Maintenance and
Troubleshooting
MD380 User Manual
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Chapter 9 Maintenance and Troubleshooting
9.1 Routine Repair and Maintenance of the MD380
9.1.1 Routine Maintenance
The inuence of the ambient temperature, humidity, dust and vibration will cause the 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:
• Whether the motor sounds abnormally during running
• Whether the motor vibrates excessively during running
• Whether the installation environment of the AC drive changes.
• Whether the AC drive's cooling fan works normally
• Whether the AC drive overheats
Routine cleaning involves:
• Keep the AC drive clean all the time.
• 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.
9.1.2 Periodic Inspection
Perform periodic inspection in places where inspection is difcult.
Periodic inspection involves:
Check and clean the air duct periodically.
Check whether the screws become loose.
Check whether the AC drive is corroded.
Check whether the wiring terminals show signs of arcing;
Main circuit insulation test
Before measuring the 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 need not be performed again because
it has been completed before delivery.
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