BOILER STATUS
MALFUNCTION
PROBABLE CAUSE
SOLUTION
The boiler has shut down, the red
light no. 1 is on.
Burner does not ignite.
Reset by pressing no. 16 button
Gas supply failure
Check gas network pressure
Check gas network safety valves to
be open
Gas valve is disconnected
Reconnect gas valve
Gas valve is faulty
Replace it
PCB is faulty
Replace it
Burner does not ignites, there is no
spark.
Reset by pressing no. 16 button.
Spark electrode is faulty
Replace the electrode
Flame detection PCB is faulty
Replace PCB
Burner ignites for a few seconds and
turns off.
Reset by pressing no. 16 button.
PCB does not detect flame: inverted
phase and neutral
Verify correct neutral and phase
connections
Flame detection electrode wire is
disconnected or faulty
Connect flame detection electrode
wire or replace it
Flame detection electrode is faulty
Replace electrode
Flame detection PCB does not detect
flame: it is faulty
Replace flame detection PCB
P ACC Ignition value set point
is too low
Adjust P ACC ignition value set point
Min heat input in not set correctly
Check burner adjustment
The boiler has shut down and
red light no. 2 is on.
Reset by pressing no. 18 button.
Safety thermostat has shut the boiler
down
Water is not flowing in the CH system:
pipes are clogged, thermostatic
valves are closed, intercepting valves
in the system are closed
Check CH system
Pump is blocked or faulty
Check the pump
Plate heat exchanger is clogged
Check the plate heat exchanger
The boiler has shut down and red
light no. 4 is flashing.
Restore correct water pressure
Insufficient water pressure
Possible water leaks
Check system for leaks
Pressure switch is disconnected
Reconnect it
Water pressure switch is faulty
Replace it
The boiler has shut down, red light
no. 5 is flashing.Boiler will
automatically resume operation as
soon as the problem is solved
Flow probe is faulty
Flow probe is disconnected
Reconnect it
Flow probe is faulty
Replace it
The boiler has shut down and red
light no. 6 is flashing.
Boiler will automatically resume
operation as soon as the problem is
solved
Boiler communication to and from
remote control is faulty
Connecting wire is faulty
Check connecting wire
The boiler has shut down, red light
no. 7 is flashing.
Boiler will automatically resume
operation as soon as the problem is
solved
Water tank is faulty
Water tank probe is disconnected
Reconnect it
Water tank probe is faulty
Replace it
The boiler has shut down, red light
no. 8 is flashing.
Boiler will automatically resume
operation as soon as the problem is
solved
Plate heat exchanger probe is faulty
Plate heat exchanger probe is discon-
nected
Reconnect it
Plate heat exchanger probe is faulty
Replace it
The boiler has shut down, red light
no. 9 is flashing (BTN model only).
Reset by pressing no. 19 button.
Flue gas thermostat is not consenting
to boiler operation
Flue gas thermostat is faulty
Check flue gas thermostat operation:
replace when faulty
Air inlet or flue gas discharge flow is
not adequate
Check air inlet/flue gas discharge
ducts: clean or replace as necessary
5. TROUBLESHOOTING
22