Fgr Fornos 2004

The ovens Collection 38 2004

THE OVENS COLLECTION 38 Technical training

CONTENTS

- 3 -CU3P-COLLECTION38-001UK-06/05

1 - INTRODUCTION ......................................................................................................................................................5

2 - INSTALLATION........................................................................................................................................................6 2.1. - Building-in .........................................................................................................................................................6 2.2. - Electrical connection .........................................................................................................................................7 2.3. - Technical features.............................................................................................................................................7

3 - USE...........................................................................................................................................................................8 3.1. - Setting to time ...................................................................................................................................................8 3.2. - Children's safety................................................................................................................................................8 3.3. - Standby mode...................................................................................................................................................8

4 - THE MULTIFUNCTION PYROLYTIC OVEN ...........................................................................................................9 4.1. - Control panel.....................................................................................................................................................9 4.2. - Management of the system...............................................................................................................................9 4.3. - The Various Functions ....................................................................................................................................11 4.4. - Operating principle..........................................................................................................................................12 4.5. - The cold door ..................................................................................................................................................13 4.6. - The various cooking modes............................................................................................................................14 4.7. - The pyrolysis...................................................................................................................................................16 4.8. - Consumption...................................................................................................................................................18 4.9. - Study of the locking.........................................................................................................................................19 4.10. - Operation of the locking ..................................................................................................................................19 4.11. - Manual unlocking ............................................................................................................................................20 4.12. - The various components.................................................................................................................................21 4.13. - Skeleton diagram............................................................................................................................................24 4.14. - Block diagram .................................................................................................................................................25 4.15. - The power board.............................................................................................................................................26 4.16. - The program of aid to diagnostic ....................................................................................................................27 4.17. - The DEMO mode ............................................................................................................................................29

5 - THE STEAM OVEN................................................................................................................................................30 5.1. - Control panel...................................................................................................................................................30 5.2. - Management of the system.............................................................................................................................30 5.3. - The Various Functions ....................................................................................................................................31 5.4. - Operating principle..........................................................................................................................................32 5.5. - Study of the cooking .......................................................................................................................................33 5.6. - Air circulation ..................................................................................................................................................34 5.7. - The various components.................................................................................................................................35 5.8. - The block diagram ..........................................................................................................................................37 5.9. - The power board.............................................................................................................................................38 5.10. - The program of aid to diagnostic ....................................................................................................................39 5.11. - The safety devices ..........................................................................................................................................40 5.12. - The DEMO mode ............................................................................................................................................41


CONTENTS

- 4 - CU3P-COLLECTION38-001UK-06/05

6 - THE MICROWAVE AND COMBINED OVENS......................................................................................................42 6.1. - Control panel...................................................................................................................................................42 6.2. - Management of the system.............................................................................................................................43 6.3. - The various functions......................................................................................................................................44 6.4. - Operating principle..........................................................................................................................................45 6.5. - The cooling system.........................................................................................................................................46 6.6. - Management of the magnetrons.....................................................................................................................47 6.7. - The various cooking modes............................................................................................................................48 6.8. - The various components.................................................................................................................................50 6.9. - The block diagrams.........................................................................................................................................53 6.10. - Block diagram of the combined microwave oven ...........................................................................................53 6.11. - Block diagram of the solo microwave oven ....................................................................................................54 6.12. - The power board.............................................................................................................................................55 6.13. - The program of aid to diagnostic for the combi microwave oven ...................................................................56 6.14. - The program of aid to diagnostic for the microwave oven..............................................................................59 6.15. - The DEMO mode ............................................................................................................................................61


INTRODUCTION


1 - INTRODUCTION

The ovens of the COLLECTION 38 are complementary ovens independent of one another.

Each of them fulfils a well precise mission and meets the various culinary needs. This is the reason why they exist in three versions :

With their new aesthetics, they are totally integrated into the design of the trademark.

They are suitable for all the configurations of kitchens through many possibilities of arrangement.

They perform all the desired functions thanks to, in particular, the electronics and all the management and measuring systems for the various parameters.

Multifunction Pyrolytic Oven

It proposes, within a volume of 32 litres, the same cooking performance (cycloheat, automatic temperature recommendation, three pyrolysis cycles) as a 53-litre oven.

It is also fitted with a cool door.

Solo or Combined Microwave Ovens

Both propose a better wave distribution thanks to two magnetrons, each with a power of 850 Watt.

They have shelves to heat or cook two large dishes simultaneously, and several cooking positions.

The Combined Oven combines the rapidity of the cooking in microwave oven with the quality of cooking by forced heat.

Steam oven

It is used for preparing courses without spoiling the flavour of the food, by keeping mineral salts and vitamins.

It proposes a pre-selection of 8 temperatures and 8 cooking times different in order to precisely adapt the cooking to the nature of the food.


INSTALLATION


2 - INSTALLATION

2.1. - Building-in The oven has an optimized air circulation providing remarkable cooking results by complying with the following instructions:

• The oven can be installed in a column piece of furniture. • Cut a 50 mm x 50 mm opening at the rear for the passage of the feeder

(see drawing below). • Centre the oven in the piece of furniture so as to assure a distance of 2 mm to the nearest piece of

furniture. • The material of the piece of furniture must be heat resistant. • The oven must only be placed in the niche if its electrical power supply is cut. • For more stability, secure the oven in the piece of furniture with 2 screws.

MICROWAVE OVEN AND PYROLYTIC OVEN

STEAM OVEN



INSTALLATION

2.2. - Electrical connection

The electrical connection must be performed by an electrician installer, who shall make sure that the oven has been connected in accordance with the assembly instructions and local regulations.

On the oven energization, the electronics is initialized and neutralizes the lighting for a few seconds.

In the case of a connection with wall outlet, the latter must remain accessible after the oven has been installed.

The manufacturer cannot be held responsible for any accident consequential to nonexistent or incorrect earthing.

The oven is delivered together with its 3-conductor feeder. It must be connected to the 220-240 V~ / 50 Hz / single-phase system through a wall outlet with earth connection (standard CEI60083).

This connector must remain easily accessible after installation.

Respect the colour of wires, knowing that wall outlets are commonly connected in accordance with the diagram below. The conductor cross-sections must be at least 1.5 mm² and the installation must be protected by a 16A fuse.

2.3. - Technical features

PYRO OVEN STEAM OVEN

COMBI MICROWAVE

OVEN

SOLO MICROWAVE

OVEN

Operating voltage 220-240V ~ 50 Hz 220-240V ~ 50 Hz 220-240V ~ 50 Hz 220-240V ~ 50 Hz Total power 2925 W 1770 W 3561 W 2060 W

Power consumption

For rise to and hold at 200°C for

1 hour in Traditional mode

0.83 kWh 0.71 kWh 0.78 kWh Output power = 1000 W

Dimensions

Width 43 cm 38.5 cm 42 cm 42 cm

Height 19 cm 18.2 cm 21 cm 21 cm

Depth 38 cm 33.5 cm 37 cm 37 cm

Useful volume 32 litres 23.5 litres 32 litres 32 litres

Earth

Phase (L)Neutral (N)



USE

3 - USE 3.1. - Setting to time

On the energization

• The display flashes. • Set the time with + or –

(Holding the key enables a fast scrolling to be obtained). • Press the Start/Stop key to validate. If there is no validation through Start/Stop key The recording is automatic after a few seconds.

Setting to time again

• Press the "cooking time" and "end of cooking" keys for a few seconds until the display is flashing.

• Adjust with + or –.key • Press the "cooking time" to validate.

3.2. - Children's safety

To lock the controls

• Press the Start/Stop key until you hear a short beep and then a long beep.

• Release the key only at the end of the beep and when the key appears on the display unit . To unlock the controls

• Press the Start/Stop key until you hear a long beep. • Release the key only at the end of the beep and when the key appears on the display unit.

3.3. - Standby mode In order to limit the power consumption of the oven when not used, you can set the display unit to standby mode.

Activation of the standby mode

The oven must be in time display mode.

• Press the + and – keys simultaneously for approximately 5 seconds. • The display unit shows "Lcd OFF". • Release the hold. • 30 seconds later, the display unit goes off.

