Ferroli F24 Installation, Servicing And User Instructions Manual page 41

Ferroli F24
Is relay RY100 switch ON?
YES
Go to charts 2-3
Is 230V present across
fan terminals?
NO
Check air pressure
switch wiring connection
NO
Check and if
necessary replace
air pressure switch
YES
Normal operation
carry out
Check fan/fl ue gas system
Does fan run?
NO
NO
YES
Check and if
necessary replace fan
Check D.H.W. and C.H. modulation
Boiler operated
on central heating mode
Does burner
flame modulate?
NO
Check wiring connection
to CH sensor
Check CH sensor
and replace it if necessary
Chart 4
YES
Is air pressure switch
activated?
Differential air pressure
across the air pressure
switch is greater than
180 Pascal?
Check and clean fan
Check flue and air
intake are correct
and clean
Check Venturi and
air pressure switch
tubes are clean
Check restrictor
is correct
Chart 5
Boiler operated
on DHW mode
Does burner
flame modulate?
NO
Check wiring connection
to DHW sensor
Check DHW sensor
and replace it if necessary
YES
NO
Go to chart 5
YES
Check and if
necessary replace
NO
air pressure switch
YES
Normal operation
carry out
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