Mitsubishi 1886268 User Manual

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En-7

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

5. PUMPING DOWN

4-4.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.

4-5.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.

Procedure

Press the piping/wiring correction switch (SW871) 1 minute or more after turning on the power

supply.

• Correctioncompletesin10to15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0°Corbelow.

LED indication during detection:

LED1

(Red)

LED2

(Yellow)

LED3

(Green)

Lit Lit Once

Result of piping/wiring correction function

LED1

(Red)

LED2

(Yellow)

LED3

(Green)

Result

Lit Not lit Lit

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 top panel.

BH79A325H03_en.indd 7 2018/08/06 13:12:25

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Mitsubishi 1886268 20000 BTU Dual-Zone Mini Split System 9+9 with Wall Mount Indoor Unit, 20 SEER, 12.7 EER, Wireless Remote Controller, AHRI Certified, cETLus Certification, DC Inverter Technology

User Manual - Page 8