Alarm And Troubleshooting Chart - Carel gaSteam UG045 05 Serie Manual De Servicio

4. ALARM AND TROUBLESHOOTING CHART

Table of alarms with advanced troubleshooting information, useful for defi ning how the SW generates alarms and therefore
identifying the cause. Any active alarms will be shown on the corresponding screen with direct access from the display. The
Alarm icon starts fl ashing; pressing the Alarm button once displays the type of alarm. In the event of potentially dangerous
alarms, the humidifi er 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:
• the alarm is reset automatically or manually: the humidifi er starts again and the alarm relay is deactivated;
• 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Even if no longer active, the alarm status continues to be indicated until "reset display" button is pressed.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
ALC01 Autotest failed
(unit shutdown)
ALW03 High conductivi-
ty warning
ALC02 High conduc-
tivity (unit
shutdown)
ALC03 Level sensor
blocked (unit
showdown)
ALB01 No water
ALB02 Low
production
ALA01 Main probe
broken or
disconnected
ALA02 Limit probe
broken or
disconnected
ALA03 Preheating
probe broken or
disconnected
ALH01 High humidity/
temperature
(main probe)
ALH02 Low humidity/
temperature
(main probe)
gaSteam +0300123ML rel. 1.0 - 03.12.2021
Cause
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)
High water conductivity
warning
High feedwater conductivity
alarm
The level sensor may not be working
correctly
No feedwater
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
Main room probe not connected or
damaged
Limit probe or second probe not
connected or damaged
NTC water temperature probe not
connected or damaged
High humidity in the room (high tem-
perature with temperature control)
Low humidity in the room
Possible solution
• Make sure that the unit receives water
• Switch the unit off and clean the level control
and the fi ll valve
• Check feedwater conductivity
• If necessary, install a suitable water treatment
system
• The problem cannot be solved by softening
the feedwater
• 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
• Switch the unit off and clean the boiler, the
level sensor and the fi ll solenoid valve
• Check correct water supply to the boiler;
• 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-pres-
sure 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 correct-
ly, clean if necessary
• 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
Check probe connection and
the type of control selected
Check probe connection and the type of
control selected
Check preheating operation and the settings of
the parameters on screen Eb02;
Check operation of the probe and the limits set
on screen c01
Check operation of the probe and the limits set
on screen c01
ENG
Reset Action
Restart required Total shut-
down
Manually reset Signal
the warning only
Closed
Restart required Total shut-
down
Manual / Auto- Stop pro-
matic duction
Manual Stop pro-
duction
Manual Stop pro-
duction
Manual Stop pro-
duction
Automatic Stop pro-
duction
Automatic Signal
only
Automatic Signal
only
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