Electrolux AOS Ovens Service Manual

AOS OVENS - Service Manual
(595889300 - ENG)
Electrolux Professional S.p.A.
Ovens Platform Customer Support
Technical Training & Service
AOS OVENS
- 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:
A.Canova
CONTRIBUTION BY:
D.Vadori
F. Fingolo
DOCUMENT HISTORY:
Rel.
Date:
File:
Author:
Note:
Valid for firmware 2.30
Valid for any firmware (references only
to parameter names)
New features from firmware 2.50 and
updating of paragraphs, error list
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)
Corrected aerator mistake on 20 1/1
gas boiler.
New features from firmware 2.7, 2/1
gas ovens, added appendix B-C-D
New calibrations for AOS061G and
AOS101G, updated appendix C-D,
added appendix E-F-G
Updated appendix D, calibration of
AOS061G and added appendix H-I
Updated calibrations for AOS101G,
AOS201G, AOS102G, AOS202G;
firmware 2.80
001
11/12/2002
ECS service manual (ENG).001
A. Canova
002
15/01/2003
ECS service manual (ENG).002
A. Canova
003
21/03/2003
ECS service manual (ENG).003
A. Canova
004
05/12/2003
AOS service manual (ENG).004
A. Canova
004a
23/01/2004
AOS service manual (ENG).004a
A. Canova
005
06/04/2004
AOS service manual (ENG).005
A. Canova
006
05/07/2004
AOS service manual (ENG).006
A. Canova
007
18/02/2005
AOS service manual (ENG).007
A. Canova
008
13/06/2005
AOS service manual (ENG).008
A. Canova
File: AOS service manual (ENG).008
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INDEX
1.
PROGRAMMING THE DEFAULT PARAMETERS .................................................................4
2.
ADVANCED PROGRAMMING ................................................................................................5
3.
BY-PASS CALIBRATION (ONLY FOR LEV. B OVENS)........................................................6
4.
LAMBDA PROBE CALIBRATION (ONLY FOR LEV. A OVENS) ..........................................7
5.
OFFSET CALIBRATION (ONLY FOR LEV. A OVENS)..........................................................8
6.
ERROR CODES .......................................................................................................................8
6.1. ERRORS ..................................................................................................................................8
6.2. WARNINGS...............................................................................................................................8
7.
FIRMWARE VERSION.............................................................................................................9
8.
WORKING TEMPERATURES .................................................................................................9
9.
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).....................................................16
14.
CHANGE OF THE MICROPROCESSOR BOARD................................................................18
APPENDIX A – WATER BOILING POINT ......................................................................................19
APPENDIX B – CONTACTORS DIAGRAM ...................................................................................20
APPENDIX C – CONNECTIONS ON MAIN BOARD......................................................................21
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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
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1. Programming the default parameters
Fig. 2
Fig. 1
Fig. 3
Switch on the oven (fig. 1).
Just after the switching on, a lamp test will take place.
After the lamp test 4 lines will appear on the cavity temperature display (fig. 2).
At this point, while the 4 lines are showed on the display, press the external service buttons (fig.3) till you
hear a beep.
‘
‘
‘
1
1
1
Fig. 4
Fig. 5
‘‘
1
Fig. 6
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 temperature display you will see “PdEF”: the oven will switch off and
on automatically.
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2. Advanced programming
Fig. 7
Fig. 8
Fig. 9
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, a lamp test will take place.
After the lamp test 4 lines will appear on the cavity temperature 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.
‘
‘
1
1
Fig. 10
‘
1
Fig. 11
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. 12).
With the external service buttons it is possible to scroll the list of the parameters.
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Pressing the middle button it is possible to see the value of the parameter (fig. 13) and pressing at this
point the external buttons it is possible to modify the value. Press again the middle button returning to the
displaying of the number of the parameter to store the new value.
Switch off the oven to exit from programming.
Fig. 12
Fig. 13
3. By-pass calibration (only for lev. B ovens)
In order to calibrate the by-pass probe on lev. B oven, follow these steps:
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) Release the service buttons and wait for the stabilization of the temperature reading by the by-pass
probe
9) When the temperature has stabilized, press the three service button together in order to memorize the
value (fig. 15); the oven will confirm the storing with a long beep
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10) Allow the oven to work for several minutes in steam mode checking the oven cavity temperature, which
should stabilize at the water boiling point. If this reading is greater or less than the correct water boiling
point 1 , a corrective value can be stored in the parameter OCA1.
11) Set parameter cort to 1.
12) Set the altitude above sea level of the site on parameter SEAL
Fig. 15
Fig. 14
4. Lambda probe calibration (only for lev. A ovens)
The calibration of the lambda probe is necessary (from firmware 2.6) for the right working of the oven in
case of cycle with set point under 100 °C. With this procedure 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 around 20 seconds to stabilize the humidity inside the cavity;
5) To store the value press together the 3 service buttons. The oven will confirm with a long beep.
6) Stop the cycle with the START button.
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.
1
See Appendix A
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5. Offset calibration (only for lev. A ovens)
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. If the stabilized cavity temperature is less or greater than the correct water boiling
point 2 , a corrective value can be stored in parameter OCA1.
