Ferroli OPTIMAX HE PLUS 25 S Instructions For Use, Installation And Maintenance page 29

OPTIMAX HE PLUS 25 S
Fault
F13
Flue sensor fault
F14
Flow sensor fault
F15
Fan problem
F34
Supply voltage under 180V.
F35
Irregular mains frequency
F37
Incorrect system water pressure
F40
Incorrect system water pressure
F42
Flow sensor fault
F47
N/A for UK
Possible cause
Sensor damaged or wiring shorted
Sensor damaged or wiring broken
Sensor damaged or short circuited
Sensor damaged or wiring broken
Tachometer signal interrupted, fan
connection
Fan damaged, debris in fan
Electric mains fault
Electric mains fault
Pressure too low
Sensor damaged
Pressure too high above 3 - 5 bar
Sensor damaged
Wiring interrupted
Sensor damaged
Cod. 3540R540 - 02/2009 (Rev. 00)
Cure
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
Check the wiring and fan
Check the fan, clean debris
Check the electrical system
Check the electrical system
Fill the system
Check the sensor
Check the fi lling loop is not passing and discon-
nected
Check the wiring and sensor
Check the safety valve
Check the expansion vessel
Change the sensor
Check the wiring
Replace the sensor
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