnect.Use the tool with the flat tip such as ( - ) screwdriver.Turn the bulb counterclockwise. Max. 40 Wbulb for refrigerator is used and can bepurchased at a service center.

3

3

1. Monitor Panel

MICOM FUNCTION

- 8-

2. Description of Function2-1. Funnction of Temperature Selection

* The temperature can vary ±3 °C depending on the load condition. *( ) : 127V/60Hz, 110~115V/60Hz, 115V/60Hz Rating ONLY.*< > : TAIBEI

1. When power is initially applied or reapplied after power cut, “Medium” is automatically selected.2. When the temperature selection switch in the freezer and refrigerator compartments is pressed, the light is on in the

following sequence:"Middle" "Middle Strong" "Strong" "Weak" "Middle Weak"

3. The temperature setting condition of freezer and refrigerator compartments shall not be indicate in the standard model when refrigerator or home bar door is closed.

Divisio n Power Initial ly On 1st Pres s 2nd Pres s 3th Pres s 4th Press

-19 °C 3 °C -22 °C 2 °C -23 °C 0 °C -15 °C 6 °C -17 °C 4 °CChange of

Indication Lamp

TemperatureControl Middle Middle Strong Strong Weak Middle Weak

-19 °C(-18 °C)<-19 °C>

3 °C<2 °C>

1.5 °C<1 °C>

0 °C<0 °C>

6 °C<4.5 °C>

4.5 °C<3 °C>

-21 °C(-21 °C)<-21 °C>

-23 °C(-22 °C)<-22 °C>

-15 °C

<-16.5 °C>

-17 °C

<-18 °C>

Freezer Control

RefrigerationControl

1. 88 LED

Function display board

FREEZER

Temperature adjustment botton for freezer compartment

Temperature adjustment botton for refrigerator compartment

Express freezer Lock button

EXPRESS FRZ.

FRZ

REFRIGERATOR

CHILD LOCK3secs

2-2. Control of variable type of freezing room fan1. To increase cooling speed and load response speed, 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 highspeed 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 freezingroom fan motor normally operates (If being operated in the high speed of RPM, it converts operation to the standardRPM). 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 determiningthat 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 inthe cycle of 30 minutes. If normal operation is performed, poor status is released and refrigerator returns to the initialstatus (reset).

2-3. Control of M/C room fan motor1. 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 in fan motor of freezing fan motor (refer to failure diagnosis function table for failuredisplay).

2-4. Door opening alarm1. 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 0.5 second after the first one-minute has passed after doors are opened andthen repeats three times of On/Off alarm in the cycle of every 30 seconds.

3. If all the doors of freezing / cold storage room or home bar are closed during door open alarm, alarm is immediatelyreleased.

2-5. Ringing of button selection buzzer1. If pressing the front display button, “Ding ~ “ sound rings.

2-6. Ringing of compulsory operation, compulsory frost removal buzzer1. If pressing the test button in the main PCB, “Phi ~ “ sound rings.

2. In selecting compulsory operation, alarm sound is repeated and completed in the cycle of On for 0.2 second and Off for1.8 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 for0.2 second, On for 0.2 second and Off for 1.4 second three times.

MICOM FUNCTION

- 9 -

Doors of freezing / cold storage room

or home bar

BUZZER

Closing Opening

Withina minute

A minute 30seconds

30seconds

30seconds

OpeningClosing Closing

3 Times 3 Times 3 Times 3 Times

2-7. Frost removal function1. Frost removal is performed whenever total operation time of compressor becomes 7 ~ 7.5 hour.2. In providing initial power (or returning power failure), frost removal starts whenever total operation time of compressor

becomes 4 ~ 4.5 hour.3. Frost removal is completed if temperature of a frost removal sensor becomes more than 5°C after starting frost removal.

Poor frost removal is not displaced if it does not arrive at 5°C 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).

2-8. Sequential operation of built-in productBuilt-in products such as compressor, frost removal heater, freezing room fan, Cooling Fan and step motor damper aresequentially operated as follows for preventing noise and part damage occurred due to simultaneous operation of a lot ofparts in applying initial power and completing test.

MICOM FUNCTION

- 10-

Function Load Operation Sequence Remark

rewo

plait

inI

g niy

lppa

nIE

DO

MT

SET

When temperatureof a frost removalsensor becomesmore than 45°C(In purchase,movement)

If error occursduring operation,initial operation isnot done.

If pressing switchonce more in thetest mode 2 ortemperature of afrost removalsensor is morethan 5°C, itimmediatelyreturns to the testmode for initialoperation(COMP operatesafter 7 minutes).

Whentemperature of afrost removalsensor becomesless than 45°C(In power failure,service)

Test mode 1 (Compulsoryfunction)

Test mode 1 (Compulsoryfunction)

Test mode 2 (Compulsory frostremoval)

POWER

ON

COMP

ON

COMP

ON

F-FAN&

C-FANON

F-FAN&

C-FANON

F-FAN&

C-FANON

F-FAN&

C-FANOFF

STEPMOTOR

DAMPERON

STEPMOTOR

DAMPERON

STEPMOTOR

DAMPEROPEN

STEPMOTOR

DAMPERCLOSE

HOMEBAR

HEATERON

POWER

ON

FROSTREMOVALHEATER

ON

HOMEBAR/PIPE

HEATEROFF

HOMEBAR/PIPE

HEATERON

TESTS/W

(PressOnce)

COMP

ON

TESTS/W

(Press3 times)

0.5sec.

0.3sec.

0.3sec.

0.3sec.

0.5sec.

8sec.

0.3sec.

5sec.

FROSTREMOVALHEATER

OFF

FROSTREMOVALHEATER

ON

27sec.

0.3sec.

0.3sec.

0.3sec.

0.3sec.

0.3sec.

0.3sec.

0.3sec.

5.6sec.

OTHERLOADOFF

F-FAN&

C-FANON

F-FAN&

C-FANOFF

STEPMOTOR

DAMPEROPEN

TESTS/W

(Press2 times)

COMP0.3sec.

0.3sec.

0.3sec.

OFF

2-9. Function of Trouble Diagnosis(88-LED)1. Failure diagnosis function is function to facilitate service when nonconforming matters 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 LED, which are placed at the display part of a refrigerator. All the LED graphicsother than a failure code are turned off.

In display of the failure mode, all LEDs of setting temperature for freezing/ setting temperature for cold storage are turnedoff (excluding Note1 and Note2).

MICOM FUNCTION

- 11 -

: Normal Operation

1

2

3

4

5

6

7

8

9

10

11

Er FS

Er rS

Setting temperaturedisplay (Note 2)Er dS

Er dH

Er FF

Er CF

Er CO

Setting temperaturedisplay (Note 1)



Failure code display partSetting

temperaturefor freezing

Settingtemperature for

cold storage

No. Item Contents of failure FreezerFanCompr essor Stepping

motor damperDefros tHeater

M/C roomFan

Product operation status in failure

Failure of freezersensorFailure of refrigeratorsensor 1Failure of refrigeratorsensor 2Failure of frostremoval sensorPoor of frostremoval

Failure of BLDC FANat freezing room

Failure of BLDC FANat machine room

Failure ofCommunication

Failure ofOutside SensorFailure of iceremoval sensorFailure of icemaker unit

Snapping or short-circuit offreezer sensorSnapping or short-circuit ofrefrigerator sensor 1Snapping or short-circuit ofrefrigerator sensor 2Snapping or short-circuit of frostremoval sensorSnapping of frost removal heateror temperature fuse, pull-out ofconnector (indicated minimum 4hours after failure occurs)Poor motor, hooking of wires tofan. Contact of structures to Fan.Snapping or short-circuit of L/wire(if there is no fan motor signal formore than 115 seconds inoperation of fan motorConnection between main PCBand display PCB. Snapping orshort-circuit of L/wire.Transmission between main PCBand display PCB. Poor TR andreceiving part.Snapping or short-circuit of outsidetemperature perceiving sensorSnapping or short-circuit of ice-making sensorPoor motor or Hall IC within ice-makerunit. Snapping or short-circuit ofL/Wire. Poor main PCB drive circuit.

StandardRPM

StandardRPM

StandardRPM

StandardRPM

StandardRPM

OFF

StandardRPM

StandardRPM

OFF

ON for 15minutes OFF for 15minutes

No frostremoval

Open for 10munutes,closing for 15 minutes

Failure Code Display PartBAISE

FRZ TEMP

EXPRESS FRZ CHILD LOCK

REF TEMP

Note1) In error of outside sensor, setting temperature for freezing/ cold storage is normally displayed and indicated “Er” onthe outside temperature display part (normally displayed except for the outside temperature display part).

Note2) Nonconforming contents of poor R2 sensor, ice-making sensor and ice-making kit are displayed in LED check, notindicated on the failure display part (when pressing freezing temperature adjustment button and special freezingbutton for a second or more).

HOME BAR SENSOR

AABBCCDD

2-10. Test Function1. 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 irrespective 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. Even if pressing the test button during failure code display, test mode will not be performed.

Test 1

Test 3

Test 2

NormalStatus

Mode Manipulation Content Remarks

Press test button once(freezing force mode)

Press test button once atthe test mode 2 status(compulsory frost removalmode)

Press test button once atthe test mode 1 status(compulsory frost removalmode)

Press test button once atthe test mode 3 status(freezing force mode)

1. Continuous operation of compressor2. Continuous operation of freezing room fan

(high speed RPM) and M/C room fan3. Frost removal heater OFF4. Full opening status (baffle opened) status of

electronic step motor damper5. All display LED graphics - ON.

1. Compressor OFF2. Freezing room fan and M/C room fan is

turned off.3. Frost removal heater ON4. Full closing status (baffle closed) status of

electronic step motor damper5. All display LED graphics - OFF

(88LED: Except for (A)22 (B)22 LEDs Bar, Dot LED: Except for only middle NotchBar Graphics)

1. Compressor OFF2. Freezing room fan(high speed RPM) and M/C room fan is turned off.2. Freezing room fan(normal speed RPM) and M/C room fan is turned off.3. Frost removal heater OFF4. Full closing status (baffle closed) status of

electronic step motor damper5. All display LED graphics - OFF

(88LED: Except for (A)22 (B)22 LEDs Bar, Dot LED: Except for only middle NotchBar Graphics)

Return to the initial status.

Compulsory function

Compulsory function

Check freezing room fan

Compressor is operatedafter 7 minutes.

MICOM FUNCTION

- 12 -

•

Return to the normal mode when the defrostsensor is above +5

•

°C

1. Explanation for PWB circuit

1-1. Power circuit

Voltage of every part is as follows:

Part VA1 CM1 CM2 CE2 CE4Voltage 220 Vac 14 Vdc 17 Vdc 12 Vdc

EXPLATION FOR MICOM CIRCUIT

- 14 -

5Vdc

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/receptionof inside elements of IC1 (MICOM). The OSC1 must always use rated parts since if SPEC is changed,time calculated atthe IC1 may be changed or no operation is done.

1-3. Reset circuitThe 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 orwhen power is applied again to MICOM by a spontaneous power failure. ‘LOW’ voltage is applied to the reset terminalof 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).

2) GC-B207W

The fan motor at the freezing room does not stop but operates if opening doors of the freezing room or cold storage roomor the home bar during operation of the fan motor at the freezing room.(A), (B), (C) and (D) of door switch for the freezing room or cold storage room are connected to the door open sensingcircuit 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 door openingif even one of both is opened.


- 14-

Measuring part (IC4)

Status

The circuit has been only applied to voltage except 220v.

ON Within 1 VOFF 12 V

Type of LoadFrost Removal

HeaterR-roomLAMP

Home-barHeater

AC ConvertingRelay

R-room FAN MOTOR

High speed Normal speed

No.10 No.11 No.12 No.16 No.15 No.13 No.14

COMP

Since door switch sensing switch (A), (B) are a separate switch even if the door switch of the freezing room normallyoperates, they may fail to sense door opening in the failure of switch at both ends of (A) and (B) or in failure of the L/wire.Lamp does at the cold storage room not turn on if the door switch of the cold storage room fails to sense the door openswitch (c ), (d) or the home bar switch(e ), (f).


- 16 -

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

Opening 0 V ( A - B , C - D , S/W at both ends are at On status)

Measuring partIC1 (MICOM) No. 47, 46 Pin

Door of Freezing/Cold Storage Room

CONDITIONSBell sounds when button on Beep sounds when warning

MEASURING dosplay is pressed. door opening.OFF

POINTS

IC1 (No. 50 Pin) 0 V

IC1 (No. 50 Pin) 0 V

0.05 s

2.63 kz (DING) 2.63 kz (BEEP) OFF2.21 kz (DONG)

0.2 s 0.1 s 0.4 s 0.5 s 0.5 s

5 V

0 V

5 V

0 V

5 V

0 V

5 V

0 V

2.Buzzer driving circuit

3.Door opening sensing circuit

, E - F

, E - F

1-5. Switch entry circuitThe following circuits are entry circuits for sensing signal form test S/W, electronic single motor damper reed S/W forexamining refrigerator.

1-6. Option designation circuit (model separation function)

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

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


- 17 -

Separatio n Connection Status Application Standard

Connectio OTHER AREA(VOLATILE)OP1

OUT Domestic

1-7. Stepping motor operation circuit

Connection DISPENSER MODELOP2

OUT NON-DISPENSER MODEL

For motor driving method, rotation magnetism is formed at coils wound on each phase of motor and stator and so motorbecomes to rotate if applying “High” signal to the IC6 (TA774AP) at the MICOM PIN 41 and outputting “High”, “Low” signalby step numbers fixed through MICOM PIN 42 and 43.

