"Check Line Plz" error on VFD keypad

"Check Line Plz" error on VFD keypad

If there is a connection or communication issue between the control board and the LCD keypad you may get a "Check Line Plz" message.  No parameters or modes are allowed to be accessed. 

In this situation you should...
  1. First, check the cable on the back of the keypad to ensure it is not damaged. Swap out the cable if possible.  The cable is a standard straight-thru ethernet cable. 
  2. Swap in a known good LCD keypad.
  3. Replace the control board if the above does not work.