Kuppersbusch EKE 8752.0 User manual

Touch-Control electronics
with slider function
EKE 8752.0 EKE 8752.0
EKEF 8752.0 EKE 8852.0
EKEF 8852.0 (TE) EKE 9852.0 (TE)
EKE 6542.0

Service Manual: H1-68-02
Responsible: D. Rutz KÜPPERSBUSCH HAUSGERÄTE AG
Email: dieter[email protected]
Tel.: [phone] Kundendienst
Fax: [phone] Postfach 100 132
Date: 30.4.08 45801 Gelsenkirchen

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Contents
1. Safety...............................................................................................................................4
2. General Information ....................................................................................................... 5
3. Overview EKE 80 cm .....................................................................................................6
4. Overview EKE 90 cm .....................................................................................................7
5. Overview EKE 6542.0 ..................................................................................................... 8
6. Touch-Control operations .............................................................................................9
6.1 Putting the hob into operation ...............................................................................9
6.2 Turning the hob on ................................................................................................9
6.3 Power settings.......................................................................................................9
6.4 Selecting the power setting by pressing the key .................................................10
6.5 Worth knowing about the slider (touch control)...................................................10
6.6 Switching off........................................................................................................11
6.7 Automatic boost function.....................................................................................11
6.8 Multiple-circuit cooking zones .............................................................................12
6.9 Frying zones........................................................................................................12
6.10 Cleaning lock (safe function)...............................................................................12
6.11 Childproof lock.....................................................................................................13
6.12 Operation duration time limiter (automatic safety cut-off)....................................13
6.13 Residual heat display ..........................................................................................14
6.14 Timer...................................................................................................................14
6.15 STOP function.....................................................................................................15
7. The menu.......................................................................................................................16
8. Special features of the EKE 6542.0.............................................................................17
9. Relay..............................................................................................................................17
10. Pan recognition sensor (only EKE 8852 and EKEF 8852) ........................................18
10.1 Temporarily deactivating the pan recognition sensor manually ..........................18
10.2 Calibrating the pan recognition sensor................................................................18
10.3 Sensor locks........................................................................................................19
11. Excessive temperature cutoff ..................................................................................... 20
12. Error messages ............................................................................................................20
13. Wiring diagrams ...........................................................................................................21
13.1 EKE 6452 / EKE 8452 ........................................................................................21
13.2 EKE 6452 / EKE 8452 clamp connection schedule.............................................22
13.3 EKE 8752 / EKE 8852 ........................................................................................23
13.4 EKE 6452 / EKE 8452 clamp connection schedule.............................................24
13.5 EKE 8752 / EKE 8852 ........................................................................................25
13.6 EKE 9852 ...........................................................................................................26
13.7 EKE 9852 clamp connection schedule ...............................................................27
13.8 Mains cables .......................................................................................................28
14. Technical data...............................................................................................................28
15. Allocation for operation to relay outputs...................................................................29

4H1-68-02
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1. Safety
Danger!
Repairs must be carried out by a qualified expert!
Incorrect 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 the corresponding regulations for your country!
It is essential that 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 circuit breaker.
Attention!
Sharp edges: use protective gloves.
Components may be electrostatic!
Observe handling regulations!

