935
Calibration of bus voltage and armature voltage feedback circuits does not match.
Otis · DSD 412 Elevator System
What does 935 mean?
This fault indicates a mismatch in calibration between the bus voltage and armature voltage feedback circuits. It may occur during Self-Tune (Function #997) or Self-Diagnostic (Function #998).
Common Causes
- Missing wire to either the bus voltage or armature voltage feedback circuits.
- Component problem where feedback voltage divider ratios do not match.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check for any missing wires connected to the bus voltage feedback circuit.
- 2
Check for any missing wires connected to the armature voltage feedback circuit.
Verified technical data. Last updated: March 2026
Related Faults
Source: Otis DSD 412 Elevator System