Alarms, faults and system messages
9.1 Operating states indicated on LEDs
Inverter with CU240B-2 and CU240E-2 Control Units
246 Operating Instructions, 01/2011, FW 4.4, A5E02299792B AB
9.1 Operating states indicated on LEDs
The LED RDY (Ready) is temporarily orange after the power supply voltage is switched-on.
As soon as the color of the LED RDY changes to either red or green, the LEDs signal the
inverter state.
Signal states of the LED
In addition to the signal states "on" and "off" there are two different flashing frequencies:
6ORZIODVKLQJ
4XLFNIODVKLQJ
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Table 9- 1 Inverter diagnostics
LED Explanation
RDY BF
GREEN - on --- There is presently no fault
GREEN - slow --- Commissioning or reset to factory settings
RED - fast --- There is presently a fault
RED - fast RED - fast Incorrect memory card
Table 9- 2 Communication diagnostics via RS485
LED BF Explanation
On Receive process data
RED - slow Bus active - no process data
RED - fast No bus activity
Table 9- 3 Communication diagnostics via PROFIBUS DP
LED BF Explanation
off Cyclic data exchange (or PROFIBUS not used, p2030 = 0)
RED - slow Bus fault - configuration fault
RED - fast Bus fault
- no data exchange
- baud rate search
- no connection
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