After this, set parameter cort to 1and set parameter SEAL (altitude above sea level).
6. Error codes
Errors can be divided into 2 categories: errors (they stop the appliance) and warnings (they do not stop the
appliance)
6.1.
Errors
EE2P: Communication error with the EEPROM
E---: 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. “E---” 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.
EFUN: Activation of the thermal protection of the motor. On the little temperature display it will appear “UP”
or “DOWN” according it is the thermal protection of the upper motor (and the motor of 6-10 grid ovens) or
lower motor on 20-grid oven. The thermal protection has an automatic reset but in order to continue with
the cooking process, parameter ALFn has to be reset to 0.
Etc: Tripping out of cavity limiter
Etb: Tripping out of boiler limiter
ESCH or ETBR: Over temperature on the electronic board; check the cooling fan and the 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 or open circuit
ECAD: A/D converters not working
E PM: Communication error with PWM system
E SL: Water level probe error. If the boiler heating elements or burners are on for a tiem over that one
defined in parameter tbon without a water charging phase, this error message is activated. To reset it,
parameter ALFn has to be reset to 0.
burn CAUP: Reset of cavity burner (gas oven) (the upper one in the 20 grid ovens)
burn CAdo: Reset of lower cavity burner (gas oven) in 20 1/1 and 2/1 ovens
burn boUP: Reset of boiler burner (gas oven) (the upper one in 20 2/1 ovens)
burn bodo: Reset of lower boiler burner (gas oven)
6.2.
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.
ECLO: Clock error, it appears if the clock was never adjusted
EPrG: Error in reading the phases of a multiphase recipe
EIND: Error in reading the index of the recipes
2
See Appendix A
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EDES: Error in reading the description of a recipe
ERAM: Communication error with the RAM
nFIP: Communication error of recipe display
DOOR: Open door (from firmware 2.6 only the led on the control panel switches on)
FILL: Safety level probe of the boiler out of water
PrEH: Preheating phase of the boiler
OPEN: boiler drain activated
COOL: Cavity cooling phase
7. Firmware version
In order to check the version of the firmware, switch on the oven and wait for the lamp test and the end of
the start-up phase (4 lines on the temperature display). When on the temperature display, the actual cavity
temperature appears, pressing the three service buttons together on the display temperature the firmware
version will appear. Pressing again these buttons, the board temperature will be displayed.
8. Working temperatures
While the oven is working, it is possible to see the temperature of the several probes pressing the service
buttons. See the following figures:
Fig. 16
Boiler temperature
Fig. 18
Meat probe temperature
Fig. 17
Bypass temperature
Fig. 19
PCB temperature
9. Service utilities
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 switched on,
utilities that can be activated with the oven in parameter programming
9.1.
Utilities that can be activated with 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, rinser pumps and water valve of the cleaning system:
• Steam cycle, combi cycle, temperature buttons (fig. 20): activation of detergent pump
• Steam cycle, combi cycle, time buttons (fig. 21): activation of rinser pump
• Steam cycle, combi cycle, utility buttons (fig. 22): activation of water valve of the cleaning system
These routines are achievable only on lev. A ovens, i.e. with the parameter dCLn set to 0, closed door and
cavity temperature less than 80 °C.
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Fig. 20
9.2.
•
•
•
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Fig. 21
Fig. 22
Utilities that can be activated in parameter programming
Pressing the steam cycle and hot air cycle buttons, all the output relays are sequentially activated and
on the time display it will be displayed the activated relay with the message do1, do2, ... (dox=RLx on
the EWD)
From firmware release 2.7 this utility is changed as follows:
o The steam cycle button acts as main switch: if it is released, the test stops.
o Each 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 be shown a number with the following meanings
Big display
ntc
Prb1
Prb2
Prb3
Prb4
File: AOS service manual (ENG).008
Meaning of the number on the little display
PCB temperature
First meat probe temperature (lev. A)
Second meat probe temperature (lev. A)
Third meat probe temperature (lev. A)
Fourth meat probe temperature (lev. A)
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Big display
Prb5
Prb6
CEL1
CEL2
boL1
boL2
byP
Prb
HuM
Meaning of the number on the little display
Fifth meat probe temperature (lev. A)
Sixth meat probe temperature (lev. A)
First cavity temperature
Second cavity temperature
First boiler probe
Second boiler probe
Bypass probe
Single-point meat probe (lev. B)
KS contactor is activated for 15 s and the lambda probe is
fed and after a while the cavity humidity will be displayed
If one of the probes is detecting the same temperature of the ntc probe (PCB temperature), the
meanings are the following:
1) Probe in short circuit
2) Probe not connected (for example Prb on a lev. A oven)
3) Probe at the same temperature of the ntc probe
•
•
If the led “open door” is switched on in parameter programming mode, it means that the safety level
probe of the boiler is detecting water
If the led “scale alarm” is switched on in parameter programming mode, it means that the working level
probe of the boiler is detecting water
10. Selection of the language for the recipe menu (lev. A)
Starting from firmware release 2.30 on lev. A ovens it is possible to select a language for the menu of the
recipes. To select the language, set parameter LanG to the correct value 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 phases 3 :
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 through the parameters CLt1 (time of detergent injection) and CLt2 (time of
detergent + water injection)
Phase C
- Rinsing and drying phase controlled through the parameters CLt3 (time of rinse aid injection) and CLt4
(time of water injection)
The cleaning cycles are composed according the following table:
Cycle
SOFT CYCLE
MEDIUM CYCLE
STRONG CYCLE
EXTRA–STRONG CYCLE
Name of the program
CLEAN 1/SOFT
CLEAN 2/MEDIUM
CLEAN 3/STRONG
CLEAN 4/X-STRONG
Composition of the phases
A+C
2A+C
2A+2B+C
2A+4B+C
At the end of a cleaning cycle (at the end of the acoustic signal) the oven enter a stand-by state (from
firmware 2.40), i.e. the boiler heating elements are not fed, the user interface shows only the time and the
ON-OFF button led is the only lit up led. The exit from this stand-by state takes place with an action from the
user: pressing of a button of the user interface or opening the oven door.
