rb196acwp

30

4. TROUBLESHOOTING

4-1) Check items before failure diagnosis4-1-1. TEST mode (Manual operation / Manual defrost function)

If the Power Freeze and Fridge Key on the front panel are pressed simultaneously for 8 seconds, it will bechanged to the Test Mode and all display on the front panel will be off.

If any key on the front panel is pressed within 15 seconds after changing to Test Mode, it will be operated asbelow sequence; Manual operation (FF) Manual defrost of R (rd) Manual defrost of F/R (Fd) Cancel(Display all off).

If any key on the front of panel is not pressed within 15 seconds after the Test Mode, the Test Mode will becanceled and it will be returned to previous mode.

If Power Freeze Key + Fridge Key are pressed simultaneously for 8seconds and all displays are off, it will be changed to the Test Mode (manual operation)

pressing any key.

1-1) If any key is pressed once in TEST MODE, "FF" blinks on the display and it indicates therefrigerator has entered the manual operation. At this moment, buzzer beeps as an alarm.

1-2) If manual function is selected, compressor will run at once without 5 minutes delay in any mode. Ifthe refrigerator is on the defrost cycle at the moment, defrost will be stopped and manual operationwill begin. (Be careful, if manual operation gets started immediately at the moment of compressoroff, overload could be occurred.)

1-3) If manual operation works, compressor & F-FAN operate continuously for 24 hours and fresh foodcompartment will be controlled by the setting temperature.

1-4) When the manual operation runs, setting temperature will be selected automatically as below ;Freezer compartment -14(-25), Fresh food compartment 32(1).

1-5) During manual operation Power Freeze & Power Cool function will not be worked. If a function isselected, the power function icon of the selected one will be off automatically after 10 seconds.

1-6) Manual operation can be canceled during manual operation by turning on the appliance afterpower off(resest) or choosing the following step 4) test cancel mode.

1-7) When the manual operation runs, alarm (0.25 seconds ON/0.75 seconds OFF) will beepcontinuously until manual operation is completed and there is no function to make the sound stop.

1) Manual operation function

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2-1) If any key is pressed one more time during manual operation (Fresh food compartment), "rd"shows in the display and then manual operation will be canceled at once and fresh foodcompartment will be defrosted.

2-2) At this moment, alarm beeps for 3 seconds from the beginning, and then beeps 0.1 sec ON/ 1 secOFF during manual defrost (Fresh food compartment) function.

2) Manual defrost (R : Fresh food compartment) function

3) Manual defrost (R & F : Fresh food & Freezer compartment) function

3-1) If any key is pressed one more time during manual defrost (defrost of fresh food compartment,"rd") "Fd" shows on the display and then fresh food and freezer compartments defrost will operate.Simultaneous manual defrost of Fresh food and Freezer compartment is on the extension of freshfood compartment, and when it begins, it operates by comparing the temperature of FreezerHeater ON, not compare the temperature of fresh food Heater ON separately, That is, in case ofmanual defrost of fresh food, it is the Heater On condition and if the simultaneous manual defrostof fresh food and freezer compartment key before completing deforest, it does not make fresh foodcompartment heater OFF by re-comparing the temperature of fresh food compartment EVA.

3-2) At this time, alarm beeps for 3 seconds from the beginning, and then beeps 0.5 sec. ON/ 0.5sec.OFF during manual defrost function of fresh food and freezer compartment.

4) Test cancel mode4-1) During defrosting of fresh food and freezer compartments simultaneously, if the display panel

changes to the test mode and test button is pressed one more time, defrosting of fresh food andfreezer compartments will be canceled at the same time and will return to the normal operation. Or,all test functions will be canceled by turning main power ON and OFF.

1) Self-diagnostic function in the initial power ON.1-1) Micom operates self-diagnostic function to check the temperature sensor condition within 1 second

when the refrigerator turned On initially.1-2) If bad sensor is detected by the self-diagnostic function, the all applicable display LED will blink for

0.5-second interval. At this moment, there is no beep sound.(Refer to self-diagnostic CHECK LIST)

1-3) Self-diagnostic button is recognized only when the error is displayed by the bad sensor. Displaydoes not operate normally but temperature control will be controlled by the emergency operation.

1-4) When the error is detected by self-diagnosis, the error can be canceled automatically if all troubledsensors are corrected or Self-diagnostic function key (Power Freeze + Power Cool) are pressedsimultaneously for 8 seconds. (Return to normal display mode)

4-1-2. Self-diagnostic function

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If Power Freeze Key + Power Cool Key are pressed simultaneously for 8 seconds,the error mode by self-diagnosis will be canceled.

2) Self-diagnostic function during normal operation

2-1) If Power Freeze Key + Power Cool Key are pressed simultaneously for 6 seconds during normaloperation, the temperature setting display will operate for 2 seconds (ALL ON/OFF 0.5 sec each).If Power Freeze Key + Power Cool Key are pressed simultaneously for 8 seconds (including above2 seconds), self-diagnostic function will be selected.

2-2) At this moment, self-diagnostic function will be returned with buzzer sound 'ding-dong'. If there isan error, display of error will be operated for 30 seconds and then return to normal conditionwhether problem is corrected or not. (Buzzer sounds 'ding-dong') (Refer to self-diagnosis CHECK LIST).

2-3) Input by button is not acceptable during self-diagnostic function.

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TROUBLESHOOTING

Self-diagnosis CHECK LIST

NO

1

2

3

4

5

6

7

8

9

10

Trouble item

R-Sensor Error

R-DEF-Sensor Error

R-FANError

R-DEF. - Heater Error

Ambient-Sensor Error

F-Sensor Error

F-DEF-Sensor Error

F-FAN Error

C-FAN Error

F-DEF. - Heater Error

Display LED

R-1-

R-1-

R-1-

R-1-

F-1-

F-1-

F-1-

F-1-

F-1-

F-1-

Trouble contents

R SENSOR part error.

R defrost SENSOR part error.

R inner fan motor part error.

R defrost part error.

External SENSOR part error.

