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6 Repair and maintenance
6.1 Routine maintenance
The influence of the ambient temperature, humidity, dust and vibration will cause the
aging of the devices in the Inverter, which may cause potential faults or reduce the service life
of the Inverter. Therefore, it is necessary to carry out routine and periodic maintenance.
Routine maintenance involves checking:
Item
Details
Measures
Terminal screws
Are they loose?
Tighten the screws.
Heat sink
Is it dusty?
Blow away the dust with 4
~
6kg/cm2 pressure
dry compressed air.
PCB
Is it dusty?
Blow away the dust with 4
~
6kg/cm2 pressure
dry compressed air.
Cooling fan
Is it noisy and with abnormal
oscillations?
Relace the cooling fan
Power
components
Is it dusty?
Blow away the dust with 4
~
6kg/cm2 pressure
dry compressed air.
DC bus aluminum
electrolytic
capacitor
Is it discoloured, with peculiar
smell or bubbles?
Relace the aluminum electrolytic capacitor
6.2 Replacement of vulnerable components
The vulnerable components of the Inverter are cooling fan and aluminum electrolytic
capacitor. Their service life is related to the operating environment and maintenance status.
Generally, the service life is shown as follows:
1.
Cooling fan: 3 years
2.
Aluminum electrolytic capacitor: 5 years.