K2636 at 230VAC 50Hz, arc problem

Hi,
I bought this Kit in Germany and assembled it.

I connected it to an Motor an 230VAC 50Hz, but the fuse blow, because of an arc between coil and the red capacitor and at the triac.

What did go wrong?!

Some pictures (black lines = points with arc’s)

dropbox.com/s/1mdfaaho33qc3 … 6.JPG?dl=0

dropbox.com/s/i3oaejiutld0b … 7.JPG?dl=0

regrades