Setting back to normal mode The oven must be in time display mode.

• Press the + and – keys simultaneously for approximately 5 seconds. • The display unit shows "Lcd on" • Release the hold. • The display remains on continuously

THE MULTIFUNCTION PYROLYTIC OVEN COLLECTION 38 Technical training


PRESENTATION

4 - THE MULTIFUNCTION PYROLYTIC OVEN 4.1. - Control panel It consists of a control keyboard, a display and a function indicator.

4.2. - Management of the system Two printed circuit boards and a switch commutator are necessary:

A display board It includes a display (112 segments), it is in relation with the switch board (Micro travel switches), which is used for selecting the cooking mode, and a control keyboard (modification to the various possibilities of setting times, temperatures, durations). It receives the information from the power board:

• Door contact • Locking contact • Temperatures • Configurations, …

Pyrolysis indicator/Latch

Display unit: time and duration

Temperature indicator

Timer Indicator

Cookingindicator

Cooking

duration key

End-of-cooking key



PRESENTATION

A power board It includes the power control items (Relay, Triac), interfaces with the external components (Sockets, connectors). It controls the power items through the display board, indicate the oven temperature from the information provided by the probe.

It receives the following codes from the display board:

• The various cooking modes • The requested set-points • The functions related to the PAD

A switch commutator

It includes a pushbutton and eight LEDs. Each actuation of the pushbutton defines the position of a cooking mode.

The switch is connected to the display board through a 7-pin sheet.

Cycloheat

Combined cooking

Turbo grill Natural

convection / ECO

Double grill Simple

grill Defrosting

Pyrolysis



OPERATION

4.3. - The Various Functions

4.3.1. - Description of the various functions

FUNCTIONS Elements operating

DESCRIPTION OF THE FUNCTION

Levels recommended

Temperature mini / preselected / maxi



CYCLOHEAT

COMBINED COOKING

TURBO GRILL

NATURAL CONVECTION

1 to 4


DOUBLE GRILL

1 to 4

SIMPLE GRILL


DEFROSTING

The heat source consists of a resistor placed in the oven bottom; the air sucked by a turbine in the centre is re-diffused on the sides. It is not necessary to preheat, except for cooking requiring very short times (cookies on several levels) or to be sealed (roasting beef). The cycloheat is particularly suitable for:

- keeping white meat tender - vegetables and fish - for multiple cooking up to 3 levels.

Three heat sources associated: much heat at the bottom to well bake the pastry, a bit of cycloheat for a medium-moist baking, a touch of grill to brown

- for quiches, pies, juicy-fruit tarts.

This mode alternately combines the turbine effect and the grill effect: the grill radiates the infrared onto the nutriment and the air movement generated by the turbine attenuates its effect - to seal and medium-cook red and white meats - to gently bake the poultry up to 1.7 kg - is not suitable for very big pieces, which would be too close to the grill: browned on the top, not cooked inside.

This mode combines the top and bottom heat sources. It is ideal for slow and delicate cooking.

- for tender game - to cook tasty dishes - to bake breads successfully.

The double grill covers the entire surface of the grid. As for the simple grill, it will show the same efficiency for smaller quantities IMPORTANT REMARK: Leave the door open in power 4.

The defrosting is ensured by the turbine, which stirs the ambient air around the nutriment to be defrosted. The temperature never exceeds 50°C, so assuring ideal defrosting. - To defrost meats and poultry, use the grid with the dripping pan underneath or the pastry tray. Never use the defrost juice, it is not drinkable.



OPERATION

4.4. - Operating principle

4.4.1. - Management of the system

Two printed circuit boards are necessary.

A display board It includes a display, it is in relation with the switch board (travel micro switch), which is used for selecting the cooking mode, and a control keyboard (ON/OFF and various possibilities of setting, times, temperatures, durations).

A power board It includes the control components (relays, triacs), interfaces with the outside (sockets, connectors) and configuration jumpers. It controls the power components through the display board and assesses the temperature in the centre of the oven from the information provided by the probe.

Display board Keyboard board

Locking system

Safety thermostat Catalyzer

Tangential fan

PTC probe

Lamp

Roasting-spitmotor

Motor fan

Grill and vault elements

Sole element Ventilated element

POWER BOARD



OPERATION

4.5. - The cold door

The infrared radiation is stopped by a stack of 4 panes (2 of which are treated)

Fresh-air supply to areas difficult to ventilate

Ventilation by venturi effect

Oven inside

Oven outside

Infrared radiation

Metal deposit on glass (infrared filter)

Mind the direction of assembly

50 Ω

Fresh-air supply

Truncated gasket

Vacuum zone

Fresh-air suction

Tangential fan



OPERATION

4.6. - The various cooking modes

4.6.1. - The traditional / ECO mode The Sole (1200W) and vault (1650W) elements are used. The setting-point temperature is comprised between 40°C and 275°C. (2850W)

4.6.2. - The double-grill mode The grill (1650W) and vault (1000W) elements are energized for 15 seconds (in position 1) to 30 seconds (in position 4). (2650 W)

Position Power Grill 1 1575 W 15 s 2 2070 W 20 s 3 2320 W 25 s 4 2650 W 30 s

4.6.3. - The simple-grill mode The grill element (1650W) is energized for 15 seconds (position 1) to 30 seconds (position 4). (1650 W)

Position Power Grill 1 980 W 15 s 2 1290 W 20 s 3 1440 W 25 s 4 1650 W 30 s

Oven temperature

Control of heating elements



OPERATION

4.6.4. - The rotating-heat mode The ventilated element (1500W) is used. The setting-point temperature is comprised between 40°C and 250°C. The motor fan turns at high speed.

4.6.5. - The combined-heat mode The sole (1200W), vault (1000W), grill (1650W) and ventilated (1500W) elements are supplied over a cycle of 40 seconds (Ton+ Toff = 40 s). The setting-point temperature is comprised between 40°C and 250°C.

Control T on T off Operating time Power Ventilated element 0 s 6.4 s 6.4 s Ventilated element 1500WSole 6.6 s 39.8 s 33.2 s Sole 1200WGrill 18.6 s 26 s 7.4 s Grill 1650WVault 30.4 s 37.8 s 7.4 s Vault 1000W

Pre-heating

Control T on T off Operating time Ventilated element 0 s 6,4 s 6.4 s Sole 6,6 s 39,8 s 33.2 s Grill 8 s 38 s 30 s

0 5 10 15 20 25 30 35 40 seconds

1500W 1200W

2850W

2200W

VENTILATED ELEMENT

SOLE

GRILL

+

SOLE

VAULT

+

SOLE

SOLE



OPERATION

4.6.6. - The Turbo Grill mode The grill (1650w) and vault (1000w) elements are used. The setting-point temperature is comprised between 40°C and 250°C.

4.6.7. - The Defrost mode The ventilated element (1500W) is used. The setting-point temperature is comprised between 30°C and 50°C. The motor fan turns at high speed.

4.7. - The pyrolysis The pyrolytic cleaning is performed by slow combustion of the dirt deposited on the oven walls. So, the dirt changes from liquid or solid state to gaseous state by oxidation. This gas is then purified by absorption through a catalyser from which it goes out in the form of CO2 and HO2 . The optimal efficiency of the pyrolysis is between 460°C and 490°C approximately, for an hour at these temperatures (see curve opposite). Beyond, the enamel might be damaged (515°C max). The oven programming proposes 3 cycles of pyrolytic cleaning.

• An economical cycle that lasts 1h 30'. The oven is locked for approximately 2 hours (cooling time) This cycle consumes almost 25% less than the normal cycle.

• A normal cycle normal that lasts 1h 45'. The oven is locked for 2h 15'. This cycle will always perform efficient cleaning of a dirty oven.

• A super cleaning cycle that lasts 2h. The oven is hen locked for 2h 30'. This cycle will always perform efficient cleaning of a very dirty oven.

Pyrolysis curve

The average cost in electricity (peak rate) of a pyrolysis does not exceed the price of post stamp (0.48€).

Using the deferred start enables you to benefit from the off-peak rate.

