Alarm Table - Carel heaterSteam User Manual

ENG
The following table shows the alarms that can be displayed by the controller, with the corresponding description, causes and possible solutions.
Alarm Cause
Autotest failed Probable problems with:
alarm feedwater, level control, fi ll solenoid
valve
Note:
warnings relating to the events that
generated the alarm (autotest warning,
level sensor warning, low production
warning)
High conductivity High water conductivity warning
warning
High conductivity High feedwater conductivity alarm
alarm
Level sensor The level sensor may not be working
malfunction alarm correctly
Motor protector The PTC probes in the heaters have
alarm measured an excess temperature
Klixon activated
No water alarm No feedwater
Low production Input power not available; with the unit
alarm on, there is no steam production or
water preheating;
Float blocked in high level position.
Main probe broken Main room probe not connected or
or disconnected damaged
alarm
Limit probe broken Limit probe or second probe not con-
or disconnected nected or damaged
alarm
Pre-heating probe NTC water temperature probe not
broken or discon- connected or damaged
nected alarm
High humidity/ High humidity in the room (high tempera-
temperature ture with temperature control)
warning
Low humidity Low humidity in the room
warning
High limit humidity High humidity at outlet
warning
Foam warning Entrainment of foam in the cylinder
during boiling
Maintenance pre- Planned maintenance reminder
alert
"heaterSteam" +0300080EN - rel. 1.0 - 27.04.2016

13. ALARM TABLE

Possible solution
Make sure that the unit receives water
Switch the unit off and clean the level control and the fi ll
valve
check the alarm log for any
Check feedwater conductivity
If necessary, feature 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 cylinder, the level sensor
and the fi ll solenoid valve
Check correct water supply to the cylinder
Manually reset the Klixon
The problem depends on operation without water or excessi-
ve scale on the surface of the heaters
Switch the unit off and, when it has cooled down, clean the
cylinder, the heaters and the level control, making sure the
components are intact
Check that the electrical and water connections are in order
and that the unit is powered correctly
It may be necessary to replace the PTC sensors
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 cylinder due to
gravity
Check that the steam outlet pipe is not choked or that there
are no pockets of condensate
Check that the level sensor is working correctly, clean if
necessary
With the unit off and disconnected from the mains power
supply, check that there are no defective or faulty electrical
connections
Check electrical continuity of the heaters
Clean the level sensor
Check probe connection and the type of control selected
Check probe connection and the type of control selected the
type of control choice
Check preheating operation and the settings of the parame-
ters on screen eb02;
Check operation of the probe and the limits set on screen c01 Automatic
Check operation of the probe and the limits set on screen c01 Automatic
Check the operation of the outlet limit probe
The entrainment of foam is generally due to the presence
of surfactants in the water (lubricants, solvents, detergents,
water treatment or softening agents) or an excessive concen-
tration of dissolved salts.
Purge the feedwater lines
Clean the cylinder
Stop the unit and carry out complete maintenance on the
humidifi er, then reset the "cylinder operating hours" counter
(screen ea07)
56
Reset Alarm relay Action
Restart required Closed Total
shutdown
Manually reset the Open Signal only
warning
Restart Closed
required
Restart required Closed Total
shutdown
Stop - restart Closed Total
required shutdown
Manual/ Auto- Closed Stop
matic production
Manual Closed Stop
production
Manual Closed Stop
production
Manual Closed Stop
production
Automatic Closed Stop
production
Open Signal only
Open Signal only
Automatic Open Signal only
Automatic Open Signal only
Automatic (reset Open Signal only.
operating hours) Shutdown
unit in
relation of
the water
hardness.