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Electrolux Professional S.p.A.

Ovens Platform Customer Support

Technical Training & Service

AOS OVENS - Service Manual

(595889300 – ENG)

Oven Problem

Analysis Probable

anomaly Checks/causes

AOS

In the recipe menu
only signs like "P:
Sxx" o "Sxx" are
appearing

EEPROM of the main
board is not
programmed

Change EEPROM or main
board

Heating element
burnt

Check that all the
branches of the boiler
heating elements are
working

AOS

elt

Heating of the boiler
is slow

Contactors not
working

Check correct working of
the contactors (see
appendix B)

Heating element
burnt

Check that all the
branches of the cavity
heating elements are
working

AOS

elt

Heating of the cavity
is slow

Contactors not
working

Check correct working of
the contactors (see
appendix B)

AOS

gas

The fan of a burner is
working always at the
maximum speed

PWM signal not
present

1) The connector of PWM
signal (X9) on the main
board is not connected
2) PWM signal cable is
interrupted

The fan is not
powered (24 Vdc)

1) Check if the fan is
powered: 24 Vdc from the
relevant switching feeder.
2) Check fuse on the
relevant switching feeder
if 24 Vdc are not present

AOS

gas

The fan of a burner
does not start

PWM signal at 0

1) Exchange the PWM
cable between cavity and
boiler fan to check if the
fan starts
2) Check if high voltage
digital signal is present on
X10/11-5÷8
3) Close the gas tap,
disconnect connector X9
and try to start the burner:
the fan has to run at the
maximum speed. If this is
not happening, change
fan. If the fan starts,
change main board.

File: AOS service manual (ENG).008

©Copyright 2002 by Electrolux Professional

P.25/40

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Содержание AOS061E Series

Страница 1: ...list 004 05 12 2003 AOS service manual ENG 004 A Canova Gas ovens AOS instead of ECS corrected calibration procedures firmware 2 6 reduced the number of parameter so that some of the parameters in the manual are related to old firmware releases 004a 23 01 2004 AOS service manual ENG 004a A Canova Corrected aerator mistake on 20 1 1 gas boiler 005 06 04 2004 AOS service manual ENG 005 A Canova New ...

Страница 2: ...SERVICE UTILITIES 9 9 1 UTILITIES THAT CAN BE ACTIVATED WITH OVEN SWITCHED ON 9 9 2 UTILITIES THAT CAN BE ACTIVATED IN PARAMETER PROGRAMMING 10 10 SELECTION OF THE LANGUAGE FOR THE RECIPE MENU LEV A 11 11 CLEANING CYCLE LEV A OVENS 11 12 CYCLES UTILITIES IMPORTANT PARAMETERS 12 13 GAS SYSTEM 13 13 1 GAS VALVE 14 13 2 OFFSET PRESSURE CALIBRATION 16 13 3 USE OF MANOMETER FOR OFFSET PRESSURE MEASURE ...

Страница 3: ...rvice Manual 595889300 ENG APPENDIX D TROUBLESHOOTING 24 APPENDIX E LAMBDA PROBE 29 APPENDIX F PARAMETER DESCRIPTIONS 30 APPENDIX G GAS CALIBRATIONS 32 APPENDIX H WATER TREATMENT 38 APPENDIX I CONNECTION TO HACCP SYSTEM 40 File AOS service manual ENG 008 Copyright 2002 by Electrolux Professional P 3 40 ...

Страница 4: ...nt while the 4 lines are showed on the display press the external service buttons fig 3 till you hear a beep Fig 4 Fig 5 Fig 6 1 1 1 2 1 At this point press the right buttons till you hear a beep fig 4 Press then the left service buttons till the beep fig 5 At this point release the left buttons keeping pressed the middle one fig 6 till you hear 2 beeps Release the middle button and on the tempera...

Страница 5: ...rature display fig 8 At this point while the 4 lines are showed on the display press the external service buttons fig 9 till you hear a beep At this point press the right buttons till you hear a beep fig 10 Press then the left service buttons till the beep fig 11 Release the button and on the temperature display you will see P 1 while on the little display the name of the parameter will appear fig...

Страница 6: ...s 1 Switch on the oven 2 Enter in parameter programming and set parameter cort to 0 3 Exit from programming and switch on again the oven 4 Wait for the end of the pre heating cycle 5 Select a steam cycle 100 C 6 Select continuous time indication cont on time display 7 Press and hold down the left service buttons and at the same time press the START button fig 14 the oven will give a long beep 8 Re...

