Siemens SINAMICS G120 Operating Instructions Manual page 182

Operation
6.3 Start-up Behavior
Swapping a CU
The following procedure is given as a guide to perform a swap of a CU.
Caution
Data set compatibility
To ensure complete data set compatibility, it is recommended to perform an upload of the
parameter set from the CU to a new MMC prior to swapping the CU.
Before performing a CU swap take care of the following:
1. The PM is powered-down and disconnected.
2. Wait 5 minutes to allow the unit to discharge after switching off the line supply before
3. Remove the two-part terminals that are actually wired on the CU.
4. Remove the MMC.
5. Remove the CU from the PM.
Before switching on Power supply to the inverter take care of the following:
1. Fit the new CU to the PM.
2. Reconnect the two-part terminals to the CU.
3. Insert the MMC into the MMC-slot of the CU.
Swapping the PM
Caution
To ensure complete data set compatibility, make sure that all parameters are stored in the
EEPROM of the Control Unit (see P0014 or P0971) prior to swapping the PM).
Before performing a PM swap take care of the following:
1. The PM is powered-down and disconnected.
2. Wait 5 minutes to allow the unit to discharge after switching off the line supply before
Before switching on Power supply take care of the following:
1. The new PM is properly installed and connected.
2. The CU is fitted back on the PM.
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carrying out any installation work.
carrying out any installation work.
Operating Instructions, 11/2006, A5E00766042B AA
Control Units CU240S