Electrolux 593804600 service manual ƒ An ignition rod and a detection rod

Page 14

Electrolux Professional S.p.A.

Ovens Platform Customer Support

Technical Training & Service

AOS_Q OVENS – Service manual

(593804600 - ENG)

The gas system is made with CO and NOx low emission burner. The main components are the following:

ƒgas valve from SIT type SIGMA 848

ƒAC burner blower that is intaking air through a calibrated mixer where the air–gas mixture is created; then the fun conveys the mixture to the burner

ƒA cavity and a boiler heat exchanger made with a corrugated tube for increasing the efficiency

ƒAn ignition rod and a detection rod

ƒA flame control device

ƒAn external igniter

Starting a cooking cycle, the POW board of the oven activates the flame control device and the burner fan whose speed is controlled with a PWM signal.

The POW board activates the flame control device. From pin 8 of this device a high voltage output (230 Vac) is carried to the relevant burner fan and to the high voltage digital input section of the POW board (X10/5÷8). 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 (a signal that defines the rotating speed of he fan and so the quantity of sucked air and gas) and the 12 Vdc on X9/1 to feed the inner board of the burner fan. The PWM signal changes according to the status of the burner, i.e.:

ƒStart of the burner: controlled with parameters StcA (start of cavity burners) and Stbo (start of boiler burners).

ƒFull power of the burner: controlled with parameters FucA (full power of cavity burners) and Fubo (full power of boiler burners)

ƒHalf 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:

•The POWER board activates the flame control device

•After 1.5 s, the control device activates the fan that start at the speed determined with parameters Stxx

•The flame control device activates the external igniter through pin 14, the igniter generates the spark for 2s and after these, there are 2 s for flame detection

•If the flame is detected, the start speed is maintained for around 10 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 inter purge 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 purging phase and this for five times before the lockout signal.

In case of loosening of the flame signal during working, only one re-ignition attempts takes place.

So if the burner fan is off for at least 0.5 s (the fan is controlled from the flame control device through the 230Vac signal form pin 8), the POW board deduces that the flame control device is going to try again an ignition sequence and then goes back to the beginning of the ignition sequence. If on the contrary the burner fan is off for at least 5 s, the POW board deduces that the flame control device is in lockout.

In case of conversion to different type of gas, besides the injector/diaphragm also the parameters, which control the PWM signal, and the offset pressure calibration have to be changed according to the gas calibration table

NB: In case of changing from natural gas to LPG or G30 in some models, the fan flange (fig. 24) has to be changed; these changes has to be made in

•CAVITY burner of 10 2/1 e 20 2/1 ovens

•BOILER burner of 10 1/1, 10 2/1 e 20 1/1 ovens

File: AOS ONE service manual (ENG).01.doc ©Copyright 2007 by Electrolux Professional

P.14/31

Page 13 Page 15
Image 14
Page 13 Page 15
Contents Authors ContentsProject REF Contribution byCleaning Cycles LEV. a Programming the Default Parameters Advanced ProgrammingFirmware Release Working Temperatures LEV. C LEV. a and BAppendix F Water Treatment Programming the default parameters Advanced programming By-pass calibration only for lev. B, not required on lev.C Lambda probe calibration only for lev. a ovens Cavity offset calibration for lev. a and C ovens Error codesErrors Working temperatures Firmware releaseDetergent Pump Rinse Pump Water Valve Service utilitiesUtilities that can be activated with oven switched on CEL2 Utilities that can be activated in parameter programmingCEL1 Cleaning cycles lev. a Cycles, utilities, important parametersGas system ƒ An ignition rod and a detection rod Gas valve Offeset pressure calibration InjectorUse of manometer for offset pressure measure Change of the microprocessor board Appendix a Water Boiling Point Appendix B Contactors Diagram LEV. a and BAppendix C Connections on Main Board Lev. a Put a jumper to make a short in the not used connections22/31 Connector Description Appendix D Lambda Probe Appendix E Parameter Descriptions Nome DescrizioneOCA1 Appendix F Water Treatment Graph HardnessTo be Defined Appendix G Connection to Haccp SystemAppendix H Relay Descriptions Electric OvensGAS Ovens

593804600 specifications

The Electrolux 593804600 is a high-performance built-in refrigerator that seamlessly combines style, functionality, and advanced cooling technologies. Perfect for modern kitchens, this appliance not only provides ample storage space but also incorporates innovative features designed to keep food fresh and easily accessible.

One of the standout characteristics of the Electrolux 593804600 is its spacious interior, offering a generous capacity that can accommodate a wide array of food items. Its smart design includes adjustable shelves and door bins, allowing for optimal organization and customization according to user needs. The flexible storage options make it easy to store bulky items, ensuring that every bit of space is utilized efficiently.

Moreover, the refrigerator is equipped with advanced cooling technologies, including the DynamicAir feature which ensures an even temperature throughout the unit. This technology minimizes temperature fluctuations, keeping food fresh for longer periods. Additionally, the refrigerator utilizes a Frost-Free system, meaning that users will never have to defrost the unit manually, as it automatically prevents frost build-up.

A key highlight of the Electrolux 593804600 is its integrated Pure Airo filtration system that helps to neutralize odors, ensuring that no unwanted smells transfer between different food items. This feature not only enhances food preservation but also contributes to an overall pleasant kitchen environment.

Energy efficiency is another important aspect of the Electrolux 593804600. It is designed with energy-saving technologies that reduce power consumption without compromising performance. This not only helps in lowering electricity bills but also makes it an eco-friendly choice.

In terms of style, the Electrolux 593804600 boasts a sleek and modern aesthetic with a stainless-steel finish that easily integrates into any kitchen décor. Its built-in design ensures a seamless look, while the push-to-open doors offer convenience and ease of use.

Overall, the Electrolux 593804600 stands out as an exemplary refrigerator that combines spaciousness, advanced cooling technologies, energy efficiency, and stylish design. It is an ideal choice for homeowners seeking a reliable and modern refrigeration solution.
Top Page Image Contents