Switched on my new acti fry element heated straight away slight flash and now not working

I would suspect the oven thermostat, sounds like it was over heated and unsoldered itself. 60/40 solder melts at 218°C which is 425°F.

either a bad connection on the element terminals or faulty element

Bad switch.

check the wires,, follow them from the burner element back to the switch,. usually one of them burns off , you can check the wires with a simple meter ,, check for continuity

ISOLATE MAINS POWER BEFORE WORKING ON THIS APPLIANCE
Remove the back of the oven check temp controller before replacing or buying element, as this can often stop any heat being produced. The element is in front of the fan, if this model is fan assisted, remove fan, after removing element inspect to see any small hole in metal, if you see a large hole more than 10mm , this could be a sign that the fan needs cleaning. Clean fan with WD40, do not switch oven on untill fan has dried off. Then replace element, switch oven on low with door open, if you feel slight heat, go for a full test, gradually build up heat, keep on for at least 30 mins, make sure the oven reaches temp, you can expect some smell from a new element, this is protective oil, and considered normal.

Visit http://www.t-falusa.com and check the authorized local parts distributor on your area.

f the clean light flashes 7 times, pauses, then repeats...

When the dishwasher doesn't sense a water temperature increase, it will stop working and lock the functions (clean light flashes 7 times, all buttons are non responsive). It does this as a safety in case the element is broken and feeding electrical current into the water. Check the element for damage (burnt/shorted).

To clear the flashing light you will have to reset the console. Do this by closing the door and press these buttons in sequence...

-high temp wash
-heated dry
-high temp wash
-heated dry

...all the lights will turn on briefly and the machine will start a diagnostic cycle. You can press cancel or let the diagnostic cycle finish (1-2 minutes).
You should now be able to run the dishwasher as normal.

If the issue returns, you could have a problem with the heating circuit (ie. element, thermostat or wiring). It rarely happens but it could also be the door switch not engaging properly when the door is closed (slightly bend the door latch down making sure it doesn't hit the door when you close it).