YASKAWA GA700 Technical Manual page 401

experience with the application to select the correct inspection frequency for each drive installation. Periodic
inspections will help to prevent performance deterioration and product failure. Make a copy of this checklist and
put a check mark in the "Checked" column after each inspection.
DANGER! Electrical Shock Hazard. Do not examine, connect, or disconnect wiring on an energized drive. Before servicing,
disconnect all power to the equipment and wait for the time specified on the warning label at a minimum. The internal capacitor
stays charged after the drive is de-energized. The charge indicator LED extinguishes when the DC bus voltage decreases
below 50 Vdc. When all indicators are OFF, remove the covers before measuring for dangerous voltages to make sure that the
drive is safe. Failure to obey will cause death or serious injury.
Inspection
Inspection Points
Area
• Examine equipment for discoloration
from too much heat or deterioration.
• Examine for damaged parts.
General
Examine for dirt, unwanted particles, or
dust on components.
• Examine wiring and connections for
discoloration or damage. Examine
wiring and connections for
Conductors and
discoloration from too much heat.
Wiring
• Examine wire insulation and shielding
for discoloration and wear.
Terminal Block Examine terminals for stripped,
damaged, or loose connections.
• Examine contactors and relays for too
much noise during operation.
Electromagnetic
Contactors and
• Examine coils for signs of too much
Relays
heat, such as melted or broken
insulation.
Dynamic Examine the insulation for discoloration
Braking Option from too much heat.
• Examine for leaks, discoloration, or
cracks.
Electrolytic
• Check if the cap has come off, if there
Capacitor
is swelling, or if there are leaks from
broken sides.
Diodes, IGBT
Examine for dust or other unwanted
(Power
material collected on the surface.
Transistor)
Inspection
Inspection Points
Area
Operation Check for increased vibration or unusual
Check noise.
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Table 7.2 Main Circuit Periodic Inspection Checklist
• Replace damaged components as necessary.
• The drive does not have many serviceable parts and it could
be necessary to replace the drive.
• Examine enclosure door seal.
• Use a vacuum cleaner to remove unwanted particles and
dust without touching the components.
• If you cannot remove unwanted particles and dust with a
vacuum cleaner, replace the components.
Repair or replace damaged wiring.
• Tighten loose screws.
• Replace damaged screws or terminals.
Note:
On drive models, 2056, 2070, 4031, and 4038, you cannot
replace the hex screws.
• Check coil voltage for overvoltage or undervoltage
conditions.
• Replace broken relays, contactors, or circuit boards that you
can remove.
If there is discoloration in the option, check to make sure that
the wiring is not damaged. A small quantity of discoloration is
not a problem.
The drive does not have many serviceable parts and it could be
necessary to replace the drive.
• Use a vacuum cleaner to remove unwanted particles and
dust without touching the components.
• If you cannot remove unwanted particles and dust with a
vacuum cleaner, replace the components.
Table 7.3 Motor Periodic Inspection Checklist
Stop the motor and contact approved maintenance personnel as
necessary.
Corrective Action
Corrective Action
7.2 Inspection
Checked
Checked
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