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

EXPL ATION FOR MICOM CIRCUIT

- 18-

(Reverse rotation) (Positive rotation)

1-8. Temperature compensation and over-cool/weak- cool compensation circuit

1. Temperature compensation at freezing room, cold storage room

冷藏室温度补偿

冷冻室温度补偿

Freezing room

Temperaturecompensation

Temperaturecompensation

Refrigerator room

Resistance value(RC F1） Resistance value(RC F1）Remarks

Reference temperature

Warmlycompensate

Coollycompensate

180 kΩ +5 °C 180 kΩ +2.5 °C

56 kΩ +4 °C 56 kΩ +2.0 °C

33 kΩ +3 °C 33 kΩ +1.5 °C

18 kΩ +2 °C 18 kΩ +1.0 °C

12 kΩ +1 °C 12 kΩ +0.5 °C

10 kΩ 0 °C 10 kΩ 0 °C

8.2 kΩ -1 °C 8.2 kΩ -0.5 °C

5.6 kΩ -2 °C 5.6 kΩ -1.0 °C

3.3 kΩ -3 °C 3.3 kΩ -1.5 °C

2 kΩ -4 °C 2 kΩ -2.0 °C

470Ω -5 °C 470Ω -2.5 °C

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.

u Temperature compensation table at the refrigerator room is as follows:

u This circuit is a circuit to enter the necessary level of temperature compensation for adjusting different temperature everymodel at the cold storage room into MICOM.


- 19 -

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 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C 4 °C 4.5 °C 5 °C470Ω change Up Up Up Up Up Up Up Up Up Up

0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C 4 °C 4.5 °C2 kΩ Down change Up Up Up Up Up Up Up Up Up

1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C 4 °C3.3 kΩ Down Down change Up Up Up Up Up Up Up Up

1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C5.6 kΩ Down Down Down change Up Up Up Up Up Up Up

2 °C 1.5 °C 1 °C 0.5 ° No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °CRerigerator 8.2 kΩ Down Down Down Drop change Up Up Up Up Up Up

room 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C(RCR1) 10 kΩ Down Down Down Down Down change Up Up Up Up Up

3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C12 kΩ Down Down Down Down Down Down change Up Up Up Up

3.5 °C 3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C18 kΩ Down Down Down Down Down Down Down change Up Up Up

4 °C 3.5 °C 3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C33 kΩ Down Down Down Down Down Down Down Down change Up Up

4.5 °C 4 °C 3.5 °C 3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C56 kΩ Down Down Down Down Down Down Down Down Down change Up

5 °C 4.5 °C 4 °C 3.5 °C 3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No180 kΩ Down Down Down Down Down Down Down Down Down Down change

Modificationresistance

Currentresistance

1-9 . Compensation circuit for weak-cold, over-cold at freezing room

The above option circuit is a circuit to compensate for temp erature at the cold storage room by simply cutting in service.

Compensation Compensation for weak-cold for over-cold Temperature compensation value Remarks

JCR3 JCR4 JCR1 JCR2at cold storage room

0 °C (In shipment from factory)

CUT -1 °C

CUT -1 °C

CUT +1 °C

CUT +1 °C

CUT CUT -2 °C

CUT CUT +2 °C

CUT CUT 0 °C

CUT CUT 0 °C

CUT CUT 0 °C

CUT CUT 0 °C

CUT CUT CUT -1 °C

CUT CUT CUT +1 °C

CUT CUT CUT CUT 0 °C


- 19 -

Temperature compensation in CUT

JCR1 +1?

JCR2 +1?

+2?

JCR3 -1?

JCR4 -1?

-2?

1-10. Key Button Input and Display Lighting CircuitThis circuit is to judge the work of function control button on the operation panel and to light each function indication led(LED module). It is driven by SCAN method.


- 21-

1-11 Sensor resistance characteristics table

u Resistance value allowance of sensor is ±5%. u When measuring the resistance value of the sensor, allow the temperature of that sensor to stabilize for at least 3 minutes

before measuring. This delay is necessary because of the sense speed relationship. u Use a digital tester to measure the resistance. An analog tester has to great a margin of error.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.


-22 -

Measuring Temperature ( °C) Freezing Sensor Refrigerator sensor 1&2

Defrost sensor, Ambient 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

23

2.PWB Parts Drawings and List2-1.PWB Assembly Main Parts Drawings


23

RESISTOR,METAL GLAZED(CHIP)

RESISTOR,FIXED CARBON FILMRESISTOR,FIXED CARBON FILM

RESISTOR,METAL GLAZED(CHIP)RESISTOR,METAL GLAZED(CHIP)


66656463

6162

0RH1004L622

0RD4701G609 0RD1002G609

0RH1002L622 0RH4701L622

0RH2001L622

57

605958

565554

DIODE,RECTIFIERSDIODE,RECTIFIERS

DIODE,RECTIFIERSDIODE,RECTIFIERS

DIODE,RECTIFIERS

IC,POWER MANAGEMENT

RESONATOR,CERAMIC

IC,POWER MANAGEMENT

RESISTOR,FIXED POWER COATED WIRE-WOUND

RESISTOR,FIXED CARBON FILMRESISTOR,METAL GLAZED(CHIP)

RESISTOR,FIXED POWER COATED WIRE-WOUND

CAPACITOR,FIXED ELECTROLYTIC








CAPACITOR,FIXED FILM



CAPACITOR,FIXED CERAMIC(HIGH DIELECTRI)

CAPACITOR,FIXED CERAMIC(HIGH DIELECTRI)CAPACITOR,FIXED CERAMIC(HIGH DIELECTRI)CAPACITOR,FIXED CERAMIC(HIGH DIELECTRI)

CAPACITOR,FIXED CERAMIC(HIGH DIELECTRI)CAPACITOR,FIXED CERAMIC(HIGH DIELECTRI)RESISTOR,FIXED POWER COATED WIRE-WOUNDRESISTOR,FIXED CARBON FILMRESISTOR,FIXED METAL OXIDE FILMRESISTOR,FIXED CARBON FILMRESISTOR,FIXED CARBON FILMRESISTOR,FIXED CARBON FILM


CAPACITOR,FIXED CERAMIC(HIGH DIELECTRI)RESISTOR,METAL GLAZED(CHIP)

CONNECTOR (CIRC),WAFERCONNECTOR (CIRC),WAFER

CONNECTOR (CIRC),WAFER

0CE686ZU6E0

0RD6801G609

0RD1801G609 0RH1001L622

0RW0560J609

0RD1200G609 0RD6800G609 0RW0101J609

51

5251

53

504948 0CK223DK96A

0CK471DK96A 0RW3303J609 0RD5603H609 0RS5602K641

0CK102DK96A 0RH0000L622

44

4645

47

42

34

0CK104DK94A 0CK223DK96A

0CK224DK94A

0CF3340867041

35

33

32

3130

2928

16RELAY 6920000001A

0DB360000AA 0DD400409AC

0DRSA00090A

0DRSA00090A

0DR107009AA

0CE476ZV6E0

27

2625

242322 6920ALZ001A

6212BA3041A

6920JB2009B

6920JB2004D

21

2019

17

18

RELAY

VARISTOR

RELAY

RELAY

9 0IPMGSK001A

0IKE650030C

0IKE704200A 0ITO777400A

0IKE431000A 0IKE780500Z

0IPMGNE001A

1514

13

121110

IC,LINEAR

IC,KECIC,DRAWING

IC,KEC

IC,KEC

6630JB8007L 6630JB8010A

6630JB8007E67

5

SMART,CHOHYANGSMART,CHOHYANG

ROHM

ROHM

ROHMROHM

ROHM

R11,20,21,24,26,31,37,38,44

R14-19,33,40,51R23

R12,49,50

R10 PRC TYPE-

ROCPROCPR8R9

R4R5R6

ALE15B12 MATSUSHITA 250VAC 16A 12VDC 1A NO VENTING

G5SB-14 OMRON 250VAC 5A 12VDC 1C NO-VENTING

DH12D1-O-Q (JAPAN) DEC 250VAC 10A 12VDC 1A

KID65003AF 16SOP BK 7CH DRIVE

KIA7042P KEC 3P BK RESETTA7774AP 16,SDIP BK DRIVE,IC STEPPING MOTOR

PS2561-1 NEC 4P,DIP BK = TLP762JFKIA431 3 PIN TP - -KIA7805PI - - - -

STR-G6351L SANKEN 5PIN TO220 ST SMPS 1 CHIP

917790-1 AMP 12P 2.5MM STRAIGHT SN917791-1 AMP 13P 2.5MM STRAIGHT SN

917784-1 AMP 6P 2.5MM STRAIGHT SNCONNECTOR (CIRC),WAFERCONNECTOR (CIRC),WAFERTRANSFORMER,SMPS[COIL]

V WORK

DESCRIPTION

6870JB8201D

6630VM02707 6630VM01111 6170JB2012C2

34

NoQty

1 PWB(PCB)

NOITACILPP A

YW396 YEONHO 11P 3.96MM YW396-11AV (11P-2,4,6,8,10)YW396 YEONHO 7P 3.96MM (7P-2,4,6)

GR-B217/257*A(G) BLDC 100-127V

SPEC


CAPACITOR,FIXED CERAMIC(HIGH DIELECTRI)











CC1

R2 PRC TYPER3 PRC TYPE

R1 PRC TYPE

CC14

CC16,18CC14(R)

CC10-13,15,17,19-21

CE11(85)

CC2

CC4-9CC3

CM3

CM2

CM1

CC2

CM3

CM2

CM1

37

36

31

SMART,CHOHYANG

SMART,CHOHYANG



SMART,CHOHYANGSMART,CHOHYANGSMART,CHOHYANG

MURATA

MURATA

MURATAROHM

SAM WHA,DOOSAN

MURATAMURATA

MURATAHONGMING(MTI)

24

0DRSD00100A DIODE,RECTIFIERS

0DRSD00100A DIODE,RECTIFIERS

0CE687ZH610 CAPACITOR,FIXED ELECTROLYTIC

0DD400409AC DIODE,RECTIFIERS

6870JB8201C1 PWB(PCB) VIKING-PJT BEST BASIC VER-2VIKING-PJT BEST BASIC M/ROOM VER-2

6170JB2012A TRANSFORMER,SMPS[COIL]2 DL-PJT 2.9MH/20W

MAKER

SAM IL YEON-HOYEON-HO

DOOSANDOOSAN

SAM IL, SMC

TMP87PM41N 64P SDIP ST OTP VIKING-PJT BEST 1BCMDEFN

6920JB2005B RELAY G5JS-1A-NT OMRON 250VAC 16A 12VDC 1A NO VENTING 3 6920JB2005C RELAY DH1U 11 DEC 250VAC 16A 12VDC 1A VENTING

6920JB2005B 6920000001A

6920JB2005C RELAYRELAYRELAY

G5JS-1A-NT OMRON 250VAC 16A 12VDC 1A NO VENTING 3ALE15B12 MATSUSHITA 250VAC 16A 12VDC 1A NO VENTING

DH1U 11 DEC 250VAC 16A 12VDC 1A VENTING

6920JB2004D

6920JB2005B 6920JB2005C

6920000001A

RELAYRELAYRELAYRELAY

VARISTORD1,2,9-12

RY5OSC1VA1

RY3(H/BAR)

RY2

RY2(EXPORT)

RY4

RY4(EXPORT)

VA1


38

39

40

43

0IZZJB2058U IC,DRAWING8 0IZZJB2058T IC,DRAWING TMP87PM41N 64P SDIP ST OTP VIKING-PJT BEST GPQR8

RELAY 6920JB2004E21NAIS

OMRON

DAIICHI

DAIICHIOMRONMATSUSHITA

DAIICHIOMRONMATSUSHITADAIICHI

OMRON

OMRONG5NB-1A-E(CHINA) OMRON 250VAC 5A 12VDC 1A NO VENTINGRELAY 6920JB2004E18

W

Qty

0CE226EK638

0CE108YH610

0CE108YJ618

0CE227BF638

0CE227BH638

0CE106EK638

0CE105BK638

330NF 0 275V 20% BULK M/PP NI

LU 25V-680UF M (13*20) F/C5680UF YXG 25V 20% FL BULK

(22UF KMG 50V 20% FM5 TP 5(RG/YXA/SM))

(1000UF RX 25V 20% BULK FL(KXL/YXG/LU)

(1000UF RX 35V 0.2 TP 5 FL(KXL/YXG/LU))

(220UF KME TYPE 16V 20% FM5 TP 5(RG/YXA/SM))

(220UF KME,RG 25V 20% FM5 TP 5(YXA/SM))


(1UF KME,RG,YX 50V 0.2 FM5 TP 5(YXA/SM))

0CF22408670

0CK22102510

6102JB8001B6102JB8003A

0IZZJB2066E IC,DRAWING TMP87PM41N 64P SDIP ST OTP GR-00 TWIN H/BAR K/S

30 0DD400409AC DIODE,RECTIFIERS

RUBYCON

SAMWHA

DELTA,PYUNGCHANG

SAMWHA

SHINDENGEN

SANKEN

SAMKEN

DELTA

MURATASAM WHA

G-LUXON(MTI)

SHINDENGEN

SHINDENGEN

RUBYCON,SAMWHA

DELTA,PYUNGCHANG

SAM WHA

DELTA,PYUNGCHANG

CE1(105)

CE6,9,12,13(85)

CE5(85)

CE7,8(105)

CE3(105)

CE4(105)

CE2(105)

BD1D5,6,8

CE1(105)

D3

D4

CE3(105)

D3

D4

CE3(105)

D13D7

68UF MXC 400V 20% BULK SNAP IN

D3SBA60 BK SHINDENGEN 600V 4ARECT1N4004 TP

CSTLS4M00G53-A0 MURATA 4.00MHZ +/- 0.5% TA 15PFSVC621D-14A SAMWHA UL/VDE BK 620V

FR107 TP DELTA DO41 1000V 1A 3RL3 SANKEN BK NON 350V 3.5A 80A 50NSEC 0.1MA

RL3 SANKEN BK NON 350V 3.5A 80A 50NSEC 0.1MA

ALZ12B12 NAIS 250VAC 16A 12VDC 1C NO VENTING

47UF HE 450V 20% BULK SNAP IN

S3L40 SHINDENGEN BK AX14 400V 1.8A 60A 50NSEC 10UA

RECT1N4004 TP

DH1U 11 DEC 250VAC 16A 12VDC 1A VENTINGG5JS-1A-NT OMRON 250VAC 16A 12VDC 1A NO VENTING 3ALE15B12 MATSUSHITA 250VAC 16A 12VDC 1A NO VENTINGDH12D1-O-Q (JAPAN) DEC 250VAC 10A 12VDC 1A

