Electrolux FROST REFRIGERATORS with ERF2021 electronic Service Manual

Refrigeration
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© ELECTROLUX HOME PRODUCTS S.p.A.
Spares Operations Italy
Corso Lino Zanussi, 30
I - 33080 PORCIA / PN (ITALY)
Fax +39 0434 394096
Publication no.
599 37 38-00
051031
ITZ/SERVICE/AA
SERVICE MANUAL
REFRIGERATION
PARTIAL NO
FROST
REFRIGERATORS
with
ERF2021
electronic
FACTORY: HUY

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  Summary of Contents for Electrolux FROST REFRIGERATORS with ERF2021 electronic

  • Page 1 SERVICE MANUAL REFRIGERATION PARTIAL NO FROST © ELECTROLUX HOME PRODUCTS S.p.A. Publication no. REFRIGERATORS Spares Operations Italy 599 37 38-00 with Corso Lino Zanussi, 30 051031 ERF2021 I - 33080 PORCIA / PN (ITALY) ITZ/SERVICE/AA electronic Fax +39 0434 394096...
  • Page 2 PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 2/41...
  • Page 3: Table Of Contents

    10.1. Battery evaporator ............................ 34 11. ACCESSIBILITY TO CONTROL PANEL ....................... 38 12. TROUBLESHOOTING ............................ 39 12.1. Excessive ice formation on the battery: ....................39 12.2. Failed defrosting: ............................39 13. DISPLAY SYMBOLS ............................40 PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 3/41...
  • Page 4 PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 4/41...
  • Page 5: Introduction

    1. INTRODUCTION This manual describes the Partial No Frost Refrigerators with ERF2021 electronic produced in the Nyíregyháza factory called HUY. These models feature: Partial No Frost (no frost freezer, static refrigerator) Free standing single-compressor electronic controls (electronic board ERF2021) liquid crystal display (LCD)
  • Page 6 The evaporating circuit consists of cold module (freezer compartment); tube evaporator (refrigerator compartment). Key: A = control panel B = cooler compartment C = cold module D = No Frost freezer compartment PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 6/41...
  • Page 7: Air Flow

    The cold produced by the battery evaporator in the freezer compartment, is distributed by the fan C placed behind the cold module. AIR FLOW In case of door opening the fan stops. To simulate the door closed, press the button of the freezer door. PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 7/41...
  • Page 8 PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 8/41...
  • Page 9: Refrigerator Circuit

    3. REFRIGERATOR CIRCUIT Key: 1. compressor; 2. condenser; 3. anti-condensation coil; 4. dehydrator filter; 5. capillary; 6. battery evaporator (freezer compartment); 7. tube evaporator (cooler compartment); 8. exchanger. PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 9/41...
  • Page 10: Electric Wiring

    4. ELECTRIC WIRING (check the specific diagram for each model!) PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 10/41...
  • Page 11 28. running capacitor (only for the models which feature it) 41. electronic board 56. cooler air temperature sensor (cable colour: brown) 57. freezer air temperature sensor (cable colour: white) a. yellow-green; b. brown; c. blue; d. white; e. black; PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 11/41...
  • Page 12: Functional Diagram

    15. cooler door switch 16. freezer door switch 24. fan 26. safety thermal switch (+40°C) 27. defrosting cut-out switch (+8°C) 28. running capacitor (only for the models which feature it) 41. electronic board PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 12/41...
  • Page 13: Components

    2. Cooler compartment symbol 3. Freezer compartment symbol 4. Temperature indicator (symbol – or +) 5. SUPER function (rapid freezing) 6. Temperature alarm symbol of freezer compartment 7. SHOPPING function (rapid cooling) PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 13/41...
  • Page 14: Electronic Boards

    1. power control board ERF2021 2. display board ERF2000 The two electronic boards are connected by means of a flat cable with a connector; therefore, the two boards are available singularly as spare part. PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 14/41...
  • Page 15: Power Control Board Erf2021

    3. neutral 4. free 5. balancing heater 1. fan line 2. fan neutral 3. defrosting heater neutral 4. defrosting heater line 1. free 2. free 3. freezer door switch 4. freezer door switch PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 15/41...
  • Page 16 1. cooler air temperature sensor 2. cooler air temperature sensor 3. free 4. free 5. freezer air temperature sensor 6. freezer air temperature sensor 1. free 2. free 3. free 4. free PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 16/41...
  • Page 17: Display Board Erf2000

    = ON/OFF button; = temperature displaying button; = reed element (optional); = liquid crystal display; POT1 = freezer compartment temperature regulation; POT2 = cooler compartment temperature regulation; NTC1 = room temperature sensor. PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 17/41...
  • Page 18: Cooler And Freezer Compartments

