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Installation Manual - Page 8

For MXZ-6E120VAD.

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En-7
4-5. TEST RUN
• Testrunsoftheindoorunitsshouldbeperformedindividually.Seetheinstallationmanualcomingwiththeindoorunit,andmakesurealltheunitsoperate
properly.
• Ifthetestrunwithalltheunitsisperformedatonce,possibleerroneousconnectionsoftherefrigerantpipesandtheindoor/outdoorunitconnectingwires
cannotbedetected.Thus,besuretoperformthetestrunonebyone.
About the restart protective mechanism
Oncethecompressorstops,therestartpreventivedeviceoperatessothecompressorwillnotoperatefor3minutestoprotecttheairconditioner.
Wiring/piping correction function
Thisunithasawiring/pipingcorrectionfunctionwhichcorrectswiringandpipingcombination.Whenthereispossibilityofincorrectwiringandpipingcombi-
nation,andconrmingthecombinationisdifcult,usethisfunctiontodetectandcorrectthecombinationbyfollowingtheproceduresbelow.
Makesurethatthefollowingisdone.
• Powerissuppliedtotheunit.
• Stopvalvesareopen.
Note:
Duringdetection,theoperationoftheindoorunitiscontrolledbytheoutdoorunit.Duringdetection,theindoorunitautomaticallystopsoperation.Thisisnot
a malfunction.
Procedure
Pressthepiping/wiringcorrectionswitch(SW871)1minuteormoreafterturningonthe
powersupply.
• Correctioncompletesin10to20minutes.Whenthecorrectioniscompleted,itsresult
isshownbyLEDindication.Detailsaredescribedinthefollowingtable.
• Tocancelthisfunctionduringitsoperation,pressthepiping/wiringcorrectionswitch
(SW871)again.
• Whenthecorrectioncompletedwithouterror,donotpressthepiping/wiringcorrection
switch(SW871)again.
When the result was “cannot be corrected”, press thepiping/wiring correction switch
(SW871)againtocancelthisfunction.Then,conrmthewiringandpipingcombinationin
aconventionalmannerbyoperatingtheindoorunitsonebyone.
• Theoperationisdonewhilethepowerissupplied.Makesurenottocontactpartsother
thantheswitch,includingtheP.C.board.Thismaycauseelectricshockorburnbyhot
partsandlivepartsaroundtheswitch.ContactingthelivepartsmaycauseP.C.board
damage.
• TopreventelectroniccontrolP.C.boarddamage,makesuretoperformstaticelimination
beforeoperatingthisfunction.
• Thisfunctiondoesnotoperatewhentheoutsidetemperatureis0°Corbelow.
LED indication during detection:
LED1
(Red)
LED2
(Yellow)
LED3
(Green)
Lighted Lighted Once
Result of piping/wiring correction function
LED1
(Red)
LED2
(Yellow)
LED3
(Green)
Result
Lighted Not lighted Lighted
Completed
(Problemcorrectedor
normal)
Once Once Once
Notcompleted
(Detectionfailed)
Otherindications
Referto“SAFETYPRE-
CAUTIONSWHENLED
BLINKS”locatedbehind
theservicepanel.
4-6. EXPLANATION TO THE USER
• UsingtheOPERATINGINSTRUCTIONS,explaintotheuserhowtousetheairconditioner(howtousetheremotecontroller,howtoremovetheairlters,
howtoremoveorputtheremotecontrollerintheremotecontrollerholder,howtoclean,precautionsforoperation,etc.).
• RecommendtheusertoreadtheOPERATINGINSTRUCTIONScarefully.
Whenrelocatingordisposingoftheairconditioner,pumpdownthesystemfollowingtheprocedurebelowsothatnorefrigerantisreleasedintotheatmosphere.
1)Turnoffthebreaker.
2)Connectthegaugemanifoldvalvetotheserviceportofthestopvalveonthegaspipesideoftheoutdoorunit.
3)Fullyclosethestopvalveontheliquidpipesideoftheoutdoorunit.
4)Turnonthebreaker.
5)StarttheemergencyCOOLoperationonalltheindoorunits.
6)Whenthepressuregaugeshows0–0.05MPa[Gauge](approx.0–0.5kgf/cm
2
),fullyclosethestopvalveonthegaspipesideoftheoutdoorunitand
stoptheoperation.(Refertotheindoorunitinstallationmanualaboutthemethodforstoppingtheoperation.)
* Iftoomuchrefrigeranthasbeenaddedtotheairconditionersystem,thepressuremaynotdropto0–0.05MPa[Gauge](approx.0–0.5kgf/cm
2
),or
theprotectionfunctionmayoperateduetothepressureincreaseinthehigh-pressurerefrigerantcircuit.Ifthisoccurs,usearefrigerantcollectingdevice
tocollectalloftherefrigerantinthesystem,andthenrechargethesystemwiththecorrectamountofrefrigerantaftertheindoorandoutdoorunitshave
been relocated.
7)Turnoffthebreaker.Removethepressuregaugeandtherefrigerantpiping.
When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.
The compressor may burst and cause injury if any foreign substance, such as air, enters the pipes.
WARNING
5. PUMPING DOWN
BH79A274H01_en.indd 7 2016/03/23 10:42:18
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