Overview Of Replacing Converter Components - Siemens SINAMICS G120 Operating Instructions Manual

9.2.1

Overview of replacing converter components

Permissible replacement of components
In the event of a long-term function fault, you must replace the Power Module or Control Unit.
The inverter's Power Module and Control Unit can be replaced independently of each other.
In the following cases you will need to replace the inverter:
Replacing the Power Module
Replacement:
● Same type
● Same power rating
Unexpected machine motion caused by incorrect/inappropriate inverter settings
Replacing inverters of different types can result in incomplete or incorrect/inappropriate
inverter settings. As a consequence, unexpected machine motion, e.g. speed oscillation,
overspeed or incorrect direction of rotation. Unexpected machine motion can result in death,
injury or material damage.
● In all cases that are not permitted according to the table above, recommission the drive
Special issue relating to communication via PROFINET: Device replacement without removable data
storage medium
The inverter supports the PROFINET functionality, replacing the device without data storage
medium. After replacing the Control Unit, the inverter is automatically assigned its device name
from the IO controller.
Independent of this, after replacing the inverter, you must transfer the settings of the old inverter
to the new inverter.
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG
Replacement:
● Same type
● Same frame size
Higher power rating
●
Power Module and motor
must be adapted to one an‐
other (ratio of motor and Pow‐
er Module rated power > 1/4)
WARNING
after replacing an inverter.
9.2 Replacing inverter components
Replacing the Control Unit
Replacement:
● Same type
● Same firmware version
After replacing the Control Unit, you must restore the inver‐
ter's settings.
Corrective maintenance
Replacement:
● Same type
Higher firmware version
●
(e.g. replace FW V4.2 by
FW V4.3)
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