During a Category 5 (CAT5) safety test on a traction elevator equipped with a Smartrise SRA (V3 Cedes) controller, SRA with CEDES Absolute Positioning System, and a single door zone sensor, a potential safety concern was identified:
- The single door zone signal can fail, and the elevator may run with the doors open.
- Unintended car motion will not be detected as the system believes the elevator is always within a door zone. Further testing of the Unintended Car Movement Protection revealed that the car could drift 2438 mm (6-8 ft.) before stopping and does not meet the maximum 1220 mm (48 in.) required by Unintended Car Movement Protection.
- No injuries were reported.
Smartrise has issued a mandatory Technical Service Bulletin - TSB-0016 on December 10, 2024. TSSA is actively working with Smartrise to identify and implement a solution to address this issue.
TSSA is developing a Director’s Safety Order, planned for dissemination in early 2025 to recommend appropriate corrective actions. Industry consultation will follow.