Alarms, faults and system messages
10.2 Faults
A fault indicates a severe fault during inverter operation.
The inverter signals a fault as follows:
● At the operator panel with Fxxxxx
● At the inverter using the red LED RDY
● In bit 3 of status word 1 (r0052)
● Via STARTER
To delete a message, you must resolve the cause of the fault and acknowledge the fault.
Every fault has a unique fault code and also a fault value. You need this information to
determine the cause of the fault.
Fault buffer of actual values
The inverter saves the time, fault code and fault value for every fault it receives.
Figure 10-5 Saving the first fault in the fault buffer
r0949 and r2133 contain the fault value - important for diagnostics - as "fixed point" or
"floating point" number.
The "fault time received" is in parameter r2130 (in complete days) as well as in parameter
r0948 (in milliseconds referred to the day of the fault). The "fault time removed" is written to
parameters r2109 and r2136 when the fault has been acknowledged.
The inverter uses its internal time calculation to save the fault times. More information on the
internal time calculation can be found in Chapter System runtime (Page 273).
If an additional fault occurs before the first fault has been acknowledged, then this is also
saved. The first alarm remains saved. The fault cases that have occurred are counted in
p0952. A fault case can contain one or several faults.
Figure 10-6 Saving the second fault in the fault buffer
Converter with control units CU240D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34262100B AB
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