SVC271D-14A SAMWHA UL/CSA/VDE TP

G5NB-1A-E(CHINA) OMRON 250VAC 5A 12VDC 1A NO VENTING

(KLT/MXC/HW)

(TVR14621, INR14D621)(TVR14271, INR14D271)

(KLT/HE/HW)

RECT1N4004 TP

S3L40 SHINDENGEN BK AX14 400V 1.8A 60A 50NSEC 10UA

0ISTL00066A IC,KEC ULN2003A TOSHIBA 16PINSOP TAPPING NPN TRARRAY

0CF4731Y470

1MOHM 1/8 W 5% 2012 R/TP

4.7K OHM 1/4 W 5% TA5210K OHM 1/4 W 5% TA52

10KOHM 1/8 W 5% 2012 R/TP2K OHM 1 / 8 W 5% 2012 R/TP

4.7K OHM 1/8 W 5% 2012 R/TP

1.8K OHM 1/4 W 5.00% TA521K OHM 1/8 W 5% 2012 R/TP

0.56 OHM 1 W 5% TA52

1NF 2012 50V 80%,-20% R/TP X7R0.00047UF 2012 50V 80%,-20% R/TP X7R330K OHM 1 W 5% TA52560K OHM 1/2 W 5% TA5256K OHM 2 W 5.00% F206.8K OHM 1/4 W 5.00% TA52120 OHM 1/4 W 5% TA52680 OHM 1/4 W 5.00% TA52

0 OHM 1/8 W 5% 2012 R/TP

1 OHM 1 W 5% TA52

22NF 2012 50V 80%,-20% R/TP X7R

220P 2KV K B S

100NF 2012 50V 80%,-20% R/TP F(Y5V)22NF 2012 50V 80%,-20% R/TP X7R

220NF 2012 50V 80%,-20% F(Y5V) R/TP

220NF 0 275V 20% BULK M/PP NIMPX 275V-0.33UF M F/C22.5

MPX 275V-0.22UF M F/C22.5

DCH 2KV-220PF K Y5P(B) F/C10

0.047UF D 630V 0.05 BULK M/PP NI

PILKOR

PILKOREUROPTRONIC(MTI)

EUROPTRONIC(MTI)PILKOR

8 0IZZJB2066J IC,DRAWING TMP87PM41N 64P SDIP ST OTP GR-00 VIKING-BEST SAA

MATSUSHITA

SANKEN

TOSHIBA

KEC

KEC

KECKEC

NEC

AMPAMP

AMP

OMRONDAIICHI

TOSHIBATOSHIBA

TOSHIBA

CHANGJIANGCHANGJIANG

TOSHIBA

TOSHIBAIC2

IC6

IC7IC8

IC4IC5

IC3

CON5CON6

CON4

REMARK

TRANSCON2CON3

T=1.6T=1.6

TRANS

RY1,6

IC1IC1

IC1IC1

LEDOM BHI 370 2C -RG

1

-

1

1

1

-

1

1

-

-

-

2

-

1

11

1

-

-

1

1

-

1

1

-

1

-

1

1

1

1

-

-

11

-

-

1

-

-

1

-

1

2

1

1

1

-

1

1

1

-

1

1

1

1

6

-

-1

1

1

-

1

-

1

3

1

1

1

1

1

1

-

1

1

4

2

-

1

-

6

1

1

1

3

1

-

1

1

1

1

11

1

-

1

-

-

1

4

1

2

1

1

1

61

91

-

1

11

11

9

-

-1

1

3

1

11

2

1

91

9

16

-

11

11

11

1

1

21

39

9

11

-1

1

-

P/NO

LEDOM 37 02B - R G

RUBYCON/G-LUXON

RUBYCON/G-LUXON

RUBYCON/G-LUXON

RUBYCON/G-LUXON

RUBYCON/G-LUXON

RUBYCON/G-LUXON

EXPLATION FOR MICOM CIRCUIT 3-1．Parts List

24

RESISTOR,FIXED CARBON FILMRESISTOR,FIXED CARBON FILM

FILTER(CIRC),EMCFUSE,SLOW BLOW

FILTER(CIRC),EMCFILTER(CIRC),EMC

FUSE ASSEMBLY

RESISTOR,FIXED CARBON FILMRESISTOR,FIXED CARBON FILMRESISTOR,FIXED CARBON FILM

RESISTOR,FIXED CARBON FILMRESISTOR,FIXED CARBON FILMRESISTOR,FIXED CARBON FILMRESISTOR,FIXED METAL FILMRESISTOR,FIXED METAL FILMRESISTOR,FIXED METAL FILMRESISTOR,FIXED METAL FILMRESISTOR,FIXED METAL FILMRESISTOR,FIXED CARBON FILMTRANSISTOR,BIPOLARS

TRANSISTOR,BIPOLARS

INDUCTOR,RADIAL LEAD


SCREW TAP TITE(S),BINDING HEADSOLDER(ROSIN WIRE) RS0SOLDER,SOLDERING

RESISTOR,FIXED CARBON FILMRESISTOR,FIXED CARBON FILMRESISTOR,FIXED CARBON FILM

RESISTOR,FIXED CARBON FILM

76

0TR106009AF

0DZRM00188A

1SBF0302418

9495

939291

FLUXDIODE,ZENERS

83

JUMP WIRE 6854B50001A

3J02447C 6901JB8001A

4920JB3007A 0Q01030F

6200JB8007X 0LR1001M4F0

6200JB8009B

90898887868584

FUSE,DRAWING

HEAT SINK

6854B50001A 6854B50001A 6854B50001A

0FS5001B502 6600RRT001W

6210JB8001A

828180797877

JUMP WIREJUMP WIREJUMP WIRE

SWITCH,TACT

0RD8201G609

69

0RN2612G409

0RD3300G609 0TRKE00008A 0TR319809AA

0RN2401G409 0RN1002G409

0RN9101G409

757473727170

TRANSISTOR

0RD3901G609 0RD1501H609 0RN1622G409

0RD1001G609 0RD2001G609 0RD2001G609

68

67 0RD1001G609 0RD1801G609 6854B50001A

0RD2401G609

0RD1002G609 0RD1202G609

0RD1201G609JUMP WIRE

6854B50001A JUMP WIRE

8.2K OHM 1/4 W 5% TA52

1K OHM 1/4 W 5% TA523.9K OHM 1/4 W 5% TA521.5K OHM 1/2 W 5.00% TA5216.2K OHM 1/4 W 1.00% TA5226.1K OHM 1/4 W 1.00% TA52

2K OHM 1/4 W 5% TA522K OHM 1/4 W 5% TA52

1K OHM 1/4 W 5% TA521.8K OHM 1/4 W 5% TA520.6MM (52)MM TP TAPING SN

10K OHM 1/4 W 5% TA52

2.4K OHM 1/4 W 5% TA5212K OHM 1/4 W 5% TA52

1.2K OHM 1/4 W 5% TA52

SMART,CHOHYANG

SMART,CHOHYANG

SMART,CHOHYANG


SMART,CHOHYANG

KEC



SMART,CHOHYANG


SMART,CHOHYANG

SMART,CHOHYANGSMART,CHOHYANGDAE A LEAD

DAE A LEAD

RCR1R25,27,28,36,43,45-48

RD1,RR1,RR2

R34,41Q2,4

RF3RT1

RF2

RF1R35,42R32,39R22R29,30

(R)J1

(R)J2

RCR1RCR1(R)J2

(R)J1(R)J2

(R)J1

0TR106009AC

CAPACITOR,FIXED CERAMIC(HIGH DIELECTRI) 0RH1002L622


ROHM

TRANSISTOR,BIPOLARSKEC

0ITO777400A




0CK223DK96A

IC,DRAWING

0RD2001G609


6630JB8007N

SMART,CHOHYANG

RESISTOR,FIXED CARBON FILMSMART,CHOHYANG 0RD4701G609


0RD1002G609

0RN2612G409


((MAGIC-ROOM))

MURATA

RESISTOR,FIXED METAL FILMSMART,CHOHYANG

KEC

0RH0000L622


0TR106009AC


ROHM

TRANSISTOR,BIPOLARSSMART,CHOHYANG

107

103

108

101

96

105

98

104

10099

106

97

JUMP WIRE 6854B50001A 6854B50001A JUMP WIRE

Q1

(IC2)(IC2)

J03-21,23-40,41

JF1,JF2

FUSE1

(IC2)TAB1,2FUSE HOLDER

L3,4L2L1

OP1JCR1-JCR4

SW1FUSE2FB1

Q3,5

JP1JP2

110111112113114115116117

KRC106M KEC TP TO92M 50V 100MA

5000MA 250 V 5.2X20 LD/GL UL / CSATHVV502GAA POSTECH 12V DC 50MA TAPING0.6MM (52)MM TP TAPING SN

CH940050 TNC BK -UV11-05320 TNC BK 0.5A 320MH1000UH 20% R 6X12.5 BULK

BFS3510A0 SAMWHA 52 -

330 OHM 1/4 W 5.00% TA52KEC KTB1151 BK TO126 60V 5AKTC3198-TP-Y (KTC1815)KEC

9.1K OHM 1/4 W 1.00% TA522.4K OHM 1/4 W 1.00% TA5210K OHM 1/4 W 1.00% TA52

0.6MM (52)MM TP TAPING SN0.6MM (52)MM TP TAPING SN0.6MM (52)MM TP TAPING SN0.6MM (52)MM TP TAPING SN0.6MM (52)MM TP TAPING SN

67

68

69

67

68

69

0CE105BK6380CE105BK6380CE106EK6380CE106EK638

KOKIROHM

HISUNG

TAE SUNG-

SAM JU

TAE SUNG

SAM JUKET

AMPTOSHIBA

SS0000008AASSWZU-L05AA7245ZB0004A

0.6MM (52)MM TP TAPING SN

KEC

DAE A LEAD

TNCTNC

TNC

DAE A LEADDAE A LEADDAE A LEAD

SAM JUPOSTECH

SAM WHA

KEC

DAE A LEADDAE A LEAD



38

-

4

1

-

1

1

1

2

12

2

-

1

38

1

-

12

1

4-

1

--

212

IC,DRAWING EAN354895

23.3*17*25 DRIVE IC STR R-S64,65,73 2PIN 1-SCREW 3MM

RLZ ROHM R/TP LLDS(LL-34) 500MW 5.6V 20MA .PF

+ D3.0 L8.0 MSWR3/FZY

15A 250V - EFKORE-PJT N/SGP881191-2 HAN KUK DAN JA NA NA NA

KRA106M (KRA2206) KEC TP TO92M 50V 100MA

4.7K OHM 1/4 W 5% TA52

0 OHM 1/8 W 5% 2012 R/TP

2K OHM 1/4 W 5% TA52

1746062-1 AMP 14P 2.5MM

KRA106M (KRA2206) KEC TP TO92M 50V 100MA

22NF 2012 50V 80%,-20% R/TP X7R

26.1K OHM 1/4 W 1.00% TA52

TA7774AP 16,SDIP BK DRIVE,IC STEPPING MOTOR

10KOHM 1/8 W 5% 2012 R/TP

10K OHM 1/4 W 5% TA52

(1UF KME,RG,YX 50V 0.2 FM5 TP 5(YXA/SM))


SV-PBF-06 KSK 12.5 WT% 0.815+-0.003LFM-38, SN 3.0AG-0.5CU% 3.0MMSR-34 PB FREE, LFM-48

TMP87PM41N 64P SDIP ST OTP TIANANMEN-PJT BEST GPQR TOSHIBA

ZD1--

Q6-8

CE14(85)

RR3

R13

CON7

CE15(85)

R52,53

Q9

R54

R55

IC9

R56

CC22,23

IC1

-

-

-

0.025

-

10.0015

0.003

-

-

--

-

-

-

-

-

1

-

0.00150.025

-

-

0.003

-

-

-

-

--

-

-

-

-

11 118

-

1-

1

1

1

1

1

1

9

2

-

-

2

2

2

2

11

3

1

1

2

-

-1

1--

--

1

-

2

9

-

2

21

1

2

1

1

1

22

1

1

1

1

3

1

V WORK

DESCRIPTIONNoQty

NOITACILPP A

SPEC MAKER

W

Qty REMARK

LEDOM BHI 370 2C -R G

P/NO

LEDOM 3702B -R G

RUBYCON/G-LUXON

RUBYCON/G-LUXON

EXPLATION FOR MICOM CIRCUIT 3-2．Parts List

CIRCUIT

The circuit has been only applied to voltage except 220v.

- 52 -

1. TROUBLE SHOOTING

TROUBLE DIAGNOSIS

- 27 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

1. Faulty start1) 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 terminalmovement.

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

Check both terminals ofO.L.P.If power conducts : OK.If not : NG.

Check the resistance of bothterminals.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 onpower 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 betweenmale terminal.

- Thin female terminal.

Terminal disconnected.

Bad sleeve assembly.

Power cord is disconnected.

Faulty soldering.

Start automatic defrost.Cycle was set at defrost when the refrigeratorwas produced.

Power does not conduct. - Damage.

Bad characteristics. - Initial resistance is big.

Bad connection withcompressor.

Bad terminal connection.

Too loose.Assembly is not possible.

TROUBLE DIAGNOSIS

- 28 -


2. No cooling. 2) Refrigeration system is clogged. Check the cloggedevaporator by heating (assoon as the cracking soundbegins, the evaporator startfreezing)

The evaporator does not coolfrom the beginnig (no evideceof misture attached).The evaporator is the sameas before even heat isapplied.

Moistureclogged.

No electricpower ontherm-ostat.

Weld jointclogged.

Drier cloggeing.

Foreign material clogging.

Residual moisturein the evaporator.

Residual moisture.

Insufficient driercapacity.

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.

Too short time.Low air pressure.Less dry air.

Air Blowing.

Leave it in the air.

Caps are missed.

Short pipe insert.

Pipe gaps.

Too much solder.

Too large.Damaged pipes.

