Hello Benjamin,
Thank you for writing in and so sorry for the inconvenience caused on you.
Could you please tell us more details of your operation, such as the input voltage/current, the wiring, the load, the working environment?
Could you please tell us which fault LED is always on?
If you can, we sincerely hope that you can send us some images or video of the fault LED and the wiring to let us check the problem details.
You can send this information to us by email(service at droking dot com).
With your help, we can find a solution more quickly.
Best regards