ELECTRONICS OVENS - forum- · PDF file1/22/2002 · Merloni Elettrodomestici ELECTRONICS OVENS Service Manual GB 2002-01-22/01 2-30 Language Issue/Edition Page Index

Merloni

Elettrodomestici

GB 2002-01-22/01 1-30

Language Issue/Edition Page

Service Manual

ELECTRONICS OVENS

Merloni

Elettrodomestici

ELECTRONICS OVENS

Service ManualGB 2002-01-22/01 2-30


Index

1 THE NEW RANGE OF ARISTON OVENS

3

1.1 Legend 4

2 ELECTRO-MECHANICAL OVENS

5

2.1 7 Mechanical Cookers 5

3 ELECTRONIC-MECHANICAL OVENS

6

3.1 7 Electronic Cookers - F_ _7 C/P 6

3.2 DAC Programmer Airone 8 7

3.3 DAC Programmer Airone 9 8

3.4 Electronic Scheme FB97 - FO87 - FC87 9

3.5 Mechanical Selector and Recognition Codes 10

3.6 Electronic Scheme FB86P - F097P - FC97P 11

3.7 Mechanical Selector and Recognition Codes 12

3.8 Self-diagnosis 13

3.9 Repairing a Fault 13

4 THE ELECTRONIC OVENS

16

4.1 Smart Cooking - F_ _8 C/P 16

4.2 The Display Card 17

4.3 Il Display 18

4.4 The Power Card 19

4.5 The Cooking Functions 20

4.6 The Fast Clean 23

4.7 Electrical Scheme FO88 - FC 88 24

4.8 Self-diagnosis 25

4.9 Repairing a Fault 26

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Elettrodomestici

ELECTRONICS OVENS



1 THE NEW RANGE OF ARISTON OVENS

Class Tech Style

Smart Cooking

FC 98 P FO 98 P

FC 88 C FO 88 C

7 Cookers

FC 97 PFC 87 C – FC 87

FO 97 P – HO 87FB 97 CFB 86 PFO 97 C

FO 87 C – FO 87

FT 95 C – FT 85 FB 86

FO 85 C

Multi 5

FC 55 CFC 52 C – FC 52

FO 55 C – FO 55FO 52 C – FO 52

HO 50

FB 54 – HB 56

FR 54

FB 51 – FB 51 A

Static

HO 10

FB 26 C – FB 26

FB 21 – FB 21 A – FB 11

HB 22 – HB 20HB 52 – HB 10

HB 50

Gas

FB G – FR G

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Elettrodomestici

ELECTRONICS OVENS



1.1 Legend

PRODUCT LINEB Style line D Diamond lineC Class lineO Tech lineR DecòT Traditional

TYPE OF PROGRAM0 None 1 Timer2 Timer + Final Cooking4 Clock5 Analogical Timer 6 Electronic Timer 7 “DAC”8 Smart Cooking

EXCEPTIONSA Without cooling ventilationB ..

X Y N M Z T (..)

TYPOLOGYF Detached H Built-in kitchenP Multi-purposeD Double ovenM Maxi oven

COOKING FUNCTIONS1 Static 2 Static + spit3 Ventilated4 Ventilated + spit5 Multi 56 Multi 5 + spit 8 Multi 79 Multi 7 + spit G Gas

TYPE OF CLEANING1 NoneR PredisposedC Catalytic P Self-cleaning

COLORIwh Whitebk Black.. Others

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Elettrodomestici

ELECTRONICS OVENS



2 ELECTRO-MECHANICAL OVENS

2.1 7 Mechanical Cookers

1. Choice of the function by means of the mechanical selector;

2. Temperature control by means of the mechanical thermostat;

3. Regulator of external energy (for Grill, where present)

--> EGO Regulators

;

4. Programmer with the following functions:

• Clock;

• Timer;

• Cooking programming

--> Eaton, Diehl, Peapsa Programmers

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Elettrodomestici

ELECTRONICS OVENS



3 ELECTRONIC-MECHANICAL OVENS

3.1 7 Electronic Cookers - F_ _7 C/P

1. Choice of the function by means of the mechanical selector;

D.A.C Programmer

Airone 8 (non-pyrolitic) - Airone 9 (pyrolitic)

2. Temperature control by means of PT500 probe;

3. Programmers with the following functions:

• Watch and Timer;

• Durations and pre-selected temperature for each function;

• State indication;

• Pre-heating or cooking;

• Programming a cooking;

• Start key (security);

• Anti-burning system (spit);

• Software energy regulator for Grill function;

• Self-diagnosis.