Not dried in the compressor.Elapsed more than 6 months after dryingCaps 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.Too short.Impossible moistureconfirmation.Low air pressure.

Dry drier - Drier temperature.

Leave it in the air.

The capillary tube inserted depth. - Too much.

Capillary tube melts. - Over heat.

Clogged with foreign materials.

Reduced cross section by cutting. - Squeezed.

Desiccant powder.Weld oxides.Drier angle.

Check on packagecondition.Good storage afterfinishing.

TROUBLE DIAGNOSIS

-29 -


3. Refrigeration is weak.

Heater Sheath

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 materialspenetration.

Cap drain is not disconnected.

Inject through thehole.Seal with drain.

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

Parts disconnected.

Wire is cut.- Lead wire.- Heating wire.- Contact pointbetween heating andelectric wire.

Dent by fine evaporator.Heating wire is corroded- Water penetration.Bad terminal connection.

Check visually.

Check terminal Conduction: OK.No conduction: NG.If wire is not cut, refer toresistance.P=PowerV=VoltageR=Resistance

V2P= —

R

V2R= —

P

- 30 -

TROUBLE DIAGNOSIS



3) Cooling air leak.

4) No cooling air circulation.

Residualfrost.

No automatic defrosting.

Defrost does not return.

Bad gasket adhestion

Door sag.

Faulty fan motor.

Weak heat from heater.

Too 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.

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 doorattachment.Door liner(dimension).Contraction innerliner.Misalignment.Bad terminalconnection.P/U liquid leak.

Faults.

Refrigerator and freezer switch reversed.Button is not pressed.

Check the fan motorconduction: OK.No conduction: NG.

TROUBLE DIAGNOSIS

-31 -



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 airdischarge.

Fan is constrained.

Insufficientmotor 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 afterdisassembly.

Check visually afterdisassembly.

TROUBLE DIAGNOSIS

- 32 -


4. Warmrefrigeratorcompartmenttemperature.

5. No automaticoperation.(faulty contacts.)

6. Dew 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. –– Rubber motor assembly direction(reverse).Door opens but not closes.

Gap around gasket. –– Contraction, distortion, loose, door twisted, corner notfully inserted.

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

Door opensbut not closes.

Gasket gap.

Cool air leakand 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.

Too much food.Hot food.

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

Insufficient closing.Door sag.Food hinders door closing.

Toop table part.Out plate R/L part.

Not fully filled.

Flange gap. –– Not sealed.Gasket gap.

Inspect parts measurementsand check visually.

TROUBLE DIAGNOSIS

- 33 -


6. Dew and ice formation.

7. Sounds

4) Dew on door.Dew on the duct door. - Duct door heater is cut.Dew on the dispense recess.

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

P/U liquid contraction.

Dew on thegasket surface.

5) Water on the floor.Dew 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.Rubber Too hard.seat. Distorted.

Aged.Burnt.

Stopper. Bad Stopper Not fitassembly. (inner

diameterof stopper).

Tilted.Not

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

O.L.P. sound. Chattering sound.Insulation paper vibration.

Capacitor noise. Pipe contacts each other. – Narrow interval.Pipe sound. No vibration damper. Damping rubber-Q.

Damping rubber-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. Too much notch.Broken.

Home Bar heater is cut.

Liquid shortage.Liquid leak.

TROUBLE DIAGNOSIS

- 34 -


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 fancontact.

Unbalance fan sounds.

Motor shaftcontact 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 rubber seat.

Bad torque for assembling motorbracket.

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

Unbalance.

Ice on the fan. –– Air intake (opposite to motorrubber 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 expansionand contraction.

Poor treatment Cord heater.Narrow evaporator interval.

Surface machining conditions.Fan distortion.Misshappen.Burr.

TROUBLE DIAGNOSIS

- 35 -


8. Faulty lamp(freezer andrefrigeratorcompartment).

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. Its own defect.Refrigerator and freezer switch is reversed.Travlel distance.Bad connection.Bad terminal contact.P/U liquid leak..

1) Lead wire is damaged.Wire damage when assembling P.T.C. 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 andnon-conduction parts andcheck with tester. Conduction: NG.Resistance∞: OK.

TROUBLE DIAGNOSIS

- 36 -


10. Structure, appearanceand others.

1) Door foam.Sag.

Noise duringoperation.

Malfunction.

2) Odor.Temperature of refrigeratorcompartment.

Deodorizer.

Food Storage.

Others.

Weak torque ofhinge connection.

Weak gasketadhesion.Fixed tape.

Hinge interference.

Not closed Interference between door liner and inner liner.Refrigeratorcompartment is opened when freezercompartment is closed (faulty stopper).

High. Faulty damper control.Button is set at "weak".Door is open (interference byfood).

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 and not enoughquantity.

Stopper worn out.Bad freezer compartment doorassembly.No stopper.

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

Not well fixed.

2. F

ault

s

2-1.

Po

wer

2-2.

Co

mp

ress

or

TROUBLE DIAGNOSIS

37

Pro

ble

ms

Cau

ses

Ch

ecks

Mea

sure

sR

emar

ks

No

pow

er o

n -

Pow

er c

ord

cut.

- C

heck

the

volta

ge w

ith te

ster

.-R

epla

ce th

e co

mpo

nent

s.

outle

t.-

Fau

lty c

onne

ctor

inse

rtio

n.-

Che

ck v

isua

lly.

-Rec

onne

ct th

e co

nnec

ting

part

s.

- F

aulty

con

nect

ion

betw

een

plug

- C

heck

vis

ually

.-

Rec

onne

ct th

e co

nnec

ting

part

s.

and

adap

ter.

Fus

e bl

ows

out.

- S

hort

circ

uit b

y w

rong

con

nect

ion.

- C

heck

the

fuse

with

test

er-

Fin

d an

d re

mov

e th

e ca

use

of

- R

epla

ce w

ith r

ated

- Lo

w v

olta

ge p

rodu

cts

are

or v

isua

lly.

prob

lem

(ex.

sho

rt, h

igh

volta

ge,

fuse

afte

r co

nfirm

ing

conn

ecte

d to

hig

h vo

ltage

.-

Che

ck th

e in

put v

olt a

re w

ith te

ster

low

vol

tage

).

its s

peci

ficat

ion.

- S

hort

circ

uit b

y in

sect

s.(b

etw

een

pow

er c

ord

and

prod

ucts

).-

Rep

lace

with

rat

ed fu

se.

- E

lect

ricity

leak

age.

- C

heck

the

resi

stan

ce o

f pow

er c

ord

If

fuse

blo

wns

out

- H

igh

volta

ge.

with

test

erf (

if it

is 0

Ω, i

t is

shor

ted)

.fr

eque

ntly

, rec

onfir

m

- S

hort

circ

uit o

f com

pone

nts

the

caus

e an

d pr

even

t.

(tra

ckin

g du

e to

moi

stur

e an

d du

st

pene

trat

ion)

.

Pro

ble

ms

Cau

ses

Ch

ecks

Mea

sure

sR

emar

ks

Com

pres

sor

- F

aulty

PT

C.

- C

heck

the

resi

stan

ce.

- If

resi

stan

ce is

infin

ite, r

epla

ce it

does

not

V

laue

:∞is

def

ectiv

e.w

ith n

ew o

ne.

oper

ate.

- If

it is

not

infin

ite, i

t is

norm

al.

- C

heck

oth

er p

arts

.

- C

ompr

esso

r is

froz

en.

- If

com

pres

sor

asse

mbl

y pa

rts

are

- D

urin

g fo

rced

ope

ratio

n:

norm

al(c

apac

itor,

PT

C, O

LP),

-

Ope

rate

s: C

heck

oth

er p

arts

.

appl

y po

wer

dire

ctly

to th

e -

Not

ope

rate

: Rep

lace

the

froz

en

com

pres

sor

to fo

rce

oper

atio

n.co

mpr

esso

r w

ith n

ew o

ne, w

eld,

evac

uate

, and

rec

harg

e re

frig

eran

t.

OLP

It

sta

rts

as s

oon

as it

is•

Ref

er to

wel

d re

pair

proc

edur

es.

cont

acte

d.

Aux

iliar

y w

indi

ng

Mai

n w

indi

ng

Pow

er

2-3.

Tem

per

atu

re

TROUBLE DIAGNOSIS

-38

Pro

ble

ms

Cau

ses

Ch

ecks

Mea

sure

sR

emar

ks

Hig

h P

oor

cool

air

circ

ulat

ion

due

to fa

ulty

- Lo

ck –

– C

heck

res

ista

nce

with

a

- R

epla

ce fa

n m

otor

.

tem

pera

ture

fan

mot

or.

test

er.

in th

e fr

eeze

r0Ω

: sho

rt.

com

part

men

t.∞

Ω: c

ut.

- R

econ

nect

and

rei

nser

t.

- R

otat

e ro

tor

man

ually

and

che

ck

rota

tion.

- W

ire is

cut

.

- B

ad te

rmin

al c

onta

ct: C

heck

-

Mai

ntai

n cl

eara

nce

and

rem

ove

ice

term

inal

vis

ually

.(R

epai

r an

d/or

rep

lace

shr

oud

if fa

n

- F

an c

onst

rain

t. –

Fan

shr

oud

is c

onst

rain

ed b

y sh

roud

cont

act:

Con

firm

defo

rmat

ion)

.

visu

ally

.

– F

an ic

ing:

Con

firm

vis

ually

.

Fau

lty fa

n m

otor

due

to fa

ulty

doo

r -

Iced

but

ton

(fau

lty)

oper

atio

n:-

Con

firm

icin

g ca

uses

and

rep

air.

switc

h op

erat

ion.

Pre

ss b

utto

n to

che

ck-

Rep

lace

doo

r sw

itch.

- F

aulty

but

ton

pres

sure

and

con

tact

:

Pre

ss b

utto

n to

che

ck o

pera

tion.

- D

oor

cann

ot p

ress

doo

r sw

itch

- D

oor

sag:

fix

door

.

butto

n: C

heck

vis

ually

.-

Doo

r lin

er b

ent:r

epla

ce d

oor

or

atta

ch s

heet

s.

Bad

rad

iatio

n co

nditi

ons

in

- C

heck

the

clea

ranc

e be

twee

n th

e -

Kee

p cl

eara

nce

betw

een

- T

he fa

n m

ay b

e

com

pres

sor

com

part

men

t.re

frig

erat

or a

nd w

all (

50 m

m in

re

frig

erat

or a

nd w

alls

(m

inim

um

brok

en if

cle

anin

g

min

imum

).50

mm

).pe

rfor

ms

whi

le th

e

- C

heck

dus

t on

the

grill

in

- R

emov

e du

st a

nd c

onta

min

ants

re

frig

erat

or is

on.

com

pres

sor

com

part

men

t.fr

om g

rill f

or e

asy

heat

rad

iatio

n.

- C

heck

dus

t on

the

coils

con

dens

er.

- R

emov

e th

e du

st w

ith v

acuu

m

clea

ner

from

the

coils

con

dens

er

whi

le th

e re

frig

erat

or is

off.

2-4.

Co

olin

g

TROUBLE DIAGNOSIS

39

Pro

ble

ms

Cau

ses

Ch

ecks

Mea

sure

sR

emar

ks

Hig

h R

efrig

eran

t lea

k.C

heck

seq

uenc

eW

eld

the

leak

ing

part

, rec

harg

e th

eD

rier

mus

t be

repl

aced

.

tem

pera

ture

1. C

heck

the

wel

ded

part

s of

the

refr

iger

ant.

in th

e fr

eeze

rdr

ier

inle

t and

out

let a

nd d

rier

com

part

men

t.au

xilia

ry in

the

com

pres

sor

com

part

men

t (hi

gh p

ress

ure

side

).

2. C

heck

the

end

of c

ompr

esso

r

seal

ing

pipe

(lo

w p

ress

ure

side

).

3. C

heck

silv

er s

olde

red

part

s.

(Cu

+ F

e / F

e +

Fe)

.

4. C

heck

ben

ding

are

a of

wire

cond

ense

r pi

pe in

com

pres

sor

com

part

men

t (cr

acks

can

happ

en d

urin

g be

ndin

g).

5. C

heck

oth

er p

arts

(co

mpr

esso

r

com

part

men

t and

eva

pora

tors

in

free

zer

com

part

men

t).

Sho

rtag

e of

ref

riger

ant.

Che

ck fr

ost f

orm

atio

n on

the

surf

ace

- F

ind

out t

he le

akin

g ar

ea, r

epai

r,D

rier

mus

t be

repl

aced

.

of e

vapo

rato

r in

the

free

zer

evac

uate

, and

rec

harg

e th

e

com

part

men

t.re

frig

eran

t.

- If

the

fros

t for

ms

even

ly o

n th

e -

No

leak

ing,

rem

ove

the

rem

aini

ng

surf

ace,

it is

OK

.re

frig

eran

t, an

d re

char

ge n

ew

- If

it do

es n

ot, i

t is

not g

ood.

refr

iger

ant.

TROUBLE DIAGNOSIS

40

Pro

ble

ms

Cau

ses

Ch

ecks

Mea

sure

sR

emar

ks

Hig

h C

ycle

pip

e is

clo

gged

.C

heck

seq

uenc

e.-

Hea

t up

com

pres

sor

disc

harg

ing

Dire

r m

ust b

e re

plac

ed.

tem

pera

ture

in1.

Che

ck te

mpe

ratu

re o

f con

dens

erw

eld

join

ts w

ith to

uch,

dis

conn

ect

the

free

zer

man

ually

.th

e pi

pes,

and

che

ck th

e cl

oggi

ng.

com

part

men

t.If

it is

war

m, i

t is

OK

.R

emov

e th

e ca

uses

of c

logg

ing,

If it

is n

ot, c

ompr

esso

r di

scha

rgin

gw

eld,

eva

cuat

e, a

nd r

echa

rge

join

ts m

ight

be

clog

ged.

the

refr

iger

ant.

2. M

anua

lly c

heck

whe

ther

hot

line

- If

it's

war

m, i

t's O

K. I

f it's

not

,

pipe

is w

arm

.co

nden

ser

disc

harg

ing

line

wel

d

If it

is w

arm

, it's

OK

.jo

ints

mig

ht b

e cl

ogge

d.

