Mitsubishi Electric Mr.SLIM SEZ-M25DA User manual

Packaged Air-Conditioners
INDOOR UNIT
SEZ-M25,M35,M50,M60,M71DA
English
INSTALLATION MANUAL
For safe and correct use, please read this installation manual thoroughly before installing the air-conditioner unit.
FOR INSTALLER
English
INSTALLATIONSHANDBUCH
Zum sicheren und ordnungsgemäßen Gebrauch der Klimaanlage das Installationshandbuch gründlich
durchlesen.
FÜR INSTALLATEURE
Deutsch
MANUEL D’INSTALLATION
Veuillez lire le manuel d’installation en entier avant d’installer ce climatiseur pour éviter tout accident et vous
assurer d’une utilisation correcte.
POUR L’INSTALLATEUR
Français
MANUAL DE INSTALACIÓN
Para un uso seguro y correcto, lea detalladamente este manual de instalación antes de montar la unidad de aire
acondicionado.
PARA EL INSTALADOR
Español
MANUALE DI INSTALLAZIONE
Per un uso sicuro e corretto, leggere attentamente questo manuale di installazione prima di installare il
condizionatore d’aria.
PER L’INSTALLATORE
Italiano
INSTALLATIEHANDLEIDING
Voor een veilig en juist gebruik moet u deze installatiehandleiding grondig doorlezen voordat u de airconditioner
installeert.
VOOR DE INSTALLATEUR
Nederlands
INSTALLATIONSMANUAL
Läs denna installationsmanual noga för säkert och korrekt bruk innan luftkonditioneringen installeras.
FÖR INSTALLATÖREN
Svenska
INSTALLATIONSMANUAL
Læs venligst denne installationsmanual grundigt, før De installerer airconditionanlægget, af hensyn til sikker og
korrekt anvendelse.
TIL INSTALLATØREN
Dansk
MANUAL DE INSTALAÇÃO
Para segurança e utilização correctas, leia atentamente este manual de instalação antes de instalar a unidade
de ar condicionado.
PARA O INSTALADOR
Português
ΕΓΧΕΙΡΙ∆ΙΟ Ο∆ΗΓΙΩΝ ΕΓΚΑΤΑΣΤΑΣΗΣ
Για ασφάλεια και σωστή χρήση, παρακαλείστε διαβάσετε προσεχτικά αυτό το εγχειρίδιο εγκατάστασης πριν
αρχίσετε την εγκατάσταση της μονάδας κλιματισμού.
ΓΙΑ ΑΥΤΟΝ ΠΟΥ ΚΑΝΕΙ ΤΗΝ ΕΓΚΑΤΑΣΤΑΣΗ
Ελληνικά
MONTAJ ELKİTABI
Emniyetli ve doğru biçimde nasıl kullanılacağınıöğrenmek için lütfen klima cihazınımonte etmeden önce bu
elkitabınıdikkatle okuyunuz.
MONTÖR İÇİN
Türkçe
PODRĘCZNIK INSTALACJI
W celu bezpiecznego i poprawnego korzystania należy przed zainstalowaniem klimatyzatora dokładnie
zapoznaćsięz niniejszym podręcznikiem instalacji.
DLA INSTALATORA
Polski
<ORIGINAL>
INSTALLASJONSHÅNDBOK
For sikker og riktig bruk, skal du lese denne installasjonshåndboken nøye før du installerer klimaanlegget.
FOR INSTALLATØREN
Norsk
00_VZ79D588H01_Cover.fm 1 ページ ２０１７年９月４日 月曜日 午後１時１６分

2
3.1
3
B
Min. 20 mm
Min.10 mm
H
AC
G
JB
Min. 2500 mm
Min. 300 mm
Min. 2500 mm
Min. 10 mm
A
H
AC
D
G
B
777
S
50
50 P
700
Min. 300 mm
(Viewed from the direction of the arrow B)
ⒼⒽ
Ⓚ
Ⓕ
Ⓐ
Ⓘ
P50
R
777
450
100~200
450475
70050
Min. 300 mm
(Viewed from the direction of the arrow B)
Ⓔ
Ⓐ
Ⓘ
Ⓙ
Ⓕ
Ⓖ Ⓗ
ⒼⒽ
Ⓕ
700
450
475 450
Q
50~150
450
450
100~200
Min. 300 mm
