Alarms, faults and system messages
11.2 Faults
Converter with control units CU250D-2
304 Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
Figure 11-7 Complete fault buffer
You have multiple options to acknowledge a fault, e.g.:
● PROFIdrive control word 1, bit 7 (r2090.7)
● Acknowledge via the operator panel
● Switch-off the inverter power supply and switch-on again.
Faults detected during the inverter-internal monitoring of hardware and firmware can be
acknowledged only by switching the supply voltage off and on again. The list of faults in the
List Manual contains a note on this limited acknowledgment possibility.
Emptying the fault buffer: Fault history
The fault history can contain up to 56 faults.
The acknowledgment has no effect as long as none of the causes for the faults in the buffer
have been removed. If at least one of the faults in the fault buffer has been removed (the
cause of the fault has been removed) and you acknowledge the faults, then the following
happens:
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