Super

Locking threshold

Enamel deterioration area

Duration



OPERATION

4.7.1. - Study of the pyrolysis

Heating elements are supplied over a cycle of 30 seconds (Ton+ Toff = 30 s). For safety reasons, the door is locked automatically after two minutes. The door remains locked for 2 to 2h 30'.

The pyrolysis consists of 6 phases

Phase 1 The grill element is supplied (30/30). The changeover to phase 2 is effective after 24 minutes or if the temperature is 275°C.

Phase 2 The Grill (30/30), vault (10/30 + regulation) and sole (4/30) elements are supplied. The duration of phase 2 is 18 minutes. The temperature is approximately 420°C at the end of phase.

Phase 3 The Grill (30/30), vault (10/30 + regulation) and sole (13/30) elements are supplied. The duration of phase 3 is 20 minutes. The temperature is approximately 475°C at the end of phase.

Phase 4 The Grill (25/30 + regulation), vault (30/30 + regulation) and sole (3/30 + regulation) elements are supplied. The duration of phase 4 is 28 minutes. The temperature is approximately 492°C at the end of phase.

Phase 5 The Grill (25/30 + regulation), vault (30/30 + regulation) and sole (3/30 + regulation) elements are supplied. The temperature set-point is 492°C. The duration of phase 5 is: 0 minute for the Eco cycle, which lasts 1h 30' 15 minutes for the Normal cycle, which lasts 1h 45' 30 minutes for the Super cycle, which lasts 2 hours

Phase 6 All the heating elements are de-energized.

Pyrolysis curve

Duration



OPERATION

4.8. - Consumption

Functions Consumption (in KWh) Time (Min)

Traditional Rise to 200°C 0.385 10.5

Holding at 200°C 0.445 60 Total 0.83 70.5

Rise to 175C 0.325 9 Holding at 175°C 0.380 60

Total 0.71 69

Cycloheat Rise to 200°C 0.265 10.25

Holding at 200°C 0.465 60 Total 0.73 70.3

Rise to 175C 0.205 7.75 Holding at 175°C 0.410 60

Total 0.62 67.8 Consumption (in Wh)

80 Min. Pyro 2450 90 Min. Pyro 2750

120 Min. Pyro 3640

Max power in sequence 2925 W Consumption in standby 4.08 VA



OPERATION

4.9. - Study of the locking During the pyrolysis and in order to prevent self-ignition of greases in case of oven opening, a door locking occurs (4 attempts: 5 min, 10 min, 15 min, probe 285°C). For this purpose, the oven is fitted with a bistable system activated by a wax actuator. Two contacts record ‘door open’ and ‘door locked’ information. Unlocking only occurs when appliance temperature falls below 300°C.

4.9.1. - Description of the unlocking

Advantage of the lock unit: The locking contact status is the exact image of the mechanical locking status

• Door locked = contact closed • Door unlocked = contact open

4.10. - Operation of the locking

The locking • Supply to the thermal activator. • The lock slide moves forward, the contact is actuated. • The supply to thermal activator is cut 15 seconds after contact closing. • The thermal activator cools down and returns to initial position.

The slide is retained by the locking hook The door remains locked.

230V thermal activator

Common ( phase )

Door-open info (230V)

Lock slide

Door contact slide

Locking hook

Door locking finger

Door-locked info (230V)

Locking Unlocking

THERMALACTIVATOR

MECHANICALLOCKING



OPERATION

The unlocking

• Supply to the thermal activator for 90 seconds. • The thermal activator slightly pushes the slide forward. • The locking hook is tilted. • On cooling down, the thermal activator returns to initial position. • The slide is retracted. • The contact opens The door is unlocked.

4.11. - Manual unlocking

In event of blocking, it is possible to manually unlock the lock.

The technique consists in gently inserting into the small hole located behind the strip, a specific tool or a thin rod to act on the locking hook.

To unlock, it is necessary to:

Remove the block of keys.

Remove the decorated strip. if impossible to remove the strip, disassemble the top of the oven.

Press the clips at the rear of the strip (see sketch).

After removing the decorated strip.

Gently insert the tool into the hole (see sketch) to act on the locking hook.

Minimum length: 12 cm Diameter: 3 mm



THE COMPONENTS

4.12. - The various components

Designation Function Characteristics

Grill and vault 2 relays: • REL6 controls the grill element • REL5 controls the vault element

GRILL • 220/240V~ • 1650W • 52 Ω

VAULT • 230V~ • 1000W • 32 Ω

Sole element It is controlled by a relay (REL3) • 220/240V~ • 1200W • 43 Ω

Ventilated element It is controlled by a relay (REL4) • 220/240V~ • 1500W • 35 Ω

Motor fan The motor fan is controlled by a triac (TC2). Only one speed. Opening the door stops it.

• 220/240V~ • 30 W • 80 Ω



THE COMPONENTS


Tangential fan The tangential fan motor is controlled by triac (TC4). It cools the oven, the electronic components, and reduces the door overheating. Two different speeds: • High speed for temperature higher than 300°C. • Low speed for temperature lower than 300°C. The tangential fan is stopped when the temperature in the oven centre is lower than 120°C.

• 220/240V~ • 31 W • 80 Ω

Probe PT500 The probe informs the microprocessor of the oven centre temperature. Connector on board: CN1

P.T.C. • 540 Ω at ambient temperature • 690 Ω at 100°C • 880 Ω at 200°C

Lock

Single-piece assembly including the door locking / unlocking system (wax actuator), the locking contact and door contact. • Locking The door is locked two minutes after the beginning of the cleaning (pyrolysis). The locking contact CV provides the information to the electronics. The door remains locked for 2 to 2h 30'. • Unlocking When the cleaning is complete, and the oven centre temperature is lower than 280°C, triac TC3 supplies the motor again.

• 220/240V~ • 4 W • 2 to 2.5 kΩ

Roasting spit motor

Triac (TC1) controls the roasting spit motor. It operates during these modes: • Medium grill • Double grill • Pulsed grill It stops 30 minutes after the end of cooking and on door opening (programmed cooking).

• 220/240V~ • 4 W • 10 KΩ



THE COMPONENTS


Catalyser

Destruction of smokes and combustion of greases by decomposition into water and carbon dioxide (CO2).

The catalyser starts acting at a temperature of 230° reached thanks to the proximity of the grill resistor. It mainly acts in pyrolysis and is not assembled to non-pyro models.

Safety thermostat

Safety thermostat KX cuts the supply to power elements (grill, vault, sole, ventilated element and ventilated element motor fan) in event of oven overheating.

• Cut at 120°C • Manual reset

Lighting

The lamp is controlled by a relay (REL1) Door opening during cooking causes the lamp to come on.

• Type E14 • 220/240V~ • 15 W • 300°C

Display board The display board includes: • A microprocessor • A display unit, 7 pushbuttons and a buzzer • Connectors. It is linked to a keyboard board used for selecting the various cooking modes.

Connection to power board, 10-point sheet. The display board is supplied with 5 V and 12 V voltages delivered by the hybrid board. Power consumption by the display board lower than 2 Watts.

Power board The hybrid power board includes: • A microprocessor • Power control items (relays, triacs) • Configuration jumpers • Connectors and terminals. It pilots the power items under control of the display board and monitors, through probe PT500, the temperature in the oven centre.

Mind the configuration of the power board. The configuration (position of jumpers SC1, SC2 and SC3 visible on the board) can be checked in the program of aid to diagnostic.

SC1

2 1

SC2 SC3

2 1 2 1



AID TO DIAGNOSTIC

4.13. - Skeleton diagram

POWER BOARD

LAMP

SOLE

VENTILATED ELEMENT

VAULT

GRILL

VENTILATED-ELEMENT MOTOR

TANGENTIAL FAN

ROASTING-SPIT MOTOR

THERMAL ACTIVATOR

MANUAL RESET

THERMOSTAT

TO KEYBOARD KEY

CAVITY PROBE

(PTC)

LOCKING CONTACT

DOOR CONTACT

INTERFERENCE FILTER



AID TO DIAGNOSTIC

4.14. - Block diagram Seven pushbuttons enable the user to validate the cooking modes, adjust the parameters, select the set-points and manage the duration and end of cooking and of pyrolysis, and also the timer. A LCD returns the cooking information to the operator.

