WOW, now I have found this line (when nothing else helps you have to read user manual):

In the Scan Mode, if the transmitter or receiver has been shut off or disconnected for more than one second, both module and receiver need to re-boot (turn the power off, and back on) - thus ScanMode cannot be rebound in flight

so, this means that you can never get back control of model if there is some break in receiving signal that last more than second?

again, what is than purpose of two systems (scan and normal)? it seams that you have to do scan every first turning on that day, and after it scans, you have to turn it on normal.
is this so complicated for Hitec to do it automatically, or maybe my english is bad and i do not understand this properly?