Table 7.2 Periodic Inspection Checklist
Inspection Area Inspection Points Corrective Action Checked
Main Circuit Periodic Inspection
General
• Overall check of the main power circuit and
ground terminals
Take appropriate actions (e.g., tightening loose
connections).
• 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.
• Remove foreign particles and dust with a vacuum
cleaner to avoid touching parts.
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.
Motor Periodic Inspection
Operation Check • Check for increased vibration or abnormal noise.
• Stop the motor and contact qualified maintenance
personnel as required.
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.
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 296 for
information on cleaning or replacing the cooling fan.
Heatsink
• Inspect for dust or other foreign material
collected on the surface.
• Remove foreign particles and dust with a vacuum
cleaner to avoid touching parts.
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.
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 Yaskawa representative if there is any
trouble 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 to
poor environments or rigorous use.
7.2 Inspection
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
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Periodic Inspection &
Maintenance
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