Objective/Method/Outcome
Objective: Determines if the return air temperature is faulty.
Method: Checks if the sensor is faulty by monitoring the changes in the value of the sensor or if the temperature is out of range for more than the acceptable amount of time
Outcome: Triggers an insight when it determines the sensor is faulty.
Applicable System
RAF
Description
Sensor validation rule: Check for unreliable readings in range and quality. This rule is part of the CopperTree Standard rule-set.
Diagnosis
- Verify sensor exists.
- Verify sensor has power.
- Verify reading in BMS.
- Replace if the sensor is broken.
Message
The return temperature sensor is reading outside reasonable range or is stuck on one value. This may negatively impact comfort or energy efficiency.
Rule Template
Insight Type: Fault Detection
Trigger Type: Active High
Defualt Priority
Low
Logic
Inputs
| Input | Unit | Tags | Description |
|---|---|---|---|
| Return Air Temperature | °C/ °F | Return Air Temperature | The recorded Return Air temperature |
| Temperature Low Limit | °C/ °F | The predetermined low limit for temperature | |
| Temperature High Limit | °C/ °F | The predetermined high limit of temperature | |
| Weekly Insight Threshold | hours | This is the minimum number of hours the system should be at fault to trigger insight |
Notes
Default Thresholds:
- Temperature Low Limit [°C]: 0°C or 32°F
- Temperature High Limit [°C]: 40°C or 100°F
- Weekly Insight Threshold [hours]: 120 hours
