Kuppersbusch IKEF 238-5 User manual

Replacing an NTC sensor
IKEF 238-5, IKEF 248-5, IKEF 308-5 Z3
IKE 309-5-2T, IKE 318-4-2T, IKE 339-0
IKE 458-4-4T, ITE 239-0

Service Manual: H8-74-05
Responsible: U. Laarmann KÜPPERSBUSCH HAUSGERÄTE AG
E-mail: [e-mail]
Phone: [phone] Kundendienst
Fax: [phone] Postfach 100132
Date: 6.06.2007 45801 Gelsenkirchen
Example of a name plate
Model design
Version type
PNC number
Serial number
Year Week

Service Manual 3
For internal use only
Inhalt
1. Safety ............................................................................................................................... 4
2. Temperature sensor faults ............................................................................................ 5
2.1 Fault checking ....................................................................................................... 5
2.2 Features of the temperature sensor ...................................................................... 5
3. Schedule of sensor installation .................................................................................... 8
4. Projection positions ....................................................................................................... 9
5. Instructions for replacing a sensor ............................................................................ 14
5.1 Kit B - spare-part no. 43 37 25 ............................................................................ 14
5.2 Kit C - spare-part no. 43 37 23 ............................................................................ 17
5.3 Kit D - spare-part no. 43 37 24 ............................................................................ 20

4 Service Manual
For internal use only
1. Safety
Danger!
Repairs may only be carried out by a qualified electrician!
Improper repairs can be extremely dangerous for the user.
It is essential that you observe the following instructions in order to prevent electric shocks:
• The casing and the frame may be live in the event of faults!
• Touching live components inside the appliance may cause dangerous currents to flow through your
body!
• Disconnect the appliance from the mains prior to carrying out any repair work!
• When inspecting live parts, a residual current circuit breaker must always be used!
• The earthed conductor resistance must not exceed the resistance specified in the standard! It is vital
for ensuring the safety of persons 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 in accordance with the corresponding regulations for
your country!
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.
Attention!
Sharp edges: Use protective gloves.
Components may be electrostatic!
Observe handling precautions!

Service Manual 5
For internal use only
2. Temperature sensor faults
If the NTC temperature sensor develops a fault, the corresponding symbols will be shown in the displays
of the various electronic devices.
2.1 Fault checking
Attention!
Repairs may only be carried out by qualified electricians or specialists!
Attention!
Disconnect the appliance prior to commencing with work!
1. Pull the plug out of the socket and keep the doors closed for as long as possible.
2. Switch off the temperature sensor consumers in the electronics system.
3. Position a thermometer near the temperature sensor or so that it makes contact with the
temperature sensor (place the thermometer in the centre zone of the evaporator plate for
evaporator sensors).
4. At the same time measure the resistance at the ends of the connector.
5. Compare the reading of the temperature and the temperature of the resistance measured (see
following chart).
6. The temperature sensor will not need to be replaced if the two temperatures vary by a max of + or
- 10°C. In this case the contact may be faulty, so please check the wiring of the sensor and the
contacts of its connector with the electronic unit. Otherwise the temperature sensor will be defect
and will need to be replaced. Please refer to the table of appliances shown on page 8 for the
correct order number.
7. Repeat items 3 to 6 for each individual temperature sensor.
2.2 Features of the temperature sensor
Temperature in °C Resistance (ohms) Temperature in °C Resistance (ohms)
-40 90721 -30 47606
-39 84867 -29 44735
-38 79431 -28 42056
-37 74381 -27 39556
-36 69686 -26 37221
-35 65320 -25 35039
-34 61258 -24 32999
-33 57475 -23 31092
-32 53952 -22 29307
-31 50668 -21 27637

