The MP does not recognize the command. An illegal command was entered through the MP front panel keypad on an MP-30/35 system.
This error only occurs when the MP front panel on an MP-30/35 system is used.
What you should do:
To clear the error, press the MP CLEAR key on the MP front panel.
Enter a valid command. The mistake may be caused by operator input.
If the system gives the error message again, confirming that the function is illegal, use a legal function.