I can confirm that the message file can be read ok, as I can generate other faults, and the correct fault is displayed.
I have made 2 videos of the issue the first video is of the fault as it appears, the second video is of the motor controllers under the front of the machine. I notice during power down the Left Hand Controller does not display 972 which indicates a power drop. but the other two controllers display 972. I hope this information is useful to help the diagnosis.