When the continuous action of coal stacking fault (2.5s continuous action is required) and deviation fault (5S continuous action is required) does not exceed the set time limit, there will be fault display and buzzer alarm. If it does not stop, click the reset button to eliminate the fault display and alarm, but it will not affect the operation of the belt conveyor system. Over temperature sprinkler control device is equipped with indicator light. When the surface temperature of the driving drum exceeds the set value, the control device outputs the action command, and the solenoid valve opens to spray water on the surface of the driving drum for cooling. At the same time, the control device buzzer alarms.