Maintenance And Servicing; Chapter Content - Siemens SINAMICS S120 Equipment Manual

Maintenance and Servicing

8.1

Chapter content

This chapter provides information on the following:
● Maintenance and servicing procedures that have to be carried out on a regular basis to
● Exchanging device components when the unit is serviced
● Forming the DC link capacitors
Before carrying out any maintenance or repair work on the de-energized unit, wait for 5
minutes after switching off the supply voltage. This allows the capacitors to discharge to a
harmless level (< 25 V) after the supply voltage has been switched off.
Before starting work, you should also measure the voltage after the 5 minutes have
elapsed. The voltage can be measured on DC link terminals DCP and DCN.
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.
Chassis power units
Manual, (GH3), 10/2008, 6SL3097-2AE00-0BP3
ensure the availability of the components.
DANGER
DANGER
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