A. Kuitche , R. Ouambo , M. Edoun , Using of Fuzzy Logic in Technical Expertise of Refrigeration Installations of Cold Chambers, Journal of Engineering and Applied Sciences, Volume 2,Issue 6, 2007, Pages 997-1005, ISSN 1816-949x, jeasci.2007.997.1005, (https://makhillpublications.co/view-article.php?doi=jeasci.2007.997.1005) Abstract: In this research, we have presented a software for technical expertise of refrigeration installations of cold chambers. This software is developed on the base of fuzzy logic and intended for a general use, contrary to those implemented currently for specific installations, in the maintenance systems or those of remote monitoring. The expertise here is done in three stages: recalculation of the installations, internal diagnosis and decision-making. The objective of a general use have been achieved by the implementation of suitable techniques of artificial intelligence, in particular a genetic algorithm for the diagnosis and a fuzzy rules system for the decision-making. In addition, user libraries called FCC (Fluidic Circuit Configuration) allow the taking into account of various configurations of refrigerating installations. This software was developed for Windows and its evaluation on a cold store of 10000 m3 showed that it fulfils indeed its function. Keywords: Software;expertise;fuzzy logic;redimensioning;internal diagnosis;decision-making