
EN-14
EN
Even if these items are checked, when the unit does not recover from the
trouble, stop using the air conditioner and consult your dealer.
Symptom Explanation & Check Points
Indoor Unit
Theunitcannotbeoperated. • Isthebreakerturnedon?
• Isthepowersupplyplugconnected?
• Istheontimerset?Page10
Thehorizontalvanedoesnot
move. • Arethehorizontalvaneandtheverticalvane
installedcorrectly?
• Isthefanguarddeformed?
• Whenthebreakeristurnedon,thehorizontal
vanes’positionwillberesetinaboutaminute.
Aftertheresethascompleted,thenormalhori-
zontalvanes’operationresumes.Thesameis
trueintheemergencycoolingoperation.
The unit cannot be operated for
about3minuteswhenrestarted. • This protects the unit according to instructions
fromthemicroprocessor.Pleasewait.
Mistisdischargedfromtheair
outletoftheindoorunit. •
Thecoolairfromtheunitrapidlycoolsmoisture
intheairinsidetheroom,anditturnsintomist.
Theswingoperationofthehorizon-
talvaneissuspendedforawhile,
thenrestarted.
• Thisisfortheswingoperationofthehorizontal
vanetobeperformednormally.
Whenswingisselectedincool
mode/dry mode/fan mode, the
lowerhorizontalvanedoesnot
move.
• Itisnormalthatthelowerhorizontalvanedoes
notmovewhenswingisselectedincoolmode/
drymode/fanmode.
Theairowdirectionchanges
duringoperation.
Thedirectionofthehorizontal
vane cannot be adjusted with
theremotecontroller.
• Whentheunitisoperatedincoolmodeordry
mode,iftheoperationcontinueswithairblow-
ingdownfor0.5to1hour,thedirectionofthe
airowisautomaticallysettoupwardposition
topreventwaterfromcondensinganddripping.
• Inthe heating operation,ifthe airow tem-
peratureistooloworwhendefrostingisbeing
done,thehorizontalvaneisautomaticallyset
tohorizontalposition.
The operation stops for about
10minutesintheheating
operation.
• Outdoorunitisindefrost.
Sincethisiscompleted in max.10minutes,
pleasewait.(Whentheoutsidetemperatureis
toolowandhumidityistoohigh,frostisformed.)
The unit starts operation by
itselfwhenthemainpoweris
turnedon,buthasn’treceived
signfromtheremotecontroller.
• These modelsareequipped withan auto
restartfunction.Whenthe main poweris
turnedowithoutstopping the unit withthe
remotecontrollerandisturned onagain, the
unitstartsoperationautomaticallyinthesame
modeastheonesetwiththeremotecontrol-
lerjustbeforetheshuto ofthemainpower.
Referto“AutoRestartFunction”.Page10
Thetwohorizontalvanestouch
eachother.Thehorizontal
vanesareinanabnormalposi-
tion.Thehorizontalvanesdo
notreturntothecorrect“close
position”.
Performoneofthefollowing:
•
Turnoandonthebreaker.Makesurethehori-
zontalvanesmovetothecorrect“closeposition”.
• Startandstoptheemergencycoolingoperation
andmakesurethehorizontalvanesmovetothe
correct“closeposition”.
Incoolmode/drymode,whenthe
room temperature reaches near
the set temperature, the outdoor
unit stops, then the indoor unit
operatesatlowspeed.
• When the room temperature deviates from the
set temperature, the indoor fan starts running
accordingtothesettingsontheremotecontrol-
ler.
Theindoorunitdiscolorsover
time. • Althoughplasticturnsyellowduetotheinuence
ofsomefactors such as ultravioletlightand
temperature,thishasnoeectontheproduct
functions.
Theoperationindicatorlampis
dim.Theunitdoesnotbeep. • Is the NIGHT MODEoperationset? Page9
Multi System
The indoor unit which is not
operating becomes warm and a
sound,similartowaterowing,
isheardfromtheunit.
• Asmallamountofrefrigerantcontinuestoow
into the indoor unit even though it is not operat-
ing.
When heating operation is
selected,operationdoesnot
startrightaway.
• When operation is started during defrosting of
outdoorunitisdone,ittakesafewminutes(max.
10minutes)toblowoutwarmair.
Outdoor Unit
The fan of the outdoor unit does
not rotate even though the com-
pressorisrunning.Evenifthe
fanstartstorotate,itstopssoon.
