YASKAWA L1000A Quick Start Manual page 146

6 Periodic Inspection & Maintenance
■ Recommended Periodic Inspection
Table 41 outlines the recommended periodic inspections for Yaskawa drive installations. Although periodic inspections
should generally be performed once a year, the drive may require more frequent inspection in harsh environments or with
rigorous use. Operating and environmental conditions, along with experience in each application, will determine the
actual inspection frequency 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.
Periodic Inspection
WARNING! Electrical Shock Hazard. Do not inspect, connect, or disconnect any wiring while the power is on. Failure to comply can
result in serious personal injury. Before servicing the drive, disconnect all power to the equipment. The internal capacitor remains
charged even after the power supply is turned off. After shutting off the power, wait for at least the amount of time specified on the drive
before touching any components.
Inspection Area
• Inspect equipment for discoloration from
overheating or deterioration.
• Inspect for damaged or deformed parts.
General
Inspect for dirt, foreign particles, or dust collection
on components.
• Inspect wiring and connections for discoloration,
Conductors and
damage, or heat stress.
Wiring
• Inspect wire insulation and shielding for wear.
Inspect terminals for stripped, damaged, or loose
Terminals
connections.
• Inspect contactors and relays for excessive noise
Relays and during operation.
Contactors • Inspect coils for signs of overheating such as
melted or cracked insulation.
Inspect for discoloration of heat stress on or around
Braking Resistors
resistors.
• Inspect for leaking, discoloration, or cracks.
Electrolytic
• Check if the cap has come off, for any swelling, or
Capacitor
if the sides have burst open.
Diode, IGBT (Power Inspect for dust or other foreign material collected on
Transistor) the surface.
Operation Check Check for increased vibration or abnormal noise.
• Inspect terminals for stripped, damaged, or loose
connections.
General
• Make sure all terminals have been properly
tightened.
144
Table 41 Periodic Inspection Checklist
Inspection Points
Main Circuit Periodic Inspection
Motor Periodic Inspection
Control Circuit Periodic Inspection
YASKAWA ELECTRIC TOEP C710616 38H YASKAWA AC Drive-L1000A Quick Start Guide
Corrective Action
• Replace damaged components as required.
• The drive has few serviceable parts and may
require complete drive replacement.
• Inspect enclosure door seal if used.
• Remove foreign particles and dust by sucking
them out with a vacuum cleaner to avoid
touching parts.
• Replace components if cleaning is not possible.
Repair or replace damaged wiring.
Tighten loose screws and replace damaged
screws or terminals.
• Check coil voltage for overvoltage or
undervoltage conditions.
• Replace damaged removable relays contactors
or circuit board.
• Minor discoloration may be acceptable.
• Check for loose connections if discoloration
exists.
The drive has few serviceable parts and may
require complete drive replacement.
Remove foreign particles and dust by sucking
them out with a vacuum cleaner to avoid touching
parts.
Stop the motor and contact qualified maintenance
personnel as required.
• 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.
Checked