Kuppersbusch IKEF 248-5 Bedienungsanleitung

Refrigerators

IKEF 248-5

IKEF 238-5

Service Manual: H8-420-02-06

Responsible: Uwe Laarmann KÜPPERSBUSCH HAUSGERÄTE AG

E-mail: uwe.laarmann@kueppersbusch.de

Tel.: (0209) 401-732 Kundendienst

Fax: (0209) 401-743 Postfach 100 132

Date: 01.04.2005 45801 Gelsenkirchen

Service Manual 3

For internal use only

Contents

1. Safety instructions ......................................................................................................... 4

2. Introduction..................................................................................................................... 5

2.1 General.................................................................................................................. 5

2.2 Measuring the temperature ................................................................................... 6

2.3 Air flow................................................................................................................... 7

3. Appliance components .................................................................................................. 8

3.1 Front view.............................................................................................................. 8

3.2 Rear view .............................................................................................................. 9

4. Cooling circuit .............................................................................................................. 10

5. Electric system ............................................................................................................. 11

6. Function chart............................................................................................................... 12

7. How the refrigerators operate ..................................................................................... 13

7.1 IKEF 238-5 .......................................................................................................... 13

7.2 IKEF 248-5 .......................................................................................................... 16

7.3 Acoustic alarm (both models).............................................................................. 17

8. Accessing the components in the keep-fresh cooling zone .................................... 18

8.1 Battery-driven evaporator and evaporator sensor............................................... 18

8.2 0° sensor ............................................................................................................. 19

9. Accessing the components in the refrigerator.......................................................... 20

9.1 Fan and refrigerator sensor................................................................................. 20

9.2 Control panel ....................................................................................................... 22

10. Design for models with an air filter............................................................................. 26

11. Technical features ........................................................................................................ 27

11.1 IKEF 238-5 .......................................................................................................... 27

11.2 IKEF 248-5 .......................................................................................................... 27

4 Service Manual

For internal use only

1. Safety instructions

Danger!

Repairs may only be carried out by a qualified electrician!

Inexpert repairs may lead to risks and damages for the user!

To prevent electric shocks, please observe the following tips:

• In the event of faults, housing and frame may be live! Prior to repairs, disconnect the appliance from

the mains!

• Touching live components inside the appliance may cause dangerous currents to flow through your

body!

• Unplug the appliance before repair!

• When inspecting live parts, a residual current operated device must be used at all times!

• Always ensure that an earthed conductor is properly connected. The ground wire resistance must not

exceed that specified in the standard! It is of vital importance for ensuring the safety of people and

the functioning of the appliance.

• On completion of repairs, an inspection must be carried out in accordance with VDE 0701

[Association of German Electrical Engineers] or the corresponding regulations for your country! On

completion of repairs, a function and impermeability inspection must be carried out.

• Do not touch any of the components in the appliance. The modules are also live!

• Observe ESD instructions.

Attention!

Make sure you observe the following instructions:

• The appliances must be disconnected from the mains prior to all repairs. If inspections must be

carried out on live appliances, make sure you use a residual current operated device.

Sharp edges: Use protective gloves.

Components may be electrostatic!

Observe handling precautions!

Service Manual 5

For internal use only

2. Introduction

2.1 General

The IKEF 238-5 and IKEF 248-5 models are described in this manual.

The IKEF 238-5 is a refrigerator with a standard refrigerator compartment and a 4-star freezer

compartment. The PNC is type 923457xxx (195 4S).

The IKEF 248-5 is a refrigerator with a standard refrigeration compartment and a 0° keep-fresh cooling

zone. The PNC is type 923524xxx (210 CC).

The evaporator circuit of the IKEF 248-5 comprises a battery-driven evaporator in the keep-fresh cooling

zone.

The evaporator circuit of the IKEF 238-5 comprises a battery-driven evaporator in the keep-fresh cooling

zone and a tube evaporator in the 4-star freezer compartment.

The appliances are equipped with electronic controls of type ERF 2000.

Legend:

A = 4-star freezer compartment

B = Standard refrigerator compartment

C = Divider plate

D = Keep-fresh cooling zone (0°)

A divider plate is located between the standard refrigeration compartment and the keep-fresh cooling

zone. The front of the divider plate is designed in such a manner that air can circulate between both

zones.

Unlike the NO FROST refrigerator, the 0° appliance has a battery-driven evaporator without defrost

resistance and without the respective thermo switches, since defrosting of the battery is carried out by

fan operation when the compressor is switched off.

6 Service Manual

For internal use only

2.2 Measuring the temperature

The temperature is measured with 3 or 4 sensors:

• Refrigerator sensor (at the fan)

• 0° sensor (on the casing of the keep-fresh cooling zone)

• Sensor of the battery-driven evaporator (on the battery itself)

• Room temperature sensor (IKEF 238-5 only)

This is part of the display electronic unit.

Legend:

A = 0° sensor

B = Sensor for the battery-driven evaporator

C = Refrigerator sensor

D = Room temperature sensor (IKEF 238-5)

The cables of sensors A, B and C have been foamed in the inside of the casing and can hence not be

replaced.

Service Manual 7

For internal use only

2.3 Air flow

The cold generated by the battery-driven evaporator (located in the keep-fresh cooling zone behind the

evaporator cover E) is firstly spread by the fan located behind the fan casing C into the keep-fresh

cooling zone and then into the standard refrigeration compartment.

The air is sucked in by the fan which is located in the top part of the refrigeration compartment. It flows

through the channels and flows down to the battery-driven evaporator. The cold air is expelled from the

bottom part of the battery-driven evaporator, makes contact with the two drawers of the keep-fresh

cooling zone and travels upwards through the gap between the divider plate and the door into the

standard cooling compartment.

AIR FLOW

8 Service Manual

For internal use only

3. Appliance components

3.1 Front view

The most important appliance components are:

1. Control panel

2. Butter compartment

3. Door compartment

4. Bottle shelf

5. Keep-fresh cooling zone drawer (see note a)

6. Divider plate

7. Shelves

8. Air filter (special fitting, see note b)

9. Freezer compartment door

10. Model identification plate

11. Magnet holder

Note:

a) The drawers of the keep-fresh cooling zone have regulating flaps for the humidity control function

• Regulating flap closed to maintain level of humidity.

• Regulating flap open to reduce level of humidity.

It is vital that the drawer covers be positioned correctly for the „humidity control" function to operate

properly.

b) Depending on the model, a channel may be present instead of the air filter. The channel contains

an insulation panel made of polystyrene.

Service Manual 9

For internal use only

3.2 Rear view

The most important appliance components are:

A Drainage filter

B Operating condensor

C Compressor

D Additional drip cup for water (IKEF 248-5 only)

E Drip cup for water

10 Service Manual

For internal use only

4. Cooling circuit

IKEF 238-5

1. Compressor

2. Evaporator

3. Frame heater

4. Dryer

5. Capillary tube

6. Tube evaporator

7. Battery-driven evaporator

(keep-fresh cooling zone)

8. Heat exchanger

IKEF 248-5

1. Compressor

2. Condensor

3. Frame heater

4. Dryer

5. Capillary tube

6. Battery-driven evaporator

(keep-fresh cooling zone)

7. Heat exchanger

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