3
At the beginning of each phase the cavity is brought at a certain temperature with a COOLING phase without water or with an hot air
cycle
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NB: To check the correct water installation, make sure the rotating wash arm does not turn below 100 rpm
(120 rpm max.)
12. Cycles, utilities, important parameters
Hot air cycle: Only the cavity heating elements/burners are working. The maximum temperature is 300 °C; if
the set point is over 250 °C, the maximum working time that can be set is given by parameter dutM. If on a
lev. A oven a humidity value is set, the lambda probe will control only the cavity flap.
Steam cycle: The maximum set point temperature is 100 °C (130 °C from firmware 2.6). Boiler heating
elements/burners are controlled with the lambda probe (lev. A ovens) or with the by-pass probe (lev. B
ovens) for a set point of 100 °C; for set point lower than 100 °C, the boiler is controlled with the cavity probe.
Combi cycle: Boiler and cavity heating elements/burners are working. Cavity heating elements/burners are
controlled with the cavity probe; boiler heating elements/burners are controlled by the lambda probe (lev. A
ovens) or by the by-pass probe (lev. B ovens). The maximum set point is 250 °C. From firmware 2.6, for a
set point lower than 100 °C, to obtain the required steam the humidifier is used (not the boiler).
Regeneration cycle: In this cycle boiler and cavity heating elements/burners work alternatively during the
first rising (parameter rIGb – it defines the boiler working time – e parameter rIGc – it defines the cavity
working time) till the set point is reached. After the set point is reached, boiler and cavity works in parallel to
maintain temperature and humidity.
DELTA-COOKING cycle: This cooking cycle is used with the meat probe and hot air, steam or combi cycle.
For this cycle it is set a Delta temperature (let’s call it D) and not a cavity set-point. The cavity will be
thermostatically controlled to have in any moment a cavity temperature that is D °C over the meat probe
temperature.
COOL: The cavity-cooling mode takes place with the fan running and water injection from the temperature of
180 °C (parameter trMA) to the temperature of 40 °C (parameter trMn). Passing from a cooking cycle to a
steam cycle, an automatic cooling 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 activated starting from the temperature defined in parameter Sbc.
Boiler preheating: After the filling of the boiler, the water is heated up to 85 °C (parameter SPHb) and
maintained at this temperature if the boiler is not used.
Hour counters: The hour counter parameters are the following:
ƒ hAir: hot air mode hour counter
ƒ hStM: steam mode hour counter
ƒ hcMb: combi mode hour counter
Parameter PPM: Setting this parameter to 1, the Energy Optimiser function is enabled (with Sicotronic
system) in the foreseen electric ovens. The 2 high voltage digital inputs named IND4 (X10-11/5) and IND5
(X10-11/6) and the 2 output relays RL5 and RL24 are used. RL5 is closed each time the oven has to use
the heating elements at half or full power while RL24 is closed when the heating elements have to be used at
full power (independently from Sicotronic system). IND4 and IND5 are the high voltage inputs of the
commands from Sicotronic system: if on IND4 and IND5 are present 230V the oven is working normally; if
only one is at 230V the oven is forced from Sicotronic system to work at half power (with no visualization on
the display); if both IND4 and IND5 are at 0V, the oven is forced to cut all the heating elements
Parameter dEMO: If enabled (set to 1), this parameter makes the oven working in demo function i.e. the
user interface is fully working but the oven does not make any real function (no load is activated).
Parameter tbon: Timeout for E SL error; if it is set to 0 the control is disabled (from firmware 2.80).
Parameter AbSP: Setting this parameter to 1, the selected cooking cycle starts closing the door without
pressing the START/STOP button (from firmware 2.80).
Parameter dSPS: Setting this parameter to 1 the pre-heating of the boiler is disabled when the oven is not in
cooking mode, so the pre-heating will start at the beginning of a combi or steam mode or of a recipe that
provided the use of those modes in one of its steps (from firmware 2.80).
