Where is diverter valve located in Danfoss HIU?

There has been no heating in my flat since early this morning. I have checked the bleeding of radiators and pressure in the heating system. Both of these seem to be not an issue.

There is hot water running in taps. It appears that diverter valve might be faulty and need replacing.

But the replacement will happen on Monday and it appears that I can set it to manual mode ( at least that's what some videos on YouTube tell so ) to restore heating temporarily.

I can not seem to find the valve and place to set it to manual mode.

Can you help here? Thanks a ton!!