I brought the Ice Crystal Icing point up as on my type (plastic) said checklist asks for the EEC's to be put to alternate in that situation.
Then when you exit the condition, it asks you to return the EEC's to normal, which kinda answers the OP's original question. However, I don't fly the 777 (although my type is very similar!) hence my question to see if a similar situation arose in the 777 QRH/ECL...