28 September 2021
Fault code ILF: Internal Link FaultProduct Line:
All models and serial numbersCause:
This fault appears when the communication between the option board and drive is interruptedResolution:
Internal serial link fault.
Check the +24v dc on control terminal board
Check the environment (electromagnetic compatibility).
Check the connections to make sure there are no shorts on terminal side.
Replace the installed option board.
Change the control terminal pod
Change the Main control board.