Performing electrical work safely

Observe the following information to perform electrical work safely:

Electrical work may only be performed by a qualified electrician or an electronically instructed person under the supervision of an electrician.

Observe the 5 safety rules in the specified sequence when working on electrical components, unless there are important reasons to deviate from them (observe the specifications of DIN EN 50110-1 (VDE 0115-1)):

• Disconnect.
• Secure the device against a restart.
• Check that no voltage is applied.
• Ground and short-circuit.
• Cover or cordon off neighboring live parts.

The fact that the operation LED and other display elements are no longer illuminated does not indicate that the product has been disconnected from the supply system and no longer carries any voltage.