BLUEHELIX MAXIMA
217EN
cod. 3541U630 - Rev. 00 - 07/2020
F17
A13
Fume probe fault
Probe damaged
Check the wiring or replace the fume probeWiring shorted
Wiring disconnected
A14
Fume extraction duct safety
device intervention
Fault F03 generated 3 times in
the last 24 hours
See fault F03
A23
Optimum water pressure not
reached in foreseen time
Water supply trouble Check the connection to the water supply
Loading valve blocked in clo-
sed position
Check the loading valve and valve control relay
A24
Water pressure restored more
than 3 times in 24h
Heating system leaks Check for leaks in the heating system
DHW exchanger damaged Check the exchanger
A26
Excessive water pressure
more than 3 times in an hour
Pressure too high Expansion
vessel empty or damaged
Partially drain the system
Expansion vessel empty or
damaged
Check the expansion vessel
F34 Supply voltage under 170V Electric mains trouble Check the electrical system
F20
F37
System water pressure too
low
Pressure too low Fill the system
Water pressure switch/pres-
sure transducer not connected
or damaged
Check the water pressure switch/pressure
transducer
F39 External probe fault
Probe damaged or wiring shor-
ted
Check the wiring or replace the sensor
Probe disconnected after acti-
vating the sliding temperature
Reconnect the external probe or disable the sli-
ding temperature
F41
Activation of maximum
DELTA T protection
Heating sensor damaged
Check the correct positioning and operation of
the heating sensor
Return sensor damaged
Check the correct positioning and operation of
the return sensor
No water circulation in the sys-
tem
Check the circulating pump
Air in the system Vent the system
F21
F40
System water pressure too
high
Pressure too high Partially drain the system
Filling valve blocked in open
position
Check the filling valve and valve control relay
Expansion vessel empty or
damaged
Check the expansion vessel
F36
A42
Sensor control protection acti-
vation
Return and/or flow sensor
damaged or disconnected
Check the correct positioning and operation of
the return and/or flow sensor
Return sensor damaged or dis-
connected
Check the correct positioning and operation of
the return sensor
F43
Exchanger protection inter-
vention.
No system H
2
O circulation
Check the circulating pump
Air in the system Vent the system
F47 Water pressure sensor error
Water pressure sensor discon-
nected
Check the water pressure sensor wiring
Water pressure sensor dama-
ged
Check the water pressure sensor
F51
Low water pressure with para-
meter b06 = 3
Pressure too low Fill the system
Secondary water pressure
switch disconnected or dama-
ged
Check the water pressure switch/pressure
transducer
Incorrect parameter Check the correct parameter setting
Fault code Fault Possible cause Cure
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