The Football Association charged Thomas Frank with improper conduct after he was sent off in the home loss to Wolves.
After the final whistle of the game, the Danes were shown a second yellow card for remonstrating with the referee.
He was booked for a confrontation with a Wolves player.
The FA charge alleges that Frank's "language and/or behaviour towards the referee" was "improper".
Frank admitted in his post match interview that he had done something wrong.
Frank said he would put his hands up. It was stupid of me to tell my players to keep their emotions in check and not get stupid cards.
The first yellow was for confronting a Wolves player and then I turned around and the referee said it was too aggressive.