H1-68-02 5
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2. General Information
Changing the specification or attempts to modify the product are dangerous. For your own safety spare
parts should be installed by an authorised, qualified specialist. The manufacturer accepts no liability for
damage which occurs as a result of improper installation or failure to observe currently-valid regulations
for this type of application. Please read through the installation instructions carefully prior to commencing
with work.
2.1 Safety instructions
2.1.1 General information on the hob
• Do not place empty pots and pans on cooking zones which have been switched on. Avoid boiling the
pots dry as there is a risk of the pots overheating!
• Take care when using simmering pans as simmering water may dry up unnoticed, resulting in
damage to the pot and to the hob for which no liability will be assumed.
• Overheated fats and oils may spontaneously ignite. Always supervise the preparation of food with
fats and oils. Never extinguish ignited fats and oils with water! Put the lid on the pan and switch off the
cooking zone.
• The glass ceramic surface of the hob is extremely robust. You should, however, avoid dropping hard
objects onto the glass ceramic hob. Sharp objects which fall onto your hob might break it.
• Take care when working with home appliances! Connecting cables must not come into contact with
hot cooking zones.
• The glass ceramic hob should not be used as a storage area.
• Do not put aluminium foil or plastic onto the cooking zones. Keep everything which could melt, such
as plastics, foil and in particular sugar and sugary foods away from hot cooking zones. Use a special
glass scraper to immediately remove any sugar from the ceramic hob (when it is still hot) in order to
avoid damaging the hob.
• Do not place combustible, volatile or heat deformable objects directly underneath the hob.
• Never use the cooking zones to heat up unopened tins of food or packaging made of material
compounds. The power supply may cause them to burst!
• Keep the sensor keys clean since the appliance may consider dirt to be finger contact. Never put
anything (pans, tea towels etc.) onto the sensor keys!
• Avoid repeated burning of contaminations.
2.1.2 Concerning persons
• This appliance is not intended to be used by persons (including children) with physical, mental or
sensory impairments or by persons (including children) who lack the required experience or know-
how, unless such persons are supervised by a person responsible for their safety or have been given
instructions on how to use the appliance by a person responsible for their safety.
• Children should be supervised in order to ensure that they do not play with the appliance.
Attention! The surfaces of the heating and cooking zones become hot during use. Keep small
children away at all times.

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3. Overview EKE 80 cm
21 20 22 19 14 12 11 10 8 9
24 25 13 15 23 16 17 18
1. Cooking zone 21cm / 17.5cm / 12cm / 2.3 kW
2. Cooking zone 18cm / 12cm / 1.7 kW
3. Cooking zone 18cm / 1.8 kW
4. Cooking zone 14.5cm / 1,2 kW
5. Cooking zone 14.5cm / 1.2 kW
6. Touch-control operating panel
7. Glass ceramic hob
8. ON key
9. Control lamp (hob switched on)
10. OFF key
11. Symbol for locating the position of a cooking
zone on the glass ceramic hob
12. Plus-Minus key
13. Power setting display
14. Circuit activation key
15. Multi-circuit control lamp
16. STOP/GO key
17. Key sensor (lock key)
18. Control lamp lock
19. Automatic boost function key
20. Timer control keys
21. Timer key
22. Timer indicator lamp
23. Control lamp for a selected cooking zone
24. Timer display
25. MENU key

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4. Overview EKE 90 cm
1. Cooking zone 18cm / 12cm / 1.7 kW
2. Cooking zone 18cm / 1.8 kW
7. Glass ceramic hob
8. Cooking zone 18cm / 1.8 kW
9. Cooking zone 14.5cm / 1,2 kW
10. Cooking zone 27cm / 21cm / 14.5cm / 2.7 kW
11. ON key
12. Control lamp (hob switched on)
13. OFF key
14. Symbol for locating the position of a cooking
zone on the glass ceramic hob
15. Plus-Minus key
16. Power setting display
17. Circuit activation key
18. Multi-circuit control lamp
19. STOP/GO key
20. Key sensor (lock key)
21. Control lamp lock
22. Automatic boost function key
23. Timer control keys
24. Timer key
25. Timer indicator lamp
26. Control lamp for a selected cooking zone
27. Timer display
28. MENU key

8H1-68-02
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5. Overview EKE 6542.0
1. Cooking zone 21cm / 17.5cm / 12cm / 2.3 kW
2. Cooking zone 14.5cm / 1,2 kW
3. Cooking zone 14cm / 14x24 cm / 2.3 kW
4. Cooking zone 18cm / 1.8 kW
5. Touch-control operating panel
6. Glass ceramic hob
7. ON key
8. Control lamp (hob switched on)
9. OFF key
10.Symbol for locating the position of a cooking
zone on the glass ceramic hob
11. Plus-Minus key
12. Power setting display
13. Circuit activation key
14. Multi-circuit control lamp
15. STOP/GO key
16. Key sensor (lock key)
17. Control lamp lock
18. Automatic boost function key
19. Timer control keys
20. Timer key
21. Timer indicator lamp
22. Control lamp for a selected cooking zone
23. Timer display

