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Service and maintenance
8.2 Replacing the Control Unit
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
283
Procedure for replacing a Control Unit without a memory card
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Disconnect the line voltage of the Power Module and (if installed) the external 24 V
supply or the voltage for the relay outputs DO 0 and DO 2 of the Control Unit.
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Remove the signal cables of the Control Unit.
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Remove the defective CU from the Power Module.
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Plug the new CU on to the Power Module.
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Reconnect the signal cables of the Control Unit.
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Connect up the line voltage again.
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The converter goes into the "ready-to-switch-on" state.
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If you have backed up your settings:
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Load the settings from the operator panel or via STARTER into the converter.
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For converters of the same type and the same firmware version, you can now switch-
on the motor. Check the function of the drive
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For different converter types, then the converter outputs alarm A01028. This alarm
indicates that the settings that have been loaded are not compatible with the
converter. In this case, clear the alarm with p0971 = 1 and recommission the drive.
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If you have not backed up your settings, then you must recommission the drive.
Summary of Contents for SINAMICS G120 CU230P-2
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