Safety Function The controller must meet the safety conditions below: (1) When the CPU is hanging up, the vehicle will stop functioning. (2) When the accelerator condition is unusual, the vehicle should be stopped. (3) It has a function that protects against motor and contactor short circuits. (4) If forward and reverse signals turn on at the same time, the vehicle must stop. (5) If something unusual happens, it indicates the status. (6) Even if a terminal of the controller makes contact with a high voltage line or grounding line, the controller will not crash nor run out of control. (7) When a different battery voltage is connected, the controller indicates the status. (8) When the lift potentiometer signal is unusual, the lift function will stop.