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6. Touch-Control operations
6.1 Putting the hob into operation
The displays are switched on for approx. 1 second when the power supply is switched on. The software
versions of the processors will then be shown for approx. 3 seconds.
A "P" will appear in the timer display.
The software version of CPU2 will appear in the 2 power setting displays.
The software version of CPU1 will appear in the 3. and 4. power setting displays.
The hob type setting will then be shown (only for hobs with 5 cooking zones):
"t" will appear in the timer display.
The type number will be shown in the power setting display.
"8752"
"8852"
"9852"
During this phase basic calibration of the keys is carried out!
Important: The sensors must not be covered up!
Once calibration has been completed, the hob displays will show "OFF". This means that the operator
needs to press the OFF sensor in order to confirm that the sensors were not covered up. If this is not
confirmed, calibration should be repeated by switching the power off and then on again.
6.2 Turning the hob on
The hob is switched on by pressing the ON sensor for approx. 1 second. The corresponding LED will
light up. A short signal will also sound in confirmation.
If no cooking zone is activated within 10 seconds of being switched on, a continuous signal will sound
for another 10 seconds. If no cooking zone is activated within this time either, the hob will switch off.
6.3 Power settings
The heating power of the cooking zones can be set at various power levels. When the slider is pressed
for the first time (the cooking zone must be switched off beforehand), it will react to the quickstart key.
Depending on where it is touched, one of three settings will be selected:
Left: Power setting 1
Middle: Power setting 5
Right: Power setting 9
After this, touching the slider will set the power level, depending on where and how it is touched.

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6.4 Selecting the power setting by pressing the key
The ceramic glass hob is operated with touch control sensor keys. The sensor keys are operated as
follows: lightly touch a symbol on the surface of the ceramic glass plate. A buzzer will indicate when the
controls have been operated correctly. The touch control sensor key will then be indicated as “key”.
A higher or lower power setting can made between 1 and 9.
If you leave your finger on the key, the power setting will be raised or lowered after a short delay,
depending on the position of your finger. The adjustment speed is calculated dynamically from the touch
position. If your finger leaves the area shown on the glass to the left or to the right, incrementation/
decrementation will be deactivated.
6.5 Worth knowing about the slider (touch control)
In principle, the slider functions the same as the touch controls; the only difference is that you can put
your finger on the glass ceramic surface and then move it around. The touch control recognises this
movement and raises or lowers the display setting (power level) in accordance with the movement.
The “slider” is given this name because of the pushing or sliding movement.
.
What must be observed when operating touch controls?
Your finger should not be placed flat onto the glassceramic surface in order to avoid adjacent keys/touch
controls from reacting by mistake.
Press the slider lightly or move your finger around
You can press the touch control very lightly with your finger; when this is done the setting on the display
(power level) will gradually change.
When you put your finger on the touch control and then move it to the left or right, the display setting will
change progressively. Sliding your finger from plus to minus (or from minus to plus) will activate the
slider function. This function will lock the other two functions. A quiet signal indicates that the slider
function is active.
Sliding your finger from left to right will raise the power settings by 1 – 3 levels; sliding your finger from
right to left will lower the power setting by 1 – 3 levels.
The slide function must be carried out at a certain rhythm, since the sliding of afinger must be recognised
within 0.4 seconds. The sliding movement must also be completed within one second. Fewer power
settings will be changed if you slide your finger over the sensor too quickly or if you interrupt the sliding
movement.
Slider (touch control)
sensor
sensor
vitroceramic
finger
finger
sensor
sensor
vitroceramic
wrong right

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The faster the movement, the faster the change in the display.
6.6 Switching off
If the slider is kept pressed in the minus zone for another 2 seconds at power level 1, the cooking zone
will be switched off and a "0" will be shown in the display for 2 seconds.
The cooking zone will only be switched on again when it has been recognised that the slider is not being
pressed.
Pressing the plus and minus zones of the slider simultaneously will switch the hob off (function as
specified above).
If all the cooking zones have been switched off, the hob will remain in the standby mode for approx. one
minute (LED on the ON key lights up). If no cooking zone is reactivated during this time, the standby
mode will switch off and the LED in the ON key will go off.
6.7 Automatic boost function
A central key next to the timer block can be used to activate the automatic boost function for each
cooking zone. To activate the function, press the parboil key and then select the simmering setting with
the slider within 5 seconds, or press the parboil key within 5 seconds of making a power setting. This will
activate the automatic boost function for this cooking zone. An "A" and the simmering setting will
alternate in the power setting display.
The automatic boost function can be switched off by means of decrementing the power setting
30 seconds after activating the automatic boost function. Selecting power setting 9 will also switch off
the automatic boost function function.
Parboiling takes place at power level 9 with the automatic boost function. After a certain time the power
level will switch down automatically to a lower simmering setting (1 to 8).
Heating-up times
touch move
Cooking level
Setting
Automatic boost
function
Time (min:sec)
1
2
3
4
5
6
7
8
9
01:22
02:44
04:06
05:27
06:50
01:22
02:44
02:44
- : -

