Electrolux Air-O-Speed 593800300 User manual

Electrolux Professional S.p.A.
Ovens Platform Customer Support
Technical Training & Service
AOSpeed OVENS
Service Manual
(593800300 - ENG)
File: AOSpeed service manual (ENG).001 ©Copyright 2002 by Electrolux Professional P.1/20
Air-O-Speed OVEN
- Service Manual -
CONTENTS:
This document contains the information about parameters that can be
read and/or modified by means of user interface, service utilities, ...
PROJECT REF:
AOS ovens
AUTHORS:
F.Ornella
CONTRIBUTION BY:
DOCUMENT HISTORY:
Rel. Date: File: Author: Note:

Electrolux Professional S.p.A.
Ovens Platform Customer Support
Technical Training & Service
AOSpeed OVENS
Service Manual
(593800300 - ENG)
File: AOSpeed service manual (ENG).001 ©Copyright 2002 by Electrolux Professional P.2/20
INDEX
1. PROGRAMMING THE DEFAULT PARAMETERS................................................................................3
2. ADVANCED PROGRAMMING.........................................................................................................4
3. LAMBDA PROBE CALIBRATION ....................................................................................................6
4. OFFSET CALIBRATION OF CAVITY PROBE.....................................................................................7
5. ALARM CODES ...........................................................................................................................7
5.1. ERRORS ..................................................................................................................................7
5.2. WARNINGS...............................................................................................................................8
6. IDENTITY CARD (FIRMWARE VERSION).........................................................................................9
7. OVEN STATUS ............................................................................................................................9
8. SERVICE UTILITIES....................................................................................................................10
8.1. UTILITIES THAT CAN BE ACTIVATED WITH THE OVEN SWITCHED ON...........................................10
8.2. UTILITIES THAT CAN BE ACTIVATED IN PARAMETER PROGRAMMING..........................................11
11. SELECTION OF THE LANGUAGE FOR THE RECIPE MENU (LEV.A) ....................................................11
12. CLEANING CYCLE.........................................................................................................................12
9. CYCLES,UTILITIES,IMPORTANT PARAMETERS...........................................................................12
10. CHANGE OF THE MICROPROCESSOR BOARD..............................................................................13
APPENDIX A–WATER BOILING POINT.......................................................................................14
APPENDIX B–CONTACTORS DIAGRAM ....................................................................................15
APPENDIX C–CONNECTIONS ON MAIN BOARD.......................................................................16
APPENDIX D–LAMBDA PROBE ..................................................................................................19
APPENDIX E–WATER TREATMENT............................................................................................20

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AOSpeed OVENS
Service Manual
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File: AOSpeed service manual (ENG).001 ©Copyright 2002 by Electrolux Professional P.3/20
1. Programming the default parameters
Fig.1
Switch on the oven. (Fig.1)
Just after the switching on, the start-up page will appear.
At this point, press the external service buttons (fig.2) till you hear two beeps.
At this point press the right buttons till you hear other two beeps (fig. 3).
Press then the left service buttons and wait for other two beeps (fig. 4).
At this point release the left buttons keeping pressed the middle one (fig. 5) till you hear 2 beeps.
Release the middle button and wait until the standard page for selecting cycles in “Manual mode” appear
and the cavity lights are on.
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Fig. 2
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Fig. 3 Fig. 4 Fig. 5
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File: AOSpeed service manual (ENG).001 ©Copyright 2002 by Electrolux Professional P.4/20
2. Advanced programming
The procedure to enter in advanced programming is similar to the procedure for programming the defaults
parameters.
Switch on the oven. (fig. 7).
Just after the switching on, the start-up page will appear.
At this point, press the external service buttons (fig.8) till you hear two beeps.
Now press the right buttons till you hear other two beeps (fig. 9).
Press then the left service buttons and wait for other two beeps (fig. 10).
Release the buttons and on the display you will see the following (fig. 11).
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Fig. 8
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Fig. 7
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Fig. 9 Fig. 10
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1 2

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AOSpeed OVENS
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File: AOSpeed service manual (ENG).001 ©Copyright 2002 by Electrolux Professional P.5/20
1. Pressing the button P3 (OK) it is possible to enter in the parameter list.
2. Now you can scroll the parameters by turning the knob (K).
3. To enter and see the value of the parameter press the button P1 (ABC). See fig.12. Now you can
change the value by turning the knob (K).
4. By pressing again the button P1 you store the new value and go again to the displaying of the
number of the parameter.
Repeat steps from n.2 to n.4 to change all the parameters you need.
Switch off the oven to exit from advanced programming.
Fig.11 Fig.12

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3. Lambda probe calibration
The calibration of the lambda probe is necessary for the right working of the oven. With this procedure we
have to find the 0% humidity point.
The lambda calibration is necessary when you:
•Change the lambda probe
•Change the power board (PCB)
•The value stored on the specific parameter (Oldb) is out of range. Correct range : -30 < Oldb < -80
The procedure is done automatically. These are the steps:
1) Enter in advance programming;
2) Choose “ CALIBRATION” with button P2( )and confirm by pressing the button P3 (OK).( Fig.13)
3) By pressing the button P2 (CAL) the calibration starts (Fig.14). The compartment temperature
displayed will increase up to 160 ºC (320 ºF) and the value (in mV) of the lambda probe will change;
4) After 10-15 minutes the mV displayed should be stabilized and the cavity will be completely dry. In
this case you can confirm by pressing again the button P2 (MEM)
5) A message “CALIBRATION DONE” will appear (Fig.15)
6) Push button P4 (ESC) to exit the calibration or switch off the oven to exit from advanced
programming
NOTE: If you press ESC during the calibration, this will stop the procedure without success.
This calibration is very important and has to be done with care. If the dry point (0% of humidity) is
not correctly stored, the reading of the relative humidity could be overestimated or underestimated.
Fig. 13 Fig.14
Fig.15

