Electrolux DOMINO with TIGER User manual

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SERVICE MANUAL
COOKING
ã ELECTROLUX ITALIA S.p.A.
Corso Lino Zanussi, 30
Publication
number
I - 33080 PORCIA /PN (ITALY) 599 71 58-20
Fax [phone]
SOI
Edition: 05.2009 - Rev. 00
EN/SERVICE/FV
Built-in hobs
"DOMINO" MAGNETIC
INDUCTION HOBS WITH
"TIGER" CIRCUIT BOARD
AND ROTARY
CONTROLS

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TABLE OF CONTENTS
1 INTRODUCTION........................................................................................................................... 5
1.1 PURPOSE OF THIS MANUAL........................................................................................... 5
1.2 ESD - ELECTROSTATIC DISCHARGE AND ITS EFFECT ON THE COMPONENTS..... 5
1.3 GENERAL DESCRIPTION................................................................................................. 5
2 GENERAL INFORMATION.......................................................................................................... 6
2.1 COOKING USING A MAGNETIC INDUCTION HOB......................................................... 6
2.2 PAN DETECTION SYSTEM............................................................................................... 7
2.3 TYPES OF PANS FOR MAGNETIC INDUCTION COOKING ........................................... 7
2.3.1 HOW TO CHECK WHETHER A PAN IS SUITABLE ............................................... 7
2.4 DIMENSIONS OF PAN FOR MAGNETIC INDUCTION COOKING................................... 8
3 DESCRIPTION OF THE SYSTEM ............................................................................................... 9
3.1 BLOCK CIRCUIT DIAGRAM .............................................................................................. 9
3.2 "MINI" GENERATOR MODULE ......................................................................................... 10
3.2.1 JUMPER FOR CONFIGURATION OF GENERATOR MODULE ............................ 11
3.2.2 CONNECTIONS TO THE COILS (TWO-ZONE VERSION) ................................... 11
3.2.3 TIGER GENERATION MODULE: POSITIONS OF CONNECTORS...................... 12
3.3 MAGNETIC INDUCTION COILS........................................................................................ 13
3.3.1 140mm MAGNETIC INDUCTION COIL................................................................... 13
3.3.2 180 mm MAGNETIC INDUCTION COIL.................................................................. 14
3.4 NTC TEMPERATURE CONTROL OF COOKING ZONES (HOTPLATES)....................... 15
3.5 BLOCK DIAGRAM OF HOB............................................................................................... 15
3.6 COOKING ZONES (HOTPLATES) AND PAN DETECTION SYSTEM.............................. 16
3.6.1 TABLE OF HOTPLATES AND MINIMUM PAN DIAMETERS ................................. 16
3.7 COLIBRI’ CONTROL UNIT................................................................................................. 17
3.7.1 CONTROL POTENTIOMETERS ............................................................................ 18
4 TECHNICAL CHARACTERISTICS OF MAGNETIC INDUCTION HOB..................................... 19
4.1 TECHNICAL CHARACTERISTICS ................................................................................... 19
4.1.1 POSITION OF HOTPLATES.................................................................................... 19
4.1.2 TECHNICAL DATA: HOB ....................................................................................... 19
4.2 CONTROL OF COOKING ZONES..................................................................................... 20
4.3 SWITCHING ON THE HOTPLATES .................................................................................. 21
4.4 ADJUSTING THE POWER................................................................................................. 21
4.5 AUTOMATIC HOB SWITCH-OFF FUNCTION .................................................................. 21
4.5.1 SWITCHING OFF THE INDUCTION HOTPLATES ................................................ 21
5 TROUBLESHOOTING ................................................................................................................. 22
5.1 THE HOB DOES NOT SWITCH ON .................................................................................. 22
5.2 ONE OR BOTH HOTPLATES INOPERATIVE................................................................... 24
5.3 OTHER MALFUNCTIONS.................................................................................................. 25
5.4 TESTING THE FINAL STAGES OF THE POWER BOARD .............................................. 25
5.5 CHECKING THE NTC SENSORS FOR THE HOTPLATES.............................................. 26
6 ACCESSIBILITY........................................................................................................................... 27
6.1 REMOVING THE TOP........................................................................................................ 27
6.2 REMOVING THE INDUCTION COILS AND THE NTC SENSORS................................... 29
6.2.1 COIL ASSEMBLY ANCHOR SYSTEM .................................................................... 31
6.2.2 POWER SUPPLY CONNECTION TO INDUCTION COILS .................................... 31
6.2.3 REMOVING THE SUSPENSION SPRINGS............................................................ 31
6.3 REMOVING THE POWER BOARD MODULE................................................................... 32
6.4 REMOVING THE CONTROL BOARD ............................................................................... 34
6.5 REMOVING THE CONTROL POTENTIOMETER ............................................................. 35
7 CIRCUIT DIAGRAM ..................................................................................................................... 36

