Fronius String Control 250/25 Operating Instructions Manual page 54

Warning Safety symbols:
Notices
on the Device
(continued)
Text of warning notices:
WARNING!
An electrical shock can be fatal.
Danger from DC voltage from solar modules.
More than one supply source.
Disconnect all supply sources before doing any maintenance work.
Make sure that the input and output sides in front of the device are not
charged before opening the device.
Dangerous voltage from solar modules that are exposed to light.
The connection area should only be opened by a licensed electrician.
Risk of serious injury and damage from
incorrect device operation
Do not use the functions described until you have thoroughly
read and understood the following documents:
- these operating instructions
- all operating instructions for system components of the photo-
voltaic system, especially the safety rules
Dangerous electrical voltages
6