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Technical Training & Service
AOS OVENS - Service Manual
(595889300 – ENG)
Oven Problem
Analysis Probable
anomaly Checks/causes
AOS
gas
The cavity burner is
whistling or
grumbling
Gas-air mixture not
correct
1) Check PWM
parameters for the cavity
burner
2) Check offset pressure
3) Check injector
4) Check aerator
5) With LPG on 10-20 grid
ovens (1/1 or 2/1), check
the presence of the flange
after the burner fan
6) Set to 0 the parameter
Sbc
in order to have the
cooling fan always
working supplying with air
the burners
AOS
gas
The boiler burner is
whistling or
grumbling
Gas-air mixture not
correct
1) Check PWM
parameters for the boiler
burner
2) Check offset pressure
3) Check injector
4) Check aerator
5) Set to 0 the parameter
Sbc
in order to have the
cooling fan always
working supplying with air
the burners
6) Check integrity of the
gasket of the boiler burner
AOS
gas
The main board is
switching off/on by
itself
1) Check the separation
between high voltage and
low voltage cables
Coupling of high
voltage and low
voltage circuits
2) Check integrity of
ignition cables: they must
not be cracked
discharging towards inner
components of the oven
3) Reinforce the insulation
of the ignition cables with
a silicon pipe
File: AOS service manual (ENG).008
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