If it

is n

ot, c

onde

nser

out

let w

eld

Dis

conn

ect w

ith to

rch,

rem

ove

the

join

ts m

ight

be

colg

ged.

caus

es, e

vacu

ate,

and

rec

harg

e

seal

ref

riger

ant.

Leak

at l

oop

pipe

wel

d jo

int

Che

ck s

eque

nce.

Rep

lace

the

com

pres

sor,

wel

d,

Drie

r m

ust b

e re

plac

ed.

(dis

char

ge)

in c

ompr

esso

r.1.

Man

ually

che

ck w

heth

er

evac

uate

, and

rec

harg

e re

frig

eran

t.

cond

ense

r is

war

m, I

t is

not w

arm

and

the

fros

t for

ms

part

ly o

n th

e

evap

orat

or in

the

free

zer

com

part

men

t.

Fau

lty c

oolin

g fa

n in

the

com

pres

sor

Che

ck s

eque

nce.

- R

epla

ce if

mot

or d

oes

not o

pera

te.

com

part

men

t.1.

Che

ck c

oolin

g fa

n op

erat

ion.

- If

fan

is d

isco

nnec

ted,

che

ck fa

n

2. C

heck

that

coo

ling

fan

is

dam

age

and

reas

sem

ble

it.

disc

onne

cted

from

the

mot

or.

R

efer

to fa

n m

otor

dis

asse

mbl

y

and

asse

mbl

y se

quen

ce.

2-5.

Def

rost

ing

fai

lure

TROUBLE DIAGNOSIS

41

Pro

ble

ms

Cau

ses

Ch

ecks

Mea

sure

sR

emar

ks

No

defr

ostin

g.H

eate

r do

es n

ot g

ener

ate

heat

as

1. C

heck

the

resi

stan

ce o

f hea

ter.

Hea

ting

wire

is s

hort

and

wire

is c

ut.

Sea

l the

lead

wire

with

the

heat

ing

wire

is c

ut o

r th

e ci

rcui

t0Ω

: Sho

rt. ∞

Ω: C

ut.

• P

arts

rep

lace

men

t: R

efer

to p

arts

insu

latio

n ta

pe a

nd h

eat

is s

hort

ed.

Ten

s to

thou

sand

s Ω

: OK

.ex

plan

atio

ns.

cont

ract

ion

tube

if th

e cu

t

1) H

eatin

g w

ire is

dam

aged

whe

n 2.

Che

ck th

e re

sist

ance

bet

wee

n le

ad w

ire is

acc

essi

ble

to

inse

rtin

g in

to th

e ev

apor

ator

.ho

usin

g te

rmin

al a

nd h

eate

rre

pair.

2) L

ead

wire

of h

eate

r is

cut

.su

rfac

e.

3) H

eatin

g w

ire a

t lea

d w

ire c

onta

cts

0Ω: S

hort

. ∞Ω

: Cut

.

is c

ut.

Ten

s to

thou

sand

s Ω

: Sho

rt.

Suc

king

duc

t and

dis

char

ging

hol

e 1.

Con

firm

fore

ign

mat

eria

ls. I

n ca

se1)

Pus

h ou

t im

purit

ies

by in

sert

ing

are

clog

ged:

of ic

e, in

sert

the

copp

er li

ne

copp

er w

ire.(

Tur

n of

f mor

e th

an

1. Im

purit

ies.

thro

ugh

the

hole

to c

heck

.3h

ours

and

pou

r in

hot

wat

er if

2. Ic

e.2.

Put

hot

wat

er in

to th

e dr

ain

fros

t is

seve

re.)

(che

ck d

rain

s ou

tsid

e).

2) P

ut in

hot

wat

er to

mel

t dow

n fr

ost.

3) C

heck

the

wat

er o

utle

t.

4) P

ush

the

heat

er p

late

to s

ucki

ng

duct

man

ually

and

ass

embl

e th

e

disc

onne

cted

par

ts.

Gap

bet

wee

n S

ucki

ng d

uct a

nd1.

Con

firm

in th

e S

ucki

ng d

uct.

1) T

urn

off t

he p

ower

, con

firm

Hea

ter

plat

e(Ic

e in

the

gap)

.im

purit

ies

and

ice

in th

e ga

p, a

nd

supp

ly h

ot w

ater

unt

il th

e ic

e in

the

gap

mel

ts d

own.

2) P

ush

the

Hea

ter

plat

e to

dra

in

botto

m w

ith h

and

and

asse

mbl

e

the

disc

onne

cted

par

ts.

Wro

ng h

eate

r ra

ting

(or

wro

ng

1. C

heck

hea

ter

labe

l.F

aults

:rep

lace

.

asse

mbl

y).

2. C

onfir

m th

e ca

paci

ty a

fter

- H

ow to

rep

lace

: Ref

er to

mai

n pa

rts.

subs

titut

ing

the

resi

stan

ce v

alue

into

the

form

ula.

(V: R

ated

vol

tage

of u

ser c

ount

ry)

(R: R

esis

tanc

e of

test

er[Ω

])

Com

pare

P a

nd la

vel c

apac

ity.

Tole

ranc

e: ±

7%

V2

P=

–– R

TROUBLE DIAGNOSIS

42

Pro

ble

ms

Cau

ses

Ch

ecks

Mea

sure

sR

emar

ks

No

defr

ostin

gM

eltin

g fu

se b

low

s ou

t.-

Che

ck m

eltin

g fu

se w

ith te

ster

. -

Fau

llty

part

s: p

arts

rep

lace

men

t.

1) L

ead

wire

is c

ut.

If 0Ω

: OK

.-

Che

ck w

ire c

olor

whe

n m

aeas

urin

g

2) B

ad s

olde

ring.

If ∞

Ω: w

ire is

cut

.re

sist

ance

with

a te

ster

.

Ice

in th

e S

ucki

ng d

uct.

1. C

heck

the

inne

r du

ct w

ith m

irror

.1)

Tur

n po

wer

off.

1) Ic

ing

by fo

reig

n m

ater

ials

in th

e2)

Rai

se th

e fr

ont s

ide(

door

sid

e),

duct

.su

ppor

t the

fron

t sid

e le

gs, a

nd le

t

2) Ic

ing

by c

ool a

ir in

flow

thro

ugh

the

ice

mel

t nat

ural

ly. (

If po

wer

is

the

gap

of h

eate

r pl

ate.

on, m

elt t

he fr

ost b

y fo

rced

3) Ic

ing

by th

e ga

p of

hea

ter

plat

e.de

fros

ting.

)

2. C

heck

by

inse

rtin

g so

ft co

pper

3)

Rea

ssem

ble

the

heat

er p

late

.

wire

into

the

duct

(so

ft an

d th

in

copp

er n

ot to

impa

ir he

atin

g w

ire).

Bad

coo

l air

inflo

w a

nd d

isch

arge

, 1.

Tur

n on

pow

er, o

pen

or c

lose

the

1) C

heck

the

faul

ty c

onne

ctor

of

and

bad

defr

ostin

g du

e to

faul

tydo

or, c

heck

that

mot

or fa

n ho

usin

g an

d re

asse

mbl

e w

rong

ly

cont

act a

nd in

sert

ion

(bad

con

nect

orop

erat

es (

If it

oper

ates

, mot

or fa

nas

sem

bled

par

ts.

inse

rtio

n in

to h

ousi

ng o

f hea

ter,

is

OK

).2)

If th

e pa

rts

are

very

dam

aged

,

mel

ting,

fuse

and

mot

or fa

n).

2. D

isco

nnec

t par

ts in

the

refr

iger

ator

rem

ove

the

part

s an

d re

plac

e it

com

part

men

t, ch

eck

the

conn

ectio

nw

ith a

new

one

.

arou

nd th

e ho

usin

g vi

sual

ly,

defr

ost,

and

conf

irm h

eat g

ener

atio

n

on th

e he

ater

. Do

not p

ut h

ands

on

the

shea

th h

eate

r.

3. C

heck

the

part

s w

hich

hav

e fa

ults

desc

ribed

in 1

, 2 (

mec

hani

cal

mod

el: d

isco

nnec

t the

rmos

tat

from

the

asse

mbl

y).

2-6.

Icin

g

TROUBLE DIAGNOSIS

refr

iger

ator

-

Clo

gged

inta

ke p

ort i

n th

e (c

heck

dis

char

ge a

nd in

take

por

t -

Sea

ling

on c

onne

ctin

g pa

rts.

rela

ted

part

s if

prob

lem

com

part

men

t.re

frig

erat

or c

ompa

rtm

ent.

are

clog

ged)

.-

Che

ck th

e da

mpe

r an

d re

plac

eis

cau

sed

by fa

ulty

- D

ampe

r ic

ing.

- S

ealin

g is

not

goo

d.-

Che

ck ic

ing

on th

e su

rfac

e of

it

if it

has

defe

cts.

defr

ostin

g.

- P

ipe

icin

g.-

Too

muc

h fo

od is

sto

red

and

clog

sba

ffle

and

cool

air

path

(pi

pe)

afte

r-

Che

ck d

efro

st. (

Afte

r fo

rced

- D

isch

argi

ngth

e di

scha

rge

port

.di

ssem

blin

g th

e co

ntai

ner

box.

defr

ostin

g, c

heck

ice

in th

e

pipe

icin

g.-

Bad

def

rost

ing.

- C

heck

icin

g at

inta

ke p

orts

of

evap

orat

or a

nd p

ipes

.)

free

zer

and

refr

iger

ator

com

part

men

t.

2) F

aulty

doo

r or

ref

riger

ator

- C

heck

gas

ket a

ttach

ed c

ondi

tions

.-

Cor

rect

the

gask

et a

ttach

men

t-

Rep

lace

men

t sho

uld

com

part

men

t.-

Che

ck d

oor

asse

mbl

y co

nditi

ons.

cond

ition

s an

d re

plac

e it.

be d

one

whe

n it

- F

aulty

gas

ket.

- D

oor

asse

mbl

y an

d re

plac

emen

t.ca

nnot

be

repa

ired.

- F

aulty

ass

embl

y.

3) O

verc

oolin

g in

the

refr

iger

ator

- C

heck

ref

riger

ator

com

part

men

t-

Rep

lace

faul

ty p

arts

.

com

part

men

t.is

ove

rcoo

led

(whe

n bu

tton

- F

aulty

dam

per

in th

e re

frig

erat

orpr

esse

d on

"w

eak"

).

com

part

men

t.-

Che

ck p

arts

are

faul

ty.

- F

aulty

MIC

OM

(fa

ulty

sen

sor)

4) B

ad d

efro

stin

g-

Che

ck fr

ost o

n th

e ev

apor

ator

- C

heck

par

ts r

elat

ed to

def

rost

ing.

- M

oist

ure

cann

ot fr

ost

- H

eate

r w

ire is

cut

.af

ter

diss

embl

ing

shro

ud a

nd fa

n-

Che

ck d

efro

stin

g. (

Che

ck ic

e on

the

on th

e ev

apor

ator

but

- D

efec

tive

defr

ost s

enso

r.gr

ille.

evap

orat

or a

nd p

ipe.

)ca

n be

suc

ked

into

the

- D

efro

sing

cyc

le.

- C

heck

ice

on in

take

por

t of f

reez

erre

frig

erat

or, b

eing

and

refr

iger

ator

com

part

men

t.co

nden

sed

and

iced

,

inte

rfer

es w

ith c

ool a

ir

circ

ulat

ion,

and

supp

ress

es s

ublim

atio

n.

5) C

usto

mer

s ar

e n

ot fa

mili

ar w

ith-

Che

ck fo

od in

terf

eres

with

doo

r-

Be

acqu

aint

ed w

ith h

ow to

use

.

this

mac

hine

.cl

osin

g.

- D

oor

open

s.-

Che

ck ic

e on

the

ceili

ngs.

- H

igh

tem

pera

ture

, hig

h m

oist

ure,

and

high

load

.

43

TROUBLE DIAGNOSIS

44 -

Pro

ble

ms

Cau

ses

Ch

ecks

Mea

sure

sR

emar

ks

Ice

in th

e fr

eeze

r 1)

Bad

coo

ling

air

circ

ulat

ion.

- C

heck

food

sto

rage

con

ditio

ns

- B

e ac

quai

nted

with

how

to u

se.

- C

heck

the

part

s re

late

d

com

part

men

t.-

Inta

ke p

ort i

s co

lgge

d in

the

free

zer

visu

ally

.(C

heck

clo

ggin

g at

inta

ke

- C

heck

def

rost

(C

heck

ice

on th

eto

def

rost

ing

if th

e

- S

urfa

ce o

f fan

com

part

men

t.an

d di

scha

rgin

g po

rt o

f coo

ling

air.

)ev

apor

ator

and

pip

es a

fter

forc

edpr

oble

m is

cau

sed

by

grill

e.-

Dis

char

ging

por

t is

Clo

gged

.-

Che

ck fo

od o

ccup

atio

n ra

tio in

de

fros

ting)

.th

e fa

ulty

def

rost

ing.

- W

all o

f fre

ezer

- T

oo m

uch

food

is s

tore

d.vo

lum

e(Le

ss th

an 7

5%).

com

part

men

t.-

Bad

def

rost

ing.

- C

heck

fros

t on

the

evap

orat

or a

fter

- C

ool a

irdi

ssem

blin

g sh

roud

and

fan

grill

e.

disc

harg

ing

port

.-

Che

ck ic

ing

at in

take

por

t of

- B

aske

t(ra

ck)

refr

iger

ator

com

part

men

t.

area

.

- F

ood

surf

ace.

2) B

ad fr

eeze

r co

mpa

rtm

ent d

oor

- C

heck

gas

ket a

ttach

men

t -

Cor

rect

the

gask

et a

ttach

emen

t-

Rep

lace

whe

n it

can

not

- Ic

ing

in th

e-

Fau

lty g

aske

tco

nditi

ons.

cond

ition

s an

d re

plac

e it.

be r

epai

red.

shut

e.-

Fau

lty a

ssem

bly

- C

heck

doo

r as

sem

bly

cond

ition

s.-

Doo

r as

sem

bly

and

repl

acem

ent.

