DOMINA 80 E
58
Chart 4
Check fan/flue gas system
Does fan run?
Is 230V present across
terminals X1-3 and X1-6
of ignition control?
Is relay RY02 switch ON?
NO
NO
Go to charts 2-3
NO
Is 230V present across
fan terminals?
YES
YES
Check air pressure
switch wiring connection
NO
Check and if
necessary replace
air pressure switch
NO
Check and if
necessary replace fan
YES
Is air pressure switch
activated?
YES
NO
Check and if
necessary replace
air pressure switch
YES
Differential air pressure
across the air pressure
switch is greater than
175 Pascal? (1-75 mbar)
Go to chart 5
YES
NO
Check and clean fan
Check flue and air
intake are correct
and clean
Check Venturi and
air pressure switch
tubes are clean
Check diaphragm
is correct
Check
connection wires
Check and
if necessary
replace
ignition PCB