always seeing "CLN" message
14 years 2 weeks ago #120
The manual covers this situation to some degree, but here is a little more clarification.
The CLN message - Clean message occurs when a sensor reports weak eye strength, basically the sensor is dirty and the seed sensor "eyes", which are the optical components that detect seed, are too dirty to operate effectively. Inoculant is the biggest culprit for causing CLN messages, especially peat based inoculants that get gummy and stick to the seeds (and hoses). Also be wary of any moisture inside the seed tubes, moisture mixes with fertilizer and can also cause CLN messages to occur rather quickly.
Before cleaning any sensors, make a note of the sensor(s) that are showing as CLN. Make sure that you have identified the correct sensors on the machine (start counting #1, #2, etc from the beginning of the sensor loop). The best way to clean the sensors, is to pull the bottom hose off (no need to remove the sensor entirely from the machine), and use a soft bristle pipe brush with soapy water to clean the inside of the sensor. Replace the bottom hose and repeat this process for all the sensors showing as CLN.
If, after cleaning the sensors (not just wiping out with your finger) the sensor is STILL showing as CLN, the sensor should be replaced.