My
JK PB2A16S20P was working fine on initial wiring and testing. i did not connected the 2nd B8 wire and left it loose.
after testing, i reorganised the wires and tested again. this time B8 and B9 failed to show in the list and an alarm was generated!
the entire system failed, as the BMS wouldn't give any output in this state!!
this is when i started looking up things and came across this thread.
after going through the knowledge shared, i disconnected the BMS and pulled it out. after removing the covers i started to check for the status of the R01's shown in the photo posted earlier on this thread by
kommando. there are 8 on one side of the PCB and another 8 on the other surface, connected to staggered pins of the connectors. both the B8s have resistors connected to them in my board, and both the resistors are now showing open!!
i have ordered another BMS and have been scratching my head as to what led to this situation.
my best guess is that the loose 2nd B8 must have touched some battery terminal while rearranging the wires, and burnt out both the R01s.
(i did attach a ring lug to the 2nd B8 too, which was a mistake i now realise!)
Hopefully i should be able to source the 0402 R01s and replace them, and have a ready replacement BMS for future!
it was nice lesson learnt, and im sharing it here in hope that others reading this thread may avoid it!