CBNes 3857 BioFresh and NoFrost

CBNes 3857

1 / 53Hidden functionsParts replac.Control Special featuresDesignHome Functions

Combined refrigerator-freezer with BioFresh and NoFrost

1 / 53Home

Functions

CBNes 3857


Operating and control elements

Functions

Temperature display refrigerator compartment

Temperature display freezer compartment

“OK” button

Selection buttons

CBNes 3857


• Temperature control: Electronic control system

• Adjustable temperature range: Refrigerator comp.: +4°C to +9°CFreezer compartment: -16°C to -26°C

• Temperature display: Actual value, digital

• Temperature alarm: Refrigerator comp.: noBioFresh compartment: noFreezer compartment: visual and audible

• Door alarm: Refrigr. BioFresh comp.: visual and audibleFreezer compartment: visual and audible

• Fan: Refrigerator comp.: yesFreezer compartment: yes

Functions at a glance

Functions

CBNes 3857


• Defrosting: Refrigerator comp.: automaticFreezer compartment: automatic

• Interior light: Refrigerator comp.: yesFreezer compartment: no

• SuperCool: Automatic, +4°C / 6 hours

• Vacation mode: Refrigerator comp. adjusts to +15°C.Refrigerator compartment must be empty.

• SuperFrost: Automatic, quantity-controlled, 30 - 65 hrs.

Functions at a glance

Functions 5 / 53

Design

CBNes 3857


Schematic diagram refrigerating system

B A

Refrigerator compartment evaporator

Freezer compartment evaporator

Compressor

Solenoid valve

Condenser

Design

CBNes 3857


Schematic diagram refrigerator BioFresh compartment

Design

Defrost water channel heater (foamed in)

Evaporator sensor

BioFresh air sensor

Rear wall evaporator foamed in

Vertical separating plate

Fan

Ambient air sensor on power PCB

Horizontal separating plate

Air sensor in light housing

CBNes 3857


Interior view of the refrigerator BioFresh compartment

Air sensor

BioFresh air sensor

Fan

Design

Evaporator sensor

CBNes 3857


Schematic diagram freezer compartment

Foamed in liquid heater

IceMaker

Fan

Design

Evaporator

Water intake pipe embedded in foam

Evaporator sensor

Defrost water drain

Air sensor

CBNes 3857


Carrier plate

Tandem solenoid valve

Water line

Overfill lever

Schematic diagram IceMaker

Design

CBNes 3857


Interior view freezer compartment

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Reed PCB

Fan module

IceMaker

Temperature fuse

Evaporator module

Defrost water drain

Design

Evaporator sensor

Position air sensor in front of air duct cover

Control

CBNes 3857


Refrigerator compartment air sensor

Depending on this sensor,

- the BioFresh fan switches ON / OFF.

- the display value for the refrigerator compartment temperature is produced.

Position:

In light housing.

Control

CBNes 3857


BioFresh compartment air sensor


- the compressor switches OFF.

- the solenoid valve switches to position B.

Position:

Under horizontal separating plate, clipped into vertical separating plate.

Control

CBNes 3857


Refrigerator BioFresh compartment evaporator sensor


- the defrosting phase is ended.

- the compressor switches ON and the solenoid valve switches to position A.

Position:

In sensor holder on compartment liner rear wall.

Control

CBNes 3857


Freezer compartment air sensor

Position:

Clipped into sensor holder on air duct cover.

Depending on this sensor ...

- the compressor switches ON.

- the compressor switches OFF.

- and on the freezer compartment evaporator sensor,

the freezer compartment fan switches ON.

- the display value for the freezer compartment temperature is produced.

Control

CBNes 3857


Freezer compartment evaporator sensor

Position:

Inserted into lamellar evaporator.

Depending on this sensor ...

- the defrosting phase is ended.

- and on the freezer compartment air sensor,

the freezer compartment fan switches ON.

Control

CBNes 3857


Defrost heater, defrosting phase

Position:

Clipped into lamellar evaporator and installed in defrosting water drain tray.

Defrosting phase is initiated- during start-up after 6 hours cumulative compressor running time.- during normal operation after 12 - 60 hours cumulative compressor running time,

depending on the number/duration of the door openings.

Defrosting phase is ended- when the freezer compartment evaporator sensor reaches +5°C.- when the maximum defrosting time of 50 minutes is reached.