(Viewed from the direction of the arrow A)
P
Ⓔ
Ⓐ
Ⓓ
Ⓘ
[Fig. 3-1-1]
[Fig. 3-1-3]
[Fig. 3-1-5]
[Fig. 3-1-2]
[Fig. 3-1-4]
(Unit: mm)
ⒶElectric box ⒽIntake air
ⒷCeiling ⒾBottom of indoor unit
ⒸCeiling beam ⒿAccess door 3
ⒹAccess door 2 (450 mm x 450 mm) ⓀAccess door 4
ⒺAccess door 1 (450 mm x 450 mm)
ⒻMaintenance access space
ⒼSupply air
(mm)
Model P Q R S
SEZ-M25 700 50~150 800 1300
SEZ-M35, 50 900 150~250 1000 1500
SEZ-M60, 71 1100 250~350 1200 1700

3
5.1
4.1
4
5
YX
LW
Ⓐ
Z
Ⓒ
Ⓓ
Ⓒ
Ⓔ
Ⓓ
Ⓑ
Ⓐ
[Fig. 4-1]
ⒶCenter of gravity
ⒶUnit body
ⒷLifting machine
ⒸNuts(eldsupply)
ⒹWashers (accessory)
ⒺM10hangingbolt(eldsupply)
[Fig. 5-1-1] [Fig. 5-1-2]

4
6.1
6.2
6.5
6.3
6
øB
øA
ⓐ
ⓑ
ⓒ
ⓑ
ⓐ
ⓓⓔⓕⓖⓗ
ⓘ
ⓑ
ⓐ
ⓓ
ⓒ
ⓑ
ⓐ
ⓐⓓ
ⓒⓑ
ⓔⓕ
90˚
ⓐ
ⓑ
ⓔ
ⓑ
ⓒ
ⓓ
ⓒ
A
Ⓐ
Ⓑ
Ⓒ
Ⓓ
Ⓕ
Ⓖ
Ⓔ
Ⓜ
Ⓛ
Ⓔ
Ⓕ
Ⓛ
ⒶⒼ
Ⓗ
Ⓗ
ⓀⓁ
Ⓙ
Ⓘ
Ⓙ
Ⓞ
Ⓞ
Ⓝ
Ⓝ
20
20
20
20
Ⓐ
Ⓑ①
Ⓒ Ⓒ Ⓒ
Ⓓ②
Ⓔ
ⒹⒺⒽ
Ⓖ
Ⓘ
Ⓕ
Ⓑ
Ⓒ
52
5
Ⓐ
ⓐIndoor unit
ⓑOutdoor unit
Model A B
SEZ-M25, 35 9.52 6.35
SEZ-M50 12.7 6.35
SEZ-M60 15.88 6.35
SEZ-M71 15.88 9.52
ⓐFlare nut
ⓑCopper tube
ⓐBurr
ⓑCopper tube/pipe
ⓒSpare reamer
ⓓPipe cutter
ⓐFlaring tool
ⓑDie
ⓒCopper tube
ⓓFlare nut
ⓔYoke
ⓐSmooth all around
ⓑInside is shining without
any scratches
ⓒEven length all around
ⓓToo much
ⓔTilted
ⓕScratchonaredplane
ⓖCracked
ⓗUneven
ⓘBad examples
ⓐCopper tubes
ⓑGood
ⓒNo good
ⓓTilted
ⓔUneven
ⓕBurred
ⒶPipe cover (small) (accessory)
ⒷCaution:
Pull out the thermal insulation on the refrigerant piping at
thesite,insertthearenuttoaretheend,andreplacethe
insulation in its original position.
Take care to ensure that condensation does not form on
exposed copper piping.
ⒸLiquid end of refrigerant piping
ⒹGas end of refrigerant piping
ⒺSite refrigerant piping
ⒻMain body
ⒼPipe cover (large) (accessory)
ⒽThermalinsulation(eldsupply)
ⒾPull
ⒿFlare nut
ⓀReturn to original position
ⓁEnsure that there is no gap here
ⓂPlate on main body
ⓃBand (accessory)
ⓄEnsure that there is no gap here. Place join upwards.
ⒶDownward slope 1/100 or more
ⒷConnection dia. R1 external thread
ⒸIndoor unit
ⒹCollective piping
ⒺMaximize this length to approx. 10 cm
ⒶIndoor unit
ⒷPipe cover (short) (accessory)
ⒸTie band (accessory)
ⒹBandxingpart
ⒺInsertion margin
ⒻDrain hose (accessory)
ⒼDrain pipe (O.D. ø32 PVC TUBE,
eldsupply)
ⒽInsulatingmaterial(eldsupply)
ⒾMax.145 ± 5 mm
[Fig. 6-2-1]
[Fig. 6-2-4]
[Fig. 6-2-2]
[Fig. 6-2-5]
[Fig. 6-2-3]
[Fig. 6-3-1]
[Fig. 6-3-2]
[Fig. 6-5-1] [Fig. 6-5-2]
[Fig. 6-1]

5
7
8.1
8.2
8
Ⓕ
Ⓖ
Ⓔ
ⒹⒸ
ⒷⒶ
Ⓐ
Ⓒ
Ⓑ
Ⓓ
S3
S3
S2
S1
S2S1
21
Ⓓ
ⒺⒸ Ⓒ
ⒷⒶ Ⓐ
Ⓒ
Ⓐ
Ⓐ
Ⓑ
Ⓒ
S3
S2
S1
12
S1 S2 S3
Ⓚ
Ⓙ
Ⓜ
Ⓛ
Ⓐ
Ⓑ
Ⓔ
Ⓕ
Ⓘ
Ⓗ
Ⓖ
ⒶAir inlet
ⒷAir outlet
ⒸAccess door
ⒹCeiling surface
ⒺCanvas duct
ⒻAirlter
ⒼInlet grille
ⒶIndoor unit
ⒷOutdoor unit
ⒸWired remote controller
ⒹMain switch/fuse
ⒺGrounding
For Power
supply
For Power supply
ⒺUse PG bushing to keep the weight of the cable and external force from being applied to
the power supply terminal connector. Use a cable tie to secure the cable.