F SENSOR part error.

F defrost SENSOR part error.

F inner fan motor part error.

Machine room fan motor part error.

F defrost part error.

F-10 F-1 R-10 R-1

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TROUBLESHOOTING

Self-diagnostics check listLED Item

R-1-

R-1-

R-1-

R-1-

F-1-

F-1-

F-1-

F-1-

F-1-

F-1-

R-Sensor Error

R-DEF-Sensor Error

R-FAN Error

R-DEF. Error

Ambient-Sensor Error

F-Sensor Error

F-DEF-Sensor Error

F-FAN Error

C-FAN Error

F-DEF. Error

Display error : In case of Separation ofsensor housing part, contact error,disconnection, short circuit.Display error by temperature : when thesensing temperature is more than 149(+65) or less than -58(-50).

Display error : In case of separation ofdefrost heater housing, contact error,disconnection, short circuit, or temperaturefuse error.Display error : If defrost does not finishthough the defrost of fresh foodcompartment is heating continuously formore than 80 minutes.

Display error : In case of separation ofsensor housing parts, contact error,disconnection, short circuit.Display error by temperature : When thesensing temperature is more than 149(+65) or less than -58(-50).

Display error : In case of Feed Backsignal line contact error, separation ofmotor wire, motor itself error duringoperation of applicable fan motor.

When checking the voltage of MAIN PCBCN30 #3 #8 : Shall be between4.5V~1.0V.

When checking the voltage of MAIN PCBCN30 #4 #8 : Shall be between4.5V~1.0V.

When checking the voltage of MAIN PCBCN31 #1 #3 : Shall be between4.5V~1.0V.When checking the voltage of MAIN PCBCN30 #5 #8 : Shall be between4.5V~1.0V.When checking the voltage of MAIN PCBCN30 #6 #8 : Shall be between4.5V~1.0V.

Voltage of MAIN PCB CN76 Pink Gray :Shall be between 7V~12V.

Voltage of MAIN PCB CN76 Blue Gray :Shall be between 7V~12V.

Voltage of MAIN PCB CN76 Yellow Gray : Shall be between 7V~12V.

After separating MAIN PCB CN72 wire from PCB, the checked resistance value of CN70 White Orange shall be103/397ohm 10% (Resistance value isvaried by input power) Model withoutIce maker (120ohm 10%) Check 0 Ohmfor heater short, &Ohm for wire / bimetalOpen.

After separating MAIN PCB CN72 wire from PCB, the checked resistance value of CN70 Brown Orange shall be 66/240 ohm 10%.(Resistance value is varied by input power)Check 0 Ohm for heater short, &Ohm forwire / bimetal Open.

Display error : In case of Feed Back signal linecontact error, separation of motor wire, motor itselferror during operation of applicable fan motor.Display error : In case of Feed Back signal linecontact error, separation of motor wire, motor itselferror during operation of applicable fan motor.

Trouble contents Diagnostic method

Fresh food Compartment

Display error : In case of separation ofdefrost heater housing, contact error,disconnection, short circuit or temperaturefuse error.Display error : If defrost does not finishthough the defrost of freeze compartmentis heating continuously for more than 70minutes.

Freeze Compartment

NW2()-AC 2010.5.22 9:2 AM 34 in

If Power Freeze Key + Power Cool Key are pressed simultaneously for 6 seconds, All ON/OFF will blink at 0.5 second intervals for 2 seconds.

If taking the finger off from the keys when above blinking condition and press Fridge Key, load condition mode will be started.

1) If Power Freeze Key + Power Cool Key are pressed simultaneously for 6 seconds, ALL ON/OFF willblink at 0.5 second intervals for 2 seconds.

2) At this moment, if taking the finger off from Power Freeze Key + Power Cool Key and pressing FridgeKey, load condition display mode will be returned with alarm ("Ding-dong").

3) Load condition display mode shows the load that MICOM signal is outputting. But, it means that MICOMsignal is outputting and does not means whether load is operating or not actually. That is, though loadoperation is displayed, load could not be operated by actual load error, PCB relay error, or etc. And thisfunction would be applied at Service (A/S).

4) Load condition display function will maintain for 30 seconds and then normal condition will be returnedautomatically.

5) Load condition display is as below.

35

4-1-3. Display function of Load condition

TROUBLESHOOTING

F-10 F-1 R-10 R-1

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TROUBLESHOOTING

Load mode Check list

Display LED

R-1-

R-1-

R-1-

R-1-

R-1-

R-1-

R1-

F-1-

F-1-

F-1-

F-1-

R-10-

R-10-

Display contents

R-FAN High

R-FAN Low

R-DEF Heater

Start Mode

Overload condition

Low temperature condition

Normal Condition

Exhibition Mode

COMP.

F-FAN High

F-FAN Low

F-DEF Heater

C-FAN High

C-FAN Low

Operation contents

When fresh food compartment FAN High operates, applicable LED ON.

When fresh food compartment FAN Low operates, applicable LED ON.

When fresh food compartment defrost heater operates, LED ON.

When initial power applied to refrigerator, LED ON.

When ambient temperature is more than 93(34), LED ON.

When ambient temperature is less than 72(22), LED ON.

When the ambient temperature is between 73(23) ~ 91(33).

F-1-,ALL LED Off

At the display mode, LED ON.

When compressor operates, applicable LED ON.

When freezer FAN High operates, applicable LED ON.

When freezer FAN Low operates, applicable LED ON.

When freezer defrost heater operates, LED ON.

When compressor FAN High operates, applicable LED ON.

When compressor FAN Low operates, applicable LED ON.

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4-1-4. Display / Exhibition mode setting function

4-1-5. Option setting function

If Freezer Key + Power Cool Key are pressed simultaneously for 12 seconds during normal operation,fresh food and freezer compartments temperature display will be changed to option setting mode.

TROUBLESHOOTING

1) If Power Freeze Key + Freezer Key are pressed simultaneously for 3 seconds during normal operation,exhibition / display mode will be started with buzzer sound ("Ding-dong").

