R
REFRIGERATOR
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Model #s:
795.77562600
795.77569600
795.77564600
795.77563600
795.77572600
795.77579600
795.77573600
P/No. 3828JL8091A (Last Revision: March. 28. 2008)
CONTENTS
Safety Precautions
1.Specification .........................................................................................................................................................................
2.Parts Identification ...............................................................................................................................................................
3.Operation ..............................................................................................................................................................................
3-1. Explanation of Each Function .........................................................................................................................................
3-2. Ice Maker Function..........................................................................................................................................................
4.Wiring Diagram .....................................................................................................................................................................
5.Adjustment............................................................................................................................................................................
5-1. Compressor.....................................................................................................................................................................
5-2. Positive Temperature Coefficient (PTC) – Starter ...........................................................................................................
5-3. Over Load Protector (OLP) .............................................................................................................................................
5-4. Remove the cover Positive Temperature Coefficient (PTC)
6.Troubleshooting ...................................................................................................................................................................
6-1. Error Mode Summary......................................................................................................................................................
6-2. Troubleshooting With Error .............................................................................................................................................
6-3. Troubleshooting Else ......................................................................................................................................................
7.Component Testing Information .........................................................................................................................................
7-1. Defrost Controller Assembly ...........................................................................................................................................
7-2. Sheath Heater .................................................................................................................................................................
7-3. Door Heater Assembly ....................................................................................................................................................
7-4. Switch (F, R)....................................................................................................................................................................
7-5. Solenoid ..........................................................................................................................................................................
7-6. AC Motor Assembly ........................................................................................................................................................
7-7. Damper ...........................................................................................................................................................................
7-8. Lamp Socket ...................................................................................................................................................................
8.Disassembly Instructions ....................................................................................................................................................
9.PCB Assembly ......................................................................................................................................................................
10.Exploded View ....................................................................................................................................................................
SAFETY PRECAUTIONS
Please read the following instructions before servicing your refrigerator.
1.Unplug the power before handling any elctrical componets.
2.Check the rated current, voltage, and capacity.
3.Take caution not to get water near any electrical components.
4.Use exact replacement parts.
5.Remove any objects from the top prior to tilting the product.
- 2 -
1. SPECIFICATIONS
1-1 DISCONNECT POWER CORD BEFORE SERVICING
IMPORTANT – RECONNECT ALL GROUNDING DEVICES
All parts of this appliance capable of conducting electrical current are grounded. If grounding wires, screws, straps, clips, nuts or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened.
1-2 IMPORTANT NOTICE
This information is intended for use by individuals possessing adequate backgrounds of electrical, electronic and mechanical experience. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.
1-3 ELECTRICAL SPECIFICATIONS
Temperature Control (F |
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) ...-6°F to +8°F |
Defrost Control................... |
Total Comp Running Time 7 hrs |
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Defrost Thermostat ....................................................... |
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46°F |
Electrical Rating : 115VAC, 60Hz................................. |
1-5 A |
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Maximum Current Leakage....................................... |
0.5 mA |
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Maximum Ground Path Resistance .................... |
0.14 Ohms |
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Energy Consumption ..... |
25 cu.ft. 579 kWh/yr (Energy Star) |
1-4 NO LOAD PERFORMANCE CONTROL POSITION: MID/MID
And Ambient of: .................. |
70°F.................................. |
90°F |
Fresh Food, °F.................... |
33°F to 41°F......... |
33°F to 41°F |
Frozen Food, °F.................. |
-4°F to +4°F .......... |
-4°F to +4°F |
