B-794 (K70475N / K70475NE) SERVICE MANUAL

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1 B-794 (K70475N / K70475NE) SERVICE MANUAL D

2 1. SAFETY PRECAUTIONS Never use the parts of the refrigerator such as kick plate or door as a means of support or step. Do not damage the parts, where the refrigerant is circulating, with drilling or cutting tools. The refrigerant that might blow out when the gas channels of the evaporator, pipe extensions or surface coatings of the product are punctured may cause skin irritations and eye injuries. In case of any failure or during a maintenance or repair work, disconnect your refrigerator s mains supply by either turning off the relevant fuse or unplugging your appliance. Be careful not to pull by the cable when pulling the plug out. DO NOT PLUG IN your appliance before removing all packaging materials and protective transport elements. To prevent horizontal handling and in order to ensure complete distribution of the condenser oil, keep the appliance in upright position for 4 hours before operating. Make sure that the plug is easily accessible. Do not use multi sockets or extension cables. Do not allow blocking of ventilation openings in the product casing or in the built-in structure. Before plugging in the product, make sure that the voltage and frequency values printed on the product rating plate in your appliance conform to the values of the supply power in your house. This rating plate is on the inner left wall of the refrigerator. Dow 20 G R RA We recommend plugging in this product to a socket which is properly switched and fused. The plug of the appliance should be located as to be easily accessible. Warning! The product must always be plugged into a grounded socket. If the molded plug at the end of the power cable of the product does not match with the socket, the plug must be cut and replaced by a suitable one. Dispose of the plug you have cut since a plug with naked cable can cause electric shock when plugged in another socket in the house. Important! As the colors of the wires in the power cable of the appliance might not match with the colour codes defining the terminals in your plug, proceed as follows: 1. Attach the green-yellow or yellow colored wire (ground) to the terminal in the plug which is marked with E, bearing this symbol or is in green and yellow, or only green color. 2. Attach the blue (Neutral) wire to the terminal in the plug which is marked with N or is in black color. 3. Attach the brown (Phase) wire to the terminal in the plug which is marked with L or is in red color. In alternative plugs, a 13-Ampere fuse must be attached to the plug or the adaptor in the mains plug box.

3 2. TECHNICAL SPECIFICATIONS TABLE Double evaporator and double fan cooling system are used in new NO-FROST refrigerators. Freezer and fresh food compartments are cooled by independent fans and evaporators. MODEL DIMENSIONS (HxWxD) (cm) CLIMATE CLASS PACKAGED UNPACKAGED K70475N 198x76.5x77 191x70x68 SN-T POWER (at 25 C ambient temperature) CLASS A+ CONSUMPTION (kwh/year) 394 STAR CLASS 4 GROSS 475 VOLUME (lt) NET (FRZ) 125 NET (FF) 327 PRESERVING TIME DURING POWER FAILURE (hours) 24 FRESH FOOD FREEZING CAPACITY (kg/24 hours) 6 OPERATING NOISE LEVEL (dba) 40

4 3. PARTS OF REFRIGERATOR FREEZER COMPARTMENT SHELF 2. ICEMATIC 3. ICE STORAGE CONTAINER 4. TEMPERATURE SETTING BUTTON 5. ADJUSTABLE GLASS SHELVES 6. BOTTLE SHELF 7. ILLUMINATION GLASSES 8. ODOUR FILTER 9. SNACK COMPARTMENTS 10. CRISPER 11. FREEZER COMPARTMENT DOOR RACK 12. EGG TRAY 13. FRIDGE COMPARTMENT DOOR RACKS 14. SLIDING STORAGE CONTAINERS 15. FLAP COVER 16. LARGE DRAWER 17. SMALL DRAWER 18. WIRE SHELF 4. INSTALLATION

