Patent ID: 6629420
Filing Date: 2003-10-07
Classification: B60H,F25B

Abstract:
A method for testing and diagnosing air-conditioning apparatus on vehicles, said systems comprising a high pressure side with a condenser, a low pressure side with an evaporator through which cool air is created, said sides being respectively downstream and upstream of a compressor, comprising the steps of:measuring the pressure value HP on the high pressure side; measuring the pressure value LP on the low pressure side; measuring the environment temperature value Ta characterized in that it comprises the further steps of: measuring the temperature value Ti of the air coming from the evaporator; storing the values of the pressures (AP,BP) and of the temperatures (Ta and Ti) measured in a predetermined range of time (t) in a computing unit wherein a program of diagnosis is residing; running the program of diagnosis on the basis of the values stored and displaying messages of diagnosis responsive to the values measured.