Based on the description, both kinds of devices are, in general terms, out of scope of Regulation (EU) 2015/1094 and Regulation (EU) 2015/1095. More in detail, trolley chambers used to preserve and to re-thermalize foodstuffs are out of scope as long as they fall into the scope exclusion laid down in Article 1.1.e of Regulation (EU) 2015/10956 ('cabinets specifically designed only for the purpose of thawing frozen foodstuffs in a controlled manner, where the mere presence of one compartment specifically designed for thawing frozen foodstuffs in a controlled manner is not sufficient for exemption').
Concerning trolley chambers which refrigerate foodstuffs only for a limited time, this product does not meet the definition of professional refrigerated storage cabinets, as from Regulation (EU) 2015/1095, article 2.1.a7 ('‘professional refrigerated storage cabinet’ means an insulated refrigerating appliance…, capable of continuously maintaining the temperature of foodstuffs within prescribed limits').
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.