2) If above Power Freeze Key + Freezer Key are pressed repeatedly, exhibition / display mode will becanceled.

3) If exhibition / display mode is selected, "OF-OF" blinks on the temperature setting display of the paneland it indicates the refrigerator has entered the exhibition / display mood.

4) If fresh food and freezer compartments sensors are higher than 149(65) during exhibition / displaymode, exhibition / display mode will be canceled automatically and cooling operation will be returned.(There is no buzzer sound when the exhibition/display mode is canceled by the temperature.)

5) Operation contents of exhibition/display mode-. All function like display, fan motor, etc operate normally, but only compressor does not operates.-. Defrost is not operated.-. Display function of initial actual temperature is finished.-. Exhibition/Display mode will be operated though Power ON after Power OFF under the

exhibition/Display mode condition.

If Power Freeze Key + Freezer Key are pressed for 3 seconds,exhibition / display mode will be started.

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38

1) For example, if you want to change freezer compartment standard temperature to -4 (-2) byoperating option, do as following. This function is for changing the standard temperature. In -2(-19)of current temperature of freezer compartment, if you make the temperature lower to 28.4(-2) by theoption, the standard temperature would be controlled -6(-21). Therefore, if you changed the settingof temperature option to -2(-19) on the panel, the appliance will be operated with -6(-21). Itmeans that standard temperature is controlled 28.4(-2) less than setting temperature in the display.

TROUBLESHOOTING

Code Reference Value

Key control in option modePower Freeze Key

Freezer KeyPower Cool key

Fridge key

Code Down keyCode Up key

Reference Value down keyReference Value Up key

If the display changes to option setting mode, all displays will be off except freezer and fresh foodcompartments temperature display as below. (Fresh food and freezer compartments is explained onlybecause all options are operated with the same method according to the option table.)

Basically, option function has cleared data at shipping process. Therefore, all setting value are"0". But, check the quality information manual or specifications, because setting value could bechanged particularly for the purpose of improving quality at mass producing process.NOTE

If Freezer Key + Power Cool Key are pressed simultaneously for 12seconds, option setting mode will be started.

Code Up ReferenceValue Up

CodeDown

ReferenceValue Down

ReferenceValueCode

Key control method after changing to option mode.

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TROUBLESHOOTING

2) After changing to the option mode, fresh food compartment "0", freezer compartment "0" will bedisplayed. (Basically, fresh food compartment "0", freezer "0" would be set at shipping process, butsetting value could be changed for the purpose of improving quality at mass producing process.)- If fresh food compartment "0" shows only, temperature reference value of freezer compartment will be

set and current freezer compartment temperature code will be displayed on the freezer temperaturedisplay.

3) If freezer compartment "4" is set as below freezer compartment code after fresh food compartment "0" isset, standard temperature of freezer compartment will be lower than 28.4(-2.0).(Refer to the picture"Changing the freezer compartment temperature")

4) Option changing method as above is the same as all LMF model.5) Option function is set in the EEPROM at shipping process in the factory. You would better not to change

the option of your own. Completing the setting is that option function return to normal display after 20seconds. Do not turn off the appliance before returning to the normal display mode.

: If you wait for 20 seconds after completing the setting, MICOM will save the setting value to theEEPROM and normal display will be returned and the option setting mode will be canceled.

Code Reference Value

Option setting function exists in the other items. We will skip the explanation of the otherfunctions by the option because it is associated with refrigerator control function and is notneeded at SERVICE.(Please do not set the other options except above SERVICE Manual.)

NOTE

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TROUBLESHOOTING

4-1-6. Option TABLE

Reference ValueCode

1) Temperature changing table of freezer compartment

ex) If you want to change the freezer standardtemperature to -28.4(-2C)

Setting ITEM Freezer Temp ShiftFridge Room 7-SEG

0

Setting value

Temp.compensation

0123456789101112131415

32(0.0)31.1(-0.5)30.2(-1.0)29.3(-1.5)28.4(-2.0)27.5(-2.5)26.6(-3.0)25.7(-3.5)32.9(+0.5)33.8(+1.0)34.7(+1.5)35.6(+2.0)36.5(+2.5)37.4(+3.0)38.3(+3.5)39.2(+4.0)

FreezerCompartment

Code

ReferenceValue

Reference ValueCode

2) Temperature changing table of fresh food compartment

ex) If you want to change the freezer compartmentstandard temperature to 35.6(2C).

Setting value Fridge Temp ShiftFridge Room 7-SEG

1

Setting value

Temp.compensation

0123456789101112131415

32(0.0)31.1(-0.5)30.2(-1.0)29.3(-1.5)28.4(-2.0)27.5(-2.5)26.6(-3.0)25.7(-3.5)32.9(+0.5)33.8(+1.0)34.7(+1.5)35.6(+2.0)36.5(+2.5)37.4(+3.0)38.3(+3.5)39.2(+4.0)

Freezercompartment

Code

ReferenceValue

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TROUBLESHOOTING

4-2) Diagnostic method according to the trouble symptom(Flow Chart)DATA1.Temperature tableResistance value and MICOM port voltage of sensor according to the temperatureSENSOR CHIP : based on PX41C

-50-49-48-47-46-45-44-43-42-41-40-39-38-37-36-35-34-33-32-31-30-29-28-27-26-25-24-23-22-21-20-19-18-17-16-15-14-13-12-11-10-9-8-7-6

-58-56.2-54.4-52.6-50.8-49

-47.2-45.4-43.6-41.8-40

-38.2-36.4-34.6-32.8-31

-29.2-27.4-25.6-23.8-22

-20.2-18.4-16.6-14.8-13

-11.2-9.4-7.6-5.8-4

-2.2-0.41.43.25

6.88.610.412.214

15.817.619.421.2

4.6944.6774.6594.6414.6224.6024.5814.5604.5374.5144.4904.4654.4394.4124.3854.3564.3264.2964.2644.2324.1994.1654.1294.0934.0564.0183.9803.9403.8993.8583.8163.7733.7293.6853.6403.5943.5483.5013.4533.4053.3563.3073.2583.2083.158

