HVAC Fault Log Management with Threshold-Based Auto-Clearing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current HVAC system control technologies are time-consuming and costly to troubleshoot due to the complexity of managing multiple faults, particularly with legacy or mismatched devices, which can lead to inefficient operation and reduced system performance.
Innovation Solution
A control system with a microcontroller and storage device that monitors HVAC system conditions, stores faults, and clears them after a threshold time period, preventing communication with incompatible devices and improving system functionality by ensuring only compatible devices are communicated with.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple faults are stored and monitored in the HVAC system, then system reliability and fault detection capability are improved, but troubleshooting time and operational complexity increase
Solution Approach 1:
The patent segments fault management by categorizing faults into different types (hard faults, soft faults, communication faults) and implementing type-specific retention policies. This segmentation allows the system to efficiently manage multiple faults without overwhelming troubleshooting complexity, as each fault type can be handled with appropriate specialized procedures.
Solution Approach 2:
The system performs preliminary actions by automatically clearing communication faults after a threshold time period without requiring manual intervention. This preliminary clearing action reduces troubleshooting time for transient communication issues while maintaining reliability through automated monitoring and selective retention of persistent faults.
2Adaptability or versatility
If communication is maintained with all devices including legacy or mismatched devices, then system adaptability is improved, but system performance and operational efficiency deteriorate
Solution Approach 1:
The patent introduces an intermediary communication fault detection mechanism that mediates between legacy/mismatched devices and the main HVAC system. This intermediary layer identifies communication faults and triggers automated clearing procedures, allowing the system to maintain adaptability with various devices while protecting overall system efficiency through automated fault management.
Solution Approach 2:
The system changes the communication parameter state by implementing threshold-based time periods for fault retention. Communication faults that persist beyond the threshold are cleared automatically, while those within the threshold are retained for analysis. This dynamic parameter change allows the system to adapt to different device types while maintaining operational efficiency through automated decision-making.
3Loss of information
If fault retention time period is extended, then fault analysis capability is improved, but system responsiveness and clearing of transient faults deteriorate
Solution Approach 1:
The patent implements dynamic fault retention by using a threshold time period that automatically adjusts fault clearing behavior. Faults are retained for analysis during the threshold period, but automatically cleared if they persist beyond this dynamic threshold. This dynamic approach balances fault analysis capability with system responsiveness, allowing sufficient time for analysis while preventing permanent retention of transient faults.
Data Source
AI summary
A control system for a heating, ventilation, and/or air conditioning (HVAC) system includes control circuitry having a storage device and a microcontroller. The storage device is configured to store faults. The microcontroller is configured to monitor for a condition of the HVAC system associated with a fault, store a fault in the storage device when the condition is detected, identify whether a duration of time that the fault has been stored in the storage device exceeds a threshold time period, and clear the fault from the storage device when the duration exceeds the threshold time period.