Страница 7: ...ure we have to find the point of 0 of humidity The procedure is done in a way similar to the by pass calibration These are the steps 1 Set an hot air cycle 150 C time over 15 minutes open flap 2 Start the cycle pressing together the left and middle service buttons and the START button The oven will give a long beep 3 Wait around 10 15 minutes to dry completely the cavity 4 Close the flap and wait ...

Страница 8: ...ventilation openings on the bottom of the control panel Ept1 cavity probe in open circuit only the steam cycle 100 C can be selected Ept2 boiler probe in open circuit only hot air cycle can be selected Ept3 meat probe in open circuit only time cooking can be selected Ept4 by pass probe in open circuit only hot air regeneration or low temperature steam cycle can be selected Ept8 NTC probe in short ...

Страница 9: ... several probes pressing the service buttons See the following figures 9 Service utilities Fig 17 Bypass temperature Fig 16 Boiler temperature Fig 18 Meat probe temperature Fig 19 PCB temperature From firmware release 2 50 some useful utilities are present for troubleshooting and diagnostic of the oven These additional features can be divided in 2 set utilities that can be activated with the oven ...

Страница 10: ...time the hot air cycle button is pressed the next relay is activated and remains activated till the next pressure of the hot air cycle button o If the hot air cycle button is kept pressed the relays are sequentially activated Pressing the time buttons the time will be displayed Pressing the utility button on the time display a 4 characters message will be displayed while on the little display will...

Страница 11: ...ue for the desired language see the relevant parameter list 11 Cleaning cycle lev A ovens Each cleaning cycle can be divided into the repeating of 3 fundamental phases3 Phase A Washing phase controlled through the parameters CLt1 time of detergent injection and CLt2 time of detergent water injection Phase B like Phase A but with the final sub phase with 20 seconds of water Washing phase controlled...

Страница 12: ...ling phase will take place if the cavity temperature is over 3 C parameter dSAc from the set point of the steam cycle Boiler automatic drain The automatic boiler drain takes place each 2 hours of working of the boiler heating elements burners parameter dbon and if the water temperature is lower than 50 C parameter tcdb Then the boiler is automatically filled Board cooling The cooling fan is activa...

Страница 13: ...r the burner fans With an high voltage input on X10 5 8 the POW board generates on X9 2 5 a PWM signal to control the speed of the burner fans i e controlling the quantity of sucked gas and air The PWM signal changes according to the status of the burner i e Start of the burner controlled with parameters StcA start of cavity burners and Stbo start of boiler burners Full power of the burner control...

Страница 14: ...ere will be again 15 s of interpurge phase and then the last ignition attempts before the reset signal In case of loosening of the flame signal during working only one re ignition attempts takes place In case of conversion to different type of gas besides the injector diaphragm also the parameters which control the PWM signal have to be changed according to appendix G and the offset pressure has t...

Страница 15: ...l Training Service AOS OVENS Service Manual 595889300 ENG Inlet pressure test point Offset pressure test point Injector Remove this threaded cap to get access to the offset adjustment screw File AOS service manual ENG 008 Copyright 2002 by Electrolux Professional P 15 40 ...

Страница 16: ...rew To adjust the cavity gas valve offset set an hot air cycle half power to adjust the boiler gas valve offset select a steam cycle half power Wait around 3 minutes for the stabilization of the pressure before adjusting it turning slowly the screw indicated in the picture above 13 3 Use of manometer for offset pressure measure Offset pressure test point Offset adjustment screw Fig 23 Injector Fig...

Страница 17: ...th negative reading on the display as in the fig 27 28 this means we are measuring 0 16 hPa 16 Pa Fig 26 Manoometer 0S0388 Using the pressure inlet signed with and with positive reading on the display as in the fig 29 30 this means we are measuring 0 16 hPa 16 Pa Fig 27 Fig 28 Fig 29 Fig 30 File AOS service manual ENG 008 Copyright 2002 by Electrolux Professional P 17 40 ...

Страница 18: ...in the fig 33 34 this means we are measuring 0 16 hPa 16 Pa Fig 31 Fig 32 Fig 33 Fig 34 14 Change of the microprocessor board In case of changing of the microprocessor board the following operations calibrations have to be done 1 Default parameter programming 2 Change parameters according parameter list 3 Lambda probe calibration for lev A ovens from firmware 2 6 4 By pass calibration lev B ovens ...

Страница 19: ... Training Service AOS OVENS Service Manual 595889300 ENG APPENDIX A WATER BOILING POINT Height m Water boiling point C 0 100 00 300 98 90 500 98 30 800 97 50 1000 96 80 1500 95 00 2000 93 50 File AOS service manual ENG 008 Copyright 2002 by Electrolux Professional P 19 40 ...

