LED flashes in HT Dual

[Toktu]

Hi everyone!

I recently bought an HT Dual, and have noticed that after a few minutes working, like 20 minutes or more, if I take it off from the power supply and then plug it again, the LEDs flashes like 6 times or more, like if it was "warming", but it is already warm, and don't know if it is normal.

I know that it flashes when you turn it on, but don't know if it's normal that do this more than one time.

Maybe it's a dumb question, but I'm new with the HT Dual, and I'll be very thankful with your answers.