Using a A22680 psu to power a 1000w induction coil
Using a DC power supply to drive an induction coil is absolutely, positively not going to work. Never. You need a driver board (such as you show in your picture) to drive the coil with an AC signal.

What happens with the board you show is that, at the high frequency the board uses, the inductance of the coil produces an impedance which is much higher than the DC resistance, and this sets the power lever produced in the coil.

When you substituted the PSU, it is trying to drive the much (much!) lower DC resistance. This requires more current than the PSU can provide, so it shuts itself off.