Control 19 / 53

Parts replacement

CBNes 3857


Disassembling the electronic control system

Undo Torx screws.

Disengage covers.

Draw off bus cable forwards using disassembly aid on the cable.

Disassembly aid

Parts replac.

CBNes 3857


Disassembling the electronic control system

Bus PCB, bus cable and power PCB.

Power PCB

Bus PCB

Bus cable

Parts replac.

CBNes 3857


Disassembling the display

Carefully disengage display cover, first at the bottom and then at the side.

Parts replac.

CBNes 3857



Undo Torx screws and carefully remove display (against adhesive force sealing tape) in a forward direction.

Parts replac.

CBNes 3857



Press locating lug downwards and draw off the bus cable.

Parts replac.

CBNes 3857


Changing the door hinges

Remove bearing support cover

Push locating lug in with screwdriver, lift off cover upwards.

Detach covers

Parts replac.

CBNes 3857



Remove bus connector

Draw off bus cable forwards using disassembly aid on the cable and pull out cable upwards.

Caution on assembly!

The bus cable must be lain behind the bearing support as shown. The cable and the individual wires must be lain behind the bearing support so that when the bearing support cover is fitted the cable or the wires are not squeezed.

Parts replac.

CBNes 3857



Disassembling the door

Turn out bearing support screws, swing door out sideways and lift up.

Parts replac.

CBNes 3857


Cover

Spacer piece


Remove bearing support and refit to left-hand hinge

Switch over spacer piece (red) and cover (silver).

Procedure

• Undo bearing support screws.

• Switch over spacer piece and cover.

• Switch over earthing plate.

• Screw bearing support onto other side again.

Earthing plate

Cover

Spacer piece

Parts replac.

CBNes 3857



Remove parts from right-hand door bearing opening

Remove cover and disassemble hinge bushing with cable.

Procedure

• Lever out cover with screwdriver.

• Undo screws on hinge bushing.

• Pull out hinge bushing on boss marked with symbol with pliers.

Parts replac.

CBNes 3857



Remove parts from left-hand door bearing opening and fit to other side

Remove cover, remove rubber seal and fit to other side.

Rubber seal

Parts replac.

CBNes 3857



Insert hinge bushing with cable on the left-hand side

Assembly is effected in the reverse order.

Parts replac.

CBNes 3857


Horizontal separating plate

Disassembling the horizontal separating plate

• Remove BioFresh drawers.

• Remove bottle rack and vegetable bin.

• Pull lug 2 downwards and pull out horizontal separating plate.

Info: BioFresh air sensor 1 does not have to be disengaged.

1 2

Parts replac.

CBNes 3857


Vertical separating plate

Disassembling the vertical separating plate, accessing evaporator

• Disassemble the horizontal separating plate.

• Remove glass shelves.

• Undo fastening screws of separating plate.

• Disconnect connection cable of the fan.

• Evaporator holding screws are now accessible.

Info: BioFresh air sensor has to be disengaged.

Cover recess with blind plug

Parts replac.

CBNes 3857


BioFresh air sensor

Procedure


• Disengage BioFresh air sensor.

• Disassemble the vertical separating plate.

Parts replac.

CBNes 3857


Refrigerator compartment air sensor

Procedure

• Disassemble light housing, undo marked Torx screws.

• Disengage refrigerator compartment air sensor.


Air sensor

Parts replac.

CBNes 3857


Refrigerator BioFresh compartment evaporator sensor

Procedure


• Detach evaporator sensor holder.

• Disengage evaporator sensor.

Parts replac.

CBNes 3857


Refrigerator BioFresh compartment fan

Procedure



• Disconnect fan.

• Remove vertical separating plate and detach holding clips on polystyrene part.

Parts replac.

CBNes 3857


Reed PCB

Air sensor

Air duct cover

Freezer compartment air duct cover

Air duct cover

• Undo screws.

• Detach air sensor.

• Remove air duct cover.

Fan

IceMaker

Parts replac.

CBNes 3857


Evaporator, fan module, temperature fuse

Evaporator

• Undo screw on evaporator.

• Slightly lift evaporator and swing out.

Evaporator

Temperature fuse

Temperature fuse

• Undo screw.

• Pull out temperature fuse (+93°C)upwards.

Fan module

Fan module

• Undo screws.

• Tilt module down at front.

