MXZ-3C30NA2 Installation Guide

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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
0.1to0psi[Gauge](0.05to0MPa),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 0.1 to 0 psi [Gauge] (0.05 to 0 MPa) , 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
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is“Notcompleted”,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32°F(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.
5. PUMPINGDOWN
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combination,
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 mal-
function.
WG79A686H01_en.indd 7 11/24/2015 9:04:55 AM