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Elettrodomestici

ELECTRONICS OVENS



3.2 DAC Programmer Airone 8

3.2.1 Hardware – Potential Part

1

Relé motors

Bobbin: 24 VdcContact: 10 A/250 Vac

2

Relé thermostatic


3

Stoking capacitors

1 uF - 250 Vac - Class X2

4

Potentiometer connector

5

Probe connector PT500

6

Connector for recognising functions

7

Line and Neutral

(Are not reversible)

4 51 2 3 6

7

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ELECTRONICS OVENS



3.3 DAC Programmer Airone 9

3.3.1 Hardware – Potential Part

1 Relé motorsBobbin: 24 VdcContact: 10 A/250 Vac

2 Relé thermostaticBobbin: 24 VdcContact: 16 A/250 Vac

3 Stoking capacitors1 uF - 250 Vac - Class X2

4 Potentiometer connector5 Probe connector PT5006 Connector for recognising functions7 Relé door-block


8 Line and Neutral(Are not reversible)

1

7

2 3 4 5 6

8

Merloni Elettrodomestici

ELECTRONICS OVENSService Manual

GB 2002-01-22/01 9-30Language Issue/Edition Page

3.4 Electronic Scheme FB97 - FO87 - FC87

1 Functional thermostat2 Relé thermostat N.O.


3 Airone 84 Relé motors N.C.


5 Thermostat at fixed security setting

P5 - P1 - P7 - P3Signals to decode the signalled functions

1

2 3 4

5




3.5 Mechanical Selector and Recognition Codes

Resistance Power TensionCircular 1600 W 230 V

Sole 1200 W 230 VGrill 2250 W 230 VSky 556 W 128 V

P1 P3 P5 P7 Code PowerOff 0 0 0 0 0 0 5

Light 1 0 0 0 0 0 25

Traditional 2 1 0 1 0 A 2200

Bakery 3 1 0 0 1 9 1600

Fast Cooking 4 1 0 1 1 B 2517

Multi-cooking 5 0 0 1 1 3 2383

Pizza 6 0 0 0 1 1 2800

Grill 7 0 1 1 0 6 2250

Au Gratin 8 0 1 1 1 7 2250

1a 2a 3a 4a 5a 6a 7a 8a 9a 10a 11a 12a 13a 14a 15a 16a 17a 18a 19a

Posi

tion

Chargesconnection

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

0 OFF

1 Oven light

2 Sole + grill/sky

3Circular +

internal fan

4Circ. + [sole/(grill + sky)] + internal fan

5Circ. + sole/grill +

internal fan

6Circular + sole +

internal fan

7 Grill

8 Grill + internal fan




3.6 Electronic Scheme FB86P - F097P - FC97P

Airone 9

Circular

Sole

Grill

Sky

680 Ω

Thermo protector forelectronic card

Door-blockRelé

Relémotors

Door-blockSwitch

ReléThermo-static

Pyrolyze entry Pp

Door closedSwitch

Blocked-doorSwitch

Blocked-door entry

Oven light

Bypass fan

Spit

Internal fan550 °C

Security thermostat

Door block Motor

L1N

11

1a

14 14a

13 13a

7 7a

3a 3

1

12

11a

12a

PIN2

L2

M

M

M

4 4a

PIN3

PIN4

PIN1

10a 109

9a

8

8a5 5a

6 6a

2a 2




3.7 Mechanical Selector and Recognition Codes

Resistance Power TensionCircular 1600 W 230 V

Sole 1050 W 230 VGrill 2050 W 230 VSky 556 W 128 V

P1 P2 P3 P4 Pp Code PowerOff 0 0 1 0 0 0 4 5

Light 1 0 1 0 0 0 4 25

Traditional 2 1 1 1 0 0 E 2000

Bakery 3 0 1 0 1 0 5 1600

Fast Cooking 4 0 0 1 1 0 3 2420

Multi-cooking 5 0 1 1 1 0 7 2300

Pizza 6 0 1 1 1 0 7 2650

Grill 7 1 1 0 0 0 C 2050

Au Gratin 8 1 1 0 1 0 D 2050

Fast Clean 9 - - - - 1 2710

1a 2a 3a 4a 5a 6a 7a 8a 9a 10a 11a 12a 13a 14a 15a 16aPo

sitio

n

Chargesconnection

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

0 OFF

1 Oven light

2 Sole + grill/sky

3Circular +

internal fan

4Circular + [sole/(grill + sky)] +

internal fan

5Circular + sole/grill +

internal fan

6Circular + sole +

internal fan

7 Grill

8 Grill + internal fan

9 Grill + sole/sky




3.8 Self-diagnosis

The appliance is fitted with a self-diagnosis system.

