The frequency converter must be disconnected from the mains if repair work is to be carried out. Check that the mains supply has been disconnected and the prescribed time has passed before removing motor and mains plugs.

• Make sure the frequency converter is properly connected to earth.
•  Protect users against supply voltage.
• Protect the motor against overloading according to national and local regulations.
• The earth leakage current exceeds 3.5 mA. 
• The [STOP/RESET] key on the control panel of the frequency converter does not disconnect the equipment from mains and is thus not to be used as a safety switch.
• Note that the frequency converter has more voltage inputs than L1, L2 and L3 when DC bus terminals are used. Check that all voltage inputs are disconnected and that the prescribed time has passed before repair work is commenced.