Mitsubishi Electric MXZ 4C80VA, MXZ 5C100VA split-type air conditioner Installation Manual

Mitsubishi Electric MXZ-5C100VA is a split-type air conditioner designed for efficient and comfortable climate control in residential and commercial spaces. With its powerful cooling and heating capabilities, it ensures year-round comfort by maintaining the desired temperature in your rooms. The unit features advanced inverter technology that adjusts the compressor speed to match the cooling or heating demand, resulting in energy savings and quieter operation.

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Split-type Air-Conditioner
MXZ-4C80VA
MXZ-5C100VA
Installation Manual
ForINSTALLER
• Thismanualonlydescribestheinstallationofoutdoorunit.
Wheninstallingtheindoorunit,refertotheinstallationmanualofindoorunit.
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English
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ENGLISH
CONTENTS
. BEFOREINSTALLATION............................................................ 2. OUTDOORUNITINSTALLATION............................................... 4
3. FLARINGWORKANDPIPECONNECTION............................... 5
4. PURGINGPROCEDURES,LEAKTEST,ANDTESTRUN......... 5
5. RELOCATIONANDMAINTENANCE.......................................... 7
Required Tools for Installation
Phillipsscrewdriver
FlaretoolforR40A
Level
GaugemanifoldforR40A
Scale
VacuumpumpforR40A
Utilityknifeorscissors
ChargehoseforR40A
Torquewrench
Pipecutterwithreamer
Wrench(orspanner)
4mmhexagonalwrench
1. BEFORE INSTALLATION
1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
• Besuretoread“THEFOLLOWINGSHOULDALWAYSBEOBSERVEDFORSAFETY”beforeinstallingtheairconditioner.
• Besuretoobservethewarningsandcautionsspecifiedhereastheyincludeimportantitemsrelatedtosafety.
• Afterreadingthismanual,besuretokeepittogetherwiththeOPERATINGINSTRUCTIONSforfuturereference.
WARNING
(Couldleadtodeath,seriousinjury,etc.)
n Do not install the unit by yourself (user).
Incompleteinstallationcouldcausefireorelectricshock,injuryduetothe
unitfalling,orleakageofwater.Consultthedealerfromwhomyoupurchasedtheunitoraqualifiedinstaller.
n Perform the installation securely referring to the installation manual.
Incompleteinstallationcouldcausefireorelectricshock,injuryduetothe
unitfalling,orleakageofwater.
n When installing the unit, use appropriate protective equipment and
tools for safety.
Failuretodosocouldcauseinjury.
n Install the unit securely in a place which can bear the weight of the unit.
If the installation location cannot bear the weight of the unit, the unit
couldfallcausinginjury.
n Perform electrical work according to the installation manual and be
sure to use an exclusive circuit. Do not connect other electrical appliances to the circuit.
If the capacity of the power circuit is insufficient or there is incomplete
electricalwork,itcouldresultinafireoranelectricshock.
n Do not damage the wires by applying excessive pressure with parts
or screws.
Damagedwirescouldcausefire.
n Be sure to cut off the main power in case of setting up the indoor P.C.
board or wiring works.
Failuretodosocouldcauseelectricshock.
n Usethespecifiedwirestoconnecttheindoorandoutdoorunitssecurelyandattachthewiresfirmlytotheterminalblockconnecting
sections so the stress of the wires is not applied to the sections.
Incompleteconnectingandsecuringcouldcausefire.
n Donotinstalltheunitinaplacewhereinflammablegasmayleak.
Ifgasleaksandaccumulatesintheareaaroundtheunit,itcouldcause
anexplosion.
n Do not use intermediate connection of the power cord or the extension cord and do not connect many devices to one AC outlet.
Itcouldcauseafireoranelectricshockduetodefectivecontact,defectiveinsulation,exceedingthepermissiblecurrent,etc.
n Besuretousethepartsprovidedorspecifiedpartsfortheinstallation work.
Theuseofdefectivepartscouldcauseaninjuryorleakageofwaterdue
toafire,anelectricshock,theunitfalling,etc.
n When plugging the power supply plug into the outlet, make sure
that there is no dust, clogging, or loose parts in both the outlet and
the plug. Make sure that the power supply plug is pushed completely into the outlet.
Ifthereisdust,clogging,orloosepartsonthepowersupplyplugorthe
outlet,itcouldcauseelectricshockorfire.Ifloosepartsarefoundonthe
powersupplyplug,replaceit.
