Corrective maintenance
9.2 Firmware upgrade and downgrade
Note
Power supply failure during the transfer
The inverter firmware will be incomplete if the power supply fails during the transfer.
Start again with Step 1 of these instructions.
7. Switch off the 24 V supply or remove the connector for the 24 V supply from the Control
Unit.
8. Wait until the LEDs on the Control Unit have gone out.
Decide whether to remove the memory card from the inverter:
– You leave the memory card in place:
⇒ If the memory card does not contain any data backup for the inverter settings, the
inverter writes its settings to the memory card in step 10.
⇒ If the memory card already includes a data backup, the inverter imports the settings
from the memory card in step 10.
– Remove the memory card: The inverter keeps its settings.
9. Mount the Control Unit on the Power Module.
10.Reconnect all plugs and switch on the 24 V supply.
11.If the firmware upgrade was successful, the Control Unit responds after a few seconds
with the RDY LED lighting up green.
If the memory card is still inserted, depending on the previous content of the memory
card, one of the two following cases has occurred:
– The memory card contained a data backup: ⇒ The inverter has taken over the settings
from the memory card.
– There was no data backup on the memory card: ⇒ The inverter has written its settings
to the memory card.
You have upgraded the inverter firmware.
Converter with control units CU240D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34262100B AB
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