15331914479413679812929412224811563110941310356998073929038803783456791427507771246676346422761012579775511252406498484743145146429844093839002371693543333788322303075229350280212676025562244252334522320213452041819537186981790117142

Voltage Resistance-5-4-3-2-10123456789101112131415161718192021222324252627282930313233343536373839

2324.826.628.430.232

33.835.637.439.241

42.844.646.448.250

51.853.655.457.259

60.862.664.466.268

69.871.673.475.277

78.880.682.484.286

87.889.691.493.295

96.898.6100.4102.2

3.1073.0573.0062.9552.9042.8532.8022.7512.7002.6492.5992.5482.4982.4492.3992.3502.3012.2532.2052.1582.1112.0642.0191.9741.9291.8851.8421.7991.7571.7161.6751.6361.5961.5581.5201.4831.4471.4121.3771.3431.3091.2771.2531.2131.183

164191573115076144521385713290127491223311741112711082310395998695969223886785268200788875907305703267716521628160525832562154195225503948614690452643694218407239333799367035473428334432043098

Voltage Resistance404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384

104105.8107.6109.4111.2113

114.8116.6118.4120.2122

123.8125.6127.4129.2131

132.8134.6136.4138.2140

141.8143.6145.4147.2149

150.8152.6154.4156.2158

159.8161.6163.4165.2167

168.8170.6172.4174.2176

177.8179.6181.4183.2

1.1531.1241.0951.0681.0401.0140.9880.9630.9380.9140.8910.8680.8460.8240.8030.7830.7620.7430.7240.7060.6880.6700.6530.6360.6200.6040.5890.5740.5600.5460.5320.5190.5060.4930.4810.4690.4570.4460.4350.4240.4140.4040.3940.3840.375

2997289928052714262725432462238423092237216721002036197319131855179917451693164215941547150214581416137513351297126012251190115711251093106310341006978952926902877854832810

Voltage Resistance

NW2()-AC 2010.5.22 9:2 AM 41 in

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TROUBLESHOOTING

2) If R Sensor has trouble

Bad contact of connector/Insert correctly

Is Main PCBConnector CN30 inserted

correctly?

Is R Sensor unitnormal?

Is the voltage between MainPCB Connector CN30- #3(Red) & REG1,

Heat Sink normal?

Is the input voltage to IC10 MICOM #53

normal?

Start

NO

YES

YES

YES

YES

Replace the temperature sensor

NO

Recheck the wire connection part

NO (0.6V > Measurement < 4.6V)

Check the Cold solder joint, short, solder Touch

NO

No trouble with PCB and temperature sensor.Recheck the bad contact of the connector.

** Measuring point of resistance value accordingto Sensor **

R : CN30 #3 #8 Measure the resistance value** : Short trouble / : Open trouble

Sensor MICOM/Connector number

Voltage is measured between 4.6V ~ 0.6V

Voltage of IC10 MICOM #53 is same with themeasuring voltage of CN30-#3(Red), REG1, & HeatSink from PCB common Ground part. Check the measure on MICOM or Sensor

Marking #1(R301).

DATA1.Temperature Table

ERROR Code

Refer to circuit diagram in the manual

R Connector CN30#6(White) to REG1HEAT-SINK PCB typical Ground

Checking method of R Sensor resistance CN30-#3(White) #8(Gray)-. Compare with the temperature table after

measuring

Checking method of R Sensor voltage.-. Measure the voltage of Sensor Check Point #1(IC10 MICOM

#53) on PCB or CN30-#3(Red) REG1, Heat Sink-. Compare with the temperature table after measuring. Below is

measuring voltage of CN30-#3(Red) REG1, Heat Sink.Common PCBGround of REG1, Heat Sink

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TROUBLESHOOTING

3) If R DEF Sensor has trouble


Is Main PCB Connector CN30 inserted correctly?

Is R DEF Sensor unit normal?

Is the voltage between Main PCB Connector CN30- #4(Orange) and REG1,

Heat Sink normal?

Is the input voltage of IC10 MICOM # 54

normal?

Start

NO

YES

YES

YES

YES


NO

Recheck the wire connection part


Check the Cold solder joint, short, solder Touch

NO

No trouble with PCB and temperature sensorRecheck the bad contact of the connector.

** Measuring point of resistance value according toSensor **R-DEF : CN30 #4 #8 Measure the resistance value ** : Short trouble / : Open trouble

Sensor MICOM/Connector Number


Voltage of IC10 MICOM #54 is same with themeasuring voltage of CN30-#4(Orange), REG1,&Heat Sink from PCB common Ground part. Check the measure on MICOM or, Sensor

Marking #2(R303).

DATA1.Temperature Table

ERROR Code


R DEF Connector CN30-#4(Orange) and REG1Heat-Sink PCB common Ground

Start

YES

YES

YES

Checking method of R DEF Sensor resistanceCN30-#4(Orange) #8(Gray)-. Compare with temperature table after measuring.

Check method of R DEF Sensor voltage-. Measure the voltage of Sensor Check Point #2(IC10 MICOM

#54) on PCB or CN30-#4(Orange) REG1, Heat Sink.-. Compare with temperature table after measuring.

Below is the measuring voltage of CN30-"4"(Orange) REG1, Heat SinkCommon PCBGround of REG1 Heat Sink

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TROUBLESHOOTING

4) If Ambient Sensor has trouble


Is Main PCBConnector CN31 inserted

correctly?

Is Ambient Sensor unit normal?

Is the voltage between Main PCB Connector CN31-#1(White) and REG1,

Heat Sink normal?

Is the input voltage of IC10 MICOM #59

normal?

Start

NO

YES

YES

YES

YES


NO

Recheck the wiring connection


Check the Cold solder joint, short,solder touch.

NO


** Measuring point of resistance value according toSensor **Ambient : CN31#1 #3 Measure the resistance value ** Placed in the right top table of upper hinge.** : Short trouble / : Open trouble


Voltage measured between 4.6V ~ 0.6V.

