Fault code
Fault
Exchanger protection interven-
A09
tion
Overtemperature protection
F09
intervention
F10
Flow sensor fault
A11
Gas valve connection
F11
Return sensor fault
F12
DHW sensor fault
F13
Fume probe fault
Fume extraction duct safety
A14
device intervention
F15 - A07
High fume temperature
F19
Card parameter fault
System pressure slightly high
F21
(visible only in the Alarm menu)
A23-A24-F51
Pressure sensor fault
Intervention of fault F40 more
A26
than 3 times in 24 hours
F34
Supply voltage under 180V
F35
Wrong supply frequency
F37
Incorrect system water pressure
F39
External probe fault
F40
Pressure sensor fault
A44
Multiple requests error
Pressure transducer no commu-
F47
nication
328
BlueHelix HiTech RRT H
Possible cause
No water circulation in the system Check the circulating pump and heating system
Poor circulation and anomalous
flow probe temperature increase
blocked exchanger
Flow sensor damaged
No water circulation in the system Check the circulating pump and heating system
Air in the system
Sensor damaged
Wiring shorted
Wiring disconnected
Gas valve connector not inserted. Insert the connector
Electrical connection between
control unit and gas valve inte-
rrupted.
Gas valve damaged.
Sensor damaged
Wiring shorted
Wiring disconnected
Sensor damaged
Wiring shorted
Wiring disconnected
Probe damaged
Wiring shorted
Wiring disconnected
Fault A07 generated 3 times in
the last 24 hours
The fume probe detects an
excessive temperature
Wrong card parameter setting
System water pressure too high
Wrongly configured parameter
System pressure problems
(transducer)
b06 set to 3
System water pressure too high
Expansion vessel discharged or
damaged
Electric mains trouble
Electric mains trouble
Pressure too low
Pressure transducer not connec-
ted or damaged
Probe damaged or wiring shorted Check the wiring or replace the sensor
Probe disconnected after activa-
ting the sliding temperature
System water pressure too high
and parameter P58 not set to
default
Expansion vessel discharged or
damaged
Repeated short-term requests
Pressure transducer not electri-
cally connected
Pressure transducer not working Replace the pressure transducer
cod. 3541V484 - Rev 02 - 01/2024
Cure
Vent the system
check the exchanger and system
Check correct positioning and operation of the
flow sensor and replace it if necessary
Vent the system
Check the wiring or replace the sensor
Check the wiring
Replace the gas valve
Check the wiring or replace the sensor
Check the wiring or replace the sensor
Check the wiring or replace the fume probe
See fault A07
Check the exchanger
Check the fume probe
Check the flue material parameter
Check and if necessary modify parameter b15 to
3
Partially drain the system to a pressure (shown
on the display) of 1÷1.5 bar.
Check the expansion tank
Check if the parameter b04 is correctly configu-
red
System pressure value outside set limits (trans-
ducer)
Partially drain the system to a pressure (shown
on the display) of 1÷1.5 bar
Charge or replace the expansion vessel
Check the electrical system
Check the electrical system
Fill the system
Check the pressure transducer
Reconnect the external probe or disable the sli-
ding temperature
Partially drain the system to a pressure (shown
on the display) of 1÷1.5 bar
Charge or replace the expansion vessel
Check if there are pressure peaks in the DHW
circuit. If necessary, modify parameter b11.
Check the electrical connection, transducer con-
nector and wiring.
EN