LED indicators

| LED | No. | Meaning | |
|---|---|---|---|
| RUN | A | on | Data transmission on the K-bus | 
| Bus | B | flashing | Activity: Data transfer on the DALI/DSI bus | 
| on | No power supply (24 VDC) for the power contacts | ||
| DALI / DSI | C | on | Operating mode: DALI mode | 
| off | Operating mode: DSI mode | ||
| Error | D | on | in DALI mode: Overload of the internal DALI power supply in DSI mode: DSI feedback |