• Whentheoutside temperature islowduring
coolingoperation,thefanoperatesintermittently
tomaintainsucientcoolingcapacity.
Waterleaksfromtheoutdoor
unit. • Duringcoolingoperationanddryoperation,pipe
orpipeconnectingsectionsarecooledandthis
causeswatertocondense.
• In the heating operation, water condensed on
theheatexchangerdripsdown.
• In the heating operation, the defrosting operation
makesiceformingontheoutdoorunitmeltand
dripdown.
Whitesmokeisdischargedfrom
theoutdoorunit. • In the heating operation, vapor generated by the
defrostingoperationlookslikewhitesmoke.
Symptom Explanation & Check Points
Remote Controller
Thedisplayontheremote
controllerdoesnotappearorit
isdim.Theindoorunitdoesnot
respondtotheremotecontrol
signal.
• Arethebatteriesexhausted? Page 5
• Isthepolarity (+, -)ofthebatteries correct?
Page 5
• Areanybuttonsontheremotecontrollerofother
electricappliancesbeingpressed?
Does Not Cool or Heat
Theroomcannotbecooledor
heatedsuciently. • Isthetemperaturesettingappropriate?
Page6
• Isthefan setting appropriate?Pleasechange
fanspeedtoHighorSuperHigh.Page7
• Aretheltersclean?Page12
• Isthefanorheatexchangeroftheindoorunit
clean?
• Arethereanyobstaclesblockingtheairinletor
outletoftheindoororoutdoorunit?
• Isawindowordooropen?
• Itmaytakeacertaintimetoreachthesetting
temperature or may not reach that depending on
thesizeoftheroom,theambienttemperature,
andthelike.
• IstheNIGHTMODEoperationset?Page9
Theroomcannotbecooled
suciently. • Whenaventilationfanoragascookerisused
inaroom,thecoolingloadincreases,resulting
inaninsucientcoolingeect.
• Whentheoutsidetemperatureishigh,thecooling
eectmaynotbesucient.
The room cannot be heated
suciently. • Whentheoutsidetemperatureislow,theheating
eectmaynotbesucient.
Airdoesnotblowoutsoonin
theheatingoperation. • Pleasewaitastheunitispreparingtoblowout
warmair.
Airow
The air from the indoor unit
smellsstrange. • Aretheltersclean?Page12
• Isthefanorheatexchangeroftheindoorunit
clean?
• Theunitmaysuckin anodoradhering tothe
wall,carpet,furniture,cloth,etc.andblowitout
withtheair.
Sound
Crackingsoundisheard. • Thissoundisgeneratedbytheexpansion/con-
tractionofthefrontpanel,etc.duetochangein
temperature.
“Burbling”soundisheard. • This sound is heard when the outside air is
absorbed from the drain hose by turning on the
rangehoodortheventilationfan,makingwater
owinginthedrainhosetospoutout.
Thissoundisalsoheardwhentheoutsideair
blowsintothedrain hose incasetheoutside
windisstrong.
Mechanicalsoundisheard
fromtheindoorunit. • Thisistheswitchingsoundinturningon/othe
fanorthecompressor.
Thesoundofwaterowingis
heard. • This is the sound of refrigerant or condensed
waterowingintheunit.
Hissing sound is sometimes
heard. • Thisisthe soundwhentheowof refrigerant
insidetheunitischanged.
Timer
Weeklytimerdoesnotoperate
accordingtosettings. • Istheon/otimerset?Page10
• Transmitthesetting information oftheweekly
timertotheindoorunitagain.Whentheinfor-
mationissuccessfullyreceived,alongbeepwill
soundfromtheindoorunit.Ifinformationfailsto
bereceived,3shortbeepswillbeheard.Ensure
informationissuccessfullyreceived. Page 11
• Whenapowerfailureoccursandthemainpower
turnso,the indoor unitbuilt-inclock will be
incorrect.Asaresult,theweeklytimermaynot
worknormally.
Besureto place theremotecontroller where
thesignalcan be receivedbythe indoor unit.
Page 5
The unit starts/stops the opera-
tionbyitself. • Istheweeklytimerset? Page 11
Wi-Fi Interface
When error occurs during con-
nectionsetuporoperation. RefertotheSETUPMANUAL.
ForSETUPMANUAL, pleasegotothewebsite
below.
https://www.melcloud.com/Support
When You Think That Trouble Has Occurred