Ferroli OPTIMAX 25 S Instructions For Use, Installation And Maintenance page 28

Fault
F25
Software fault
No flame after the ignition
F26
phase (5 times in 4 min.)
F30
Delivery sensor fault
F31
Delivery sensor fault
F34
Supply voltage under 190V.
or over 250V.
F35
Irregular mains frequency
F36
Electronic CVBC trouble
F37
Incorrect system water
pressure
F43 Return sensor fault
F44 Return sensor fault
F45 Flue sensor fault
F46 Flue sensor fault
28
Possible cause
• Software operating fault
• Detection electrode fault
• Flame instable
• Incorrect gas valve Offset
• Flue gas circuit obstructed
• Siphon obstructed
• Sensor damaged or short
circuited
• Sensor damaged or wiring
broken
• Electric mains trouble
• Electric mains trouble
• 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 S
Cure
• Cut off and restore the electricity
supply. If the trouble remains,
check and/or change the main 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
• Clean 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