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13. Gas system
The gas system is made with low emission burners. The main components are:
ƒ
SIT gas valve type SIGMA 848
ƒ
DC burner fan that is intaking air through a calibrated mixer where the air–gas mixture is created; then
the fun conveys the mixture to the burner
ƒ
A cavity and a boiler heat exchanger made with a corrugated tube for increasing the efficiency
ƒ
An ignition rod and a detection rod
ƒ
An ignition device.
Starting with a cooking cycle, the POW board of the oven activates the ignition device which activates the
burner fan whose speed is controlled with a PWM signal.
The POW board activates the ignition device. Form pin 8 of the ignition device a high voltage output is
carried to the digital input section of the POW board (X10/5÷8) and to the switching feeder for 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.:
ƒ
Start of the burner: controlled with parameters StcA (start of cavity burners) and Stbo (start of boiler
burners).
ƒ
Full power of the burner: controlled with parameters FucA (full power of cavity burners) and Fubo (full
power of boiler burners)
ƒ
Half power of the burner: controlled with parameters hAcA (half power of cavity burners) and hAbo (half
power of boiler burners)
The quantity of sucked gas is controlled with those parameters (which are determining the speed of the
burner fans), with the injector/diaphragm inserted at the outlet of the gas valve and with the calibration of the
offset value on the gas valve.
The quantity of sucked air is controlled with the above parameters and with the calibrated aerator on the
mixer.
The ignition sequence is then the following:
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•
•
•
•
The POW boards activates the ignition device
After 1.5 s, the ignition device activates the fans that start at the speed determined with parameters Stxx
The spark starts for 4 s and after these 4 s there are 2 s for flame detection
If the flame is detected, the start speed is maintained for around 6 s and after this time the fans are
carried to their working speed (half or full power)
• If the flame is not detected, the fan keep on running for an interpurge phase of 15 s; after this phase
there is a stop of the fan for 1 s and the ignition sequence is repeated. If the flame is still not detected
there 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 to be set.
NB: On 10 1/1 and 20 1/1 ovens, changing from natural gas to LPG or G30 a flow reducer flange (fig. 24 enclosed in the oven) with hole of diameter 21 mm must be put between the cavity burner fan and the cavity
burner; on 10 2/1 and 20 2/1 ovens, changing from natural gas to LPG or G30 a flow reducer flange (fig. 25 enclosed in the oven) with hole of diameter 25 mm must be put between the cavity burner fan and the cavity
burner
13.1.
Gas valve
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Injector
Remove this threaded cap to get
access to the offset adjustment
screw
Offset pressure test point
Inlet pressure test point
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-
+
Offset adjustment screw
Offset pressure test point
21
Fig. 23 - Injector
13.2.
Fig 24 - LPG flange 1/1
25
Fig. 25 - LPG flange 2/1
Offset pressure calibration
For the adjustment of the offset pressure, connect a manometer with a resolution of 1 Pa (100 Pa=1 mbar)
to the offset pressure test point after loosening the sealing screw. 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)
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Fig. 26 - Manoometer 0S0388
Using the pressure inlet signed with “+” and with negative reading on the display as in the fig. 27-28, this
means we are measuring – 0.16 hPa = – 16 Pa:
Fig. 27
Fig. 28
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. 29
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Fig. 30
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Using the pressure inlet signed with “–” and with negative reading on the display as in the fig.31-32, this
means we are measuring + 0.16 hPa = + 16 Pa:
Fig. 31
Fig. 32
Using the pressure inlet signed with “–” and with positive reading on the display as in the fig. 33-34, this
means we are measuring – 0.16 hPa = – 16 Pa:
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) and cavity offset (parameter OCA1) or only cavity offset for lev. A
ovens.
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APPENDIX A – WATER BOILING POINT
Height (m)
0
300
500
800
1000
1500
2000
File: AOS service manual (ENG).008
Water boiling point (°C)
100.00
98.90
98.30
97.50
96.80
95.00
93.50
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APPENDIX B – CONTACTORS DIAGRAM
Contactors used on AOS061E_, AOS101E_, AOS102E_
100%
1/2
HOT AIR
100%
1/2
COMBI
100%
1/2
STEAM
KS
K1
K2
K3
K4
KS
K1
K2
K3
K4
KS
K1
K2
K3
K4
Contactors used on AOS201E_, AOS202E_
100%
1/2
HOT AIR
100%
1/2
COMBI
KS
K1
K2
K3
K4
K5
K6
K7
K8
File: AOS service manual (ENG).008
100%
1/2
STEAM
KS
K1
K2
K3
K4
K5
K6
K7
K8
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KS
K1
K2
K3
K4
K5
K6
K7
K8
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APPENDIX C – CONNECTIONS ON MAIN BOARD
X20
X21
X22
X23
X18
X19
X15
X16
X17
X14
Put a jumper to make a short in the not used connections.
