Feng shui ball is not so easy to tune. Smaller ones are easier to tune, while larger ones are more difficult to tune. You'd better ask the manufacturer to send someone to adjust such a big Feng Shui ball in your hotel. If you adjust it yourself, it's difficult to adjust it. For example, the manufacturers haven't adjusted several large Feng Shui balls we sold before. Alas, this thing is not easy. This is a technical job.
You can search for "Ji Feng Shui" in Baidu for consultation.