I know this post is almost a month old, but since you did not get a reply, figured why not reply.
LLC obviously means "limited liability company." This means that you are a "limited" partner to the business and only would be liable for any monies you have invested, and are protected from anything beyond that. So no, it will not effect your personal credit If it were a sole proprietorship or a general partnership, then you would have a problem, but that is not the case here.