Voltage of IC10 MICOM #59 is same with themeasuring voltage of CN31-#1(White), REG1, &Heat Sink from PCB common Ground part. Check the measure on the MICOM or, Sensor

Marking #5(R309).

DATA1.Temperature table

ERROR Code


Ambient Connector CN31-#1(White) and REG1Heat-Sink PCB common Ground

Start

YES

YES

YES

Checking method of Ambient Sensor resistanceCN31-#1(White) #3(White)-. Compare with the temperature table after

measuring.

Checking method of Ambient Sensor voltage-. Measure the voltage of Sensor Check Point #5(IC10 MICOM

#59) on PCB or CN31-"1"(White) REG1, Heat Sink.-. Compare with the temperature table after measuring.

Below is the measuring voltage of CN31- #"1(White) REG1, Heat SinkCommon PCBGround of REG1 Heater Sink

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TROUBLESHOOTING

5) If F Sensor has trouble

BAd contact of connector / Insert correctly

Is Main PCB ConnectorCN30 inserted correctly?

Is F Sensor unit normal?

Is the voltage between Main PCB Connector CN30-#5(Yellow) and REG1,

Heat Sink normal?

Is the input voltage of IC10 MICOM #57 normal?

Start

NO

YES

YES

YES

YES

Replace temperature sensor

NO

Recheck the wiring connection


Check Cold solder joint, Short, solder Touch

NO


** Measuring point of resistance value according toSensor **F : CN30 #5 #8 Measure the resistance value** : Short trouble / : Open trouble


Voltage is measure between 4.6V ~ 0.6V

Voltage of IC10 MICOM #57 is same with themeasuring voltage of CN31-"5"(Yellow), REG1, &Heat Sink from PCB common Ground part. Check the measure on MICOM or, SensorMarking #3(R305).


ERROR Code


F Connector CN30-#5(Yellow) and REG1 Heat-Sink PCB common Ground

Start

YES

YES

YES

Checking method of F Sensor resistanceCN30-#5(Yellow) #8(Gray)-. Compare with the temperature table after

measuring.

Checking method of F Sensor voltage-. Measure the voltage of Sensor Check Point #3(IC10 MICOM

#57) on PCB or CN30-#5(Yellow) REG1, Heat Sink.-. Compare with the temperature table after measuring.

Below is the measuring voltage of CN30-"5"(Yellow) REG1, Heat Sink.common PCBGround of REG1 Heater Sink

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TROUBLESHOOTING

6) If F DEF Sensor has trouble


Is Main PCB ConnectorCN30 inserted correctly?

Is F DEF Sensor unit normal?

Is the voltage between Main PCB Connector CN30-#6(Pink) and REG1,

Heat Sink normal?

Is the input voltage of IC10 MICOM #58 normal?

Start

NO

YES

YES

YES

YES

Replace temperature sensor

NO

Check the wiring connection.


Check Cold solder joint, Short, Solder Touch

NO


** Measuring point of resistance value accordingto Sensor **F-DEF : CN30 #6 #8 Measure the resistance value ** : Short trouble / : Open trouble



Voltage of IC10 MICOM #58 is same with themeasuring voltage of CN30-"6"(Pink) and REG1, & Heat Sink from PCB common Ground part. Check the measure on MICOM or, Sensor

Marking #4(R307).


ERROR Code


F DEF Connector CN30-#6(Pink) and REG1 Heat-Sink PCB commonGround

Start

YES

YES

YES

Checking method of F DEF Sensor resistanceCN30-#6(Pink) #8(Gray)-. Compare with the temperature table after

measuring.

Checking method of F DEF Sensor voltage-. Measure the voltage of Sensor Check Point #4(IC10 MICOM

#58) on PCB or CN30-"6"(Pink) REG1, Heat Sink.-. Compare with the temperature table after measuring.

Below is the measuring voltage of CN30-"6"(Pink) REG1, Heat SinkCommon PCBGround of REG1 Heater Sink

NW2()-AC 2010.5.22 9:2 AM 46 in

47

TROUBLESHOOTING

-. The refrigerator of this model has BLDC FAN moror. BLDC motor is driven by DC 7~12V.-. On the normal condition of COMP ON, it operates together with F-FAN motor.

If door is opened and closed once at a high ambient temperature, it will be operated after 1 minute delay.Therefore, you are advised not to taken it for an error.

-. If there is a trouble, you should select the self-diagnostic function to check the trouble before power off.

4-2-1. If FAN does not operate (F, R, C - FAN)

Start

Is COMPRESSORON?

Door & MICOM State

Door

F FAN pulse voltageCN76- #2(Pink)

Common PCB GroundREG1 Heater Sink

The voltage is measured around 2~3V withmulti-meter, though the voltage is changedbecause of pulse signal.

Display for checking the self-diagnostic functionR FAN ERROR

FMICOM(#60)

CloseOpen

0V(High)5V(Low)

0V(Low)5V(High)

R MICOM (#52)

Execute manualoperation

FAN works normally

Repair the connectionof Door S/W

Replace or repair Main PCB

1) F-FAN 2) R-FAN 3) C-FAN

Common PCBGround of REG1 Heater Sink

Power ON with 5 minutesdelay after power OFF.(For preventing the overload of compressor)

Expected causes FAN-MOTOR has failure itself.Check the bad contact of wiring

connection.Check the input of the motor

rotation pulse when fan motoroperates.

The pulse signal generated when motor rotates will be inputted into CN76-#2(F),#3(R),#1(C). These signals will be inputted into MICOM. If signalsare not inputted during motor operating, the fan is turned OFF and ONagain after 10 seconds. But if signals are not still entered, above operationis repeated for 4 times more. If signals are not entered continuously, themotor is restarted after 10 seconds. This function is effective when thenormal operation of motor is locked by foreign matters such as ice.

