Maintenance And Servicing; Chapter Content - Siemens SINAMICS S150 NEMA Operating Instructions Manual

Maintenance and servicing

11.1

Chapter content

This section 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 cabinet units
● Replacing device components when the unit is serviced
● Forming the DC link capacitors
● Upgrading the cabinet unit firmware
● Loading new operator panel firmware from the PC
Not observing fundamental safety instructions and residual risks
Failure to observe the basic safety instructions and residual risks in Chapter 1 can lead to
accidents resulting in serious injury or death.
• Comply with the basic safety instructions.
• Take into account residual risks when assessing risks.
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 5 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 5 minutes have elapsed.
• Measure the voltage before starting work on the DCP and DCN DC link terminals.
Electric shock from external supply voltages
When an external supply voltage for individual options (L50 / L55) is connected or an
external 115 V AC auxiliary supply is used, dangerous voltages are still present on the
components even when the mains switch is open.
Contact with live parts can result in death or serious injury.
• Switch off external supply voltages and external 115 V AC auxiliary supply before
Enclosed Drives
Operating Instructions, 12/2018, A5E36652151A
WARNING
DANGER
DANGER
opening the device.
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