Percent Running Time ........ |
35%-45% ................. |
50°F-70°F |
1-5 REFRIGERATION SYSTEM
Minimum Compressor Capacity Vacuum |
............... 21 MIN. |
Minimum Equalized Pressure |
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@ 70°F ....................................................... |
49 PSIG |
@ 90°F ....................................................... |
56 PSIG |
Refrigerant R134a ................................................. |
4.41 oz. |
Compressor ..................................................... |
956 BTU/hr |
1-6 INSTALLATION
Clearance must be provided at top, sides and rear of the
refrigerator for air circulation. |
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AT TOP ......................................................................... |
2 in |
AT SIDES ...................................................................... |
1 in |
AT REAR ...................................................................... |
1 in |
1-7 REPLACEMENT PARTS
Relay.............................................................. |
6748C-0004D |
Overload ........................................................ |
6750C-0004R |
Defrost Thermostat........................................ |
6615JB2005H |
Defrost Heater ............................................... |
5300JK1005D |
Evaporator Fan Motor.................................... |
4681JK1004E |
Capacitor (Running) ..................................... |
0CZZJB2014B |
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*0CZZJB2012H |
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*0CZZJB2012K |
Compressor (Hi-Side) ................................... |
TCA31748001 |
Evaporator (Lo-Side)...................................... |
5421JJ1007A |
Condenser...................................................... |
5403JJ1004B |
Dryer.............................................................. |
5851JA2002P |
Condenser Fan Motor ................................... |
4681JB1029D |
Temperature Control .............................. |
3551JA1132L(SW) |
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3551JA1132M(ST) |
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3551JA1132N(WB) |
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3551JA1132P(BI) |
Main Control.................................................... |
EBR3491102 |
Ice Fan Motor ................................................ |
4681JB1029E |
*OPTIONAL |
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1-8 AIR FLOW / CIRCULATION D’AIR
EVAPORTOR FAN MOTOR
CONDENSER FAN MOTOR
ICE
ROOM
- 3 -
2. PARTS IDENTIFICATION
F |
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B |
O |
A |
Q |
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C |
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Basket |
Ice Bank |
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B Filter (Inside) |
J |
Durabase |
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C Modular Door Bins |
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Divider |
Ice Door |
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D Refrigerator Shelves |
L |
Ice Bin |
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E Supra Fresh Crisper with |
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Water Tank Cover |
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Tilt-Out Compartment |
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Snack Pan |
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F Ice Room |
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Egg Box |
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(ICEMAKER and ICE BIN) |
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Dairy Bin |
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G Pull out Drawer |
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Q Bottle Holder |
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H Turbo Motor |
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- 4 -
3. OPERATION
3-1. Explanation Of Each Function
1. Function
(1)When the appliance is plugged in, it is set to 37 °F for the refrigerator and 0 °F for the freezer.
You can adjust the refrigerator and the freezer control temperature by pressing the ADJUST button.
(2)When the power is initially applied or restored after a power failure, maintains its previously set temperature.
Refrigerator |
Ultra lce |
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Filter Reset |
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2 How to Toggle the Display between °F and °C
(1)The initial setting is °F and the display temperature mode can be changed from °F to ° C or ° C to ° F by pressing and holding the FRZ TEMP and the REF TEMP keys at the same time for over 5 seconds.
3. Lock function (dispenser and display button lock)
(1)When the refrigerator is first turned on, the buttons are not locked. The display panel shows the padlock unlocked icon.
(2)To lock the display, the dispenser, and the control panel, press and hold the LOCK button for 3 seconds. The locked pad lock icon is displayed.
(3)The LOCK button is the only control feature that remains active in the locked state. The buzzer sound, other control buttons, and the dispenser are deactivated.
(4)To release from the locked state, press and hold the LOCK button again for 3 seconds.
Press & Hold |
Press & Hold |
Ex) In selecting |
Ex) In selecting |
"LOCK" |
"LOCK" again |
4. Filter condition display function
(1) There is a replacement indicator icon for the filter cartridge on the dispenser.
(2)The water filter should be replaced approximately every six months.
(3)The water filter icon will turn on every six months to remind you to replace.
(4)After replacing the filter, press and hold the lock button more than 3 seconds.
This will turn off the reminder icon and reset the timer.
Classification |
In initial Power On |
Replace indicator |
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/ Filter RESET |
light on |
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Filter Status |
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Display |
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Press & Hold |
Press & Hold |
- 5 -
5. Ice Plus Selection
Please select this function for quick freezing.
(1)The ICE PLUS option starts counting its 24-hours period every time the button is pressed.
(2)The ICE PLUS function automatically turns off after twenty-four hours pass.
6. Dispenser Use Selection
You can select water or ice.
Select water, crushed ice, or ice cubes by cycling through the selections when pressing the DISPENSER button,
Hold your cup in the dispenser for a few seconds after dispensing
ice or water to allow the last pieces of ice or drops of water to fall into the cup.
7. Dispenser Light
Whenever the light button is pressed, the display changes as shown below.
Light Sensor
Auto |
Auto |
on
Pressing
Switch
Normal status: When dispenser is operated, DISPENSER LIGHT is ON.
