Specifications

 Chapter2SpecificationsandSelectionVFD‐G7SeriesFrequencyInverterOperationManual

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4)Whetherthecoolingfanofthedriveisworkingproperly.

5)WhethertheVFDisoverheating

Dailycleaning:

1)Reservethedriveinacleanstate.

2)Effectivelyremovethedustonthesurfaceoftheinvertertopreventdustenteringthe

insideoftheinverter,especiallythemetaldust.

3)Effectively

cleartheoilfromthecoolingfan.

2.8.2 Routine Checking

Check regularly the place which is difficult to check when the drive is running, routine

checkingitems: 

1)Checktheairduct,andregularlyclean.

2)Checkwhetherthescrewsareloose.

3)Checkwhetherthedriveiscorroded.

4)Checkwhethertheterminalshavearctraces.

5)Checkwhetherthe

maincircuitisinsulation.

☞Notes:WhenusingaDC500VMega‐Ohm‐Metertotestinsulatingresistance,pleasemake

sure the mian circuit and the frequency inverter is disconnected. please don't use the

insulation resistance meterto test the insulation of the control circuit.High voltage test is

unnecessary(ithas

alreadybeenconductedbeforedelivery).

2.8.3 Replacing of Quick-wearing Parts

The quick‐wearing parts of the frequency inverter mainly includes cooling fan and

electrolytic capacitors for filters. Their lifetime depends largely on their application

environmentandmaintenancecondition.Normally,lifetimeis:

Components Life

Fan 2~3 years

Electrolyte capacitor 4~5 years

Theusercandecidethereplaceagelimitaccordingtotherunningtime.

1.Coolingfan

Possiblecauseofdamages:wearofthebearing,agingofthefanvanes.