Corrective maintenance
9.3 Firmware upgrade and downgrade
Converter with the control units CU240D-2
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Operating Instructions, 04/2018, FW V4.9 SP10, A5E34262100B AF
Procedure
1. Remove the connector for the 24 V power supply of the
Control Unit.
2. Remove the Control Unit from the Power Module.
3. All Control Unit LEDs are dark.
4. Insert the card with the matching firmware into the slot on
the rear side of the Control Unit until you can feel it lock in
place.
5. Insert the connectors for the Control Unit 24 V power sup-
ply.
6. Switch on the 24 V power supply.
7. The Control Unit transfers the firmware from the
memory card into its memory.
The transfer takes between 5 and 10 minutes.
During the transfer, the BF LED will flash orange
at a variable frequency.
Because the Control Unit is separated from the
Power Module, the RDY LED will additionally
shine red.
8. At the end of the transfer, the LED RDY and BF slowly
flash red (0.5 Hz).
Power supply failure during the transfer
The inverter firmware will be incomplete if the power sup-
ply fails during the transfer.
•
Start again with Step 1 of these instructions.