1. Each VFD should be cleaned and protected once a quarter. Protecting and cleaning equipment must have specific records and the signature of the person in charge. As long as the management is in place, the task can be completed with quality and quantity;
2. Before cleaning, the power supply must be blocked, and the voltage must be reduced to a safe voltage before starting to work.
3. When cleaning, first of all, use a brush to clean the dust on the surface of the VFD, but it is not recommended to clean the VFD with a compressor; Clear VFD，
4. If the VFD has oil stains on the surface, it should be carefully scrubbed with a cloth dipped in a small amount of alcohol, and it must be dried with VFD before it can be used again;
5. At the same time of repair, carefully check the VFD, check the VFD, whether there is a heating and discoloration part, whether the cement resistance is cracked, and whether the electrolytic capacitor has explosion-proof holes protruding.
6. Regarding the conditional detachable shell, use compressed air to blow away dust inside and in the air path. When using compressed air, it is necessary to pay attention to the fact that some compressed air has a large water content, so it should be discharged before blowing.
It is important to note here that it is best to use a vacuum cleaner after disassembly during the cleaning process, and try not to use compressed air. Due to the worst effect of blowing with compressed air, it will run a normal shift after blowing the old VFD alarm, which will affect the normal operation of production.
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The low-voltage fuse cannot be used as an overload maintenance for the motor.
It is necessary that the additional voltage of the fuse is greater than or equal to the operating voltage of the distribution line.
The additional current of the fuse must be greater than or equal to the additional current of the melt.
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