Ferroli Optimax 25 C Instructions For Installation, Use And Maintenance Manual page 28

Fault
F25
Software fault
No flame after the ignition
F26
phase (5 times in 4 min.)
F30
Flow sensor fault
Flow sensor fault
F31
Supply voltage under 190V.
F34
or over 250V.
F35 Irregular mains frequency
Main PCB trouble
F36
F37 Incorrect system water
pressure
Return sensor fault
F43
Return sensor fault
F44
Flue sensor fault
F45
Flue sensor fault
F46
28
Possible cause
• Software operating fault
• Detection electrode faut
• Flame instable
• Incorrect valve gas Offset
• Flue gas circuit obstructed
• Siphon obstructed
• Sensor damaged or short
circuited
• Sensor damaged or wiring
broken
• Electric mains trouble
• Electric mains trouble
• Faulty CVBC
• Water on CVBC
• Pressure too low
• Sensor damaged
• Sensor damaged or wiring
shorted
• Sensor damaged or wiring
broken
• Sensor damaged or wiring
shorted
• Sensor damaged or wiring
broken
Optimax 25 C
Cure
• Cut off and restore the electricity
supply. If the trouble remains,
check and/or change the CVBC
• Check that the electrode is correct
positioned and is necessary change
it
• Check the burner
• Check Offset at the minimum power
• Check if flue gas circuit is free
• Check and if necessary change the
siphon
• Check the wiring or change
the sensor
• Check the wiring or change
the sensor
• Check the electrical system
• Check the electrical system
• Change the electronic CVBC
• Fill the system
• Check the sensor
• Check the wiring or change the
sensor
• Check the wiring or change the
sensor
• Check the wiring or change the
sensor
• Check the wiring or change the
sensor