Hitachi RAS-8-FSNM - COMMISSIONING

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DSW4: Refrigerant Cycle Number setting
Setting is required
Setting before shipment
(Setting for the ten digit)
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DSW5: End terminal resistance
No setting is required
Setting before shipment
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DSW6: Height difference
Setting is required
Setting before shipment
The indoor unit is located higher than outdoor
unit (20 to 30 m)
Fine-tuning of heating capacity
10.5.2 PCB2
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DSW1: (On PCB2)
No setting is required
When set Nº1 pin to ON, the electric current
detection is canceled. Nº 1 pin should be set
back to OFF after electrical work.
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JP1~6: Jumper cable
JP1 With jumper cable JP4 Without jumper cable
JP2 With jumper cable JP5 With jumper cable
JP3 Without jumper cable JP6 With jumper cable
! CAUTION
Ifthepowersourceisopenphase,"05"willbedisplayedat7-segmenton
theoutdoorPCB,andthecompressorwillnotbeoperated.Inthiscase
checkfortheconnectionofpowersourceterminal.
11 COMMISSIONING
When installation is completed, perform test run according to the
following procedure, and hand over the system to the customer.
Perform test run regarding indoor units one by one in order, and
conrm that the electrical wiring and the refrigerant piping are
correctly connected.
Start the indoor units one by one in order to conrm that they
are correctly numbered.
! CAUTION
• Do not operate the system until all the check points have been
cleared.
aChecktoensurethattherefrigerantpipingandtransmission
betweenoutdoorunitandindoorunitsareconnectedtothesame
refrigerantcycle.Ifnot,itwillcauseanabnormaloperationanda
seriousaccident.
bChecktoensurethattheelectricalresistanceismorethan1
megohm,bymeasuringtheresistancebetweengroundandthe
terminaloftheelectricalparts.Ifnot,donotoperatethesystem
untiltheelectricalleakageisfoundandrepaired.
cChecktoensurethatthestopvalvesoftheoutdoorunitarefully
opened,andthenstartthesystem.
dChecktoensurethattheswitchonthemainpowersourcehas
beenONformorethan12hours,towarmthecompressoroilby
theoilheater.
eCheckthattherefrigerantpipingandtheelectricalwiring
conformtothesamesystem,andcheckthatthedipswitchsetting
oftherefrigerantcycleNº.(DSW4&RSW1[O.U.],DSW5&
RSW2[I.U.])andtheunitnumber(RSW)fortheindoorunitsapply
tothesystem.
Conrmthatthedipswitchsettingontheprintedcircuitboardof
theindoorunitsandtheoutdoorunitsarecorrect.Especially,pay
attentiontothesettingofliftbetweenindoorunitsandoutdoor
unit,therefrigerantNo.andtheendterminalresistance.
f Checktoensurethattheelectricalresistanceismorethan1
megohm,bymeasuringtheresistancebetweengroundandthe
terminaloftheelectricalparts.Ifnot,donotoperatethesystem
untiltheelectricalleakageisfoundandrepaired.Donotapplythe
voltageontheterminalsfortransmission1and2.
gChecktoensurethateachwire,L1,L2,L3andNiscorrectly
connectedatthepowersource.
Ifincorrectlyconnected,theunitwillnotoperateandtheremote
controlswitchwillindicatethealarmcode“05”.Inthiscase,check
andchangethephaseofthepowersourceaccordingtothe
attachedseatonthereversesideoftheservicecover.
hCheckthatthegasandliquidlinestopvalvearefullyopen.
Checkthearenutsarefullyclosed.
• FSNM series outdoor units does not operate within 4 hours after
powersupply(StoppageCoded1-22).Incaseofoperatingwithin4
hours,releasetheprotectioncontrolasfollows:
1 Supplypowertotheoutdoorunitandindoorunits.
COMMISSIONING
PMML0390B REV.0 - 11/2015 - P5416649
20