Smart solar 100/20 Load does NOT turn on

Batteries are full.
Lifeo4.
Jumper is off
Load Voltage Reading 0V
App shows Load Off
Battery charges at 10A
Battery 12V system

I changed it to
Always on
Always off
Battery Life
None of them works

I played with other menu items but didn’t help.
No customer support
I didn’t have any issues with my cheap Chinese charge controllers. I am disappointed. This one supposed to be the best at $100.

Any ideas before I return it ?
Most likely its defective.