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7
TROUBLESHOOTING
7.1 Alarm management
Alarms are indicated by an acoustic signal (if activated) and a message on the control panel.
In case of an alarm, shut down the boiler, eliminate the cause and restart the boiler according to the normal
procedure described in this manual.
Every alarm status causes immediate boiler shutdown.
The alarms, with causes and cures, which can appear on the control panel are listed below:
Signalling
AL 1
POWER
-The boiler does not start.
FAILURE
-Occurs in case of a fume
AL 2
temperature probe fault.
FUME
-The shutdown procedure is
PROBE
activated.
-Occurs if the fume probe
detects a fume temperature
AL 3
above 280°C.
HOT FUMES
-The shutdown procedure is
activated.
-Occurs when the fume
AL 4
extraction fan is faulty.
-The shutdown procedure is
FAN FAIL
activated.
-No flame in ignition stage.
AL 5
-The shutdown procedure is
NO IGNITION
activated.
AL 6
- Brazier not fed with pellets.
NO PELLETS
-Occurs in case of cutting in of
AL 7
the auger duct temperature
THERMAL
safety thermostat.
SAF
-The system is stopped.
In the work stage the boiler
-
AL 8
detects a pressure below the
NO NEG
vacuum switch setting
threshold.
PRESS
-The system is stopped.
AL 9
-Appears when the combustion air
INSUFF
flow is below a certain threshold.
DRAUGHT
ALARMS - MESSAGES
Fault
-No power during the lighting
stage.
-Probe fault.
-The probe is disconnected
from the board.
-Too many pellets.
-Reduced heat exchange
in the system.
-The fume fan is blocked.
-Faulty speed control sensor.
-No power to fume fan.
-The pellet hopper is empty.
-The heater is faulty, dirty or not
correctly positioned.
-Pellet load setting incorrect.
-The pellet hopper is empty.
-The pellet loading gearmotor
has to adjust.
-The gearmotor does not load
pellets.
-The safety thermostat has
detected a temperature above
the setting threshold due to
overheating of the bottom part
of the hopper blocking
gearmotor operation.
The combustion chamber is dirty.
-
-The fume duct is obstructed.
-The fire door is not closed.
-The overpressure valves are
open-stuck.
-Faulty vacuum switch.
-The combustion chamber is dirty.
-The fume duct is obstructed.
-The fire door is not closed.
-The overpressure valves are open-
stuck.
-Faulty air flow meter.
65
Possible causes
Cures
-Turn
the
boiler
OFF
pressing the button P4 and
repeat the lighting procedure.
-Other reinstatement
operations must be carried
out by a service centre.
-Reinstatement operations
must be carried out by a
service centre.
-Adjust the pellet flow.
-Other reinstatement
operations must be carried out
by a service centre.
-Reinstatement operations
must be carried out by a
service centre.
-Check pellets in hopper.
-Check the lighting
procedures.
-Other reinstatement
operations must be carried
out by a service centre.
-Check pellets in hopper.
-Adjust the pellet flow
-Other reinstatement
operations must be carried
out by a service centre.
-Check the cause of excessive
overheating.
-Reset the relevant safety
thermostat by pressing the
reset button.
-Check cleanness of the fume duct
and combustion chamber.
-Check hermetic closing of the door.
-Check closing of the overpressure
valves.
-Other reinstatement operations must
be carried out by a service centre.
-Check cleanness of the fume duct
and combustion chamber.
-Check hermetic closing of the door.
-Check closing of the overpressure
valves.
-Other reinstatement operations must
be carried out by a service centre.
NATURFIRE 17-25 HR
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