3.4.4 Alarm
Some events may alter the functionality of the device in
an undesired manner. These events trigger alarms in
the system that remains stored in the device’s memory.
Reasons for alarms are: troubles with the internal or
the external heat sensor, problems with elements and
overheating (Table 3).
CURRENT: Shows alarms
currently afflicting the
device.
PAST: Shows a history
of alarms triggered by
the device. This allows
to revisit the previous 25
alarm messages with an
approximated time span
since they happened.
CLR ALARM: Clears the alarm history.
3.4.5 Boost Mode
The boost mode menu
allows the user to raise
the boiler’s temperature
set point by 10 degrees
Fahrenheit during 24 hours.
Press the central button
while in this menu to
activate or deactivate this
measure.
3.4.6 Dual Energy
This menu is available when
the dual energy setting is
set in the installer menu.
This allows to manually set
the desired energy source.
As shown on the screen, pressing the central button
will change the energy source. The choices are
AUTO
(automatic switching between the two modes, normal
operation),
ELEC
or
AUX
(auxiliary heat).
3.4.7 Consumption
The consumption menu shows an approximated value of
the power consumed by the boiler since it’s last reset.
Consumption is written in
kilowatt hour and time since
last reset is given in hours or
in days.
As shown on the screen, pressing the central button will
reset the time and power consumed.
Table 3 – Alarm Description
Alarm Description Possible causes
The boiler temperature Misconnected sensor
T in sensor returns a temperature T in and T ext inverted
that is not within standard Damaged wire
values Defective sensor (see table 7)
The outdoor temperature Misconnected sensor
T out sensor returns a temperature T in and T ext inverted
that is not within standard Damaged wire
values Defective sensor (see table 7)
The control is experiencing The high limit aquastat is not set properly (see section 3.3.1)
Overheat an increase in temperature External heat source active in dual energy systems
when it does not send Defective relay or element
command to elements
The temperature in the An element is broken
Element boiler does not increase The load is more important than usual (large house,
at a standard rate concrete floor, beginning of season)
Not all elements are heating (Check the current
drawn by the unit against the one on the rating plate)
10
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