TRANSPORT REFRIGERATION SYSTEMS

A method of controlling a transport refrigeration system 1, wherein the transport refrigeration system comprises a refrigeration unit 7 comprising a compressor 8, and a refrigerated compartment 6 operably coupled to the refrigeration unit 7, and wherein the transport refrigeration system is operable in a standby mode in which the transport refrigeration system 1 is connected to and powered by a mains power source 2, the method comprising: providing a first compressor speed, wherein the first compressor speed is less than a maximum speed of the compressor 8 of the refrigeration unit 7; determining when the transport refrigeration system 1 is being operated in the standby mode; determining whether a current time is within a first time period; and when it is determined that the transport refrigeration system 1 is being operated in the standby mode, and when it is determined that the current time is within the first time period: operating the compressor 8 of the refrigeration unit 7 in accordance with the first compressor speed.