CAUTION
n Attach the electrical cover to the indoor unit and the service panel
to the outdoor unit securely.
Iftheelectricalcoveroftheindoorunitand/ortheservicepanelofthe
outdoor unit are not attached securely, it could result in a fire or an
electricshockduetodust,water,etc.
n When installing, relocating, or servicing the unit, make sure that
no substance other than the specified refrigerant (R410A) enters
the refrigerant circuit.
Any presence of foreign substance such as air can cause abnormal
pressureriseandmayresultinexplosionorinjury.Theuseofanyrefrigerantotherthanthatspecifiedforthesystemwillcausemechanical
failure, system malfunction, or unit breakdown. In the worst case, this
couldleadtoaseriousimpedimenttosecuringproductsafety.
n Do not discharge the refrigerant into the atmosphere. If refrigerant
leaks during installation, ventilate the room.
Ifrefrigerantcomesincontactwithafire,harmfulgascouldbegenerated.
Refrigerantleakagemaycausesuffocation.Ventilatetheroom.
n Check that the refrigerant gas does not leak after installation has
been completed.
Ifrefrigerantgasleaksindoors,andcomesintocontactwiththeflame
of a fan heater, space heater, stove, etc., harmful substances will be
generated.
n Use appropriate tools and piping materials for installation.
ThepressureofR40Ais.6timesmorethanR22.Notusingappropriatetoolsormaterialsandincompleteinstallationcouldcausethepipes
toburstorinjury.
n When pumping down the refrigerant, stop the compressor before
disconnecting the refrigerant pipes.
If the refrigerant pipes are disconnected while the compressor is runningandthestopvalveisopen,aircouldbedrawninandthepressure
in the refrigeration cycle could become abnormally high. This could
causethepipestoburstorinjury.
n When installing the unit, securely connect the refrigerant pipes
before starting the compressor.
Ifthecompressorisstartedbeforetherefrigerantpipesareconnected
andwhenthestopvalveisopen,aircouldbedrawninandthepressure in the refrigeration cycle could become abnormally high. This
couldcausethepipestoburstorinjury.
n Fastenaflarenutwithatorquewrenchasspecifiedinthismanual.
Iffastenedtootight,aflarenutmaybreakafteralongperiodandcause
refrigerantleakage.
n The unit shall be installed in accordance with national wiring regulations.
n Earth the unit correctly.
Donotconnecttheearthtoagaspipe,waterpipe,lightningrodortelephoneearth.Defectiveearthingcouldcauseelectricshock.
(Couldleadtoseriousinjuryinparticularenvironmentswhenoperatedincorrectly.)
n Install an earth leakage breaker depending on the installation place.
Ifanearthleakagebreakerisnotinstalled,itcouldcauseelectricshock.
n Perform the drainage/piping work securely according to the installation manual.
Ifthereisdefectinthedrainage/pipingwork,watercoulddropfromthe
unit,soakinganddamaginghouseholdgoods.
n Donottouchtheairinletorthealuminumfinsoftheoutdoorunit.
Thiscouldcauseinjury.
n Do not install the outdoor unit where small animals may live.
If small animals enter and touch the electric parts inside the unit, it
could cause a malfunction, smoke emission, or fire. Also, advise user
tokeeptheareaaroundtheunitclean.
1-2. SPECIFICATIONS
Powersupply*
Model
MXZ-4C80VA
MXZ-5C00VA
Wirespecifications*2
Pipelengthandheightdifference*3,*4,*5,*6,*7,*8
Max.no.ofbends
Max.pipelength
Rated Fre- Breaker
RefrigerantadjustIndoor/outdoor
Max.height
perindoorunit/
Powersupply
perindoorunit/
mentA*0
Voltage quency capacity
connectingwire
difference*9
formultisystem
formulti-system
25m/70m
25/70
4-core
2
230V 50Hz
25A 3-core2.5mm
5m
20g/m
.0/.5mm2
25m/80m
25/80
* Connect to the power switch which has a gap of 3 mm or more when
opentointerruptthesourcepowerphase.(Whenthepowerswitchisshut
off,itmustinterruptallphases.)
*2 Use wires in conformity with design 60245 IEC 57. Use the indoor/outdoorconnectingwireinconformitywiththewirespecificationsspecifiedin
theinstallationmanualoftheindoorunit.
*3 Neverusepipeswiththicknesslessthanspecified.Thepressureresistancewillbeinsufficient.
*4 Useacopperpipeoracopper-alloyseamlesspipe.