Страница 20: ...00 1 2 100 1 2 HOT AIR COMBI STEAM KS KS KS K1 K1 K1 K2 K2 K2 K3 K3 K3 K4 K4 K4 Contactors used on AOS061E_ AOS101E_ AOS102E_ 100 1 2 100 1 2 100 1 2 HOT AIR COMBI STEAM KS KS KS K1 K1 K1 K2 K2 K2 K3 K3 K3 K4 K4 K4 K5 K5 K5 K6 K6 K6 K7 K7 K7 K8 K8 K8 Contactors used on AOS201E_ AOS202E_ File AOS service manual ENG 008 Copyright 2002 by Electrolux Professional P 20 40 ...

Страница 21: ... Training Service AOS OVENS Service Manual 595889300 ENG APPENDIX C CONNECTIONS ON MAIN BOARD X20 X21 X22 X23 X14 X15 X16 X17 X18 X19 Put a jumper to make a short in the not used connections File AOS service manual ENG 008 Copyright 2002 by Electrolux Professional P 21 40 ...

Страница 22: ...orm Customer Support Technical Training Service AOS OVENS Service Manual 595889300 ENG X1 1 X25 26 1 X28 1 X10 11 1 X12 13 1 X9 1 X8 1 X6 7 1 X4 5 1 X2 3 1 X24 1 File AOS service manual ENG 008 Copyright 2002 by Electrolux Professional P 22 40 ...

Страница 23: ...PWM signal for burner fans High voltage digital input i e thermal protection of the cavity fan motors and command signal of the burner fans form the ignition devices X10 11 Low voltage digital input i e cleaning system water pressure switch cavity limiter boiler limiter door micro switch and micro switch of the cavity flap X12 13 X14 Connection of bypass probe X15 Connection of cavity probe X16 Co...

Страница 24: ...o 0 AOS The user interface board does not switch on 1 Check the correct connection of the power supply cables of the user interface board on the main board 2 Check he connection of the flat cable on the main board AOS The oven does not switch on and the ON OFF led is off Main board not powered 1 Check if voltage is present 24 Vac at the main board input X1 connector 2 Check voltage output 24 Vac o...

Страница 25: ... correct working of the contactors see appendix B AOS gas The fan of a burner is working always at the maximum speed PWM signal not present 1 The connector of PWM signal X9 on the main board is not connected 2 PWM signal cable is interrupted The fan is not powered 24 Vdc 1 Check if the fan is powered 24 Vdc from the relevant switching feeder 2 Check fuse on the relevant switching feeder if 24 Vdc ...

Страница 26: ... gas The boiler burner is whistling or grumbling Gas air mixture not correct 1 Check PWM parameters for the boiler burner 2 Check offset pressure 3 Check injector 4 Check aerator 5 Set to 0 the parameter Sbc in order to have the cooling fan always working supplying with air the burners 6 Check integrity of the gasket of the boiler burner AOS gas The main board is switching off on by itself 1 Check...

Страница 27: ...hrough fuse F2 2 Check fuse on TR_Fx 3 Check that 24 Vdc are present at the output of TR_Fx J1 1 e J1 2 J1 3 e J1 4 and at the input on the fan with connector X9 disconnected and 24 Vdc present at the input on the burner fan this has to run at the maximum speed see also the following point 1 4 Check correct connections between TR_Fx and the burner fan Burner fan is not working burn xxxx error afte...

Страница 28: ...ble Water level probes covered with scale or other Check water level probes Broken probe cable Check continuity of the cable Water level probe are not detecting water Water level system on main board not working Make a short between X25 26 1 and X25 26 3 the fast filling valve has to close make a short between X25 26 2 and X25 26 3 the slow filling valve has to close If this is not happening chang...

Страница 29: ...ductive for the oxygen ions so that if there is a different concentration of oxygen at the two sides of the sensors one side is in contact with the analyzed gas the other side is in contact with the external a voltage is generated Since the Oxygen Nitrogen ratio in the air is constant a measurement of the concentration of oxygen enables the percentage of a third gas in this case water vapor to be ...

Страница 30: ... disable the oven stops when door is open in convection steam and combi mode 0 the oven stops dSod Flag to disable pre heating of the boiler when the oven is in stand by mode 0 enable pre heating 1 disable dSPS Max cooking chamber temperature derivative value for heating elements to be switched OFF FUZZY LOGIC dtoF Max cooking chamber temperature derivative value for heating elements to be switche...

