Elevator Forum

End up being loose loose wire in loop circuit on brush holder

Correction that was the pt4 relay right next to my scr pri board causing all my intermittent problems

Changed scr pri board right above drive and p4 relay my problem has home away

reading 24.99 dcv at gateway board,rung out 485 line it is good,changed gateway board and properly addressed it,there is a board in the pc ihave not c...

tac 50-04 very affected by noise make sure grounding is perfect only on one end

a lot of times you will get 1681 with 629 faults on the tac50/04,go over every single door lock check wire connections,burnish door lock contacts, ohm...