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Possible causes of damage: bearing wear and blade aging. Criteria: whether there is any crack in the fan
blade, whether there is abnormal vibration sound when starting the machine, etc.
2) Filter electrolytic capacitor
Possible causes of damage: poor quality of input power supply, high ambient temperature, frequent load jump
and electrolyte aging. Criteria: leakage of liquid, bulging of safety valve, determination of electrostatic capacitance,
determination of insulation resistance
3) Printed circuit board
Possible causes of damage: aging insulation, deterioration of devices, loose connectors.
Criteria: broken insulation, burning marks on board surface, poor contact of plug - ins.
7.2 Storage and storage
After the user purchases the frequency inverter, the following points must be paid attention to for temporary
storage and long-term storage:
When storing, try to pack it into the packing box of our Company according to the original packing.
It should be placed in a room with a temperature of - 25
℃
~ 65
℃
without moisture, dust, metal dust and good
ventilation.
Long - term storage will lead to deterioration of the electrolytic capacitor of the main circuit in the frequency
inverter. It must be guaranteed to be energized once within one year to ensure that the electrical characteristics
of the capacitor can be restored.
Do not carry out withstand voltage test on the frequency inverter at will, which will lead to reduced service life.
