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If the frequency inverter is not in use immediately after purchased, and need to be temporarily stored
or long-term stored up, pls obey belowing rules:
1 Frequency inverter should be stored in the place with standard temperature range
、
fine ventilation
and no humidity
、
dust or metal dust.
2 If frequency inverter has not been put into use yet for more than 1 year, user should carry on
charging testing to restore the characteristic of the inner main circuit filter capacitor. During charging,
user can use the pressure regulator to elevate slowly the input voltage of the frequency inverter to the
rated input voltage. The charging time should be above 1-2 hours. At least test once every year as
narrated above.
3 Frequency inverters are not allowed to be carried out the pressure testing, otherwise, it will lead to
frequency inverter life lessening or damage. Before the insulation testing, user should use 500 MΩvolt
megger measures the frequency inverter. Its insulation resistance should not smaller than 4MΩ
When using the general ohmmeters to measure current, the current in the input end will has imbalance
phenomenon. Generally the difference within 50% is regular. If using general multimeter to measure
the output three-phase voltage, due to being limited by the carry wave frequency disturbance and
multimeter frequency response, the read data, which maybe inaccurate,can be for reference only.
In order to guarantee the frequency inverter stable operation, except for periodic maintenance, the
inner component which bears long-term mechanical wear should be periodic replaced---including the
cooling fan
、
main circuit filter capacitor for energy caching and exchange
、
printed circuit board. In
general continuous using, users can replace them according to below regulation. Also should
according to the concrete conditions such as the usage environment
、
load condition and frequency
inverter current situation.
Component name
Replace year criteria
Cooling fan
2—3 year
Filter capacitor
4—5 year
printed circuit board
8—10 year