Страница 31: ... of 6 point meat probe OPr5 OFFSET of fifth probe of 6 point meat probe OPr6 OFFSET of sixth probe of 6 point meat probe pdEr Sample period to calculate the derivative value FUZZY LOGIC PI Parameter p of SCELON SCEL 1 p 400 i FUZZY LOGIC PPM Flag to enable Peak Power Management 0 disable 1 enable Sbc Cooling temperature set for board ventilation SbYP Bypass temperature with max cooking cavity stea...

Страница 32: ...SET hPa StcAhAcAFucA G20 6 50 Yellow 0 20 35 30 60 G25 7 80 Yellow 0 20 35 30 60 G30 5 30 Yellow 0 25 40 28 43 LPG 5 30 Yellow 0 13 40 28 43 BOILER BURNER Parameters GAS Injector Aerator OFFSET hPa Stbo hAbo Fubo G20 6 50 Yellow 0 20 55 35 78 G25 7 80 Yellow 0 20 55 35 78 G30 5 30 Yellow 0 28 55 36 66 LPG 5 30 Yellow 0 18 55 36 66 File AOS service manual ENG 008 Copyright 2002 by Electrolux Profes...

Страница 33: ...ations put the ø 21 flow reducer flange between cavity burner fan and cavity burner Change the PWM parameters Then change the injector with the 5 70 one and calibrate the offset in the range 0 15 0 08 hPa so as to eliminate possible whistles noises row LPG1 After you have found the best working condition cool down and verify ignitions with cold burner If the previous setting does not eliminate whi...

Страница 34: ...Blue 0 15 30 37 72 LPG 6 15 Blue 0 30 37 72 LPG conversion for cavity burner for AOS201G For LPG installations put the ø 21 flow reducer flange between cavity burner fan and cavity burner Change the PWM parameters Then change the injector with the 5 70 one and calibrate the offset in the range 0 15 0 08 hPa so as to eliminate possible whistles noises row LPG1 After you have found the best working ...

Страница 35: ...tbo hAbo Fubo G20 7 00 Red 0 43 50 100 G25 8 50 Red 0 43 50 100 G30 5 70 Red 0 15 35 45 78 LPG 5 70 Red 0 35 45 78 LPG conversion for cavity burner for AOS102G For LPG installations put the ø 25 flow reducer flange between cavity burner fan and cavity burner Change the PWM parameters Then change the injector with the 5 70 one and calibrate the offset in the range 0 10 0 02 hPa so as to eliminate p...

Страница 36: ... Red 0 20 45 43 100 G25 8 00 Red 0 20 45 43 100 G30 5 70 Red 0 25 0 20 40 43 95 LPG 5 70 Red 0 15 0 10 40 43 95 UPPER BOILER BURNER Parameters GAS Injector Aerator OFFSET hPa Stbo hAbo Fubo G20 7 50 Red 0 05 0 00 40 50 100 G25 8 50 Red 0 05 0 00 40 50 100 LPG2 G30 5 80 Red 0 07 0 02 40 45 90 LPG1 6 00 Red 0 07 0 02 40 45 90 LOWER BOILER BURNER Parameters GAS Injector Aerator OFFSET hPa Stbo hAbo F...

Страница 37: ...er LPG conversion for boiler burners for AOS202G Change the PWM parameter Then change the injector with the 6 00 one and calibrate the offset in the range 0 07 0 02 hPa upper and lower boiler burner so as to eliminate possible whistles noise row LPG1 After you have found the best working condition cool down and verify ignitions with cold burner If the previous setting does not eliminate whistles o...

Страница 38: ...sional S p A Ovens Platform Customer Support Technical Training Service AOS OVENS Service Manual 595889300 ENG APPENDIX H WATER TREATMENT File AOS service manual ENG 008 Copyright 2002 by Electrolux Professional P 38 40 ...

Страница 39: ...rvice Manual 595889300 ENG Summary table Not required Not required Nanofilter Nanofilter Osmotizer Osmotizer Graph 5 F 5 F 5 F 5 F 5 F Hardness 5 F Treatment Not required Softener Nanofilter Nanofilter Osmotizer Osmotizer File AOS service manual ENG 008 Copyright 2002 by Electrolux Professional P 39 40 ...

Страница 40: ...connection Addr address of the appliance in the HACCP Advanced network tPrn print frequency in case of HACCP Basic value in seconds In case of HACCP Basic i e setting HCCP to 1 to use the printer 881457 or 880048 and print with the printing frequency given through parameter tPrn set on the printer the following parameters PROTOCOL 8 E 1 BAUD RATE 9600 PRINT REVERSE 40 COLUMNS font 9x24 RS485 INTER...

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