AUTO status: Detecting the lighting of room by LIGHT SENSOR, DISPENSER LIGHT is on and off automatically. ON status: DISPENSER LIGHT is on continuously.
8. Control Of Freezer Fan Motor
(1)Freezer fan motor has high and standard speeds.
(2)High speed is used at power-up, for Ice Plus, and when refrigerator is overloaded. Standard speeds is used for general purposes.
(3)To improve cooling speed, the RPM of the freezer fan motor changes from normal speed to high.
(4)High speed (2700RPM) : Initial power on or load corresponding operation, Ice Plus Normal speed (2400RPM) : General working conditions.
(5)Fan motor stops when a refrigerator or freezer door opens.
9. Cooling Fan Motor
(1)The cooling fan is switched ON and OFF in conjunction with the compressor.
(2)The cooling fan runs at a single speed.
(3)The Failure sensing method is the same as in the fan motor of the freezing fan motor(refer to failure diagnosis function table for failure display).
10. Icing Fan
The Icing Fan is controlled by the the sensor on the top of the ice room. The Failure sensing method is the same as in the fan motor of the freezer (refer to failure diagnosis function table for failure display)
- 6 -
11. Ice Plus
(1)The purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice.
(2)Whenever selection switch is pressed, selection/release, the LED will turn ON or OFF.
(3)If there is a power outage and the refrigerator is powered on again, Ice Plus will be canceled.
(4)To activate this function, press the Ice Plus key and the LED will turn ON. This function will remain activated for 24 hours. The first three hours the compressor and Freezer Fan will be ON. The next 21 hours the freezer will be controlled at the lowest temperature. After 24 hours or if the Ice Plus key is pressed again, the freezer will return to its previous temperature.
(5)During the first 3 hours:
•Compressor and freezer fan (HIGH RPM) run continuously.
•If a defrost cycle begins during the first 90 minutes of Ice Plus, the Ice Plus cycle will complete its cycle after defrosting has ended.
If the defrost cycle begins when Ice Plus has run for more than 90 minutes, Ice Plus will run for two hours after the defrost is completed.
•If Ice Plus is pressed during defrost, Ice Plus LED is on but this function will start seven minutes after defrost is completed and it shall operate for three hours.
•If Ice Plus is selected within seven minutes after compressor has stopped, the compressor (compressor delays seven minutes) shall start after the balance of the delay time.
•The fan motor in the freezer compartment runs at high speed during Ice Plus.
(6)For the rest of the 21 hours, the freezer will be controlled at the lowest temperature.
12. Freezer and Refrigerator Lamp Auto Off
(1) To avoid heat damage caused by the lamp, it is turned off automatically when the refrigerator door is open for more than 7 minutes.
13. Alarm for Open Door
(1) This feature sounds a buzzer when the freezer or refrigerator door is not closed within 1 minute after it is opened.
(2 One minute after the door is opened, the buzzer sounds three times each for one half seconds. These tones repeat every
30seconds.
(3)The alarm is cancelled when the freezer or the refrigerator is closed.
Freezer Door Closed Open |
Closed Open |
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Closed |
or Refrigerator |
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Door |
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3 Times 3 Times 3 Times 3 Times |
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Buzzer |
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30 sec 30 sec 30 sec |
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Within 1 min. |
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1 min. |
- 7 -
14. Defrosting (removing frost)
(1)Defrosting starts each time the COMPRESSOR running time reaches 7 hours.
(2)For initial power on or for restoring power, defrosting starts when the compressor running time reaches 4 hours.
(3)Defrosting stops if the sensor temperature reaches 46.4°F (8°C) or more. If the sensor doesn’t reach 46.4°F (8°C) in 2 hours, the defrost mode is malfunctioning. (Refer to the defect diagnosis function, 15.)
(4)Defrosting won’t function if its sensor is defective (wires are cut or short circuited)
15. Defect Diagnosis Function
(1)Automatic diagnosis makes servicing the refrigerator easy.
(2)When a defect occurs, the buttons will not operate; but the tones will sound.
(3)When the defect CODE removes the sign, it returns to normal operation (RESET). (4 The defect CODE shows on the Refrigerator and Freezer Display.
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Auto |
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on |
Press & Hold |
Press & Hold |
LED check function: Press Ice Plus and Freezer buttons for a second, display LED graphics on. If releasing the button, the LED graphic displays the previous status.
