MD280/MD280N User Manual Product Information
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meter to control the insulation of the circuit. It is not necessary to conduct
the high voltage test (which has been completed upon delivery).
2.7.3 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:
Part name Life time
Fan 2 to 3 years
Electrolytic
capacitor
4 to 5 years
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.
2.7.4 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.
2.8 Instructions on Warranty of Inverter
Free warranty only applies to the inverter itself.
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