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-20 26072 11 5087
-19 24600 12 4851
-18 23221 13 4626
-17 21928 14 4414
-16 20715 15 4213
-15 19577 16 4022
-14 18509 17 3840
-13 17506 18 3668
-12 16564 19 3505
-11 15678 20 3350
-10 14845 21 3202
-9 14059 22 3062
-8 13320 23 2929
-7 12624 24 2802
-6 11969 25 2682
-5 11352 26 2567
-4 10770 27 2458
-3 10222 28 2354
-2 9705 29 2255
-1 9218 30 2161
0 8758 31 2071
1 8322 32 1985
2 7911 33 1904
3 7523 34 1826
4 7156 35 1752
5 6809 36 1681
6 6481 37 1614
7 6171 38 1549
8 5877 39 1488
9 5600 40 1429
10 5337
Temperature in °C Resistance (ohms) Temperature in °C Resistance (ohms)

Service Manual 7
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8 Service Manual
For internal use only
3. Schedule of sensor installation
Defect NTC temperature sensor
Model PNC Date
As at 09.2006
Kit
no.
Proj.
position
Spare
part. no.
Kit no. Proj.
position
Spare part.
no.
Kit no. Proj.
position
Spare
part. no.
Kit no. Proj.
position
Spare
part. no.
Kit no. Spare part.
no.
Note
IKEF238-5 92345700700 20040514 C 433723 C 433723 D 433724 Kit not available Not available
IKEF238-5 92345700700 20040702 C 433723 C 433723 D 433724 Kit not available Not available
IKEF238-5 92345700700 20050520 C 433723 C 433723 D 433724 Kit not available Not available
IKEF238-5 92345700700 20050715 C 433723 C 433723 D 433724 Kit not available Not available
IKEF238-5 92345701500 20060331 C 433723 C 433723 D 433724 Kit not available Not available
IKEF238-5 92345701600 20060623 C 433723 C 433723 D 433724 Kit not available Not available
IKEF248-5 92352401000 20040514 C 433723 C 433723 D 433724 Kit not available Not available
IKEF248-5 92352401000 20040702 C 433723 C 433723 D 433724 Kit not available Not available
IKEF248-5 92352401000 20050513 C 433723 C 433723 D 433724 Kit not available Not available
IKEF248-5 92352401001 20051028 C 433723 C 433723 D 433724 Kit not available Not available
IKEF308-5Z3 92570365900 20050311 C 433723 C 433723 B 1 433725 B 1 433725 Not available 2 compressors
IKEF308-5Z3 92570365900 20060414 C 433723 C 433723 B 1 433725 B 1 433725 Not available 2 compressors
IKEF308-5Z3 92570367000 20060424 C 433723 C 433723 B 1 433725 B 1 433725 Not available 2 compressors
IKE309-5-2T 92569665500 20050415 B 4 433725 Kit not available Kit not available Kit not available Kit not available
IKE309-5-2T 92569666000 20060414 B 4 433725 Kit not available Kit not available Kit not available Kit not available
IKE309-5-2T 92569666100 20060609 B 4 433725 Kit not available Kit not available Kit not available Kit not available
IKE318-4-2T 92570065900 20010216 B 2 433725 Kit not available Kit not available Kit not available Kit not available
IKE318-4-2T 92570065901 20010926 B 2 433725 Kit not available Kit not available Kit not available Kit not available
IKE318-4-2T 92570065902 20030124 B 2 433725 Kit not available Kit not available Kit not available Kit not available
IKE318-4-2T 92570065903 20030606 B 2 433725 Kit not available Kit not available Kit not available Kit not available
IKE318-4-2T 92570068000 20040402 B 2 433725 Kit not available Kit not available Kit not available Kit not available
IKE318-4-2T 92570068001 20040514 B 2 433725 Kit not available Kit not available Kit not available Kit not available
IKE318-4-2T 92570068002 20040924 B 2 433725 Kit not available Kit not available Kit not available Kit not available
IKE318-4-2T 92570068003 20050225 B 2 433725 Kit not available Kit not available Kit not available Kit not available
IKE318-5-2T 92570166800 20060324 B 5 433725 Kit not available Kit not available Kit not available Kit not available
IKE318-5-2T 92570167000 20060602 B 5 433725 Kit not available Kit not available Kit not available Kit not available
IKE339
IKE458-4-4T 92578170100 20040910 B 8
433725 Not available Not available
D 433724 C 433723
ITE239-0 92275471300 20060519
Not available Not available
B 3 433725
Not available
Freezer airAir 0°CRefrigerator evaporatorRefrigerator air