- 8 -
3-2. Ice Maker Function
1. Operation Principle of icemaker
Power On
Start Position
Icemaking |
Mode |
Harvest |
Mode |
Park Position |
Fill |
Test Mode
•Adjusts EJECTOR to Start Position with power on.
•Waits until water becomes ICE after starting the icemaking operation.
•Runs MOTOR to drop ice from the tray into the ICE BIN. (During harvest mode, check if the ice bin is full.)
•Reaches Start Position
•Performs Ice Making Mode after supplying water by operating the SOLENOID in ICE VALVE.
•To operate LINE and SERVICE, press and hold the Cube Size button for 3 seconds. The icemaker will run through 3 stages:
HarvestFillIcemaking.
(1)Turning the Icemaker stop switch off (O) stops the ice making function.
(2)Setting the Icemaker switch to OFF and then turning it back on will reset the icemaker control.
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EJECTOR |
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Automatic |
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Cube Size |
Cube Size |
Shut off Arm |
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Indicator Light |
Power |
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Selection Button |
Switch |
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- 9 -
2. Icemaking Mode
(1)Icemaking refers to the freezing of supplied water in the ice tray. Complete freezing is assured by measuring the temperature of the tray with Icemaking SENSOR.
(2)Icemaking starts after completion of the water fill operation.
(3)The icemaking function is completed when the sensor reaches 1 9 ° F (-7 ° C), 55 minutes after starting. NOTE : After the icemaker power is ON, the icemaker heater will be on for test for 6 seconds.
3. Harvest Mode
(1)Harvest (Ice removing) refers to the operation of dropping cubes into the ice bin from the tray when icemaking has completed.
(2)Harvest mode:
•The Heater is ON for 30 seconds, then the motor starts.
•The feeler arm senses the quantity of ice in the ice storage bin while rotating with the EJECTOR.
A.Ice storage bin is full : The EJECTOR stops (heater off).
B.Ice storage bin is not full : The EJECTOR rotates twice to open for ice.
*If the EJECTOR does not rotate once within 5 minutes in B mode, separate heater control mode starts operating to prevent the EJECTOR from being constrained. (It is recommended that the user open for ice to return to normal mode.)
4. Fill/Park Position
(1)Once a normal harvest mode has been completed, the water solenoid will be activated.
(2)The amount of water is adjusted by pressing the fill key repeatedly. This changes the time allowed for fill as illustrated in the table below.
Water supply amount TABLE
STAGE |
TIME TO SUPPLY |
INDICATIONS |
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REMARKS |
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1 |
5 sec. |
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The water amount will vary depending |
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2 |
5.5 sec. |
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on the water control switch setting as |
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(FIRST STAGE) |
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well as the water pressure of the |
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connected water line. |
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3 |
6 sec. |
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- 10 -
5. Function TEST
(1)This is a forced operation for test, service, cleaning, etc. It is operated by pressing and holding the cube size button for 3 seconds.
(2)The test works only in the Icemaking Mode. It cannot be entered from the Harvest or Fill mode.
(3)Caution! Caution! Caution! Caution! If the test is performed before water in the icemaker is frozen, the ejector will pass through the water. When the fill mode begins (Stage 4), unless the water supply has been shut off, added water will overflow into the ice bin. If the control doesn ’ t
(4)After water is supplied, the normal CYCLE is followed: icemaking → Harvest → Park Position → Fill.
(5)Five seconds after Stage 5 is completed, the icemaker returns to MICOM control. The time needed to supply water resets to the
Diagnosis TABLE
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STAGE |
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ITEMS |
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INDICATOR |
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REMARKS |
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Five seconds after the heater starts, it |
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1 |
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HEATER |
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will go off if the temperature by |
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sensor is higher than 10°C |
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2 |
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MOTOR |
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Five seconds after the heater starts, you |
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can confirm that the motor is moving. |
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HALL IC I |
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Check whether ice bin is full. If the ice bin |
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if full, the motor and heater are off, but on |
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standby until the ice bin is empty. |
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4 |
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HALL IC II |
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You can confirm HALL IC detection of start |
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position. |
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5 |
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VALVE |
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Two seconds after the detection of start |
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position, you can confirm that the valve is on. |
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6 |
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Reset |
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Return to Status prior to |
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completed, the icemaker resets to initial |
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TEST MODE |
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status. |
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6. Error codes shown on the icemaker water supply control panel |
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NO |
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DIVISION |
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INDICATOR |
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CONTENTS |
REMARKS |
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1 |
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Normal |
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Mark time to |
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None |
Display switch |
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supply |
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operates properly |
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2 |
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Icemaking |
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Open or short-circuited wire |
Make sure that the wire |
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sensor |
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on each sensor is |
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malfunction |
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connected. |
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- 11 -
4. WIRING DIAGRAM
- 12 -
5. ADJUSTMENT
5-1. Compressor
1.Role
The compressor intakes low temperature and low pressure gas from the evaporator of the refrigerator and compresses this gas to high-temperature and high-pressure gas. It then delivers the gas to the condenser.
