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Design of a steady-state detector for fault detection and diagnosis of a residential air conditioner



Minsung Kim, Seok H. Yoon, Piotr A. Domanski, William V. Payne


This paper presents a general methodology for developing a steady-state detector for a vapor compression system based on a moving window and using standard deviations of seven measurements selected as features. The feature thresholds and optimized moving window size were based upon steady-state no-fault tests and startup transient tests. The study showed that evaporator superheat and condenser subcooling were sufficient for determining the onset of steady-state during the startup transient. However, they misidentified steadystate during indoor temperature change tests where evaporator saturation temperature and air temperature change across the evaporator were needed for proper steady-state identification. Hence, the paper recommends including all fault detection and diagnosis (FDD) features in the steady-state detector to ensure the robustness of the detector because different features may play key roles with different transients.
International Journal of Refrigeration
No. 5


detection, steady state, air conditioning, residential buildings, compressing, tests, methodology, windows, fault trees, refrigerants


Kim, M. , Yoon, S. , Domanski, P. and Payne, W. (2008), Design of a steady-state detector for fault detection and diagnosis of a residential air conditioner, International Journal of Refrigeration, [online], (Accessed June 13, 2024)


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Created April 30, 2008, Updated October 12, 2021