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Pressure control EPC-4A 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 hight 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.
