Service and maintenance
7.2 Faults and Alarms
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
7-3
7.2 Faults and Alarms
Faults
In the event of a failure, the inverter switches off and the red LED "SF" will be on. The fault
code will be displayed via OP, STARTER or Communication interface (if fitted, resp.
connected).
Note
To reset the fault code, one of three methods listed below can be used:
1. Cycle the power to the inverter.
2. Press the Fn button on the OP
3. Use digital input 2 (default setting).
4. Set bit 7 in control word 1 (r0054)
Fault messages are stored in parameter r0947 under their code number (e.g. F0003 = 3).
The associated error value is found in parameter r0949. The value 0 is entered if a fault has
no error value. It is possible to read out the point in time that a fault occurred (r0948) and the
number of fault messages (P0952) stored in parameter r0947.
A detailed description of the fault messages is provided in the Parameter List.
The fault state indication by LEDs is shown in the following sections.
Alarm messages
The alarm code will be displayed via OP, STARTER or Communication interface (if fitted,
resp. connected). Alarm messages are stored in parameter r2110 under their code number
(e.g. A0503 = 503) and can be read out from there. A detailed description of the alarm
messages is provided in the Parameter List.
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