SUNFAR C300 85
C300 series of non-sensor current vector-control inverter manual
input voltage Moving-coil voltmeter
Output voltage Rectifier-type voltmeter
O/I current Tong-type ammeter
8.2 Damageable parts maintenance
Some cells in inverter are worn out or the performance descends in the process of
usage process, in order to ensure the stable running of inverter, so the inverter
needs to do the preventative maintenance or replace the part if necessary
Filter capacitor⑴
Pulse current in main circuit will take effect on the performance of aluminum
electrolytic filter capacitor, and the degree of effect has relation with the ambient
temperature and usage condition. In normal condition, the electrolytic capacitor of
inverter should be replaced at 4 to 5 years.
When the electrolytic capacitor leaks out, safety valve falls out or main block of
capacitor expands, the corresponding parts should be replaced immediately.
Cooling fan⑵
The lifetime of all the cooling fans in the inverter is about 15000 hours (that inverter
is used continuously about two years). If the fan occurs the abnormal noise or
vibration, it should be replaced immediately.
8.3 Storage
If the inverter don’t used for a long time, please notice the following items:
⑴ To avoid storing the inverter at the environment with high-temperature，humidity,
vibration or metal dust, and ensure the well ventilation.
⑵ If the inverter is not used for a long time, it should be energized to resume the
capability of electrolyte capacitor once at 2 years，at the same time, check the
Inver⑴ ter has done the electric insulating experiment before leave-factory, so
user don’t need to do the withstand voltage test.
⑵ Do the insulation test to the inverter if necessary, all of I/O terminals must be
connected in short-circuit (R, S, T,L1,L2, U, V, W, P, P-, PB). Strictly
prohibited from doing the insulation test for the single terminal. Please use
500V Meg-ohmmeter to perform this test.
Control circuit can not be used the Meg⑶ -ohmmeter to test.
For insulation test to motor, the connection wire b⑷ etween motor and inverter
should be disassembled.
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