For drives in continuous operation, the operating status can be visually checked from the outside. Regularly patrol and inspect the inverter to check whether there are any abnormal phenomena when the inverter is running. The following tests should usually be done:
(1) Whether the ambient temperature is normal, it is required to be in the range of -10 °C ~ +40 °C, and it is better to be about 25 °C;
(2) Whether the output current, voltage, frequency and other data displayed by the inverter on the display panel are normal;
(3) Whether the characters displayed on the display panel are clear and whether the characters are missing;
(4) Use a temperature measuring instrument to detect whether the inverter is overheated and whether there is a peculiar smell;
(5) Whether the inverter fan is running normally, whether there is any abnormality, and whether the heat dissipation air duct is smooth;
(6) Whether there is a fault alarm display during the operation of the inverter;
(7) Check whether the AC input voltage of the inverter exceeds the maximum value. The limit is 418V (380V×1.1), if the main circuit plus input voltage exceeds the limit, even if the inverter is not running, it will cause damage to the inverter circuit board.