
45
2012-11
Log boiler [Boiler]
Overview, buttons, functions
SH Operation
switched off because the control system assumes
that the log boiler is to be started up. A correspon-
ding message is displayed.
Malfunction
There is a malfunction in the draught fan, the
exhaust gas temperature sensor or the boiler
temperature sensor.
The boiler may not be
started up in this mode.
Calibrating lambda probe
After every 500 hours of full-load operation,
the boiler performs an automatic calibration of
the lambda probe. This always occurs after an
ember burnout and only at night between 23:00
and 04:00. This calibration can also be initiated
manually by opening the primary and secondary
air valves and flushing the boiler with fresh air
using the draught fan. If the boiler has not been
started up for over 48 hours, this calibration takes
only 30 minutes. If the boiler was in operation
until recently, the calibration can take up to 3
hours. If the boiler is started up during calibration,
the calibration is aborted and started again 9 days
later.
Insulation door open
The insulation door is open. If the boiler was previ-
ously in heating mode, it switches back to heating
mode after the insulation door is closed. For all
other modes, the boiler switches to ignite mode
after "Insulation door open". If the insulation door
stays open for more than 30 minutes, an error
message is displayed and (depending on setting)
an audible signal emitted.
Overtemperature
The boiler temperature is over the temperature
of 90°C set for [Boiler max]. The draught fan is
switched off and an error message indicates that
less fuel should be added in future. Once the boiler
has cooled below 86°C, the draught fan switches
on again and heating resumes.
TWIN in operation
This is only displayed if a TWIN burner (pellets) is
installed on the log boiler.
"TWIN in operation" mode displayed as soon as the
buffer needs heat and the log boiler is unable to
provide it. Then the control system starts the TWIN
burner to supply heat to the buffer. The current
status of the TWIN burner is shown in the [TWIN]
FUB.
If the log boiler's insulation door is open for more
than 1 minute, the TWIN burner is automatically