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GENERAL PRECAUTIONS
¾To ensure that the magnetic induction hob functions correctly, it is important to utilize saucepans that are
suitable for this type of hob and whose dimensions are suitable for those of the cooking zones as
described in chapters 2.3 and 2.4.
¾The intensity of the magnetic field generated in the cooking area of the hob is within the limits laid down
in current legislation; however, users of Pacemaker devices are advised to remain at a distance from the
cooking area when in operation.
¾Do not place magnetic data storage devices (floppy disks, memory cards, hard disks etc.) near the
cooking areas.

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1 - INTRODUCTION
1.1 - PURPOSE OF THIS MANUAL
The purpose of this manual is to provide service engineers with technical information concerning the new
magnetic induction hob fitted to free-standing cookers, enabling them to diagnose malfunctions and to repair
the appliances.
1.2 - ESD - ELECTROSTATIC DISCHARGE AND ITS EFFECT ON THE COMPONENTS
The interface for the control unit is not fitted with an internal device to protect against electrostatic discharge.
When effecting repairs, therefore, the service engineer must check for stabilization of the potential on the
oven casing (i.e. discharge any static electricity by touching the oven casing) in order to prevent the
possibility of overload, which might damage the circuit boards.
The same care is necessary when handling circuit boards supplied as spare parts (i.e. not yet fitted to the
appliance), which must be removed from the protective bag in ESD only after stabilizing the potential (i.e.
discharging any static electricity) and only then installed in the appliance.
Important: The theory behind the process of electrostatic charge and discharge is not discussed in this
Manual, since the tangible effects are considered to be more important. However, the effects are felt
frequently when touching a metal handle and feeling the electrostatic discharge in the form of a minor shock.
But what happens when stabilization of the potential takes place with semi-conductor components (i.e.
components on a circuit board, such as integrated circuits, microprocessors etc.)?
Stabilization of the potential takes place across the internal structure of the semi-conductor component. This
does not necessarily lead to the immediate destruction of the component; subsequent malfunctions across
damaged internal connections may be more harmful, and these occur only as a result of overheating or
current overloads.
It is true that almost all sensitive semi-conductor components (such as MOS circuits) have been improved
by the addition of protective measures, but the internal structures of these components are today smaller
than, for example, ten years ago, which tends to increase their sensitivity to the previous levels.
Important!
Which components are susceptible to damage by static electricity during repairs?
All circuit boards featuring control and command accesses (door switches, food probes etc.), bare tracks
and microprocessors, as well as any other circuits with free access.
Examples:
- Programmers connected to the food probe and the door switch.
- Programmers whose control processors are accessible (due to their high costs, the protective systems
are only partial).
- W.O.E.C. control units.
- S.O.E.C. control units.
- C.H.E.C. control units.
- KRONOS control units.
- Interface boards to electronically-controlled gas hob
- Induction hob board
1.3 - GENERAL DESCRIPTION
With this type of hob, the food is cooked by magnetic induction.
The system comprises a Tiger Induction electronic module with two cooking zones designed to suit
saucepans of a given type.

