Lighting Control System Fault Detection and Diagnostic

This article is about general and Fault Detection and Diagnostic for Lighting Control System used in Integrated Automation System or Building Automation System.

Lighting Control System Fault Detection and Diagnostic

1. Bad Energy Data

   1. Description:
      • Find periods for at least a duration when data contains values outside of low and high limits or the data is shown as “not a number” (NaN). Fault dependencies and associated scenarios include the following;
      • All data will be imported into the SCMS ‘as is’ from its existing system.
   2. Requirements
      • Consumption or Demand Point: Any point that has consumption or demand type units

2. Double Dipping Data

   1. Description
      • Finds periods for at least a duration when a point’s history contains two or more data points within a leeway of an interval. Fault dependencies and associated scenarios include the following;
      • All data will be imported into the SCMS ‘as is’ from its existing system.
   2. Requirements
      • Consumption or Demand Point: Any point that has consumption or demand type units

3. Lights Running During Unoccupied Hours

   1. Description:
      • Generates a fault when lights are running during unoccupied hours and an associated occupancy sensor has not detected motion therein. Fault dependencies and associated scenarios include the following;
      • Periods are only found when the local occupancy sensor has not detected motion for a defined length of time.
      • The lighting is scheduled to remain off.
   2. Requirements:
      • Interior Lighting: This rule is applied to only interior lighting
      • Lighting Schedule: Occupied/Unoccupied
      • Light(s) Status or Light(s) Command: Light(s) on/off status
      • Lighting Level: Measured via Multi-Sensor
      • Occupancy Sensor Status: Motion Detected/Not Detected.
      • Occupancy Sensor Timer: 30 Mins (Adj.)

4. Lights Not Running During Occupied Hours

   1. Description:
      • Generates a fault when lights are not running during occupied hours and an associated occupancy sensor has detected motion therein. Fault dependencies and associated scenarios include the following;
      • Periods are only found when the local occupancy sensor has detected motion for a defined length of time.
      • The lighting is scheduled to remain on.
   2. Requirements:
      • Interior Lighting: This rule is applied to only interior lighting
      • Lighting Schedule: Occupied/Unoccupied
      • Light(s) Status or Light(s) Command: Light(s) on/off status
      • Lighting Level: Measured via Multi-Sensor
      • Occupancy Sensor Status: Motion Detected/Not Detected.

5. Lights Not Dimming During Daylight Harvesting

   1. Description:
      • Finds periods when the lighting level exceeds the zone setpoint(s) by a threshold for a longer than a duration. Fault dependencies and associated scenarios include the following;
      • Periods are only found when the daylight multi sensor initiates light harvesting.
      • The lighting is scheduled to remain on.
   2. Requirements:
      • Interior Lighting: This rule is applied to only interior lighting
      • Light(s) Status or Light(s) Command: Light(s) on/off status
      • Lighting Level: Measured via Multi-Sensor
      • Lighting Level Dimming Status: Dimming status (%)
      • Lighting Schedule: Occupied/Unoccupied

6. Missing Data

   1. Description
      • Finds periods for at least a duration when a record’s history contains zero data points within a leeway of an interval. Fault dependencies and associated scenarios include the following;
      • All data will be imported into the SCMS ‘as is’ from its existing system.
   2. Requirements
      • Consumption or Demand Point: Any point that has consumption or demand type units

7. Sensor Failure

   1. Description:
      • Finds periods over a duration when a sensor does not change by a threshold for a 24-hour period and equipment is running.
   2. Requirements:
      • Sensor: Any numerical data point from occupancy sensors, daylight sensors and fixture ballasts.