*5 Becarefulnottocrushorbendthepipeduringpipebending.
*6 Refrigerantpipebendingradiusmustbe00mmormore.
*7 Insulationmaterial:Heatresistingfoamplastic0.045specificgravity
*8 Besuretousetheinsulationofspecifiedthickness.Excessivethickness
may cause incorrect installation of the indoor unit and insufficient thicknessmaycausedewdrippage.
*9 Iftheoutdoorunitisinstalledhigherthantheindoorunit,max.height
differenceisreducedto0m.
*0Ifpipelengthexceeds40m,additionalrefrigerant(R40A)chargeisrequired.(Noadditionalchargeisrequiredforpipelengthlessthan40m.)
Additionalrefrigerant=A&times;(pipelength(m)-40)
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1-3. SELECTING OPTIONAL DIFFERENT-DIAMETER JOINTS
Ifthediameterofconnectionpipedoesnotmatchtheportsizeofoutdoorunit,useoptionaldifferent-diameterjointsaccordingtothefollowingtable.
(Unit:mm(inch))
MXZ4C80VA
Portsizeofoutdoorunit
MXZLiquid/Gas
5C00VA
AUNIT
6.35(/4)/2.7(/2)
B-DUNIT B-EUNIT
6.35(/4)/9.52(3/8)
Optionaldifferent-diameterjoints(portsizeofoutdoorunit→diameterofconnectionpipe)
6.35(/4)→9.52(3/8):PAC-493PI
9.52(3/8)→2.7(/2):MAC-454JP
9.52(3/8)→5.88(5/8):PAC-SG76RJ
2.7(/2)→9.52(3/8):MAC-A455JP
2.7(/2)→5.88(5/8):MAC-A456JP
Refertotheinstallationmanualofindoorunitforthediameterofconnectionpipeofindoorunit.
1-4. SELECTING THE INSTALLATION LOCATION
•
•
•
•
•
Whereitisnotexposedtostrongwind.
Whereairflowisgoodanddustless.
Whererainordirectsunshinecanbeavoidedasmuchaspossible.
Whereneighboursarenotannoyedbyoperationsoundorhotair.
Whererigidwallorsupportisavailabletopreventtheincreaseofoperationsoundorvibration.
• Wherethereisnoriskofcombustiblegasleakage.
• Wheninstallingtheunit,besuretosecuretheunitlegs.
• Whereitisatleast3mawayfromtheantennaofTVsetorradio.OperationoftheairconditionermayinterferewithradioorTVreceptionin
areaswherereceptionisweak.Anamplifiermayberequiredfortheaffecteddevice.
• Installtheunithorizontally.
• Please install it in an area not affected by snowfall or blowing snow.
Inareaswithheavysnow,pleaseinstallacanopy,apedestaland/or
somebaffleboards.
Note:
It is advisable to make a piping loop near outdoor unit so as to reduce
vibrationtransmittedfromthere.
FREE SPACE REQUIRED AROUND OUTDOOR UNIT
1. Obstacles above
When there is no obstacle in front
and on the sides of the unit, it is allowed to install the unit where an
obstacle is above the unit only if the 500ormore
spaceshowninthefigureisprovided.
00ormore
Note:
Whenoperatingtheairconditionerinlowoutsidetemperature,besure
tofollowtheinstructionsdescribedbelow.
• Neverinstalltheoutdoorunitinaplacewhereitsairinlet/outletside
maybeexposeddirectlytowind.
• Topreventexposuretowind,installtheoutdoorunitwithitsairinlet
sidefacingthewall.
• Topreventexposuretowind,itisrecommendedtoinstallabaffle
boardontheairoutletsideoftheoutdoorunit.
Avoidthefollowingplacesforinstallationwhereairconditionertrouble
isliabletooccur.
• Whereflammablegascouldleak.
• Wherethereismuchmachineoil.
• Saltyplacessuchastheseaside.
• Wheresulfidegasisgeneratedsuchasahotspring.
• Wherethereishigh-frequencyorwirelessequipment.
• WherethereisemissionofhighlevelsofVOCs,includingphthalate
compounds,formaldehyde,etc.,whichmaycausechemicalcracking.
2. Front (blowing) side open
As long as space indicated
in the figure is provided, it
is allowed to install the unit
where obstacles are behind
and on the sides of the unit.