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X1-1
X10/11-1
X25/26-1
X24-1
X28-1
X12/13-1
X9-1
X2/3-1
X4/5-1
X8-1
X6/7-1
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Connector
X1
X2/3
X4/5
X6/7
X8
X9
X10/11
X12/13
X14
X15
X16
X17
X18
X19
X20, X21, X22
X23
X25/26
X28
AOS OVENS - Service Manual
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Description
Main board supply (24 Vac)
Power supply to cavity fan motors, cooling fans, cavity flap motor, switching feeder for the
lambda probe
Power supply to coils of cavity/boiler heating element contactors or cavity/boiler burner
gas valves, steam condensing valve, humidifier valve, cavity lamps
Power supply to boiler water filling valves, boiler drain valve
Power supply to cleaning system
Output of 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
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
Connection of bypass probe
Connection of cavity probe
Connection of boiler probe
Connection of single point meat probe
Connection of second cavity probe
Connection of second boiler probe
Connections of multi point probe
Connection of lambda probe
Connections of water level probes
RS485 connection
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APPENDIX D – TROUBLESHOOTING
Oven
Problem
AOS
Humidity bar always
of red or blue colour
(or switched off)
AOS
In the recipe menu
the
cleaning
programs are not
present
AOS
The user interface
board
does
not
switch on
AOS
The oven does not
switch on and the
ON/OFF led is off
AOS
AOS
The oven does not
switch on and the
ON/OFF led is on
The user interface
board does switch on
but
no
load
is
activated
File: AOS service manual (ENG).008
Analysis
Probable anomaly
Checks/causes
1) Check if the lambda
probe is fed: 9.5 Vdc from
the relevant switching
feeder
2) If 9.5 Vdc are not
present, check if the
switching
feeder
is
supplied with 230 Vac
from the main board
3) Check the fuse on the
switching feeder
4) Check the connection
of the probe on the main
board
5) Check the connections
on the lambda probe
6) Change the lambda
probe
7) If the humidity bar is
switched off, check if
parameter LAMb is set to
1
Parameter dCln set
to 1
Check and set parameter
dCln to 0
Main
board
powered
Switching off and
switching the oven on
again
after
few
minutes, the oven
starts again
The
previous
analysis
had
a
negative result
Overtemperature
the main board
not
of
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
1) Check if voltage is
present (24 Vac) at the
main board input (X1
connector)
2) Check voltage output
(24
Vac)
on
the
transformer
3) Check F1 fuse
1) Check the working of
the cooling fan
2) Check the openings on
the bottom of the control
panel are not clogged
Defective electronic
component on the
main board
Change main board
Fuse F2 burnt
Check fuse
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Oven
AOS
AOS
elt
Problem
In the recipe menu
only signs like "P:
Sxx" o "Sxx" are
appearing
Heating of the boiler
is slow
Analysis
Probable anomaly
Checks/causes
EEPROM of the main
board
is
not
programmed
Change EEPROM or main
board
Heating
burnt
element
Contactors
working
AOS
elt
AOS
gas
Heating of the cavity
is slow
The fan of a burner is
working always at the
maximum speed
Heating
burnt
not
element
Contactors
working
not
PWM
signal
present
not
The fan is not
powered (24 Vdc)
AOS
gas
The fan of a burner
does not start
PWM signal at 0
File: AOS service manual (ENG).008
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Check
that
all
the
branches of the boiler
heating elements are
working
Check correct working of
the
contactors
(see
appendix B)
Check
that
all
the
branches of the cavity
heating elements are
working
Check correct working of
the
contactors
(see
appendix B)
1) The connector of PWM
signal (X9) on the main
board is not connected
2) PWM signal cable is
interrupted
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
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.
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Oven
Problem
AOS
gas
The cavity burner is
whistling
or
grumbling
Gas-air mixture not
correct
AOS
gas
The boiler burner is
whistling
or
grumbling
Gas-air mixture not
correct
AOS
gas
The main board is
switching off/on by
itself
Coupling of
voltage
and
voltage circuits
File: AOS service manual (ENG).008
Analysis
Probable anomaly
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high
low
Checks/causes
1)
Check
PWM
parameters for the cavity
burner
2) Check offset pressure
3) Check injector
4) Check aerator
5) With LPG on 10-20 grid
ovens (1/1 or 2/1), check
the presence of the flange
after the burner fan
6) Set to 0 the parameter
Sbc in order to have the
cooling
fan
always
working supplying with air
the burners
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
1) Check the separation
between high voltage and
low voltage cables
2) Check integrity of
ignition cables: they must
not
be
cracked
discharging towards inner
components of the oven
3) Reinforce the insulation
of the ignition cables with
a silicon pipe
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Oven
Problem
Analysis
Burner
fan
is
working, "burn xxx"
error after the 3
ignition attempts
Burner
fan
is
working, no ignition
attempts
AOS
gas
Probable anomaly
Gas tap is closed
Not correct injector
Not correct aerator
Not correct values in
the PWM parameters
Too low setting for
the offset pressure
Gas valve is not
opening (the offset
pressure
during
ignition is very high around 1.00 hPa)
No continuity on the
bridge
between
terminals 5-6-7 of the
ignition device
Burner
fan
not
powered (24 Vdc)
Burner does not light
Burner fan is not
working, "burn xxxx"
error after the 3
ignition attempts
PWM signal at 0
Burner fan is not
working, "burn xxxx"
error appears with no
ignition attempts after
reset
File: AOS service manual (ENG).008
Lack of 230 Vac
signal on X10/11
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Checks/causes
Open gas tap
Check injector
Check aerator
Check PWM parameters
Check offset calibration
1) Check the ignition
device is well fixed and
connected to the gas
valve
2) Faulty gas valve
Restore continuity
1) Check that the relevant
switching feeder TR_Fx is
powered through 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
1) 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
burner fan.
