7.2 Inspection Table 7.2 Periodic Inspection Checklist Note: Periodic inspections should be performed every one or two years. The drive, however, may require more frequent inspection due to poor environments or rigorous use. Periodic Inspection & Maintenance 7 SIEP C710606 33A OYMC AC Drive – J1000 User Manual 143 Inspection Area Inspection Points Corrective Action Checked Main Circuit Periodic Inspection General • Inspect equipment for discoloration from overheating or deterioration. • Inspect for damaged or deformed parts. • Replace damaged components as required. • The drive has few serviceable parts and may require complete drive replacement.
• Inspect for dirt, foreign particles, or dust collection on components. • Inspect enclosure door seal if present. Replace components if cleaning is not possible. • Use dry air to clear away foreign matter. Use a pressure of: 39.2 x 104 to 58.8 x 104 Pa (4 - 6 kg •cm2). Conductors and Wiring • 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 loose connections. • Tighten loose screws and replace damaged screws or terminals. Relays and Contactors • Inspect contactors and relays for excessive noise during operation.
• Inspect coils for signs of overheating such as melted or cracked insulation. • Check coil voltage for over or under voltage conditions. • Replace damaged removable relays contactors or circuit board. Braking Resistors • Inspect for discoloration of heat stress on or around resistors. • Minor discoloration may be acceptable. • If discoloration exists check for loose connections. Control Circuit Periodic Inspection General • Inspect terminals for stripped, damaged or loose connections. • Check for tightness. • Tighten loose screws and replace damaged screws or terminals. • If terminals are integral to a circuit board then board or drive replacement may be required.
LED Periodic Inspection LEDs • Make sure the LED lights correctly. • Inspect for dust or other foreign material that may have collected on surrounding components. • Contact your OYMC representative if there is any trouble with the LED or keypad. • Clean the LED. Cooling System Periodic Inspection Cooling 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 145 for information on cleaning or replacing the cooling fan. Heatsink • Inspect for dust or other foreign material collected on the surface. • Use dry air to clear away foreign matter.
• Use a pressure of 39.2 x 104 to 58.8 x 104 Pa (4 - 6 kg•cm2). Air Duct • Inspect air intake and exhaust openings. They must be free from obstruction and properly installed. • Visually inspect the area. • Clear obstructions and clean air duct as required. Motor Periodic Inspection Operation Check • Check for increased vibration or abnormal noise. • Stop the motor and contact qualified maintenance personnel as required.