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6.8 Multiple-circuit cooking zones
For cooking zones with several heating circuits, the additional heating circuits can be activated by
pressing the circuit activation key. The control lamp (circuit activation) in the respective power level
display blinks or lights up.
Second heating circuit activated: the control lamp blinks.
Third heating circuit activated: the control lamp lights up.
Two-circuit / three-circuit connection of the respective cooking zone can only be effected after the
corresponding cooking zone has been switched on.
For triple-circuit cooking zones, the second heating circuit is activated when the circuit activation key is
pressed for the first time. Pressing the circuit activation key a second time will also activate the third
heating circuit. Pressing the circuit activation key again will switch the third and second circuit off again.
When the hob is switched off, the information about the activation of the outer cooking zone circuits is
deleted.
6.9 Frying zones
The frying zone is activated by pressing the fryer key allocated to the cooking zone for cooking zones
that are activated together with a second cooking zone to become a frying zone. The decimal point is
activated in the power setting display. The heating elements belonging to the frying zone are now jointly
controlled by the touch control with the fryer keys. If the corresponding cooking zone had already been
activated, the display will be deleted and the keys deactivated (control is by means of the other cooking
zone). If the frying function is deactivated by pressing the fryer key, the cooking zone with the fryer key
will continue to operate at the power level set. The corresponding cooking zone will be switched off and
can be used independently again by operating the slider.
6.10 Cleaning lock (safe function)
The keys may be locked for approx. 10 - 15 seconds in order to clean the sensor keys. Press the sensor
with the key for at least 2 seconds in order to activate the cleaning lock.
The control lamp (lock) on the lock key will light up. The sensor keys will be available as usual once the
time has lapsed.
The time will be extended keys are pressed while the SAFE function is activated. The SAFE function is
only maintained for 5 seconds if no other keys are pressed.
When the SAFE function as been activated, "SAFE" will appear in the display on the four power level
displays on the left.
When the SAFE function is active, the hob can be switched off by pressing the OFF key for 3 seconds.
The childproof lock can be called up from the SAFE function by pressing the key sensor for another
2 seconds. "Child" and "SAFE" will alternate in the display while the SAFE function is still active.

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6.11 Childproof lock
The childproof lock is activated by pressing the key sensor for approx. 2 seconds after the SAFE function
has been activated. An activated childproof lock function is displayed with the LED on the key sensor.
The plus zone of the slider and the circuit activation keys as well as the timer slider and the ON key are
deactivated. "Child" will appear in the 7-segment displays if these sensors are nevertheless operated.
Furthermore, the 3 LEDs will also show which combination of keys will need to be used to deactivate the
child function.
The childproof lock can be deactivated by switchng off the power supply or by pressing the sensor
combination of key sensor plus and minus sensor for cooking zone 1 + minus sensor for cooking zone
5 (cooking zone 4 for hobs with 4 circuits) for 3 seconds.
The power settings can be switched down or thecooking zone orthe entirehob canbe switched offwhen
the childproof lock is activated.
Please note! The childproof lock will be cancelled, i.e. deactivated in the event of a power cut.
6.12 Operation duration time limiter (automatic safety cut-off)
The time limit function operates for each cooking zone separately. The duration of continuous use of
each cooking zone depends on the cooking level selected (see chart), provided that the setting of a
respective cooking zone is not adjusted during use. If the automatic safety cut-off (limiting operation
duration time) has been activated, the cooking zone will switch off, a short signal will sound and an H will
appear in the display.
The time will re-commence on changing a setting!
When a cooking zone is switched off a signal will sound for 1 second due to the operation duration time
limit.
Power setting Operation time limit
(hours)
1
2
3
4
5
6
7
8
9
10
5
5
4
3
2
2
2
2

