STAT led of the Pwerbox BT

Hello, since that morning The STAT led on my powerbox BT turn red very often.
It was not doing that before I tried to switch it back to Original mode using the IOS app.
My Twizzy is a T45 and I wanted to do that before bringing it to my Renault dealer for service so that I could remove the powerbox. This was the first time I tried this operation but apparently there is a problem doing that with the IOS app.
Maybe I should try to use the remote to switch it back to medium tuning and see if it makes a difference ?
I searched the Powerbox BT manual but could not find the meaning of the STAT led.
Thanks for your Help.
Jean-Michel