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2 - GENERAL INFORMATION
2.1 - COOKING USING A MAGNETIC INDUCTION HOB
In magnetic induction cooking, the heat of the hotplate is transmitted directly to the pan, in very few seconds
and using induced current. The hob itself remains relatively cool.
The high-power, high-frequency induction current is generated by an electronic circuit connected to a coil,
and generates heat that is transmitted directly to the pan.
When the pan is removed from the cooking zone, the hotplate cools immediately, as the pan no longer
absorbs the induced heat generated by the magnetic field.
The electronic control system detects the presence of the pan by measuring the impedance; when no pan is
detected on the hotplate zone, the generation of the magnetic field is interrupted.
This method of cooking offers numerous advantages. Heat dispersion is significantly reduced, and it is no
longer necessary to install a ventilation grille in the kitchen. There is no danger of scalding, nor any worry
about the possibility of having left the gas outlet on. In addition, the hob does not switch on unless there is a
pan of sufficient dimensions on the hotplate zone.
Using this technology, the method of cooking is very similar to that of a gas hob.
1- Coil generating a high-frequency magnetic
field, connected to electronic circuit.
2- The magnetic field penetrates into the
ferrous (magnetic) material of the pan,
causing the current to circulate and thus to
generate heat.
3- The heat generated inside the pan is
transmitted to the food.
4- There is no magnetic field outside the
perimeter of the pan, and when it is
removed from the hob the electronic circuit
detects that the hob is empty. When this
occurs, the generation of the magnetic
field is interrupted and the production of
heat inside the pan is interrupted
instantaneously.
Fig. 1
Figure 2 (opposite) shows a curious phenomenon.
Only the part of the egg in contact with the pan is
heated, because the magnetic field has induced the
current (and therefore the heat) only on the area
covered by the pan itself.
Fig. 2

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2.2 - PAN DETECTION SYSTEM
The circuit that generates the magnetic field also checks the impedance of the "load" (i.e. the pan). The
difference in impedance between one pan and another depends on the magnetic properties of the metal and
the dimensions of the pan. A pan made in non-magnetic metal (e.g. aluminium) will not be detected.
The minimum diameter of the pan is indicated for each hotplate, depending on its power and diameter.
2.3 - TYPES OF PANS FOR MAGNETIC INDUCTION COOKING
As described above, magnetic induction hobs require the use of special pans made using magnetic material
which creates an impedance that is higher then the minimum required for the cooking zone on which the pan
is placed.
If the pan is not of the correct type, the system will not detect the presence of the pan and will therefore not
function.
Fig. 3 illustrates an example of a pan specially built for use with magnetic induction hobs. The table below
shows the various materials used.
Fig. 3
MATERIAL SUITABLE FOR INDUCTION COOKING
Steel, enamelled steel YES
Cast iron YES
Stainless steel IF STATED BY THE MANUFACTURER
Aluminium, copper, brass NO
Glass, ceramic, porcelain NO
2.3.1 - HOW TO CHECK WHETHER A PAN IS SUITABLE
- Introduce a small quantity of water into the pan, set the hotplate to level 9 and check whether the
water is heated rapidly.
- Use a small magnet to check whether the pan is magnetic.
N.B. Certain types of pan may produce noise when used on magnetic induction hobs. This noise is not a
sign of a malfunction in the hob, and in no way affects its correct operation.
N.B. The bottom of the pan must be as thick and as flat as possible.
18/10 STAINLESS STEEL
PURE ALUMINIUM
MAGNETIC STEEL

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2.4 - DIMENSIONS OF PAN FOR MAGNETIC INDUCTION COOKING
For correct operation of the magnetic induction hob, the diameter of the pan must be suitable for the size of
the hotplate. Fig. 4 shows a pan that is ideal for the size of the hotplate.
CORRECT SIZE FOR HOTPLATE
Fig. 4
If the pan is too small for the size of the hotplate, the system will measure an insufficient impedance and
therefore will not detect the presence of the pan. The system will not generate induction, as if there were no
pan on the hotplate (see Fig. 5).
PAN TOO SMALL FOR HOTPLATE
Fig. 5
If the pan is too large for the hotplate, the heat generated by induction will be insufficient for the quantity of
mass to be heated and therefore insufficient for the cooking process (see Fig. 6)
PAN TOO LARGE FOR HOTPLATE
Fig. 6

