Otis · DSD 412 Elevator System
The field bridge rating is determined by reading a sense resistor on the Field Interface board selected by SW1. If the resistance value is not recognized, a Field Sense Fault is declared, indicating a hardware fault. This fault requires a DSD power down.
Click steps to track your progress.
Check that J13 is seated properly.
Inspect the cable for defects.
Verify the Field Interface board selection via SW1 and the sense resistor value.
Replace the Field Interface PCB if faulty.
Replace the Drive Control PCB if faulty.