Bottom mounted freezer type

TROUBLE SHOOTING........................ 44
5. PCB/PBA DAIGRAM ........................ 84
6. WIRING DIAGRAM ......................... 85
7. BLOCK DIAGRAM........................... 86
8. CYCLE DIAGRAM .......................... 87
9. SENSOR LAYOUT .......................... 88
10. REFERENCE INFORMATION.................. 89

control system.
Beware of electric shock.
- Use the rated electronic control device.
Check the model name, rated voltage, rated current, working temperature and so on.
- During maintenance, make sure that the harness is not immersed in water and is connected firmly. It will not be disconnected due to certain external force.
- During maintenance, it is required to remove dust or other foreign substances on the gluey housing, harness and connector.
Prevent the electric leakage due to aging or fire hazard in short circuit.
- Check for water penetration into the electronic control system. If water penetrates into the system, take necessary measures, for example, replacing the related components or covering with insulating tape.
- After the troubleshooting, check the assembly status of the disassembled components. It shall be the same as that before maintenance.
- Check the surrounding environment of the refrigerator. If the refrigerator is installed in humid place or unstable place, it is required to change the installation position.
- Ground it as needed. It shall be grounded especially in case of danger of electric shock.
- Do not overload the socket. Check whether the power wire or socket is damaged, squeezed, cut off or thermally deformed. Immediately repair or replace the defective power cord/socket. Make sure that the power cord is not broken or pressed by a heavy object.
- Do not store perishable food or bottle in the freezer.
- The user is not allowed to repair the refrigerator.
- Do not store the materials other than food. It is difficult for the refrigerator to maintain the accurate temperature required for substances like drugs and chemical substances.
Flammable materials (alcohol, benzene, hydrogen, liquefied petroleum gas, etc.) are in danger of explosion.

instructions in order to prevent danger or property damage.

1. PRECAUTIONS (SAFETY WARNINGS)

(SAFETY WARNINGS)

not dissemble or repair the refrigerator by yourself.
- You run risk of causing a fire, malfunction and/or personal injury.
Remove any foreign matter or dust from the power plug pins.
- Otherwise there is a risk of fire.
Do not use a cord that shows cracks or abrasion damage along its length or at either end.
Do not plug several appliances into the same multiple power board. The refrigerator should always be plugged into its own individual electrical which has a voltage rating that matched the rating plate.
- This provides the best performance and also prevents overloading house wiring circuits, which could cause a fire hazard from overheated wires.
Do not install the refrigerator in a damp place or place where it may come in contact with water.
- Deteriorated insulation of electrical parts may cause an electric shock or fire.
The refrigerator must be grounded.
- You must ground the refrigerator to prevent any power leakages or electric shocks caused by current leakage from the refrigerator.
Do not put bottles or glass containers in the freezer.
- When the contents freeze, the glass may break and cause personal injury.
Do not store volatile or flammable substances in the refrigerator.
- The storage of benzene, thinner, alcohol, ether, LP gas and other such products may cause explosions.

dismantling the product. Reassemble it in the order reverse to that of disassembly.

Notice that the door shall not fall off when the hinge is removed

Beware of scratch.

①

②

Assy Door

is removed

Beware of scratch.

③

3. Disassembly and assembly

Assy Door

in pairs.

3. Disassembly and assembly

doors, cut off the main power supply. Take out the content and
dismantle the door accessories, such as protective hood of the door. Be cautious so as to prevent the
door falling down during the dismantling or assembly.

1. Be careful to avoid the paint being scratched.
2. Place the screws and related components in mating, to avoid placing them wrongly.
3. Prepare a cushion that will not scratch the door surface.(such as blanket)
4. When exchanging the refrigerator doors, the refrigerator shall be free from oil dirt.

Reassemble it in the order reverse to that of disassembly

Be cautious so as to prevent the door falling down during the dismantling.

Door is very heavy. Operate cautiously to avoid being injured.

①

②

DOOR EXCHANGE

hinges.

A. Door is very heavy. Operate cautiously to avoid being injured

③

3. Disassembly and assembly

DOOR EXCHANGE

cardboard under the refrigerator.

3. Disassembly and assembly

DOOR EXCHANGE

to place a big cardboard under the refrigerator.

to place a big cardboard under the refrigerator.

to place a big cardboard under the refrigerator.

the floor.