ⒻIndoor/outdoor unit connecting wire
ⒼTensile force
ⒽUse ordinary bushing
ⒾTransmission wiring
ⒿTerminal bed for power source and indoor transmission
ⓀTerminal bed for remote controller
ⓁIndoor/outdoor unit connecting wire
ⓂTransmission line to the remote controller
ⒶTerminal bed box
ⒷKnockout hole
ⒸRemove
ⒶScrew holding cover (2pcs)
ⒷCover
[Fig. 7-1]
[Fig. 8-1]
[Fig. 8-2-1]
[Fig. 8-2-3]
[Fig. 8-2-2]
[Fig. 8-2-4]

6
8.4
8.2
8
IC
CN90
IC
CN90
12
⑥
⑤
②
④
③
⑦
LN
①
J41
J42
JP1 JP2 JP3
CN90 CN4F CN44 CN20(Red) CNMF
SW1 SW2 CN32
CN41CN51
ON OFF
SWE
CN2L CN22(Blue)
CNP
(Blue)
CN3C(Blue)
CN01
(Black)
ⒶCN90: Connector for remote controller wire connection
Controller circuit board on the indoor unit (reference)
IC
OC(00)
CN90
TB1
TB4
①
Ⓓ
Ⓒ
Ⓐ
Ⓑ
Standard 1:1
Pair number: 0
Pair number: 0 Pair number: 0
IC IC IC IC
CN90 CN90 CN90 CN90
Pair number: 0 Pair number: 0
Pair number: 0
Pair number: 0Pair number: 0
IC IC IC IC
CN90 CN90 CN90 CN90
Pair number: 1
Pair number: 1
Pair number: 2
Pair number: 2
Pair number: 3
Pair number: 3
Pair number: 0
Pair number: 0
ⒶIndoor terminal block
ⒸIndoor/outdoor unit
connecting wire
3-core 1.5 mm2or
more
ⒹOutdoor terminal block
ⒷEarth wire (green/yellow)
ⒺPower supply cord
ⒶIndoor terminal block
ⒷEarth wire (green/yellow)
ⒸIndoor/outdoor unit connecting wire 3-core
1.5 mm2or more
ⒹOutdoor terminal block
ⒺPower supply cord
①Connecting cable
Cable 3-core 1.5 mm2, in conformity with
Design 245 IEC 57.
②Indoor terminal block
③Outdoor terminal block
④Always install an earth wire (1-core 1.5 mm2)
longer than other cables
⑤Remote controller cable
Wire No ×size (mm2) : Cable 2C ×0.3
This wire accessory of remote controller
(wire length : 10 m, non-polar. Max. 500 m)
⑥Wired remote controller (option)
⑦Power supply cord
Indoor/outdoor wiring
Signal receiving unit wiring
ⒶOutdoor unit
ⒷRefrigerant address
ⒸIndoor unit
ⒹSignal receiving unit
[Fig. 8-2-5]
[Fig. 8-4-1]
[Fig. 8-4-2]
[Fig. 8-4-3] [Fig. 8-4-4]
[Fig. 8-4-5]

7
8.5
8
F1 F2 F3 F4
Service menu
Cursor
Main menu:
Test run
Input maintenance info.
Function setting
Check
Self check
F1 F2 F3 F4
Function setting
Cursor Address
Monitor:
Ref. address
Unit No. Grp./1/2/3/4/All
F1 F2 F3 F4
Function setting
Cursor Cursor
Request:
Ref. address
Mode 1
Mode 2
Mode 3
Mode 4
Grp.
F1 F2 F3 F4
Function setting
Cursor Cursor
Request:
Ref. address
Mode 7
Mode 8
Mode 9
Mode10
Unit # 1
F1 F2 F3 F4
Function setting
Ref. address
Sending data
③
①②
CHECK CHECK
CHECKCHECK
④
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
CHECK
Ⓔ
Ⓕ
Ⓓ
Ⓒ
Ⓐ
Ⓑ
ⒶHour button
ⒷMinute button
ⒸTEMP button
ⒹTEMP button
ⒺON/OFF button
ⒻCHECK button
[Fig. 8-5-1]
[Fig. 8-5-4]
[Fig. 8-5-6]
[Fig. 8-5-2]
[Fig. 8-5-5]
[Fig. 8-5-3]

8
9.2
9
10.1
10
[Fig. 9-2-1]
[Fig. 10-1]
[Fig. 9-2-4]
[Fig. 9-2-2] [Fig. 9-2-3]
F1 F2 F3 F4
unemecivreS
rosruC
:unemniaM
Test run
Input maintenance info.
Function setting
Check
Self check
F1 F2 F3 F4
Test run menu
Cursor
Service menu:
Test run
Drain pump test run
F1 F2 F3 F4
Cool
Pipe
Auto
Switch disp.
Mode Fan
RemainTest run
ON/OFF TEMP
FAN
VANE
TEST RUN
AUTO STOP
AUTO START
h
min
LOUVER
MODE
CHECK
RESETSET CLOCK
TEST RUN
Ⓑ
Ⓐ
Ⓒ
Ⓓ
Ⓑ
Ⓐ
Ⓖ
Ⓗ
Ⓚ
Ⓛ
Ⓜ
ⒾⒿ
Ⓒ
Ⓓ
Ⓔ
Ⓕ
ⒶTEST RUN button
ⒷMODE button
ⒸFAN button
ⒹVANE button
ⒶIndoor unit
ⒷUnion
ⒸLiquid pipe
ⒹGas pipe
ⒺStop valve
ⒻOutdoor unit
ⒼRefrigerant gas cylinder operating valve
ⒽRefrigerant gas cylinder for R32/R410A with
siphon
ⒾRefrigerant (liquid)
ⒿElectronic scale for refrigerant charging
ⓀCharge hose (for R32/R410A)
ⓁGauge manifold valve (for R32/R410A)
ⓂService port

9
Warning:
• Donotuserefrigerantotherthanthetypeindicatedinthemanualsprovided
withtheunitandonthenameplate.
