Elevator Forum

So you did get the drive to clear and give you Safe without an alignment? What changed? Did you replace the interface board again, or was there someth...

Yes I have gone through ALL of this, the power supply voltages are solid. A month ago I set up the MSU and NTS board from scratch VC, VMP+/- and MI +/...

Yes, Yes, & No. If the encoder was reversed the car wouldn't run at all.

Every single one, and I have detailed the controller terminals twice. Last week I went through the drive terminals and found one terminal on the feedb...

Today I noticed a false start when the car was at the bottom floor with the doors already closed. It would only happen leaving the bottom floor and wi...

Thanks, I'll look at some of those. This is the original equipment in this building. A couple of strange things here, yesterday I was making the car d...

Tripping the ring and string in one car should not put another car on seismic. They are isolated. If you want to bypass it while you work on it you ju...

It's funny how simple these things look until you really get into something. Most of the big relays have 2 coils, seems to be a pick coil and a hold c...

Well I got a good print, looks like control voltage comes from the exciter. Not something I considered since the car runs if I help the direction and ...

Either should work.

The UIT is fingerprinted to the job on TAC20s. Most likely someone has either installed a UIT from another car or loaded software not for that job. If...

You should be able to get to that through the drive commands in the service menu. You have to either remove the ropes from the drive sheave or put a t...

I'm not sure, but you may have to do an encoder alignment first