I solve it.
I run the "BrakeTestMonitorSampleApp" on LBRMed and it looks ok now. No more warnings or errors in the protocol screen.
I saw in the manual that it is recommended to run this test every time before the start of the operation of the robot. It was a piece of information that I missed. So if you don't run this test, after 1 hour the robot blocks all functions and shows a warning about the break test, as we can see with the image that I post before.
Anyway, thanks for all help!