I had a couple of odd things happen with a smart BMS this week.
1. Cell voltages were all in the 3.5 to 3.7v range. There was no over current or low pack or cell voltage condition, but the P- mosfets shut off anyway. It was kind of weird. They turned off once and then right back on again. A minute later they did it again 3 times in rapid succession. I then stopped and tried the throttle once more, which worked for a second and then the BMS stayed off. checking the BMS status didn't show anything wrong.
2. Last night, same BMS, on the dashboard it was displaying LT and the P- mosfets were off. Since the BMS is on LIPO packs, I had the HVC recovery voltage set to 4.2 volts. No cell was above 4v. I then set HVC to 4.1 volts and the LT disappeared and the mosfets enabled.
This BMS has been working well for quite a while now.