NORD Drivesystems BU0090 - Manual (Page 65)

7 Faults
BU 0090 GB 65
7 Faults
7.1 Troubleshooting
The majority of frequency inverter functions and operating data are continuously monitored and simultaneously
compared with limiting values. If a deviation is detected, the inverter reacts with a warning or an error
message.
Basic information on this topic is contained in the manual for the basic equipment.
Errors cause the frequency inverters to switch off, in order to prevent a device fault.
The following options are available to reset a fault (acknowledge):
1. switching the mains off and on again,
2. By an appropriately programmed digital input (P420 ... P425 = Function 12),
3. By switching of the “enable” on the frequency inverter (if no digital input is programmed for
acknowledgement),
4. by bus acknowledgement or
5. by P506, the automatic error acknowledgement.
Device LEDs: As delivered, with SK 300E series devices (except ATEX versions) and SK 500E (without
technology unit), 2 LEDs (green/red) are externally visible. These signal the actual device
status.
The green LED indicates that the mains voltage is present and operational, while a flashing
code that increases in speed shows the degree of overload at the frequency inverter output.
Thered LED signals actual error by flashing with a frequency which corresponds to the
number code of the fault.
The following table shows all the faults which are attributable to bus operation. In the operating display of the
optional "ControlBox" only error E010 is displayed. A finer categorisation of errors can be obtained from the
information parameters P700 "Actual Faults" or P701 "Last Fault 1...5".
7.1.1 Error display
ControlBox / SimpleBox: The 4-digit, 7 segment display of these boxes indicates a fault with its number and
the prefix "E". If the cause of the error is no longer present, the error display flashes and the error can be
acknowledged with the OK key.
ParameterBox: The error messages are shown in plain text.
7.1.2 Error memory
The current error is saved in parameter P700 and the last five error messages are saved in parameter
P701 [-01]…[-05]. Further information on inverter status at the time the error occurred are stored in parameters
P702 to P706 / P799. More detailed information can be found in the main manual for the frequency inverter.