2.7 Routine Repair and Maintenance of inverter
2.7.1 Routine Repair
The inuence of the ambient temperature, humidity, dust and vibration will cause the aging of
the devices in the inverter, which may cause potential fault of the inverter or reduce the service
life of the inverter. Therefore, it is necessary to carry out routine and periodical maintenance on
the inverter.
Routine inspection Items include:
Whether there is any abnormal change in the running sound of the motor; 1)
Whether the motor has vibration during the running; 2)
Whether there is any change to the installation environment of the inverter; 3)
Whether the inverter cooling fan works normally;4)
Whether the inverter has over temperature;5)
Routine cleaning:
The inverter shall be kept clean all the time.
The dust on the surface of the inverter shall be effectively removed, so as to prevent the dust
entering the inverter. Especially the metal dust is not allowed.
The oil stain on the inverter cooling fan shall be effectively removed.
2.7.2 Periodic Inspection
Please perform periodic inspection on the places where the inspection is a difcult thing.
Periodic inspection Items include:
Check and clean the air duct periodically; 1)
Check if the screws are loosened; 2)
Check if the inverter is corroded; 3)
Check if the wire connector has arc signs;4)
Main circuit insulation test 5)
Remainder: When using the megameter (DC 500V megameter recommended) to measure the
insulating resistance, the main circuit shall be disconnected with the inverter. Do not use the
insulating resistance meter to control the insulation of the circuit. It is not necessary to conduct
the high voltage test (which has been completed upon delivery).
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