2.Composition
The compressor includes overload protection. The PTC starter and OLP (overload protector) are attached to the outside of the compressor. Since the compressor is manufactured to tolerances of 1 micron and is hermetically sealed in a dust and moisture-free environment, use extreme caution when performing repairs.
3.Note for usage
(1)Be careful not to allow over-voltage and over-current.
(2)If compressor is dropped or handled carelessly, poor operation and noise may result.
(3)Use proper electric components appropriate to the particular compressor in your product.
(4)Keep the compressor dry. If the Compressor gets wet (in the rain or a damp environment) and rust forms in the pin of the Hermetic Terminal, poor operation and contact may result.
(5)When replacing the compressor, be careful that dust, humidity, and soldering flux don’t contaminate the inside of the compressor. Dust, humidity, and solder flux may contaminate the cylinder and may cause noise, improper operation, or even lock up.
- 13 -
4. diagnosis
1 |
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Power Source. |
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2Check resistance of Motor Compressor.
Check
3resistance of PTC-Starter.
4Check OLP.
Remove PTC-Starter |
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(Rated Voltage |
YES |
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2 |
from Compressor and |
±10%)? |
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measure voltage between Terminal C of Compressor and Terminal 5 or 6 of PTC.
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OLP disconnected? |
YES |
5 |
No Voltage. |
Replace OLP. |
NO |
Check connection |
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condition. |
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Reconnect. |
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Applied voltage isn't |
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Advise customer that |
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5 |
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in acceptable range. |
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power supply needs to be |
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(115V ±10%) |
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checked by an electrician. |
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Check resistance between M-C, S-C and M-S in Motor Compressor.
Check resistance of two terminals in PTC-Starter.
Check resistance of two terminals in OLP.
The range of resistance is between 1~50Ω (ok)
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3 |
Open or short Replace |
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Compressor. |
3 |
4 |
5 |
Reference 5-2
Reference 5-3
5Check starting state.
Check the power supply under load. (Compressor attempting to re-start after being off for 5 minutes).
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YES |
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YES |
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Compressor |
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Supply |
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Did |
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is OK |
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voltage rating |
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compressor |
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with ±10%. |
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start? |
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Replace the |
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NO |
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compressor |
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NO |
1 |
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- 14 -
5-2. Positive Temperature Coefficient (PTC) – Starter
1. Composition
(1) PTC (Positive Temperature Coefficient) is a no-contact semiconductor starting device which uses ceramic material consisting of BaTiO3.
(2) The higher the temperature is, the higher the resistance value. These features are used as a starting device for the motor.
2. Role
(1) The PTC is attached to the sealed compressor and is used for starting the compressor motor.
(2) The compressor is a single-phase induction motor. For starting operation, the PTC allows current flow to both the start winding and main winding.
3. PTC – Applied circuit diagram ● Starting Method for the Motor
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OVERLOAD PROTECTOR |
LFX21960** |
3 |
2 |
5 |
6 |
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LFX25960** |
2 |
3 |
6 |
5 |
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N
C
PTC |
COMPRESSOR |
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2 |
MOTOR |
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S |
M |
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S |
M |
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L1 |
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PTC STARTER |
SEALED |
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TERMINAL |
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Resistance Starter Capacitor Running |
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4. Motor restarting and PTC cooling
(1) It requires approximately 5 minutes for the pressure to equalize before the compressor can restart.
(2) The PTC device generates heat during operation. Therefore, it must be allowed to cool before the compressor can restart.
5. Relation of PTC – Starter and OLP
(1)If the compressor attempts to restart before the PTC device is cooled, the PTC device will allow current to flow only to the main winding.