5 4.1 Handling Instructions 1. This appliance should be transported only in upright position. Delivery package should not be damaged during transportation. 2. If the appliance is to be transported in horizontal position, it should only be leaned towards right-hand side when you are facing the front of the appliance. After bringing it to upright position, it should be left for at least 4 hours without being operated in order to have it settled. 3. Failure to obey above instructions may result in damage on the appliance. In case of failure to obey these instructions, producer shall not be held responsible. 4. The appliance must be protected against rain, humidity and other atmospherical effects. 5. Pay attention not to damage your floor, the pipes, wall coverings and etc., when installing your appliance. The appliance should not be carried by pulling from the door or door handle. 6. Discharge the water in the drain tray before moving the appliance. For detailed information, see Cleaning and Maintenance section in the operation manual. Do not sit or climb on to the appliance since the design of the appliance is not suitable for such actions. You may injure yourself or damage the appliance. ow 7 A R IMPORTANT: To prevent cutting or damaging the power cable, make sure that the cable is not pinched under the appliance during and after moving it. 4.2 Installation Instructions 1. Volume of the room where the product will be installed should not be less than 10 cubic meters. 2. Do not install the appliance in a cold room where the temperature may fall below 0 C at nights and/or especially in winter season. This refrigerator/deep freezer has been designed to operate in ambient temperatures between 0 C and +43 C. For this reason, in case of installing the appliance in a cold place without heating facility (e.g. garage outside the house), it will not operate and the freezer compartment will get warmer which will end up with decreased preserving times for frozen foods. 3. Do not install the appliance near ovens or radiators or under direct sunlight since they will cause the appliance operate more difficultly. In case of placing the appliance near a heat source or freezer, make sure that the following minimum clearances are provided. 50 mm (2") from ovens 300 mm (12") from radiators 25 mm (1") from freezers 50 mm (2") from wall 4.3 Floor Balance Adjustment If your refrigerator is unbalanced; You can balance your refrigerator by turning the front legs of it as illustrated in the figure. The corner where the leg exists is lowered when you turn in the direction of black arrow and raised when you turn in the opposite direction. Taking help from someone to slightly lift the refrigerator will facilitate this process. 5. ELECTRICAL SYSTEM ELEMENTS

6 Button Interior Illumination Sensor Control card box

7 Thermic and Relay Compressor Fan motor Capacitor Fan motor Ionizer Fan motor Evaporator sensor Thermal fuse 7 Air sensor Defrost heater CHANGING THE FRESH FOOD ILLUMINATION LAMPS AND LED CARD Discharge heater

8 AGOR Illumination lenses are engaged by 8 tabs. There is no screw connection. Insert the tip of a flat tip screwdriver to a point close to the upper section, pray to separate the lens and pull it out to release the tabs from their slots. Bulb is changed manually. (Alternative 1 for illumination) Led illumination card is removed by removing one screw. Led card is changed by removing the socket connection manually. (Alternative 2 for illumination) Insert the 4 tabs on the long edge of the lens into their slots and press the tabs on the other long edge to install the lens.

9 REMOVING THE CARBON ODOUR FILTER A R Carbon odour filter casing is engaged by 2 tabs. There is no screw connection. Insert a narrow flat tip screwdriver into tab holes to flex the tabs. Carbon filter is engaged to the casing by 2 tabs. Flex the casing to remove the filter.

10 Do 01 Follow the same order to install the carbon odour filter onto its seating on the rear wall cover. CHANGING THE MAIN CARD Main card box is located on the upper wall of the refrigerator. Cover is connected by 1 screw. Cover of the card box can be removed with Phillips screwdriver.

11 Do Alaska electronic card is used in products with display (K70475NE). Power supply card will also be used for white led illumination alternative. Both cards are secured with 1 screw. Kardelen electronic card is used in products without display (K70475N). Card is secured with 1 screw. RA ACCESSING THE COMPRESSOR, TERMINAL GROUP, CONDENSER, FAN AND EVAPORATOR CONTAINER AREA Plastic rear cover is secured with 3 screws and 8 tabs. Remove the screws to take the cover out.

12 REMOVING THE DISPLAY GROUP a) Sheet door model: AG Arçelik display is new. Current displays will be used in Beko and other brands. There are slots on the side of the display frame to insert the tip of the flat screwdriver. Insert the screwdriver into these slots to remove the display. 17 b) Glass door model: The display group in these products is mounted as assembled like a cassette by driving into the door from the opening on the upper cover of the door. The display group is serviced as shown in the picture. Plastic body and the display board will be serviced as assembled.

13 To remove, the display cover connected on the upper cover of the door by means of a screw will be detached. The display group then will be pulled out from the opening on the cover. The socket connections will be disconnected to complete the dismantling process

14 REMOVING REED SWITCH MAGNET LOCATED IN THE UPPER SECTION OF THE DOOR There is a magnet cover on top of the upper door, and there are slots left to the side of cover where edge of flat-tipped screwdriver can enter. Magnet cover can be removed from its slot from these covers by means of screwdriver to access the magnet G RA REMOVING THE FRESH FOOD EVAPORATOR COVER Evaporator cover is secured with 11 tabs and 2 screws.

15 Do Remove the 2 plugs to access the screws. Use a Phillips screwdriver to remove the screws. Insert a flat tipped screwdriver from the side of the cover, pray the cover to grab it and pull it out to release the tabs. Fan, fan motor, fan motor socket, ionizer and its socket are revealed.

16 REMOVING THE FREEZER EVAPORATOR COVER First, you must remove the frame of icematic. Frame is secured with 1 screw to the side wall and 2 screws to the upper wall. Remove the 3 screws with a Phillips screwdriver. Evaporator cover is secured with 6 tabs and 2 screws. Remove the screws and pull the cover by hand to take it out. Evaporator and its heater, fan and fan motor, thermal fuse, drain heater, and their sockets are revealed when the cover is removed.