- Doingsomaycausetheunitorpipestoburst,orresultinexplosionorre
during use, during repair, or at the time of disposal of the unit.
- It may also be in violation of applicable laws.
- MITSUBISHI ELECTRIC CORPORATION cannot be held responsible
for malfunctions or accidents resulting from the use of the wrong type of
refrigerant.
• Whenhandlingthisproduct,alwayswearprotectiveequipment.
 EG:Gloves,fullarmprotectionnamelyboilersuit,andsafetyglasses.
- Improper handling may result in injury.
• Donotinstallitbyyourself(customer).
 Incompleteinstallationcouldcauseinjuryduetore,electricshock,
theunitfallingorleakageofwater.Consultthedealerfromwhomyou
purchasedtheunitorspecialinstaller.
• Thisapplianceisnotintendedforusebypersons(includingchildren)with
reducedphysical,sensoryormentalcapabilities,orlackofexperience
andknowledge,unlesstheyhavebeengivensupervisionorinstruction
concerninguseoftheappliancebyapersonresponsiblefortheirsafety.
• Installtheunitsecurelyinaplacewhichcanbeartheweightoftheunit.
 Wheninstalledinaninsufcientstrongplace,theunitcouldfallcausing
injured.
• Usethespeciedwirestoconnecttheindoorandoutdoorunitssecurely
andattachthewiresrmlytotheterminalboardconnectingsectionssothe
stressofthewiresisnotappliedtothesections.
 Incompleteconnectingandxingcouldcausere.
• Donotuseintermediateconnectionofthepowercordortheextension
cordanddonotconnectmanydevicestooneACoutlet.
 Itcouldcauseareoranelectricshockduetodefectivecontact,defective
insulation,exceedingthepermissiblecurrent,etc.
• Checkthattherefrigerantgasdoesnotleakafterinstallationhas
completed.
• Performtheinstallationsecurelyreferringtotheinstallationmanual.
 Incompleteinstallationcouldcauseapersonalinjuryduetore,electric
shock,theunitfallingorleakageofwater.
• Performelectricalworkaccordingtotheinstallationmanualandbesureto
useanexclusivecircuit.
 Ifthecapacityofthepowercircuitisinsufcientorthereisincomplete
electricalwork,itcouldresultinareoranelectricshock.
• Ifthesupplycordisdamaged,itmustbereplacedbythemanufacturer,its
serviceagentorsimilarlyqualiedpersonsinordertoavoidahazard.
• Attachtheelectricalpartcovertotheindoorunitandtheservicepanelto
theoutdoorunitsecurely.
 Iftheelectricalpartcoverintheindoorunitand/ortheservicepanelinthe
outdoorunitarenotattachedsecurely,itcouldresultinareoranelectric
shockduetodust,water,etc.
• Besuretousethepartprovidedorspeciedpartsfortheinstallationwork.
 Theuseofdefectivepartscouldcauseaninjuryorleakageofwaterdueto
are,anelectricshock,theunitfalling,etc.
• Ventilatetheroomifrefrigerantleaksduringoperation.
 Iftherefrigerantcomesincontactwithaame,poisonousgaseswillbe
released.
• Childrenshouldbesupervisedtoensurethattheydonotplaywiththe
appliance.
• Theinstallerandsystemspecialistshallsecuresafetyagainstleakage
accordingtolocalregulationorstandards.
- The instructions in this manual may be applicable if local regulation are not
available.
• Payaspecialattentiontotheplace,suchasabasement,etc.where
refrigerationgascanstay,sincerefrigerationisheavierthantheair.
• Thisapplianceisintendedtobeusedbyexpertortrainedusersinshops,
inlightindustryandonfarms,orforcommercialusebylaypersons.
Contents
This Installation Manual describes only for the indoor unit and the connected outdoor unit of SUZ series.
If the connected outdoor unit is MXZ series, refer to the Installation Manual for MXZ series.
Note:
Thephrase“Wiredremotecontroller”inthisinstallationmanualrefersonlytothePAR-33MAA.Ifyouneedanyinformationfortheotherremotecontroller,
pleaserefertoeithertheinstallationmanualorinitialsettingmanualwhichareincludedintheseboxes.
• Pleasereporttoortakeconsentbythesupplyauthoritybeforeconnection
tothesystem.
• Besuretoread“Safetyprecautions”beforeinstallingtheairconditioner.
• Besuretoobservethecautionsspeciedhereastheyincludeimportant
itemsrelatedtosafety.
• Theindicationsandmeaningsareasfollows.
Warning:
Couldleadtodeath,seriousinjury,etc.
Caution:
Couldleadtoseriousinjuryinparticularenvironmentswhenoperated
incorrectly.
• Afterreadingthismanual,besuretokeepittogetherwiththeinstruction
manualinahandyplaceonthecustomer’ssite.
Symbolsputontheunit
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Indicates that caution should be taken with rotating parts.
: Indicates that the main switch must be turned off before servicing.
: Beware of electric shock.
: Beware of hot surface.
Warning:
Carefullyreadthelabelsafxedtothemainunit.