• Disconnect fan cable.

Parts replac.

CBNes 3857


Freezer compartment reed PCB

Fan module

Reed PCB

• The direction of installation of the reed PCB must be observed, otherwise no function.

Reed PCB

41 / 52Parts replac.

Special features

CBNes 3857


Water drain valve

Water drain valve

• The water drain valve is accessible from the compressor niche. It is situated just above the evaporation tray of the compressor.

Special features

CBNes 3857


VCC-compressor, time controlled

Special features

t

3,63,01,9

Drehzahlerhöhung

Drehzahl-absenkung

Drehzahl-erhöhung

1,6

t

Kompressor-laufzeit > 70 Min.

Kompressor-laufzeit < 40 Min.U/min.

x 1000

Compressor speed control

• The inverter PCB calculates the compressor speed automatically.

• Compressor operation time more than 70 minutes: speed increase

• Compressor operation time less than 40 minutes: speed reduction

• Compressor operation time 40 to 70 minutes: no change in speed

CBNes 3857


Solenoid valve

Permanent magnets

Attention: install correctly

The magnets must repel each other.

Solenoid valve

• Magnetic coil replaceable (2.8 KOhm).

• Refrigerating connections are printed onsolenoid valve cover:KS : Refrigerator compartment capillaryGS : Freezer compartment capillary

Special features 45 / 53

Hidden functions

CBNes 3857


Start "Hidden Functions"

Service menu

With display appliances the service menu is

under the point "Hidden Functions".

The service menu is called by simultaneously

pressing the marked buttons for 3 seconds.

d1 : Demo mode

H : Defrost heater freezer comp.

L : Service mode

S : Factory testing

E : Sensor test

Hidden functions

Simultaneously press buttons for 3 seconds

CBNes 3857


Selection of functions

Press button or to select function and confirm with round button ("OK").

Hidden functions

d1 : Demo mode is deactivated.If "OK" is pressed, the Demo mode isactivated.

d0 : Demo mode is activated.If "OK" is pressed, the Demo mode isdeactivated.

H : If "OK" is pressed, the freezer comp. defrost heater is switched on

L : If "OK" is pressed, the Service mode is called up.

S : Factory testing

E : If "OK" is pressed, the sensor test is called up.

Hidden functions

CBNes 3857


Service mode

Service mode -Control panel test-

L If "OK" is pressed, the Service mode is called up. Control panel test:- Display "rd"- Open and close freezer compartment door, then refrigerator compartment door (audible signal).- Press each button once, confirmed by corresponding square lighting up in display.

Hidden functions

CBNes 3857


Service mode

Service mode

L0 : No consumer switched on

L1 : Compressor, solenoid valve in position B

L2 : Compressor, solenoid valve in position A

L3 : Freezer compartment fan switched on

L4 : Freezer compartment defrost heater switched on

L5 : Refrigerator compartment interior light switched on

L7 : Refrigerator compartment fan, low speed

L8 : Refrigerator compartment fan, high speed

Ld : Defrost water channel heater

End with OK button

Hidden functions

CBNes 3857


Sensor test

Sensor mode

E0 : BioFresh air sensor

E1 : Refrigerator compartment air sensor

E2 : Refrigerator compartment evaporator sensor

E3 : Freezer compartment air sensor

E4 : Freezer compartment evaporator sensor

E5 : n/a

E6 : n/a

E7 : Ambient temperature sensor

E8 : Freezer compartment door (0=door closed, 1=door open)

E9 : Refrigerator compartment door (0=door closed, 1=door open)

End with OK button

With display appliances,

the sensor test is referred

to as "Sensor mode".

Hidden functions

CBNes 3857


IceMaker inflow times

With display appliances with IceMaker, the water inflow time can be set via the display.

Hidden functions

1 = 3 seconds2 = 3.5 seconds3 = 4 seconds (= initial setting)4 = 4.5 seconds5 = 5 seconds6 = 5.5 seconds7 = 6 seconds8 = 6.5 seconds

Confirm set value with OK button.

CBNes 3857


IceMaker error codes

Hidden functions 53 / 53

Water: Water inflow display

Ice Cube: Ice cube display

Self Test: Self test display (only for production)

Sensor: Sensor error display

Mechanic: Mechanical fault display(e.g. blocked tray)

Documents

CBNes 3857 BioFresh and NoFrost