2) If with X9 disconnected
the fan starts, check
connections on X9 and if
they are correct change
main board
1) Ignition device is not
giving the 230 Vac signal
from terminal 8, change
ignition device
2) Check connection from
ignition device to TR_Fx
and to X10/11
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Oven
AOS
gas
Problem
The burners switch
on only for few
seconds and then
they switch off
Analysis
The problem occurs
on all the burners
(cavity and boiler)
The problem occurs
only on a cavity
burner or on boiler
burner
Probable anomaly
Checks/causes
Inversion of PhaseNeutral
Check cables on main
terminal board
Detection problem
Change
the
ignition
device with one working
device to check if the
problem persists
Check detection rod and
integrity of relevant cable
Water level probes
covered with scale or
other
Check water level probes
Broken probe cable
Water level probe are
not detecting water
AOS
gas
Water level system
on main board not
working
Oven
is
always
loading water, water
in
the
cavity
overflowing from the
boiler
Noise
circuit
File: AOS service manual (ENG).008
on
ground
Bad
ground
connection of some
devices inside the
oven, mainly the
switching
feeder
TR_Fx or TR_HC are
not connected to
ground
©Copyright 2002 by Electrolux Professional
Check continuity of the
cable
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 change
main board but before
check also next point
Check
the
connections
ground
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APPENDIX E – LAMBDA PROBE
In the lev. A AOS ovens the lambda probe is used to measure the humidity. How does it work?
The lambda probe permits measurement of oxygen concentration through a solid electrolyte (ceramic
element)
The ceramic part of the probe is in the form of a tube closed at one end. The inside and outside surfaces of
the ceramic sensor have a microporous platinum layer (electrode). The platinum layer, which is in contact
with the analyzed gas, is covered with a highly porous protective ceramic layer.
The ceramic sensor (ZrO2 – solid electrolyte) is heated from inside by means of a ceramic heater so that the
temperature of the sensor ceramic remains above 350 °C. Starting from 300°C, the ZrO2 sensor becomes
conductive 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 determined. In fact the addition of a
third gas to a sample of air has the effect of reducing in a proportional manner the presence of oxygen and
nitrogen so that, as said, determining the relative concentration of oxygen allows the amount of the third
introduced gas of the mixture to be determined (see the diagram).
100
90
80
water
70
60
50
40
nitrogen
30
20
10
oxygen
0
0
10
20
30
40
50
60
70
80
90 100
water percentage
Connections on the lambda probe:
ƒ Pin 1: not used
ƒ Pin 2-3: connections to the main board (connector X23)
ƒ Pin 4-5: connections to the switching feeder
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APPENDIX F – PARAMETER DESCRIPTIONS
Name
5060
6Prb
AbSP
Addr
ALFn
APPL
APPM
bAud
bot
CLPr
CLt1
CLt2
CLt3
CLt4
cort
cot
cu
dbon
dCLn
dEMO
dScb
dSod
dSPS
dtoF
dton
dtSb
dutM
EMME
EnFL
Ertc
FAHr
FrE
Fubo
FucA
GAS
hAbo
HAbP
hAcA
Description
Frequency
Presence of 6-point meat probe (1=yes for lev. A, 0 for lev. B)
Flag to enable starting of cooking closing the door (0=disable; 1=enable)
RS485 address
Activation of cavity motor thermal protection
Level of the oven
Type of oven
RS485 bit rate
Max. steam generator overheating (ETUB alarm)
Length of cooling with humidifier after a steam phase in an automatic cleaning cycle
Length of detergent injection (phase A)
Length of detergent+water injection (phase A)
Length of rinser+water injection (phase C)
Length of water injection (phase C)
Flag to enable cavity temperature displaying adjustment
Max. cooking chamber overheating (ETUC alarm)
Parameter q of SCELOFF=SCEL-(q+m*dT/dt) (FUZZY-LOGIC)
Delay for boiler drain
Flag to disable automatic cleaning cycles (1=disable)
Flag to enable DEMO (0=disable; 1=enable)
Temperature range (from set) above which the middle power is activated in combi
mode
Flag to disable the oven stops when door is open in convection, steam and combi
mode: (0=the oven stops)
Flag to disable pre-heating of the boiler when the oven is in stand-by mode (0=enable
pre-heating; 1=disable)
Max. cooking chamber temperature derivative value for heating elements to be
switched OFF (FUZZY-LOGIC)
Max. cooking chamber temperature derivative value for heating elements to be
