Just an FYI Brian, there are probably many reasons for a fault light, but I experienced it when boondocking at Quartzsite and battery power got down to around 12.0vdc, the fault light came on and even resetting it wouldn't work. Was sort of surprised, but an Oasis repair guy told me it was protecting itself from low voltage. After the generator came on and I hit reset it went away and worked fine, but resetting at the "low" voltage, it would not stay on and returned to fault immediately.
2019 Grand Design Imagine 2500RL
2020 Ram 1500 Limited 4X4