Refer to the code description of the manual referring to the
code of the alarm condition.
On / off button while holding down the boiler's self-control
switches off the boiler if the error corrected the boiler goes
into shutdown. Alarm continues the error continues.
In case of extreme temperatures you expect to take the
boiler to cool off position. Then make a fire again.
Reduce water pressure by freeing the installation under 2
bars.
Fill the fuel tank.