YASKAWA Z1000U Series Programming Manual

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YASKAWA Z1000U Series Programming Manual Manual pdf 169 page image

u Recommended Periodic InspectionTable 2.2 outlines the recommended periodic inspections for Yaskawa drive installations. Although periodic inspections shouldgenerally be performed once a year; the drive may require more frequent inspection in harsh environments or with rigoroususe. Operating and environmental conditions, along with experience in each application, will determine the actual inspectionfrequency for each installation. Periodic inspection will help to avoid premature deterioration in performance or product failure.Copy this checklist and mark the “Checked” column after each inspection.n Periodic InspectionWARNING! Electrical Shock Hazard. Do not inspect, connect, or disconnect any wiring while the power is on. Failure to comply can resultin serious personal injury. Before servicing, disconnect all power to the equipment. The capacitor for the control power supply remainscharged even after the power supply is turned off. The charge indicator LED will extinguish when the control power supply voltage is below50 Vdc. To prevent electric shock, wait for at least the time specified on the warning label; after all indicators are OFF, measure for unsafevoltages to confirm the drive is safe prior to servicing.Table 2.2 Periodic Inspection ChecklistInspection Area Inspection Points Corrective Action CheckedMain Circuit Periodic InspectionGeneral• Inspect equipment for discoloration from overheatingor 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 dust collection oncomponents.• Inspect enclosure door seal if used.• Remove foreign particles and dust with a vacuumcleaner to avoid touching parts.• Replace components if cleaning is not possible.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 and Contactors• Inspect contactors and relays for excessive noiseduring operation.• Inspect coils for signs of overheating such as meltedor cracked insulation.• Check coil voltage for overvoltage or undervoltageconditions.• Replace damaged removable relays, contactors, orcircuit board.Electrolytic Capacitor• Inspect for leaking, discoloration, or cracks.• Check if the cap has come off, for any swelling, or ifthe sides have burst open.The drive has few serviceable parts and may requirecomplete drive replacement.Diode, IGBT(Power Transistor) Inspect for dust or other foreign material collected on thesurface. Remove foreign particles and dust with a vacuumcleaner to avoid touching parts.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.• Make sure all terminals have been properly tightened.• Tighten loose screws and replace damaged screwsor terminals.• If terminals are integral to a circuit board, thenboard or drive replacement may be required.Circuit Boards Check for any odor, discoloration, and rust. Make sureconnections are properly fastened and that no dust or oilmist has accumulated on the surface of the board.• Fix any loose connections.• If an antistatic cloth or vacuum plunger cannot beused, replace the board.• Do not use any solvents to clean the board.• Remove foreign particles and dust with a vacuumcleaner to avoid touching parts.The drive has few serviceable parts and may requirecomplete drive replacement.Cooling System Periodic InspectionCooling Fan,Circulation 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 174 forinformation on cleaning or replacing the fan.Heatsink Inspect for dust or other foreign material collected on thesurface. Remove foreign particles and dust with a vacuumcleaner to avoid touching parts.2.2 InspectionYASKAWA ELECTRIC SIEP C710636 10C Z1000U HVAC MATRIX Drive Programming Manual 1692 Periodic Inspection &Maintenance