SERVICE MANUAL REFRIGERATION EUROFLEC © ELECTROLUX ZANUSSI S.p.A. Spares Operations Italy Corso Lino Zanussi, 30 I - 33080 PORCIA / PN (ITALY) Fax +39 0434 394096 Publication No.
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CONTENTS 1. Introduction...................................................................................................................................................5 1.1. Presentation .............................................................................................................................................5 1.2. EUROFLEC: total nofrost.........................................................................................................................6 2. Characteristics.........
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1. Introduction 1.1. Presentation The EUROFLEC with exposed condenser is a new combined refrigerator based on the EUROFLEC models, but with different versions produced in the Fuenmayor factory in Spain. The appliance features a single compressor and a total no-frost system. The operating cycles are controlled electronically. A flap-operated mechanical thermostat controls the temperature inside the refrigerator compartment.
1.2. EUROFLEC: total nofrost The EUROFLEC is a total no-frost appliance, and as such its operation is based exclusively on the battery evaporator in the freezer compartment, which cools the air; the fan circulates the air. A duct embedded in foam channels the cold air into the refrigerator compartment, where the flap-operated mechanical thermostat regulates the flow of cold air and thus the temperature inside the refrigerator compartment.
2. Characteristics 2.1. Dimensions and volumes The EUROFLEC models are numbered from 1 to 9 (n° 7 has been eliminated): Model no. Height Width Depth Gross vol. freezer Gross vol. fridge Total gross vol. mm mm mm litres litres litres 1 1950 600 595 94 267 361 2 1800 600 595 126 193 319 3 1800 600 595 94 230 324 4 1800 600 595 157 156 313 5 1650 600 595 94 193 287 6 1650 600 595 126 155 281 8 1750 600 595 94 217 311 9 1950 600 595 126 230 336 2.2.
Settings for refrigerator compartment: Position of thermostat knob stand by* 3 5 7 Cut-in Cut-out +16°C +10°C +7°C +4°C +13°C +7°C +4°C +1°C * In this position, the thermostat does NOT completely blocks the passage of cold air coming from the freezer compartment.
3. Diagrams 3.1 Functional diagram The control system of the EUROFLEC consists of a UIB user interface board and a MB control and power board with the following inputs and outputs: INPUTS: 1. 2. 3. 4. Freezer door switch; NTC sensor on evaporator; NTC sensor in air; Refrigerator door switch (reed element with foam-embedded magnet in door); OUTPUTS: 5. 6. 7. 8. 9.
3.
Legend: 2. compressor; 5. overload cut-out; 9. evaporator defrosting heater; 11. drain duct defrosting heater; 13. refrigerator compartment light; 16. freezer door switch; 24. evaporator fan; 26. safety thermal switches; 28. running condenser; 41. display board (UIB); 41a. control and power board (MB); 56. NTC sensor refrigerator (optional); 57. NTC sensor freezer in air; 59.
4. Components 4.1. Main components 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.
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4.2. UIB Display board The UIB display board is placed inside the refrigerator behind the control panel and contains the push-buttons, the LEDs and the refrigerator door switch (reed element). For the version with ELECTROLUX mark, in the reed element board (B) there are also the two LEDs (red and green) (A) to display the operation of the refrigerator through the hole drilled on the door.
4.3. MB Control and power board The control and power board is placed in the compressor compartment and contains: - A the microprocessor for the control of the appliance; - B the section for obtaining the 18 V of direct current to power the fans; - C the buzzer for the sound advice of the temperature and open door alarms. The advice for temperature alarm has an intermittent long-tone sound, while the advice for open door alarm has a short-tone intermittent sound.
4.4 Foamed connectors seat Inside the freezer compartment, behind the panel of the evaporator battery, there are the foamed connectors where the NTC sensors (A), the defrosting heaters (B), the evaporator fan (C) and the freezer door switch (D) must be connected. 4.5. Evaporator fan The evaporator fan is used to let the cold air circulate in the appliance. The fan is powered with a continuous voltage of 18V.
4.5.1. Operation with door closed When the compressor switches on, the fan switches on too; after the compressor switches off, the evaporator fan continues to operate for 2 minutes and then switches off. As the freezer compartment is cooled only by the cold air ducted in by the evaporator fan, after 30 minutes the fan switches on, even if the compressor is still switched off. Compressor Evaporator fan 4.5.2.
4.5.3. Operation with door opened and compressor switched off If one of the two doors is opened while the compressor is switched off, in the span of 30 minutes during which also the evaporator fan is switched off, this is activated for 2 minutes after the door closes. After 2 minutes, the evaporator fan switches off automatically.
4.6. Defrosting heaters The two heating elements are connected in parallel: - the defrosting heater (250 W) melts the ice which builds up on the evaporator battery. - the drain duct heater (43.5 W) prevents the formation of ice in the drain duct. DEFROSTING HEATER DRAIN DUCT HEATER 4.7. NTC Sensors This appliance is fitted with two NTC sensors, both located in the freezer compartment: - the external (in air) NTC sensor governs the operating cycles of the compressor (switching on and off).
