13. Alarm table
Any active alarms will be shown on the corresponding screen with direct access from the display.
The Alarm icon starts flashing; pressing the Alarm button once displays the type of alarm. In the event of
potentially dangerous alarms, the humidifier automatically stops steam production. For certain alarm
events, as well as the alarm signal, the alarm relay is activated (see the Alarm table). When the cause of the
alarm is no longer present:
l the alarm is reset automatically or manually: the humidifier starts again and the alarm relay is
deactivated;
l the message shown on the display can only be cleared manually.
Even if no longer active, the alarm status continues to be indicated until “reset display” button is pressed.
Alarms that are still active cannot be reset. If there is more than one alarm, the display shows the entire
list. From the alarm screen, the alarm log can be displayed (“Enter” on displays with keypad).
Code Alarm Cause Possible solution Reset Action
ALC01
Autotest
failed (unit
blocked)
Probable problems with:
Feedwater, level control, fill solenoid
valve
Note: check the alarm log for any
warnings relating to the events that
generated the alarm (autotest
warning, level sensor warning, low
production warning)
Make sure that the unit receives water
Switch the unit off and clean the level control and the fill valve
Restart
required
Total
shutdown
ALW03
Warning:
High
conductivity
High water conductivity warning
Check feedwater conductivity
If necessary, feature a suitable water treatment system
The problem cannot be solved by softening the feedwater
Manually
reset the
warning
Signal only
ALC02
High
conductivity
(unit
blocked)
High water conductivity alarm
Switch the unit off and clean the electrodes that measure the water
conductivity
If the problem persists, change the origin of the feedwater or feature
a suitable treatment system (demineralisation, even partial)
The problem cannot be solved by softening the feedwater
Closed
ALC03
Level sensor
blocked
(unit
blocked)
The level sensor may not be working
correctly
Switch the unit off and clean the boiler, the level sensor and the fill
solenoid valve
Check correct water supply to the boiler;
Restart
required
Total
shutdown
ALB01
Missing
water
No feedwater
Check that the supply pipe to the humidifier and the internal tubing
are not blocked or choked and that there is enough pressure (0.1-0.8
MPa, 1-8 bars)
Check operation of the fill solenoid valve
Check that there is not excessive back-pressure in the steam outlet,
preventing water from entering the boiler due to gravity
Check that the steam outlet hose is not choked or that there are no
pockets of condensate
Check that the level sensor is working correctly, clean if necessary
Manual/
Automatic
Stop
production
ALB02
Low
production
Input power not available;
With the unit on, there is no steam
production or water preheating;
flue gas outlet or air intake blocked;
gas shut-off valve closed, burner
and/or controller malfunction
check the gas pressure and that the gas shut-off valve is open;
make sure that the air intake is not blocked;
check the fan power connection;
check operation of the brushless fan, the flue gas outlet and air
intake;
burner flame malfunction;
check the connections between the flame control board and the
burner, and between the electrical panel and the flame control;
check the connections between the unit controller and the
intermediate terminal block in the electrical panel
Manual
Stop
production
ALA01
Main probe
broken or
Main room probe not connected or
damaged
Check probe connection and the type of control selected Manual
Stop
production
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