3) O

ver

free

zing

in th

e fr

eeze

r -

Ref

riger

ator

ope

rate

s pu

ll do

wn.

-Rep

lace

def

ectiv

e pa

rts.

com

part

men

t.(C

heck

if it

is o

pera

ted

- F

aulty

MIC

OM

.in

term

itten

tly)

- T

he T

empe

ratu

re o

f fre

ezer

com

part

men

t is

satis

fact

ory,

but

over

free

zing

hap

pens

in th

e

refr

iger

ator

com

part

men

t eve

n

thou

gh th

e no

tch

is s

et a

t "w

eak"

.

4) B

ad d

efro

stin

g.-

Che

ck fr

ost o

n th

e ev

apor

ator

afte

r-

Che

ck p

arts

rel

ated

to d

efro

stin

g.

- H

eate

r w

ire is

cut

.di

ssem

blin

g sh

roud

and

gril

le.

- C

heck

def

rost

ing.

(Che

ck ic

e on

the

- F

aulty

def

rost

sen

sor.

- C

heck

ice

on th

e in

take

por

t in

the

evap

orat

or a

nd p

ipes

afte

r fo

rced

- D

efro

stin

g cy

cle

refr

iger

ator

com

part

men

t.de

fros

ting.

)

5) U

ser

is n

ot fa

mili

ar w

ith h

ow to

-

Che

ck fo

od h

olds

doo

r op

en.

- B

e ac

quai

nted

with

how

to u

se.

use.

- C

heck

ice

on th

e ic

e tr

ay.

- D

oor

open

s.

- H

igh

moi

stur

e fo

od(w

ater

) is

sto

red.

2-7.

So

un

d

TROUBLE DIAGNOSIS

- 45

Pro

ble

ms

Cau

ses

Ch

ecks

Mea

sure

sR

emar

ks

"Whi

zz"

soun

d1.

Lou

d so

und

of c

ompr

esso

r 1.

1 C

heck

the

leve

l of t

he

1) M

aint

ain

horiz

onta

l lev

el.

oper

atio

n.re

frig

erat

or.

2) R

epla

ce r

ubbe

r an

d se

at if

they

1.2

Che

ck th

e ru

bber

sea

t ar

e sa

gged

and

age

d.

cond

ition

s (s

aggi

ng a

nd a

ging

).3)

Inse

rt r

ubbe

r w

here

han

d co

ntac

t

redu

ces

nois

e in

the

pipe

.

2. P

ipes

res

onat

sou

nd w

hich

is

2.1

Che

ck th

e le

vel o

f pip

es4)

Avo

id p

ipe

inte

rfer

ence

.

conn

ecte

d to

the

com

pres

sor.

conn

ecte

d to

the

com

pres

sor

5) R

epla

ce d

efec

tive

fan

and

fan

and

thei

r in

terf

eren

ce.

mot

or.

2.2

Che

ck r

ubbe

r in

sert

ing

6) A

djus

t fan

to b

e in

the

cent

er o

f

cond

ition

s in

pip

es.

bell

mou

th o

f the

fan

guid

e.

2.3

Tou

ch p

ipes

with

han

ds o

r sc

rew

7) L

eve

a cl

eara

nce

betw

een

-driv

er (

chec

k th

e ch

ange

of

inte

rfer

ing

part

s an

d se

al g

aps

in

soun

d).

the

stru

ctur

es.

8) R

eass

embl

e th

e pa

rts

whi

ch m

ake

3. F

an o

pera

tion

soun

d in

the

free

zer

3.1

Che

ck fa

n in

sert

ion

dept

h an

d so

und.

com

part

men

t.bl

ade

dam

age.

9) L

eave

a c

lear

ance

if e

vapo

rato

r

3.2

Che

ck th

e in

terf

eren

ce w

ith

pipe

s an

d su

ctio

n pi

pe to

uch

stru

ctur

es.

free

zer

shro

ud.

3.3

Che

ck fa

n m

otor

.

3.4

Che

ck fa

n m

otor

rub

ber

inse

rtio

n

and

agin

g co

nditi

ons.

4. F

an o

pera

tion

soun

d in

the

4.1

Sam

e as

fan

conf

irmat

ion

in th

e

com

pres

sor

com

part

men

t.re

frig

erat

or.

4.2

Che

ck d

rip tr

ay le

g in

sert

ion.

4.3

Che

ck th

e sc

rew

fast

enin

g

cond

ition

s at

con

dens

er a

nd

drip

tray

.

TROUBLE DIAGNOSIS

-46

Pro

ble

ms

Cau

ses

Ch

ecks

Mea

sure

sR

emar

ks

Vib

ratio

n so

und.

1. V

ibra

tion

of s

helv

es a

nd fo

ods

in1-

1. R

emov

e an

d re

plac

e th

e

1) R

eass

embl

e th

e vi

brat

ing

part

s

("C

luck

")th

e re

frig

erat

or.

shel

ves

in th

e re

frig

erat

oran

d in

sert

foam

or

cush

ion

whe

re

2. P

ipes

inte

rfer

ence

and

cap

illar

y1-

2. C

heck

ligh

t foo

d an

d co

ntai

ner

vibr

atio

n is

sev

ere.

tube

touc

hing

in th

e co

mpr

esso

r.on

the

shel

ves.

2) L

eave

a c

lear

ance

whe

re p

arts

com

part

men

t.2-

1. T

ouch

pip

es in

the

com

pres

sore

in

terf

ere

with

eac

h ot

her.

3. C

ompr

esso

r st

oppe

r vi

brat

ion.

com

part

men

t with

han

ds.

3) R

educ

e vi

brat

ion

with

rub

ber

4. M

ovin

g w

heel

vib

ratio

n.2-

2 C

heck

cap

illar

y tu

be to

uche

s an

d re

stra

iner

if it

is s

ever

e.

5. O

ther

str

uctu

re a

nd p

arts

co

ver

back

.(e

spec

ially

, com

pres

sor

and

pipe

).

vibr

atio

n.3-

1 C

heck

com

pres

sor

stop

per

4) R

epla

ce c

ompr

esso

r st

oppe

r if

it

vibr

atio

n.vi

btat

es s

ever

ely.

4-1

Che

ck v

ibra

tion

of fr

ont a

nd r

ear

mov

ing

whe

els.

5-1

Tou

ch o

ther

str

uctu

res

and

part

s.

Irre

gula

r so

und.

1. It

is c

ause

d by

hea

t exp

ansi

on1-

1 C

heck

tim

e an

d pl

ace

of s

ound

1)

Exp

lain

the

prin

cipl

es o

f ref

riger

atio

n

("C

lick"

).an

d co

ntra

ctio

n of

eva

pora

tor,

sour

ces.

and

that

the

tem

pera

ture

diff

eren

ce

shel

ves,

and

pip

es in

the

betw

een

oper

atio

n an

d de

fros

ting

refr

iger

ator

.ca

n m

ake

soun

ds.

2) If

eva

pora

tor p

ipe

cont

acts

with

oth

er

stru

ctur

es, l

eave

a c

lear

ance

bet

wee

n

them

(fre

ezer

shr

oud

or in

ner c

ase)

.

TROUBLE DIAGNOSIS

-47

Pro

ble

ms

Cau

ses

Ch

ecks

Mea

sure

sR

emar

ks

Sou

nd "

Bur

ping

"It

happ

ens

whe

n re

frig

eran

t exp

ands

- C

heck

the

soun

d of

refri

gera

nt a

t the

- C

heck

the

rest

rain

er a

ttach

ed o

n th

e

(alm

ost t

he s

ame

at th

e en

d of

cap

illar

y tu

be.

initi

al in

stal

latio

n.ev

apor

ator

and

cap

illar

y tu

be w

eld

as a

nim

als

cryi

ng- C

heck

the

soun

d w

hen

the

refri

gera

tor

join

ts a

nd a

ttach

ano

ther

rest

rain

er.

soun

d).

star

ts o

pera

tion

afte

r for

ced

defro

stin

g.- I

f it i

s co

ntin

uous

and

ser

vere

, ins

ert

- Che

ck th

e re

stra

iner

atta

chm

ent

capi

llary

tube

aga

in (d

epth

:15±

3mm

)

cond

ition

s on

the

evap

orat

or a

nd- F

aste

n th

e ca

pilla

ry tu

be to

suc

tion

capi

llary

tube

wel

d jo

ints

.pi

pes

or d

etac

h in

the

com

pres

sor

com

partm

ent.

- Exp

lain

the

prin

cipl

es o

f fre

ezin

g

cycl

es.

Wat

er b

oilin

g or

It ha

ppen

s w

hen

refri

gera

nt p

asse

s- C

heck

the

soun

d w

hen

com

pres

sor i

s- E

xpla

in th

e pr

inci

ples

of f

reez

ing

cycl

es

flow

ing

soun

d.or

ifice

in a

ccum

ulat

or in

tern

al p

ipes

by

turn

ed o

n.an

d re

frige

rant

flow

ing

phen

omen

on b

y

the

pres

sure

diff

eren

ce b

etw

een

- Che

ck th

e so

und

whe

n co

mpr

esso

r is

inte

rnal

pre

ssur

e di

ffere

nce.

cond

ense

r and

eva

pora

tor.

turn

ed o

ff.- I

f sou

nd is

ser

vere

, wra

p th

e

accu

mul

ator

with

foam

and

rest

rain

er.

Sou

nd o

f whi

stle

Whe

n do

or c

lose

s, th

e in

tern

al p

ress

ure

- Che

ck th

e so

und

by o

peni

ng a

nd

- Bro

aden

the

cap

of d

isch

arge

hos

e fo

r

whe

n do

or

of th

e re

frige

rato

r dec

reas

es s

harp

lycl

osin

g th

e re

frige

rato

r or f

reez

er d

oors

.de

frost

ing

in th

e co

mpr

esso

r

clos

es.

belo

w a

tom

osph

ere

and

suck

s ai

r int

oco

mpa

rtmen

t.

the

refri

gera

tor,

mak

ing

the

whi

stle

- S

eal t

he g

ap w

ith s

eala

nt b

etw

een

out

soun

d.an

d in

ner c

ases

of h

inge

in d

oor.

2-8.

Od

or

TROUBLE DIAGNOSIS

-48

Pro

ble

ms

Cau

ses

Ch

ecks

Mea

sure

sR

emar

ks

Foo

d O

dor.

Foo

d (g

arlic

, kim

chi,

etc)

- C

heck

the

food

is n

ot w

rapp

ed.

- D

ry d

eodo

rizer

in th

e sh

iny

and

- C

heck

the

shel

ves

or in

ner

win

dy p

lace

.

wal

l are

sta

ined

with

food

juic

e.-

Sto

re th

e fo

od in

the

clos

ed

- C

heck

the

food

in th

e vi

nyl w

raps

.co

ntai

ner

inst

ead

of v

inyl

wra

ps.

- C

hedk

food

cle

anlin

ess.

- C

lean

the

refr

iger

ator

and

set

butto

n at

"st

rong

".

Pla

stic

Odo

r.O

dors

of m

ixed

food

and

pla

stic

-

Che

ck w

et fo

od is

wra

pped

with

-

Cle

an th

e re

frig

erat

or.

odor

s.pl

astic

bow

l and

bag

.-

Per

suad

e cu

stom

ers

not t

o us

e

- It

happ

ens

in th

e ne

w r

efrig

erat

or.

plas

tic b

ag o

r w

raps

with

wet

food

or o

doro

us fo

ods.

Odo

r fr

om th

eO

dor

from

the

old

deod

oriz

er.

- C

heck

the

deod

oriz

er o

dors

.-

Dry

the

deod

oriz

er w

ith d

ryer

and

*D

eodo

rizer

: op

tion

deod

oriz

er.

then

in th

e sh

iny

and

win

dy p

lace

.

- R

emov

e an

d re

plac

e th

e

deod

oran

ts.

2-9.

Mic

om

TROUBLE DIAGNOSIS

-49

Pro

ble

ms

Sym

pto

mC

ause

sC

hec

ksM

easu

res

Rem

arks

Bad

PC

B

All

disp

lay

Bad

con

nect

ion

Bad

con

nect

orV

isua

l che

ck o

n co

nnec

tor

Rec

onne

ct

elec

tric

pow

er.

LED

S a

re o

ff.be

twee

n M

ain

PC

B

conn

ectio

n fr

om m

ain

conn

ectio

n.co

nnec

tor.

and

disp

lay

circ

uit.

PC

B to

dis

play

PC

B.

Def

ectiv

e P

CB

tran

s.P

CB

Tra

ns w

indi

ng is

C

heck

res

ista

nce

of P

CB

Tra

nsR

epla

ce P

CB

Tra

nsA

pplic

able

to

cut.

inpu

t and

out

put t

erm

inal

s w

ithor

PC

B.

mod

el w

ithou

t

PC

B T

rans

tem

pera

ture

a te

ster

. (If

resi

stan

ce is

infin

ity,

disp

ense

r.

fuse

is b

urnt

out

.tr

ans

win

ding

is c

ut).

Def

ectiv

ePC

B e

lect

ricD

efec

tive

regu

lato

r IC

Che

ck v

olta

ge a

t inp

ut/o

utpu

tR

epla

ce r

egul

ator

.R

efer

to e

lect

ric

circ

uit p

arts

.(7

812,

780

5).

term

inal

s.ci

rcui

t in

circ

uit

expl

anat

ion.

PC

B e

lect

ric te

rmin

alC

heck

fuse

in P

CB

ele

ctric

R

epla

ce P

CB

fuse

.

fuse

is b

urnt

out

.te

rmin

al w

ith a

test

er.

ST

R P

arts

are

C

heck

if S

TR

No.

2 a

nd 3

pin

sR

epla

ce p

arts

.A

pplic

able

to

dam

aged

.ar

e cu

t whe

n po

wer

is o

ff.m

odel

with

disp

ense

r.

