Series 16/18/160/180-Model C Maintenance Manual, GFZ-62755EN ...

8. TROUBLESHOOTING B–62755EN/01 #0(OFA):Overflow alarmcauses1 Wrong setting of servo parameters 1800s.2 Main CPU (1axis to 4 axes) or option 2 board (5 axes or more)CAUTIONWhen the main CPU board is replaced, all the data storedin memory is lost. Set NC data again, referring to chapter3 “input/output of data”.When 1 is displayed atDGN 204DGN0204#7#6OFS#5MCC#4 #3 #2 #1 #0#6(OFS):#5(MCC):A/D converter used for current feedback in the digital servo is abnormal.Contacts of electromagnetic contactor in the servo amp. is blown.→LED7 lights.Serial pulse coder C is an incremental pulse coder. #6(OFS):A/D converter isabnormal #5(MCC):Contacts ofelectro–magneticcontactor is blown withinservo amp.Main CPU board or option 2 board is faultyWhen the main CPU board is replaced, all the data stored in memory islost.Set NC data again, referring to chapter 3 “input/output of data”.Check LED ofservo amplifier[7] ?NO (Not lit)LED [7] Contacts of electro–magneticcontactor is blown in servoamplifierYESCheck input powervoltage of servo amp.YESAC200/220/230VCorrect? +10%,–15%NOServo amplifier is faultyCheck magnetics circuit360