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
Gas tap is closed Open gas tap
Not correct injector Check injector
Not correct aerator Check aerator
Not correct values in
PWM parameters
the
Check PWM parameters
Too low setting for
ssure
the offset pre
Check offset calibration
Burner fan is
working, "burn xxx"
error after the 3
ignition attempts
Gas valve is not
opening (the offset
pressure during
ignition is very high -
around 1.00 hPa)
1) Check the ignition
device is well fixed and
connected to the gas
valve
2) Faulty gas valve
Burner fan is
working, no ignition
attempts
No continuity on the
bridge between
terminals 5-6-7 of the
ignition device
Restore continuity
Burner fan not
powered (24 Vdc)
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
Burner fan is not
working, "burn xxxx"
error after the 3
ignition attempts
PWM signal at 0
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
AOS
gas
Burner does not light
Burner fan is not
working, "burn xxxx"
error appears with no
ignition attempts after
reset
Lack of 230 Vac
signal on X10/11
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
File: AOS service manual (ENG).008 ©Copyright 2002 by Electrolux Professional P.27/40
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