7.2 Inspection
402 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Table 7.4 Control Circuit Periodic Inspection Checklist
Inspection
Area
Inspection Points Corrective Action Checked
General
• Examine terminals for stripped,
damaged, or loose connections.
• Make sure that all terminals have been
correctly tightened.
• Tighten loose screws.
• Replace damaged screws or terminals.
• If terminals are integral to a circuit board, it could be
necessary to replace the control board or the drive.
Circuit Boards
• Check for odor, discoloration, or rust.
• Make sure that all connections are
correctly fastened.
• Make sure that the surface of the
circuit board does not have dust or oil
mist.
• Tighten loose connections.
• 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.
• Do not use solvents to clean the board.
• The drive does not have many serviceable parts and it could
be necessary to replace the drive.
Table 7.5 Cooling System Periodic Inspection Checklist
Inspection
Area
Inspection Points Corrective Action Checked
Cooling Fans
• Check for unusual oscillation or
unusual noise.
• Check for damaged or missing fan
blades.
Clean or replace the fans as necessary.
Heatsink
• Examine for dust or other unwanted
material collected on the surface.
• Examine for dirt.
Use a vacuum cleaner to remove unwanted particles and dust
without touching the components.
Air Duct
Examine air intake, exhaust openings and
make sure that there are no unwanted
materials on the surface.
Clear blockages and clean air duct as necessary.
Table 7.6 Keypad Periodic Inspection Checklist
Inspection
Area
Inspection Points Corrective Action Checked
General
• Make sure that the keypad shows the
data correctly.
• Examine for dust or other unwanted
material that collected on components
in the area.
• If you have problems with the display or the keys, contact
Yaskawa or your nearest sales representative.
• Clean the keypad.
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