When I turn my mini split on, the indoor fan blows air all across the fan, after a while it will start blowing only on both end’s.  I can shut it off and right back on (like in 5 seconds) and it will blow all across then after a while go back to blowing like only 6″ of both ends.  I have looked it all over, inside and out and see no sign of ice anywhere on the inside or outside unit . It acts like possibly a vortex or something being created in the fan  ?  Sound weird?  I have a person coming tomorrow to check the level of charge but I’m sure there is no Ice.  It’s a Pioneer 36,000.  Been installed about 1 month.