Sigma II User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting9 - 39.1.2 Servo Amplifier InspectionFor inspection and maintenance of the servo amplifier, follow the inspection proce-dures in the following table. Perform inspection and maintenance at least once everyyear. Other routine inspections are not required.Servo Amplifier Inspection Part Replacement ScheduleThe following parts are subject to mechanical wear or deterioration over time. Toavoid failure, replace these parts at the frequency indicated.The parameters of any servo amplifiers overhauled by Yaskawa are reset to thedefault (standard factory) settings before shipping. Be sure to confirm that theparameters are set to the application’s requirements before starting operation.Periodic Part ReplacementOperating Conditions:Ambient Temperature: Annual average of 30°C.Load Factor: 80%, maximum.Operation Rate: 20 hours/day, maximum.Action orProblem Frequency Procedure CommentsClean interior andcircuit boards At least every year Check for dust, dirt, and oilon the surfaces. Clean with compressed air.Loose screws At least every year Check for loose terminalblock and connectorscrews. Tighten any loose screws.Defective parts inunit or on circuitboards At least every year Check for discoloration,damage or discontinuitiesdue to heating. Contact Yaskawa.Part Standard Lifespan Replacement MethodCooling fan 4 to 5 years Replace with new part.Smoothing capacitor 7 to 8 years Test. Replace with a new part, if necessary.Relays — Test. Replace if necessary.Fuse 10 years Replace with new part.Aluminum electrolyticcapacitor on circuitboard 5 years Test. Replace with new circuit board, if nec-essary.
