Festo CPX - SF (System Failure) System Fault

5. Diagnostics and error handling
5−7
Festo P.BE−CPX−SYS−EN en 0902e
SF (system failure)  system fault
LED (red) Sequence
1)
Status Meaning / error handling
LED is off
ON
OFF
No fault 
LED flashes
ON
OFF
Simple fault/information
(error class 1)
See explanation of fault numbers in
section 5.2.3
LED flashes
ON
OFF
Error
(error class 2)
See explanation of fault numbers in
section 5.2.3
LED flashes
ON
OFF
Serious fault
(error class 3)
See explanation of fault numbers in
section 5.2.3
1) The system fault LED flashes depending on the class of fault which has occurred.
Error class 1 (minor error): one flash, pause
Error class 2 (error): flash twice, pause
Error class 3 (serious error): flash three times, pause