9.4.3
Correcting an unsuccessful firmware upgrade or downgrade
How does the inverter signal an unsuccessful upgrade or downgrade?
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.
Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG
The inverter signals an unsuccessful firmware upgrade or downgrade
by a quickly flashing LED RDY and the lit LED BF.
Corrective maintenance
9.4 Firmware upgrade and downgrade
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