Hello. I’m working on a Kone miprom-HS with front and rear openings with MAC WG door controller. It uses these small Transmissive optical encoder modules. It seems the front door lost its parameters and is not re learning on its own. The doors open super slow (most times do not open all the way ) and close super slow or close really fast and slam. I see a telco connection on the MAC door operator board but I do not have this service tool. I think there is a procedure to learn the door open limit with out service tool? Does any one have this procedure?? I’m thinking to replace the optical encoder first to see if that solves problem. If not how do these door boards get set up if I have to replace it ? Is service tool necessary. Should I get it straight from MAC or Kone.