Power supply

LCD display and Backlight

Hybrid Interface Board

Operator action capture

(7 pushbuttons)

EEPROM Saving customer

parameters

BUZZER

Switch Board Interface

Data processing unit



AID TO DIAGNOSTIC

4.15. - The power board

Checks must be performed with the oven de-energized.

ON THE OHMMETER Marking Components Ohm

CN1 Cavity PTC probe 540 Ω

CPO-PH Inter (door Open) Infinity

CPO-PH Inter (door Closed) 0 Ω

CVER-PH Unlock Infinity

CVER-PH Lock 0 Ω

MEV-PH Ventilate- element motor 80 Ω

VER-PH Thermal activator 2 kΩ

ON THE OHMMETER Marking Components Ohm

S-PH Sole 43 Ω

ECL-PH Lamp 315 Ω

MR-PH Tangential fan 80 Ω

VR-PH Roasting-Spit Motor 10 kΩ

G2-PH Grill 32 Ω

V-PH Vault 52 Ω

EV-PH Ventilated element 35 Ω

Caution: Three configuration jumpers are installed on the board.(SC1-SC2-SC3)

- SC1 : Multi or natural convection - SC2 : Pyro or non-pyro - SC3 : Oven C38 or conventional oven

The three jumpers are present for the configuration of the pyro muti-cooking oven. (Code CF7)



AID TO DIAGNOSTIC

4.16. - The program of aid to diagnostic

4.16.1. - Important instructions • Connect (if possible) an ammeter to the oven power supply • Entirely execute the program of aid to diagnostic • Record the discrepancies noticed as the program of aid to diagnostic is running • Next, check and replace if necessary the incriminated component(s) • Check the right operation by executing the program of aid to diagnostic again

4.16.2. - Preliminary conditions Set the clock to 12:00 flashing.

• Press keys 5 and 6 simultaneously for a few seconds, and then set the time with keys 2 and 3. • Check that the time colon is flashing.

4.16.3. - Progress of the program of aid to diagnostic Caution: You have five seconds to access the program of aid to diagnostic. If the time has elapsed, set the clock back to 12:00 flashing. After step 1, pressing the START/STOP key or no action for two minutes leads to exit the program of aid to diagnostic. De-energizing the oven also leads to exit the program of aid to diagnostic.

Step Progress and display Remarks

1

Short and successive actuations of keys 1 to 6 and then long actuation of key 7.

‘Beep’ on each actuation and flashing of 12:00 and of the

end-of-cooking indicator .

Entry in PAD successful

• All the display segments are on. NO ⇒ Display board out of order.

Continue the PAD



AID TO DIAGNOSTIC


2

1 short actuation of key 7 ⇒

• All the segments off. NO ⇒ Display board out of order.

• Check of the light box, actuation of the function selector key.

• All the segments come on. NO ⇒ Light box out of order.

Continue the PAD

3


Display of the board reference in the time zone. Display of the soft version in the temperature indicator zone. Record this information.

Continue the PAD

4


• Display of the oven configuration: - CF7 the three jumpers are present on the board. - CF0-CF1-CF5 jumpers missing on the board. • Display of the oven temperature

Continue the PAD

5

1 short actuation of key 7 ⇒ • Display of the temperature read by the cavity NTC. Incorrect value ⇒ Check the probe value: "540 Ω at 20°C.

Continue the PAD

6


• Display of the temperature read by the catalyser NTC.

• 999 + beep = PTC shorted or no probe • 000 + beep = PTC or link cut

Continue the PAD

7


• Sole operation (heat perceptible when door open) and I absorbed = 5.3 A.

NO ⇒ If element + TH safety KX + wiring conformable, then power board out of order.

Continue the PAD

8


• Grill operation (heat perceptible when door open) and I absorbed = 7.2 A.


Continue the PAD

9


• Grill and sole operation (heat perceptible when door open) and I absorbed = 12.4 A. NO ⇒ If elements + TH safety KX + wiring conformable, then power board out of order.

Continue the PAD

10


• Vault operation (heat perceptible when door open) and I absorbed = 4.5 A.


Continue the PAD

11


• Ventilated element operation (heat perceptible when door open) and I absorbed = 10,9 A.

NO ⇒ If elements + TH safety KX + wiring conformable, then power board out of order.

Continue the PAD



AID TO DIAGNOSTIC


12


• Vault and ventilated element operation (heat perceptible when door open) and I absorbed = 10.5 A.

NO ⇒ If elements + TH safety KX + wiring conformable, then power board out of order. Continue the PAD

13


• Tangential fan operation (ventilation + noise perceptible when door closed) and I absorbed = 0.13 A.

NO ⇒ If element + wiring conformable, then power board out of order. Continue the PAD

14


• Lighting operation (visible through the door) and I absorbed = 0.06 A.

NO ⇒ If element + TH safety KX + wiring conformable, then power board out of order. Continue the PAD

15


• Operation of the roasting spit motor and motor fan (rotation visible through the door) and I absorbed = 0.15 A.

NO ⇒ If elements + TH safety KX + wiring conformable, then power board out of order. Continue the PAD

16


Exit from the PAD

Locking: At any moment during the PAD, it is possible to lock the oven by selecting Pyrolysis

4.17. - The DEMO mode

The DEMO mode remains active even after mains cut-off.

It is saved in E2PROM.

To enter the DEMO mode

• Set the time to 12H10 with + or – (See page 9). • Long and simultaneous actuation of Start/Stop and °C keys to validate. • Periodical display of DEMO on the display unit. • You can select the cooking mode you wish, no power elements

will be supplied, except the lamp.

To exit the DEMO mode

• Set the time to 12H10 with + or – (See page 9). • Long and simultaneous actuation of Start/Stop and °C keys to validate. • The DEMO display disappears.

Once the defective element(s) is(are) replaced, repeat the program of aid to diagnostic to validate the repair

THE STEAM OVEN COLLECTION 38 Technical training


PRESENTATION

5 - THE STEAM OVEN

5.1. - Control panel The control panel is "Soft touch" type. It consists of a control keyboard, a display unit and a function indicator.

5.2. - Management of the system Two printed circuit boards are necessary:

A display board

It includes a display, it is in relation with the switch board (travel micro switch), which is used for selecting the cooking mode, and a control keyboard (change in the various possibilities of setting times, temperature, duration).

A power board

It includes the power control items (Relay, Triac) for the interfaces with external components (Sockets, connectors). It controls the power items through the display board, indicates the oven temperature from the information provided by the probe.



OPERATION

5.3. - The Various Functions


5.3.2. - Cooking time

FUNCTIONS Temperatures COOKING EXAMPLES OF COOKING

Steam cooking, the most used

For cooking fragile nutriments

The flesh remains pearly, the collagen

does not appear

For cooking fragile nutriments, fruits,

compotes

Moderate heating

Slow defrost without risk of cooking

Vegetables and meats

Cooking of fragile fishes fillets of sardine, of mullet)

Soft-boiled eggs; good quality of stuffed tomatoes.

Ramekins, creams…

Entire fragile fishes (trout)

Pâtés, chicken livers Reheating of ready-made meals

Melted chocolate, butter. Fruits just warm for immediate

consumption

Defrost of fish fillets before coating them with bread-crumbs.

Red fruits that must remain cold (for tarts and coulis).

Defrost of meats before grilling them (e.g.: sausages)

Cooking Temperature

Preset time

Mini setting time

Maxi setting time

1 hour 1 hour 1 hour 1 hour 1 hour 1 hour 1 hour 1 hour



OPERATION

5.4. - Operating principle The water contained in a removable reservoir is brought by a solenoid valve to a heat source (generator) where it is transformed into steam. The so-obtained steam is held in the stainless steel cavity of the oven by a flap closing as soon as the cooking begins. This flap includes several holes in order to prevent the cavity pressurization. This cooking principle cannot, therefore, be compared to that of a pressure cooker, where the pressure obtained is greater than the atmospheric pressure. In a first time, the oven will be saturated with steam and the temperature will be close to 100°C. In order to prevent the formation of condensation, a heating sheet that covers the top of the oven will be supplied throughout the cooking. A tangential fan provides constant cooling of the oven throughout the cooking, and steam extraction when the flap opens three minutes before the end of the cycle. A safety thermostat with automatic reset (210°C) protects the oven in the event of overheating. Two probes located in the cavity and near the generator provide the temperature control for the various cooking modes.