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3 - DESCRIPTION OF THE SYSTEM
This magnetic induction hob consists of a "Tiger" power module with two generators
The module comprises two coils (one for each cooking zone), and is controlled by a COLIBRÌ control unit
board (see block circuit diagram below).
The main components of the magnetic induction generating system are as follows:
- Power board, installed inside a generator module known as "TIGER" (including cooling fan)
- Coils for generation of magnetic field (one for each cooking zone)
- NTC temperature sensors (one for each cooking zone)
- COLIBRÌ control unit (with rotary controls)
3.1 - BLOCK CIRCUIT DIAGRAM
Fig. 7
BUS Communication - BUS for communication between power board and control unit
Heat Sink - Heat dissipator for control coil final semiconductors
Induction TIGER - TIGER Induction generator module
User Interface - COLIBRÌ control unit for rotary controls

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3.2 - "TIGER" GENERATOR MODULE
The TIGER induction module is a development of the MINI module, and consists of two induction
generators.
Each module generates a maximum power of 3.6 kW on two cooking zones.
The power and size of the cooking zones (hotplates) depends on the coils used.
The module is suitable for use with hotplates (different coils) with diameters of 270mm, 210mm, 180mm and
140mm.
Each cooking zone also features the rapid heating function ("booster") with a power higher than the normal
operating power but with a limited operating time.
The module is cooled by a variable-speed fan with a rotation detection device.
Fig. 9
Fig. 10
Fig. 11 illustrates the connections for the induction module.
Fig. 11
Electrolux part
numbe
r
Temperature sensor
Main safety
relay
Power supply
connector
(N)
Power supply
connector
(L)
MACS
bus
and I am the
boss of the
com
p
an
y,
so I
Temperature sensor
for front coil
Programming
connector
(POWER)
EARTH
Temperature sensor
for rear coil
Programming
connector
(CONTROL)

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3.2.1 - JUMPER FOR CONFIGURATION OF GENERATOR MODULE
The TIGER generation module is also designed to power the COLIBRÌ control unit board. In order to enable
this function, it is necessary to install a jumper across connectors BC1 and BC5 (see fig. 12).
In this way, the module powers the control unit via the connector between the control unit and the power
board (BC3).
CONFIGURATION OF INDUCTION MODULE TO POWER THE CONTROL UNIT
Fig. 12
3.2.2 - CONNECTIONS TO THE COILS (TWO-ZONE VERSION)
The connections between the induction coils and the module which controls the two cooking zones are
shown in fig. 13.
Fig. 13
Connection to
rear coil (black) Connection to
front coil (black)
Connection to
rear coil (red)
Connection to
front coil (red)
Cooling fan

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3.2.3 - TIGER GENERATION MODULE: POSITIONS OF CONNECTORS
Fig. 15
B71 CONNECTOR FOR FRONT COIL TEMPERATURE SENSOR
B77 CONNECTOR FOR FINAL TEMPERATURE SENSOR
B81 CONNECTOR FOR REAR COIL TEMPERATURE SENSOR
BA81 PROGRAMMING CONNECTOR (CONTROL)
BA91 PROGRAMMING CONNECTOR (POWER)
BC1 CONNECTOR FOR MODULE CONFIGURATION JUMPER (*)
BC3 (NOT USED)
BC4 INSULATED COMMS CONNECTOR (TO CONTROL UNIT)
BC5 CONNECTOR FOR MODULE CONFIGURATION JUMPER (*)
BP06 FASTON - MAIN PILOT LAMP
BP09 FASTON - MAIN PILOT LAMP
BPL1 POWER SUPPLY (LIVE)
BPL2 POWER SUPPLY (LIVE)
BPN1 POWER SUPPLY (NEUTRAL)
BPN2 POWER SUPPLY (NEUTRAL)
BS1 CONNECTOR FOR COOLING FAN
EARTH1 FASTON FOR FRAME EARTH
EARTH2 FASTON FOR FRAME EARTH
TAB1 FRONT COIL POWER SUPPLY TERMINAL (BLACK)
TAB101 REAR COIL POWER SUPPLY TERMINAL (BLACK)
TAB102 REAR COIL POWER SUPPLY TERMINAL (RED)
TAB2 FRONT COIL POWER SUPPLY TERMINAL (RED)
(*) N.B.: For information regarding the configuration jumper, refer to paragraph “3.2.1 -
JUMPER FOR CONFIGURATION OF MODULE”

