Mitsubishi Electronics Air-Conditioners Air Conditioner 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atmos-
phere.
1)Connectthegaugemanifoldvalvetotheserviceportofthestopvalveonthegaspipesideoftheoutdoorunit.
2)Fullyclosethestopvalveontheliquidpipesideoftheoutdoorunit.
3)Closethestopvalveonthegaspipesideoftheoutdoorunitalmostcompletelysothatitcanbeeasilyclosedfullywhenthepressuregaugeshows0
MPa[Gauge](0kgf/cm
2
).
4)StarttheemergencyCOOLoperation.
TostarttheemergencyoperationinCOOLmode,disconnectthepowersupplyplugand/orturnoffthebreaker.After15seconds,connectthepower
supplyplugand/orturnonthebreaker,andthenpresstheE.O.SWonce.(TheemergencyCOOLoperationcanbeperformedcontinuouslyforupto
30minutes.)
5)Fullyclosethestopvalveonthegaspipesideoftheoutdoorunitwhenthepressuregaugeshows0.05to0MPa[Gauge](approx.0.5to0kgf/cm
2
).
6)StoptheemergencyCOOLoperation.
PresstheE.O.SWtwicetostoptheoperation.
5. PUMPING DOWN
4-4. 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l-
ters,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.
Caution:
• Aftertestrunorremotesignalreceptioncheck,turnofftheunitwiththeE.O.SWortheremotecontrollerbeforeturningoffthepowersupply.Notdo-
ingsowillcausetheunittostartoperationautomaticallywhenpowersupplyisresumed.
To the user
• Afterinstallingtheunit,makesuretoexplaintheuseraboutautorestartfunction.
• Ifautorestartfunctionisunnecessary,itcanbedeactivated.Consulttheservicerepresentativetodeactivatethefunction.Refertotheservicemanual
fordetails.
4-3. AUTO RESTART FUNCTION
Thisproductisequippedwithanautorestartfunction.Whenthepowersupplyisstoppedduringoperation,suchasduringblackouts,thefunctionautomati-
callystartsoperationintheprevioussettingoncethepowersupplyisresumed.(Refertotheoperatinginstructionsfordetails.)
4-2. TEST RUN
Make sure the following is done.
•Panelisinstalledcorrectly.
•Indoorandoutdoorunitsareinstalledcorrectly,andpowerissupplied.
1)PresstheE.O.SWonceforCOOL,andtwiceforHEAToperation.Testrunwillbeperformedfor30minutes.Iftheleftlamp
oftheoperationindicatorblinksevery0.5seconds,inspecttheindoor/outdoorunitconnectingwire(A)formis-wiring.After
thetestrun,emergencymode(settemperature24ºC)willstart.
2)Tostopoperation,presstheE.O.SWseveraltimesuntilallLEDlampsturnoff.Refertooperatinginstructionsfordetails.
Checking the remote (infrared) signal reception
PresstheON/OFFbuttonontheremotecontroller(12)andcheckthatanelectronicsoundisheardfromtheindoorunit.Press
theON/OFFbuttonagaintoturntheairconditioneroff.
• Oncethecompressorstops,therestartpreventivedeviceoperatessothecompressorwillnotoperatefor3minutestopro-
tecttheairconditioner.
4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN
Emergencyoperation
switch(E.O.SW)
When pumping down the refrigerant, stop the compressor before disconnecting
the refrigerant pipes. The compressor may burst if air etc. get into it.
WARNING
4-1. PURGING PROCEDURES AND LEAK TEST
Stopvalvefor
GAS
Stopvalvecap
(Torque19.6to
29.4N•m,200
to300kgf•cm)
Vacuumpump(orthevacuum
pumpwiththefunctionto
preventthebackow)
Gaugemanifoldvalve
(forR410A)
Compoundpressuregauge
(forR410A)
–
0.101MPa
(
–
760mmHg)
Handle
Low
HandleHigh
Adapterforpre-
ventingtheback
ow
Chargehose
(forR410A)
*Close
*Open
Hexagonalwrench
Precautionswhenusingthecontrolvalve
Whenattachingthecontrolvalveto
theserviceport,valvecoremayde-
formorloosenifexcesspressureis
applied.Thismaycausegasleak.
Serviceport
Body
Close
Open
Controlvalve
A
Whenattachingthecontrolvalveto
theserviceport,makesurethatthe
valvecoreisinclosedposition,and
thentightenpartA.Donottighten
partAorturnthebodywhenvalve
coreisinopenposition.
Serviceportcap
(Torque13.7to
17.7N•m,140to
180kgf•cm)
*4to5turns
1)Removeserviceportcapofstopvalveonthesideofthe
outdoorunitgaspipe.(Thestopvalvesarefullyclosedand
coveredincapsininitialstate.)
2)Connectgaugemanifoldvalveandvacuumpumptoserv-
iceportofstopvalveonthegaspipesideoftheoutdoor
unit.
3)Runthevacuumpump.(Vacuumizeformorethan15min-
utes.)
4)Checkthevacuumwithgaugemanifoldvalve,thenclose
gaugemanifoldvalve,andstopthevacuumpump.
5)
Leaveasitisforoneortwominutes.Makesurepointer
gaugemanifoldvalveremainsinthesameposition.Conrm
thatpressuregaugeshows–0.101MPa[Gauge](–760
mmHg).
6)Removegaugemanifoldvalvequicklyfromserviceportof
stopvalve.
7)Afterrefrigerantpipesareconnectedandevacuated,fully
openallstopvalvesonbothsidesofgaspipeandliquid
pipe.Operatingwithoutfullyopeninglowerstheperform-
anceandthiscausestrouble.
8)Referto1-3.,andchargetheprescribedamountofre-
frigerantifneeded.Besuretochargeslowlywithliquid
refrigerant.Otherwise,compositionoftherefrigerantinthe
systemmaybechangedandaffectperformanceoftheair
conditioner.
9)Tightencapofserviceporttoobtaintheinitialstatus.
10)Leaktest
Stopvalve
forLIQUID
Pressuregauge
(forR410A)
Chargehose
JG79A867H02_en.indd 7 2014/06/25 13:39:05
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