17 REMOVING THE POTENTIOMETER CARD Potentiometer box is secured with 1 screw. Use a Phillips screwdriver to remove the box. When the box is removed, potentiometer card and socket is revealed. 6. COOLING SYSTEM ELEMENTS Compressor Coolant gas circulation is enabled by the compressor. Electric supply is made via a protective thermic. Thermic disconnects the electric circuit and protects the compressor in the event of excess current and temperature. Auxiliary winding is fed through the PTC relay and is always enabled while the compressor is running. Compressor name Cooling Capacity COP Refrigerant Voltage / Frequency Thermic Relay Run Capacitor Max. Output Temperature Regime Output Temperature K70475 N / K70475NE MTS 170 MT (S ) 170 kcal/h 1.70 W/W R600a V / 50 Hz 4TM189NFBYY 8EA 19 E61 Sensata 5 uf 135 C 120 C

18 Freezer Compartment Fan Motor AGO It is mounted on the inner body of refrigerator behind the rear cover of evaporator. It ensures circulation of the freezer compartment air in the freezer compartment by passing it continuously over the evaporator. Manufacturer Firm Voltage Range Power SHUNG SHING V/AC, CCW 4.4 W Fridge Compartment Fan Motor It is mounted on the inner body of refrigerator behind the rear cover of the fridge compartment evaporator cover. It ensures circulation of the fridge compartment air in the fridge compartment by passing it continuously over the evaporator.

19 Manufacturer Firm Voltage Range Power SHUNG SHING V/AC, CCW 4.4 W Condenser Fan Motor It is located at the bottom of the cabin. It prevents excessive heating of the condenser and drops condensation pressure to increase the efficiency of the fridge. It is connected parallel to the compressor, runs when the compressor starts and stops when it stops. Manufacturer Firm Voltage Range Power SHUNG SHING V/AC, CCW 10 W Sensors Its resistance decreases as the temperature rises. Sensors on the refrigerator body detect the temperature of their surrounding area and transmit this to the electronic control card.

20 o Freezer Compartment Sensor It detects the temperature in the freezer compartment and transmits this to the microprocessor. Values taken from this sensor are compared with the cut-in and cut-out values of the temperature set for the freezer compartment to run or stop the compressor and the freezer compartment fan motor. Fridge Compartment Sensor It detects the temperature in the fridge compartment and transmits this to the microprocessor. Freezer Compartment Defrost Sensor

21 It is at the capillary outlet on the freezer compartment evaporator. It detects the temperature on the evaporator and transmits this to the microprocessor. Defrost is terminated according to the temperatures received from this sensor. Freezer Compartment Defrost Heater The heater under the freezer evaporator is activated and deactivated by the electronic card at times of defrost. Thus, it periodically defrosts icing accumulated on the evaporator. Power Operating Voltage 150W 220V Freezer Compartment Drain Heater It is enabled during defrost in order to prevent the snow accumulating on the freezer compartment evaporator from freezing again in the drain channel after it has melted, and also to melt the snow and ice particles that may fall from the evaporator. 7 Power Operating Voltage 30 W 220 V

22 Thermal Fuse It is located on the evaporator. It cuts the current to the heater to deactivate the defrost heater in order to prevent the defrost heater remain activated continuously and cause damage on the refrigerator, environment and foods inside. Thermal fuse is disposable and therefore it must be replaced after it is blown. Type 250V / 10A / 72 C PTC Relay

23 Its resistance increases as the temperature rises. It activates the auxiliary coil of the compressor to ensure first startup of it. Manufacturer SENSATA / ARYLUX Arçelik code 8 EA 19 E61 Thermic It is a component that opens the circuit when heated. It opens the circuit at a certain temperature and cuts the current to the compressor in order to protect the compressor coils against excessive heating. When the temperature of the compressor drops below a certain value, it re-completes the circuit to operate the compressor. Manufacturer Production code Reaction Time Electrica 4TM189NFBYY 5-15sec Ionizer Ionizer cleans the air in the FF compartment from bacteria. Negative ions stick on the bacteria and sediment them. Bacteria settled during defrosting are thrown off the refrigerator. It is operated by the microprocessor. Manufacturer Production Code Input voltage Power Output voltage Input current (min) Negative ion output Approval Fu Fong FA1-7-0 (AC220V) AC220 ~ 240V/50-60Hz 0.8W (Maximum) 0.3W (Minimum) -5.9KV ~ -7.0KV (1GΩ) 1.3mA 2,000,000 ions/cc (minimum) VDE Door Buttons D /2017 RA Freezer compartment and fridge compartment door buttons are located on the plastic side walls in the body of the freezer compartment and fridge compartment. Freezer compartment button is normally a closed circuit. When the freezer compartment door is opened, it is short circuited and a signal goes to the card. Thus, the fan stops if it is running. If necessary, it runs again when the door is closed. Fridge compartment button is also a normally closed circuit. When the fridge compartment door is opened, contact is short circuited and a signal goes to the card. Thus, illuminations are activated and the fan stops if it is running. When the door is closed, illuminations are deactivated and the fan starts running if necessary. If any one of the freezer compartment door and fridge compartment door is left open more than 60 seconds, a door open warning signal is heard.

