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NOTICE
Contamination
Contamination and dirt can damage the device.
Visually inspect the equipment at least once per year. For more information, please refer to
the section "Visual inspections".
Dust deposits inside the cabinet unit must be removed at regular intervals (or at least once
a year) by qualified personnel in line with the relevant safety regulations.
Note
The actual intervals at which maintenance procedures are to be performed depend on the
environmental and operating conditions. Define maintenance intervals for the drive which
reflect your plant-specific environmental and operating conditions and meet your availability
requirements. When doing so, take the prescribed maintenance intervals into consideration,
as well as the instructions for repairing and replacing installed components.
Note
Siemens offers its customers support in the form of a service contract. For further details,
contact your regional office or sales office.
Note
Inform the manufacturer about each maintenance job that has been carried out and about each
spare part replacement for the purposes of a reliability analysis.
9.2
Grounding the system
High voltage after shutdown
High voltages are still present in the drive even after it has been shut down. Touching the
drive can result in death or serious injury.
Only work on the power unit if it has been sufficiently grounded. Before touching the drive,
ensure that the following parts of the power unit are de-energized:
● Internal busbars
● Input and output terminals
● Auxiliary power supply
Always observe the five safety rules (Page 13)when carrying out any work on the device.
SINAMICS SM120 6SL38855?B
Operating Instructions 12/2015
WARNING
Maintenance
9.2 Grounding the system
93
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