Elevator Forum ForumsWhat’s NewRecent PostsMembers Forums General Discussion Technical Questions TST4 Overspeed test Notifications Clear all TST4 Overspeed test Technical Questions Last Post by Anonymous 1 week ago 1 Posts 1 Users 0 Reactions 1,024 Views RSS solidstate (@solidstate) Joined: 1 second ago Posts: 0 Topic starter 09/01/2018 7:50 pm [#22680] We have a TAC 50 that when we input the command TST4 for the annual test. IMS states that TST is disabled? Never came across this before. Any suggestions? Quote Share: