SIRe Advanced Fan Heater Water
38
GB
Alarm and error codes
SIRe has different alarms and error codes for
safe and problem free operation.
If alarms or error codes have been indicated
these must be reset in order to return to
normal operation, for example activating the
heating again. Fan mode is active even when,
for example, the over heating alarm has been
indicated.
Displaying alarm and error codes
In event of alarm or error the alarm/error
code is shown in the status window. In event
of alarm/error code the unit it applies to is
displayed.
See Table - Alarms and Table – Error codes.
Reset alarm
Note! Before resetting, check that the fault is
rectified and there is nothing to prevent the
unit from being recommissioned!
When the fault is rectified, the alarm is
reset by pressing the forward arrow and
selecting Reset alarm and then confirm.
If several units give an alarm at the same
time, the fact that there are several alarms
is indicated, but only one is shown in the
display. By resetting that alarm the next
alarm can be read.
At the first start up alarm and error codes
can occur, these can usually be reset without
action.
Overheat protection
The overheat protection is designed to limit
the temperature of the heater to a maximum
of +90° C. If the temperature should exceed
95°C e.g. in the event of a faulty valve or
actuator, the fan starts to speed up to keep
the temperature down.
At the same time there is an overheating
alarm A2. At internal temperatures of +100°C
the fan runs at maximum speed.
If the unit cools, heating is automatically
reengaged. The alarm remains in the control
unit’s display. If the unit overheats twice
within an hour, the fan operates until the
alarm is reset.
Power failure
Note that in case of power failure the time
settings need to be checked, if the time is not
set correctly week program will be affected.
Frost protection function
The frost protection function is intended to
prevent the water coil from freezing.
When the fan is in operation the valve
actuator opens the valve at an internal
temperature below +15°C regardless of
whether there is a heating requirement. If the
internal unit temperature continues to drop,
e.g. at low ambient temperatures, insufficient
flow line temperatures, low flow or fault valve
function, the frost protection alarm A3 will be
triggered when the internal unit temperature
drops +5°C. The fan then also stops and when
the mixing cabinet is used the dampers is also
closed.
With return temp. sensor SIReWTA
connected an advanced alarm function
occurs. At return temperatures less than
+15°C the actuator will open regardless of
the heat demand. Alarm is triggered at return
tempe7°C and the fan also stops.
When the fan is not running there is a heat
retention function that opens the valve when
the water’s return temperature falls below
+25°C regardless of heat demand.
Note! In event of repeated alarms,
overheating alarms and frost protection
alarms, carry out a thorough check and if
the fault cause cannot be found contact
authorised installer or Frico.