OPERATION

5.5. - Study of the cooking The cooking is broken down into 5 phases

Water saturation of air and temperature rise (phase 1) From the cooking start, the solenoid valve is supplied between 15 and 30 seconds, depending on the desired temperature. Energization of the tangential fan, generator, heating sheet and thermal activator. The steam generation is important in order to rapidly obtain the saturation in the cavity. The generator temperature is controlled by the probe. Water return (15 to 30 sec.) onto the generator as soon as its temperature exceeds 130°C. The heating sheet is supplied to prevent condensation, and the tangential fan operates to limit the abnormal heating of the oven and electronics. When the set-point temperature is reached in the cavity, the generator is no longer heated.

Steam and temperature hold (phase 2) Regulation of the heating between two values of set-points measured in the cavity, by activating the generator or not. The thermal activator, heating sheet and tangential fan are held energized.

Steam evacuation and temperature fall (phase 3) Three minutes before the end of cooking, the thermal activator and the solenoid valve are no longer supplied. The flap opens, the air flow generated by the tangential fan pushes the steam out of the cavity, so preventing any significant release of steam on door opening. The heating sheet is supplied.

Keeping warm (phase 4) This phase only occurs if the door remains closed after the end of cooking. This phase is used for keeping the food warm. The tangential fan and the heating sheet are still supplied. Keeping warm (one hour maximum) is interrupted by the door opening.

Cavity drying (phase 5) This phase starts from the door opening, at the end of cooking or in phase 3 or 4 and continues even if you close the door. The tangential fan and the heating sheet are supplied, the air flow carries on pushing the steam out of the cavity, and the heating sheet is operating. This phase lasts 3 minutes.



OPERATION

5.6. - Air circulation

During cooking :

• The tangential fan cools the oven electronics. • Air is sucked in at the rear (1) of the oven by the tangential fan. • And then forced to the printed circuit board in order to cool it down (2). At the end of cooking

• The steam is significant in the cavity. • Three minutes before the end of cooking, the flap opens • The air flow generated by the tangential fan enters the wall (3) above the flap. • The steam expelled from the cavity, at the front of the oven, by the air guide located between the

control strip and the handle (4).



THE COMPONENTS



Reservoir

The reservoir must be • Filled with water up to the maxi level before each cooking. • Entirely emptied after each cooking. In the case where the tap water is very limy, it is advisable to use non-limy water in bottle. It is not recommended to use demineralized water.

• Capacity: 1 litre of water

Solenoid valve

The solenoid valve supplies the generator with water. It is controlled by triac TC1 on the power board.

• 220/240V~ • 2L/min • 3.7 kΩ

Switch

The door switch is actuated by the door opening and closing.

Door open = Contact Open Door closed = Contact Closed

Generator Bottom view

The generator is controlled by a relay (REL6). The generator transforms into steam the water that enters it. Two safety thermostats (KX1 and KX2), located under the generator, protect the oven from any overheating (cut-off at 210°C).

• 220/240V~ • 1600 W • 35 Ω

Heating sheet

The heating sheet is controlled by a relay (REL1). Throughout the cooking, the heating sheet is supplied, in order to prevent any risks of condensation. It covers the top of the cavity. The temperature is close to 110°C.

• 220/240V~ • 350 Ω • 160 W • Control thermostat: 120°C

The thermostats

The thermostats protect the oven from any overheating. They are located under the generator.

• 220/240V~ • NF with automatic reset • Cut-off at 210°C



THE COMPONENTS


Thermal activator Triac (TC3) controls the thermal activator. It holds the flap closed during the cooking. It opens the flap during phase 3 (steam evacuation, see page 10).

• 220/240V~ • 5 W • 1 KΩ Supplied: rod extended, flap closed.

Tangential fan

Relay (REL1) controls the tangential fan. The tangential fan provides constant cooling of the oven throughout the cooking, and steam extraction on flap opening three minutes before the end of the cycle.

• 220/240V~ • 10 W • 500 Ω

Power board

The power board includes: • A microprocessor • Power control items (relays, triacs) • Connectors and terminals. It pilots the power items through the display board and monitors thanks to the temperature probes.

• 220/240V~ • 50 Hz

Display board The display board includes: • A microprocessor. • A display unit, 7 pushbuttons and a buzzer. • Connectors. It is linked to a keyboard board that is used for selecting the various cooking modes.

Cavity and generator probes

The probes inform the electronics Probe CN1 checks the generator temperature. Probe CN2 checks the cavity temperature.

• N.T.C. - CN1 : 55 KΩ at 20°C - CN2 : 55 KΩ at 20°C



AID TO DIAGNOSTIC

5.8. - The block diagram



AID TO DIAGNOSTIC


Checks must be performed de-energized, connectors disconnected.

* Make the measurement at the component terminals.

Caution: The lamp socket is connected to CATA item on the board. The sheet socket is connected to ECL item on the board.

ON THE OHMMETER

Marking Component Ohm

CN2 Cavity probe 55 kΩ

CN1 Generator probe 55 kΩ

C-D Inter (door Open) 0 Ω

C-D Inter (door Closed) Infinity

* Tangential fan 500 Ω

VER-PH Thermal activator 1 kΩ

G2-C Generator 35 Ω

VR-PH Solenoid valve 3.77 kΩ

* Heating sheet 372 Ω

THE MICROWAVE AND COMBINED OVENS COLLECTION 38 Technical training


PRESENTATION

5.10. - The program of aid to diagnostic

5.10.1. - Important instructions • Fill the reservoir with water • Connect (if possible) an ammeter to the oven power supply • Entirely execute the program of aid to diagnostic • Record the discrepancies noticed while the program of aid to diagnostic was running • Next, check and replace if necessary the incriminated components • Perform right-operation check by executing the program of aid to diagnostic again

5.10.2. - Entry conditions Set the clock to 12:00 flashing

• Press keys 5 and 6 simultaneously for a few seconds and then regulate the time with keys 2 and 3.

• Check that the time 12:00 is flashing.

5.10.3. - Progress of the program of aid to diagnostic Caution: You have one minute to access the program of aid to diagnostic. If the minute has elapsed, set the clock back to 12:00. After step 1, actuating the START/STOP or no action for three minutes leads to exit the program of aid to diagnostic. De-energizing the oven also leads to exit the program of aid to diagnostic.


1

Short and successive actuations of keys 1 to 6 and then long actuation of key 7.

‘Beep’ on each actuation and flashing 00:00 of the sandglass .

Entry in the PAD successful Display of the board reference in the time zone. Display of the soft version in the temperature indicator zone.

Record this information. Solenoid valve for 30s • Open the door, check for presence of water on the

generator. IF NO ⇒ Check the solenoid valve and wiring.

If OK, then Board out of order Continue the PAD

2


• All the display segments are on. NO ⇒ Display board out of order.

• Check of the light box, actuation of the function selector key.

• All the segments come on. NO ⇒ Light box out of order.

Continue the PAD



AID TO DIAGNOSTIC


3


• Display of the temperature read by the generator NTC.

Value incorrect ⇒ Check the probe value: 50KΩ at 20°C.

Continue the PAD

4


• Display of the temperature read by the cavity NTC. Value incorrect ⇒ Check the probe value: "47KΩ at 20°C.

Continue the PAD

5


• Supply to all the power items. Maximum power: 1760 W I = 7.6 A If I = 0 A ⇒ then Power board out of order

Continue the PAD

6


• Power supply to the generator only. Power = 1600 W I = 7 A I = 0 ⇒ Check the generator safety thermostats, wiring, and resistance, else, replace the board.

Continue the PAD

7


• If the solenoid valve is still supplied, display: VALV On (wait VANN OFF display)

Open the door: check for presence of water in the cavity. If no ⇒ SV Out Of Order Open the door: Check the lighting. If no ⇒Check the lamp, the switch, the wiring. CAUTION: Valv oFF and the door opening condition the switchover to the next step.

Continue the PAD

8


• Operation of the heating sheet and of the tangential fan. I = 0.7 A

• Air flow between the strip and the handle. If no ⇒ tangential fan or wiring out of order

• Open the door, the upper cavity wall must be warm. NO ⇒ Check the power supply circuit of the sheet and its ohmic value: 372 Ω.

Continue the PAD

9


• Power supply to the thermal activator: the flap closes slowly (Visible between the strip and the handle) Visible also inside the cavity.

NO ⇒ Check the power supply to the thermal activator and the wiring.

10


End of the program of aid to diagnostic Caution: At the end of the PAD, clean the water on the generator.

5.11. - The safety devices Probes cut or shorted before a cooking:

No cooking, display of the cooking symbol but no power.

Probes cut or shorted during cooking:

Return to the time and switchover to cavity drying phase (See page 9, phase 5).

Note: In the program of aid to diagnostic, temperature indication = 0°C.



PRESENTATION

Water safety device: Secures the oven when the water does not arrive on the generator.

• No reservoir • No water • Absence of water during cooking • Malfunction of the solenoid valve (It remains in closed position) • Rupture of the water pipe

Operating principle: The generator probe detects abnormally high temperature (180°C). Power supply to the generator and solenoid valve cut + alarm display.

"Reservoir empty flashing + alarm beep"

• Open the oven door and refill the reservoir with water, and then close the door again. • Cooking restarts immediately, the beep stops. • Power supply to solenoid valve for 30 seconds if cooking at 100°C or 15 seconds if defrosting. • Generator temperature measurement 30 seconds after door closing. • It must be < 180°C, else the oven is secured again. • The generator is energized again when the oven temperature is ≤ 150°C.

During the oven securing, the cooking time remains fixed. The "alarm beep" stops, long actuation of the STOP key.


The DEMO mode remains active even after a mains cut-off.


• Set the time to 12H10 with + or – (See page 6). • Long and simultaneous actuation of the Start/Stop and °C keys to validate. • Periodical display of DEMO on the display unit. • You can select the cooking mode you wish, no

power items will be supplied, except the lamp.


• Set the time to 12H10 with + or – (See page 6). • Long and simultaneous actuation of the Start/Stop and °C keys to validate. • The DEMO display disappears.

INFO: Water consumption after a trial of an hour at 100°C : 450 to 650 grams



PRESENTATION

6 - THE MICROWAVE AND COMBINED OVENS

6.1. - Control panel

Combined oven It consists of a control keyboard, a display and a function indicator.

Microwave oven It consists of a control keyboard, a display and a function indicator.



PRESENTATION

6.2. - Management of the system Two printed circuit boards and a switch commutator are necessary :

A display board It includes a display unit in relation with the switch board (Micro travel switches), which is used for selecting the cooking mode, and a control keyboard (modification to the various possibilities of setting times, temperatures, durations). It receives the information from the power board:

• Door contact • Temperatures • Configurations, …

A power board It includes the power control items (Relay, Triac) for the interfaces with external components (Sockets, connectors). It controls the power items through the display board, indicates the oven temperature from the information provided by the probe.

It receives the following codes from the display board:

• The various cooking modes • The set-points requested • The functions related to the PAD

A switch commutator

It includes a pushbutton and LEDs. On each actuation of the button, the position of a cooking mode is defined.

The commutator is linked to the display board through a 7-pin sheet.

Combined

Power indicator

Clock and time display

Cooking indicator

Temperature indicator

Timer symbol

MicrowavePower

indicator

Cooking indicator

Cooking duration indicator

Clock andtime display



USE

6.3. - The var+ious functions


FUNCTIONS Elements operating DESCRIPTION OF THE FUNCTION Levels

recommended

Power mini / preselected / maxi


Power

Temperature mini /preselected / maxi

Temperature

1 to 4

1 to 4

1 to 4

Microwaves

Auto defrost

Microwave combined

Cycloheat

Turbo grill

Grill

Combined grill

Keeping warm

The energy source is provided by the microwaves. The distribution is performed by a combination of

- 1 generator at the top - 1 generator at the bottom

This function is used for a good organization of the defrost.

This mode combines the cycloheat and the microwaves. The cycloheat cooks the nutriment through the movement of hot air and the microwaves speed up the soft cooking.

This mode combines the grill and the microwaves. The grill browns the nutriment and the microwaves speed up the soft cooking.

The heat source consists of a resistor placed in the oven bottom; the air sucked by a turbine in the centre is re-diffused on the sides. It is not necessary to preheat, except for cooking requiring very short times (cookies) or to be sealed (roasting beef). The cycloheat is particularly suitable for:

- keeping white meat tender - vegetables and fish.

This mode alternately combines the turbine effect and the grill effect: the grill radiates the infrared onto the nutriment and the air movement generated by the turbine attenuates its effect. This function allows to grill or roast without roasting spit.

This function is used for grilling: Toasts, chops, thick grills, sausages.

Keeping warm is ensured by the turbine, which stirs the heated air around the nutriment. The temperature never exceeds 50°C, to prevent drying.

Cooking

Reheating



OPERATION

6.4. - Operating principle

6.4.1. - Management of the system Two printed circuit boards are necessary

A display board It includes a display, it is in relation with the switch board (travel micro switch), which is used for selecting the cooking mode, and a control keyboard (Start/Stop and various possibilities of setting, times, temperatures, durations).

A power board It includes the control components (relays, triacs), interfaces with the outside (sockets, connectors) and configuration jumpers. It controls the power components through the display board and assesses the temperature in the centre of the oven from the information provided by the probe.

Power board

Display board Keyboard board

Tangential fanMagnetron 2 Stirrer and

motor

Safety thermostat Magnetron 1

Tangential fan

Transformer, Condenser and Diode

Fixed antenna

Door switch

LES FOURS MICRO-ONDES AND COMBINE COLLECTION 38 Formation technique


FONCTIONNEMENT

6.5. - The cooling system

A shutter, located over the cavity behind the strip, and operated by a thermal activator, is used for directing the air flow from the tangential fans to the oven inside or directly to the outside via the control panel.

The microwave mode and the grill mode

The other modes

Photo 1 : The thermal activator is energized The shutter rises: Flow 1 from the larger tangential fan is directed to the oven inside to sweep the door pane. Flow 2 is directed to the outside.

The thermal activator is activated during microwave functions alone and grill alone. The door remains transparent (no condensation).

Photo 2 : The thermal activator is not energized. The shutter remains horizontal : Flows 1 and 2 from the larger tangential fan are directed to the oven outside, cool the right magnetron and suck the vapours. Flow 3 from the smaller tangential fan cools the left magnétron.

1

2

3

Photo 2

The thermal activator is not involved during combined and traditional functions (except for grill alone).

1

2 3

Photo 1

1

2

3

Photo 2


OPERATION


6.6. - Management of the magnetrons

Each magnetron is controlled by parallel-mounted relay and triac. The triac is used for controlling the magnetron cut-off at zero voltage. It is also used for supplying the magnetron at a preset instant, unlike the relay, where the switching time is not precise.

Magnetron supply principle

Primary : 220/240V~ 50Hz 5A (2.2W)

HV secondary : 2110V~ (160W)

LV secondary : 3.32V~ (0.2W)

T

On

On

Off

Off

Triac

Relay

100ms 100ms 100ms 100ms

220/240V~

High-Voltage transformer

Triac

Neutral

Relay

Magnetron control Cd



OPERATION

6.7. - The various cooking modes

6.7.1. - The microwave mode The two magnetrons are piloted. The power set-point is comprised between 100W and 1000W. As a general rule, durations D1 and D2 are equal, in order to emit the same power on both magnetrons.

For a 500W set-point T1 on = 0.2 s T1 off = 17.5 s T2 on = 5 s T2 off = 22.3 s

80W = 3/30 150W = 6/30 250W = 9/30

Mean operating time of a magnetron over a cycle of 30

seconds

500 W = 17/30 600W = 19/30 750W = 24/30

The power set-point (1000W at a maximum) and the operating time (59 min - 59 s maximum) are transmitted by the display board. The 50W minimum power corresponds to a step of 1.5 seconds.

