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AOS OVENS - Service Manual
(595889300 – ENG)
• 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
File: AOS service manual (ENG).008 ©Copyright 2002 by Electrolux Professional P.14/40
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