910
BLOWN FUSE FAULT
Otis · DSD 412 Elevator System
What does 910 mean?
One or more of the three AC line fuses is open. This condition is checked on power-up and can be confirmed upon request through the PCU F#998 PCU Diagnostics function, via measurements on the Armature Interface PCB, A2.
Common Causes
- One or more AC input fuses are blown.
- Power wiring problem.
- Faulty DSPR power relay.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check all AC input fuses for open circuits and replace any blown ones.
- 2
Inspect power wiring for problems.
- 3
Check for a faulty DSPR power relay.
- 4
Use the PCU F#998 PCU Diagnostics function to confirm the fault.
Verified technical data. Last updated: March 2026
Related Faults
Source: Otis DSD 412 Elevator System