SYSTEM AND METHOD FOR CALIBRATING PARAMETERS FOR A REFRIGERATION SYSTEM WITH A VARIABLE SPEED COMPRESSOR

A system and method for calibrating parameters for a refrigeration system having a variable speed compressor is provided. The system (5) comprises: a compressor (10) connected to a condenser (12) and an evaporator (16); an evaporator sensor (40) that outputs an evaporator signal corresponding to at least one of a sensed evaporator pressure and a sensed evaporator temperature; a discharge temperature sensor (28) that outputs a discharge temperature signal corresponding to a temperature of refrigerant exiting said compressor (10); an inverter drive (22) that modulates a frequency of electric power delivered to said compressor (10) to modulate a speed of said compressor (10); a control module (25) connected to said inverter drive (22) that determines a measured evaporator temperature based on said evaporator signal, that monitors electric power data and compressor speed data from said inverter drive (22), that calculates a derived evaporator temperature based on said electric power data, said compressor speed data, said discharge temperature signal, and compressor map data for said compressor (10), that compares said measured evaporator temperature with said derived evaporator temperature, and that selectively updates said compressor map data based on said comparison.