Quote:
Originally Posted by
A33Zab
The figure explains the function 
of switch and logic
Thank you !!! I like to see finally inside of inside !
It proves Airbus is K.I.S.S.!
The switch needs only to be touched to ON in de-icing like PJ2 stated and if dual or all PITOT HEAT FAIL message is shown.
Temperature control is reactive rather than proactive
Uhhh...isn't that what is inherent to feedback controls? You need a certain deviation to correct the situation.
(we are awaiting RR_NDB
Transient in Feedback Systems (II))
Proactive......than you call it predictive! or not?
if any possible UAS is predictive, wouldn't it be better to DONT GO THERE?
I don't have the pitot internals by hand but the low heat (ground) setting is to protect the A/C skin when less cooling is available.