An HVAC controller that monitors the performance of an HVAC system during its operating by comparing a monitored parameter value (e.g. delta T) to a pre-determined limit stored in the HVAC controller memory in order to determine if a performance limit has been violated. In some cases, the HVAC contr
An HVAC controller that monitors the performance of an HVAC system during its operating by comparing a monitored parameter value (e.g. delta T) to a pre-determined limit stored in the HVAC controller memory in order to determine if a performance limit has been violated. In some cases, the HVAC controller may display on a display of the HVAC controller a user alert for at least some of the detected violations. In some instances, the HVAC controller may display or otherwise provide a user alert only after a pre-determined number of performance violations are detected by the HVAC controller. Alternatively, or in addition, the HVAC controller may accept one or more conditions that indicate when a user alert for a detected violation is not to be displayed on the display of the HVAC controller.
대표청구항▼
1. An HVAC controller configured to control one or more components of an HVAC system, the HVAC controller comprising: a housing;a user interface including a display;a memory;an I/O block for receiving one or more signals from the HVAC system and for providing one or more control signals to the HVAC
1. An HVAC controller configured to control one or more components of an HVAC system, the HVAC controller comprising: a housing;a user interface including a display;a memory;an I/O block for receiving one or more signals from the HVAC system and for providing one or more control signals to the HVAC system; anda controller coupled to the memory, the user interface and the I/O block, wherein the display, the memory, the I/O block and the controller are housed within the housing, the controller programmed to accept a sensitivity factor via the user interface, wherein the sensitivity factor represents a sensitivity of the controller in detecting and/or in alerting delta T faults, the controller further programmed to monitor one or more signals received via the I/O block to determine if a delta T limit of the HVAC system has been violated, indicating a delta T fault, the controller is further programmed to display on the display of the HVAC controller a user alert only after a number of delta T faults are determined by the controller, wherein the number of delta T faults is identified based on the sensitivity factor. 2. The HVAC controller according to claim 1, wherein the controller is configured to record one or more of the delta T faults in the memory. 3. The HVAC controller according to claim 1, wherein the controller is configured to display a user alert on the display only after a pre-determined number of delta T faults are detected by the controller. 4. The HVAC controller according to claim 1, wherein the controller is further programmed to accept via the user interface a condition that indicates when a user alert for a detected delta T fault is not to be displayed on the display of the HVAC system. 5. The HVAC controller according to claim 4, wherein the condition relates to an indoor air temperature. 6. The HVAC controller according to claim 4, wherein the condition relates to an indoor humidity level. 7. The HVAC controller according to claim 4, wherein the condition relates to an outdoor temperature. 8. The HVAC controller according to claim 4, wherein the condition relates to a call for humidification. 9. The HVAC controller according to claim 4, wherein the condition relates to a utility load shutoff event. 10. The HVAC controller according to claim 4, wherein the condition relates to a defrost cycle. 11. The HVAC controller according to claim 4, wherein the controller is programmed to accept via the user interface a first condition and a second condition, wherein the first condition indicates when a user alert for a detected delta T fault for a heating stage of the HVAC system is not to be displayed on the display of the HVAC system, and the second condition indicates when a user alert for a detected delta T fault for a cooling stage of the HVAC system is not to be displayed on the display of the HVAC system, wherein the first condition is independent of the second condition. 12. An HVAC controller configured to control one or more components of an HVAC system, the HVAC system comprising a heating stage and/or a cooling stage, the HVAC controller comprising: a housing;a user interface including a display;a memory;an I/O block for receiving one or more signals from the HVAC system and for providing one or more control signals to the HVAC system; anda controller coupled to the memory, the user interface and the I/O block, wherein the display, the memory, the I/O block and the controller are housed within the housing, the controller programmed to accept a sensitivity factor via the user interface, wherein the sensitivity factor represents a sensitivity of the controller in detecting and/or in alerting delta T faults, the controller further programmed to monitor one or more signals received via the I/O block to determine if a delta T limit of the HVAC system has been violated indicating a delta T fault, the controller is further programmed to display a user alert on the display only after a number of delta T faults are determined by the controller, wherein the number of delta T faults is identified based on the sensitivity factor, the controller is further programmed to query a user via the user interface for one or more conditions for the heating stage and/or cooling stage that specify when a detected delta T fault is not to be displayed on the display of the HVAC system. 13. The HVAC controller according to claim 12, wherein the controller is programmed to query the user via the user interface for one or more conditions that specify when a detected delta T fault is not to be displayed on the display of the HVAC system for each heating stage of the HVAC system. 14. The HVAC controller according to claim 12, wherein the controller is programmed to query the user via the user interface for one or more conditions that specify when a detected delta T fault is not to be displayed on the display of the HVAC system for each cooling stage of the HVAC system. 15. The HVAC controller according to claim 12, wherein the controller is programmed to query the user via the user interface for one or more conditions that specify when a detected delta T fault is not to be displayed on the display of the HVAC system for the heating stage of the HVAC system, and to query the user via the user interface for one or more conditions that specify when a detected delta T fault is not to be displayed on the display of the HVAC system for the cooling stage of the HVAC system. 16. The HVAC controller according to claim 12, wherein the controller is programmed to query the user via the user interface for a user specified delta T limit. 17. The HVAC controller a according to claim 16, wherein the controller is programmed to perform a diagnostic test to determine a current delta T value for the HVAC system upon receiving a run test request via the user interface. 18. The HVAC controller a according to claim 17, wherein the controller is programmed to display the current delta T value on the display when the controller queries the user for the user specified delta T limit. 19. A method of monitoring a performance of an HVAC system including one or more HVAC components that are controlled, at least in part, by an HVAC controller having a user interface including a display, a memory, and a controller, the HVAC system including a heating stage and/or a cooling stage, the method comprising: accepting at least one user specified delta T limit via the user interface of the HVAC controller;accepting a sensitivity factor via the user interface of the HVAC controller, wherein the sensitivity factor represents a sensitivity of the HVAC controller in detecting and/or in alerting delta T faults;the controller receiving an indication of a current delta T value for the HVAC system;the controller determining a delta T fault for the HVAC system based, at least in part, on the received current delta T value and the at least one user specified delta T limit; andthe controller displaying a user alert on the display only after a number of delta T faults are determined by the controller and recorded in the memory, wherein the number of delta T faults is identified based on the sensitivity factor; andwherein the HVAC controller is configured to accept one or more conditions for the heating stage and/or cooling stage that indicate when the user alert is not to be displayed on the display. 20. The method according to claim 19, wherein the one or more conditions are accepted via the user interface of the HVAC controller. 21. The method according to claim 19, wherein the one or more conditions are specific conditions under which one or more of the delta T faults are to be ignored.
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