Home Forums General Discussion Technical Questions Otis E411MMS controller fault 2854

Working on an Otis E411 Last night had major power problems in the building .. I'm getting shutdown code 2854. SPT conn loss. Anybody have an advice ?

24V/Door Zone Sensors Lost..

Are those the position transducers ?

SPT secondary postion transducer. loss of SOK input to mlb3 board. MLB3 board supplies 24 volts to cartop SPT unit. the wiring of the unit then sends the 24 volts back to the mlb3 board to verify 24 volts available at cartop unit. fairly simple to diagnose problem. look at print, possible blown fuse, bad mlb3 board, traveling cable etc. for some reason SOK input is not correct.

Working with No print.

it was a bad board. Txs guys.

Hi...
Friend, wich board was the failure?