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Digiplan BLX75B showing error code 3 - EPROM memory map changed, but unable to clear fault.

Hi,
I have a Digiplan BLX75B drive that is displaying error code 3 (three flashes of the fault LED). I believe this means that the EPROM memory map has changed?

I have tried all three points of the following but this has not cured the problem: community.parker.com/.../error-code-3---memory-map-changed

Can anyone advise if there is any other way of curing this fault?

The unit is communicating via a terminal and the battery is brand new.

Thanks!