Key
Designation
Function
13
Operating modes
The red luminous figure indicates the currently active
operating mode.
14
Temperature indicator
The red luminous figures indicate the current boiler
temperature.
15
Temperature query
With this key the 5 indicated temperatures can be viewed
sequentially. The dot behind the individual figure indicates
that the value now relates to the individual temperature and
not the operating mode.
16
STOP key
a) To stop the heat-up phase (operating mode 1) if the
loading door was opened when the boiler did not
have to be heated up. This eliminates the need for
the fan to operate unnecessarily for 30 minutes.
b) If the loading door is opened during burnout, glow-
ing ember preservation or residual heat utilisation
modes (i.e. during operating mode 4, 5 or 6), the boi-
ler automatically switches over to operating mode 1
(heat-up phase) after closing the door. If, however,
no additional wood had been loaded, then it is pos-
sible to return to the original operating mode (i.e. 4,
5 or 6) by pressing the Stop key.
17
Chimney sweep key
Executes the emission measurement function. This
function should only be used by the heating engineer!
18
Plus / Minus key
For adjusting the parameters.
The Plus key is also used to cancel error messages.
This function should only be used by the heating engi-
neer!
19
Boiler safety temperature
limiter unlocking
If the fan unit was turned off as a result of excessive
boiler temperature (> 100ºC) and is now locked out to
prevent automatic start-up, use this key to unlock it.
Unlocking is possible once the boiler temperature has
dropped below 80ºC. The current boiler temperature is
shown on the display (e.g. 100ºC) and on the temper-
ature indicator field (14). Please contact your Hoval
Customer Service point if the boiler safety temperature
limiter keeps locking out.
20
Fuse
Check the 6.3 A fuse if the displays 11, 13 and 14 are
dark.
This should only be done by the heating engineer!
Heating system control
16
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