Checking method of R,F,C FAN Motor The voltage of PCBcommon Ground REG1 Heater Sink andF FAN ; CN76-#5(Red) shall be less than DC 7~12V.R FAN ; CN76-#6(Brown) shall be less than DC 7~12V.C FAN ; CN76-"4"(Orange) shall be less than DC 7~12V.-. Recheck if resistance values are different after measuring.

Is the voltage between Main PCB REG1 Heater Sink and CN76

-#5(Red) around DC7~12V?Is the voltage between Main

PCB REG1 Heater Sink and CN76-#6(Brown) around DC7~12V?

Is the voltage between Main PCB REG1 Heater Sink and CN76 -

#4(Orange) around DC7~12V?

Is the external temperature above 66.2(19)?

Is the external temperature above66.2 (19 )?

Recheck after 5 minutes(Time could be delayeddepending on thetemperature). If the temperature islower, it may not operate.; about59(below15)

Is the voltage between Main PCB REG1 Heater Sink and CN30-

#1 (Black) around 0V?Is the voltage between

Main PCB REG1 Heater Sink andCN30-#2 (Brown) around 0V?

Does DC7~12V alternate with below DC2V between Main PCB REG1 Heater

Sink and CN76-#5(Red)?

Does DC7~12V alternate with below DC2V between Main PCB REG1 Heater

Sink and CN76-#5(Red)?

Does DC7~12V alternate with below DC 2V between Main PCB REG1 Heater

Sink and CN76-#4 (Orange)?

When initial power is applied toappliance, the compressor and fansof fridge/freezer/compressor operate.If freezer temperature is sensed 41by momentary power failure, fans willoperate after 5minutes.

Reference

F FAN ERROR

C FAN ERROR

NW2()-AC 2010.5.22 9:3 AM 47 in

Start

Are all the defrostheater normal?

Check the bimetal, heater disconn-ection itself, wiring connection, etc

Refer to self-diagnosticfunction in the manual

Replace and repair theapplicable sensor

Manual operation for a certain period of time

Manual defrost of Fridge andFreezer operate simultaneously.

Resistance value of sensor according to temperature

Refer to DATA1.Temperature Table for the

detailed temperature.

** Measuring point of defrost value according to Heater **F-DEF : CN72 #7(Brown) #3(Orange)

measure the resistance value(66/240 ohm 10%)R-DEF : CN72 #5(White) #3(Orange)

measure the resistance value(103(120)/397ohm 10%)** 0 : Short trouble / 0: Open(Bimetal, heater) trouble

Checking method of F,R DEF Heater resistance value.F DEF ; CN72-#7(Brown) #3(Orange)R DEF ; CN72-#5(White) #3(Orange)-. Check additionally, if resistance values are different after

the measuring.1) F DEF Heater 2) R DEF Heater

** Measuring point of resistance value according to Sensor **F-DEF : CN30 #6 #8 measure the resistance valueR-DEF : CN30 #4 #8 measure the resistance value** 0 : Short trouble /0 : Open trouble

** Measuring Point of resistance value according to Sensor **PCB common Ground REG1 Heater Sink andF-DEF:CN30 #6 (or Sensor Marking #4(R307),R-DEF:CN30 #4 (or Sensor Marking #2(R303), measure the resistance value.** 0V : Short trouble / 5V : Open trouble

86(30)68(20)50(10)32(0)

14(-10)-4(-20)-22(-30)

4.226.058.8713.2920.4232.2352.41

If Power Freeze Key + Fridge Key are pressedsimultaneously for 8 seconds and then select any key, 3rdTest Mode(Manual defrost) will be operated.

Is the temperature of defrost sensor lower than

53.6(12)?

Is defrost sensor byself-diagnostic normal?

Is power applied toeach defrost heaters?

Is connectionterminal of Main PCB

part normal?

Recheck the applicable sensor which is notreturned.

If defrost sensor temperature of fridge & freezer arehigher than 50(10) & 53.6(12) by the heatingof heater, heating will be finished and returns to thecooling operation after making a pause.

Normal

Repair connection terminal

Reference

Check bimetal, heater itselfdisconnection, wiring connection,

etc.

Replace failure Relay or replacePCB Ass'y

Does the systemreturn to cooling operation after heating

for specified time?

48

TROUBLESHOOTING

- If defrost has trouble, select the self-diagnostic function to detect the error of defrost heater before Power off. (Check thefunction with referring to the self-diagnostic function)

4-2-2. If defrost does not operate (F, R DEF Heater)

R DEF ERROR F DEF ERROR

NW2()-AC 2010.5.22 9:3 AM 48 in

49

TROUBLESHOOTING

4-2-3. If Power is not supplied

CautionAt the power of main PCB, AC input powerand a high voltage over DC170V(325V)areoccurred. Please take care of yourself onrepair and measurement.

Check in SMPS part

Start

- Refer to function and 'reference'parts in the manual whenchecking Main PCB

Connect plug again, & check the plugloosening.

1) Change FUSE AC 250V 2.0A2) Replace PCB ASS'Y

Check the assembly and connection ofwire

1) Check PCB PATTERN and replaceBD1

2) Replace PCB ASS'Y

1) Check REG1 (KA7805)2) Replace PCB ASS'Y

1) Check & repair the assembly of wire2) Replace Panel PCB

1) Check the contact of Lead Wire2) Replace the applicable Relay

(Replace PCB Main)

1) Solder again2) Replace PCB Main

Replace PCB ASS'Y

- Check Main PCB connection- Check the connections betweenupper hinge Cabi-Door

- Check Door Panel PCB connection

Is plug connected in ?Input Voltage115V 15%

Is Fuse on the SMPS PCB

normal?

Is 115V applied to both terminals of

SMPS power VAR1 ?

Is DC 170V applied to both terminals of

BD101 +,-?

Is 12V applied toboth terminal of C111?

Is 5V applied to both terminal of

C113?

Does Panel PCB operates

normally?

Is the load such as relay

normal?

Is there any PCB soldering, Short, or

breakage?

Normal (Recheck)

Checking method of voltage SMPS input ;VAR1 both terminals, or CN10 both terminalAC power.


