When quantitative refueling china fuel dispenser

When quantitative refueling china fuel dispenser, the solenoid valve is fully open, and when the amount of fuel remaining 0.3 to 0.5 l, Computer announced the closure large flow signal, low flow continued to fuel the preset number, and finally closed low flow, a closed motor, This does not render overpayments oil appearance. When the solenoid valve diaphragm remove or turn inside use, fuel quantity reaches the preset number, the board announced that the signal can not be a closed circuit, continuous high flow fuel, so that appears to show plate number greater than the preset number refueling.
Thus, when the solenoid valve can not be opened so that no oil auto fuel dispenser, should be properly repaired. First, you should see some of the solenoid valve control circuit, such as the zero line is not entered, the light valve plate is not damaged. Secondly, look up inside the valve solenoid valve itself wrong problems, such as the valve is not open circuit coil, diaphragm aperture is not obstruction. If the solenoid valve itself is wrong and can not be amended, should be replaced with new solenoid valve. Also at the time of purchase to pay attention to the type solenoid valve being replaced together.