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6.13 Residual heat display
There is a metre for each cooking zone.
If the heater is switched on, a certain figure will be added, depending on the count shown on the metre:
The metre is limited to 25440.
If the heater is switched off, a certain figure will be deducted, depending on the count shown on the
metre.
The residual heat metres are switched off when the power supply is switched off!
When a cooking zone is switched off, the corresponding power setting display will show an "H" (hot)
when the corresponding metre is at > 5000.
6.14 Timer
The timer can be set simultaneously for all the cooking zones (with individual time settings) and can also
be set as a minute minder.
Pressing the timer key will the switch through time setting for the minute minder and the timer setting of
the different cooking zones in sequence (from left to right in sequence).
A timer can only be selected for cooking zones that have been switched on. The timer will show the
remaining time for the cooking zone or the minute minder, and the timer LED will blink. If several timer
settings have been defined, the timer key may be used to switch the display (as for setting from left to
right, starting with the timer LED which is currently blinking). For cooking zones (or the minute minder)
for which the timer has been activated but is currently not shown, the corresponding timer LED will light
up constantly. If, in the case of several activated timers, the one currently being shown has expired, the
display will automatically be switched to the next timer (the next one to the right of the one just finished).
If a timer is re-selected, the time display will indicate a "0". The plus and minus keys of the time can be
used to pre-set the time in this status. In this case the keys have the following functions:
- Minus key: time of 1 minute
- Plus key: time of 60 minutes
- In the middle between the
plus and the minus keys: time of 30 minutes
Pressing the plus and the minus zones of the timer simultaneously will directly reset the timer setting to
"0".
If a time has expired, the signal for completion will sound until it is acknowledged by pressing any key or
until it stops itself after 2 minutes.
The LED of the expired timer will blink the time at faster intervals.
Completion signal: 100 ms signal => 25 ms interval
100 ms signal => 25 ms interval
100 ms signal => 2000 ms interval

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6.14.1 Changing the timer setting
The timer setting can be changed at any time when the timer is in operation. The change is made with
the following sensor functions:
- Pressing the plus or the minus key will raise or lower the time in minutes.
- The time will be changed if you leave your finger on a sensor. The adjustment speed and the direc-
tion are calculated dynamically from the touch position.
- Sliding your finger from plus to minus (or from minus to plus) will activate the slider function. This
function will lock the other two functions. A quiet signal indicates that the slider function is active.
Sliding your finger from left to right will raise the time by 1 – 10 minutes; sliding your finger from right
to left will lower the time by 1 – 10 minutes. The slide function must be carried out at a certain
rhythm, since the sliding of a finger must be recognised within 0.4 seconds. The sliding movement
must also be completed within one second. Fewer minutes will be changed if you slide your finger
over the sensor too quickly or if you interrupt the sliding movement.
6.15 STOP function
The cooking process can be interrupted for 30 minutes with the STOP function, for example if the
doorbell rings. The STOP function must be released in order to continue cooking at the same power
level. A timer which has been set will not be stopped.
This function is only available for 30 minutes for reasons of safety. The hob will then be switched off.
Pressing the stop/go key for 3 seconds will switch off the heaters and in the 7-segment display, "STOP"
will alternate with the power levels previously set.
In order to reactivate the cooking zones, the stop/go key must first of all be pressed for one second, and
then the on/off key must be pressed for one second within a period of five seconds (the LED next to the
key will blink as a reminder to press the key).
The minute minder will continue to operate when the stop function has been activated. The switch-off
timers for the cooking zones are frozen for the duration of an activated stop function.

