Corrective maintenance
10.10 Firmware downgrade
Converter with control units CU250D-2
294 Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
11.If the firmware downgrade was successful, the Control Unit responds after a few seconds
with the RDY LED lighting up green.
Following the firmware downgrade the inverter is reset to factory settings.
12.Take your settings over from your data backup to the inverter.
See also section: Backing up data and series commissioning (Page 257).
You have updated the inverter's firmware to an older version and have adopted your saved
settings in the inverter.
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