(Noobstacleabovetheunit)
200ormore
350ormore
00ormore
3. Obstacles in front (blowing) only
4. Obstacles in front and behind
Whenthereisanobstacleinfrontof
theunitasshowninthefigure,open
space above, behind, and on the
sidesoftheunitisrequired.
500ormore
Theunitcanbeusedbyattachinganoptionaloutdoor
blowingguide(MAC-856SG)
(butbothsidesandtopare
open).
00ormore
500ormore
Blowingguide(MAC-856SG)
6. Service space
5. Obstacles in front, behind and on side(s)
• Wheninstallingtheunitinanareathatisenclosedwithwallssuch
asaverandah,besuretohaveenoughspaceasshownbelow.
Inthiscase,theairconditioningcapacityandpowerconsumption
mightdeteriorate.
• Whenthereisalackofairfloworthereisapossibilityofbecoming
shortcycle,installanoutletguideandmakesurethereisenough
spacebehindoftheunit.
• Wheninstallingtwoormoreunits,donotinstalltheunitsinfrontor
behindeachother.
Providespaceforserviceandmaintenanceasshowninthefigure.
Servicespace
00ormore
500ormore
200ormore
00ormore
350ormore
00ormore
500ormore
Heightoftheobstacleis200orless
500ormore
350ormore
350ormore
(Unit:mm)
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1-5. INSTALLATION DIAGRAM
Aftertheleaktest,applyinsulatingmaterialtightlysothatthereis
nogap.
When the piping is to be attachedtoawallcontainingmetals
(tin plated) or metal netting, use
a chemically treated wooden
piece 20 mm or thicker between
thewallandthepipingorwrap7
to 8 turns of insulation vinyl tape
aroundthepiping.
To use existing piping, perform
COOL operation for 30 minutes
andpumpdownbeforeremoving
the old air conditioner. Remake
flare according to the dimension
fornewrefrigerant.
Openasarule
Morethan500mm
ifthefrontandboth
sidesareopen
ACCESSORIES
Checkthefollowingpartsbeforeinstallation.
() Drainsocket
(2) Draincap
PARTS TO BE PROVIDED AT YOUR SITE
(A)
(B)
(C)
(D)
(E)
Powersupplycord*
Indoor/outdoorunitconnectingwire*
Extensionpipe
Wallholecover
Pipingtape
Extensiondrainhose
(F) (orsoftPVChose,5mminner
diameterorhardPVCpipeVP6)
(G) Refrigerationoil
Morethan00mm
Morethan200mmifthereare
obstaclestobothsides
Morethan
00mm
2
(H)
(I)
(J)
(K)
Putty
Pipefixingband
Fixingscrewfor(I)
Wallholesleeve
SoftPVChose,25mminnerdi(L) ameterorhardPVCpipeVP25for
drainsocket()
Little
amount
2to7
2to7
* Note:
Place indoor/outdoor unit connecting wire (B) and
power supply cord (A) at least m away from the
TVantennawire.
Openasarule
Morethan500mmiftheback,
bothsidesandtopareopen
Morethan350mm
The“Q’ty”for(B)to(K)intheabovetableisquantitytobeusedperindoorunit.
IMPORTANT NOTES
TocomplywiththerequirementsofAustralianstandardAS/NZS3000electricalinstallations(wiring
rules),theelectricalwiringrequiredbetweentheindoorandoutdoorunitsmustbeinstalledbya
licencedelectricalcontractor.
Unitsshouldbeinstalledbylicensedcontractoraccordingtolocalcoderequirements.
Outdoor unit installation
900mm
200
mm
500mm
2-U-shapenotchedholes
(BaseboltM0)
387mm
320mm
Airinlet
355mm
Airinlet
Airoutlet
2-2mm&times;36mm
ovalholes(BaseboltM0)
1-6. DRAIN PIPING FOR OUTDOOR UNIT
Pleaseperformthedrainpipingworkonlywhendrainingfromoneplace.
)Chooseoneholetodischargedrainandinstallthedrainsocket()tothehole.
2)Closetherestoftheholeswiththedraincaps(2).
3)ConnectthesoftPVChose(L)of25mmintheinsidediameteronthemarketwiththedrainsocket()andleaddrain.
Note:
Installtheunithorizontally.
Donotusethedrainsocket()andthedraincaps(2)inthecoldregions.Drainmayfreezeanditmakesthefanstop.
Theoutdoorunitproducescondensateduringtheheatingoperation.Selecttheinstallationplacetoensuretopreventtheoutdoorunitand/orthegrounds
frombeingwetbydrainwaterordamagedbyfrozendrainwater.