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7. The menu
Generally the slider will currently only operate for individual menu steps. This means that after each
change the key will need to be pressed again to make another setting.
When the menu key is pressed the time display will show F1. Pressing the plus or minus zones of the
timer slider will enable switching between F1, F2 and F4 (F3 is skipped if no of no pan recognition
function has been installed). The respective current setting will appear in the power setting displays
(possibly with a code in front). For F4 four zeros will appear in the power setting displays. The
corresponding plus orminus zone of the respective slider is used to enter the code for enabling thecode-
protected menu items (1147). Touching the menu key lightly will confirm the entry.
If the code has been entered correctly, the current setting of the demonstration mode will appear in the
power setting displays. If the code is incorrect the code number will be deleted and four zeros will be
shown again.
7.1 Menu items and their significance
If the OFF key in the menu is pressed when the hob is switched on, the menu will be exited without any
storing and the hob will be switched off. Timeout (30 seconds) can be awaited to leave the menu without
storing settings and without the hob being switched off.
Menu item Code Settings
F1 (safety cut out) S 1. Normal cut-out after the maximum operation
time
2. Reminder function 1 (after 20 minutes an alarm
buzzer will sound ever 10 minutes until it is
acknowledged)
3. Reminder function 2 (after 20 minutes an alarm
buzzer will sound ever 10 minutes until it is
acknowledged) If no acknowledgement has fol-
lowed after 5 minutes -> switch off the hob)
F2 (display brightness)
Key beep volume, set with the
tone pitch, for 5-zone hobs only
h
L1…9 1 = deep, 9 = high 1…8 1 = soft, low frequency
8 = loud, high frequency
F3 (pan recognition sensor
deactivated) (only for hobs with a
pan recognition sensor)
0: Pan recognition sensor activated
1: Pan recognition sensor deactivated
F4 (code) 0000….9999 (code: 1147)
Once the correct code has been entered
F4 (demonstration mode) d Demonstration mode deactivated
1: Demonstration mode activated (relays remain off)
F5 (type setting)
(only for 5-zone hobs) 3: 8752 (only selectable for 5-zone fronts)
4: 8852 (only selectable for 5-zone fronts)
5: 9852 (only selectable for 5-zone fronts)
F7 (calibration and pan
recognition) only for hobs with a
pan recognition sensor
u 0: Do not calibrate
1: Calibrate, parameter will automatically
be switched back to 0.

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8. Special features of the EKE 6542.0
The EKE 6542.0 with four cooking zones has no menu key, so that all the functions are occupied by other
keys or combinations of keys.
The menu will be activated when the timer and the automatic boost function are pressed simultaneously
for five seconds.
An adjustment to a parameter can be acknowledged and stored with the automatic boost function key.
The 4-zone hob does not have the following menu settings:
-F2
-F3
-F5
9. Relay
The relay for universal switch-off (K101, K105, K111) are switched on at the same time when the hob is
switched on. These relays are switched off together when the hob is switched off.
The relays for the heating circuits are clocked in accordance with the power setting
Cooking zone cycle times (cycle time of 47seconds)
In order to prevent several relays from switching on or off at the same time, the relays are always
processed in internals of 90 ms. This maintains the switching procedure for the triple-circuit zones at
below 200 ms.
If the power setting is moved upwards when a cooking zone has been activated, the current cycle will
be disrupted for the respective zone and a new cycle will be started so that the heater is switched on
immediately.
If the power settingis moved downwards when a cooking zone has been activated, the remaining current
cycle of the heater will be switched off immediately for this particular cooking zone and the interval will
commence.
Setting Switch-on time
1 1.3 seconds
2 3.5 seconds
3 5.7 seconds
4 8.7 seconds
5 11.2 seconds
6 14.0 seconds
7 21.2 seconds
8 28.2 seconds
9 47 seconds