(2)The OLP will open because of the over current condition. This same process will continue (3 to 5 times) when the compressor attempts to restart until the PTC device has cooled. The correct OLP must be properly attached to prevent damage to the compressor. Parts may appear physically identical but could have different electrical ratings. Replace parts by part number and model number. Use only approved substitute parts.
6. Note for Using the PTC-Starter
(1)Be careful not to allow over-voltage and over-current.
(2)Do not drop or handle carelessly.
(3)Keep away from any liquid. If liquid such as oil or water enters the PTC, the materials may fail due to breakdown of their insulating capabilities.
(4)If the exterior of the PTC is damaged, the resistance value may be altered. This can cause damage to the compressor and result in a no-start or hard-to-start condition.
(5)Always use the PTC designed for the compressor and make sure it is properly attached to the compressor. Parts may appear physically identical but could have different electrical ratings. Replace parts by part number and model number. Use only approved substitute parts.
-15 -
5-3. Over Load Protector (OLP)
1. Define
(1)The OLP (OVERLOAD PROTECTOR) is attached to the Compressor and protects the motor by opening the circuit to the motor if the temperature rises and activating the bimetal spring in the OLP.
(2)When high current flows to the compressor motor, the Bimetal works by heating the heater inside the OLP, and the OLP protects the Motor by cutting off the current flowing to the Compressor Motor.
2. Role
(1)The OLP is attached to the sealed compressor used for the refrigerator. It prevents the motor coil from being started in the compressor.
(2)For normal operation of the OLP, do not turn the adjustment screw of the OLP in any way.
(OVERLOAD PROTECTOR cross section)
|
12345678 |
330 FBYY |
-S1 BOX98 |
Electrical characteristics part number
Customer part number
Lot code/ date code
Physical termination part number
Part
No. Name
Base, phenolic (UL 94 V-0 rated)
Movable arm support, plated steel
Stationary contact support, plated steel
Heater support, plated steel
Heater, resistance alloy
Disc, thermostatic alloy
Movable arm, spring temper copper alloy
Contact, movable, silver on copper
Contact, stationary, silver on copper
Slug, plated steel
Cover, polyester (UL 94 V -0 rated)
Pin connector, plated copper alloy (To engage 2.33/2.66 mm dia. pin) Quick-connect terminal, brass, conforms to UL 310, MEMA
DC-2, DIN 46344
5-4. Remove the cover Positive Temperature Coefficient (PTC)
(1)Remove the cover of the mechanical area.
(2)Disconnect the two clamps holding
the compressor in place.
(3) Loosen two screws on compressor base.
(4)Use a screwdriver to pry off the cover.
(5)Assembly is the reverse order of disassembly.
1 |
3 |
2
- 16 -
6. TROUBLESHOOTING
6-1. Error Code Summary
wWARNING : When you check the Resistance values, be sure to turn off the power. And wait for the voltage-discharge sufficiently.
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Error Display |
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Error Detection |
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Error Generation Factors |
Remark |
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NO |
Freezer |
Ref. |
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Category |
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Temperature |
Temperature |
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1 |
Normality |
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None |
Normal operation of Display |
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2 |
Freezer Sensor |
Er |
FS |
Short or Disconnection |
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Error |
of Freezer Sensor |
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3 |
Refrigerator |
Er |
rS |
Short or Disconnection |
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Sensor Error |
of Refrigerator Sensor |
Check each sensor and its |
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connector. |
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4 |
Defrosting |
Er |
dS |
Short or Disconnection |
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Sensor Error |
of Defrosting Sensor |
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5 |
Icing Sensor |
Er |
IS |
Short or Disconnection |
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of Icing Sensor |
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Error |
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Even though it is passed |
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1 hour since then |
Temperature Fuse |
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6 |
Poor Defrosting |
Er |
dH |
Defrosting , if Defrosting |
Disconnection, Heater |
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sensor is not over 8°C, it |
disconnection, DRAIN Jam, |
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is caused |
Poor Relay for Heater |
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It is caused when |
Poor BLDC Motor |
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Abnormality of |
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feedback signal isn’ t |
connection, DRIVE IC, and |
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7 |
BLDC FAN Motor |
Er |
IF |
over 115 |
TR Tx/Rx between icemaker |
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for Ice Making |
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seconds during BLDC |
and main board. |
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FAN motor operating |
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It is caused when |
Poor BLDC Motor |
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Abnormality of |
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feedback |
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connection, DRIVE IC, and |
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8 |
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signal isn’ t over 115 |
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BLDC FAN Motor |
Er |
FF |
TR Tx/Rx between icemaker |
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seconds during BLDC |
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for Freezer |
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and main board. |
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FAN motor operating |
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Abnormality of |
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It is caused when |
Poor BLDC Motor |
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9 |
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feedback |
connection, DRIVE IC, and |
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BLDC FAN Motor |
Er |
CF |
signal isn ’ t over 115 |
TR Tx/Rx between icemaker |
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for Mechanic Room |
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seconds during BLDC |
and main board. |
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FAN motor operating |
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Communication Error |
Poor Communication |
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Communication |
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connection,Poor TR of |
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10 |
Er |
CO |
between Micom of Main |
Transmitter and Receiver |
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Error |
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PCB and Display Micom |
Tx/Rx between icemaker |
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and main board. |
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- 17 -
6-2. Troubleshooting With Error
Freezer Sensor Err or
Is Er-FS dis played?
