Ferroli MAXIMA 35 C, Instructions For Use, Installation And Maintenance

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29
Maxima 35 C
Incorrect system water
pressure • Pressure too low
• Sensor damaged • Fill the system
• Check the sensor
Fault Possible cause Cure
Software fault • Software operating fault • Cut off and restore the electricity
supply. If the trouble remains,
check and/or change the main P.C.B.
CH flow sensor fault • Sensor damaged or short
circuited • Check the wiring or change
the sensor
CH flow sensor fault • Sensor damaged or wiring
broken • Check the wiring or change
the sensor
F25
F30
F31
F37
F40
Supply voltage under 190V.
or over 250V. • Electric mains fault • Check the electrical system F34
Irregular mains frequency • Electric mains fault • Check the electrical system
F35
Main P.C.B. fault
F36
• Change the P.C.B.
• Pressure too high above
3 - 5 bar
• Check the fill loop not passing
• Check the wiring and sensor
• Check the safety valve
• Check the expansion vessel
Incorrect system water
pressure
F41
• Sensor damaged or wiring
broken • Check the wiring or change the
sensor Pressure sensor fault
F43
• Sensor damaged or wiring
shorted • Check the wiring or change the
sensor Return sensor fault
F44
• Sensor damaged or wiring
broken • Check the wiring or change the
sensor Return sensor fault
F45
• Sensor damaged or wiring
shorted • Check the wiring or change the
sensor Flue gas sensor fault
F46
• Sensor damaged or wiring
broken • Check the wiring or change the
sensor Flue gas fault
Flame absence after ignition
phase F26
• Faulty main P.C.B.
• Water on P.C.B.
External probe fault • Sensor damaged or short-
circuited
• Check the wiring or replace the
sensor
F39
F47
• Wiring interrupted
• Sensor damaged • Check the wiring
• Replace the sensor Probe pressure fault
• Ionization electode fault
• Flame instable
• Gas valve Offset fault
• Air inlet/flue outlet pipes
blocked
• Air-trap blocked
• Check ionization electrode position
and eventually replace it
• Check the burner
• Verify Offset setting to the minimum
power
• Take blockage off the chimney, flue
outlet pipes and air inlet pipes
• Check and eventually clean the air-
trap