BQ25172: BAT OCP Fault

Part Number: BQ25172

Tool/software:

Hello team,

My customer is using this device for charging 6 cell NiMH battery.
However, sometimes fault is detected and BQ25172 stops charging the battery. (1Hz blinking on STAT pin)

On the datasheet 7.4.4, it lists nonrecoverable fault.

Question 1
In what condition would ISET pin short to GND? It is only connected to resistor to GND.

Question 2
In what condition, BAT OCP happen beside ISET pin short? Would it be Battery short failure?

Best Regards,
Kei Kuwahara