Yes
Is the connection loose? |
Yes |
Reconnect |
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Disconnect CON6 and measure |
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No |
Replace |
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the value. Is resistance value |
F-sensor |
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between pins 11 & 12 of CON6 |
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as below? (BL to BL) |
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pin11 pin12 |
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Test Point |
Result |
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pin11 to pin12 |
1.4 ~ 120k‰ |
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No
No
Reconnect CON6 and Power ON
Power Off
Tip : To protection of MICOM
If the ER-FS appears, Replace the main PCB. Otherwise, explain to the customer!
- 18 -
Refrigerator Sensor Error
Wiring dia gram
Is Er-rS displayed?
Yes |
|
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Is the connection loose? |
Yes |
Reconnect |
Disconnect CON6 and measure
the value. Is resistance value No between pins 9 & 10 of CON6 as below? (WH to WH)
pin9 pin10
No
Power Off
Tip : To protection of MICOM
Tpin10 pin9 |
Result |
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pin9 to pin10 |
6 ~ 300 k‰ |
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No
Reconnect CON6 and Power ON
If the ER-rS appears, Replace the main PCB. Otherwise, explain to the customer!
Replace
R-sensor
- 19 -
Defrost Sensor Error
CON6 |
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D-Sensor |
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BO |
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BO |
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Main PCB |
7 |
6 |
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1 |
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BO |
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BO |
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8 |
7 |
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Housing-A
Wiring dia gram
Is Er-dS displayed?
Yes
Is the connection loose? |
Yes |
|
No
Power Off
Tip : To protection of MICOM
Disconnect CON6 and measure
the value. Is resistance value No between pins 7 & 8 of CON6 as below? (BO to BO)
pin7 pin8
Reconnect
Replace
D-sensor
Is resistance value between |
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Replace a |
pins 1 & 2 of Housing- A as |
No |
D-Sensor |
below? (BO to BO) |
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pin2 pin1
Checking Open or Short of wire
Test Point |
Result |
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Pin1 To pin2 |
1.156 ~141.5k‰ |
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Yes
Reconnect and Power ON
If the ER-dS appears, Replace the main PCB. Otherwise, explain to the customer!
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Test Point |
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Result |
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Pin7 to pin8 |
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6 ~ 300k‰ |
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No |
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- 20 -
Icing Room Sensor Error
CON101
Display 1
PCB 2
Icing-Sensor
BL |
1 |
1 |
BL |
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BL |
2 |
2 |
BL |
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Housing-A |
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Wiring diagram
Is Er-IS displayed?
Yes |
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Is the connection loose? |
Yes |
Reconnect |
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Display PCB |
Inner of Icing door |
No |
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Disconnect CON101 and |
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Replace |
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measure the value. Is resistance No |
Main PCB |
value between pins 1 & 2 of |
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CON101 as below? (BL to BL) |
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pin2 BL |
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pin1 BL |
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Icing room Sensor Resistance
Test Point |
Result |
pin1 to pin2 1.156 ~141.5k‰
Is resistance value between |
No |
Replace the |
pins 1 & 2 of Housing- A as |
Icing-Sensor |
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below? (BL to BL) |
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pin1 BL pin2 BL
Checking Open or Short of wire
Test Point |
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Result |
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(1) To (2) |
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1.4 ~120k‰ |
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Yes |
Reconnect and Power ON
If the ER-IS appears, Replace Main PCB Otherwise, explain to the customer!