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2. OUTDOOR UNIT INSTALLATION
2-1. INSTALLING THE UNIT
•
•
•
•
Besuretofixtheunit’slegswithboltswheninstallingit.
Besuretoinstalltheunitfirmlytoensurethatitdoesnotfallbyanearthquakeoragust.
Refertothefigureintherightforconcretefoundation.
Donotusethedrainsocketandthedraincapsinthecoldregion.
Drainmayfreezeanditmakesthefanstop.
Anchorleg
25orless
Fixherewith
M0bolts.
Anchorbothlength
Anchorbothpitch
Makethesetting
depthdeeper.
(Unit:mm)
Makewithwider.
2-2. CONNECTING WIRES FOR OUTDOOR UNIT
)Removetheservicepanel.
2)Loosen terminal screw, and connect indoor/outdoor unit connecting
wire(B)fromtheindoorunitcorrectlyontheterminalblock.Becareful
nottomakemis-wiring.Fixthewiretotheterminalblocksecurelyso
thatnopartofitscoreisappeared,andnoexternalforceisconveyed
totheconnectingsectionoftheterminalblock.
3)Firmlytightentheterminalscrewstopreventthemfromloosening.Aftertightening,pullthewireslightlytoconfirmthattheydonotmove.
4)Perform2)and3)foreachindoorunit.
5)Connectpowersupplycord(A).
6)Fixindoor/outdoorunitconnectingwire(B)andpowersupplycord(A)
withthecableclamps.
7)Closetheservicepanelsecurely.Makesurethat3-2.PIPECONNECTIONiscompleted.
• After making connections between both power supply cord (A) and
indoor/outdoorunitconnectingwire(B),besuretofixbothcableand
wirewithcableclamps.
Terminalblock
forpowersupply
Screws
Servicepanel
Powersupply
5C00VA
Cableclamp
Connectingorder
• Connect the terminal block in
followingorder.
A→B→C→D→E→P
Eunitisfor5C00VAonly
Terminalblockfor
indoor/outdoorunit
Indoor/outdoorunit
connectingwire
&lt;OUTDOORUNIT&gt;
Terminalblock
Terminalblockfor
powersupply
Terminalblock
5mm
35mm
Terminalblock
Terminalblock
&lt;INDOORUNIT&gt;
POWERSUPPLY
~/N230V50Hz
Leadwire
Eunitisfor5C00VAonly
• Besuretoattacheachscrewtoitscorrespondentterminalwhensecuringthecordand/orthewiretotheterminalblock.
• Makeearthwirealittlelongerthanothers.(Morethan35mm)
• Forfutureservicing,giveextralengthtotheconnectingwires.
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3. FLARING WORK AND PIPE CONNECTION
3-1. FLARING WORK
)Cutthecopperpipecorrectlywithpipecutter.(Fig.,2)
2)Completelyremoveallburrsfromthecutcrosssectionofpipe.(Fig.3)
• Aim the copper pipe downward while removing burrs to prevent
burrsfromdroppinginthepipe.
3)Removeflarenutsattachedtoindoorandoutdoorunits,thenputthem
onpipehavingcompletedburrremoval.(Notpossibletoputthemon
afterflaringwork.)
4)Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension
showninthetable.SelectAmmfromthetableaccordingtothetool
selected.
5)Check
• ComparetheflaredworkwithFig.6.
• Ifflareisnotedtobedefective,cutofftheflaredsectionanddoflaringworkagain.
A(mm)
Pipediameter Nut Clutch
Clutch Wingnut
(mm)
(mm) typetool typetool typetool
forR40A forR22
forR22
&oslash;6.35(/4”) 7
.5to2.0
&oslash;9.52(3/8”) 22
0to0.5 .0to.5
&oslash;2.7(/2”) 26
2.0to2.5
&oslash;5.88(5/8”) 29
Nogood
Good
Copper
pipe
TiltedUnevenBurred
Fig.
Fig.2
Flaringtool
Burr
Copperpipe
Sparereamer
Pipecutter
Tighteningtorque
Clutchtype
Wingnuttype
Fig.3
N•m
kgf•cm
3.7to7.7
34.3to4.2
49.0to56.4
73.5to78.4
40to80
350to420
500to575
750to800
Fig.4
Smoothall
around
Insideisshiningwithoutany
scratches.
