1
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MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT
WARNING
(Risk of re)
This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit.
In case that refrigerant type is R32, this unit uses a ammable refrigerant.
If refrigerant leaks and comes in contact with re or heating part, it will create harmful gas and there is risk of re.
Read the OPERATION MANUAL carefully before operation.
Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation.
Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the like.
Contents
1. Safety precautions
►
Before installing the unit, make sure you read all the “Safety precautions”.
►Pleasereporttoortakeconsentbythesupplyauthoritybeforeconnectionto
the system.
After installation work has been completed, explain the “Safety Precautions,” use, and
maintenance of the unit to the customer according to the information in the Operation
Manual and perform the test run to ensure normal operation. Both the Installation Manual
and Operation Manual must be given to the user for keeping. These manuals must be
passed on to subsequent users.
: Indicates a part which must be grounded.
Warning:
Carefullyreadthelabelsafxedtothemainunit.
/ : Indicates warnings and cautions when using R32 refrigerant.
Warning:
• Theunitmustnotbeinstalledbytheuser.Askadealeroranauthorizedtechni-
cian to install and repair the unit. If the unit is installed incorrectly, water leakage,
electricshock,orremayresult.
• For installation and relocation work, follow the instructions in the Installation
Manualanduse toolsand pipecomponents specicallymade foruse withR32
refrigerant. If pipe components not designed for R32 refrigerant are used and the
unitisnotinstalledcorrectly,thepipesmayburstandcausedamageorinjuries.
Inaddition,waterleakage,electricshock,orremayresult.
• Theunitmustbeinstalledaccordingtotheinstructionsinordertominimizethe
risk of damage from earthquakes, typhoons, or strong winds. An incorrectly in-
stalledunitmayfalldownandcausedamageorinjuries.
•
Theunitmustbesecurelyinstalledonastructurethatcansustainitsweight.Iftheunit
ismountedonanunstablestructure,itmayfalldownandcausedamageorinjuries.
• If the air conditioner is installed in a small room, measures must be taken to
preventtherefrigerantconcentrationintheroomfromexceedingthesafetylimit
in the event of refrigerant leakage. Consult a dealer regarding the appropriate
measures to preventthe allowable concentration frombeing exceeded.Should
the refrigerant leak and cause the concentration limit to be exceeded, hazards
duetolackofoxygenintheroommayresult.
• Ventilate the room if refrigerant leaks during operation. If refrigerant comes into
contactwithaame,poisonousgaseswillbereleased.
• Allelectricworkmustbeperformedbyaqualiedtechnicianaccordingtolocal
regulationsandtheinstructionsgiveninthismanual.Theunitsmustbepowered
bydedicated power linesand the correctvoltage and circuit breakersmust be
used.Powerlineswithinsufcientcapacityorincorrectelectricalworkmayresult
inelectricshockorre.
• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to
connect the refrigerant pipes. If the pipes are not connected correctly, the unit will
notbeproperlygroundedandelectricshockmayresult.
• Thisapplianceisintendedtobeusedbyexpertortrainedusersinshops,inlight
industryandonfarms,orforcommercialusebylaypersons.
• Useonlyspeciedcablesforwiring.Thewiringconnectionsmustbemadese-
curely with no tension applied on the terminal connections. Also, never splice the
cablesforwiring(unlessotherwiseindicatedinthisdocument).
Failuretoobservetheseinstructionsmayresultinoverheatingorare.
• Ifthesupplycordisdamaged,itmustbereplacedbythemanufacturer,itsservice
agentorsimilarlyqualiedpersonsinordertoavoidhazard.
• Theapplianceshallbeinstalledinaccordancewithnationalwiringregulations.
• Theterminalblockcoverpaneloftheoutdoorunitmustbermlyattached.Ifthe
cover panel is mounted incorrectly and dust and moisture enter the unit, electric
shockorremayresult.
