Failure Diagnosis System for Absorption Chiller/Heater

Recently, the absorption chiller/heater is attracting interest because it delivers airconditioning without using fluorocarbons. Practically, it requires periodical or non-periodical maintenance. It is difficult to detect failures except in summertime with large refrigerant load and, moreover, human expertise is needed for discrimination of their origin. This paper reports on a system that automatically predicts the possibility of failures and discriminates their origins, regardless of the driving situation.