Table 7.2 Periodic Inspection ChecklistInspection Area Inspection Points Corrective Action CheckedMain Circuit Periodic InspectionGeneral• Overall check of the main power circuit andground terminals Take appropriate actions (e.g., tightening looseconnections).• Inspect equipment for discoloration fromoverheating or deterioration.• Inspect for damaged or deformed parts.• Replace damaged components as required.• The drive has few serviceable parts and may requirecomplete drive replacement.• Inspect for dirt, foreign particles, or dustcollection on components.• Inspect enclosure door seal if present. Replacecomponents if cleaning is not possible.• Remove foreign particles and dust with a vacuumcleaner to avoid touching parts.Conductors andWiring• Inspect wiring and connections for discoloration,damage, or heat stress.• Inspect wire insulation and shielding for wear.• Repair or replace damaged wiring.Terminals • Inspect terminals for stripped, damaged, or looseconnections. • Tighten loose screws and replace damaged screws orterminals.Relays andContactors• Inspect contactors and relays for excessive noiseduring operation.• Inspect coils for signs of overheating such asmelted or cracked insulation.• Check coil voltage for over or under voltage conditions.• Replace damaged removable relays contactors or circuitboard.Braking Resistors • Inspect for discoloration of heat stress on oraround resistors.• Minor discoloration may be acceptable.• If discoloration exists check for loose connections.Motor Periodic InspectionOperation Check • Check for increased vibration or abnormal noise. • Stop the motor and contact qualified maintenancepersonnel as required.Control Circuit Periodic InspectionGeneral• Inspect terminals for stripped, damaged or looseconnections.• Check for tightness.• Tighten loose screws and replace damaged screws orterminals.• If terminals are integral to a circuit board then board ordrive replacement may be required.Cooling System Periodic InspectionCooling Fan • Check for abnormal oscillation or unusual noise.• Check for damaged or missing fan blades.• Replace as required.• Refer to Drive Cooling Fans on page 296 forinformation on cleaning or replacing the cooling fan.Heatsink • Inspect for dust or other foreign materialcollected on the surface. • Remove foreign particles and dust with a vacuumcleaner to avoid touching parts.Air Duct • Inspect air intake and exhaust openings. Theymust be free from obstruction and properlyinstalled.• Visually inspect the area.• Clear obstructions and clean air duct as required.LED Periodic InspectionLEDs• Make sure the LED lights correctly.• Inspect for dust or other foreign material that mayhave collected on surrounding components.• Contact your Yaskawa representative if there is anytrouble with the LED or keypad.• Clean the LED.Note: Periodic inspections should be performed every one or two years. The drive, however, may require more frequent inspection due topoor environments or rigorous use.7.2 InspectionYASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual 2937 Periodic Inspection &Maintenance
