Fault Detection In Buildings

A method of detecting faults in a structure having a data network connecting a first actuator, a first sensor, and a second sensor, the method comprising:

• obtaining via the data network from the first actuator a first signal indicative of a test operating mode and from the first sensor and the second sensor respective signals indicative of a time series of test readings;
• producing a test operating mode in response;
• searching for the test operating mode in a first list, and searching for the first sensor and the second sensor in a second list;
• if the test operation mode is found in the first list and the first sensor and the second sensor are found in the second list, determining a test numerical measure between the first time series of test values and the second time series of test values, the test numerical measure including a predefined constant when the first time series of test values matches the second time series of test values and otherwise deviating from the predefined constant;
• and
• determining a test of the test numerical deviation measure from the predefined constant, and if the test deviation exceeds a test threshold value:
• producing fault data based on the test deviation and using the fault data to alert a user.