the high voltage test (which has been completed upon delivery).
2.6.3 Replacement of Vulnerable Parts for Inverter
The vulnerable parts of the inverter include cooling fan and filter electrolytic
capacitor, whose life depends on the operating environment and maintenance status.
Common service life:
The user can determine the term for replacement according to the running time.
1) Cooling fan
Possible causes for damage: bearing wearing and blade aging.
Criteria: Whether there is crack on the blade and whether there is abnormal
vibration noise upon startup.
2) Possible causes for damage of filter electrolytic capacitor: Poor input source
quality, high ambient temperature, frequent load jumping and burning electrolyte.
Criteria: Whether there is liquid leakage, whether the safe valve has projected,
measure the static capacitance, and measure the insulating resistance.
2.6.4 Storage of Inverter
Attention shall be paid to the following points for the temporary and long-term
storage of the inverter:
1) Place the inverter back into the packing box following the original package;
2) Long-term storage will degrade the electrolytic capacitor. The product shall be
powered up once every 2 years, and the power-up time shall be no less than 5
hours. The input voltage shall be increased slowly to the rated value with the
regulator.
Part name Life time
Fan 2 to 3 years
Electrolytic
capacitor
4 to 5 years
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