Symptoms:
BUS_FET_SHORT Fault on the DCDC is the first fault — can be followed by FLY_CAP (both under voltage and over voltage).
It is important to go back in Grafana to check which was the first domino to fall.
What is the failure behind the fault?
There is a FET on the BUS side which can get shorted. The detection/fault is based on inrush of current from the DC BUS side when the DCDC is trying to go Active and pulling the DC BUS up.
Troubleshooting Steps:
On SYSGUI use the Reset Processor button. Do this three times. If that does not work, continue to the following steps.
Bring System to Standby.
Wait 10 seconds.
Bring System to Active again.
If not solved (remote CAN needed):
Bring System to Standby.
Enumerate the block misbehaving to CAN ID 0 — this will make sure it is the first block to go Active.
Bring System to Active.
If it fails, retry for a total of 3 times.
If the failure persists: Call out RMA.