The QR-Code gives access to information on the specific model, as registered in the EPREL database by the supplier. The EPREL database includes the mandatory information requested by the the various Energy Labelling regulations.
More info here.
Disclaimer: Please note that the European Commission cannot provide a legally binding interpretation of the EU legislation, as this is the sole competence of the European Court of Justice. Any remarks from the European Commission services are without prejudice to the position the Commission might take should related cases arise in a procedure before the Court of Justice.