Alarms, faults and system messages
11.4 Faults
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
363
Figure 11-7 Complete fault buffer
In most cases, you have the following options to acknowledge a fault:
● Switch-off the inverter power supply and switch-on again.
● Press the acknowledgement button on the operator panel
● Acknowledgement signal at digital input 2
● Acknowledgement signal in bit 7 of control word 1 (r0054) for Control Units with fieldbus
interface
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 acknowledgement possibility.
Emptying the fault buffer: Fault history
The fault history can contain up to 56 faults.
The acknowledgement 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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