24 Manufacturer Production code DEFOND CPV NC O A Illumination Light and Bulb Holder o Fridge Compartment/Freezer Compartment Illumination Light 1 piece of E14 type 25W/220VAC bulb is used for the illumination of the fridge compartment and 2 pieces of the same bulb are used for freezer compartment. The bulbs are activated by the door buttons when the fridge and freezer compartments are opened. Freezer compartment illumination only exists in models D70500NE and D70500N. o Bulb Holder It is used to fix the E14 type 25W/230VAC bulb. Main Indicator Card 3 different displays will be used. ARÇELİK

25 BEKO GRUNDIG OTHER BRANDS Grundig electronic Control Card (K70475NE)

26 Characteristics of the card and the components connected to the card are explained below: Control card: It is an Alaska control card. Its properties are given below. A O A Buzzer: It is for door open warning alarm, Display connector: It is used to provide connection with the display card, Sensor connector: It is used to provide connection with the sensors, Power connector: It is used to connect the control elements (compressor, Frz fan, ff fan, ioniser, frz eva heater, ff heater, FF door, FRZ door, phase and neutral), Driver circuit elements: These are triacs that control cooling system elements (compressor, frz fan, ff fan, ionizer, frz heater, and ff heater), Serial communication connector (On the PCB):

27 I/O Table I/O I/O type I/O name Connector name and pins Freezer Air sensor- Sensor connector Analog (LV) Freezer Eva sensor Molex INPUT Fridge Air sensor (10 pins) Fridge Eva sensor Line D w Neutral Power connector 1 FRZ Door Molex FF Door (12 pins) 220V AC A Compressor FRZ FAN FF FAN OUTPUT FRZ Defrost Heater FF Heater Ionizer Serial clk Serial_data Display connector DISPLAY OE Molex OUTPUT Button (7 pins) VCC GND RX I/O Serial com TX Edge Connector GND (8 pins) VCC

28 Mechanical Control Cards (D70500N / D70465N / D70460N / D70430N) Settings card (Potentiometer card) Common,Freezer Sensor,Pot Grounding Terminal Topraklama terminali HW Rev No: G02_B01_T01 Hole Delik Hole Delik Freezer Sensor Pot Stock No: POT Card Name KARDELEN POT CARD KARDELEN POT CARD KARDELEN POT CARD HW Features MURATA SMD NTC, Grounding exists EPCOS WIRED NTC, Grounding does not exist EPCOS WIRED NTC, Grounding exists Electronic control card DDDDDDBu zzer Heater 2 Programming connector Heater 1 Compressor FF Sensor FF Sensor Def Heater Phase Neutr al HW Rev No: G05_B01_T01 Buzzer Buzzer /2 Defrost Sensor Defrost Sensor Common Frz Sensor Pot

29 7. OPERATING PRINCIPALS Cooling Cycle (D70430N, D70460N, D70465N, D70500N) Cooling Algorithm Cooling is performed with compressor and fans. Freezer compartment fan runs together with the compressor. Cooling compartment fan and compressor is activated or deactivated according to the FF air sensor. Minimum stop time of the compressor is 6 minutes. w If it is under the operating rate of 30%, then the heater and fan is activated during stoppages. Heater stops when the compressor is activated. FF fan operates depending on the conditions. Forced Defrost In order to cut-in during every stoppage period, it waits for the ff air sensor to reach the cut-in value and for the ff eva sensor to reach +3 C. Cut-out is performed depending on the the FF sensor. If the compressor runs continuously for 240 minutes, frz sensor will stop until the cut-in value (+3 C). Fan is activated during stoppage. Low Ambient If the compressor does not operate for 130 minutes, it will be activated for 15 minutes. (Low Ambient) R First operation/power failure If the defrost sensor temperature is at or above 5 C when the refrigerator is energized, this is called first operation. If this temperature is lower than 5 C it is called "power failure". If it is a power failure after the production test, compressor will be activated after the stoppage time of 6 minutes when necessary. If it is first operation, compressor will be activated immediately.

