Abstract: In order to improve a method for selecting a frequency converter for a refrigerant compressor unit comprising a refrigerant compressor and an electric drive motor in such a way that the frequency converter is optimised for the application in question, it is proposed that a working state suitable for the operation of the refrigerant compressor unit is selected in an application field of an application diagram of the refrigerant compressor, that an operating frequency is selected for this selected working state, and that, on the basis of drive data, a working state operating current value corresponding to the selected working state and the selected operating frequency is ascertained for the operation of the refrigerant compressor unit.

Abstract: In order to provide a control unit which can cooperate with a great variety of operating units and/or status acquisition units, it is proposed that the control unit comprises a base module which has at least one processor and at least one memory store for the required program code for operating the processor and terminals for operating units carrying out basic functions and/or status acquisition units and that the processor and the program code stored in the memory store are configured such that therewith additional functions of an additional module connectable to the base module are also executable.

Abstract: In order to improve a method for selecting a frequency converter for a refrigerant compressor unit comprising a refrigerant compressor and an electric drive motor in such a way that the frequency converter is optimised for the application in question, it is proposed that a working state suitable for the operation of the refrigerant compressor unit is selected in an application field of an application diagram of the refrigerant compressor, that an operating frequency is selected for this selected working state, and that, on the basis of drive data, a working state operating current value corresponding to the selected working state and the selected operating frequency is ascertained for the operation of the refrigerant compressor unit.

Abstract: In order to improve a method for selecting a frequency converter for a refrigerant compressor unit comprising a refrigerant compressor and an electric drive motor in such a way that the frequency converter is optimised for the application in question, it is proposed that a working state suitable for the operation of the refrigerant compressor unit is selected in an application field of an application diagram of the refrigerant compressor, that an operating frequency is selected for this selected working state, and that, on the basis of drive data, a working state operating current value corresponding to the selected working state and the selected operating frequency is ascertained for the operation of the refrigerant compressor unit.

Abstract: In order to improve a method for operating status determination of a refrigerant compressor/expander comprising a compressor unit and a drive unit such that information on the operating status of a refrigerant compressor/expander which is as reliable as possible can be obtained, it is proposed that, for at least one bearing of the refrigerant compressor/expander, a load value resulting from an operation of said refrigerant compressor/expander and a speed value are determined and in that, on the basis of the speed value and the load value and also at least one operating parameter, there is determined for the at least one bearing an operating prediction value for a future maintenance-free operation of the refrigerant compressor/expander.

Abstract: In order to an initialising system for a refrigerant compressor unit, including a refrigerant compressor, an electrical drive motor for the refrigerant compressor and a compressor controller that determines the voltage and speed of the drive motor on the basis of sets of configuration parameters loaded into this compressor controller and controls the drive motor accordingly, wherein the initialising system has a compressor data memory, in which compressor data relating to respectively possible refrigerant compressors are stored, and a motor data memory, in which motor data relating to possible drive motors are stored, wherein the initialising system has a processor for performing the initialisation, a display unit and an input unit, wherein during initialisation the display unit and the input unit serve to determine the refrigerant compressor and the drive motor, and wherein the processor uses the compressor data of the determined refrigerant compressor and uses the motor data of the determined drive motor to

Abstract: In order to improve a method for selecting a frequency converter for a refrigerant compressor unit that includes a refrigerant compressor and an electric drive motor such that the frequency converter is selected in a manner for optimized use, it is proposed that a working state suitable for operation of the refrigerant compressor unit should be selected within an application field of an application graph of the refrigerant compressor, that an operating frequency for this selected working state should be selected, and that a working state operating current value that corresponds to the selected working state and the selected operating frequency should be determined from drive data, for operation of the refrigerant compressor unit.

Abstract: In order to improve a method for selecting a frequency converter for a refrigerant compressor unit comprising a refrigerant compressor and an electric drive motor in such a way that the frequency converter is optimised for the application in question, it is proposed that a working state suitable for the operation of the refrigerant compressor unit is selected in an application field of an application diagram of the refrigerant compressor, that an operating frequency is selected for this selected working state, and that, on the basis of drive data, a working state operating current value corresponding to the selected working state and the selected operating frequency is ascertained for the operation of the refrigerant compressor unit

Abstract: In order to improve a method for selecting a frequency converter for a refrigerant compressor unit that includes a refrigerant compressor and an electric drive motor such that the frequency converter is selected in a manner for optimized use, it is proposed that a working state suitable for operation of the refrigerant compressor unit should be selected within an application field of an application graph of the refrigerant compressor, that an operating frequency for this selected working state should be selected, and that a working state operating current value that corresponds to the selected working state and the selected operating frequency should be determined from drive data, for operation of the refrigerant compressor unit.

Abstract: In order to an initialising system for a refrigerant compressor unit, including a refrigerant compressor, an electrical drive motor for the refrigerant compressor and a compressor controller that determines the voltage and speed of the drive motor on the basis of sets of configuration parameters loaded into this compressor controller and controls the drive motor accordingly, wherein the initialising system has a compressor data memory, in which compressor data relating to respectively possible refrigerant compressors are stored, and a motor data memory, in which motor data relating to possible drive motors are stored, wherein the initialising system has a processor for performing the initialisation, a display unit and an input unit, wherein during initialisation the display unit and the input unit serve to determine the refrigerant compressor and the drive motor, and wherein the processor uses the compressor data of the determined refrigerant compressor and uses the motor data of the determined drive motor to