34 | Troubleshooting
6 720 644 144 (2010/09)
7Troubleshooting
All safety, modulation and control components are monitored by
the Heatronic system.
If a fault occurs during operation, a warning tone sounds.
The display indicates a fault (e. g. ) and the reset-button may
also flash.
If the reset button flashes:
B Press and hold the reset button until the display shows .
The appliance will start up again and the flow temperature will
be displayed.
If the reset button does not flash:
B Switch the appliance off and then on again at the main switch.
The appliance will start up again and the central heating flow
temperature will be displayed.
If the fault persists:
B Contact your authorised contractor or customer service for
assistance, providing details of the fault and the appliance.
If you press a button, the warning tone stops.
An overview of the display indications can be found
on page 29.
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