Electrolux AOS061E Series Service Manual page 25

Electrolux Professional S.p.A.
Ovens Platform Customer Support
Technical Training & Service
Oven Problem
In the recipe menu
only signs like
AOS
Sxx" o "Sxx"
appearing
AOS Heating of the boiler
elt is slow
AOS Heating of the cavity
elt is slow
The fan of a burner is
AOS
working always at the
gas
maximum speed
AOS The fan of a burner
gas does not start
File: AOS service manual (ENG).008
Analysis
"P:
are
©Copyright 2002 by Electrolux Professional
AOS OVENS - Service Manual
(595889300 – ENG)
Probable anomaly
EEPROM of the main
board is
programmed
Heating element
burnt
Contactors
working
Heating element
burnt
Contactors
working
PWM signal
present
The fan is
powered (24 Vdc)
PWM signal at 0
Checks/causes
Change EEPROM or main
not
board
Check that all
branches of the boiler
heating elements
working
Check correct working of
not
the contactors
appendix B)
Check that all
branches of the cavity
heating elements
working
Check correct working of
not
the contactors
appendix B)
1) The connector of PWM
signal (X9) on the main
not
board is not connected
2) PWM signal cable is
interrupted
1) Check if the fan is
powered: 24 Vdc from the
not 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,
fan. If the fan starts,
change main board.
the
are
(see
the
are
(see
change
P.25/40