1. Safetyprecautions
1. Safety precautions..............................................................................................9
2. Selecting the installation location ..................................................................... 11
3. Selecting an installation site & Accessories ..................................................... 11
4. Fixing hanging bolts .........................................................................................12
5. Installing the unit ..............................................................................................12
6. Refrigerant piping work ....................................................................................13
7. Duct work .........................................................................................................15
8. Electrical work ..................................................................................................15
9. Test run.............................................................................................................17
10. Maintenance.....................................................................................................20
► Beforeinstallingtheunit,makesureyoureadallthe“SafetyPrecautions”.
► The“SafetyPrecautions”provideveryimportantpointsregardingsafety.Makesureyoufollowthem.
► Pleasereporttoortakeconsentbythesupplyauthoritybeforeconnectiontothesystem.
MEANINGSOFSYMBOLSONTHEUNIT
WARNING
(Riskofre)
This symbol is only for R32 refrigerant. The type of the refrigerant used is written on the nameplate on the outdoor unit.
R32refrigerantisammable.Iftherefrigerantleaks,orcomesincontactwithreorpartsthatgenerateheat,itmaycreateharmfulgas
andposea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.

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• Wheninstalling,relocating,orservicingtheairconditioner,useonlythe
speciedrefrigerantwrittenontheoutdoorunittochargetherefrigerant
lines.Donotmixtherefrigerantwithanyotherrefrigerant,anddonotallow
airtoremaininthelines.
- If air is mixed with the refrigerant, then it may cause abnormal high pressure in
the refrigerant lines, resulting in an explosion and other hazards.
- Theuseofanyrefrigerantotherthanthatspeciedforthesystemwillcause
mechanical failure, system malfunction, or unit breakdown. In the worst case,
this could lead to a serious impediment to securing product safety.
- It may also be in violation of applicable laws.
- MITSUBISHI ELECTRIC CORPORATION cannot be held responsible
for malfunctions or accidents resulting from the use of the wrong type of
refrigerant.
• Thisindoorunitshouldbeinstalledinaroomwhichisequaltoorlarger
thantheoorspacespeciedintheoutdoorunitinstallationmanual.Refer
totheoutdoorunitinstallationmanual.
• Onlyusemeansrecommendedbythemanufacturertoacceleratethe
defrostingprocessortoclean.
• Thisindoorunitshallbestoredinaroomthathasnocontinuously-
operatingignitiondevicesuchasopename,gasappliance,orelectrical
heater.
• Donotpierceaholeinorburnthisindoorunitorrefrigerantlines.
• Beawarethattherefrigerantmaybeodour-free.
• Pipe-workshallbeprotectedfromphysicaldamage.
• Theinstallationofpipe-workshallbekepttoaminimum.
• Compliancewithnationalgasregulationsshallbeobserved.
• Keepanyrequiredventilationopeningsclearofobstruction.
• Donotuselowtemperaturesolderalloywhenbrazingtherefrigerantpipes.
• Whenperformingbrazingwork,besuretoventilatetheroomsufciently.
Makesurethattherearenohazardousorammablematerialsnearby.
Whenperformingtheworkinaclosedroom,smallroom,orsimilar
location,makesurethattherearenorefrigerantleaksbeforeperforming
thework.Ifrefrigerantleaksandaccumulates,itmayigniteorpoisonous
gasesmaybereleased.
• Forinstallationandrelocationwork,followtheinstructionsinthe
installationmanualandusetoolsandpipecomponentsspecicallymade
forusingwithrefrigerantspeciedintheoutdoorunitinstallationmanual.
Caution:
• Performgrounding.
 Donotconnectthegroundwiretoagaspipe,waterpipearresteror
telephonegroundwire.Defectivegroundingcouldcauseanelectricshock.
• Donotinstalltheunitinaplacewhereaninammablegasleaks.
 Ifgasleaksandaccumulatesintheareasurroundingtheunit,itcould
causeanexplosion.
• Installagroundleakagebreakerdependingontheinstallationplace(where
itishumid).
 Ifagroundleakagebreakerisnotinstalled,itcouldcauseanelectric
shock.
• Performthedrainage/pipingworksecurelyaccordingtotheinstallation
manual.
 Ifthereisadefectinthedrainage/pipingwork,watercoulddropfromthe
unitandhouseholdgoodscouldbewetanddamaged.
• Fastenaarenutwithatorquewrenchasspeciedinthismanual.
 Whenfastenedtootight,aarenutmaybrokenafteralongperiodand
causealeakageofrefrigerant.
1. Safetyprecautions

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3. Selectinganinstallationsite&Accessories
• Selectasitewithsturdyxedsurfacesufcientlydurableagainsttheweightofunit.
• Beforeinstallingunit,theroutingtocarryinunittotheinstallationsiteshouldbe
determined.
• Selectasitewheretheunitisnotaffectedbyenteringair.
• Selectasitewheretheowofsupplyandreturnairisnotblocked.
• Selectasitewhererefrigerantpipingcaneasilybeledtotheoutside.
• Selectasitewhichallowsthesupplyairtobedistributedfullyinroom.
• Donotinstallunitatasitewithoilsplashingorsteaminmuchquantity.
• Donotinstallunitatasitewherecombustiblegasmaygenerate,owin,
stagnate or leak.
• Donotinstallunitatasitewhereequipmentgeneratinghighfrequencywaves(a
high frequency wave welder for example) is provided.
• Donotinstallunitatasitewhereredetectorislocatedatthesupplyairside.(Fire
detector may operate erroneously due to the heated air supplied during heating
operation.)