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4. Offset calibration of cavity probe
In order to adjust the offset of the cavity probe, enter in parameter programming and set parameter cort to
0.
Then run a steam cycle for several minutes and check the cavity temperature, which should stabilize at the
water boiling point (according to the altitude above sea level). If the stabilized cavity temperature is less or
greater than the correct water boiling point1, a corrective value can be stored in parameter OCA1.
After this, set parameter cort to 1and set parameter SEAL (altitude above sea level).
5. Alarm codes
Alarms can be divided into 2 categories: errors (they stop the appliance) and warnings (they do not stop
the appliance)
If one or more errors occurs the service icon becomes red . By pressing the button P4 you enter
in maintenance page. The list of alarms is displayed (Fig.16).
Fig.16
5.1. Errors
Epxx: If the controller detects one or more parameters which have values not permitting the minimum
operational requirements, an error code will appear on the display, i.e. “Epxx” followed by the parameter
number. Enter the programming mode and set the correct value according to the parameter list.
EtUC: Cavity over temperature; cavity temperature exceeded value stored in parameter cot.
EtUB:Boiler over temperature; boiler temperature exceeded value stored in parameter bot.
EFup/Efdw: Activation of the thermal protection of up or down motor. The thermal protection has an
automatic reset but in order to continue with the cooking process, parameter ALFn has to be reset to 0 to
restart the oven.
Etc: Tripping out of cavity limiter
Etb: Tripping out of boiler limiter
Esch: Over temperature on the electronic board; check the cooling fan and the ventilation openings on the
bottom of the control panel.
Ecel: cavity probe in open circuit (only the steam cycle – 100 °C can be selected)
Ebol: boiler probe in open circuit (only hot air cycle can be selected)
Eprb: meat probe in open circuit (only time cooking can be selected)
Ebyp: by-pass probe in open circuit (only hot air, regeneration or low temperature steam cycle can be
selected)
Entc: NTC probe in short or open circuit
ECAD: A/D converters not working
1See Appendix A

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E MW: magnetron alarm. Only the generation o the microwave will be stopped. The oven can cook in the
traditional way. Enter in programming mode and check the value of parameter ALmg. See parameter list to
understand which magnetron/s was/were faulty. Set to 0 the parameter ALmg.
E SL: boiler water level probes always in closed circuit. They continuously detect the presence of water.
Parameter ALFn has to be reset to 0 to restart the oven.
ECLO: clock error. It appears if the clock was never adjusted.
E PWM: Communication error with PWM system
Ecup: Reset of cavity burner (gas oven) (the upper one in the 20 grid ovens)
Ecdw: Reset of lower cavity burner (gas oven) in 20 1/1 and 2/1 ovens
Ebup: Reset of boiler burner (gas oven) (the upper one in 20 2/1 ovens)
Ebdw: Reset of lower boiler burner (gas oven)
Ertc: A component of the PCB is not dialoguing (Real time clock problem)
Eram: problems to read the RAM
Epar: parameter alarm on the EEPROM. Impossibility to read/write parameters
Epix: problem on the program index of the Factory recipes in the EEPROM
Epha: problem on the program phase of the Factory recipes in the EEPROM
Edes: problem on the description of the factory recipes in the EEPROM
Efau: problem on the automatic recipes in the EEPROM
Efrz: problem on the frozen food index in the EEPROM
Ecat: problem on the category index of food in the EEPROM
5.2. Warnings
EH2O: Before the starting of the cleaning system and during its working, there are some check points of
the water pressure. If the water pressure is too low this warning message appear on the display. Check
the water pressure (1.5÷2.5 bar), check the correct working of the water pressure switch, check if there are
obstructions on the cleaning water inlet pipe (its inner diameter must be 20 mm). From firmware release
2.50, EH2O is a warning message and no more an error causing the stopping of the cleaning cycle.
EFLP: Cavity ventilation flap failure; check the motoreducer or the micro switch that detects the close
position of the flap. If the motoreducer does not close the flap within the time set in parameter FLto, EFLP
error appears.
EPrG: Error in reading the phases of a multiphase recipe
The following warnings are showed by an icon on the top right side of the screen:
Safety level probe of the boiler out of water
Preheating phase of the boiler
Boiler to be descaled
Door open

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6. Identity card (Firmware version)
Enter in parameter programming. Every time you press the 3 service buttons together (fig.17), the identity
card of the oven is displayed (fig.18)
Fig.17
Fig.18
7. Oven status
The status of the oven can be displayed every time by pressing the maintenance icon (Button P4)
Then choose “oven status” (fig.18)by pressing the button P2 ( ) and confirm with button P3 (OK).
The following page will be displayed (fig.19):
Fig.18 Fig.19
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AOSpeed OVENS
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File: AOSpeed service manual (ENG).001 ©Copyright 2002 by Electrolux Professional P.10/20
8. Service utilities
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 switched on,
utilities that can be activated with the oven in parameter programming
8.1. Utilities that can be activated with the oven switched on
With the oven switched on and not in a cooking phase, pressing simultaneously the following buttons it is
possible to activate the detergent, rinse pumps and water valve of the cleaning system:
•Automatic mode, manual mode, humidifier (fig. 20): activation of detergent pump
•Automatic mode, manual mode, boiler drain (fig. 21): activation of rinser pump
•Automatic mode, manual mode, cooling down (fig. 22): activation of water valve of the cleaning system
Detergent pump Rinse pump Water valve
(Fig.20) (Fig.21) (Fig.21)
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