Copperpipe
Die
Evenlength
allaround
Flarenut
3-2. PIPE CONNECTION
1)Apply a thin coat of refrigeration oil (G) to the flared ends of the pipes
andthepipeconnectionsoftheoutdoorunit.
2)Alignthecenterofthepipewiththatofthepipeconnectionsoftheoutdoorunit,thenhandtightentheflarenut3to4turns.
3)Tightentheflarenutwithatorquewrenchasspecifiedinthetable.
•Over-tighteningmaycausedamagetotheflarenut,resultinginrefrigerantleakage.
• Be sure to wrap insulation around the piping. Direct contact with the
barepipingmayresultinburnsorfrostbite.
Fig.5
Fig.6
WARNING
When installing the unit, securely
connect the refrigerant pipes before
starting the compressor.
3-3. INSULATION AND TAPING
)Coverpipingjointswithpipecover.
2)Foroutdoorunitside,surelyinsulateeverypipingincludingvalves.
3)Using piping tape (E), apply taping starting from the entry of outdoor
unit.
• Stop the end of piping tape (E) with tape (with adhesive agent attached).
• When piping have to be arranged through above ceiling, closet or
wherethetemperatureandhumidityarehigh,windadditionalcommerciallysoldinsulationtopreventcondensation.
CAUTION
When there are the ports which are
not used, make sure their nuts are
tightened securely.
4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN
4-1. PURGING PROCEDURES AND LEAK TEST
)Removeserviceportcapofstopvalveonthesideoftheoutdoorunit
gaspipe.(Thestopvalvesarefullyclosedandcoveredincapsintheir
initialstate.)
2)Connect gauge manifold valve and vacuum pump to service port of
stopvalveonthegaspipesideoftheoutdoorunit.
3)Runthevacuumpump.(Vacuumizeformorethan5minutes.)
4)Checkthevacuumwithgaugemanifoldvalve,thenclosegaugemanifoldvalve,andstopthevacuumpump.
5)Leaveasitisforoneortwominutes.Makesurethepointerofgauge
manifold valve remains in the same position. Confirm that pressure
gaugeshows-0.0MPa[Gauge](-760mmHg).
6)Removegaugemanifoldvalvequicklyfromserviceportofstopvalve.
7)Fullyopenallstopvalvesonthegaspipeandtheliquidpipe.Operatingwithoutfullyopeninglowerstheperformanceandthiscausestrouble.
8)Refer to -2., and charge the prescribed amount of refrigerant if
needed. Be sure to charge slowly with liquid refrigerant. Otherwise,
compositionoftherefrigerantinthesystemmaybechangedandaffectperformanceoftheairconditioner.
9)Tightencapofserviceporttoobtaintheinitialstatus.
0)Leaktest
Stopvalvecap
(Torque9.6to
29.4N•m,200
to300kgf•cm)
*4to5turns
*Close
Compoundpressure
–0.0MPa gauge(forR40A)
(–760mmHg)
Pressuregauge
(forR40A)
*Open
Stopvalve
forGAS Handle
Low
Hexagonalwrench
Gaugemanifold
valve(forR40A)
HandleHigh
Chargehose
(forR40A)
Serviceportcap
(Torque3.7to
7.7N•m,40to
80kgf•cm)
Stopvalve
forLIQUID
Precautionswhenusing
thecontrolvalve
A
Control
valve
Open
Vacuumpump
(forR40A)
Whenattachingthecontrolvalveto
theserviceport,valvecoremaydeformorloosenifexcesspressureis
applied.Thismaycausegasleak.
Whenattachingthecontrolvalveto
theserviceport,makesurethatthe
valvecoreisinclosedposition,and
then tighten partA. Do not tighten
partAorturnthebodywhenvalve
Chargehose
coreisinopenposition.
(forR40A)
Serviceport
Close
Body
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4-2. GAS CHARGE
Performgaschargetounit.
)Connectgascylindertotheserviceportofstopvalve.
2)Performairpurgeofthepipe(orhose)comingfromrefrigerantgascylinder.
3)Replenish specified amount of the refrigerant, while operating the air conditionerforcooling.
Note:
Incaseofaddingrefrigerant,complywiththequantityspecifiedfortherefrigeratingcycle.
CAUTION:
Whenchargingtherefrigerantsystemwithadditionalrefrigerant,besuretouse
liquid refrigerant.Adding gas refrigerant may change the composition of the
refrigerantinthesystemandaffectnormaloperationoftheairconditioner.Also,
chargetheliquidrefrigerantslowly,otherwisethecompressorwillbelocked.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with
warmwater(under40&deg;C)duringcoldseason.Butneverusenakedfireorsteam.
