the profits made by the ECB on the Greek bonds it purchased during the crisis, are distributed to the National Central banks that are members of the ECB and then are transferred to the Member States. It is therefore for euro area governments to decide when to transfer the money to Athens.
The Eurogroup clarified on 20 February that only a successful conclusion of the review will permit this transfer. There has been speculation that the Greek government might not pay the next instalment to the IMF. What would the consequences of such a move be? You are right to ask about consequences.