I am a new member to this forum and not a appliance repair person. I fix them as they break. Over the years appliances have become very dependent on electronics and more complicated than they need to be. IMHO
Today it is my dishwasher. (Samsung DW80M996OUG/AA) It’s the fancy one with water-wall technology.
I found a service manual online but it’s not a very good one. At least I cannot fine the information necessary to do a good diagnosis.
I am reaching out to your community in hopes of getting pointed in the right direction.

It is typical under the counter installation. Drainage is though an air gap into the disposal.

Signs and symptoms
1. When first installed it flashed an error code LC. (water leak) I can not find any leak or any evidence of a leak.
a. If left sitting for a day or so is will run an entire cycle but not two.
b. It will flash the LC code on the second attempt
i. Sounds like a leak but…………………
2. Sidebar, the water wall arm never parks itself in the back of the machine. But then again, I don’t know if it is supposed to.
3. For some time, it worked just fine. It could even complete the longest cycle.
4. Then it started emitting a string of three beeps. If left unattended to it would finally stop beeping and then complete the chosen cycle.
5. Now it does the 3-beep thing and then throw the LC code.
6. If allowed to sit for a day or so it will once again complete (1) cycle
Questions
1. Has anyone had or having a similar problem?
2. Does anyone know how to get a service manual?
a. More like a training manual about how the machine is supposed to work.
Any assistance or ideas will be greatly appreciated.