8 -2Maintenance and Inspection Outline of Free WarrantyThe free warranty period of the Inverter is as follows:Free warranty Period: This product is warranted for twelve months after being delivered to Yaskawa’s cus-tomer or if applicable eighteen months from the date of shipment from Yaskawa’s factory whichever comesfirst. Daily InspectionCheck the following items with the system in operation.• The motor should not be vibrating or making unusual noises.• There should be no abnormal heat generation.• The ambient temperature should not be too high.• The output current value shown on the monitor displays should not be higher than normal.• The cooling fan on the bottom of the Inverter should be operating normally. Periodic InspectionCheck the following items during periodic maintenance.Always turn OFF the power supply before beginning inspection. Turn OFF the main circuit power supply,wait for the time indicated on the front cover, and make sure the CHARGE indicator light has gone out, andthen perform maintenance and inspection. Be sure not to touch terminals right after the power has been turnedoff. Doing so can result in electric shock.Table 8.1 Periodic InspectionsItem Inspection Corrective ProcedureExternal terminals,mounting bolts, connec-tors, etc.Are all screws and bolts tight? Tighten loose screws and bolts firmly.Are connectors tight? Reconnect the loose connectors.Heatsinks Are the fins dirty or dusty?Clean off any dirt and dust with an air gun usingdry air at a pressure of 39.2 x 104 to 58.8 x 104 Pa(4 to 6 kg•cm 2).PCBs Is there any conductive dirt or oil mist onthe PCBs?Clean off any dirt and dust with an air gun usingdry air at a pressure of 39.2 x 104 to 58.8 x 104 Pa(4 to 6 kg•cm 2).Replace the boards if they cannot be made clean.Cooling fanIs there any abnormal noise or vibration orhas the total operating time exceeded20,000 hours?Replace the cooling fan.Power elements Is there any conductive dirt or oil mist onthe elements?Clean off any dirt and dust with an air gun usingdry air at a pressure of 39.2 x 104 to 58.8 x 104 Pa(4 to 6 kg•cm 2).Smoothing capacitor Are there any irregularities, such as dis-coloration or odor? Replace the capacitor or Inverter.
