Objective/Method/Outcome
Objective: Determines if the Discharge Air Temperature sensor 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
DAT
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 sensor is broken.
Message
The discharge temperature sensor is reading outside reasonable range or is stuck on one value. This may negatively impact comfort or energy efficiency.
Rule Template
Insight Template: Fault Detection
Trigger Type: Active High
Default Priority
Low
Logic
Inputs
| Input | Unit | Tags | Description |
|---|---|---|---|
| Discharge Air Temperature | °C/ °F | Discharge Air Temperature | Discharge air temperature records |
| 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 | Hr | 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]: 50°C or 120°F
- Weekly Insight Threshold [hours]: 120 hours
