Predictive diagnostics system with fault detector for preventative maintenance of connected equipment

1. A building management system comprising:

connected equipment configured to measure a plurality of monitored variables; and

a predictive diagnostics system configured to:

receive the plurality of monitored variables from the connected equipment;

generate a probability distribution of the plurality of monitored variables;

determine a boundary for the probability distribution using a supervised machine learning technique to separate normal conditions from faulty conditions indicated by the plurality of monitored variables;

separate the faulty conditions into sub-patterns using an unsupervised machine learning technique to generate a fault prediction model, wherein each sub-pattern corresponds with a fault, and wherein each fault is associated with a fault diagnosis;

receive a current set of the plurality of monitored variables from the connected equipment;

determine whether the current set of the plurality of monitored variables corresponds with one of the sub-patterns of the fault prediction model to facilitate predicting whether a corresponding fault will occur; and

determine the fault diagnosis associated with a predicted fault to facilitate taking preventative measures.

2. The building management system of claim 1 , wherein the predictive diagnostics system is configured to provide an indication of the fault diagnosis with a recommended action to facilitate manual repair of the connected equipment based on the fault diagnosis to prevent the predicted fault from occurring.

3. The building management system of claim 1 , wherein the predictive diagnostics system is configured to perform an automated control action based on the fault diagnosis to at least one of (i) prevent the predicted fault from occurring or (ii) compensate for the predicted fault.

4. The building management system of claim 3 , wherein the automated control action includes at least one of (i) entering the connected equipment into a safety mode, (ii) operating the connected equipment at a derated state, or (iii) shutting down the connected equipment.

5. The building management system of claim 3 , wherein the connected equipment includes an array of equipment, and wherein the automated control action includes (i) at least one of (a) shutting down or (b) derating operation of at least one of the connected equipment within the array of equipment that is associated with the predicted fault and (ii) increasing operation of the remaining connected equipment within the array of equipment.

6. The building management system of claim 3 , wherein the automated control action includes increasing an output of the connected equipment to preemptively compensate for an expected decrease in performance in the future based on the predicted fault.

7. The building management system of claim 1 , wherein the predictive diagnostics system is configured to receive an indication of the fault diagnosis for an unprecedented fault in response to the unprecedented fault not corresponding with one of the sub-patterns of the fault prediction model.

8. The building management system of claim 7 , wherein the predictive diagnostics system is configured to define a new sub-pattern of the fault prediction model based on the unprecedented fault.

9. A method for performing predictive diagnostics on connected equipment of a building management system, the method comprising:

connecting a processing circuit of the building management system to the connected equipment, the connected equipment including one or more sensors positioned to acquire data regarding a plurality of monitored variables indicative of operation of the connected equipment;

receiving, by the processing circuit, the plurality of monitored variables;

generating, by the processing circuit, a probability distribution of the plurality of monitored variables;

determining, by the processing circuit, a boundary for the probability distribution to separate normal conditions from faulty conditions indicated by the plurality of monitored variables;

separating, by the processing circuit, the faulty conditions into sub-patterns to generate a fault prediction model, wherein each sub-pattern corresponds with a fault, and wherein each fault is associated with a fault diagnosis;

receiving, by the processing circuit, a current set of the plurality of monitored variables from the connected equipment;

determining, by the processing circuit, whether the current set of the plurality of monitored variables corresponds with one of the sub-patterns of the fault prediction model to facilitate predicting whether a corresponding fault will occur;

determining, by the processing circuit, the fault diagnosis associated with a predicted fault based on which of the sub-patterns of the fault prediction model the current set of the plurality of monitored variables corresponds with; and

at least one of:

providing, by the processing circuit to an output device, an indication of the fault diagnosis with a recommended action to facilitate manual repair of the connected equipment by an operator based on the fault diagnosis to prevent the predicted fault; or

performing, by the processing circuit, an automated control action based on the fault diagnosis to at least one of prevent or compensate for the predicted fault.

10. The method of claim 9 , wherein the automated control action includes at least one of (i) entering the connected equipment into a safety mode, (ii) operating the connected equipment at a derated state, or (iii) shutting down the connected equipment.

11. The method of claim 9 , wherein the connected equipment includes an array of equipment, and wherein the automated control action includes (i) at least one of (a) shutting down or (b) derating operation of at least one of the connected equipment within the array of equipment associated with the predicted fault and (ii) increasing operation of the remaining connected equipment within the array of equipment.

12. The method of claim 9 , wherein the automated control action includes increasing an output of the connected equipment to preemptively compensate for an expected decrease in performance in the future based on the predicted fault.

13. The method of claim 9 , further comprising receiving, by the processing circuit from an input device, an indication of the fault diagnosis for an unprecedented fault in response to the unprecedented fault not corresponding with one of the sub-patterns of the fault prediction model, wherein the input device is or is not the same device as the output device.

14. The method of claim 13 , further comprising defining, by the processing circuit, a new sub-pattern of the fault prediction model based on the unprecedented fault.

15. A building management system for a building, the building management system comprising:

building subsystems including at least one of a heating, ventilation, and air conditioning (HVAC) system, a lighting system, or a security system; and

a controller coupled to the building subsystems, the controller configured to:

receive room usage data regarding use of a respective room of the building by a respective occupant, the room usage data including information regarding an identity of the respective occupant and at least one of a temperature setpoint, a light level, an occupancy count, a time of a day, or the day of a week;

determine usage patterns in the room usage data using unsupervised machine learning;

generate a user profile for the respective occupant based on the usage patterns, the user profile including autonomously generated preferences for the respective room and the respective occupant; and

control the building subsystems based on the user profile.

16. The building management system of claim 15 , wherein the controller is a smart thermostat that is positionable in the respective room.

17. The building management system of claim 15 , wherein the controller is configured to:

receive the room usage data regarding a plurality of rooms within the building, wherein the room usage data includes a room ID for each room of the plurality of rooms;

segregate and aggregate the room usage data by room based on the room ID associated therewith;

determine the usage patterns in each of the plurality of rooms; and

control the building subsystems based on the user profile for each of the plurality of rooms individually.

18. The building management system of claim 15 , wherein the controller is configured to generate the user profile absent manual operator intervention.

19. The building management system of claim 15 , wherein the controller is configured to:

identify a current time; and

control the building subsystems according to the user profile and based on the current time.

20. The building management system of claim 15 , wherein the controller is configured to at least one of:

allow the respective occupant to view the user profile and modify one or more of the autonomously generated preferences; or

control the building subsystems based on the user profile in response to the respective occupant being detected within the respective room.