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3.3 - MAGNETIC INDUCTION COILS
The induction coils are inserted into an assembly which includes a support element (pos. 4, fig. 17).
A suspension spring is fitted beneath the coil assembly so that the coil is pressed upwards against the lower
surface in ceramic glass hob (pos. 6, fig. 16 and 17).
It is necessary to place a layer of heat insulating material (pos. 3, fig. 16 and 17) above the coil, and then the
NTC heat sensor and the aluminium locking tab (pos. 2 and 1, fig. 16 and 17).
3.3.1 - 140mm MAGNETIC INDUCTION COIL
Fig. 16
1 - INSULATING LAYER IN MICA
2 - ALUMINIUM LOCKING TAB FOR NTC SENSOR
3 - HEAT INSULATING LAYER
4 - NTC TEMPERATURE SENSOR
5 - COIL ASSEMBLY
6 - SUSPENSION SPRING
7 - RED CONNECTOR CABLE FOR COIL (POSITIVE)
8 - BLACK CONNECTOR CABLE FOR COIL (NEGATIVE)
9 - CONNECTOR CABLE FOR NTC SENSOR

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3.3.2 - 180 mm MAGNETIC INDUCTION COIL
Fig. 17
1 - INSULATING LAYER IN MICA
2 - ALUMINIUM LOCKING TAB FOR NTC SENSOR
3 - HEAT INSULATING LAYER
4 - NTC TEMPERATURE SENSOR
5 - COIL ASSEMBLY
6 - SUSPENSION SPRING
7 - RED CONNECTOR CABLE FOR COIL (POSITIVE)
8 - BLACK CONNECTOR CABLE FOR COIL (NEGATIVE)
9 - CONNECTOR CABLE FOR NTC SENSOR

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3.4 - NTC TEMPERATURE CONTROL OF COOKING ZONES (HOTPLATES)
The temperature of each zone is measured by an NTC sensor positioned between the coils and the ceramic
glass top (see fig. 16 and 17). In this way, the hob is protected against excessively high temperatures.
If one of the zones is found to overheat:
- If the temperature is in excess of 190°C the power is reduced to 0
- If the temperature rises above 200°C the generator module switches off and an alarm sounds
- The module can be switched on again when the temperature falls below 150°C (after error code E1 is
displayed)
If the cooking module switches off due to overheating, and the alarm sounds, the cooking zone does not
switch on again automatically. To utilize the cooking zone again, it is necessary to wait until the temperature
falls to below 150°C, after which the cooking zone can be switched on again in the normal way (i.e. using
the control panel).
The system also features an automatic system which detects the presence and correct attachment of the
connectors to the NTC sensors.
3.5 - BLOCK DIAGRAM OF HOB
To provide for two cooking zones (hotplates),
a TIGER induction module is connected to the
control unit powered by the module after being
configured appropriately via the jumper across
BC1 - BC5 (see section 3.2.1 "JUMPER FOR
CONFIGURATION OF GENERATOR
MODULE").
Fig. 18
TIGER INDUCTION MODULE - TWO-ZONE TIGER INDUCTION MODULE WITH POWER SUPPLY TO
CONTROL UNIT (FITTED WITH JUMPER BC1 - BC5)
USER INTERFACE - COLIBRI’ CONTROL UNIT WITH ROTARY CONTROLS
ZONE 1 - REAR HOTPLATE (Ø180 mm)
ZONE 2 - FRONT HOTPLATE (Ø140 mm)