3. Disassembly and assembly

custom panel

3. Disassembly and assembly

compartment” button for more than 4 seconds, so that the panel will display for 3 seconds at the interval of 0.5 second. Then press “freezer” button. Then, it goes into the test mode.
2. In the test mode, all display buttons will be used as the test button.
3. When test button is pressed, the refrigerator will operate in the following sequence.
Forced Operation → Forced defrost → Function removal (normal operation)
4. It is recommended to insert the plug again to terminate the operation of test function.

② Enter the test mode and press the “freezer” button.

① Press the “freezer” button and “refrigerator compartment” button for 4 seconds.

4. Troubleshooting

4-1. Troubleshooting checklist

4-1-1. Test function (forced Operation /forced defrost)

1) Select the test function

①

②

is selected, the compressor and the F-Fan operate for 24 hours without stopping.
1-4) When the unit is shifted to the Forced Operation, the Freezer and the Fridge temperatures will be automatically set to -23℃ and 1℃ respectively.
1-5) When the Forced Operation is selected, the Power Freeze function won't work. (All the buttons will operate normally.) And, when the Power Freeze function is selected, the Power Freeze LED will go off in 10 seconds.
1-6) When the Forced Defrost or Test Cancellation Mode is selected within a minute with the Forced Operation being selected, the set temperature will be changed to the previously set operating temperature.
1-7) The alarm sound during the Forced Operation keeps on until the Forced Operation completes and there is no cancellation function.

1-1) When any button is pressed once during the Test Mode, it will enter the Forced Operation. When it starts the Forced Operation, the LED Lamps indicating the Fridge Temperatures (1℃, 2℃, 3℃, 5℃, 7℃) and the Freezer Temperatures (-23℃,-21℃,-19℃, -17℃,-15℃) will be on showing that it is on the Forced Operation. At this time, it starts alarming with “Beep” sounds.
1-2) When the Forced Operation is selected, the compressor starts without a 7-minute delay in any operation mode. At this time, when it is in a Defrost mode, it stops defrosting and the Forced Operation begins. (If the Forced Operation begins as soon as the compressor stops, it may cause the overload. So, take care when entering into the Forced Operation.)

4. Troubleshooting

4-1. Troubleshooting checklist

4-1-1. Test function (forced Operation /forced defrost)

during the Test Mode, press any button once. Then, the Forced Operation will stop immediately and it will go into the Forced F-Defrost. When it enters the Forced F-Defrost, it indicates that it is on the Forced F-Defrost mode by turning on "3℃", "5℃" and "7℃" temperature LEDs on the Fridge Display Panel and "-15℃”, “-17℃” and “-19℃" temperature LEDs on the Freezer Display Panel.
2-2) At this time, it sends out "Beeping" sound for 3 seconds. This alarm sound repeats 0. 5 sec On and 0.5 sec Off which keeps on until the Forced F-Defrost finishes.

3) TEST MODE Cancel

3-1) When turning the display panel into the Test mode and pressing the TEST button once more during the Forced F-Defrost, the Forced F-Defrost will be cancelled and it will go back to the normal operation. Also, when the unit is plugged out and in again, the Test mode is to be deactivated.

4. Troubleshooting

4-1. Troubleshooting checklist

4-1-1. Test function (forced Operation /forced defrost)

the status of the temperature sensors in a few minutes.
1-2) If defective sensor is found after Self-Diagnosis, relevant Display LEDs will blink at an interval of 0.5sec. and there will be no beeping sound. (Refer to the Self-Diagnosis Check List)
1-3) When there is a defective sensor found and its relevant LED blinks, it will only recognize the Self-Diagnosis button combination and it doesn't do the normal display. But, the temperature will be controlled with the Emergency Operation.
1-4) To cancel the error code, fix the failure of the defective sensor or cancel the Initial Self-Diagnosis Function by pressing the Freezer and the Fridge buttons for 13 seconds.

1) Self-diagnosis Function upon Initial Power-On

2-1) During the Normal Operation, press the Freezer + Fridge buttons for 7 seconds. Then, the "2℃, 3℃and 5℃" Fridge temperature LEDs and the "-17℃,-19℃ and -21℃" Freezer temperature LEDs on the Display Panel will blink at the interval of 0.5 seconds for 3 seconds. When pressing the Freezer and the Fridge buttons at the same time for 10 seconds including the 3-second Display On/Off time, the Fridge "3℃" and the Freezer "-19℃" Temperature LEDs will blink for 3 seconds with an interval of 0.5 second. At this time, when pressing the Freezer and the Fridge buttons at the same time for 13 seconds including the 3-second blinking time, it will send out a "Ding-Dong" buzzer sound and go into the Self Diagnosis Function.
2-2) When it goes into the Self-Diagnosis, the entire display panel goes off and when there is an error occurred, it will last for 60 seconds continuously and go to the normal operation whether or not the error is fixed. (It sends out "Ding-Dong" sound) (Refer to the Self-Diagnosis Check List below)
2-3) Buttons won't work during Self-Diagnosis.

