YASKAWA GA700 Technical Manual page 337

avoid performance deterioration and product failure. Copy this checklist and mark the "Checked" column after
each inspection.
DANGER! Electrical Shock Hazard. Do not perform inspections or wiring while the drive is energized. De-energize all devices
before carrying out any wiring or repair operations. Voltage will remain within the capacitors inside the drive even after the
power has been switched off. The Charge LED is extinguished once the DC bus voltage goes below 50 V DC. To prevent
electric shock, always wait for at least the amount of time indicated on the warning labels and confirm that all indicators are
OFF. Then, remove the front cover and terminal cover, measure the input power supply voltage and the DC bus voltage, and
make sure that the voltages have been lowered to safe levels. Failure to comply may result in death or serious injury.
Inspection
Inspection Points
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 or damage. Inspect
wiring and connections for
Conductors and
discoloration from overheating.
Wiring
• Inspect wire insulation, shielding or
discoloration for wear.
Inspect terminals for stripped, damaged,
Terminal Block
or loose connections.
• Inspect contactors and relays for
Electromagnetic
excessive noise during operation.
Contactors and
• Inspect coils for signs of overheating
Relays
such as melted or cracked insulation.
Dynamic Inspect the insulation material for
Braking Option discoloration from overheating.
• Inspect for leaking, discoloration, or
cracks.
Electrolytic
• Check if the cap has come off, if there
Capacitor
is any swelling, or the sides have
ruptured and are leaking.
Diodes, IGBT
Inspect for dust or other foreign material
(Power
collected on the surface.
Transistor)
Inspection
Inspection Points
Area
Operation Check for increased vibration or
Check abnormal noise.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Table 7.2 Main Circuit Periodic Inspection Checklist
• 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 with a vacuum cleaner to
avoid touching parts.
• Replace components if cleaning is not possible.
Repair or replace damaged wiring.
• Tighten loose screws.
• Replace damaged screws or terminals.
Note:
Hex screws for drive models 2056, 2070, 4031, and 4038
cannot be replaced.
• Check coil voltage for overvoltage or undervoltage
conditions.
• Replace damaged removable relays, contactors, or circuit
board.
If the option is discolored, check to make sure that the wiring
is not damaged. A small amount of discoloration is not
problematic.
The drive has few serviceable parts and may require complete
drive replacement.
Remove foreign particles and dust with a vacuum cleaner to
avoid touching parts.
Table 7.3 Motor Periodic Inspection Checklist
Stop the motor and contact qualified maintenance personnel as
required.
Corrective Action
Corrective Action
7.2 Inspection
Checked
Checked
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