1-8
1-3 New Features
New features have been added to 3G3MV-Series models with 5.5-kW and 7.5-kW ca-
pacities (i.e., the 3G3MV-A2055/A2075/ A4055/A4075). These features are outlined
below and explained in detail in Chapter 6.
H New Features for 3G3MV-A2055/A2075/ A4055/A4075 only
D Enclosure Rating: Closed Wall-mounting Conforming to IP20/NEMA1
The 5.5-kW and 7.5-kW Inverters have closed wall-mounting specifications that conform to
IP20/NEMA1, so they can operate in an ambient temperature range of --10 to 40°C.
Note Tooperatethis Inverterwithinanambienttemperaturerange of --10 to50°C,removethetopand
bottom covers to convert it to a panel-mounting model (IP00).
D Default Settings Changed for V/f Patterns (Parameters: n011 to n017)
For 5.5-kW and 7.5-kW Inverters, two of the default settings have been changed. The default settings
forthemiddleoutputfrequencyvoltage(VC)(n015)and theminimumoutputfrequencyvoltage(VMIN
(n017) have both been changed to 10 V for 200-V-class models and to 20 V for 400-V-class models.
D Inverter Overheating Warning Input
(Parameters: n050 to n056; Fault Display: oH3)
AnInverteroverheatingwarning input has beenaddedasanew function thatcanbesetformulti-func-
tion inputs 1 to7 (n050 to n056). When this warningis input, an oH3fault (nonfatal error, please check
page 8-11) will be displayed. This input can be used for functionssuchasthermal contact connections
for peripheral overheating detection.
D Frequency Reference Loss Detection (Parameter: n064)
Whenthefrequencyisreferencedusinganalogfrequencyreferenceinputs(0to10V/4to20mA/0to20
mA), this function detects sudden changes in analog inputs as errors (disconnection, short circuit,
breakdown,etc.)andoutputsthefrequencyreferencelossoutputthatissetinmulti-functionoutputs1
to3(n057ton059).Afterthechangeisdetected,operationcontinuesat80%ofthefrequencyreference
prior to the change.
D Accumulated Operating Time (Monitor: U-13; Parameters: n087, n088)
ThisfunctioncalculatesandstoresinmemorytheInverter’saccumulatedpower-ONtimeorRUNtime.
Use it for checking and determining the maintenance schedule.
D Speed Search Adjustment (Parameters: n101, n102)
Afunctionhasbeenaddedforadjustingthespeedsearch.(Thespeedsearchisafunctionfordetecting
and smoothly controlling the speed of a free running motor.) The speed search operating time and
search level can be adjusted.
D Input Open-phase Detection
(Parameters: n166, n167; Fault Display: PF)
ThisfunctiondetectstheInverter’sinputpowersupplyopenphase.Openphasesaredetectedthrough
main circuit voltage fluctuations, so this function can also be used for detecting abnormal voltage fluc-
tuations in the input power supply voltage.
Overview Chapter 1
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