Hello Richard ,
Thank you for writing in.
Since most of product with similar titles, it is hard for us to ensure the product you have bought.
Could you please tell us your order ID or the link of the product?
It is better that you can tell us more details of your operation, such as the input voltage/current, the wiring, the load, the working environment.
If you can, we sincerely hope that you can send us some images of your wiring to let us check the problem details.
You can send this info by email (service at droking dot com)
With your help, we can find a solution more quickly.
Looking forward to hearing from you.
Best regards