The wearing parts of the driver mainly include electrolytic capacitors for filtering and cooling fans, and their service life is closely related to the environment and maintenance of the operation.
Depending on the operating moment, the user can determine whether a wear part needs to be replaced.
Cooling fan
Perhaps the cause of damage: bearing wear, blade aging (the life of the fan is generally 3-40,000 hours).
Criteria for identification: whether there are cracks in the blades of the electric fan, and whether there is abnormal oscillation sound when the sound is turned on.
Substitution Note:
1. When replacing, it is necessary to use the type of electric fan specified by the manufacturer (the rated voltage, current, speed, and air volume must be the same);
2. When installing, it is necessary to pay attention to the direction of the fan symbol to be consistent with the direction of the fan air supply;
3. Don't forget to put on the protective cover.
Filtered electrolytic capacitors
Possible causes of damage: high ambient temperature, increased pulsating current due to frequent load jumps, and aging of the electrolyte.
Criteria: whether there is liquid leakage, whether the safety valve has protruded, the measurement of electrostatic capacitance, and the measurement of insulation resistance.
It is advocated to replace the bus electrolytic capacitor every 4-5 years.
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