I have a 8UAPS radio. I turned on the radio yesterday for my first flight, moved all the control surfaces to make sure everything is working properly, and everything was working. We stated the engine, throttled up to clear and warm up the engine. I then looked down at the radio to set the timer and the only thing on the screen was "WARNIN", and nothing else, and I had no control of the plane at this point. I turned the ignition off to kill the engine, then i turned the transmitter off then on and every thing was working fine.

What does the warning mean? it was similar to a throttle cut warning but there was no beeping, it didn't say throttle cut, and I had no control of the plane.

Stephen Latus