Display state A0: Up direction, when the elevator goes up G0: Flat layer, when the elevator is flat DO: Down direction, when the elevator goes down A1: Maintenance of the equipment room B1: Car top overhaul C1: Door lock loop, bright when closed D1: Safety circuit, light when normal E1: The elevator is faulty. F1: Overhaul in the car G1: Layer height measurement A2: Self-rescue operation B2: dedicated function C2: Parking status D2: 110% switch canceled E2: The door is stopped, and the elevator is forbidden when the door is activated. F2: Self-generation control, the elevator is self-powered and running G2: Fire, when the elevator is fired DP1: When the internal call board communication is faulty DP2: When the main CPU in the board communicates with the serial CPU, it is lit. Cargo Stair Lift,Residential Cargo Lift,Industrial Freight Elevator,Heavy Duty Freight Elevator XI'AN TYPICAL ELEVATOR CO., LTD , https://www.chinaxiantypical.com