This is a bit long but I thought it might help other SawStop users.
I've owned my PCS SawStop for over 5 years and during that time, I never had a problem. Recently, however, I was making a rip fence adjustment a bit too fast and the blade had not quite finished moving when I touched it with a metal rule. The brake fired. Just a "thunk" and the blade did not retract.
So I kick myself and go buy another brake. I install it and I'm back in business. No problem.
However, yesterday, I'm ripping some walnut and the saw stops - just like I had hit the paddle. But I hadn't hit the paddle. And when I recycle the saw (turn off, turn on) I'm getting lights saying the brake is not adjusted properly (solid red, slow blink green). I adjust and adjust but always get the same lights.
So I go to my supplier and they lend me a brake which install in my saw. Same problem.
Today I call SawStop and after much head scratching and trying different things, he has me adjust the riving knife to be a bit further from the blade. Success!
It seems that the brake has software in it and they have changed the software over time. The new brake apparently had software that was a bit more sensitive to the position of the riving knife. Either that, or the process of moving the riving knife block did something.
Anyway, I'm back in business. The guy at SawStop was very polite and competent. He just kept working with me, trying different things, until we got a success.
Now, I just have to see if it continues to work properly over the next few days, weeks and months. I'm optimistic it will.
Mike
[Since I was into the guts of the saw, I took the opportunity to lubricate everything. It's amazing how much better the mechanism works with a bit of lubrication.]