371544 - N28 THE FUNCTIONS ARE NOT SELECTED WHEN THE BUTTONS ARE PRESSED

When several of the Front Panel buttons are pressed, the corresponding functions are not selected.
STEPOPERATIONS TO BE CARRIED OUTTEST RESULTS
1CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Connect the Examiner diagnostic equipment to the diagnostic connector and check the following at the Connect Node:In errors ambient

  • that there are no faults
Move on to Step Presence of faultsContinue following the instructions for the diagnostic equipment
2CHECK USING DIAGNOSTIC EQUIPMENT.ALL OKPROBLEMS ENCOUNTEREDACTION
Keeping the diagnostic equipment connected, check the following at the Connect Node:In parameters ambient

  • the functions relating to the Control Panel buttons are not activated (change of status - pressed / released)
Move on to Step The buttons are not working (there are no changes in status)Replace the Front Panel
3CHECK ON CORRECT OPERATIONALL OKPROBLEMS ENCOUNTEREDACTION
Check that the fault is no longer presentFault persistsReplace the Connect unit    See in Op. 5580P20 CONNECT CONTROL UNIT - R.R.