30 FRZ/FF Temperature Setting Temperature setting is made by the potentiometer on the cart in FF. Refrigerator is not equipped with an Off position. Parameter List Set Cut-out (FF sensor) Cut-in (FF sensor) Pot angle ( ) 1 7 C 6.3 C C 5.3 C C 4.3 C C 3.3 C C 2.4 C 0-50 Defrost Algorithm RA Defrost is performed by a heater in order to avoid the decrease in refrigerator's cooling performance due to the snow and ice accumulating on the evaporator. Melting is performed on basis of real time. Defrost is performed after 25 hours of real time. Defrost does not exceed a certain period in order to preserve the food and protect the refrigerator during defrost (60 minutes). Defrost is aborted after 60 minutes or when the defrost sensor temperature reaches +10 C. If the doors of the refrigerator are not opened for 14 hours, then the defrost time deferred by 50 hours in real time. This is called door closed defrost. Defrost is performed for 5 minutes depending on the time. Refrigerator returns to normal operation when doors are opened. If the 25 hours of real time defrost period is over when the refrigerator door is opened, then the defrost starts 1 hour after closing the door. If the 25 hours of real time defrost period is not over when the doors are opened, refrigerator waits for 25 hours of real time to elapse in order to start the defrost. Precool will not be performed. A certain amount of time is allowed for the water droplets that occur on the evaporator to fall down (water drainage) (5 minutes). Then the compressor is activated. Defrost After Power Failure or During First Operation Compressor run time is recalled after a power failure. Parameter List Real time that should elapse for defrost Water drain time Defrost sensor temperature to abort defrost Max. defrost time 25 hours 5 min +10 C 60 min

31 Opening of the door When the user opens either of the doors, the inner illumination of the relevant door turns on (only valid for FF compartment), the fan stops, and the audio "door open" alarm is heard after a certain period of time (60 seconds). This alarm warns the user that he/she has kept the door open longer than required. This is an audio alarm. Warning ceases when the door is closed. Otherwise, audio warning continues. Operation after power failure After a power failure, the door starts to operate as if it is newly opened. Parameter List G RA Audio warning start time after the door is 60 opened (sec) Door open alarm buzzer ON time (msec) 500 Door open alarm buzzer OFF time (msec) 500 FF heater Activated when the FF air sensor is 0 C, deactivated when it is 1 C. FF Fan / 7 Fan will operate continuously during normal operation. However, the fan will stop (for 15 min) in low ambient operating mode, and then will start again. If the doors are not opened for 14 hours, FF fan only operates when the compressor is activated and stops when the compressor is deactivated until the door is opened again. If the low ambient algorithm is activated during the period of 14 hours in which the doors are not opened, it will operate as in the low algorithm. FF stops while the compressor runs for 15 minutes ; fan operates in other times. During first operation, FF fan starts 10 minutes after the compressor is activated.

32 Operation after power failure FF fan operates as in the normal mode after a power failure. Tests Run Time Test (Sensor error) If the Power is ON in a sensor error, none of the components are driven for 15 min. If air sensor error exists If air sensor error does not exist If eva sensor error exists Compressor operates for 20 min and stops for 40 min. Cut-out / cut-in are performed depending on the set value of air sensor. If eva sensor error does not exist Cut-in and cut-out are performed on basis of the FF eva sensor. Cut-in: +5 C and Cut-out -20 C. OK Heater remains active for 20 min in a defrost sensor failure.. Cooling Cycle (K70475NE) Electronic Control Board G R R The control board is placed in the plastic box towards the rear wall on the upper plate of the refrigerator. Connectors:

33 KN1 : 1 : Phase KN1 : 2 :Neutral KN1 : 3 : Compressor KN1 : 4 : Defrost heater KN2 : 1 : FF heater KN2 : 2 : Frz Fan motor KN2 : 3 : FF Fan motor KN2 : 4 : Ionizer KN2 : 5 : Illumination KN3: Sensor Socket KN4: Display socket EK3 CARD In addition to control card, it is used for driving 12VDC illumination with 12VDC FF fan (Square) located on the fridge. Display 1. Quick Cool Button 2. Quick Cool Icon (illuminated when quick cool is activated) 3. Fast Freeze Button 4. Fast Freeze Icon (illuminated when fast freeze is activated) 5. Fridge Compartment Temperature Setting Button

34 6. Fridge Compartment Temperature Indicator 7. Eco-Extra Function Button 8. Eco-Extra Icon (illuminated when Eco-Extra is active) 9. High temperature warning icon 10. Economy Mode Icon (illuminated when fridge compartment temperature is set to +8 and freezer compartment temperature is set to -18) 11. Display Off Button 12. Display Off Icon (this icon is illuminated only when display is off) 13. Key Lock Button (activated when pressed for 3 sec) Dow 14. Key Lock Icon (Illuminated when Key Lock is activated) 15. Fridge Compartment Temperature Indicator 16. Freezer Compartment Temperature Setting Button 17. Vacation Mode Button GO 18. Vacation Mode Icon (illuminated when vacation mode is activated) REFRIGERATOR OPERATION PRINCIPLE FF Defrost FF Defrost Decision: 1. Depending on the number of compressor cycles 2. Depending on the defined maximum operation time of compressor 3. If the compressor constantly operates for at least 120 minutes, FF Defrost will start when FF Eva sensor is colder than -27C. Algorithmic Behavior: FF Fan Compressor /FRZ FAN Parameter 4 360min Parameter Operates Does not operate End of Function: 4. FF defrost ends when FF Eva sensor reaches +4C. 5. Maximum FF defrost time is 130 minutes.

