combined refrigerator-freezers with nofrost

CNPes 3867

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Combined refrigerator-freezers with NoFrost

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Functions

CNPes 3867


Operating and control elements

Functions

Temperature display refrigerator compartment

Temperature display freezer compartment

“OK” button

Selection buttons

CNPes 3867


• Temperature control: Electronic control system

• Adjustable temperature range: Refrigerator comp.: +2°C to +11°CFreezer compartment: -16°C to -26°C

• Temperature display: Actual value, digital

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

• Door alarm: Refrigerator comp.: visual and audibleFreezer compartment: visual and audible

• Fan: Refrigerator comp.: yesFreezer compartment: yes

Functions at a glance

Functions

CNPes 3867


• Defrosting: Refrigerator comp.: automaticFreezer compartment: automatic

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

• SuperCool: Automatic, 6 hours / +2°C

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

• SuperFrost: Automatic, quantity-controlled, 30 - 65 hours

Functions at a glance

Functions 5 / 47

Design

CNPes 3867


Schematic diagram refrigerating system

B A

Refrigerator compartment evaporator

Freezer compartment evaporator

Compressor

Solenoid valve

Condenser

Design

CNPes 3867


Interior view refrigerator compartment

Light housing

Fan

Design

Evaporator sensor

Air sensor

CNPes 3867


Schematic diagram freezer compartment

Fan

Design

Evaporator

Evaporator sensor

Defrost water drain

Reed PCB

Air sensor

CNPes 3867


Interior view freezer compartment

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Fan module

Temperature fuse

Evaporator module

Defrost water drain

Design

Evaporator sensor

Positionair sensor in front of

air duct cover

Control system

CNPes 3867


Refrigerator compartment air sensor

Position:Clipped into light housing.

Depending on this sensor ...- the solenoid valve switches to position B.

- and on the freezer compartment air sensor (AND relation),

the compressor switches OFF.

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

Control

CNPes 3867


Refrigerator compartment evaporator sensor

Position:

Attached to sensor holder behind cover on left of inner rear wall, level with light housing.

Depending on this sensor,- the solenoid valve switches to position A.

- the compressor switches ON.

Control

CNPes 3867


Freezer compartment air sensor

Position:

Clipped into sensor holder on air duct cover.

Depending on this sensor ...- and on the refrigerator compartment evaporator sensor,

the compressor switches ON.

- and on the refrigerator compartment air sensor,

the compressor switches OFF.

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

Control

CNPes 3867


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

CNPes 3867


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

CNPes 3867


Refrigerator compartment fan

Position:

At top in middle of refrigerator compartment.

Refrigerator compartment fan ON- when fan is switched on via display electronic control system and- when compressor is ON and- when solenoid valve is in position A (refrigerator compartment and freezer compartment) and- when the evaporator-sensor is equal or colder than +8°C and- when the refrigerator-door is closed.

Refrigerator compartment fan OFF- when fan is switched off via display electronic control system and- when the refrigerator-door is open.

Control 17 / 47

Parts replacement

CNPes 3867


Refrigerator compartment fan

Fan

• Undo screws.

• Disconnect fan cable.

Parts replac.

CNPes 3867


Refrigerator compartment air sensor

Procedure

• Disassemble light housing, undo marked Torx screws.

• Disengage refrigerator compartment air sensor.

Air sensor

Air sensor

Parts replac.

CNPes 3867


Refrigerator compartment evaporator sensor

Procedure

• Undo marked Torx screw.

• Remove cover.

• Detach evaporator sensor holder.

• Disengage evaporator sensor.

Evaporator sensor

Parts replac.

CNPes 3867


Reed PCB

Fan

Air sensor

Air duct cover

Freezer compartment air duct cover

Air duct cover

• Undo screws.

• Detach air sensor.

• Remove air duct cover.

Parts replac.

CNPes 3867


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.

CNPes 3867


Freezer compartment reed PCB

Fan module

Reed PCB

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

Reed PCB

Parts replac.

CNPes 3867


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.

Parts replac.

CNPes 3867


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

Parts replac.

CNPes 3867


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.

CNPes 3867


Disassembling the electronic control system

Bus PCB, bus cable and power PCB.

Power PCB

Bus PCB

Bus cable

Parts replac.

CNPes 3867


Disassembling the display

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

Parts replac.

CNPes 3867



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

Parts replac.

CNPes 3867



Press locating lug downwards and draw off the bus cable.

Parts replac.

CNPes 3867


Changing the door hinges

Remove bearing support cover

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

Detach covers

Parts replac.

CNPes 3867



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.

CNPes 3867



Disassembling the door

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

Parts replac.

CNPes 3867


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.

CNPes 3867



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.

CNPes 3867



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.

CNPes 3867



Insert hinge bushing with cable on the left-hand side

Assembly is effected in the reverse order.

38 / 47Parts replac.

Special features

CNPes 3867


Compressor with VCC technology

Inverter electronics

NEW: Inverter electronics attached to side of compressor.

• With frequency signal from the power PCB (separate cable).

Mains supply line

Mains voltage

Compressor

Inverter electronics

Frequency signal

Special features

CNPes 3867


• Depending on the frequency signal from the power PCB, the inverter electronics switch the compressor on and off and also define the speed.

• 4 fixed speed steps: 1600, 1900, 3000, 3600 rpm.

• 3000 rpm during start-up.

• 3600 rpm with SuperFrost.

• Speed 3000 rpm with missing frequency signal (e.g. due to contact difficulty on plug).The compressor starts up with 20 minutes delay.

• Speed increase: by one step while compressor is running if the compressor runs for more than 70 minutes.

• Speed reduction: by one step on next start-up if the compressor was in operation for less than 40 minutes.

Compressor with VCC technologySpeed control

Special features 41 / 47

Hiddenfunctions

CNPes 3867


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 compartment

L : Service mode

S : Factory testing

E : Sensor test

Simultaneously press buttons for 3 seconds

Hidden functions

CNPes 3867


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

CNPes 3867


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

CNPes 3867


Service mode

Service mode

L0 : No consumer switched on

L1 : Compressor lowest speed,solenoid valve in position B

L2 : Compressor highest speed,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 switched on

End with OK button

Hidden functions

CNPes 3867


Sensor testSensor mode

E0 : n/a

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 : n/a

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 47 / 47

combined refrigerator-freezers with nofrost

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