This can have various causes:
1. possibly no limit values have been set yet. Please refer to the operating instructions of your device.
2. the sensor cable of the light sensor has been bent too much. Solution: In this case you have to replace the sensor.
3. the light sensor is influenced by shadowing (e.g. bushes). Solution: Eliminate the cause of the shadow formation. 2.
4. a time-controlled or manual move command occurred when the sun control was active. The sun control is aborted and restarted. The further sequence then depends on the sun condition.
Solution: Observe the status of the sun symbol in the display. It must flash when the sun program is active. If the sensor detects sun for 10 minutes without interruption, the roller shutter lowers until its shadow covers the light sensor.