• Whenspecialchemicalproductmayscatteraroundsuchassitechemicalplants
and hospitals, full investigation is required before installing unit. (The plastic
components may be damaged depending on the chemical product applied.)
• Iftheunitisrunforlonghourswhentheairabovetheceilingisathigh
temperature/high humidity (due point above 26 °C), due condensation may
be produced in the indoor unit. When operating the units in this condition, add
insulation material (10-20 mm) to the entire surface of the indoor unit to avoid
due condensation.
3.1. Installtheindoorunitonaceilingstrongenough
tosustainitsweight
Secure enough access space to allow for the maintenance, inspection, and
replacement of the motor, fan, drain pump, heat exchanger, and electric box in one
of the following ways.
Select an installation site for the indoor unit so that its maintenance access space
will not be obstructed by beams or other objects.
(1)
When a space of 300 mm or more is available below the unit between the unit
and the ceiling (Fig. 3-1-1)
•Createaccessdoor1and2(450x 450 mm each) as shown in Fig. 3-1-2.
(Access door 2 is not required if enough space is available below the unit for a
maintenance worker to work in.)
(2) When a space of less than 300 mm is available below the unit between the unit
and the ceiling (At least 20 mm of space should be left below the unit as shown
in Fig. 3-1-3.)
•Createaccessdoor1diagonallybelowtheelectricboxandaccessdoor3
below the unit as shown in Fig. 3-1-4.
or
•
Create access door 4 below the electric box and the unit as shown in Fig. 3-1-5.
[Fig.3-1-1](P.2)
[Fig.3-1-2](ViewedfromthedirectionofthearrowA)(P.2)
[Fig.3-1-3](P.2)
[Fig.3-1-4](ViewedfromthedirectionofthearrowB)(P.2)
[Fig.3-1-5](ViewedfromthedirectionofthearrowB)(P.2)
ⒶElectric box ⒷCeiling
ⒸCeiling beam ⒹAccess door 2 (450 mm x 450 mm)
ⒺAccess door 1 (450 mm x 450 mm) ⒻMaintenance access space
ⒼSupply air ⒽIntake air
ⒾBottom of indoor unit ⒿAccess door 3
ⓀAccess door 4
Warning:
Theunitmustbesecurelyinstalledonastructurethatcansustainitsweight.
Iftheunitismountedonanunstablestructure,itmayfalldowncausing
injuries.
Warning:
• Thisunitshouldbeinstalledinroomswhichexceedtheoorspace
speciedinoutdoorunitinstallationmanual.Refertooutdoorunit
installationmanual.
• Installtheindoorunitatleast2.5maboveoororgroundlevel.For
appliancesnotaccessibletothegeneralpublic.
• Refrigerantpipesconnectionshallbeaccessibleformaintenancepurpose.
3.2. Securinginstallationandservicespace
• Selecttheoptimumdirectionofsupplyairowaccordingtothecongurationof
the room and the installation position.
• Asthepipingandwiringareconnectedatthebottomandsidesurfaces,andthe
maintenance is made at the same surfaces, allow a proper space properly. For
theefcientsuspensionworkandsafety,provideaspaceasmuchaspossible.
3.3. Indoorunitaccessories
The unit is provided with the following accessories:
No. Name Quantity
①Pipe cover (for refrigerant piping joint) Small diameter 1
②Pipe cover (for refrigerant piping joint) Large diameter 1
③
Bands for temporary tightening of pipe cover and drain hose 6
④Washer 8
⑤Drain hose 1
⑥Pipe cover (for Drain hose) short 1
2. Selectingtheinstallationlocation
2.1. Indoorunit
• Whereairowisnotblocked.
• Wherecoolairspreadsovertheentireroom.
• Whereitisnotexposedtodirectsunshine.
• Atadistance1mormoreawayfromyourTVandradio(topreventpicturefrom
being distorted or noise from being generated).
• Inaplaceasfarawayaspossiblefromuorescentandincandescentlights(so
the infrared remote control can operate the air conditioner normally).
• Wheretheairltercanberemovedandreplacedeasily.
Warning:
Mounttheindoorunitintoaceilingstrongenoughtowithstandtheweightof
theunit.
Theindoormodelsshouldbeinstalledtheceilingoverthan2.5mfromoor.
2.2. Outdoorunit
• Whereitisnotexposedtostrongwind.
• Whereairowisgoodanddustless.
• Whereitisnotexposedtorainanddirectsunshine.
• Whereneighboursarenotannoyedbyoperationsoundorhotair.
• Whererigidwallorsupportisavailabletopreventtheincreaseofoperation
sound or vibration.
• Wherethereisnoriskofcombustiblegasleakage.
• Wheninstallingtheunitatahighlevel,besuretoxtheunitlegs.
• Whereitisatleast3mawayfromtheantennaofTVsetorradio.(Otherwise,
images would be disturbed or noise would be generated.)
• Installtheunithorizontally.
Caution:
Avoidthefollowingplacesforinstallationwhereairconditionertroubleis
liabletooccur.
• Wherethereistoomuchmachineoil.
• Saltyenvironmentasseasideareas.
• Hot-springareas.
• Wheresuldegasexists.
• Otherspecialatmosphericareas.

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4. Fixinghangingbolts
4.1. Fixinghangingbolts
[Fig.4-1](P.3)
ⒶCenter of gravity
(Give site of suspension strong structure.)
Hangingstructure
• Ceiling:Theceilingstructurevariesfrombuildingtooneanother.Fordetailed
information, consult your construction company.