switched ON (FUZZY-LOGIC)
Delay for activation of fast filling during opening of boiler drain valve
Maximum length of a phase with cavity temperature over 250 ºC
Parameter m of SCELOFF=SCEL-(q+m*dT/dt) (FUZZY-LOGIC)
Presence of motorised cavity flap (1=yes)
Flag to enable RTC (1=enable)
Temperature unit (°F = 1, °C = 0)
PWM frequency
PWM value at full power of boiler burners
PWM value at full power of cavity burners
Define if the oven is GAS heated (1) or ELECTRIC heated (0)
PWM value at middle power of boiler burners
Steam condenser engagement in "hot air" mode
PWM value at middle power of cavity burners
HAFd
Bypass temperature variation for humidification during hot air mode + open flap
HAFI
By pass isteresys in hot air+open flap mode
HAFS
hAir
Bypass base temperature for humidification during hot air mode + open flap
Hot air hour counter
File: AOS service manual (ENG).008
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Name
hboL
HbYP
HCCP
hcMb
hStM
HUIM
HUon
I
ISG
LAMb
LAnG
MHUM
MISG
nMod
nPrG
OCA1
OCA2
OLbd
OPr1
OPr2
OPr3
OPr4
OPr5
OPr6
pdEr
PI
PPM
Sbc
SbYP
SEAL
SInC
SPHb
SPHF
Stbo
StbP
StcA
StoF
Ston
tbon
tcdb
thMA
tPrm
trMA
trMn
AOS OVENS - Service Manual
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Description
Boiler hour counter
Max humidity value to stop the boiler
HACCP Mode
Combi hour counter
Steam hour counter
Pulse length of manual humidifier
ON phase of the humidifier with combi cycle beetween 50 and 100 degrees
Parameter i of SCELON=SCEL(1+p/400)-i (FUZZY-LOGIC)
Define if the oven is an ISG oven (0 means oven with boiler)
Presence of lambda probe (1=yes)
Language for the menu
Flag manual humidifier 0=Off 1=On
Max temperature allowed for water injection in ISG
Define if the modification of store program is disable
Max number of programs
OFFSET of first cavity probe
OFFSET of second cavity probe
Calibration of the lambda probe
OFFSET of first probe of 6-point meat probe
OFFSET of second probe of 6-point meat probe
OFFSET of third probe of 6-point meat probe
OFFSET of fourth probe of 6-point meat probe
OFFSET of fifth probe of 6-point meat probe
OFFSET of sixth probe of 6-point meat probe
Sample period to calculate the derivative value (FUZZY-LOGIC)
Parameter p of SCELON=SCEL(1+p/400)-i (FUZZY-LOGIC)
Flag to enable Peak Power Management (0=disable; 1=enable)
Cooling temperature set for board ventilation
Bypass temperature with max. cooking cavity steam temperature (calibration)
Altitude above sea level
Boiler temperature that detect presence of scale
Preheating temperature of the boiler
Boiler temperature during leavening
PWM value at start of boiler burners
Steam condenser engagement in "boiler" mode
PWM value at start of cavity burners
Minimum time for "switch off" of boiler
Minimum time for "switch on" of boiler
Timeout for E SL alarm, water level probe alarm
Max water temperature for boiler drain
Define the max. temperature limit for the manual injection of water
Print frequency (0=no print)
Define the max. temperature for water injection during cooling phase
Define the min. temperature for water injection during cooling phase
File: AOS service manual (ENG).008
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APPENDIX G – GAS CALIBRATIONS
AOS061G
CAVITY BURNER
GAS
Injector Aerator
OFFSET Parameters
(hPa) StcA hAcA FucA
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
GAS
Injector Aerator
OFFSET Parameters
(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
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AOS101G
CAVITY BURNER
GAS
Injector Aerator
OFFSET
(hPa)
Parameters
StcA hAcA FucA
G20
7.00
Red
- 0.25
80
26
100
G25
8.00
Red
- 0.25
80
26
100
LPG2/30
5.50
Red
- 0.07÷ 0.00
23
26
100
LPG1
5.70
Red
- 0.15÷ - 0.08 23
26
100
BOILER BURNER
GAS
Injector Aerator
OFFSET
(hPa)
Parameters
Stbo hAbo Fubo
G20
7.00
Red
- 0.10
50
50
100
G25
8.00
Red
- 0.10
40
50
100
G30
5.70
Red
- 0.28
33
45
74
LPG
5.70
Red
- 0.15
33
45
74
LPG conversion for cavity burner for AOS101G
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 condition, cool down
and verify ignitions with cold burner.
If the previous setting does not eliminate whistles or noise, change the 5.70 injector with the 5.50 one and
use the calibrations of LPG2/G30 row: calibrate the offset in the range - 0.07 ÷ 0.00 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.
File: AOS service manual (ENG).008
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Electrolux Professional S.p.A.