35 Freezer Defrost FRZ Defrost Decision Total operation time of FRZ FAN Real time for defrost Algorithmic Behavior: FF Fan Compressor /FRZ FAN Frz heater End of Function: 1. FRZ heater stops when Frz Eva sensor reaches +10C. 2. FRZ Heater Maximum operation time 3. After the heater stops, 5 minutes of time is allowed for water drainage. Parameter 11 hours 26 hours Parameter Operates Does operate Operates Parameter 60 minutes not FF Fan Operation Conditions FreshFood ON / OFF condition: Compressor ON Compressor OFF FF Air >= FF Air <= FF Air >= FF Air <=

36 cut-out cut-out cut-in cut-out Decision Operates Stops Operates Operates Notes: 1. It stops when FF Door is open, 2. When the compressor is not operating, FF Fan operates to ensure air circulation. Frz Fan Operation Conditions Freezer Fan can be ON when: - Compressor ON Freezer Fan can be OFF when: Notes: o G - Compressor OFF 1. It starts to operate if Frz Eva sensor is colder than -5C or after maximum 5 minutes. 2. When freezer fan operates, it will not stop until the compressor stops. 3. It stops when FRZ Door opens. FF heater Operation Conditions FF Heater turns ON when: - FF Air <= cut-in FF Heater turns OFF when: - FF Air >= cut-out Compressor Operation Conditions Compressor turns ON when: - FRZ Air >= cut-in - FF Air >= cut-in Compressor turns OFF when: - Defrost status - FF Air <= cut-out and Frz Air <= cut-out and frz and ff defrosts

37 Notes: Compressor pause time = 6 minutes. Ionizer Operation Conditions Ionizer turns ON / OFF when: If FF door is not opened after the product is energized, Ionizer starts running 4+8 hours later. If FF doors are opened and closed after the product is energized, Ionizer starts running after the FF door is closed. It does not run when FF door is open. Ionizer runs together with FF Fan for 30 minutes. If FF Fan stops when Ionizer is running before 30-minute time is over, this period is completed as 30 minutes in the next operation of FF Fan. If FF door is not opened/closed, Ionizer will start every 8 hours. In cases where FF door is opened/closed, there must be minimum 2 hours between two consecutive ionizing periods. Note: operate. D w 7 A O When the compressor is operating, door is open and FF Fan is not operating, ionizer will not Quick Freeze When the Quick Freeze button is pressed, the snowflake next to Freezer segment illuminates. The function can be terminated by pressing the same button again. The function is terminated when freezer set value is changed. Cooling components operate according to certain cut-in cut-out values while the function is active. Quick Cool When the Fast Freeze button is pressed, the snowflake next to Fridge segments illuminates. The function can be terminated by pressing the same button again. The function is terminated when fridge compartment set value is changed. If the vacation mode is selected when the function is active, then the function will be cancelled. Cooling components operate according to certain cut-in cut-out values while the function is active. Eco-Extra When the eco-extra button is pressed, eco-extra icon illuminates.

38 The function can be terminated by pressing the same button again. It will not terminate otherwise. If the following conditions are met, the Freezer compartment set value will operate as if set to -18, and the economy icon will illuminate. - Doors (all Doors) will not open for 6 hours - Freezer compartment set value will be either -19, -20, -21, -22, -23 or -24 (excluding -18). - It illuminates solidly at -18 degrees (if fast freeze function is not active). - Quick freeze function will not be active - Quick cool function will not be active While eco-extra function is active, economy icon will go off in the following conditions. - When quick cool function is selected - When quick freeze function is selected - When doors are opened If defrost is started while the function is active, pre-cool is made according to the eco-mode during pre-cool. It functions as if the key is newly pressed after a power failure. Vacation Mode Key Lock Dow 0 7 A When vacation button is depressed, vacation icon is illuminated and '- -' appears in the FF display. The function can be terminated by pressing the same button again. Function is terminated by pressing the FF set button. When the key lock button is pressed and hold for 3 sec, the key lock is activated, and the key lock icon illuminates. While the function is activated, no key function is activated and key pressing warning cannot be given from the buzzer. Within the first 30sec after powering up, service test can also be conducted while the key lock is active. When the service test is started, key lock is cancelled. When Key Lock is active, key lock will blink quickly 3 times when any key is pressed. While display OFF is active, if key lock is activated, key lock icon is shown. (also when the other segments go off after 5min) Function is cancelled by pressing the Key Lock button for 3sec. NF COMBI SERVICE and DEALER MODE NF Combi Service Test

