110
ENG
alarm table
g0300122EN rel. 1.0 - 01.12.2021
P/N
Alarm
Cause
Possible solution
Reset
Action
ALP25
Secondary no
water
No feedwater
• Check that the supply pipe to the humidifi er 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 fi ll 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
Stop with
manual reset
Stop produc-
tion
ALM21
Secondary foam
alarm
Entrainment of foam in the boiler
during boiling
• The entrainment of foam is generally due to the pres-
ence of surfactants in the water (lubricants, solvents,
detergents, water treatment or softening agents) or
an excessive concentration of dissolved salts. Purge
the feedwater lines Clean the boiler
Stop with
manual reset
Stop produc-
tion
ALB03
Secondary low
production
Input power not available;
With the unit on, there is no steam
production or water preheating;
fl ue 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 fl ue gas
outlet and air intake;
• burner fl ame malfunction;
• check the connections between the fl ame control
board and the burner, and between the electrical
panel and the fl ame control;
• check the connections between the unit controller
and the intermediate terminal block in the electrical
panel
ALC05
Secondary unit
level sensor
The level sensor may not be working
correctly
• Switch the unit off and clean the boiler, the level
sensor and the fi ll solenoid valve Check correct water
supply to the boiler;
Stop with
manual reset
Stop produc-
tion
ALC06
Autotest failed
alarm on Sec-
ondary
Probable problems with: Feedwater,
level control, fi ll solenoid valve
Notice:
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 fi ll valve
ALW12
Secondary
boiler alarm
Boiler full of water to the
high level sensor on the
cover, without request
for humidifi cation
• Check the fi ll valve for leaks;
• Check whether the high level sensor is dirty;
• Check that there is no condensate return along the
steam hose;
ALC07
Secondary unit
high conduc-
tivity
High feedwater
conductivity alarm
• Switch the unit off and clean the electrodes that
measure the water conductivity
• If the problem persists, change the origin of the feed-
water or feature a suitable treatment system (demin-
eralisation, even partial)
• The problem cannot be solved by softening the
feedwater
Stop with
manual reset
Stop produc-
tion
ALA18
Secondary unit
preheating
probe
NTC water temperature probe not
connected or damaged
• Check preheating operation and the settings of the
parameters on screen Eb02;
Stop with
manual reset
Stop produc-
tion
ALA19
Secondary unit
conductivity
probe
Conductivity meter not connected or
damaged
• Check the connection of the conductivity meter for
measuring feedwater conductivity
Stop with
manual reset
Stop produc-
tion
ALR02
Retain memory
on Secondary
Problem in the electronic controller
• Replace the controller
ALA23
Frost protection
force drain on
Secondary
temperature below 5°C, water drained
using the pump to protect the
humidifi er
• Check the temperature inside and outside of the hu-
midifi er. Increase the temperature inside the humidi-
fi er by fi tting heaters where necessary
Stop with
manual reset
Stop produc-
tion
ALW04
Warning:
Autotest
Probable problems with: Feedwater,
level control, fi ll solenoid valve
Notice:
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 fi ll valve
Signal
only
ALW05
Warning: Level
sensor fault
The level sensor may not be working
correctly
• Switch the unit off and clean the boiler, the level
sensor and the fi ll solenoid valve Check correct water
supply to the boiler;
Signal
only
ALW06
Warning: Low
production
Input power not available;
With the unit on, there is no steam
production or water preheating;
fl ue 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 fl ue gas
outlet and air intake;
• burner fl ame malfunction;
• check the connections between the fl ame control
board and the burner, and between the electrical
panel and the fl ame control;
• check the connections between the unit controller
and the intermediate terminal block in the electrical
panel
Signal
only
ALA14
Secondary unit
offl
ine
Secondary unit offl
ine
-