Ovens Platform Customer Support
Technical Training & Service
AOS201G
UPPER CAVITY BURNER
GAS
Injector Aerator
OFFSET
(hPa)
Parameters
StcA hAcA FucA
G20
7.00
Red
- 0.25
80
26
100
G25
8.00
Red
- 0.25
80
26
100
LPG2/G30
5.50
Red
- 0.07÷ 0.00
23
26
100
LPG1
5.70
Red
- 0.15÷ - 0.08
23
26
100
LOWER CAVITY BURNER
GAS
Injector Aerator
OFFSET
(hPa)
Parameters
StcA hAcA FucA
G20
7.00
Red
- 0.25
80
26
100
G25
8.00
Red
- 0.25
80
26
100
LPG2/G30
5.50
Red
- 0.07÷ 0.00
23
26
100
LPG1
5.70
Red
- 0.15÷ - 0.08
23
26
100
BOILER BURNER
GAS
Injector Aerator
OFFSET
(hPa)
Parameters
Stbo hAbo Fubo
G20
8.00
Blue
0
42
45
100
G25
8.50
Blue
0
42
45
100
G30
6.15
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 condition, cool down
and verify ignitions with cold burner.
If the previous setting does not eliminate whistles or noise, change the 5.7°0 injector with the 5.50 one and
use the calibrations of LPG2/G30 row: calibrate the offset in the range - 0.07 ÷ 0.00 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.
File: AOS service manual (ENG).008
©Copyright 2002 by Electrolux Professional
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AOS OVENS - Service Manual
(595889300 – ENG)
Electrolux Professional S.p.A.
Ovens Platform Customer Support
Technical Training & Service
AOS102G
CAVITY BURNER
GAS
Injector Aerator
OFFSET
(hPa)
Parameters
StcA hAcA FucA
G20
7.00
Red
- 0.17÷ - 0.10
45
43
100
G25
8.50
Red
- 0.17÷ - 0.10
45
43
100
G30
5.70
Red
- 0.25÷ - 0.18
60
43
100
LPG
5.70
Red
- 0.10÷ - 0.02
60
43
100
BOILER BURNER
GAS
Injector Aerator
OFFSET
(hPa)
Parameters
Stbo 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 possible whistles/noise. After you have found the best working condition, cool down and verify
ignitions with cold burner.
File: AOS service manual (ENG).008
©Copyright 2002 by Electrolux Professional
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AOS OVENS - Service Manual
(595889300 – ENG)
Electrolux Professional S.p.A.
Ovens Platform Customer Support
Technical Training & Service
AOS202G
UPPER CAVITY BURNER
GAS
Injector Aerator
OFFSET
(hPa)
Parameters
StcA hAcA FucA
G20
7.00
Red
- 0.20
45
43
100
G25
8.00
Red
- 0.20
45
43
100
G30
5.70
Red
- 0.20 ÷ - 0.15
40
43
95
LPG
5.70
Red
- 0.10 ÷ - 0.05
40
43
95
LOWER CAVITY BURNER
GAS
Injector Aerator
OFFSET
(hPa)
Parameters
StcA hAcA FucA
G20
7.00
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
GAS
Injector Aerator
OFFSET
(hPa)
Parameters
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
GAS
Injector Aerator
OFFSET
(hPa)
Parameters
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
File: AOS service manual (ENG).008
©Copyright 2002 by Electrolux Professional
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Ovens Platform Customer Support
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AOS OVENS - Service Manual
(595889300 – ENG)
LPG conversion for cavity burners for AOS202G
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 ÷ - 0.05 hPa (upper
cavity boiler) and - 0.15 ÷ - 0.10 hPa (lower cavity boiler) so as to eliminate possible whistles/noise. After
you have found the best working condition, cool down and verify ignitions with cold burner.
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 or noise, change the 6.00 injector with the 5.80 one and
use the calibration of LPG2/G30 row: calibrate the offset in the range - 0.07 ÷ - 0.02 hPa (upper and lower
boiler burner) so as to eliminate possible whistles/noise. After you have found the best working condition,
cool down and verify ignitions with cold burner.
File: AOS service manual (ENG).008
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AOS OVENS - Service Manual
(595889300 – ENG)
APPENDIX H – WATER TREATMENT
File: AOS service manual (ENG).008
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Summary table:
Graph
Hardness
Treatment
Not required
< 5°F
Not required
File: AOS service manual (ENG).008
Not required
> 5°F
Softener
Nanofilter
< 5°F
Nanofilter
Nanofilter
>5°F
Nanofilter
©Copyright 2002 by Electrolux Professional
Osmotizer
< 5°F
Osmotizer
Osmotizer
> 5°F
Osmotizer
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AOS OVENS - Service Manual
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APPENDIX I – CONNECTION TO HACCP SYSTEM
The AOS oven (from firmware 2.7) can be predisposed for the HACCP system through 4 parameters:
HCCP: defines the type of HACCP, i.e.
0: no system
1: HACCP Basic (with printer 881457 – 880048 for US market, i.e. 120V/1ph/60 Hz)
2: HACCP Advanced or Integrated
bAud: bit rate of RS485 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 INTERFACE NO id
In case of HACCP Advanced or Integrated, i.e. setting HCCP to 2, the address of the oven in the AHCCP
network has to be set in the parameter Addr.
File: AOS service manual (ENG).008
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