400
MOTOR OVERLOAD FAULT
Otis · DSD 412 Elevator System
What does 400 mean?
This fault indicates that the DSD 412 drive has supplied excessive motor current for a significant duration. This condition does not automatically shut down the drive but is signaled via the ALARM relay output K2.
Common Causes
- Dragging elevator brake causing increased mechanical load.
- Weakened motor field, leading to higher armature current for a given torque.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Refer to parameters #83 and #84 for proper drive setup and configuration.
- 2
Inspect the elevator brake for any signs of dragging or mechanical interference.
- 3
Assess the motor field strength for any indication of a weakened field.
Verified technical data. Last updated: March 2026
Related Faults
Source: Otis DSD 412 Elevator System