2) Self-diagnosis during normal operation

4. TROUBLESHOOTING

4-1. Check-List before Trouble-Shooting

4-1-2) Self-Diagnosis Function

the Freezer + Fridge buttons for 7 seconds. Then, the "2℃,3℃ and 5℃" Fridge temperature LEDs and the "-17℃,-19℃ and -21℃" Freezer temperature LEDs on the Display Panel will blink at the interval of 0.5 seconds for 4 seconds.
2) At this time, release the Freezer + Fridge buttons and press the Fridge button (it sends out "Ding Dong“ sound.) Then, it shifts to the Load Display mode.
3) The Load Display function shows what MICOM signals come out from MAIN PCB. But, it just indicates that there are MICOM signals coming out. It does not necessarily mean that the related parts (Loads) are operating. In other word, even though it shows a certain load working, the related part may not operate due to such as a defective PCB relay or the defective part itself (it needs checking).
4) The Load Display function lasts for 30 seconds and then it goes back to the normal operation.
5) The following image shows load locations with the LEDs.

①

②

Block A

Block B

① Press the Freezer + Fridge buttons for 7 seconds at the same time. Then, the Display LEDs will blink for 3 seconds. At this time, release the buttons
② and, press the Fridge button once.

Display Panel is initialized by the instant power outage, it will cause customer inquiries. To prevent this, when the power is restored, the previous settings will be restored or reset based on the inside temperature of the Freezer Compartment.
2) Upon the initial power on, it checks its Freezer temperature. When it is lower than +10℃, it is to be considered as an instant power failure and it brings back all its previous operation functions ( such as Power Freeze, Power Cool, Fridge, Freezer, etc ） related to the panel display.
3) When it is higher than +10℃, it is to be considered as a long-period power failure and it will initialize the panel display.(Freezer : Automatically set to -19℃ ， Fridge : Automatically set to 3℃ ）

ON

ON

4. TROUBLESHOOTING

press the Freezer + Fridge buttons for 7 seconds. Then, the "2℃, 3℃ and 5℃" Fridge temperature LEDs and the "-17℃, -19℃ and -21℃" Freezer temperature LEDs on the Display Panel will blink at the interval of 0.5 seconds for 3 seconds.
2) At this time, release the Freezer + Fridge buttons and press the Freezer button (it sends out "Ding Dong“ sound.) Then, it shifts to the Demo mode.
3) During the Demo Mode，when the Freezer or Fridge room temperature goes over 65℃ during the Demo Mode, it will go back to the normal cooling operation.
4) Action items when Demo Mode setting
- When the unit is in Demo Mode, all the functions including the Display Panel works normal. But, theCompressor does not operate.
- Defrosting does not start.
- Turn off its power to cancel the Demo Mode.

①

②

Block A

Block B

① Press the Freezer + Fridge buttons for 7 seconds at the same time.
② The Display LEDs will blink. At this time, release the buttons and press the Freezer button once.

4. TROUBLESHOOTING

Fridge buttons for 4 seconds.Then, the entire Display Panel will blink at the interval of 0.5 seconds for 3 seconds.
At this time, release the Freezer + Fridge buttons and press the Fridge button (it sends out "Ding Dong" sound.) Then, it shifts to the Option Setting mode.
● When there is no button press for 20 seconds at the Option Setting Mode, it will go back to the normal display mode.

①

②

4. TROUBLESHOOTING

① Press the Freezer + Fridge buttons for 4 seconds at the same time.Then, the Display LEDs will blink for 3 seconds. At this time, release the buttons
② and, press the Fridge button once.

the selected Option Set Value
② Displays the selected Option #
③ OPTION SET VALUE INCREASE BY ONE DEGREE (Rotation Type)
④ OPTION # INCREASE BY ONE DEGREE (Rotation Type)

in the following tables (Binary Type)

4. TROUBLESHOOTING

Option Mode & Button Operation Description

the entire Display except the Freezer and the Fridge Temperature LEDs as shown below Temp LED goes off.

