The Brazilian winger was sent off in stoppage time by referee Ricardo de Burgos Bengoetxea for striking an opponent following a scuffle with Valencia players in which Vinicius Jr appeared to be grabbed around the neck.
Vinicius had earlier been racially abused by fans at the Mestalla Stadium, which led to the game being halted for 10 minutes as the player pointed out people who were abusing him in the stands.
"The RFEF Competition Committee considers that the referee's assessment was determined by the omission of the entirety of the play that took place, which affected the refereeing decision."
"The fact that he (the referee) was deprived of a decisive part of the facts led him to adopt an arbitrary decision. And this is because it was impossible for him to properly assess what happened."
Valencia get five-match partial stand closure
Valencia's south stand will be partially closed for five matches and the club fined 45,000 euros after the racist abuse suffered by Vinicius Jr in Sunday's game, the RFEF also said on Tuesday.
Seven people were detained by Spanish police earlier on Tuesday, accused of different hate crimes against Vinicius Jr, including racist slurs allegedly hurled at the Brazilian during Sunday's match at Valencia's Mestalla stadium.
The game was halted for 10 minutes as the Brazil forward pointed out fans who were abusing him. He was then involved in an altercation with Valencia's players which led to him being sent off in the second half.
"It is considered proven that there were racist shouts at Vinicius during the aforementioned match. A financial penalty of 45,000 euros is imposed on Valencia," the Competition Committee of the RFEF said in a statement.
Real Madrid manager Carlo Ancelotti said on Tuesday he expected the Brazilian forward to remain at the Spanish club despite facing racist abuse in several LaLiga matches.
Tuesday's arrests come a day after football federation chief Luis Rubiales said Spanish soccer has a racism problem.
