gidday greenpants. the lift is a genuine otis 2 speed ac with a electronic selector about 20 years old. i would think they wired the drive to the high speed winding. there is an overlay for the drive to replace t and g on the old controllers and thats pretty much it. we took over the service contract and found that maintenance doesnt work on both lifts. in the motorroom the test books state it was tested on handslow and our spies tell us its never worked since installation but we believe its a crock and it MAY have been fiddled with. i think its a ovf 10/20 and i wondered if there was a parameter you can switch off or if a wire you can remove from the drive to stop maintenance to work BUT normal service will operate. when you try to drive the brake relay picks then drops and i think the imputs/outputs to the drive all seem ok.any help would be appreciated.