The stirrer, both tangential fans and the thermal activator operate throughout the cycle.

6.7.2. - The grill mode

The control of the element is computed on a basis of 30 seconds. The operating time of the grill element depends on the temperature set-point transmitted by the display board.

Both tangential fans and the thermal activator operate throughout the cycle.

6.7.3. - The turbo grill mode

The control of the element is computed on a basis of 30 seconds. The operating time of the grill element depends on the temperature set-point transmitted by the display board.

On

Off

T1 on T1 off

D1

T2 onT2 off

0.5 s

Duration of a cycle = 30 seconds

D2

Set-point Temperature Time

1 100 °C 9 s 2 133 °C 13 s 3 170 °C 17 s 4 200 °C 21 s

Set-point Temperature Time

1 100 °C 10 s 2 133 °C 14 s 3 168 °C 18 s 4 200 °C 22 s


OPERATION


6.7.4. - The defrosting mode The defrosting time selected by the consumer is transmitted by the display board to the power board.

The stirrer, both tangential fans and the thermal activator operate throughout the cycle.

6.7.5. - The cycloheat mode

The ventilated element (1500W) and the motor fan are appealed to. The set-point temperature is comprised between 40°C and 250°C (in 5°C steps).

Both tangential fans operate throughout the cycle.

6.7.6. - The keeping warm mode

This mode is strictly identical with the cycloheat mode with a 35°C set-point.

6.7.7. - The grill and microwave mode

The grill mode is actuated simultaneously with the microwave mode. The operating time (59 min - 59 s maximum) is transmitted by the display mode.

The stirrer and both tangential fans operate throughout the cycle. The thermal activator is out of circuit.

1000W

900W

800W

700W

600W

500W

400W

300W

200W

100W

0W

Step

T

1 Step =Defrosting time

8

Defrosting time



THE COMPONENTS



HV transformer 2 relays : • Relay (REL6) controls the right-hand transformer (TR2) • Relay (REL3) controls the left-hand transformer (TR1) A 230V~ is delivered to the primary winding of the high-voltage transformer. Two voltages are generated: • 3.1V~ in LV, which are applied to the magnetron terminals ensure the filament heating. • 2110V~ in HV, which are applied to the voltage doubler and the magnetron. An end of this winding and the magnetron anode are connected to the oven earth.

3 windings Primary: • 220/240V~ • 5A • 2.2Ω • thermal protection High-voltage secondary: • 2110V~ • 1.96A • 160Ω Low-voltage secondary : • 3.32V~ • 0.2Ω

Voltage doubler Condenser and diode

The voltage doubler transforms the 2110V~ voltage into pulsed negative voltage of approximately 4000V~. It consists of two elements: • A condenser, which stores the electrical energy during a half-period. • A diode, which, associated with the au condenser, converts the alternating High Voltage into a negative voltage. It is mounted reciprocal of the magnetron anodic current.

WARNING The high-voltage condenser can remain loaded for approximately 30 seconds to 1 minute after the oven was de-energized. After disconnecting the oven power supply • Wait a few minutes • Short the HV condenser connection against the chassis, using insulated pliers.

Magnetron This is an oscillator emitting electromagnetic energy at 2450MHz frequency. A thermal safety device (KX2) with automatic reset, attached to the magnetron, cuts at 120°C the power supply to both transformers in event of magnetron overheating. The power of each magnetron is limited to 500W.

• Power: 850W

PRECAUTIONS TO BE TAKEN BEFORE ANY ACTION Microwave ovens have circuits that can generate very HIGH VOLTAGES and currents. Before any action, it is imperative to disconnect the feeder.

IT IS FORBIDDEN TO MEASURE THE HIGH VOLTAGE. IT IS ALSO FORBIDDEN TO MEASURE THE VOLTAGE NECESSARY FOR THE MAGNETRON FILAMENT.



THE COMPONENTS


Stirrer and motor Triac (TC1) controls the stirrer motor. • 220/240V~ • 2W • 14KΩ

Ventilated element It is controlled by a relay (REL8) It is located at the rear of the oven cavity. It is designed to heat the air moved by the motor fan.

• 220/240V~ • 1500W • 35Ω

Motor fan Triac (TC4) controls the motor fan. It is in charge of circulating the air heated by the circular element inside the cavity. So, the heated air comes into contact with the food currently being cooked.

• 220/240V~ • 34W • 117Ω

Grill element It is controlled by a relay (REL7). • 220/240V~ • 1500W • 36Ω



THE COMPONENTS


Tangential fans 2 triacs : • TC2 controls the smaller tangential fan. • TC3 controls the larger tangential fan. The tangential fans ensure the cooling of the magnetrons, oven and electronic components.

• 220/240V~ • 18 W per tangential fan • 220Ω

Thermal activator Only for the combi microwave oven

Triac (TC5) controls the thermal activator. When the thermal activator is energized, the shutter is raised. The air flow generated by the larger tangential fan is directed to the oven inside to sweep the door pane. The door remains transparent.

• 220/240V~ • 5W • 1KΩ

Display and power boards The hybrid power board includes: • A microprocessor • Power control items (relays, triacs) • Configuration jumpers • Connectors and terminals. It pilots the power items under control of the display board and monitors, through probe PT500, the temperature in the oven centre. The display board includes: • A microprocessor • A display unit, 7 pushbuttons and a buzzer • Connectors. It is linked to a keyboard board that is used for selecting the various cooking modes.

Mind the configuration of the power board. The configuration (position of jumper SC3 visible on the board) can be checked in the programme of aid to diagnostic.

Probe Only for the combi microwave oven

The probe informs the electronics on the oven temperature.

P.T.C - 540Ω at ambient temperature (20°C) - 690Ω at 100°C - 880Ω at 200°C

CF0 : Solo

SC3

3 2 1

CF1 : Combi



DIAGRAMS

6.9. - The block diagrams

6.10. - Block diagram of the combined microwave oven

ST1 Stirrer motor CS1 Left-hand safety contact MR1 Smaller tangential fan CS2 Right-hand safety contact MR2 Larger tangential fan G Grill element MEV Motor fan EV Ventilated element AT Thermal activator KX1 Safety thermostat 110°C

TR1 Left-hand transformer KX2 Magnetron safety thermostat 120°C

TR2 Right-hand transformer

CP1 Door contact

Con

trol a

nd

disp

lay

link



DIAGRAMS

6.11. - Block diagram of the solo microwave oven

ST1 Stirrer motor MR1 Smaller tangential fan MR2 Larger tangential fan CS1 Left-hand safety contact CS2 Right-hand safety contact TR1 Left-hand transformer TR2 Right-hand transformer

KX2 Magnetron safety thermostat 120°C

CP1 Door contact

Con

trol a

nd

disp

lay

link



DIAGRAMS


Checks must be performed after de-energization, connectors disconnected

ON THE OHMMETER

Items Components Ohm

Ph-1 Stirrer motor 13.7 kΩ

Ph-2 Smaller tangential fan 220 Ω

Ph-3 Larger tangential fan 220 Ω

Ph-4 Motor fan 115 Ω

Ph-5 Thermal activator 1 kΩ

Ph-6 Right-hand transformer 2.5 Ω

Ph-7 Left-hand transformer 2.5 Ω

Ph-8 Grill 36.5 Ω

Ph-9 Lighting 190 Ω

Ph-11 Ventilated element 35 Ω

CN1 Probe 540 Ω at 20°C

Ph-CP Inter1-2 & fuse Door closed.0 Ω

Ph-N Short circuit (door open) 0 Ω



AID TO DIAGNOSTIC

6.13. - The program of aid to diagnostic for the combi microwave oven

6.13.1. - Important instructions • Place a container filled with water in the oven (for testing in microwave mode) • Connect (if possible) an ammeter to the oven power supply • Execute entirely the program of aid to diagnostic • Record the discrepancies noticed as the program of aid to diagnostic is running • Next, check and replace if necessary the incriminated component(s) • Check the right operation by executing the program of aid to diagnostic again

6.13.2. - Preliminary conditions Check that the time colon is flashing

NO: Disconnect the oven and connect it again. On the oven energization, the time display is flashing at 12:00. YES: Set the time to 12:00.