39 The display board we use in the refrigerator has a six-key system. Set values are shown in the display. Within the first 30 seconds after the refrigerator is energized, it can be taken to the Service Mode by simultaneously pressing Quick Cool and Quick Freeze buttons for 2 seconds. Service Mode (2 sec) Following steps are applied respectively in the Service Mode. Step 1: Buzzer will be active for a short time. After that, LEDs will illuminate for 0.5 sec and go off for 0.5 sec.

40 Step 2: When any button is pressed, Step 1 is terminated. Software version and revision info are shown on the display as follows. Note: Updated version revision should be checked from the technical drawing. Step 3: When any button is pressed, w all sensors are shown on the display in a loop with 1 sec intervals. View 1 (FF Eva Sensor): View 3 (Defrost Sensor): View 2 (Freezer Air Sensor): View 4 (FF Air Sensor): Errors: Open Circuit Error: If value read from ADC is higher than 245, it means that there is an open circuit condition, and in the display this is shown by "O" and "P" (Open Circuit). "!" icon flashes and gives alarm. Meanings of letters shown in the second segment are as follows: E: FF Eva Sensor r: Freezer Air Sensor d: Defrost Sensor R

41 Step 4: It will switch to component operation step when Display Off button is pressed. When the Eco-Fuzzy button is pressed, components can be selected in forward direction, and when Quick Cool button is pressed, components can be selected in reverse direction. The selected component can be activated/deactivated with Frz Set button. When "Co" is made "1", the compressor is operated. When "Co" is made "0", the compressor is stopped. Component selectionreverse FF Fan and Frz Fan operation with single button D Closing active components Component opening/closing Switching to component drive step Component selectionforward Step 5: If "re" is made "1", defrost heater will operate. When "re" is made "0", defrost heater will stop. Step 6:When "Io" is made "1", ionizer will operate. When "Io" is made "0", ionizer will stop. Step 7: When "FO" is made "1", FF heater will operate. When "FO" is made "0", FF heater will stop. Step 8: When "FF" is made "1", FF fan will operate. When "FF" is made "0", FF fan will stop. Step 9: When "rf" is made "1", FRZ fan will operate. When "rf" is made "0", FRZ fan will stop. Termination of Service Mode: Service mode is finalized after 30 minutes or after a power outage. Notes: Sensor display step can be activated by pressing Display Off button twice. While none of the components are activated, pressing Alarm Off button will activate FF Fan and Frz Fan together.

42 Switching to NF Combi Dealer Mode Step 1. Key lock is activated by pressing Display Off button for 3 seconds within 30 sec after energizing the refrigerator. If the following are pressed -(Fridge Set) -(Display Off) (Eco Fuzzy) -(Freezer Set) (Quick Freeze) respectively (Quick Fridge) buzzer will be active for a short period, and dealer mode is started. During dealer mode, "!" icon lights continuously. Related icons light up as the display buttons are pressed, however no cooling is made. If the door is left open, door open alarm will be given. Exit from the Mode: Dealer mode is terminated when power is cut and restored.

43 ERROR CODES FRZ Air Sensor Error: On the display, E and 0 illuminate alternately with set values and warning flashes; warning is given by the buzzer. The compressor is operated in ON mode for 35min, and OFF for 25min. Defrost Sensor Error: On the display, E and 1 illuminate alternately with set values and warning flashes; warning is given by the buzzer. The heater operates for 20min. in freezer defrost state. FF Air Sensor Error: On the display, E and 3 are illuminated alternately with set values and warning flashes; The compressor is operated in ON mode for 35min, and OFF for 25min. Heater Failure: On the display, E and 4 illuminate alternately with set values and warning flashes; warning is given by the buzzer. FF Eva Sensor Error: On the display, E and 2 illuminate alternately with set values and warning flashes; warning is given by the buzzer. High Temperature Error: Warning icon is illuminated on the display. Set values continue to be displayed.

