Extracted from these lines
[comment u/ApprehensivePost9595] The 68kn belts? That pulse board it GARBAGE! AND THE shorting bars are garbage.
[comment u/OddApartment956] Never worked on that specific model, but have had the same issue. Found you needed 10awg wire to properly discharge static. ... once the static fries the comms the board is toast. Fix the grounding and then swap the board.
[comment u/Aggravating-Knee3887] I worked at Otis 20 yrs, never had that issue or saw that type of pulse unit. Is that the “new” O model. Good luck pulse units can be finicky
