Viessmann Vitopend 222w wont start controller

MitalR

Hi, 
I got a problem with my vitopend.

When unit starts there is red led blinking and display keeps loading (no error code).
There is no problem with heating but i cant control water temperature cos i cant see anything on the display just loading.

Any idea what might be the problem? Ive replaced control unit 3years ago.

Thank you

GW

Make the the display control cable is firmly plugged in. If it is, you may need a new display 

MitalR

Thank you for your response but display is running:
https://youtube.com/shorts/g-hWG4kU5Uo?feature=share

Im not sure if i have to buy new controller or it might be some smaller problem (cable, sensor etc) .
I dont want to spend lots of money on this old unit.

Thanks 

GW

Ah, I  haven’t seen that one, you need to get Viessman on the phone