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3.6 - COOKING ZONES (HOTPLATES) AND PAN DETECTION SYSTEM
The system detects the presence of a pan by measuring the inductance through the generator coil. The
inductance value depends on the diameter, the mass and the type of material used for the pan. To ensure
correct operation of the system, it is important to use a pan whose diameter is suitable for that of the cooking
zone. If the pan is too small (thus with a low inductance), it will not be detected by the system. Each cooking
zone requires the use of pans with different minimum diameters (see table below).
Fig. 19
1 - REAR HOTPLATE Ø180 mm
2 - FRONT HOTPLATE Ø140 mm
3 - COLIBRI’ CONTROL UNIT
3.6.1 - TABLE OF HOTPLATES AND MINIMUM PAN DIAMETERS
The table below lists the minimum pan diameters for the hotplates
DIAMETER OF
HOTPLATE MAXIMUM
POWER OUTPUT BOOSTER POWER (RAPID
HEATING FUNCTION) MINIMUM PAN DIAMETER
140 mm 1400W 2500W 120 mm
180 mm 1800W 2800W 145 mm

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3.7 - COLIBRI’ CONTROL UNIT
This type of control unit features a interface for control of the hotplates via the rotary potentiometer controls.
In this application, the control potentiometers are connected to connectors BK01 and BK02.
Fig. 20
Fig. 21
1 - CONNECTOR BC01 TO POWER MODULE
2 - CONNECTOR BC02 (NOT USED)
3 - LEDS (*)
4 - DISPLAY (*)
5 - CONNECTOR BK01 TO FRONT HOTPLATE POTENTIOMETER
6 - CONNECTOR BP02 FOR PROGRAMMING
7 - CONNECTOR BP01 FOR PROGRAMMING
8 - CONNECTOR BK02 TO REAR HOTPLATE POTENTIOMETER
9 - BUZZER
(*) N.B. : In this specific application, the DISPLAYS and the LEDS are hidden beneath the worktop
surround.
Power board
connectors
(MACS)
Rotary control
connector
(front cooking zone
Programming
connecto
r
Microprocessor
Rotary control
connector
(rear cooking zone)

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3.7.1 - CONTROL POTENTIOMETERS
The control potentiometers are used to select a power level by turning the knob clockwise.
Each potentiometer transmits a different resistive value to the power board; these resistive values
correspond to the various power levels for the hotplate.
ANGLE OF ROTATION
Fig. 22
Fig. 23
ELECTRICAL CONTACTS
CIRCUIT DIAGRAM
Fig. 24
Fig. 25

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4 - TECHNICAL CHARACTERISTICS OF MAGNETIC INDUCTION HOB
4.1 - TECHNICAL CHARACTERISTICS
4.1.1 - POSITION OF HOTPLATES
Fig. 26
1 - REAR HOTPLATE Ø180 mm
2 - FRONT HOTPLATE Ø140 mm
3 - CONTROL INTERFACE ZONE
4.1.2 - TECHNICAL DATA: HOB
VOLTAGE V 220 - 230
POWER ABSORPTION (PRE-HEATING) W 2
MAXIMUM POWER ABSORPTION KW 3.2
MAXIMUM POWER - Ø140 mm HOTPLATE KW 1.4
MAXIMUM POWER - Ø180 mm HOTPLATE KW 1.8
HOTPLATE POWER LEVELS N° 9

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4.2 - CONTROL OF COOKING ZONES
The cooking zones are controlled using knobs, which in turn control the potentiometers connected to the
control board.
Each hotplate is controlled by a separate knob.
POSITIONS OF HOTPLATES
Fig. 27
1 - REAR HOTPLATE Ø180 mm
2 - FRONT HOTPLATE Ø140 mm
3 - "ON" PILOT LAMP
4 - HOTPLATE CONTROL KNOBS
HOTPLATE CONTROL KNOBS
Fig. 28
1 - REAR HOTPLATE Ø180 mm
2 - FRONT HOTPLATE Ø140 mm