Hi and welcome to FixYa, I am Kelly.
I also came up with nothing as far as a service manual or a schematic of any kind for your induction cooktop.
You can try to contact them here:
Spring USA at 800-535-8974
[email protected]
It appears they have no regional distributors and that they are the single source for any post sales product support be it parts or service. I am sure this is not the answer you wanted from FixYa but given the single source product support environment it is the best we can do.
Thanks for giving FixYa the opportunity to try and help you for free.
Kellly