YASKAWA A1000 Series Quick Start Manual page 119

Recommended Periodic Inspection
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Table 55 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
Transistor) on 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.
• Check for any odor, discoloration, and rust. Make
sure connections are properly fastened and that no
Circuit Boards
dust or oil mist has accumulated on the surface of
the board.
YASKAWA ELECTRIC TOEP C710616 21C YASKAWA AC Drive - A1000 Quick Start Guide
Table 55 Periodic Inspection Checklist
Inspection Points
Main Circuit Periodic Inspection
Motor Periodic Inspection
Control Circuit Periodic Inspection
6 Periodic Inspection & Maintenance
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.
• Use dry air to clear away foreign matter. Use a
pressure of 39.2 × 10 to 58.8 × 10
4
kg cm 2 ).
• 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 over or under voltage
conditions.
• Replace damaged removable relays contactors
or circuit board.
• Minor discoloration may be acceptable.
• If discoloration exists check for loose
connections.
• The drive has few serviceable parts and may
require complete drive replacement.
• Use dry air to clear away foreign matter. Use a
pressure of 39.2 × 10 to 58.8 × 10
4
kg cm 2 ).
• 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.
• Fix any loose connections.
• If an antistatic cloth or vacuum plunger can't be
used, replace the board.
• Do not use any solvents to clean the board.
• Use dry air to clear away foreign matter. Use a
pressure of 39.2 × 10 to 58.8 × 10
4
kg cm 2 ).
• The drive has few serviceable parts and may
require complete drive replacement.
Checked
Pa (4 - 6
4
4 Pa (4 - 6
4 Pa (4 - 6
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