Appendix D - Troubleshooting - Electrolux AOS061E Series Service Manual

Electrolux Professional S.p.A.
Ovens Platform Customer Support
Technical Training & Service
Oven Problem
Humidity bar always
AOS of red or blue colour
(or switched off)
In the recipe menu
the cleaning
AOS
programs are
present
The user interface
AOS board does
switch on
The oven does not
AOS switch on and the
ON/OFF led is off
The oven does not
AOS switch on and the
ON/OFF led is on
The user interface
board does switch on
AOS
but no load
activated
File: AOS service manual (ENG).008
APPENDIX D – TROUBLESHOOTING
Analysis
not
not
Switching off
switching the oven on
again after
minutes, the
starts again
The previous
analysis had
negative result
is
©Copyright 2002 by Electrolux Professional
AOS OVENS - Service Manual
(595889300 – ENG)
Probable anomaly
Parameter dCln set
to 1
Main board
powered
and
Overtemperature
few
the main board
oven
Defective electronic
a component on
main board
Fuse F2 burnt
Checks/causes
1) Check if the lambda
probe is fed: 9.5 Vdc from
the relevant switching
feeder
2) If 9.5 Vdc are not
present, check
switching feeder
supplied with 230 Vac
from the main board
3) Check the fuse on the
switching feeder
4) Check the connection
of the probe on the main
board
5) Check the connections
on the lambda probe
6) Change the lambda
probe
7) If the humidity bar is
switched off, check
parameter LAMb is set to
1
Check and set parameter
dCln to 0
1) Check the
connection of the power
supply cables of the user
interface board on the
main board
2) Check he connection of
the flat cable on the main
board
1) Check if voltage is
present (24 Vac) at the
main board input
not connector)
2) Check voltage output
(24 Vac) on
transformer
3) Check F1 fuse
1) Check the working of
the cooling fan
of
2) Check the openings on
the bottom of the control
panel are not clogged
the Change main board
Check fuse
if the
is
if
correct
(X1
the
P.24/40