AEG Electrolux REFRIGERATION User manual

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SERVICE MANUAL
REFRIGERATION
© Electrolux Home Products S.p.A.
Spares Operations Italy
Corso lino Zanussi, 30
I - 33080 Porcia (PN)
Fax [phone]
S.O.I.
Edition: 11.2006
Publication no.
599 38 47-44
EN
REFRIGERATORS
NO FROST
TOTAL
with
ERF2050
electronic
DIGITS
AEG styling
FACTORY: HUY

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CONTENT
1 INTRODUCTION ....................................................................................................................................... 5
2 AIR CIRCULATION.................................................................................................................................... 7
3 REFRIGERATION CIRCUIT...................................................................................................................... 8
4 ELECTRIC WIRING................................................................................................................................... 9
5 COMPONENTS....................................................................................................................................... 11
5.1 Control panel ................................................................................................................................... 11
5.2 Electronic boards............................................................................................................................. 12
5.2.1 Power board ERF2050........................................................................................................... 13
5.2.2 Display board ERF2000.......................................................................................................... 16
5.3 Cooler compartment........................................................................................................................ 17
5.3.1 Temperature sensor ............................................................................................................... 18
5.3.2 Door switch............................................................................................................................. 18
5.3.3 Air flow regulator (damper) ..................................................................................................... 19
5.3.4 Carbon air filter....................................................................................................................... 19
5.3.5 LED lighting (optional depending on the models)................................................................... 20
5.4 Freezer compartment ...................................................................................................................... 21
5.4.1 Cold module............................................................................................................................ 22
5.4.2 Thermal switches.................................................................................................................... 22
5.4.3 Cold module fan...................................................................................................................... 23
5.4.4 Defrosting heater.................................................................................................................... 23
5.4.5 Temperature sensor ............................................................................................................... 24
5.4.6 Door switch............................................................................................................................. 25
5.5 Compressor compartment ............................................................................................................... 25
6 MAIN FUNCTIONS.................................................................................................................................. 26
6.1 Normal............................................................................................................................................. 26
6.2 Normal with first switching on or power failure ................................................................................ 27
6.3 Defrosting ........................................................................................................................................ 28
6.4 Flow chart for the defrosting management ...................................................................................... 29
6.5 FROSTMATIC Function (rapid freezing) ......................................................................................... 30
6.6 COOLMATIC Function (rapid cooling)............................................................................................. 30
6.7 HOLIDAY Function (valid only for the cooler).................................................................................. 30
6.8 Malfunctioning of cooler air temperature sensor.............................................................................. 31
6.9 Malfunctioning of freezer temperature sensor ................................................................................. 32
7 ALARMS.................................................................................................................................................. 33
7.1 Freezer compartment temperature alarm........................................................................................ 33
8 ACCESSIBILITY...................................................................................................................................... 34
8.1 Freezer compartment ...................................................................................................................... 34
8.1.1 Battery evaporator.................................................................................................................. 34
8.2 Control panel ................................................................................................................................... 38
8.3 Cooler compartment accessibility.................................................................................................... 40
8.3.1 Air flow regulator (damper) ..................................................................................................... 40
8.3.2 LED lighting (optional depending on the models)................................................................... 41
9 TROUBLESHOOTING............................................................................................................................. 42
9.1 Excessive ice formation on the battery :.......................................................................................... 42
9.2 Failed defrosting: ............................................................................................................................. 42

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10 DISPLAY SYMBOLS ............................................................................................................................... 43
10.1 Cooler compartment....................................................................................................................... 43
10.2 Freezer compartment ..................................................................................................................... 44

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1 INTRODUCTION
This manual describes the TOTAL NO FROST refrigerators with ERF2050 DIGITS electronic AEG styling pro-
duced in the Nyíregyháza factory (HUY).
These models feature:
- Total No Frost (no frost freezer, refrigerator no frost)
- free standing
- single-compressor
- electronic control (electronic board ERF2021)
- digit display AEG styling
- air flow regulator (damper)
- LED lighting (optional depending on the model)
They are appliances (CBNF 350, CBNF 390 e CBNF 395) with the following PNCs:
The controls of the appliance are inserted into the work top.
The power control board is ERF2050.
The user interface board is ERF2000 (DIGIT display) with AEG styling.
Since it is a single-compressor, it is not possible to switch off only one of the two compartments.
The temperatures regulation is the following:
• from +8 to +2 °C for the cooler
• from -15 to -24 °C for the freezer
The DIGIT display enables to show the temperatures of the two compartments.
PNC MODEL BRAND
925034004 S75358KG3 AEG-Electrolux
925034005 S75358KG3 AEG-Electrolux
925034006 S75350KG3 AEG-Electrolux
925034007 S75358KG3 AEG-Electrolux
925034026 S75340KG6 AEG-Electrolux
925034027 S75348KG6 AEG-Electrolux
925034030 S75348KG6 AEG-Electrolux
925034203 S75398KG3 AEG-Electrolux
925034204 S75398KG3 AEG-Electrolux
925034205 S75390KG3 AEG-Electrolux
925034206 S75398KG3 AEG-Electrolux
925034226 S75388KG6 AEG-Electrolux
925034228 S75388KG6 AEG-Electrolux
925034402 S75408KG AEG-Electrolux
925034403 S75400KG AEG-Electrolux

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The appliance has the following functions:
• rapid freezing
• rapid cooling
• freezer temperature alarm
• cooler compartment holiday
The appliance consists of the following compartments:
• freezer;
•cooler;
The evaporating circuit consists of:
• cold module (freezer compartment);
Key:
A = control panel
B = cooler compartment (No Frost)
C = cold module
D = freezer compartment (No Frost)

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2 AIR CIRCULATION
Unlike in the PARTIAL NO FROST refrigerator, in the TOTAL type the cooler and the freezer communicate
each other, therefore, the battery evaporator cools both compartments.
The cold produced by the battery evaporator in the freezer compartment, is distributed by the fan F placed be-
hind the cold module.
Cooler compartment air flow: the cold air is pushed by the fan into the foamed duct and exits from the air flow
regulator (damper) E located in the rear part of the diffuser-lamp holder.
The air returns in the freezer compartment by means of some foamed ducts entering the air vent grids G.
Freezer compartment air flow: the cold air is pushed into the compartment through the air screen and returns
into the cold module through the front air vent grid.
In case of opening of the freezer or cooler door the fan stops.
To simulate the door closed use a magnet and put it next to the reed element located in
the electronic board or push the freezer door button.

