Elevator Forum

It was always aircraft cable, it came from MAC Spares. I never inquired about the number of lays, but 7x19 doesn't seem quite right.

where is the motor field voltage/current at? Has the motor been checked out?

The nomenclature looks to be old Montgomery.

Had a similar problem once, it turned out to be worn shoes on the selector tape. Maybe worth a look.

Are the shield wires grounded properly? One end only. I would look at that closely.

So going back to your original post. Instead of holding the P switch, jump terminal 5 to 6 on the comparator board, this will let you run temporarily ...

Yikes!, as I said these are hard to troubleshoot without spare boards. Just something to try, the 1 ea and 2ea are identical. switch them around and s...

You should be able to buy the SCRs at a good electronic supply if you have the part number.

With a meter on ohms, or a continuity checker. Put the negative lead on the cathode of the SCR ( the large post ), and touch the positive lead to the ...

As I recall, the Resolve 20, and Resolve 100 were Mod packages.

At what point in the travel are you tripping? If it is immediate it is prob a bad SCR or a bad SCR firing board. A bad 3ea board cand also do it. If i...

Comp ropes are there to compensate for the weight of the hoist ropes when the car or counterweight is below midway in the hoistway. There should be no...

I would certainly put a tank heater in, you have tried everything else. A cheap workaround, just to see if oil temp is the issue is to put a heat lamp...

Is there a tank heater? Or does this run the motor to heat the oil? If it runs the motor to heat, make sure the valve isn't moving the car when it is ...

Have you checked the thermistor in the motor? I think it is run in the same cable as the machine stop switch. It will throw the same fault.