06223544 is referenced by 146 patents and cites 4 patents.

Fault detection is implemented on a finite state machine controller for an air handling system. The method employs data, regarding the system performance in the current state and upon a transition occurring, to determine whether a fault condition exists. The fault detection may be based on saturation of the system control or on a comparison of actual performance to a mathematical model of the air handling system. As a consequence, the control does not have to be in steady-state operation to perform fault detection.

Title
Integrated control and fault detection of HVAC equipment
Application Number
9/368972
Publication Number
6223544 (B1)
Application Date
August 5, 1999
Publication Date
May 1, 2001
Inventor
John E Seem
Glendale
WI, US
Agent
Quarles & Brady
US
Agent
George E Haas
US
Assignee
Johnson Controls Technology Co
MI, US
IPC
F25B 49/02
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