No? No what? If it isn't accepting the coin I would think it is defective in some way.
What you said was... as he has two coin mechs and one of them is accepting them and the other isn't then send the defective one back. However... That's not the case. What he was saying is that this mech is sending the coin down the right hand mech exit (Reject) instead of the left hand mech exit (Coin Accept). Not that he has a right hand mech that works and a left hand one that doesn't.
Not necessarily defective! more likely, just not set up for these tokens. Coin mechs are designed to reject slugs. IE It thinks the token is defective. That may be due to the different thickness of this token or due to the different weight of this token.. It doesn't actually mean that the mech is necessarily defective. Just that it thinks these tokens are fakes.
It may just need setting up properly. They can be adjusted.... See the two screws with the red paint locking them?? those are for mech adjustment turn one way they tighten the accept (reject more).. turn the other way they slacken the accept (accept more). HOWEVER!! Word of caution here... if you don't know how to do it properly you can screw it up completely.
As I said, send it back to HAPP with the token and get them to send you one that works with that token.
Best Regards,
Julian (Fozzy The Bear)