Earthquake emergency return (EER) (or Earthquake Operation) is an elevator special mode. In this mode, upon activation of primary and/or secondary wave seismic sensors, all cars stop at the nearest floor, and park there with the doors open to facilitate the safe evacuation of passengers. The elevator controller shall be designed according to applicable code requirements for this mode.
- ↑ Seismic requirements for elevators, escalators and moving walks
- ↑ Hitachi introduces elevator with earthquake control operation system
- Earthquake emergency operation calibration - Appendix D (PDF)
- Diagram for Mitsubishi's earthquake emergency return operations
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|Elevator Special Modes|
Anti-Crime Protection (ACP) • Attendant service (AS) • Earthquake emergency return (EER) • Emergency power operation (EPR) • Fire service mode (EFS) (Fireman's elevator) • Independent service (ISC) • Inspection service (INS) • Medical emergency/Code Blue service (EHS) • Peak times modes (Up peak (MIT) • Down peak) • Sabbath service (SHO)
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