Abn

orm

al

Bad

con

nect

ion

Lead

Wire

con

nect

ing

Che

ck L

ead

Wire

term

inal

s R

econ

nect

Lea

d

disp

lay

LED

betw

een

Mai

n P

CB

m

ain

PC

B a

nd d

ispl

ayco

nnec

ting

Mai

n P

CB

and

W

ire a

nd d

irect

ly

oper

atio

nan

d di

spla

y ci

rcui

t.P

CB

is c

ut o

r co

nnec

tor

disp

lay

PC

B w

ith a

test

er.

conn

ect d

efec

tive

term

inal

con

nect

ion

isco

ntac

t ter

min

al to

bad.

Lead

Wire

.

Def

ectiv

e LE

D

Def

ectiv

e LE

D.

Che

ck if

all

LED

s ar

e on

whe

n R

epla

ce d

ispl

ay

Ref

er to

dis

play

mod

ule.

Mai

n P

CB

Tes

t sw

itch

is

PC

B.

circ

uit i

n ci

rcui

t

pres

sed

(or

whe

n bo

th fr

eeze

rex

plan

atio

n.

key

and

pow

er fr

eeze

r ke

y ar

e

pres

sed

at th

e sa

me

time

for

mor

e th

an o

ne s

econ

d.)

TROUBLE DIAGNOSIS

-50

Pro

ble

ms

Sym

pto

mC

ause

sC

hec

ksM

easu

res

Rem

arks

Bad

coo

ling.

Fre

ezer

C

ompr

esso

r do

esC

ompr

esso

r Le

ad W

ireC

heck

com

pres

sor

Lead

Wire

R

econ

nect

Lea

d

tem

pera

ture

isno

t sta

rt.

is c

ut.

with

a te

ster

.W

ire.

high

.D

efec

tive

com

pres

sor

Mea

sure

vol

tage

at P

CB

CO

N1

Rep

lace

rel

ayR

efer

to lo

ad

driv

ing

rela

y.(5

&7)

afte

r pr

essi

ng m

ain

PC

B(R

Y1)

or

PC

B.

driv

ing

circ

uit i

n

test

sw

itch

once

. It i

s O

K if

ci

rcui

t

volta

ge is

nor

mal

.ex

plan

atio

n.

Def

ectiv

e fr

eeze

r D

efec

tive

Fre

ezer

C

heck

res

ista

nce

of fr

eeze

r R

epla

ce fr

eeze

r R

efer

to

sens

or.

sens

or p

arts

.se

nsor

with

a te

ster

.se

nsor

.re

sist

ance

char

acte

ristic

s

tabl

e of

sen

sor

in

circ

uit

Fre

ezer

sen

sor

isC

onfir

m th

e co

lor

of s

enso

r in

R

epai

r m

ain

PC

Bex

plan

atio

n.

subs

titut

ed fo

r ot

her

circ

uits

(m

ain

PC

B s

enso

r se

nsor

hou

sing

sens

or.

hous

ing)

.

Def

ectiv

e fr

eeze

r fa

nF

an m

otor

lead

wire

C

heck

fan

mot

or le

ad w

ire

Rec

onne

ct le

ad

mot

or.

is c

ut.

with

a te

ster

.w

ire.

• D

efec

tive

door

sw

itch

Mea

sure

the

volta

ge b

etw

een

• R

epla

ce d

oor

Ref

er to

load

(fre

ezer

, ref

riger

ator

,P

CB

pow

er b

lue

line

and

fan

switc

h (f

reez

er,

driv

ing

circ

uits

in

hom

e ba

r).

mot

or a

fter

pres

sing

test

sw

itch

refr

iger

ator

and

ci

rcui

t

• D

efec

tive

fan

mot

or.

of M

ain

PC

B. I

f the

vol

tage

is

hom

e ba

r).

expl

anat

ion.

• D

efec

tive

fan

mot

orno

rmal

, it i

s O

K.

• R

epla

ce fa

n m

otor

.

driv

ing

rela

y.

Fau

lty d

efro

st.

Ref

er to

faul

ty d

efro

st it

ems

in tr

oubl

e di

agno

sis

Ref

er to

trou

ble

func

tions

.di

agno

sis

func

tion.

TROUBLE DIAGNOSIS

-51

Pro

ble

ms

Sym

pto

mC

ause

sC

hec

ksM

easu

res

Rem

arks

Bad

coo

ling

Wro

ng

Def

ectiv

e A

C D

ampe

r.C

heck

AC

dam

per

Che

ck if

AC

dam

per

mot

or a

ndR

econ

nect

lead

Ref

riger

ator

mot

or a

nd r

eed

switc

hre

ed s

witc

h le

ad w

ire a

re

wire

.

tem

pera

ture

.an

d le

ad w

ire a

re c

ut.

cut w

ith a

test

er.

Che

ck A

C d

ampe

r R

efer

to A

C d

ampe

r in

par

ts

Rep

lace

AC

dam

per

part

.re

pair

guid

e.or

ref

riger

ator

con

trol

box

Ass

embl

y.

Che

ck A

C d

ampe

r R

efer

to A

C d

ampe

r in

par

tsR

epla

ce r

elay

or

Ref

er to

sin

gle

Mot

or d

rivin

g re

lay

inre

pair

guid

e.P

CB

.m

otor

dam

per

PC

B.

driv

ing

circ

uits

in c

ircui

t

expl

anat

ion.

For

eign

mat

eria

ls in

AC

Che

ck A

C d

ampe

r ba

ffle

Rem

ove

fore

ign

dam

per

baffl

esvi

sual

ly.

mat

eria

ls.

Ice

form

atio

n on

AC

C

heck

if A

C d

ampe

r H

eate

rR

epla

ce A

C d

ampe

r

dam

per

baffl

esw

ire is

cut

with

a te

ster

.or

ref

riger

ator

con

trol

Box

Ass

embl

y.

Def

ectiv

e re

frig

erat

orD

efec

tive

refr

iger

ator

Che

ck th

e re

sist

ance

of

Rep

lace

ref

riger

ator

Ref

er to

sen

sor

sens

orse

nsor

par

ts.

refr

iger

ator

sen

sor

with

a te

ster

.se

nsor

.re

sist

ance

char

acte

ristic

tabl

e in

circ

uit

expl

anat

ion.

Ref

riger

ator

sen

sor

isC

heck

the

sens

or c

olor

in th

e R

epai

r m

ain

PC

B

subs

titut

ed fo

r ot

her

circ

uit.

(mai

n P

CB

sen

sor

sens

or h

ousi

ng.

sens

or.

hous

ing.

)

Def

ectiv

e re

frig

erat

orC

heck

if r

efrig

erat

or s

enso

rF

ix a

gain

the

sens

or a

ssem

bly

is n

ot fi

xed

at c

over

sen

sor

but

refr

iger

ator

sen

sor.

cond

ition

.in

ner

case

vis

ually

.

TROUBLE DIAGNOSIS

52

Pro

ble

ms

Sym

pto

mC

ause

sC

hec

ksM

easu

res

Rem

arks

Bad

def

rost

.D

efro

st is

not

Def

rost

lead

wire

is c

ut.

Che

ck if

def

rost

lead

wire

is c

ut w

ith a

R

econ

nect

Lea

d

wor

king

.te

ster

.W

ire.

Def

ectiv

e de

fros

t driv

ing

rela

y.C

heck

the

volta

ge o

f CO

N2

Rep

lace

rel

ay

Ref

er to

load

with

a te

ster

afte

r pr

essi

ng m

ain

or P

CB

.dr

ivin

g co

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TROUBLE DIAGNOSIS

-53

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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.

TROUBLE DIAGNOSIS

- 54 -

NO. Items Unit Standards Purposes Remarks1 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(N2 pressure: during welding.0.1~0.2 kg/cm2) - Do not apply force to pipes before and

after welding to protect pipe from cracking.

3 N2 sealed parts. Confirm N2 Confirm air leaking To protect - In case of evaporator parts, if it doesn't leak. sounds when moisture noise when removing rubber cap blow

removing rubber penetration. dry air or N2 gas for more than 1 min cap. use the parts.Sound:usableNo sound:not usable

4 Refrigeration Evacuation Min. More than To removeCycle. 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 thesame time formodels above 200

Vacuum EA Use R134a To protect The rubber 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 protectcoupler cxclusive. R12 Refri-

gerant mixing.Outlet R134a exclusive.

(Socket)Plug R134a exclusive

5 Refrigerant weighing. EA Use R134a Do not mix - Do not weight the refrigerant at too hot or exclusively. with R12 too cold an area.(25°C is adequate.)Weighing refrigerant. - Use copper bombe allowance:±5g Socket:2SV Plug: 2PV R134aNote: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 wheneverrepairing refrigeratorcycle 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 by. -The electronic leak detector is very

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

3-2. Summary Of Heavy Repair

TROUBLE DIAGNOSIS

- 55 -

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, N2 gas

- Confirm N2 sealing and packing conditions before use.

Use good one for welding and assembly.

- Weld under nitrogen gas atmosphere.(N2 gas pressure:

0.1-0.2kg/cm2).

- 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:113l/min.

- Weigh and control the allowance of R134a bombe in a R134a exclusive bombe(mass

vacuum conditions to be ±5 g with electronic scales and cylinder), refrigerant(R134a)

charge through compressor inlet manifold gauge, electronic

(Charge while refrigerator operates). scales, punching off flier,

- Weld carefully after inlet pinching. gas welding machine

- Check leak at weld joints. Electronic Leak Detector,

Minute leak: Use electronic leak detector Driver(Ruler).

Big leak: Check visually or fingers.

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.)

Troublediagnosis

Remove refrigerantResiduals

Partsreplacementand welding

Compressorcompartment

and toolsarrangement

Transportationand

installation

Checkrefrigerant leak

and coolingcapacity

Vacuum

Refrigerantcharging and

charginginlet welding

3-4. Practical Work For Heavy Repair

TROUBLE DIAGNOSIS

- 56 -

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/cm2) 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

KEYPOINTINGObserve the sequence forremoval of refrigerant.(If not, compressor oil mayleak.)

KEYPOINTINGWelding without nitrogenblowing produces oxidizedscales inside a pipe, whichaffect on performance andreliability of a product.

KEYPOINTINGBe sure to check theinserted length of capillarytube when it is inserted. (Iftoo much inserted, acapillary tube is clogged bya filter.)

Compressor

Low pressure side

Condenser High pressure side

Drier

Evaporator

ReleaseRefrigentIntake

Suction

1 2 1

2

Evaporator

Drier

High pressure sideCondenserRefrigentIntake

12+3-0

Filter

* Unit : mm

3-3. Precautions During Heavy Repair

TROUBLE DIAGNOSIS

- 57 -

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 leak will happen.)

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/cm2.)

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.

1

2

Compressor

Low pressure side CondenserHigh pressure side

Drier

Evaporator

TROUBLE DIAGNOSIS

- 58 -

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 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 bombe with a vacuum pump.

3) Measure the amount of refrigerant charged.

- Measure the weight of an evacuated bombe with an electronic scale.

- Charge refrigerant into a bombe and measure the weight. Calculate the weight of

refrigerant charged into the bombe by subtracting the weight of an evacuated bombe.

KEYPOINTING- If power is applied

during vacuumdegassing, vacuumdegassing shall bemore effective.

- Operate compressorwhile chargingrefrigerant. (It iseasier and morecertain to do likethis.)

KEYPOINTING- Be sure to charge

the refrigerant ataround 25°C.

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

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

Calculation of amount of refrigerant charged

2 1

3

Compressor

Lowpressure

Condenser

Highpressure

Drier

Evaporator

RedYellow

Blue

VaccumPump

Suction pipe

R134a

Indicate the weight ofan evacuated bombe

3-5. Standard Regulations For Heavy Repair

TROUBLE DIAGNOSIS

- 59 -

Items Precautions

4) Refrigerant Charging

Charge refrigerant while operating a compressor as shown above.

5) Pinch a charging pipe with a pinch-off plier after completion of charging.

6) Braze the end of a pinched charging pipe with copper brazer and take a gas leakage test

on the welded parts.

6. Gas-leakage test * Take a leakage test on the welded or suspicious area with an electronic leakage tester.

7. Pipe arrangement Check each pipe is placed in its original

in each cycle place before closing a cover back-M/C

after completion of work. Particularly

control the size of Joint Drain Pipe

Compressor

Condenser

Drier

Evaporator

Bombe

Rubber

1) Observe the safety precautions for gas handling.

2) Use JIG (or wet towel) in order to prevent electric wires from burning during welding. (In order to prevent insulationbreak and accident.)

3) The inner case shall be melted and insulation material (polyurethane) shall be burnt if not cared during welding innercase parts.

4) The copper pipe shall be oxidized by overheating if not cared during welding.

5) Not allow the aluminum pipes to contact to copper pipes. (In order to prevent corrosion.)

6) Observe that the inserted length of a capillary tube into a drier should be 12 mm.

7) Make sure that the inner diameter should not be distorted while cutting a capillary tube.

8) Be sure that a suction pipe and a filling tube should not be substituted each other during welding. ( High efficiencypump.)

12 mm+3-0

DrierMolecular PipeMolecular

Sieves

+3-0

3-6. Brazing Reference Drawings

PIPE ASSEMBLY JOINT

PIPE ASSEMBLYHOT LINE

(Refrigerator)

PIPE ASSEMBLYHOT LINE(Freezer)

PIPE ASSEMBLYJOINT

CONDENSER ASSEMBLY WIRE

PIPE ASSEMBLY SUCTION

DRIER ASSEMBLYCAPI - TUBE

Copper BrazerCopper(Silver)

Brazer

Silver Brazer

CopperBrazer

Copper BrazerCopper Brazer Coppper Brazer

Silver Brazer

Copper(Silver)Brazer

GC-B207WLQ.CPLQMAG Area: M Asia

TROUBLE DIAGNOSIS

-60

4. HOW TO DEAL WITH CLAIMS

4-1. Sound

TROUBLE DIAGNOSIS

- 61 -

Problems Checks and Measures

"Whizz" sounds Explain general principles of sounds.• All refrigerator when functioning properly have normal operating sound. The

compressor and fan produce sounds.There is a fan in the freezer compartment which blows cool air to freezer andrefrigerator compartments. "Whizz" sounds are heard when the air passesthrough the narrow holes into the freezer and refrigerator compartments.

