On this page, you can see the status of the sensors.
Green means the sensor is working correctly (1).
Yellow for star shaft means the roller has clogged. It is likely that a stone has blocked the star shaft.
Yellow for oil filter means the oil filter is clogged. The oil filter should be replaced. Check instructions (2)
Red means the value from sensor is out of range, or the sensor cable or sensor has been damaged (3)**
A Red Cross means sensor has disconnected. Check the cables and connector. (4)