(1) Whether there is an abnormal change in the sound during the operation of the motor, including whether there is vibration during the operation of the motor.
(2) Whether the installation environment of the inverter has changed. Whether the ambient temperature is normal, the operating temperature of the inverter is generally required to be in the range of -10 °C - +40 °C, and it is better to be about 25 °C.
(3) Whether the inverter cooling fan is operating normally, including whether the inverter cooling channel is unblocked. Whether the current, voltage, frequency and other data output by the inverter on the display panel are normal. Shows whether the characters on the panel are clear and whether they are short or missing.
(4) Whether the inverter is overheated. An infrared thermometer can be used to detect whether the heat sink of the inverter is overheating and perhaps for odors. Check whether there is a problem in the operation of the inverter, and the alarm appears.
(5) Regularly arrange the filter screen of the air inlet duct inside the electrical control cabinet on a daily basis. Always keep the control cabinet and frequency converters in a good clean condition. It is useful to remove the surface dust on the inverter and prevent it from entering the inverter. Especially metal dust. It is useful to remove the oil stain of the inverter cooling fan.
(6) Use the annual overhaul time, turn on the inverter, focus on the interior that cannot be seen during daily operation, and carry out cleaning operations. Use a brush or vacuum cleaner to clean the circuit board of the inverter and the internal rectifier module, IGBT module, DC filter electrolytic capacitor, input and output reactor and so on. Regarding the replacement of unqualified electronic components (Note; The internal filter electrolytic capacitor of the inverter generally needs to be replaced in 4-5 years).
(7) Check the cooling fan, the cooling fan is a component that is easy to damage. Its life is limited by the bearing (it is an axial fan). According to the operation of the inverter, the fan may be replaced once every 2-3 years or the fan bearing.
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