Zvs 1000 watt induction heater not working

I purchased a 1000watt induction heater
Assembled it but still not working
I am giving it a 48 v DC supply of 30 amp
The resistors are only heating even exhaust fan also not rotating
At start it rotates 1 second and goes off
The red led countinous glowing
But the heating is not happening please help me for these.
1000watt zvs induction heater 12v to 48v

Can you post a schematic for it, or a link from where you got it, then we can see what you have.

Do you have the polarity of the DC supply to the unit correct?