Siemens SINAMICS G120D Original Instructions Manual page 298

Corrective maintenance
10.13 If the converter no longer responds
Case 2
● The motor is switched off.
● You cannot communicate with the inverter, either via the operator panel or other
interfaces.
● The LEDs flash and are dark - this process is continually repeated.
Procedure
Proceed as follows to restore the inverter factory settings:
1. Remove the memory card if one is inserted in the inverter.
2. Switch off the inverter power supply.
3. Wait until all LEDs on the inverter go dark. Then switch on the inverter power supply
again.
4. Wait until the LEDs flash orange.
5. Repeat steps 2 and 3 as often as required until the inverter outputs fault F01018.
6. Now set p0971 = 1.
7. Switch off the inverter power supply.
8. Wait until all LEDs on the inverter go dark. Then switch on the inverter power supply
again.
The inverter now powers up with the factory settings.
9. Recommission the inverter.
You have restored the inverter factory settings.
298
Converter with control units CU250D-2
Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA