I have 10 hours on the new 915iS engine tach.  Engine always starts a little rough but after about 5 secs normally accelerates to 1800 RPM. Last flight, I had an abnormal start with very rough engine and no gauge indications.  Cycled the Lane A and it returned to normal and engine quickly accelerated to 1800 RPM. Today, I had the same problem, but when I cycled Lane A, I got flashing Lane A and Lane B fault lights. I cycled Lane B and Lane A again with no change. I shut-down the engine and restarted and everything worked correctly and the engine quickly accelerated to 1800RPM. 

Appreciate any thoughts?  Short video attached  


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