Stopvalve
Liquid
pipe
Union
Union
Indoor
unit
Union
Outdoor
unit
Union
Stopvalvewith
Gas
serviceport
pipe
Refrigerantgas
cylinder
operatingvalve
(forR40A)
Gaugemanifold
valve(forR40A)
*Eunitisfor
5C00VAonly.
Chargehose
(forR40A)
RefrigerantgascylinderforR40Awithsiphon
Refrigerant(liquid)
Electronicscaleforrefrigerantcharging
4-3. LOCKING THE OPERATION MODE OF THE AIR CONDITIONER (COOL, DRY, HEAT)
• Descriptionofthefunction:
With this function, once the operation mode is locked to either COOL/DRY
modeorHEATmode,theairconditioneroperatesinthatmodeonly.
* Changingthesettingisrequiredtoactivatethisfunction.Pleaseexplainabout
thisfunctiontoyourcustomersandaskthemwhethertheywanttouseit.
[How to lock the operation mode]
)Be sure toturnoffthemain power fortheairconditioner beforemaking the
setting.
2)Setthe“”ofSWontheoutdoorcontrollerboardtoONtoenablethisfunction.
3)TolocktheoperationmodeinCOOL/DRYmode,setthe“2”ofSWonthe
outdoorcontrollerboardtoOFF.TolocktheoperationinHEATmode,setthe
sameswitchtoON.
4)Turnonthemainpowerfortheairconditioner.
COOL/DRY
HEAT
4-4. LOWERING THE OPERATION NOISE OF THE OUTDOOR UNIT
• Descriptionofthefunction:
Withthisfunction,theoperatingnoiseoftheoutdoorunitcanbeloweredbyreducingtheoperationload,forexample,duringnighttimeinCOOLmode.
However,pleasenotethatthecoolingandheatingcapacitymaylowerifthisfunctionisactivated.
* Changingthesettingisrequiredtoactivatethisfunction.Pleaseexplainaboutthisfunctiontoyourcustomersandaskthemwhethertheywanttouseit.
[How to lower the operating noise]
)Besuretoturnoffthemainpowerfortheairconditionerbeforemakingthesetting.
2)Setthe“3”ofSWontheoutdoorcontrollerboardtoONtoenablethisfunction.
3)Turnonthemainpowerfortheairconditioner.
Lowertheoperatingnoise
4-5. CHANGING THE AMPERE LIMIT
• Descriptionofthefunction:
Withthisfunction,theamountofcurrentthatflowsintheoutdoorunitcanbechanged.
SW2
Note:
Usethisfunctiononlywhentheamountofcurrentexceedstheallowedvalue.
[How to change the ampere limit]
)Besuretoturnoffthemainpowerfortheairconditionerbeforemakingthesetting.
2)Makethesettingreferringtothetablebelow.
3)Turnonthemainpowerfortheairconditioner.
MXZ-5C00VA
MXZ-4C80VA
0.5A
0.5A
5.5A
5.5A
Factorysetting
Full
Factorysetting
Full
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4-6. TEST RUN
• Testrunsoftheindoorunitsshouldbeperformedindividually.Seetheinstallationmanualcomingwiththeindoorunit,andmakesurealltheunitsoperateproperly.
• Ifthetestrunwithalltheunitsisperformedatonce,possibleerroneousconnectionsoftherefrigerantpipesandtheindoor/outdoorunitconnectingwires
cannotbedetected.Thus,besuretoperformthetestrunonebyone.
About the restart protective mechanism
Oncethecompressorstops,therestartpreventivedeviceoperatessothecompressorwillnotoperatefor3minutestoprotecttheairconditioner.
Wiring/piping correction function
Thisunithasawiring/pipingcorrectionfunctionwhichcorrectswiringandpipingcombination.Whenthereispossibilityofincorrectwiringandpipingcombination,andconfirmingthecombinationisdifficult,usethisfunctiontodetectandcorrectthecombinationbyfollowingtheproceduresbelow.
Makesurethatthefollowingisdone.
• Powerissuppliedtotheunit.
• Stopvalvesareopen.
Note:
Duringdetection,theoperationoftheindoorunitiscontrolledbytheoutdoorunit.Duringdetection,theindoorunitautomaticallystopsoperation.Thisisnot
amalfunction.
