Alarms, faults and system messages
9.5 List of faults
Inverter with CU240B-2 and CU240E-2 Control Units
256 Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
9.5 List of faults
Table 9- 11 The most important faults
Number Cause Remedy
F01910 Fieldbus SS setpoint timeout Check the bus connection and communication partner, e.g. switch the
PROFIBUS master to the RUN status.
F03505 Analog input, wire break Check the connection to the signal source for interrupts.
Check the level of the signal supplied.
The input current measured by the analog input can be read out in r0752.
F07011 Motor overtemperature Reduce the motor load.
Check ambient temperature.
Check sensor's wiring and connection.
F07016 Motor temperature sensor fault Make sure that the sensor is connected correctly.
Check the parameterization (P0601).
Deactivate the temperature sensor fault (P0607 = 0).
F07320 Automatic restart aborted Increase number of hot restart attempts (P1211). The current number of
start attempts is shown in r1214.
Increase wait time in P1212 and/or monitoring time in P1213.
Create ON command (P0840).
Increase monitoring time of power unit or switch off (P0857).
Reduce the wait time for resetting the fault counter P1213[1] such that
fewer faults are registered in the time interval.
F07330 Search current measured too low Increase search current (P1202), check motor connection.
F07801 Motor overcurrent Check current limits (P0640).
Vector control: Check current controller (P1715, P1717).
V/f control: Check current limiting controller (P1340 … P1346).
Increase acceleration ramp (P1120) or reduce load.
Check motor and motor cables for short circuit and ground fault.
Check motor for star-delta connection and rating plate parameterization.
Check power unit / motor combination.
Select flying restart function (P1200) if switched to rotating motor.
F07806 Regenerative power limit exceeded Increase deceleration ramp.
Reduce driving load.
Use power unit with greater energy recovery capability.
During vector control, the regenerative power limit in P1531 can be
reduced until the fault is no longer activated.
F07860
F07861
F07862
External fault 1 … 3 Remove the external causes for this fault.
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