Siemens SIPROTEC 5 Manual page 245

Device-Diagnostic Log
CPU overload failure:
If the failure remains, contact the repair service.
CFC failure:
Check your CFC chart in DIGSI for reasons and reload the configuration.
PCB link failure (sporadic):
•
Check the module configuration and interconnection.
•
If the failure remains, contact the repair service.
The connection to the detached operation panel is disturbed. Check the connection.
SIPROTEC 5, Operation, Manual
C53000-G5040-C003-C, Edition 08.2020
Maintenance, On-the-Spot Assistance and Test
10.2 Error Search and Correction
245