Cooling Fan sound in the compressor compartment.• There is a fan on the back of the refrigerator, which cools the compressor

compartment. If there is a small space between the refrigerator and the wall, theair circulation sounds may be noticeable.

Noise of Compressor.• This operating sound happens when the compressor compresses the

refrigerant. The compressor rotates at 3600RPM. The sound of compressoroperation becomes louder as the refrigerator capacity increases.

"Click" sounds Explain the principles of temperature change.• The sounds happens when pipes and internal evaporator in the refrigerator

compartment expand and contract as the temperature changes during therefrigerator operation. This sound also happens during defrosting, twice a day,when the ice on the evaporator melts.

"Clunk" sound Explain that it comes from the compressor when the refrigerator starts.• When the refrigerator operates, the piston and motor in the compressor rotate

at 3600RPM. This sound is caused by the vibration of motor and piston whenthey start and finish their operation. This phenomena can be compared with thatof cars. When the car engine ignites and starts to rotate, the loud soundbecomes gradually quiet. When the engine stops, it stops with vibration.

Vibration sound Check the sound whether it comes from the pipes vibration and friction.• Insert rubber or leave a space between pipes to avoid the noise.• Fix the fan blade if the noise is due to the collision of fan and shroud.• Fix the drip tray if it is loosened.

Sound depends on the installation location.• Sound becomes louder if the refrigerator is installed on a wooden floor or near a

wooden wall. Move it to the another location.• If the refrigerator is not leveled properly, a small vibration can make a loud

sound. Please adjust the level of the refrigerator.

TROUBLE DIAGNOSIS

- 62 -


Sounds of water flowing Explain the flow of refrigerant.• When the refrigerator stops, the water flowing sound happens.

This sound happens when the liquid or vapor refrigerant flows from theevaporator to compressor.

"Click" sounds Explain the characteriistics of moving parts.• This noise comes from the MICOM controller's switch on the top of the

refrigerator when it is turned on and off.

Noise of ice maker operation Explain the procedure and principles of ice maker operation.(applicable to model with ice maker). • Automatic ice maker repeats the cycle of water supplying icemaking ice - Noise produced by ice dropping ejection. When water is supplied, the water supply valve in the machine room and hitting ice bank. makes sounds like “Whizz” and water flowing also makes sound. When water

- Noise from motor sounds “Whizz”. freezes to ice, freezing sounds such as “click, click” are heard. When ice isbeing ejected, sounds like “Whizz” produced by a motor to rotate an ice trayand ice dropping and hitting ice bank sounds are also heard.

Noise when supplying water. Explain the principles of water supplied to dispenser.• When the water supply button in the dispenser is pressed, the water supply

valve in the compressor compartment opens and let the water flow to the watertank in the lower part of the refrigerator compartment. The water is dispensedby this pressure. When this happens, motor sound and water flowing sound areheard.

Noise when supplying ice. Explain the principles of ice supply and procedure of crushed ice making in adispenser.• When ice cube button is pressed, ice stored in the ice bank is moved by a Helix

Pusher and dispensed. If crushed ice button is pressed, the cube ice iscrushed. When this happens, ice crushing and hitting ice bank sounds areheard.

4-2. Measures for Symptoms on Temperature

TROUBLE DIAGNOSIS

- 63 -


Refrigeration is weak. Check temperature set in the temperature control knob.• Refrigerator is generally delivered with the button set at “normal use” (MID).

But customer can adjust the temperature set depending on their habit and taste.If you feel the refrigeration is weak, then set the temperature control button at“strong” position. If you adjust the button in the freezer compartment as well, the refrigeration is stronger than adjusting refrigerator only.

The food in the chilled drawer is . The chilled drawer does not freeze food.not frozen but defrosted • Use chilled drawer for storing fresh meat or fish for short periods. For storing for

a long periods or freezing food, use a freezer compartment. It is normal thatfrozen foods thaw above the freezing temperature (in the chilled drawer).

Refrigerator water is not cool. Check the water storage location.• If water is kept in the door rack, please ask to keep it in the refrigerator

compartment shelf. It will then become cooler.

Ice cream softens. Explain the characteristics of ice cream.• The freezing point of ice cream is below -15°C. Therefore ice cream may melt if

it is stored in the door rack.• Store ice cream in a cold place or set the temperature control button of a freezer

at “strong” position.

Refrigeration is too strong. Check the position of temperature control button.• Check if refrigeration is strong in whole area of the refrigerator or partly near the

outlet of the cooling air. If it is strong in whole area, set the control button at“weak”. If it is strong only near the outlet of cool air, keep food (particularly wetand easy to frozen such as bean curd and vegetables) away from the outlet.

Vegetables are frozen. Check the vegetables storage.• If vegetables are stored in the refrigerator shelf or chilled drawer instead of

vegetable drawer, they will be frozen. Set the control button at “weak” if they arealso frozen in the vegetable drawer.

The food stored at inside of Check if food is stored near the outlet of the cooling air. the shelf freezes even the • The temperature at cooling air outlet is always below the freezing point. control button is set at “MID”. Do not store food near the outlet of the cooling air as it block the air circulation.

And do not block the outlet. If the outlet of the cooling air is blocked, therefrigerator compartment will not be cooled.

4-3. Odor and Frost

TROUBLE DIAGNOSIS

- 64 -


Odor in the refrigerator compartment. Explain the basic principles of food odor.• Each food has its own peculiar odor. Therefore it is impossible to prevent or

avoid food odor completely when food is stored in the completely sealedrefrigerator compartment. Deodorizer can absorb some portions of the odor butnot completely. The intensity of odor depends on refrigerator conditions andenvironments.

Check the temperature control button and set at “strong”.• Clean inside of the refrigerator with detergent and remove moisture. Dry inside

the refrigerator by opening the door for about 3 or 4 hours and then set thetemperature control button at “strong”.

Frost in the freezer compartment Explain the basic principles of frost formation.• The main causes for frosting:

- Door was left open.- Air penetration through the gasket- Too frequent door opening. (parties. etc.)- Hot foods are stored before they are cooled down. The temperature of freezer

is -19°C. if temperature is set at “MID”. If hot air comes into the refrigerator,fine frost forms as cold air mixes with hot air. If this happens quite often, muchfrost forms inside of the refrigerator. If the door is left open in Summer, ice mayform inside of the refrigerator.

Frost in ice tray. Explain basic principles of frost formation.• When ice tray with full of water is put into a freezer compartment, the water

evaporates. If cool air fan operates, the moisture attached to the jaw (protrudedpart) of ice mold shall freeze and form frost. If warm water was put into the icemold, the situation will become worse.

4-4. Others

TROUBLE DIAGNOSIS

- 65 -


The refrigerator case is hot. Explain the principles of radiator.• The radiator pipes are installed in the refrigerator case and partition plate

between the refrigerator and the freezer compartment in order to preventcondensation formation. Particularly in summer or after installation ofrefrigerator, it may feel hot but it is normal. If there is no enough space todissipate heat, it can be hotter due to lack of heat radiation. Please install arefrigerator in a well-ventilated place and leave a clearance between refrigeratorand wall:

Small holes in a door liner Explain that the hole is for releasing gas.• A small hole in the door liner is for releasing gas during insulation materials

lining work. With a releasing hole, forming can be easily done .

Electric bills are too much. Check the use conditions.• Too frequent door opening and hot food storing cause the compressor to

operate continuously and hence increase the electric consumption and bills.

Condensation on the inside Explain how to store foodswall of the refrigerator • Condensation forms when refrigerator is installed at damp area, door is compartment and the cover of frequently opened, and wet foods are not stored in the air tight container orproperly vegetable drawer. wrapped. Be sure to store wet foods in the air tight container or in the wrap.

When is the power connected? When should the power be connected ?• You can connect the power right after the installation. But if the refrigerator was

laid flat during transportation for a long period of time and the refrigerant andcompressor oils are mixed up, then this will affect badly the performance of arefrigerator. Be sure to connect the power 2~3 hours after refrigerator isinstalled.

Door does not open properly. Refrigerator compartment door does not open properly.• When the door is open, warm open air comes into the compartment and is mixed up with cool air. This mixed air shall be compressed and increase theinternal pressure when door is closed. This causes the door sticked closely tothe refrigerator in a moment. (If the refrigerator is used for a long time, it willthen open smoothly.)

When the refrigerator compartment door is open and close, the freezercompartment door moves up and down.• When the refrigerator compartment door is open and close, fresh air comes into

the freezer compartment and moves up and down the freezer compartmentdoor.

Door opens too easily.• There is a magnet in the gasket rubber so that it is ok. if door is securely closed

without a gap. It can be open easily if the foods in the refrigerator or freezercompartments hold the door open.

A door does not close properly. • If the rear side of the refrigerator is raised higher than front side, door shall not

be easily closed. Adjust the level of refrigerator with levelling screws.

The front side shouldbe raised a little bit higher

than the rear side.

1. DOOR1) Remove lower cover and remove clip then

disconnect water supply tube in the lower partof freezer door.

• Pull a water supply tube forward while pressing partto disconnect water supply tube as shown belo

Note：If a tube end is deformed or worn out, cut the damaged portion away.

w.

2) Remove a freezer door.(1) Loosen hinge cover screw of freezer door and remove

cover. Disconnect all connecting lines except earthing cord.

(2) Turn hinge lever in arrow A direction until it isloosened and take it out in arrow B direction.

Note : • When disconnecting refrigerator door, turn hingelever counterclockwise.

• If hinge lever or bracket hinge pin is deformedduring assembling freezer and refrigerator doors,fix two screws (Tap Tite Screw, M6: Hinge, L fixingscrew) in the hole of upper hinge.

(3) Disconnect upper hinge from a hinge supporter by grasping the front part of upper hinge and lifting up(Hinge Assembly, U) in arrow direction A and pullforward in arrow B direction. Be careful as the doormay be fallen down.

(4) Lift up the freezer door in arrow direction anddisconnect the door from the lower hinge . Don’t pulla door forward.

Note : • Lift up a freezer door until a water supply tube isfully taken out.

(5) Assembly is the reverse order of disassembly

HOW TO DISASSEMBLE AND ASSEMBLE

- 66-

2

1

A A B

1

2

1

2

Cover, Hinge2Connecting

Line

EarthingCord

Lever, Hinge

A

B

（5）Hit the 4 buttons of the display with a (-) screw driverto loose it. Then pry the display’s cover from the gap between the buttons and the display, pull out the display circuit board to separate.

2.Display

display button

2. HANDLE

3. SHROUD, GRILLE FAN1) Loosen two screws after disconnecting a cap screw of a

grille fan(U) with a balde screwdriver.2) Disassembly of a grille fan(U) : Pull forward after

opening hook at part with a blade screwdriver.3) Disconnect housing A of a grille fan (L) from the main

body.

4) Disassembly of a grille fan (L) : Hold upper part of agrille fan(L) and pull forward carefully.

5) Loosen two screws.6) Disassembly of shroud. F(U) : Disconnect housing of B

after removing two rail guides with a blade screwdriver. 7) Disassembly of shroud. F(U) : Hold upper part and pull

forward.8) Check foam PU sticking conditions around a shroud,

F(U) and F(L) during assembling. If damaged, torn orbadly sticked, assemble with a new one after sealingwell.

4. ICEMAKER ASSEMBLY

1. Dispenser Model1) How to disassemble:

(1) Remove ice bank from the freezer compartment.(2) Loosen two screws on the upper part of icemaker

bracket.(3) Disconnect icemaker bracket so that it can slide

forward.(4) Disconnect icemaker housing and sensor housing.(5) Disconnect icemaker horizontally by pressing bracket

hook part. ( Don’t disassemble further. The set valuemay be changed.)

2) How to assemble : The assembly is the reverse order ofthe above disassembly.

Note : When the ice tray is not horizontal after assembly,assembly must be wrong. Check and assembleagain.

HOW TO DISASSEMBLE AND ASSEMBLE

- 67-

Bracket, Ice MakerHook

Ice Maker Unit

Lever

Tray, Ice

Sensor

Insulation

Cover, Sensor

1） Hit the location in the direction of arrow ① to loose.

Lift the handle up with hands in the direction of arrow ②, then pull out to separate.

2）

202A

200A

210B

201A

203A

205F

279A

207A

279B

501A

280E

FREEZER DOOR P A R T

EXPLODED VIEW

280D

205C

205D205B

205A

210B

210B

210C

210C

233A

232A

240C

240C

147A

231A

230A

239A 241B

241A

241C

240B

243A

240B

243A

205F

REFRIGERATOR DOOR P A R T

EXPLODED VIEW

205C

205D205B

205A

125A

126A

137B

136D

136A

136B

403A

136C

137A

408A

302B

316B

400A

128C 128D

128E

128F

131C

131E

131B

131D

154A

131J

132A

131H

FREEZER COMPARTMENT

EXPLODED VIEW

101A 270A

271B271A

402A

152A

272A

103A

105B

312A

135B

130A

409B

135A

120D

120B

120B

120C

137C

REFRIGER A T OR COM P A R TMENT

EXPLODED VIEW

160A

161A

165A

166C

166A

166B

166G

270B

271B

271C

103A

116A

272B

155A

101B

409B

402B

152A

162A

162B

177A

177B

170A

140A

171B

171A

140A

141A

115B

115F

115A

150A

146A

140A

151A

151B

151C

300A 310B

307A

304A

306A

310A

317B

317A

313A

301A

307A

104A

303C

303B

303A

500A

502B

502A

308A 308C

308B

309C

403B

309B

309A

305C 305B

305C

305B

305A

406A

105C

105E

105F

316A

EXPLODED VIEW MACHINE COM P A R TMENT

303D

105D

407A

407B

manual de servicio de la nevera lg (servicemanuals-lg-fridge-gcb197nfs-gc-b197nfs service manual)

Documents

micom circuit

compensation circuit

pwb circuit diagram

safety precautions

pwb parts drawing

parts identification

micom function

water pipe