When I turn the machine on while holding the steam and espresso buttins, it is supposed to turn on the programming mosde. When I do this, the central unit warning light comes on. It does not say anything in the manual about this or any other status for the machine to be in programming mode. I am trying to decalcify the machine. Even with the light on I try to open up the steam to run the solution through the machine. It very slowly moves water through and out of the steam. Is this correct or do I have a problem? I have removed the central unit and replaced it and nothing diff happens but in normal mode I can still make coffee. Thank you.