Checking method of DC secondary output voltageREG1 input ; Regulator 7805 input Samewih C111 both terminals.DC 12.0V 0.8V

Checking method of DC secondary output voltageREG1 input ; Regulator 7805 input Samewith C113 both terminals.DC 5V 0.5V

NW2()-AC 2010.5.22 9:3 AM 49 in

Start

Did 5mins pass after Compressor

Off?

Check after 5 mins

Normal

Check bad contact of connector

Replace / Repair COMP ASS'Y

No

No

Yes

Yes

Yes

NO

NO

Yes

Yes

Yes

Does compressor work with manual

operation?

Is IC10 MICOM #28 hight?

(5V)

Is IC71 #13 about

0.7V?

Is CN72 connector

normal?

Is COMP ASS'Y

normal?

Normal (Recheck)

Refer to test function in the manual

Did buzzer of manual operation sound?(Check certainly after manual operation)

Check Cold solder joint / Replace PCB

1) Change IC71 Driver IC (TD62083AP)2) Replace PCB

Refer to the circuit diagram in the manual

50

TROUBLESHOOTING

4-2-4. If compressor does not operate

Preliminary Inspection"Check the compressor with selecting the manual operation"1. Compressor does not work, unless 5mins pass after satisfying the temperature.2. Compressor does not work during defrosting.3. Compressor does not work because it sensing low temperature, unless the fridge & freeze sensor is connected.

Checking method of voltagePCB common Ground REG1 Heater Sink and1) IC10 MICOM #28 ; Voltage is high

(5V 0.5V) when compressor is working.

Checking method of voltagePCB common Ground REG1 Heater Sink and1) IC71 #13 ; Voltage is Low (0.7V) when

compressor is working.Common PCB GroundREG1 Heater Sink

NW2()-AC 2010.5.22 9:3 AM 50 in

51

TROUBLESHOOTING

4-2-5. If alarm sounds continuously without stop (Related with buzzer sound)Preliminary Inspection1. The alarm of freezer / fridge will sound(Ding-dong) after 2minutes from initial door open, and it keeps sounding(ding-dong)

at 1 minutes intervals when opening afterward.2. The alarm sounds because MICOM sense as door-open when door is not pressed completely. So refrigerator inner lamp

will be OFF after 10minutes from sensing door-open. In this case, the inner lamp will not ON though the door is openedactually.

If 'ding-dong' sounds continuously.

If 'beep-beep' sounds continuously.

Start

Start

Replace PBA Main Testpart, Solder Touch, &Main PCB

Is door closed completely?

Is water penetrated into the door

switch?

Is theconnector(CN30) inserted

correctly?

Is Door S/W itself(unit)

normal?

Is manual operation / defrost

selected?

Does buzzer sound when Power On

again?

Recheck Main PCB & Door switch

Is input voltage of Main #60 & #52changed at door-open &

door-close?

Remove the cause after comprehendingthe conditions of interference by doorgasket, food, etc.

Repair the trouble of wire connectionand door switch

Repair the bad inserting of connectorand bad contact.

Cancel the manual operation / defrostfunction.

Replace door switch

Replace door switch

Normal

Door & MICOM State

Door

CloseOpen

FMICOM(#60)

RMICOM(#52)

0V(Low) 5V(High)

0V(Low)5V(High)

Separate the door switch and check if the measuredvalue of unit is changed from 0 to according toswitch On/OFF.* Fridge Door Switch is magnetic switch. (It can be

operated when door magnet is combined)

NW2()-AC 2010.5.22 9:3 AM 51 in

If buzzer does not soundIf buzzer does not sounds when button is pressed, manual operation is started, or door is opened,separate Main PCB and then check the breakage of buzzer, bad soldering, etc.(It is recommended to replace Main PCB when the failure of parts is occurred after checking.)

Start

Does it sound 'Dingdong' if press a button

on the frontpanel?

Is the breakage or damage of the buzzer

in the Main PCB?

Recheck the button pressing force andmechanical problem

Check if the lead of component isfallen from the vibration plate of

Buzzer or not.

Does it make a sound of 'Door Open'

alarm when opening the door offreezer or fridge more than

2 minutes?

Main PCB is normal & BUZZER isnormal

Check the panel PCB with referring"How to check Panel Display"

Replace Main PCB

52

TROUBLESHOOTING

NW2()-AC 2010.5.22 9:3 AM 52 in

53

TROUBLESHOOTING

When lightning of Panel PCB is disabled

4-2-6. If Panel PCB does not work normally

Start

No

Yes

Yes

Yes

Yes

Yes

Yes

No

Is the PANEL PCBnormal?

Is the connector of upper hinge COVER

inserted correctly?

No problem / Recheck

Is the connector of PANEL PCB part

inserted correctly?

Is Main PCB connector(CN50)

inserted correctly?

Reinsert connector and checkthe bad contact.

Reinsert the connector of MainPCB and check the bad contact.

Reinsert connector of PANELPCB and check the bad contact.

Replace PANEL PCB

Replace PCB

Check parts trouble, fallen PCB Pattern, Solderconnection of parts

Yes

NoIs Main PCB 12V normal?(Check the power)

Check the connecting part of left/right CABIupper hinge according to left/right opening ofdoor.

Check the connecting part of left/right doorupper hinge according to left/right openingdoor.

Door Part - Check the connecting wire of upper hinge Panel - Check the disconnection & short between wires. Freezer upper CABI - Check the wires between Main PCB - Check the disconnection & short between wires.

NW2()-AC 2010.5.22 9:3 AM 53 in

54

TROUBLESHOOTING

If Panel PCB Key is not selected

Start

No

No

Yes

No

Yes

Yes

No

No

Is Child Lock KEYpressed?

Are any keys arepressed from 6 of keys?

Replace PANEL PCB

Is Panel PCB connectorinserted correctly?

Is connector of upper hinge cover inserted

correctly?

Yes

NoIs Main PCBconnector(CN50) inserted

correctly?Reinsert the Main PCBconnector/ Replace

Reinsert the connector andcheck the bad contact.