5. Installingtheunit
5.1. Hangingtheunitbody
► Bringtheindoorunittoaninstallationsiteasitispacked.
► Tohangtheindoorunit,usealiftingmachinetoliftandpassthroughthe
hangingbolts.
[Fig.5-1-1](P.3)
ⒶUnit body
ⒷLifting machine
[Fig.5-1-2](P.3)
ⒸNuts(eldsupply)
ⒹWashers (accessory)
ⒺM10hangingbolt(eldsupply)
5.2. Conrmingtheunit’spositionandxinghanging
bolts
► Ensurethatthehangingboltnutsaretightenedtoxthehangingbolts.
► Toensurethatdrainisdischarged,besuretohangtheunitatlevelusing
alevel.
Caution:
Installtheunitinhorizontalposition.Ifthesidewithdrainportisinstalled
higher,waterleakagemaybecaused.
• Ifnecessary,reinforcethehangingboltswithanti-quakesupportingmembersas
countermeasures against earthquakes.
*UseM10forhangingboltsandanti-quakesupportingmembers(eldsupply).
①Reinforcing the ceiling with additional members (edge beam, etc.) must be
required to keep the ceiling at level and to prevent the ceiling from vibrations.
②Cut and remove the ceiling members.
③ Reinforcetheceilingmembers,andaddothermembersforxingtheceiling
boards.
CenterofgravityandProductWeight
Model name W L X Y Z Product Weight (kg)
SEZ-M25 625 752 263 351 106 17.5
SEZ-M35 625 952 286 448 104 21
SEZ-M50 625 952 280 437 104 22
SEZ-M60 625 1152 285 527 104 25.5
SEZ-M71 625 1152 285 527 104 25.5

13
6. Refrigerantpipingwork
6.1. Refrigerantpipe
[Fig.6-1](P.4)
ⓐIndoor unit
ⓑOutdoor unit
Refer to the Instruction Manual that came with the outdoor unit for the restrictions
on the height difference between units and for the amount of additional refrigerant
charge.
Avoid the following places for installation where air conditioner trouble is liable to
occur.
• Wherethereistoomuchoilsuchasformachineorcooking.
• Saltyenvironmentasseasideareas.
• Hot-springareas.
• Wheresuldegasexists.
• Otherspecialatmosphericareas.
• Thisunithasaredconnectionsonbothindoorandoutdoorsides.(Fig.6-1)
• Insulatebothrefrigerantanddrainagepipingcompletelytopreventcondensation.
Pipingpreparation
• Refrigerantpipesof3,5,7,10and15mareavailableasoptionalitems.
(1)Tablebelowshowsthespecicationsofpipescommerciallyavailable.
Model Pipe
Outside diameter
Min wall
thickness
Insulation
thickness
Insulation
material
mm inch
SEZ-
M25
For liquid 6.35 1/4 0.8 mm 8 mm
Heat resisting
foam plastic
0.045specic
gravit
y
For gas 9.52 3/8 0.8 mm 8 mm
SEZ-
M35
For liquid 6.35 1/4 0.8 mm 8 mm
For gas 9.52 3/8 0.8 mm 8 mm
SEZ-
M50
For liquid 6.35 1/4 0.8 mm 8 mm
For gas 12.7 1/2 0.8 mm 8 mm
SEZ-
M60
For liquid 6.35 1/4 0.8 mm 8 mm
For gas 15.88 5/8 1.0 mm 8 mm
SEZ-
M71
For liquid 9.52 3/8 0.8 mm 8 mm
For gas 15.88 5/8 1.0 mm 8 mm
(2) Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
(3) Refrigerant pipe bending radius must be 10 cm or more.
Caution:
Usingcarefulinsulationofspeciedthickness.Excessivethicknessprevents
storagebehindtheindoorunitandsmallerthicknesscausesdewdrippage.
6.2. Flaringwork
• Maincauseofgasleakageisdefectinaringwork.
 Carryoutcorrectaringworkinthefollowingprocedure.
6.2.1. Pipecutting
[Fig.6-2-1](P.4)
ⓐCopper tubes
ⓑGood
ⓒNo good
ⓓTilted
ⓔUneven
ⓕBurred
• Usingapipecuttercutthecoppertubecorrectly.
6.2.2. Burrsremoval
[Fig.6-2-2](P.4)
ⓐBurr
ⓑCopper tube/pipe
ⓒSpare reamer
ⓓPipe cutter
• Completelyremoveallburrsfromthecutcrosssectionofpipe/tube.
• Puttheendofthecoppertube/pipetodownwarddirectionasyouremoveburrs
in order to avoid burrs drop in the tubing.
6.2.3. Puttingnuton
[Fig.6-2-3](P.4)
ⓐFlare nut
ⓑCopper tube
• Removearenutsattachedtoindoorandoutdoorunit,thenputthemonpipe/
tube having completed burr removal.
 (notpossibletoputthemonafteraringwork)
• Usethearenutincludedwiththisindoorunit.
6.2.4. Flaringwork
[Fig.6-2-4](P.4)
ⓐFlaring tool
ⓑDie
ⓒCopper tube
ⓓFlare nut
ⓔYoke
• Carryoutaringworkusingaringtoolasshownbelow.
