Corrective maintenance
9.3 Firmware upgrade and downgrade
Converter with the control units CU240D-2
Operating Instructions, 04/2018, FW V4.9 SP10, A5E34262100B AF
305
9. Switch off the 24 V supply or remove the connector for the
24 V supply from the Control Unit.
10. Wait until the LEDs on the Control Unit have gone out.
Decide whether to remove the memory card from the inverter:
•
You leave the memo
ry card inserted: ⇒ If the memory card already includes a data
backup, the inverter imports the settings from the memory card in step 13.
•
You remove the memory card or the memory card does not contain any data backup:
⇒ In the step
13, the inverter restores the factory settings.
11. Mount the Control Unit on the Power Module
12. Reconnect all plugs and switch on the 24 V sup-
ply.
13. If the firmware downgrade 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 the facto
ry
settings.
14. If the memory card did not contain a data backup of the inverter settings, then you must
transfer your settings to the inverter from another data backup.
Backing up data and series commissioning (Page 245).
You have downgraded the inverter firmware to an older version.
❒
