YASKAWA ELECTRIC TOBPC73060034A Potentiometer Technical Manual 178 Troubleshooting8 TroubleshootingProblems with the option interface may trigger an operator error.Refer to the J1000 Technical Manual for errors not listed in thismanual.◆ FaultLED OperatorDisplay Fault NameoFA01 Option Unit FaultCause Possible solutionThe option unit is notproperly connectedto the driveTurn the power off and reconnect theoption unitLED OperatorDisplay Fault NameoPE05 Run Command Selection ErrorCause Possible solutionsFrequency referenceis assigned to anoption (b1-01 = 3)that is not connectedto the drive• Make sure that parameter b1-01 is setproperly• Reconnect the option unit to the drive