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Number
Cause
Remedy
F30004
Inverter overtemperature
Check whether the inverter fan is running.
Check whether the ambient temperature is in the permissible range.
Check whether the motor is overloaded.
Reduce the pulse frequency.
F30005
I2t inverter overload
Check the rated currents of the motor and inverter.
Reduce the current limit p0640.
When operating with V/f characteristic: Reduce p1341.
F30011
Line phase failure
Check the inverter's input fuses.
Check the motor cables.
F30015
Motor cable phase failure
Check the motor cables.
Increase the ramp-up or ramp-down time (p1120).
F30021
Ground fault
● Check the power cable connections.
● Check the motor.
● Check the current transformer.
● Check the cables and contacts of the brake connection (a wire might be
broken).
F30022
Power Module: Monitoring U
CE
Check or replace the inverter.
F30027
Time monitoring for DC link pre-
charging
Check the line voltage.
Check the line voltage setting (p0210).
F30035
Overtemperature, intake air
● Check whether the fan is running.
● Check the fan filter elements.
● Check whether the ambient temperature is in the permissible range.
F30036
Overtemperature, inside area
F30037
Rectifier overtemperature
See F30035 and, in addition:
● Check the motor load.
● Check the line phases
A30049
Internal fan defective
Check the internal fan and if required replace.
F30052
Incorrect Power Module data
Replace the inverter or upgrade the inverter firmware.
F30053
Error in FPGA data
Replace the inverter.
F30059
Internal fan defective
Check the internal fan and if required replace.
F30074
Communications error between
Control Unit and Power Module
There is a communications fault between the Control Unit and the Power
Module. Possible cause:
● The external 24 V Control Unit power supply has dipped to ≤95% of the
rated voltage for ≤3 ms
A30502
DC link overvoltage
● Check the device supply voltage (p0210).
● Check the line reactor dimensioning
F30662
CU hardware fault
Switch off the inverter and switch on again, upgrade the firmware or contact
technical support.
F30664
CU power up aborted
Switch off the inverter and switch on again, upgrade the firmware or contact
technical support.
F30850
Software fault in the Power Mod‐
ule
Replace the inverter or contact technical support.
A30920
Temperature sensor fault
Check that the sensor is connected correctly.
Alarms, faults and system messages
8.5 List of alarms and faults
SINAMICS G120C converter
366
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34263257B AF
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