Maintenance And Servicing; Chapter Content; Maintenance - Siemens SINAMICS S120 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
Dangerous electrical voltage
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.
External supply voltages
When the external power supply or the external 230 VAC auxiliary supply is connected,
dangerous voltages are still present in components even when the main circuit-breaker is
open.
8.2

Maintenance

The devices comprise mostly electronic components. Apart from the fan(s), therefore, they
contain hardly any components that are subject to wear or that require maintenance or
servicing. Maintenance is intended to ensure that the equipment remains in the specified
condition. Dirt and contamination must be removed regularly and parts subject to wear
replaced.
The following points must generally be observed.
Chassis power units
Manual, (GH3), 01/2013, 6SL3097-4AE00-0BP3
ensure the availability of the components.
DANGER
DANGER
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