A method for coordinating operation between at least two groups of compressors in a cooling circuit, a first group of compressors forming part of a low temperature part of the cooling circuit and a second group of compressors forming part of a high temperature part of the cooling circuit, each of the compressor groups comprising one or more compressors, and each of the compressor groups comprising a controller, the controllers being capable of exchanging signals, the method comprising the following steps: - the LT compressor group needing one or more of the LT compressors to start operation, - investigating whether or not one or more of the MT compressors is/are operating, - in the case that one or more of the MT compressors is operating, allowing one or more of the LT compressors to start operation, - in the case that none of the MT compressors is operating: - establishing the suction pressure in the MT part of the cooling circuit, and comparing the suction pressure to a lower and an upper limit of a neutral pressure zone, said neutral pressure zone lying within an operating pressure zone of the MT part of the cooling circuit, and - operating the MT compressors and the LT compressors based on the comparing step, characterized in that the step of operating the MT compressors and the LT compressors comprises the steps of: - in the case that the suction pressure in the MT part of the cooling circuit is within the neutral pressure zone, starting at least one MT compressor and at least one LT compressor substantially simultaneously, - in the case that the suction pressure in the MT part of the cooling circuit is below the lower limit of the neutral pressure zone, starting at least one of the LT compressors, while preventing the MT compressors from starting, and - in the case that the suction pressure in the MT part of the cooling circuit is above the upper limit of the neutral pressure zone, starting at least one of the MT compressors, while preventing the LT compressors from starting. - the LT compressor group needing one or more of the LT compressors to start operation, - investigating whether or not one or more of the MT compressors is/are operating, - in the case that one or more of the MT compressors is operating, allowing one or more of the LT compressors to start operation, - in the case that none of the MT compressors is operating: - establishing the suction pressure in the MT part of the cooling circuit, and comparing the suction pressure to a lower and an upper limit of a neutral pressure zone, said neutral pressure zone lying within an operating pressure zone of the MT part of the cooling circuit, and - operating the MT compressors and the LT compressors based on the comparing step, - establishing the suction pressure in the MT part of the cooling circuit, and comparing the suction pressure to a lower and an upper limit of a neutral pressure zone, said neutral pressure zone lying within an operating pressure zone of the MT part of the cooling circuit, and - operating the MT compressors and the LT compressors based on the comparing step, - in the case that the suction pressure in the MT part of the cooling circuit is within the neutral pressure zone, starting at least one MT compressor and at least one LT compressor substantially simultaneously, - in the case that the suction pressure in the MT part of the cooling circuit is below the lower limit of the neutral pressure zone, starting at least one of the LT compressors, while preventing the MT compressors from starting, and - in the case that the suction pressure in the MT part of the cooling circuit is above the upper limit of the neutral pressure zone, starting at least one of the MT compressors, while preventing the LT compressors from starting.