In the case of a malfunction, the display will show a message such as

(X and Y are numbers)

In the presence of any fault, the apparatus is unusable.

3.9 Repairing a Fault

FXEY

Note unfortunately not all types of faults can be removed (for example the resistanc-es or non-functioning fans).

FAULT DESCRIPTION WHAT TO DOF1E2 Electronic card damaged.

The fault is discovered after 1 minute from the moment that the oven hasbeen connected to the power supply.

1. Substitute the electronic card.

F3E0 Temperature sensor in short circuit.The fault is discovered after 1 minute from the moment that the oven hasbeen conneced to the power supply.

1. Substitute the temperature probe if itselectric resistance when empty is nextto 0Ω.

2. Substitute the electronic card.After every operation, carry out the “B” procedure to verify the positive outcome.

F3E3 Temperature sensor disconnected or open circuit.The fault is discovered after 1 minute from the moment that the oven hasbeen connected to the power supply.

1. Check that the temperature probe iscorrectly connected to the connector.

2. Substitute the temperature probe if itsown electrical resistance when empty ismore than 2 kW.

3. Substitute the electronic card.After every operation, carry out the “B” procedure to verify the positive outcome.

F4E0 Electronic card damaged. The fault isdiscovered after 1 minute from when it is connected to the power supply.


F5E2 The temperature of the centre oven istoo high (>325°C).

1. Verify that the temperature probe iscorrectly fixed to the posterior part ofthe oven cavity.

2. Check the wiring of the oven and thepower absorbed by each function.

3. With the switch in 0 position, checkthat PT1 e PT2 are in short circuit: sub-stitute the electronic card in positiveoutcome.




Procedure “A”

1. Disconnect the oven and wait 15 - 20 seconds to allow the electronic todischarge completely.

2. Connect in the oven (the time 0.00 should flash) and within 2 - 3 secondsit should enter in the diagnostic state by continually pressing button 4until the display shows all the segments as turned on

3. Press 3 more times button 4.4. The display should show a temperature, between 40 °C and 250 °C, de-

pending on the position of the knob C.5. Turn knob C on the MIN position and verify that within 5 seconds the tem-

perature of 40 °C can be visualised.6. Turn knob C on the MAX position and verify that within 5 seconds the

temperature of 250°C can be visualised.7. If the tests 6 and/or 7 fail, substitute the potentiometer and repeat the pro-

cedure from point 1.8. Should the test still fail, substitute the electronic card re-using the previous

potentiometer repeating the procedure from point 1.9. Should the test fail for a third time, connect to the previously substituted

electronic card a new potentiometer.10. Press button 1 to exit the diagnostic state.

Procedure “B”


2. Connect in the oven (the time 0.00 should flash) and within 2 - 3 secondsit should enter in the diagnostic state by continually pressing the button 4until the display shows all the segments as turned on

3. Press 4 more times button 4.4. The fault is eliminated if the display shows the temperature in which the

oven’s cavity is.5. Press button 1 to exit the diagnostic state.

F8E0 Problem concerning the potentiome-ter of regulating the temperature.The fault is discovered after 1 minute from the moment that the oven hasbeen connected to the power supply.

1. Check the electrical continuity of the 3cables that connect the potentiometerto the electronic card and verify thecorrect connection between connector13 and connector 12.

2. Carry out procedure “A”.

FFFF Unknown fault. Fault is verified immediately the moment the oven is con-nected to the power supply.


00° The display shows 00 rotating theswitch on one or two of the 7 functions.

1. Carry out procedure “C”.

FAULT DESCRIPTION WHAT TO DO




Procedure “C”


2. Connect in the oven (the time 0.00 should flash) and within 2 - 3 secondsit should enter in the diagnostic state by continually pressing button 4until the display shows all the segments as turned on

3. Press button 6. The display will show 0. 00.4. Press buttons 2 and 3 simultaneously and rotate the switch letting it make

one click at a time. Verify that the number on the right of the display coin-cides with each of the functions with the “CODE” on the table inserted inthe paragraph “Electrical Scheme”.