Service Manual 9
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4. Projection positions
Position 1
Position 2

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Position 3
Position 4

Service Manual 11
For internal use only
Position 5
Position 6

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Position 7
Position 8

Service Manual 13
For internal use only
Position 9

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5. Instructions for replacing a sensor
5.1 Kit B - spare-part no. 43 37 25
The service kit consists of:
• Temperature sensor for the service
• Housing cover for temperature sensor
• Screw cover
• Fixing screw
• 50 mm heat shrink tubing
• 2 x 15 mm heat shrink tubing
• Instruction sheet
Warning!
Unplug the appliance, before carrying out the operations!
Please replace a defect sensor as follows:
1. Identify the indentation on the compartment wall (see figure
and the section on projection positions).
2. Drill a 10 mm hole in the compartment just next to the indentation.
3. Cut the cable of the faulty temperature sensor.

Service Manual 15
For internal use only
4. Take the cable with some pliers (note: the faulty sensor must
not be removed from the inside of the compartment).
5. Pull out the cable of the temperature sensor.
6. Cut and remove the sleeve according to the measures shown
in the figure.
7. Solder the two cables.
8. Insert the cable into the 50 mm heat shrink tubing.

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9. Insert the cables of the new temperature sensor into the two
15 mm heat shrink tubings.
10. Solder the cables of the new temperature sensor with the
cables of the cable pulled out before.
11. Warm up the two heat shrink tubings to insulate the 2
soldered junctions.
12. Warm up the 50 mm heat shrink tubing to insulate the cables
with the junctions.
13. Fit the new sensor into the cover of the housing and fit the
cable as shown in figure.

Service Manual 17
For internal use only
14. Insert the element P in the hole previously drilled in the
compartment (where the cable comes out).
15. Fit the cover in the rectangular seat in the compartment (if no
seat is there, place the cover so as not to interfere with the
drawers and/or with the shelves) and fix it with the screw
supplied with the kit.
16. Fit the screw cover.
5.2 Kit C - spare-part no. 43 37 23
The service kit consists of:
• Temperature sensor for the service
• 50 mm heat shrink tubing
• 2 x 15 mm heat shrink tubing
• Instruction sheet
Warning!
Unplug the appliance, before carrying out the operations!

18 Service Manual
For internal use only
Please replace a defect sensor as follows:
1. Remove the shelves and/or the drawers. Remove the protec-
tion grid of the temperature sensor.
Note! The protection grid might be different
according to the appliance.
2. Remove the faulty temperature sensor.
3. Cut the cable of the faulty temperature sensor.
4. Cut and remove the sleeve according to the measures shown
in the figure.
5. Solder the two cables.

Service Manual 19
For internal use only
6. Insert the cable into the 50 mm heat shrink tubing.
7. Insert the cables of the new temperature sensor into the two
heat shrink tubings.
8. Solder the cables of the new temperature sensor with the
cables of the cable pulled out before.
9. Warm up the two heat shrink tubings to insulate the 2
soldered junctions.
10. Warm up the 50 mm heat shrink tubing to insulate the cables
with the junctions.
10

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11. Fit the new sensor into its original housing.
5.3 Kit D - spare-part no. 43 37 24
The service kit consists of:
• Temperature sensor for the service
• 50 mm heat shrink tubing
• 2 x 15 mm heat shrink tubings
• Instruction sheet
Warning!
Unplug the appliance, before carrying out the operations!
Please replace a defect sensor as follows:
1. Remove the shelves and/or the drawers. Access the faulty
temperature sensor.
Note! The support of the temperature sensor
might be different according to the
appliance.
2. Cut the cable of the faulty temperature sensor.