• When installing or relocating, or servicing the air conditioner, use only the speci-
edrefrigerant(R32)tochargetherefrigerantlines.Donotmixitwithanyother
refrigerant and do not allow air to remain in the lines.
Ifairismixedwiththerefrigerant,thenitcanbethecauseofabnormalhighpres-
sureintherefrigerantline,andmayresultinanexplosionandotherhazards.
Theuseofanyrefrigerantotherthanthatspeciedforthesystemwillcauseme-
chanicalfailureorsystemmalfunctionorunitbreakdown.Intheworstcase,this
could lead to a serious impediment to securing product safety.
• UseonlyaccessoriesauthorizedbyMitsubishiElectricandaskadealeroranau-
thorizedtechniciantoinstallthem.Ifaccessoriesareincorrectlyinstalled,water
leakage,electricshock,orremayresult.
• Donotaltertheunit.Itmaycausere,electricshock,injuryorwaterleakage.
• The user should never attempt to repair the unit or transfer it to another location.
Iftheunitisinstalledincorrectly,waterleakage,electricshock,orremayresult.
Iftheair conditionermustbe repairedormoved, aska dealer oranauthorized
technician.
• Afterinstallation has beencompleted, check forrefrigerant leaks. Ifrefrigerant
leaksintotheroomandcomesintocontactwiththeameofaheaterorportable
cookingrange,poisonousgaseswillbereleased.
• Do not use means to accelerate the defrosting process or to clean, other than
thoserecommendedbythemanufacturer.
• Theapplianceshallbestoredinaroomwithoutcontinuouslyoperatingignition
sources(forexample:openames,anoperatinggasapplianceoranoperating
electricheater).
• Donotpierceorburn.
• Be aware that refrigerants may not contain an odour.
/ Pipe-workshallbeprotectedfromphysicaldamage.
• Theinstallationofpipe-workshallbekepttoaminimum.
• Compliancewithnationalgasregulationsshallbeobserved.
• Keepanyrequiredventilationopeningsclearofobstruction.
/ Donotuselowtemperaturesolderalloyincaseofbrazingtherefrigerantpipes.
/ Whenperformingbrazingwork,besuretoventilatetheroomsufciently.
Makesurethattherearenohazardousorammablematerialsnearby.
When performing the work in a closed room, small room, or similar location, make
surethattherearenorefrigerantleaksbeforeperformingthework.
Ifrefrigerant leaks and accumulates, it may ignite or poisonousgases may be
released.
/ Theapplianceshallbestoredinawell-ventilatedareawheretheroomsizecor-
respondstotheroomareaasspeciedforoperation.
/ Keep gas-burning appliances, electric heaters, and other re sources (ignition
sources)away fromthe locationwhere installation, repair, and otherair condi-
tionerworkwillbeperformed.
Ifrefrigerantcomesintocontactwithaame,poisonousgaseswillbereleased.
/ Do not smoke during work and transportation.
Warning:
Describesprecautionsthatmustbeobservedtopreventdangerofinjuryordeath
to the user.
Caution:
Describesprecautionsthatmustbeobservedtopreventdamagetotheunit.
1. Safety precautions 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Installation location 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. Installing the outdoor unit 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. Installing the refrigerant piping 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. Drainage piping work 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6. Electrical work 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7. Test run 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8. Special functions 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9. System control (Fig. 9-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Phillips screwdriver
Level
Scale
Utility knife or scissors
65 mm hole saw
Torque wrench
Wrench (or spanner)
4 mm hexagonal wrench
Flare tool for R32, R410A
Gauge manifold for R32, R410A
Vacuum pump for R32, R410A
Charge hose for R32, R410A
Pipe cutter with reamer
Appropriate personal protective equipment
The installer should ensure they check the respective Work Health and Safety
(WHS) Act within their jurisdiction as the requirements and obligations may differ.
Required Tools for Installation
Caution:
• Do not vent R32 into the atmosphere.
•Conrmthattheinstallationsatises“therequirementsinthismanual”and“therequirementsofsafetyonsiteandenvironment”.