Is is a must to do the "Regular maintenance" for my inverter?

Only qualified people can do the following work.
In the process of using frequency converter, the manager should check and maintain the machine regularly. The specific operation is as follows.
1. Check whether the heat sink is covered with dirt, clean the machine and absorb dust if necessary. This work should be performed from time to time.
2. Check whether the frequency converter indicator is normal, check whether the frequency converter button is normal, check whether the frequency converter display is normal. This inspection should be conducted at least every 6 months.
3. Check the input and output lines for damage or aging. This inspection should be conducted at least every 6 months
4. Cleaning and safety inspection of PV modules should be carried out at least once every 6 months.