pl4tonas

From what I understand, the controller is a PWM one (Pulse With Modulation). I don't thing there is a voltage or current regulation. It should just give a constant peak voltage output but a variable duration (PWM) so as to have a variation in the brightness of the led. According to Specs: the output voltage depends on the input voltage. That to me means that it is equal to what you put at the input. So we conclude that your LEDs should have a series resistor that would limit the current passing through according to the voltage you supply to the controller. It also said that it uses a common anode (plus) which I believe it is a kind of open-collector output stage.

Where is the short? Is it the cable? Repair it. Is it at the output? Check the diodes that do the rectification and the diode that is parallel to the output and protects from overvoltages to the load. Sometimes is a zener diode. If the short is at the input and blows the mains fuse then check the power mosfet, the bridge rectifier or the IC that controls the mosfet.