Home Forums General Discussion Technical Questions Otis 211 AT400 door problem

had a problem with black belt operator on a 211, changed to the AT400. door learns and setup properly, turn to auto and as soon as dcl goes high (comes off limit) doors close back. if I hold the door open button or break detector beam, doors open until release button or unobstruct beam. Any ideas appreciated, problem something simple I'm missing and no prints on job

Are you still on local operation, los input?

Stuck door close button?

Do you have a tool to monitor inputs to the operator?

Been tracing back, found right diagrams, looking like the program chips corrupted.