Procedure
Pressthepiping/wiringcorrectionswitch(SW87)minuteormoreafterturningonthe
powersupply.
• Correctioncompletesin0to5minutes.Whenthecorrectioniscompleted,itsresult
isshownbyLEDindication.Detailsaredescribedinthefollowingtable.
• Tocancelthisfunctionduringitsoperation,pressthepiping/wiringcorrectionswitch
(SW87)again.
• Whenthecorrectioncompletedwithouterror,donotpressthepiping/wiringcorrection
switch(SW87)again.
LED indication during detection:
When the result was “cannot be corrected”, press the piping/wiring correction switch
(SW871)againtocancelthisfunction.Then,confirmthewiringandpipingcombination
inaconventionalmannerbyoperatingtheindoorunitsonebyone.
Result of piping/wiring correction function
• The operation is done while the power is supplied. Make sure not to contact parts
otherthantheswitch,includingtheP.C.board.Thismaycauseelectricshockorburn
byhotpartsandlivepartsaroundtheswitch.ContactingthelivepartsmaycauseP.C.
boarddamage.
• TopreventelectroniccontrolP.C.boarddamage,makesuretoperformstaticeliminationbeforeoperatingthisfunction.
(Red)
Lighted
LED
2(Yellow)
Lighted
3(Green)
Blinking
LED
(Red)
2(Yellow) 3(Green)
Lighted
Notlighted
Lighted
Blinking
Blinking
Blinking
Otherindications
• Thisfunctiondoesnotoperatewhentheoutsidetemperatureis0&deg;Corbelow.
Result
Completed
(Correctedsuccessfully)
Cannotbecorrected
Referto“SAFETYPRECAUTIONSWHENLED
FLASHES”locatedbehind
theservicepanel.
4-7. EXPLANATION TO THE USER
• UsingtheOPERATINGINSTRUCTIONS,explaintotheuserhowtousetheairconditioner(howtousetheremotecontroller,howtoremovetheairfilters,howtoremoveorputtheremotecontrollerintheremotecontrollerholder,howtoclean,precautionsforoperation,etc.).
• RecommendtheusertoreadtheOPERATINGINSTRUCTIONScarefully.
5. RELOCATION AND MAINTENANCE
5-1. PUMPING DOWN
Whenrelocatingordisposingoftheairconditioner,pumpdownthesystemfollowingtheprocedurebelowsothatnorefrigerantisreleasedintotheatmosphere.
)Connectthegaugemanifoldvalvetotheserviceportofthestopvalveonthegaspipesideoftheoutdoorunit.
2)Fullyclosethestopvalveontheliquidpipesideoftheoutdoorunit.
3)Closethestopvalveonthegaspipesideoftheoutdoorunitalmostcompletelysothatitcanbeeasilyclosedfullywhenthepressuregaugeshows0
MPa[Gauge](0kgf/cm2).
4)StarttheemergencyCOOLoperationonalltheindoorunits.
TostarttheemergencyoperationinCOOLmode,disconnectthepowersupplyplugand/orturnoffthebreaker.After5seconds,connectthepower
supplyplugand/orturnonthebreaker,andthenpresstheE.O.SWonce.(TheemergencyCOOLoperationcanbeperformedcontinuouslyforupto30
minutes.)
5)Fullyclosethestopvalveonthegaspipesideoftheoutdoorunitwhenthepressuregaugeshows0.05to0MPa[Gauge](approx.0.5to0kgf/cm2).
6)StoptheemergencyCOOLoperation.
PresstheE.O.SWseveraltimesuntilallLEDlampsturnoff.Refertooperatinginstructionsfordetails.
WARNING
When pumping down the refrigerant, stop the compressor before disconnecting
the refrigerant pipes. The compressor may burst if air etc. get into it.
HEADOFFICE:TOKYOBLDG.,2-7-3,MARUNOUCHI,CHIYODA-KU,TOKYO00-830,JAPAN
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Key features

Split-type air conditioners
Indoor and outdoor unit installation
Refrigerant charging
Wiring and piping
Safety features
Detailed instructions and diagrams
Test run procedures
Relocation and maintenance
Troubleshooting and error codes
Warranty information

Frequently asked questions

The maximum pipe length depends on the model. For the MXZ 4C80VA, it is 70 m, while for the MXZ 5C100VA, it is 80 m.

You will need to connect the indoor and outdoor units with the specified indoor/outdoor connecting wire and follow the wiring instructions provided in the manual.

Both models use R410A refrigerant.