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Chapter 8 Troubleshooting
8.1 Maintenance
8.1.1 Routine Maintenance
The inuence of the ambient temperature, humidity, dust and vibration will cause the aging
of the components inside the controller, which may cause potential faults or reduce the
service life of the controller. Therefore, it is necessary to carry out routine and periodic
maintenance.
Routine maintenance involves checking:
•
Whether abnormal noise exists during motor running
•
Whether the motor vibrates excessively
•
Whether the installation environment of the controller changes
•
Whether the cooling fan works properly
•
Whether the controller overheats
Routine cleaning involves:
•
Keep the controller clean all the time.
•
Remove the dust, especially metal powder on the surface of the controller, to prevent the
dust from entering the controller.
•
Clear the oil stain on the cooling fan of the controller.
8.1.2 Periodic Inspection
Perform periodic inspection on the items that are difcult to check during running. Periodic
inspection involves:
•
Check and clean the air lter periodically.
•
Check whether the screws become loose.
•
Check whether the controller is corroded.
•
Check whether the wiring terminals have arc signs.
•
Carry out the main circuit insulation test.
Before measuring the insulating resistance with megameter (500 VDC megameter
recommended), disconnect the main circuit from the controller. 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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