Omron Q2A Series Technical Manual page 307

Inspection Area
General
Conductors and Wiring
Terminal Block
Electromagnetic Contactors and Relays
Dynamic Braking Option
Electrolytic Capacitor
Diodes, IGBT (Power Transistor)
Inspection Area
Operation Check
Inspection Area
General
Circuit Boards
Inspection Area
Cooling Fans
Heatsink
Air Duct
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Table 8.2 Main Circuit Periodic Inspection Checklist
Inspection Points
• Examine equipment for discoloration from too
much heat or deterioration.
• Examine for damaged parts.
Examine for dirt, unwanted particles, or dust on
components.
• Examine wiring and connections for discoloration
or damage. Examine wiring and connections for
discoloration from too much heat.
• Examine wire insulation and shielding for
discoloration and wear.
Examine terminals for stripped, damaged, or loose
connections.
• Examine contactors and relays for too much noise
during operation.
• Examine coils for signs of too much heat, such as
melted or broken insulation.
Examine the insulation for discoloration from too
much heat.
• Examine for leaks, discoloration, or cracks.
• Check if the cap has come off, if there is swelling,
or if there are leaks from broken sides.
Examine for dust or other unwanted material collected
on the surface.
Table 8.3 Motor Periodic Inspection Checklist
Inspection Points
Check for increased vibration or unusual noise.
Table 8.4 Control Circuit Periodic Inspection Checklist
Inspection Points
• Examine terminals for stripped, damaged, or loose
connections.
• Make sure that all terminals have been correctly
tightened.
• 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.
Table 8.5 Cooling System Periodic Inspection Checklist
Inspection Points
• Check for unusual oscillation or unusual noise.
• Check for damaged or missing fan blades.
• Examine for dust or other unwanted material
collected on the surface.
• Examine for dirt.
Examine air intake, exhaust openings and make sure
that there are no unwanted materials on the surface.
Corrective Action
• 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 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.
Corrective Action
Stop the motor and contact approved maintenance
personnel as necessary.
Corrective Action
• 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.
• 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.
Corrective Action
Clean or replace the fans as necessary.
Use a vacuum cleaner to remove unwanted particles
and dust without touching the components.
Clear blockages and clean air duct as necessary.
8.2 Inspection
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