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3 REFRIGERATION CIRCUIT
Key:
1. compressor;
2. condenser;
3. anti-condensation coil;
4. dehydrator filter;
5. capillary;
6. battery evaporator (freezer compartment);
7. exchanger.

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4 ELECTRIC WIRING
(Check the specific diagram for each model!)

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Key:
1. connection box
3. compressor
5. motor protector
9. defrosting heater
13. lamp
16. freezer door switch
19. ON/OFF switch
24. fan
26. safety thermal switch (+40 °C)
27. defrosting cut-out switch (+8 °C)
41. electronic board ERF 2050
52. air flow regulator (damper)
56. cooler air temperature sensor (cable colour: brown)
57. freezer air temperature sensor (cable colour: white)
67. LED electronic board (optional)
a. yellow-green
b. brown
c. blue
d. white
e. black

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5 COMPONENTS
5.1 Control panel
Key:
Cooler compartment
A. ON/OFF button
B. cooler temperature increase button (+)
C. cooler temperature displaying
D. cooler temperature decrease button (-)
E. COOLMATIC function button (rapid cooling)
F. COOLMATIC function pilot lamp (rapid cooling)
Freezer compartment
G. FROSTMATIC function pilot lamp (rapid freezing)
H. FROSTMATIC function button (rapid freezing)
I. freezer temperature increase button (+)
J. freezer temperature displaying
K. freezer temperature decrease button (-)
L. alarm deactivation button
M. alarm pilot lamp

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5.2 Electronic boards
The electronic board of the appliance consists of:
1. power board ERF2050
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.

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5.2.1 Power board ERF2050
- View of the electronic board (side of components):
1. earth contact
2. free
3. line
4. compressor
5. neutral
6. lamp neutral
7. lamp
8. defrosting heater neutral
9. defrosting heater
1. fan line
2. fan neutral

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1. free
2. free
3. LED light board (+) (optional)
4. LED light board (-) (optional)
5. damper
6. damper
7. damper
8. damper
1. free
2. free
1. cooler air temperature sensor
2. cooler air temperature sensor
3. free
4. free
5. freezer air temperature sensor
6. freezer air temperature sensor

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1. free
2. free
3. free
4. free
1. free
2. free
3. freezer door switch
4. freezer door switch

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5.2.2 Display board ERF2000
Key:
SW1 = reed element
SW3 = cooler temperature increase button (+)
SW4 = cooler temperature decrease button (-)
SW5 = COOLMATIC function button (rapid cooling)
SW7 = freezer temperature increase button (+)
SW8 = freezer temperature decrease button (-)
SW9 = FROSTMATIC function button (rapid freezing)
SW10 = alarm deactivation button
DISP1 = cooler display
DISP2 = freezer display
LD2 = + sign pilot lamp
LD3 = COOLMATIC function pilot lamp (rapid cooling)
LD5 = - sign pilot lamp
LD6 = FROSTMATIC function pilot lamp (rapid freezing)
LD7 = alarm pilot lamp

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5.3 Cooler compartment
Key:
1. cooler door magnet
2. display board reed element
3. air flow regulator (damper)
4. carbon air filter
5. LED lighting (optional depending on the model)
A. cooler air temperature sensor

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5.3.1 Temperature sensor
1 NTC sensor detects the temperature of the cooler:
• cooler air temperature sensor (placed inside the right air vent grid)
The cooler air temperature sensor is used both to control the appliance by means of the air flow regulator
(damper) and to display the cooler compartment temperature.
The sensor A has the foamed cable inside the cabinet, therefore it is not replaceable (for further information
please see Service Bulletin 599374122).
5.3.2 Door switch
The battery evaporator defrosting is driven by the electronic board and depends also on the detection of the
opening of the doors.
The detection of the opening of the cooler door is carried out by means of:
• magnetic switch for the cooler door control (located on the display board inserted into the work top)
The magnetic switch for the cooler door control is activated by a magnet located inside the cooler door.
The magnetic switch controls also the switching on of the lamp and of the LED lighting if featured (optional de-
pending on the models).

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5.3.3 Air flow regulator (damper)
The temperature regulation of the cooler compartment occurs by means of the passage or not of cold air from
the damper, which can have only 2 fixed positions, opened or closed.
The air flow regulator (damper) 1 is located inside the diffuser lamp holder 2.
The damper consists of a door and a stepping motor and it is connected to the electric wiring by means of a 4-
pole connector.
5.3.4 Carbon air filter
The carbon air filter 1 is located inside the door 2 indicated in the figure.
The door must be always closed during the operation of the appliance.

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5.3.5 LED lighting (optional depending on the models)
The LED lighting is obtained by means of a electronic board ERFL100.
The electronic board is placed inside the air diffuser and is connected to the electric wiring through a 3-pole
connector.
The voltage of the electronic board is 18 VDC (direct current).