4.10. Evaporator The evaporator fitted to the appliance is located in the freezer compartment and consists of a traditional NOFROST battery. 4.11. Condenser The static exposed condenser is located in the back of the appliance. 4.12. Flap-operated mechanical thermostat The flap-operated mechanical thermostat controls the flow of air into the refrigerator compartment.
5. Operation 5.1. Normal operation The external (in air) NTC sensor in the freezer compartment controls the compressor’s operating cycles according to the cut-in and cut-out temperatures for the selected operating mode (warm, normal or cold). As explained previously, the evaporator fan switches off two minutes after the compressor has stopped; it remains switched off for 30 minutes, and is then switched on again.
6. Control panel a = freezer regulation knob b = “door open” alarm button/pilot lamp c = “temperature” alarm button/pilot lamp d = “rapid freezing” button e = ON/OFF button/pilot lamp f = regulation knob for flap-operated thermostat 6.1. Switching the appliance on and off To switch the appliance on or off, press and hold down the ON/OFF button (e) for at least 2 seconds.
6.2. Door alarm Both doors are fitted with a switch which detects whether they are open or closed. The freezer compartment features a button in the top lefthand corner, while the refrigerator compartment is fitted with an electronic switch, i.e. a reed element fitted to the control board of the control panel detects the presence or absence of the magnet embedded in foam in the centre of the refrigerator door.
6.5. NTC sensors failure When there is a failure in NTC sensors, during normal mode the three LEDs (b), (c) and (d) flash. The appliance is controlled in the following way: failure sensor Evaporator NTC sensor (no adaptivity) Air NTC sensor failure working time First start 6 hours During working latest time before failure controlled by evap. NTC controlled by evap.
7. Service mode Service mode can be utilised to check for faults in the two NTC sensors and to power each of the loads separately in order to check for correct operation. 7.1. Selecting service mode In order to select service mode, it is necessary to press the four buttons (b, c, d and e) simultaneously for at least 4 seconds within 15 seconds after switching off the appliance. To exit service mode, press the same buttons again for at least 2 seconds.
7.3. Separate activation of loads The various buttons can be used to activate and deactivate the compressor, fan and heating elements separately. The corresponding LED remains lit to indicate the load which has been activated. If the loads are not deactivated manually, the following safety procedure is performed: 1. the compressor and the fan will switch off automatically after 4 minutes 2. the heating elements will switch off when the temperature reaches +15°C (end of defrosting cycle) 3.
8. Demo Mode Demo mode is used to demonstrate the operation of the user interface (control panel) without activating the various loads (compressor, fan, heating elements). 8.1. Selecting Demo mode To select Demo mode, press buttons b, d and e simultaneously for at least 2 seconds within 15 seconds after switching the appliance off by pressing the ON/OFF button. When Demo mode is selected, the buzzer sounds four times and the LEDs flash simultaneously four times. 8.2.
9. Accessibility of components 9.1. Refrigerator compartment - remove the panel which covers the thermostat bulb by pushing it first upwards out of its socket.
- remove the four screws which secure the control panel to the cabinet; remove the control panel; - remove the screw which secures the thermostat; EUROFLEC with exposed condenser 29/35
9.2.
9.3. Freezer compartment - remove the two screws of the panel which covers the seat of foamed connectors; - disconnect the heating element of the drain duct; unscrew the panel from the evaporator battery; - remove the two screws on the front panel; pull the battery assembly outwards to remove it from its housing, and lay it gently on the bottom of the cell, taking care not to damage the tubes.
- remove the drain duct (which is pressure-fitted) remove the fan; - raise the evaporator battery slightly and remove the defrosting heater; these operations make it possible to access the thermal cut-outs (1), the evaporator sensor (2), the ambient sensor (3) and the freezer compartment door switch.
9.4. Glass shelves The glass shelves are secured to the guides by plastic tabs. To remove the shelves, it is necessary to move the tabs as shown in detail A. Two tabs, too, secure the shelf on the vegetable drawer. To release and remove the vegetable drawer and glass shelf, it is necessary to rotate the tabs as shown in detail B. 9.5. Air inlets The air inlets through which air returns to the freezer compartment are pressure-fitted. To remove them, simply lever off using a screwdriver.
9.6. Control and power board (MB) - after disconnecting the connectors on the control and power board, unscrew the screws which secure the power board to the cabinet; - to access the control and power board, unhook the lug (1) and remove the housing (2).
10. Main differences between EUROFLEC model and EUROFLEC model with exposed condenser For further information about EUROFLEC model please refer to Service Manual 599348504. Please find below a summary of the main differences between EUROFLEC model (writings in italics) and EUROFLEC model with exposed condenser (with normal writings).