Set the clock to 12:00 By pressing keys 5 and 6 simultaneously for a few seconds and then adjusting the time with keys 2 and 3.

6.13.3. - Progress of the program of aid to diagnostic Caution: You have one minute to access the program of aid to diagnostic. If the minute has elapsed, set the clock back to 12:00. After step 1, an actuation of the START/STOP key or no action for three minutes results in exiting the program of aid to diagnostic.


1

Short and successive actuations of keys 1 to 6 and then long actuation of key 7 until complete lighting-up of the display unit.

• ‘Beep’ on each actuation and all the segments lit. NO ⇒ If link to power board OK then display board out of order.

Continue the PAD

2

1 short actuation of key 7 ⇒ • All the segments off. NO ⇒ Display board out of order.

Continue the PAD

3


• Display of the soft version of display board in the time zone and of the power board in the temperature zone.

Record this information.



AID TO DIAGNOSTIC


4


• Configuration CF1 NO ⇒ If position of jumper SC3 on power board OK, then the power board out of order. • Oven temperature consistent

(Example : oven at ambient temperature of 20°C) NO ⇒ (Example: 0°C) If PTC right (540Ω at 20°C) and PTC / Board link right, then power board out of order.


• Operation of ventilated element, grill, lighting, tangential fans, motor fan, stirrer motor and I absorbed = 13 A.

5 1 short actuation of key 3 ⇒

• Cut of ventilated element, grill, lighting, tangential fans, motor fan, stirrer motor and I absorbed = 0A: Continue the PAD.

NO ⇒ Power board out of order.


• Motor fan operation (noise + ventilation perceptible when door open) and I absorbed = 0.1 A.

NO ⇒ If element + wiring conformable, then power board out of order.


• Cut of motor fan and I absorbed = 0A: Continue the PAD.



• Grill operation (heat perceptible when door open) and I absorbed = 6 A.

NO ⇒ If element + TH safety device KX1 + wiring conformable, then power board out of order. 7


• Cut of grill and I absorbed = 0A: Continue the PAD.



• Operation of tangential fans (noise + ventilation perceptible when door closed) and I absorbed = 0.1 A.



• Cut of tangential fans and I absorbed = 0A: Continue the PAD.



• Operation of ventilated element (heat perceptible in the muffle bottom) and I absorbed = 6 A.

NO ⇒ If elements + TH safety device KX1 + wiring conformable, then power board out of order. 9


• Cut of ventilated element and I absorbed = 0A: Continue the PAD.



• Operation of lighting (light visible through the door) and I absorbed = 0.1 A.



• Cut of lighting and I absorbed = 0A: Continue the PAD.




AID TO DIAGNOSTIC



• Operation of magnetron 1 (noise and operation perceptible when door closed and then water heats) and I absorbed = 4.2 A.

NO ⇒ If element + fuse + door contacts + TH safety device KX2 + transformer TR1 + HV diode + condenser and wiring conformable, then carte puissance out of order. 11


• Cut of magnetron 1 and I absorbed = 0A: Continue the PAD.



• Operation of stirrer motor (operation noise perceptible) and I absorbed = 0.02 A.

NO ⇒ If element + belt + wiring conformable, then power board out of order.


• Cut of stirrer motor and I absorbed = 0A: Continue the PAD.



• Operation of magnetron 2 (noise and operation perceptible when door closed and then the water heats) and I absorbed = 4.2 A.

NO ⇒ If element + fuse + door contacts + TH safety device KX2 + transformer TR2 + HV diode + condenser and wiring conformable, then power board out of order. 13





• Operation of thermal activator (piston downward displacement visible when door open, at the top and left) and I absorbed = 0.06 A.

NO ⇒ If element +wiring conformable, then power board out of order. 14


• Cut of thermal activator and I absorbed = 0A: Continue the PAD.


15

1 short actuation of key 7 ⇒ Exit from the PAD

16 Open the door ⇒

• Operation of lighting (light visible through the door) and I absorbed = 0.1A

NO ⇒ If element + door contact + wiring conformable, then power board out of order.

Once the defective element(s) are replaced, repeat the program of aid to diagnostic to validate the repair



AID TO DIAGNOSTIC

6.14. - The program of aid to diagnostic for the microwave oven

6.14.1. - Important instructions • Place a container filled with water in the oven (for testing in microwave mode) • Connect (if possible) an ammeter to the oven power supply • Execute entirely the program of aid to diagnostic • Record the discrepancies noticed as the program of aid to diagnostic is running • Next, check and replace if necessary the incriminated component(s) • Check the right operation by executing the program of aid to diagnostic again

6.14.2. - Preliminary conditions Check that the time colon is flashing

NO: Disconnect the oven and connect it again. On the oven energization, the time display is flashing at 12:00. YES: Set the time to 12:00.

Set the clock to 12:00

By pressing keys 5 and 6 simultaneously for a few seconds and then adjusting the time with keys 2 and 3.

6.14.3. - Progress of the program of aid to diagnostic Caution: You have one minute to access the program of aid to diagnostic. If the minute has elapsed, set the clock back to 12:00.

After step 1, an actuation of the START/STOP key or no action for three minutes results in exiting the program of aid to diagnostic. Step Progress and display Remarks

1

Short and successive actuations of keys 1 to 6 and then long actuation of key 7 until complete lighting-up of the display unit.

• ‘Beep’ on each actuation and all the segments lit. NO ⇒ If link to power board OK then display board out of order.

Continue the PAD

2

1 short actuation of key 7 ⇒ • All the segments off. NO ⇒ Display board out of order.

Continue the PAD

3


• Display of the soft version of display board in the time zone and of power board in temperature zone.

Record this information.



AID TO DIAGNOSTIC


4


• Configuration CF0 NO ⇒ If position of jumper SC3 on power board OK, then power board out of order.

1 short actuation of key 7 ⇒ • Operation of lighting, tangential fans,

stirrer motor and I absorbed = 0.2 A.


• Cut of lighting element, tangential fans, stirrer motor and I absorbed = 0A: Continue the PAD.



• Operation of tangential fans (noise + ventilation perceptible when door closed) and I absorbed = 0,1 A.

NO ⇒ If elements +wiring conformable, then power board out of order.


• Cut of tangential fans and I absorbed = 0A: Continue the PAD.



• Operation of lighting (light visible through the door) and I absorbed = 0,1 A.

NO ⇒ If element +wiring conformable, then power board out of order.


• Cut of lighting and I absorbed = 0A: Continue the PAD.



• Operation of magnetron 1 (noise and operation perceptible when door closed and then the water heats) and I absorbed = 4.2 A.







NO ⇒ If elements +wiring conformable, then power board out of order. 9 1 short actuation of key 3 ⇒


NO ⇒ If element + belt + wiring conformable, then power board out of order.


• Operation of magnetron 2 (noise and operation perceptible when door closed and then water heats) and I absorbed = 4.2 A.







AID TO DIAGNOSTIC


11

1 short actuation of key 7 ⇒ Exit from the PAD

12 Open the door ⇒

• Operation of lighting (light visible through the door) and I absorbed = 0,1A

NO ⇒ If element + door contact + wiring conformable, then power board out of order.


The DEMO mode remains active even after a mains cut.

It is saved in E2PROM.


• Set the time to 12H10 with + or – (See page 9). • Long and simultaneous actuation of Start/Stop and °C keys to validate. • Periodical display of DEMO on the display unit. • You can choose the cooking mode you wish, no power

element will be supplied, except the lamp.


• Set the time to 12H10 with + or – (See page 9). • Long and simultaneous actuation of Start/Stop and °C keys to validate. • The DEMO display disappears.

Once the defective element(s) are replaced, repeat the program of aid to diagnostic to validate the repair

Brandt Customer Services BP 69526– 95060 CERGY-PONTOISE CEDEX

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Fgr Fornos 2004