The Portuguese was sent to the stands in his side's defeat by Aston Villa on Saturday after complaining about defender Vincent Sasso's red card.
Wednesday are sixth in the Championship, but have won just one of their last five games.
Carvalhal has not been given a touchline ban for the offence.
Sheffield Wednesday boss Carlos Carvalhal has admitted an improper conduct charge and has been fined £2,000 by the Football Association.