F8000 is a collective diagnostic message for the following fatal hardware errors: F8060 Overcurrent in power section and F8069 +/-15-volt DC error. Normally, F8000 is not visible on the display of the drive controller because ‘F8060 Overcurrent in power section’ or ‘F8069 +/-15-volt DC error’ will be displayed shortly afterwards.
The particular cause of the error can be found in the diagnostic message which follows error F8000 (‘F8060 Overcurrent in power section’ or ‘F8069+/-15-volt error’).