Corrective maintenance
8.2 Firmware upgrade and downgrade
Converter with the CU240B-2 and CU240E-2 Control Units
396 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
Correcting an unsuccessful firmware upgrade or downgrade
How does the inverter signal an unsuccessful upgrade or downgrade?
The inverter signals an unsuccessful firmware upgrade or dow
n-
grade by a quickly flashing LED RDY and the lit LED BF.
Correcting an unsuccessful upgrade or downgrade
You can check the following to correct an unsuccessful firmware upgrade or downgrade:
● Does the firmware version of your inverter fulfill the preconditions?
– For an upgrade, as a minimum V4.5.
– For a downgrade, as a minimum V4.6.
● Have you correctly inserted the card?
● Does the card contain the correct firmware?
● Repeat the appropriate procedure.
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