The periodic inspection must show that the equipment / device is installed, designed, equipped, maintained and cared for by local regulations, so that the operation can be done without risk to workers and the environment. By devices it must also be determined whether the protection measures against exceeding the allowable limits are functioning properly.
Periodic maintenance is carried out according to the Order Chapter 5, Annex 3 paragraph 2.1 and WEA guides.
When servicing units checked further by Order § 11 paragraph. 3 and 4.