Maintenance And Servicing; Chapter Content - Siemens SINAMICS S120 Equipment Manual
Chassis liquid cooled power units
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Also See for SINAMICS S120:
- Function manual (1094 pages) ,
- Diagnostic manual (947 pages) ,
- Manual (848 pages)
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Maintenance and servicing
9.1
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 line 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 Liquid Cooled Power Units
Manual, (GH7), 01/2011, 6SL3097-4AM00-0BP1
ensure the availability of the components.
DANGER
DANGER
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