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10. Pan recognition sensor (only EKE 8852 and EKEF 8852)
The pan recognition sensor is automatically activated as soon as the expansion board "for pan
recognition" has been inserted. This can be recognised on the touch control as soon as the menu is
opened. If a pan recognition sensor has been installed, the menu items F3 and F7 will be faded in.
The pan recognition sensor will only be activated when the F3 parameter is set at 0 (activated).
Hob operation changes as follows when the pan recognition sensor is activated:
- If the cooking zone is switched off and there is no pan on the cooking zone or if a pan placed on the
cooking zone is too small, a "u“ will be shown in the display.
- If a cooking zone is switched on and there is no pan on the zone or if a pan placed on the cooking
zone is too small, there will be no transmission of power. A blinking “u” in the cooking level display
points this out.
- If a suitable pot or pan is placed on the cooking zone, the power setting will switch on and the power
setting display will light up. The power supply will be cut off when the pan is removed and the power
setting display will indicate a blinking "u“.
If the pots and pans placed on the cooking zone are smaller, and the pan recognition sensor still
switches on, only the amount of power required will be supplied.
- If a cooking zone is switched on an no pot or pan is placed on the cooking zone for one minute, the
zone will be switched off again.
Important! It is essential that after using a cooking zone you switch it off with the respective
minus key and not just with the pan recognition device.
Pan recognition limits
For some of the models the minimum diameter of the base of a pot is indicated as an inner circle on the
cooking zones.
Cooking zone diameter Minimal diameter of the saucepan bottom
145 mm 90 mm
180 mm 120 mm
210 mm 135 mm
10.1 Temporarily deactivating the pan recognition sensor manually
The pan recognition sensor can be deactivated manually by pressing the plus and minus keys of the
cooking zone simultaneously before the zone is switched on. A "u" will then appear in the display (not
underlined). If the zone is then switched on, the pan recognition sensor will be temporarily deactivated
for this cooking process.
Temporary deactivation of the pan recognition sensor will be deleted again as soon as the cooking zone
is switched off. When the pan recognition sensor is deactivated the cooking zone must be switched on
within 30 seconds; if it is not switched on, deactivation will be deleted.
10.2 Calibrating the pan recognition sensor
The pan recognition sensor will need to be calibrated every time a change is made to the sensor. This
may occur when the hob is initially produced, when the controls or the heater are replaced (and hence
also the sensor) or when a sensor cable is replaced.

H1-68-02 19
For internal use only
The pan recognition sensor can be calibrated from two operating modes.
- After the hob has been switched on, when "OFF" is shown in the display, the pan recognition sensor
can be calibrated by pressing the key sensor (lock) for a long time. The display will then show CALt
for 2 seconds.
Calibrated data is permanently stored in the EEPROM of the pan recognition sensor.
No items may be placed on the hob during the calibration process.
10.3 Sensor locks
The lock can be used to lock key operation and cooking level settings. Only the off key can be used to
switch the hob off.
Sensor lock means that unreasonable or impermissible keys have been operated. The hob reacts to
such improper activation with an ongoing signal after 5 seconds and complete switch-off after
10 seconds. When the sensors are locked control commands are not processed.
Reasons for the sensors to lock:
- More than one key is pressed!
- When a cooking zone is switched off, sensors other than the respective plus and minus zones are
pressed.
- The plus zone is pressed when the childproof lock is activated.
- The sensor for switching on multiple-circuit cooking zones is pressed when the childproof lock is
activated.
- The corresponding minus zone is pressed when the childproof lock is activated and the cooking
zone is switched off.
- When the cooking zone is switched off the key for activating the second heating circuit is pressed
(only for cooking zones with several heating circuits).
- When a cooking zone is switched on, sensors other than the respective plus and minus zones are
pressed.
- The childproof lock has already been activated and the key sensor is still being pressed.
- The hob is already switched on and the on/off key i seither still being pressed or it is being pressed
again.
- An additional heating circuit has already been activated and the corresponding circuit activation key
is still being pressed.
- The cooking zone has already been set at level 9 and the plus zone is either still being pressed or it
is being pressed again.
- The minus zone is not released once the cooking zone has been turned down to 0.
In general
The appliance does not automatically switch on again after a power failure.
If no cooking zone is on for 1minute, the hob will switch off completely.
Attention – ONLY AS AN EXCEPTION!
The pan recognition sensor can also be calibrated with the F7 menu. Calibration will commence
when the parameter is set at "1" and the menu key subsequently operated. The parameter
display will return to "0" in this case.

20 H1-68-02
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11. Excessive temperature cutoff
The hob will be switched off if the temperature rises excessively (> 105°C) , a buzzer will sound for one
second and the timer display will show E3. As soon as the temperature drops to < 103°C, the E3 error
code will go off and the hob can be switched on again.
We are not able to influence the actual temperatures on the glass. These temperatures may be
unpleasantly high for operation and there may be a risk of burns!
12. Error messages
Error messages are shown in the timer display:
E1 Key operated for longer than 5 seconds
E2 Key operated for longer than 10 seconds
E3 Temperature sensor > 105°C
E4 IIC communication, checksum error
E5 IIC error, no longer any communication!
E6 Shifter relay output error