automatic pump control

Function:
1. Start and stop the pump automatically
2. Protect the pump from damage caused by dry-running
3. Examine the water automatically

State LED:
1. Red LED lights up: The unit is off
2. Green LED lights up: The pump stops
3. Red LED and green LED flash alternately in slow speed: Pump in operation
4. Red LED and green LED flash alternately in high speed: Pump stops, waiting to start
5. Press the ON/OFF button for two second to start the unit: Press the ON/OFF button for five seconds to stop the unit.
Description for the exam process:
While the pump is in the absence of the water, it will start the first exam after 3mins, it will last 50seconds; Then the unit will examine in the following second to twelfth time in every 30 mins, and exam time will last 50seconds; And the unit will examine in the following thirteenth to forty-seven time in every 60mins, exam time will last 50seconds. The unit will stop in the forty-eight exam. During the exam process, it lasts 41 hours.