Electrolux NOFROST UNDERCOUNTER FREEZERS Service Manual

With electronic timer
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© ELECTROLUX ZANUSSI S.p.A.
Spares Operations Italy
Corso Lino Zanussi, 30
I - 33080 PORCIA / PN (ITALY)
Fax +39 0434 394096
Publication No.
599 35 31-70
020708
ITZ/SERVICE/AA
SERVICE MANUAL
REFRIGERATION
NOFROST
UNDERCOUNTER
FREEZERS
WITH ELECTRONIC
TIMER

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  Summary of Contents for Electrolux NOFROST UNDERCOUNTER FREEZERS

  • Page 1 SERVICE MANUAL REFRIGERATION NOFROST UNDERCOUNTER © ELECTROLUX ZANUSSI S.p.A. Publication No. FREEZERS Spares Operations Italy 599 35 31-70 Corso Lino Zanussi, 30 020708 WITH ELECTRONIC I - 33080 PORCIA / PN (ITALY) ITZ/SERVICE/AA TIMER Fax +39 0434 394096...
  • Page 2 NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 2/20...
  • Page 3: Table Of Contents

    8.1. ACCESS TO CONTROL PANEL........................17 8.2. ACCESS TO FREEZER COMPARTMENT ..................... 18 9. TROUBLESHOOTING ............................20 9.1 DRAIN CIRCUIT: ..............................20 9.2 EXCESSIVE ICE FORMATION ON THE BATTERY:..................20 9.3 MANUAL DEFROSTING PROCEDURE......................20 NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 3/20...
  • Page 4 NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 4/20...
  • Page 5: Introduction

    The fan makes the cold air circulate in the compartment: it enters by nozzle 1 and comes out of nozzle 2 passing through the evaporator battery. The NTC sensor is located inside (pos. A) and detects the air temperature in the compartment. NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 5/20...
  • Page 6: Refrigeration Circuit

    2. REFRIGERATION CIRCUIT Legend: compressor condenser filter capillary heat exchanger battery evaporator NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 6/20...
  • Page 7: Electric Wiring

    26. safety thermal switch (+40 °C); 27. defrosting cut-out switch (+10 °C); 28. running capacitor (the capacitor is indicated only for the models listed in the spare parts list); 32. NTC Sensor; 41. electronic thermostat with timer assembly; NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 7/20...
  • Page 8: Functional Diagram

    26. safety thermal switch (+40 °C); 27. defrosting cut-out switch (+10 °C); 28. running capacitor (the capacitor is indicated only for the models listed in the spare parts list); 32. NTC sensor; 41. electronic thermostat with timer assembly; NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 8/20...
  • Page 9: Operation

    The operation time which corresponds to the interval between the following defrosting lasts about 19 hours with normal opening of the door ( it can last up to 72 hours if the door is never opened ! ). The arrows in the picture indicate the current path. NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 9/20...
  • Page 10: Normal With First Switching On Or Power Failure

    The compressor functions continuously for about 50 hours, afterwards it switches off automatically. If the button is pressed again, the SUPER function is deactivated: The corresponding led is switched off; The compressor functions in thermostatic conditions. NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 10/20...
  • Page 11: Defrosting

    Moreover, if 1 hour after the defrosting start the safety thermal switches did not switch off, the electronic board switches off anyway the defrosting heater and the process carries on. The arrows in the picture indicate the current path. NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 11/20...
  • Page 12: Alarms

    (it may cause a breakage or the detachment of the connector or a short circuit), therefore: The temperature alarm led and the SUPER led flash intermittently; The buzzer sounds intermittently with long tones ( where needed ! ); The compressor functions in thermostatic conditions. NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 12/20...
  • Page 13: Ntc Sensor Malfunctioning Alarm (Optional)

    The appliance functions with a predefined cycle, by which the compressor is powered for 30 minutes and remains off for 45 minutes alternatively; The defrosting procedure starts every 19 hours. When the sensor returns to normal operation the above mentioned functions end. Characteristics of NTC sensor: NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 13/20...
  • Page 14: Components

    - defrosting heater G ( 151 W – 381 Ω ) - conveyor K - fixing clips L TYPE OF THERMAL OPERATION TEMPERATURE OVERLOAD CUT-OUT OPENING CLOSURE DEFROSTING + 10 °C - 1 °C SAFETY + 40 °C + 30 °C NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 14/20...
  • Page 15: Rubber Valve

    WARNING: the electronic board features a protection that prevents the compressor from switching on 5 minutes before the last switching off ! NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 15/20...
  • Page 16 - C SUPER button. 1. compressor 2. free 3. line 4. neutral 1. neutral 2. free 3. defrosting heater 4. free 5. fan 1. NTC 2. NTC 1. NTC 2. free 3. NTC NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 16/20...
  • Page 17: Accessibility

    ) then push the top forward to uncouple the hooks from the head screws. Inside the top there is the control support with the electronic board, the thermostat knob, SUPER button. The electronic sensor enters the guide from hole U . NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 17/20...
  • Page 18: Access To Freezer Compartment

    The evaporator battery F is hooked to the conveyor K by means of two side clips L and three hooks N which can be removed by a screwdriver and placed on the bottom. NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 18/20...
  • Page 19 The conveyor for the defrosting heater is fitted to the bottom of the compartment with two clips; to remove the conveyor it is necessary to push down the two clips. The fan The fan is fitted with two screws. NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 19/20...
  • Page 20: Troubleshooting

    In case of error or wrong execution of the operations, the electronic board returns to normal conditions. In this case, before performing the manual defrosting procedure again, it is necessary to reset the door state, opening and closing it again. NOFROST UNDERCOUNTER FREEZERS WITH ELECTRONIC TIMER 20/20...