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
AOS
In the recipe menu
only signs like "P:
Sxx" o "Sxx" are
appearing
EEPROM of the main
board is not
programmed
Change EEPROM or main
board
Heating element
burnt
Check that all the
branches of the boiler
heating elements are
working
AOS
elt
Heating of the boiler
is slow
Contactors not
working
Check correct working of
the contactors (see
appendix B)
Heating element
burnt
Check that all the
branches of the cavity
heating elements are
working
AOS
elt
Heating of the cavity
is slow
Contactors not
working
Check correct working of
the contactors (see
appendix B)
AOS
gas
The fan of a burner is
working always at the
maximum speed
PWM signal not
present
1) The connector of PWM
signal (X9) on the main
board is not connected
2) PWM signal cable is
interrupted
The fan is not
powered (24 Vdc)
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
AOS
gas
The fan of a burner
does not start
PWM signal at 0
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.
File: AOS service manual (ENG).008 ©Copyright 2002 by Electrolux Professional P.25/40
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