1, see random files
The motor fan is equipped with instructions for use, product certificate, electrical circuit diagram and packing list. Check the packing list and check the parts.
2, look at the shape of the motor fan
Look carefully at the motor fan cover and the fan blades motor for air conditional suppliersfor obvious deformation. Rotating the blades should be light and flexible and should not always stop at the same location.
3, see the startup performance
The starting performance is an important quality indicator of the motor fan. During the test, in the slow speed, 85% of the rated voltage of the power supply, the motor fan should be able to start from a standstill and operate normally. The shorter the time required for a motor fan to start from normal operation, the better the starting performance of the motor fan. .
4, look at the speed performance
After power-on, there should be no abnormal noise in the mechanical transmission part of the fan. When the electric fan is running at high, medium and low speeds, the motor and the fan blades should be stable, with low vibration and low noise. The motor fan should be agile and stop swinging without any pause, stagnation or jitter.
5, see if there is leakage
After the motor fan is powered, if the hand touches it, if it has the feeling of electric electricity, it will be tested with the test pencil. The test pencil also has a light-emitting display, which can determine the leakage of the casing, which cannot be required.
6, see the continuous operation of the motor fan
After the fan is continuously running, if the surface of the head casing is hot, the temperature is too high to be used. Under normal circumstances, the surface temperature of the head casing is below 50 °C, and there should be no hot feeling.