44 ELECTRICAL CIRCUIT DIAGRAM 44

45 TROUBLESHOOTING AND FAILURE IDENTIFICATION Please review this list before calling the service. To do so will save you time and money. This list includes frequent complaints that are not arising from defective workmanship or material usage. Some of the features described here may not exist in your product. Complaint Possible Reason Solution Is the refrigerator properly plugged Insert the plug to the wall socket. The refrigerator does Is the fuse of the socket which your not operate refrigerator is connected to or the Check the fuse. main fuse blown out? Compressor is not running Protective thermic of the compressor will blow out during sudden power failures or plug-out plug-ins as the refrigerant pressure in the cooling system of the refrigerator has not been balanced yet. The fridge is in defrost cycle. Your refrigerator will start running approximately after 6 minutes. Please call the service if your refrigerator does not startup at the end of this period. This is normal for a full-automatically defrosting refrigerator. Defrosting cycle occurs periodically. The fridge is running frequently or for a long time. A R R Your refrigerator is not plugged into the socket. Are the temperature adjustments correctly made? There is a power failure. Your new refrigerator may be wider than the previous one. The ambient room temperature may be high. The refrigerator might have been plugged in recently or might have been loaded with food. Large amounts of hot food might have been put in the refrigerator recently. Doors might have been opened frequently or left ajar for a long time. Freezer or fridge compartment door might have been left ajar. Dow /201 Make sure that he plug is inserted tightly to the wall socket. Call your electricity supplier. This is quite normal. Large refrigerators operate for a longer period of time. This is quite normal. Cooling down of the refrigerator completely may last for a couple of hours longer. Hot food causes the refrigerator to run longer until they reach the safe storage temperature. The warm air that has entered into the refrigerator causes the refrigerator to run for longer periods. Open the doors less Check if the doors are tightly closed. 45

46 Complaint Possible Reason Solution The fridge is running frequently or for a long time. The refrigerator is adjusted to a very low temperature. Door seal of the fridge or freezer may be soiled, worn out, broken or not properly seated. Adjust the refrigerator temperature to a warmer degree and wait until the temperature is achieved. Clean or replace the seal. Damaged/broken seal causes the refrigerator to run for a longer period of time in order to maintain the current temperature. The temperatures are too low Freezer temperature is very low while the fridge temperature is sufficient. The freezer temperature is adjusted to a very low temperature. Adjust the freezer temperature to a warmer degree and check. Fridge temperature is very low while the freezer temperature is sufficient. The fridge temperature is adjusted to a very low temperature. Adjust the fridge temperature to a warmer degree and check. Food kept in the fridge compartment drawers are freezing. The fridge temperature is adjusted to a very low temperature. Adjust the fridge temperature to a warmer degree and check. The temperatures are too high. Temperature in the fridge or freezer is very high. o 01 A A The fridge temperature is adjusted to a very high degree. Fridge adjustment has an effect on the temperature of the freezer. Doors might have been opened frequently or left ajar for a long time. The door might be left ajar. Change the temperature of the fridge or freezer until the fridge or freezer temperature reaches to a sufficient level. Warm air rushes into the fridge or freezer when the doors are opened. Open the doors less frequently. Close the door completely. Large amounts of hot food might have been put in the refrigerator recently. Wait until the fridge or freezer reaches the desired temperature. The refrigerator might have been plugged in recently. Cooling down of the refrigerator completely takes time because of its size. 46

47 Complaint Possible Reason Solution Noise The operation noise increases when the refrigerator is running. Vibrations or noise. The operating performance characteristics of the refrigerator may change according to the changes in the ambient temperature. The floor is not even or it is weak. The refrigerator rocks when moved slowly. The noise may be caused by the items put onto the refrigerator. It is normal and not a fault. Make sure that the floor is level, strong and capable to carry the refrigerator. Such items should be removed from the top of the refrigerator. There are noises like liquid spilling or spraying. Liquid and gas flows happen in accordance with the operating principles of your refrigerator. It is normal and not a fault. There is a noise like wind blowing. Air activators (fans) are used in order to allow the refrigerator to cool efficiently. It is normal and not a fault. Water/condensation/ice in the refrigerator. G RA Hot and humid weather increases icing and condensation. It is normal and not a fault. Condensation on the inner walls of refrigerator. Dow /2 The doors are ajar. Doors might have been opened very frequently or they might have been left open for a long time. Make sure that the doors are closed completely. Open the door less frequently. Water/condensation/ice on the outside of the refrigerator. Humidity occurs on the outside of the refrigerator or between the doors. Bad odor inside the refrigerator. The weather may be humid. Inside of the refrigerator must be cleaned. Some containers or packaging materials might be causing the smell. This is quite normal in humid weather. When the humidity is less condensation will disappear. Clean the inside of the refrigerator with a sponge, warm water or carbonated water. Use a different container or different brand packaging material. The door(s) is (are) not closing. Crispers are stuck. Opening and Closing of the Doors Food packages may prevent the door's closing. The refrigerator is probably not completely vertical on the floor and it might be rocking when slightly moved. The floor is not level or strong. The food might be touching the ceiling of the drawer. Replace the packages that are obstructing the door. Adjust the elevation screws. Make sure that the floor is level and capable to carry the refrigerator. Rearrange food in the drawer. 47