Maintenance And Servicing; Chapter Content - Siemens SINAMICS S120 Manual

Maintenance and servicing

7.1

Chapter content

This chapter provides information on the following:
● Maintenance and servicing procedures that have to be carried out on a regular basis to
ensure the availability of the components
● Replacing device components when the unit is serviced
● Forming the DC-link capacitors
Danger to life if the fundamental safety instructions and remaining risks are not carefully
observed
The non-observance of the fundamental safety instructions and residual risks stated in
Chapter 1 can result in accidents with severe injuries or death.
• Adhere to the fundamental safety instructions.
• When assessing the risk, take into account residual risks.
Danger to life through electric shock due to the residual charge of the DC-link capacitors
Because of the DC-link capacitors, a hazardous voltage is present for up to five minutes
after the power supply has been switched off.
Contact with live parts can result in death or serious injury.
• Only open the device after five minutes have elapsed.
• Measure the voltage before starting work on the DCP and DCN DC-link terminals.
Danger to life due to electric shock from external supply voltages
When the external power supply or the external 230 V AC auxiliary supply is connected,
dangerous voltages are still present in components even when the main circuit breaker is
open.
Contact with live parts can result in death or serious injury.
• Switch off external supply voltages and external 230 V AC auxiliary supply before
Cabinet Modules liquid cooled
Manual, 10/2015, A5E37067587A
WARNING
DANGER
DANGER
opening the device.
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