Disconnect feilds and feed them with 110VAC. Then messure voltage drop across each feild and see if they are equal. More than a volt are two differance can be a problem. Also as others have give good advice I have seen more overspeed in the up direction caused by load weighing than any other cause. On Otis equipment.
This idea is a good one. Also I have found that its a good idea not to get too technical from the start, as you can go around in circles. Is this a single car or in a bank? If more than 1 lift, I would check the ohms of the motor fields( as they burned out), then the same for the generator fields( shunt field, levelling field etc), then the resistance tubes(are these lift the ones with the dials?). Then compare this to another lift, which can give you a snapshot of the tuning from lift to lift, which may eliminate/or find an issue you may be having. Also I see that your lift is over speeding in the up direction by 70 fpm, and I seem to remember(rightly or wrongly) that tuners used to want a slightly less fpm in the up direction than the down, purely to eliminate the possibility of over speeding occurring due to the counterweight pulling the car down. Measure your speeds, chocking out 1E etc, as you may find which speed is out of whack. Also I would make sure that your not getting a very small short to earth on up main contactors which can also give you a out of compounding effect, however unlikely.