Yes
- 21 -
Defrost Heater Error
D-Sensor |
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6 1 |
BL |
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BO |
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BO |
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WH |
7 |
BN |
FUSE-M |
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1 |
6 |
7 |
Main |
10 |
2 |
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BO |
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BO |
BL |
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2 |
7 |
PCB |
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BK |
DEF-Heater |
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8 |
4 |
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1 |
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Housing-A |
CON6 |
CON3 |
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2 |
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BK |
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Wiring dia gram |
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3 |
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Is Er-dH displayed?
Yes
Is the connec tion loose?
Enter the TEST 3 MODE
Is the voltage value between pins 10 (WH) and 4 (BL) of CON3 115 V AC?
pin10 WH pin4 BL
Yes Reconnect
Relay operation
Test Point |
Result |
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pin4 To pin 10 |
115V |
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Yes
Reset TEST3 MODE(Normal) CON6 Is the voltage value between
pins 10 (WH) and 4 (BL) of CON3 for 0 V AC?
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pin10 WH |
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pin4 BL |
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CON3 |
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No |
Relay Open |
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Test Point |
Result |
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Reset/Norm op |
0 ~ 2 V |
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Replace
Yes MAIN PCB
Replace
No MAIN PWB
Yes
- 22 -
Is the resistance value |
Yes |
Normal |
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between pins 10(WH) |
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And 4(BL) of CON3 |
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like as below? |
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pin10 WH |
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pin4 BL |
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Resistance |
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Test Point |
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Ressult |
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(1) To (2) |
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34 ~ 42 Ω |
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No |
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Is the connection loose? |
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Yes |
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Reconnect |
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No |
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Is the resistance value |
No |
Replace |
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Fuse-M |
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of Fuse –M like |
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as below? |
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(1)BL
(2)BN
Open or Short of Fuse-M
Test Point |
Ressult |
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(1) To (2) |
0 Ω |
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Yes
Is the resistance value of |
No |
Replace |
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Heater |
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heater like as below? |
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(1) (2) |
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Heater Resistance |
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Test Point |
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Ressult |
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(1) To (2) |
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34 ~ 42 Ω |
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Yes |
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Is the resistance |
No |
Replace |
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DEF-sensor |
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value of DEF-sensor like |
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as below? It depends on |
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the temperature. |
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(1) BO
(2) BO
Defrost Sensor Resistance
Test Point |
Result |
Test Point |
Result |
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-30°C |
129.3 kΩ |
10°C |
19.53 kΩ |
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-20°C |
76.96 kΩ |
20°C |
13.03 kΩ |
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-10°C |
47.34 kΩ |
30°C |
8.896 kΩ |
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0°C |
30 kΩ |
40°C |
6.201 kΩ |
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Yes
Explain to the customer! :
It can be occurred, when the gasket is not stuck to product or when you put the high temperature loads (hot foods) a lot
in the product.
- 23 -
Freezer Fan Error
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WH |
1 |
1 |
BK |
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1 |
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Main |
BK |
2 |
2 |
RD |
F-FAN |
2 |
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PCB |
PR |
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PR |
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3 |
3 |
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3 |
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CON4 |
Housing |
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Wiring diagram
Is Er-FF displayed?
Yes |
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Is the connection loose? Yes |
Reconnect |
No |
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Reset and |
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No |
Replace |
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Enter the TEST 1 MODE |
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Main PCB |
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Is the output voltage between |
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pin1 and pin2 of |
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CON4 like as below? |
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Pin1 WH Pin2 BK |
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Freezer Fan Voltages
Test Point |
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Ressult |
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pin1 to pin2 |
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12 ~ 16 V |
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Yes |
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Does the cold-air come out |
No |
Check fan motor |
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of the top of the main duct? |
(Connector, |
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Frozen,Locked) |
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Yes |
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Is the feedback voltage |
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No |
Replace |
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between pin2 and pin3 of |
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Main PCB |
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CON4 like as below? |
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(from motor to main board) |
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Pin2 BK |
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Pin3 PR |
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Feedback Voltages
Test Point |
Ressult |
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pin2 to pin3 |
1 ~ 4 V |
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Yes
Explain to the customer!
- 24 -