Gullibell
I just grabbed the EGPWS manual from our technical library...it helps when trying to understand something like this to have the book to refer to. Here is what it says:
Was it a generic EGPWS manual or the S92A flight manual that you grabbed?
The only reason I ask is because what you describe does not sound like the EGPWS as configured in the S92A. I have been searching for the EGPWS windscreen rain removal mode for years now without success.
As you say "it helps when trying to understand................"
After 50+ posts on this topic you are becoming a bit like white noise now.