Ferroli Optimax HE 31 C Instructions For Installation, Use And Maintenance Manual page 31

OPTIMAX HE 31 C
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
F39 External probe fault
F40 Incorrect system water pressure
F42 Flow sensor fault
F47 N/A for UK market
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 supply problem
Electric supply problem
Pressure too low
Sensor damaged
Sensor damaged or short-circuited
Pressure too high above 3 - 5 bar
Sensor damaged
Wiring interrupted
Sensor damaged
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 wiring or change the sensor
Check the fi ll loop not passing
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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