QTPlasmaC ARC_OK led not working

Hi
I testing all my input signals on a new installation by placing a shorting link on the inputs. I can see the ARC_OK input is working correctly but the ARC_OK LED on the main screen does not come on. I am using mode 2 at the moment. I have seen this on other working installations as well.
Is there a special way to set this up or how does it work?
 

Ok I think I have how it works. It looks like you have to pulse the torch or put it on before the LED is looked at

Yes, that is it.
Not very convenient, but it has to be done only once so it is OK.

Sure that not a problem at all.
Every time I do a new installation I am more impressed by QTPlasmaC.