The full title on the prints is as follows;
62 & 70 UCL CONTROLLER
SIMPLEX-UMV-COLLECTIVE CONTROL- 3 PHASE-3 WIRE
W/TYPE 6970A DOOR OPERATOR (REACTOR)- W/O ATTENDANT
SALES#186794 SERIAL#195171
I changed the pawl magnet that lifts the switches earlier this week. When I tested it the problem was still there. Further tracing led me to the GL relay.
The selector will take a call, GL will engage, the pawl magnet will initially lift the switches, the car will begin travelling slow speed. But when GL does not drop out, the pawl magnet de-energizes and drops the switches, and the car continues in slow speed to the next call.
If I manually pull out GL while the car is travelling in slow speed, the pawl magnet will lift the switches and car will travel at high speed to the next call.
I'll be getting back into the motor room later this week to test out if GL coil is bad. Will report back.
Thank you all for the advice.
Jim Leon