5. If the codes coincide then you can substitute the electrical card.6. If at least one code does not coincide then verify the electrical connec-

tions, paying particular attention to the to the terminal conductors on thecontacts 7 - 12

7. Press button 1 to exit the diagnostic state.




4 THE ELECTRONIC OVENS

4.1 Smart Cooking - F_ _8 C/P

1. Possibility to realise infinite cooking functions;

2. Dynamic control of electrical charges;

3. Temperature control by means of probe PT500;

4. Programmer with the following functions:

• Clock, date, 7 languages, luminous display, timer;

• Duration and pre-selected temperature for each function;

• Visualization of the heat sources,

• Begin/end programming;

• Keyboard block (security);

• Anti-burning system;

• Software energy regulator for Grill function;

• Pre-heating differentiated for immediate and programmed cooking;

• Time indicator for pre-heating;

• Cooking in 4 phases (pre-heating, cooking 1, cooking 2, maintenance);

• Indication in real time of the temperature on the internal cavity;

• Digital compatible;

• Up to 99 added recipes that can be memorised;

• Self-diagnosis.




4.2 The Display Card

1 The acoustic signal (buzzer)2 EEPROM (64 kbit)3 Display VFD Futaba4 Infrared receiver5 Microcontrollor Hitachi H837266 4 Buttons7 Cable to connect the power card8 2 Hand knobs (Encoder)

Note Unique for pytolytic and non pytolytic ovens.

21 4 6 753 8




4.3 Il Display




4.4 The Power Card

The non self-cleaning oven

1 Connector for the connection with the display card2 Serial connector3 Probe connector4 Triacs and opto-triac for the motor cabins5 Sensor NTC6 Relé lamp cabins


7 Relé resistance cabinsBobbin: 24 VdcContact: 16 A/250 Vac

8 TransformerPrimary: 230 V 50/60 HzSec. 1: 23 V - 250 mASec. 2: 1,9-0-1,9 - 300 mA

a Motor outputb Lamp outputc Output resistancesd Configuration resistance

A LineB Neutral

1 2 3 a b A c B

865

4

d 7




4.5 The Cooking Functions

4.5.1 Traditional Functions

4.5.2 Baking Function

Cycling sequence Phases (12 seconds)

1 2 3 4 5 6 7 8 9 10

Pre-heating

Bottom ResistanceGrill Resistance

Circular Resistance

Internal fan Maximum VelocityBypass fan Medium Velocity

Cooking


Circular Resistance

Internal fan OFFBypass fan Maximum Velocity


1 2 3 4 5 6 7 8 9 10

Pre-heating


Circular Resistance


Cooking


Circular Resistance

Internal fan Maximum VelocityBypass fan Maximum Velocity




4.5.3 Fast-cooking Function

4.5.4 Multi-cooking Function

4.5.5 Pizza Function


1 2 3 4 5 6 7 8 9 10

Cooking


Circular Resistance



1 2 3 4 5 6 7 8 9 10

Pre-heating


Circular Resistance


Cooking


Circular Resistance



1 2 3 4 5 6 7 8 9 10

Pre-heating


Circular Resistance


Cooking


Circular Resistance





4.5.6 Grill Function

4.5.7 Au Gratin Function

4.5.8 Pre-heated Postponed Cooking


1 2 3 4 5 6 7 8 9 10

Cooking


Circular Resistance

Internal fan OFFBypass fan Maximum Velocity


1 2 3 4 5 6 7 8 9 10

Pre-heating


Circular Resistance


Cooking


Circular Resistance



1 2 3 4 5 6 7 8 9 10

Pre-heating


Circular Resistance


Bottom Resistance: 1500 W - 230 VGrill Resistance: 2700 W - 230 VCircular Resistance: 1600 W - 230 V




4.6 The Fast Clean


1 2 3 4 5 6 7 8 9 10

Fast CleanBottomGrill

Circular

Cooling FanSpeed Min Med Max

T < 450 °CT > 450 °C

Internal FanSpeed Small Medium Large

Fine > 25 min. Min Med MaxFine < 25 min.

Oven DoorIt blocks immediately after the Start if T > 325 °C

It blocks if T < 200 °C




4.7 Electrical Scheme FO88 - FC 88

1 Anti-disturbing Filter

1




4.8 Self-diagnosis

The appliance is supplied with a system of self-diagnosis that allows “bad”faults (Fault) and “non bad” faults (Warning) to be pointed out.

In the case when a mal-function is pointed out, the display shows a messagetype


In the presence of any Fault, the oven is out of use and any attempt to startcooking is aborted.

In the case of a Warning, the display will show a message type


That a malfunction has been revealed that anyways allows the use of the ovenin the major parts of its functions.

FXY

Note Note unfortunately not all types of faults can be removed (for examplenon-functioning resistances).