Reassemble the Panel PCBCover

Reinsert the connector andcheck the bad contact.

Unlock the Child Lock

NW2()-AC 2010.5.22 9:3 AM 54 in

55

TROUBLESHOOTING

4-2-7. If refrigerator Room Lamp does not light up (F,R - Same condition)

1. When you replace the lamp of freezer/fridge, please power off/unplug AC Cord to avoid an electric shock.2. Please keep in mind you could get burnt by the excessive heating of an incandescent light bulb.3. Bimetal is installed in the refrigerator Lamp. Check that if Lamp may be OFF by bimetal. (It may be deleted per model.)

When lightning of Panel PCB is disabled Start

No

No

Yes

No

Yes

Yes

No

No

Is the Door switchcontact normal?

Is Lamp OFF bybimetal operating?

Check the connection of RDoor switch and check & repair the inner lamp socket.

Is the inner lampfilament cut?

Is the control relay of the inner lamp in PCB?

(RY76)1) Replace PCB

(Expected trouble)-. IC71(#15, #16)-. IC10(#31, #32)-. Relay(RY75,RY76)

2) Bad connection of wire-. CN71("5" Pink, "3" Blue

Wait for returning time of bimetal

Replace the inside lamp

Replace Door S/W

The inner lamp relay operates lighting/lights-out according to door open/close.

If inner lamp does not light, check thenoise of relay operation.

Noise of relay operation sounds everyDoor Open / Close.

F-LAMP Relay -- RY75 R-LAMP Relay -- RY76

Preliminary Inspection

If the door is opened, the contact of door switch will be opened and MICOM will get applied 5V and finally it senses the door open.If it sense 5V for more 2 minutes afterward, Door-open alarm will sound "Ding-Dong" for 10 seconds in 1 minute cycle.Therefore,if the door switch has failure, the refrigerator can make a "Ding-Dong" sound per 1minute cycle. Please refer this for its service.

Preliminary Inspection

Door & MICOM State

Door

CloseOpen

FMICOM(#60)

RMICOM(#52)

0V(Low) 5V(High)

0V(Low)5V(High)

Applied to the model using bimetal only. (Option)

When measure the lamp resistance to the wire, Resistance can be changedby Lamp input voltage.(Below is the actual measurement and the valued can be changed by function.)

Checking method of Door Switch voltage-. PCB common Ground REG1 Heater Sink and

CN30-"2"(Brown) : measure the voltage (R Door Switch)CN30-"1"(Black) : measure the voltage (F Door Switch)=> See the R DOOR Switch at the following picture

CLOSE

OPEN


Fridge Lamp(Option)CN72-#9(Red) CN71#3(Blue) ; 27Ohm 10%Lamp ; 40W (Basis on 120V)

Freeze LampCN72-#9(Red) CN71#5(Pink); 25Ohm 10%Lamp ; 40W(Basis on120V)

NW2()-AC 2010.5.22 9:3 AM 55 in

56

TROUBLESHOOTING

4-2-8. If refrigerator ROOM Lamp does not light up (F,R - Same condition) - LED1. When you replace the lamp of freezer/fridge, please power OFF

[Explain cold-storage room lamp on the basis of.]When lightning of Panel PCB is disabled Start

No

Yes

Yes

No

Yes

No

No

Is the Door switchcontact normal?

Is the output voltage ofIC71 normal?

Normal / Re-check

Is the output voltageof IC10 MICOM #32

Normal?

Is the main PCB connector(CN71)insertion status normal?

Replace PCB/ Repair the IC71

Re-insert the connectorYes

NoDoes the main PCB connector(CN71)Output normal?(11~13V)

Check the connector terminalReplace PCBYes

NoIs the LED Lamp connectedProperly?

Check the connector terminalYes

Yes

NoIs the LED Lamp normal?

Replace LED Lamp

Replace PCB

Replace Door S/W

Door & MICOM State

Door

CloseOpen

FMICOM(#60)

RMICOM(#52)

0V(Low) 5V(High)

0V(Low)5V(High)

MICOM(LAMP) State

Door

CloseOpen

FMICOM(#31)

RMICOM(#32)

0V(Low) 5V(High)

0V(Low)5V(High)

IC71 State

MICOM(#31/ #32)

IC71 output(#15/ #16)

0V(Low) 5V(High)

12V(High)0V(Low)

Checking method of Door Switch voltage-. PCB common Ground REG1 Heater Sink and

CN30-"2"(Brown) : measure the voltage (R Door Switch)CN30-"1"(Black) : measure the voltage (F Door Switch)=> See the R DOOR Switch at the following picture

CLOSE

OPEN


Output voltage checking method-. PCB common Ground REG1 Heater Sink and

CN71-"5"(Pink) : measure the voltage (F LED Lamp)CN71-"3"(Blue) : measure the voltage (R LED Lamp)=> Picture is R LED Lamp operation below.

CLOSE

OPEN


NW2()-AC 2010.5.22 9:3 AM 56 in

4. TROUBLESHOOTING4-1) Check items before failure diagnosis4-1-1. TEST mode (Manual operation / Manual defrost function)4-1-2. Self-diagnostic function4-1-3. Display function of Load condition4-1-4. Display / Exhibition mode setting function4-1-5. Option setting function4-1-6. Option TABLE

4-2) Diagnostic method according to the trouble symptom(Flow Chart)4-2-1. If FAN does not operate (F, R, C - FAN)4-2-2. If defrost does not operate (F, R DEF Heater)4-2-3. If Power is not supplied4-2-4. If compressor does not operate4-2-5. If alarm sounds continuously without stop (Related with buzzer sound)4-2-6. If Panel PCB does not work normally4-2-7. If refrigerator Room Lamp does not light up (F,R - Same condition)4-2-8. If refrigerator ROOM Lamp does not light up (F,R - Same condition) - LED

rb196acwp

Documents

manual function

simultaneous manual

manual operationwill

r rd manual

fresh foodcompartment

power freeze key fridge

previous mode

seconds on0