    B = freezer air temperature sensor C = room temperature sensor 1 = balancing heater 2 = cooler door magnet 3 = display board reed element 4 = cooler door button 5 = freezer door button PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 18/41...
  • Page 19 Key: 6 = thermal switches 7 = cold module fan 8 = cold module defrosting heater PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 19/41...
  • Page 20: Temperature Sensors

    The magnetic switch for the cooler door control is activated by a magnet located inside the cooler door. Note: The cooler door button is located under the work top and controls only the switching on and off of the lamp. cooler door button freezer door button PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 20/41...
  • Page 21: Balancing Heater

    The defrosting heater is used to defrost the ice that has accumulated on the battery evaporator. The defrosting heater has the following values: power 235 W voltage 240 V resistance 245 Ohm PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 21/41...
  • Page 22: Thermal Switches

    +40 °C cut-out safety switch (wire colour: black - white) TYPE OF THERMAL CUT-IN TEMPERATURE OVERLOAD CUT-OUT OPENING CLOSING DEFROSTING + 8 °C - 5 °C SAFETY + 40 °C + 30 °C PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 22/41...
  • Page 23: Compressor Compartment

    6.4. Compressor compartment Key: A. connections box B. compressor 6.4.a. Connections box The connections box is located in the compressor compartment to connect the various electrical components. PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 23/41...
  • Page 24: Operation

    The operation time which corresponds to the interval between the following defrosting lasts about 14 hours with normal opening of the door (it can last up to 72 hours if the doors are never opened). PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 24/41...
  • Page 25: Normal With First Switching On Or Power Failure

    5 hours the electronic board activates the defrosting procedure (after the compressor cut-out). The electronic board activates, in any case, the defrosting procedure 5 hours after the first switching on and after a power failure. PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 25/41...
  • Page 26: Defrosting

    If 1 hour after the starting of the defrosting, the thermal switches did not cut out, the electronic board switches the defrosting heater off and continues its operation. The arrows in the picture indicate the current path. PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 26/41...
  • Page 27: Flow Chart For The Defrosting Management

    & comp on for more than 2,5 h? More than 30 h elapsed after the last defrosting & cooler or freezer door is open? More than 72 h elapsed after the last defrosting? DEFROSTING PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 27/41...
  • Page 28: Super Function (Rapid Freezing)

    (like the temperature knob was on max. position) for a duration of about 6 hours, and then it deactivates automatically. To deactivate the SHOPPING function, push the function activation button till the symbol disappears. PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 28/41...
  • Page 29 PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 29/41...
  • Page 30: Malfunctioning Of Cooler Air Temperature Sensor

    The appliance operates with preset cycle where the compressor is powered for 40 minutes and remains off for 40 minutes alternatively The defrosting procedure is activated every about 14 hours When the sensor operates again normally, the above described conditions terminate. Characteristics of the NTC sensor: PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 30/41...
  • Page 31: Malfunctioning Of Freezer Air Temperature Sensor

    The display shows freezer temperature sensor faulty. The appliance operates normally. The freezer air temperature sensor is not used to control the appliance but only to display the freezer compartment temperature. Characteristics of the NTC sensor: PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 31/41...
  • Page 32: Alarm Signalling

    The lighting of the display remains red. Pushing the function activation button: The highest temperature reached in the freezer compartment is displayed for 5 minutes; The symbol switches off; The red lighting of the display switches off. PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 32/41...
  • Page 33: Demo Mode

    -18 °C for the freezer compartment (flashing display) By rotating the temperature regulation knobs, the display shows the set temperatures (flashing display). The internal light switches on when the cooler door is opened. PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 33/41...
  • Page 34 PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 34/41...
  • Page 35: Accessibility To Freezer Compartment

    (condenser e) insert a screwdriver into the right hook and release side) f) insert a blade inside the F slot and release the g) view of the internal hook internal hook PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 35/41...
  • Page 36 2 fixing screws of the cold module n) pull backward the cold module support releasing o) view of the rear water drain duct the rear water drain duct PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 36/41...
  • Page 37 Note: The defrosting and cut-out thermal switches (+8 /+40°C) are connected together, therefore they are not available as single spare parts. PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 37/41...
  • Page 38 In case of replacement of the fan, it is necessary to ensure that the fan draws in air. y) release the door button hook and simultaneously x) to remove the freezer door switch pull it backward PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 38/41...
  • Page 39: Accessibility To Control Panel

    PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 39/41...
  • Page 40: Troubleshooting

    0 (zero Ohm) replace thermal protectors the connector of the thermal switches the thermal switches are open and verify with the tester the correct resistance value to the connector clamps 40/41 PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic...
  • Page 41: Display Symbols

    It indicates incompatibility between the electronic boards. NOT FLASHING Remedy: check the spare part nos. of the electronic boards It indicates eeprom parameter writing/reading error. NOT FLASHING Remedy: replace both electronic boards (power and display) PARTIAL NO FROST REFRIGERATORS with ERF2021 electronic 41/41...