It is also possible that the following notification appears (not an eror for boiler):
Fehler in Parametern (Greška u parametrima) / Error in parameters
The following errors are written only in the memory of regulation and do not show up on the
screen Ignition (Power ON)
Error memory has been initialized
Error example
Resetting the errors
You can annul the errors by pressing the QUIT key.
Before that you need to check the cause of the error and try to remove it. If it is not possible, call an
authorized service center.
To reset the error, press QUIT. (SET button)