Chapter 8 Maintenance and Troubleshooting
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Chapter 8 Maintenance and Trouble-shooting
8.1 Maintenance of the AC Drive
8.1.1 Routine Maintenance
The inuence of the ambient temperature, humidity, dust and vibration will cause aging of the devices in the AC
drive, which may cause potential faults or reduce the service life of the AC drive. Therefore, it is necessary to carry
out routine and periodic maintenance.
Routine maintenance involves checking:
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Whether the motor sounds abnormally during running.
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Whether the motor vibrates excessively during running.
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Whether the installation environment of the AC drive changes.
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Whether the cooling fan of the AC drive works normally.
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Whether the AC drive overheats.
Routine cleaning involves:
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Keep the AC drive clean all the time.
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Remove the dust, especially metal powder on the surface of the AC drive, to prevent the dust from entering
the AC drive.
•
Clear the oil stain on the cooling fan of the AC drive.
8.1.2 Periodic Inspection
Perform periodic inspection in places where inspection is difcult.
Periodic inspection involves:
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Check and clean the air duct periodically.
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Check whether the screws become loose.
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Check whether the AC drive is corroded.
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Check whether the wiring terminals show signs of arcing.
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Carry out the main circuit insulation test.
Note: Before measuring insulating resistance with megameter (500 VDC megameter recommended), disconnect
the main circuit from the AC drive.
Do not use the insulating resistance meter to test the insulation of the control circuit. The high voltage test report
need not be performed again because it has been completed before delivery.