For example, if you want to shift the standard temp of the Freezer compartment by -2℃, follow the steps below. This function is to change the default temperature and when the default temperature of the Freezer compartment is -21℃ and the default setting is lowered by -2℃ with the Option function, the default temperature will be controlled at -23℃. That is, when changing temperature options, the Freezer compartment will operate at -23℃ internally even if it shows -21℃ on the display panel. Therefore, the temperature will be controlled by -2℃ lower than the set temperature on the display panel.

Note

Basically, when units being shipped out, all the data in the Option function are cleared. That is, the Default settings are “0”. However, for the purpose of quality improvement during mass production, the Default values may change. Therefore, be sure to check quality information, such as SVC bulletins.

2) After changing into the Option mode,“0" on both of the Fridge and Freezer compartments lights up on the display panel. (when units being shipped out, the unit will be shipped out with "0"s set on both of the Fridge and Freezer compartments. However, for the purpose of quality improvement during mass production, the Default values may change
- When the Fridge Display set to the status of the Option #0, it will be set to the Freezer Temperature Option and the current Freezer Temperature Set Value will be shown on the Freezer Temperature Display(Refer to the Freezer Temp Shifting Image).

Freezer Temp setting

Fridge Temp setting

4. TROUBLESHOOTING

Option Mode & Button Operation Description

Table below after setting the Fridge Option # to "0", theFreezer default temperature will decrease by -2℃. (Refer to the Freezer Temp Shift Figure):In 20 seconds after completing the adjustment, MICOM is to store the setting value in EEPROM and itgoes back to the normal display mode, deactivating the Option Setting mode.
4) The Fridge temperature can be adjusted with the same method.
5) Make sure not to change the factory-set default values excluding exceptional circumstances.Also, the Option Setting will be completed when it goes back to the normal display mode in 20 seconds.So, do not turn off the unit before it goes back to the normal display mode.

4. TROUBLESHOOTING

Option Mode & Button Operation Description

of freezer is -2.0℃

-15℃

-17℃

-19℃

-21℃

-23℃

7℃

5℃

3℃

2℃

1℃

4. TROUBLESHOOTING

is +2.0ºC

-15℃

-17℃

-19℃

-21℃

-23℃

7℃

5℃

3℃

2℃

1℃

4. TROUBLESHOOTING

4-1-8. Option TABLE

Troubleshooting Flow-Chart by Symptoms

Error and, when the unit is plugged in and there are sensor errors, the unit does not operate and LED related to the defective sensors keep blinking.
- When sensor defects occur during the operation, the unit keeps working. But, it shifts to the Emergency Operation and it may not work properly. So, please check the unit according to the Self Diagnosis function.

ERROR CODE

4. TROUBLESHOOTING

1) When the R-Sensor is defective

occurs

4. TROUBLESHOOTING

ERROR CODE

69

CODE

CODE

FAN ERROR

4. TROUBLESHOOTING

ERROR CODE

- This refrigerator uses the BLDC Fan Motor. The BLDC Motor operates with DC 7~12V.
- The F-Fan motor generally runs together with the compressor.

the unit keeps alarming (Buzzer Sound)

4. TROUBLESHOOTING

(Buzzer Sound)

4. TROUBLESHOOTING

TROUBLESHOOTING

This model has a buzzer affixed on the MAIN PCB.
If there is no buzzer sound upon button press, Forced Operation or Door Open, disconnect MAIN PCB and check if the buzzer is damaged or there is any defective soldering.
(If it is not a soldering problem, it is recommended replacing MAIN PCB due to difficulties in repairing)
※ It may not be able to check when it is a closed built-in environment and there is lots of noise around.

light up or partially does

4. TROUBLESHOOTING

Compressor operating and stand by 5 minutes. During this 5 minutes, RPM command signal is not available. It means, even if available RPM command signal is applied to the compressor, it does not work and keep standing by.
Blinking time is 1 second and dwell time is 1 seconds.

LED blinking frequency depending on protecting functions (Inverter PBA)

4. TROUBLESHOOTING

LED blinking frequency depending on protecting functions If the same blinking, After 5 minutes, Follow the Remarks.

various data
3. Relay Section controls the AC Load
4. MAIN → PANEL PCB Operation Control，Sensor and Door Switch signal circuit
5.Fan Motor and Buzzer circuit
6.Main MICOM
7.Damper circuit
8.Filter circuit and Power conversion circuit

PBA Main

Sensor
(COVER CONTROL)

F-Defrost Sensor
(ASSY EVAP)

88