I am having troubles with an 1994 Otis LRV5L. this is a two stop, one opening elevator. to the best of what I have observed, this is what is happening. in the up direction coming into the floor, The UL1 hits the first magnet and drops UMV, then when it hits the second magnet and "releases" the UL1 input sensor ( light drops out in the processor), the processor doesn't always drop ULV (output), the elevator continues to run up level until it breaks the up directional. this kills all the up logic and the elevator levels down. then shuts down, light comes on to exit the elevator and the elevator travels to the 1st land and lets the passenger out.

I have refurbished the mother board and the power supply. this is a daily problem and looking for some advise.

thanks