WXY




4.9 Repairing a Fault

FAULT DESCRIPTION WHAT TO DOF01* Temperature sensor in short circuit. 1. Substitute the temperature probe if its

electrical resistance when empty is nextat 0Ω.

2. Substitute the electronic card (first thedisplay one then the power one if thefault persists) re-using the previouslysubstituted probe.

After every operation execute procedure “A” to verify the positive outcome.

F02* Temperature sensor disconnected or open circuit.

1. Check that the temperature probe iscorrectly connected to the terminals J9and J10.

2. Substitute the temperature probe if itselectrical resistance when empty ex-ceeds 2 kW.

3. Substitute the electronic card (first thedisplay one then the power one if thefault persists) re-using the previouslysubstituted probe.


F03* Probe of surrounding temperature card of power in short circuit.

1. Substitute the electronic card (first thedisplay one then the power one if thefault persists).

F04* Probe of surrounding temperature card of power in open circuit.


F05* Surrounding temperature too high (>75°C).

1. Verify that the cooling fan is well con-nected.

2. Try any cooking function and verifythat, after a few moments of waiting,the cooling fan comes on at the speed**indicated in the reported tables in theparagraph “Cooking Functions”.

3. Verify that the oven’s probe is well fit-ted in the back and at the terminals J9and J10 present on the power card.


5. Substitute the oven’s probe.




F06* Centre oven temperature too high dur-ing cooking (>325°C).

1. Verify that the temperature probe iscorrectly fitted to the posterior part ofthe oven’s cavity and at the terminals J9and J10 present on the power card.

2. Check that the oven’s cabling conformswith the electrical scheme.

3. Substitute the electronic card (first thedisplay one then the power one if thefault persists)


F07* Centre oven temperature too high dur-ing the Fast Clean (>525°C).

1. See F06.

F08 The door doesn’t block. 1. Verify that the oven’s door is wellcloset.

2. Check that the BP mechanism is con-nected as in the electric scheme.

3. Substitute the BP mechanism.4. Substitute the electronic card (first the

display one then the power one if thefault persists) re-using the previous BP.

F09 The door doesn’t block. 1. Verify that the T within the oven is infe-rior to 200°C after a Fast Clean (followprocedure “A”).

2. After having opened the door by break-ing the blockage fixed on the counterdoor, substitute the BP mechanism.

3. Substitute the electronic card (first thedisplay one then the power one if thefault persists) re-using the previous BP.

F10 Error in the supplied charges. 1. Substitute the electronic card (first thedisplay one then the power one if thefault persists).

FAULT DESCRIPTION WHAT TO DO




All the faults are encountered as soon as a cooking programme is started.

* With the oven OFF, the bypass fan is active at the maximum speed. Withthe oven ON, the display indicated “END – Fnn” and the buzzer emits anacoustic signal: both remain active until the oven is turned OFF.

** For a few seconds the initial speed of the bypass is, in every case, maxi-mum (230 V at the heads of the motor).

Procedure “A”

1. Turn the oven OFF (only the current time must remain on the display).

2. In rapid succession press the keys in the following sequence: 1 - 2 - 1 - 2 -1 - 2 - 4.

3. When the writing “TEST” papers, press the key 3.

4. a) If the probe and the acquisition circuit of the temperature functionscorrectly, on the display the temperature of the oven’s cavity will ap-pear.

b) If the probe in short circuit and/or acquisition circuit of the temperaturedoesn’t function correctly, on the display 0 will appear.

c) If the probe is in open circuit and/or badly connected and/or the acqui-sition circuit of the temperature doesn’t function correctly on the dis-play 583 will appear.

WARNING DESCRIPTION WHAT TO DOW01 Checksum added recipe error.

Warning encountered as soon as a cooking programme is started

1. Substitute the display card.

W02 Communication error EEPROM – uC.Warning encountered whenever the micro controller isn’t able to commu-nicate with the EEPROM.

1. Substitute the display card.

W03 The door doesn’t block.It appears 10 times every 30 sec. after which it has F08

1. See F08.

W04 The door doesn’t block.It appears 10 times every 30 sec. after which it has F09.

1. See F09.





Merloni Elettrodomestici spaviale Aristide Merloni, 47 - 60044 Fabrianotel. 0732/6611 - telex 560196 - fax 0732/662954www.Merloni.com



Documents

ELECTRONICS OVENS - forum- · PDF file1/22/2002 · Merloni Elettrodomestici ELECTRONICS OVENS Service Manual GB 2002-01-22/01 2-30 Language Issue/Edition Page Index