Automatic leveling function: when for some reason, such as a power failure or improper operation of the car did not stop at any leveling bit Ge layer stations, electricity lock re-open elevator, this elevator down to the temporary automatic landing flat layer and displays landing floor, so that the normal operation of the elevator. Electrical door interlock function: The layers are electrical door interlock door switch, when any one landing door open, the elevator stopped, the door to keep people make the switch prompts: After the elevator station, a digital display where the landing, Open floor door call "occupied" button on the ladder box light, the presentation layer door open, press the "occupied" call box button on the buzzer please shut the door when prompted by layer, all layers of the doors are closed after a good " occupied "button light is off, the elevator can run normally. Car bit Ge operating direction display function: on each elevator hall call boxes were running up and down direction arrow. Liang said elevator being an arrow direction of the arrow to run, when the arrow is off, the elevator has stopped running, the car bit Ge where the floor by the digital display. Fault display self-diagnosis function: when the elevator failure, the digital display hall will be flashing in code to diagnose the fault and why. Significance of the code have introduced call answering function in a random file in the operating instructions: Press the call button, the button is selected floor lights, after arriving undo memory, LED off. In case of failure automatic shutdown feature: When the car and the counterweight obstacles, lift the host running the full stroke running time is greater than 10 seconds before lift host automatically stop running. Contactor blocking protection function: If the contactor coil failure after failure to disconnect the electrical contacts, the lift can not be started again, to ensure safety. Beeper function: Arrival beep prompts. Phase, wrong phase protection functions: control system equipped with off-phase protection relay prevents the elevator due to changes in the power supply phase sequence or phase caused by abnormal operation. Motor overload protection function: the control system equipped with a thermal overload relay, if the car is jam, other protective measures fail, resulting in motor overload, it can automatically cut off electrical power to protect the motor. Limit-protection: In the top of the hoistway and the lower end with limit switches and limit switches to prevent the car jump or pier at the end. Mechanical interlock contacts: contact mechanical interlock protection, in particular to ensure that the downstream reliable operation. Failure to re-start function: only after troubleshooting, and the control cabinet operation / maintenance switch to run bit Ge, re-transmission, the elevator to work, to prevent misuse and ensure safe and reliable. Ge hall door stopper mounted: mounted on the elevator hall door prevented in normal operation due to unusually open elevator hoistway door which led to the non-stop operation of the equipment normally Ge, more safe and reliable operation of the elevator. Note; some function as more optional features.