For Perfect Moose Greg

Make sure the connected espresso machine is switched on.

Make sure the steam boiler of the connected espresso machine is fully heated.

Make sure the steam valve is fully open. 

For Perfect Moose Jack

Check whether the blue display on the boiler at the back is illuminated and indicates > 125 degrees.

Yes? Make sure the steam valve at the back of the device is fully open (the blue tap should be in a vertical position). 

No? This means the boiler is not yet fully filled with water. 

=> Close the steam valve at the back of the device (to close, put the blue tap in a horizontal position) -> restart the device -> start the boiler refresh procedure (starting at step 4).