Pipe diameter
(mm)
Dimension
A (mm)
B +0
-0.4 (mm)
When the tool for R32/R410A
is used
Clutch type
6.35 0 - 0.5 9.1
9.52 0 - 0.5 13.2
12.7 0 - 0.5 16.6
15.88 0 - 0.5 19.7
Firmly hold copper tube in a die in the dimension shown in the table at above.
• Whenreconnectingthedetachedrefrigerantpipes,makesuretoarethem
again.
6.2.5. Check
[Fig.6-2-5](P.4)
ⓐSmooth all around ⓕScratchonaredplane
ⓑInside is shining without any scratches ⓖCracked
ⓒEven length all around ⓗUneven
ⓓToo much ⓘBad examples
ⓔTilted
• Comparethearedworkwithagureinrightsidehand.
• Ifareisnotedtobedefective,cutoffthearedsectionanddoaringwork
again.
6.3. Pipeconnection
[Fig.6-3-1](P.4)
• Applyathincoatofrefrigerationoilontheseatsurfaceofpipe.
• Forconnectionrstalignthecenter,thentightentherst3to4turnsofarenut.
• Usetighteningtorquetablebelowasaguidelineforindoorunitsideunionjoint
section,andtightenusingtwowrenches.Excessivetighteningdamagestheare
section.
Copper pipe O.D.
(mm)
Flare nut O.D.
(mm)
Tightening torque
(N·m)
ø6.35 17 14 - 18
ø9.52 22 34 - 42
ø12.7 26 49 - 61
ø15.88 29 68 - 82
Warning:
Becarefulofyingarenut!(Internallypressurized)
Removethearenutasfollows:
1. Loosenthenutuntilyouhearahissingnoise.
2. Donotremovethenutuntilthegashasbeencompletelyreleased(i.e.,
hissingnoisestops).
3. Checkthatthegashasbeencompletelyreleased,andthenremovethe
nut.
Outdoorunitconnection
Connect pipes to stop valve pipe joint of the outdoor unit in the same manner
applied for indoor unit.
• For tightening use a torque wrench or spanner, and use the same tightening
torque applied for indoor unit.

14
6. Refrigerantpipingwork
6.4. Purgingproceduresleaktest
Tighten the cap to the service port to obtain the initial status.
Pipe length :
7 m maximum
No gas charge is needed.
Pipe length exceeding 7 m
Charge the prescribed
amount of gas.
Remove the gauge manifold valve quickly from the service port of the stop valve.
After refrigerant pipes are connected and evacuated, fully open all stop valves on
gas and liquid pipe sides.
Operating without fully opening lowers the performance and causes trouble.
Retighten the cap
Leak test
6.5. Drainpipingwork
• Ensurethatthedrainpipingisdownward(pitchofmorethan1/100)tothe
outdoor (discharge) side. Do not provide any trap or irregularity on the way. ( ①)
• Ensurethatanycross-wisedrainpipingislessthan20m(excludingthe
difference of elevation). If the drain piping is long, provide metal braces to prevent
it from waving. Never provide any air vent pipe. Otherwise drain may be ejected.
• UseahardvinylchloridepipeO.D.ø32fordrainpiping.
• Ensurethatcollectedpipesare10cmlowerthantheunitbody’sdrainportas
shown in ②.
• Donotprovideanyodortrapatthedraindischargeport.
• Puttheendofthedrainpipinginapositionwherenoodorisgenerated.
• Donotputtheendofthedrainpipinginanydrainwhereionicgasesare
generated.
• Afterconnectingthedrainpiping,makesurethatwaterisdischargedproperly
and that there are no leaks.
[Fig.6-5-1](P.4)
ⒶDownward slope 1/100 or more
ⒷConnection dia. R1 external thread
ⒸIndoor unit
ⒹCollective piping
ⒺMaximize this length to approx. 10 cm
1. Insert the drain hose (accessory) into the drain port.
(The drain hose must not be bent more than 45° to prevent the hose from
breaking or clogging.)
The connecting part between the indoor unit and the drain hose may be
disconnected at the maintenance. Fix the part with the accessory band, not be
adhered.
2. Attachthedrainpipe(O.D.ø32PVCTUBE,eldsupply).
 (Attachthepipewithglueforthehardvinylchloridepipe,andxitwiththeband
(small, accessory).)
3. Perform insulation work on the drain pipe (O.D. ø32 PVC TUBE) and on the
socket (including elbow).
[Fig.6-5-2](P.4)
ⒶIndoor unit
ⒷPipe cover (short) (accessory)
ⒸTie band (accessory)
ⒹBandxingpart
ⒺInsertion margin
ⒻDrain hose (accessory)
ⒼDrainpipe(O.D.ø32PVCTUBE,eldsupply)
ⒽInsulatingmaterial(eldsupply)
ⒾMax.145 ± 5 mm
Refrigerantpipeinsulation
• Afterconnectingrefrigerantpiping,insulatethejoints(aredjoints)withthermal
insulation tubing.
[Fig.6-3-2](P.4)
ⒶPipe cover (small) (accessory)
ⒷCaution:
Pulloutthethermalinsulationontherefrigerantpipingatthesite,insertthearenutto
aretheend,andreplacetheinsulationinitsoriginalposition.
Take care to ensure that condensation does not form on exposed copper piping.
ⒸLiquid end of refrigerant piping ⒹGas end of refrigerant piping
ⒺSite refrigerant piping ⒻMain body
ⒼPipe cover (large) (accessory) ⒽThermalinsulation(eldsupply)
ⒾPull ⒿFlare nut
ⓀReturn to original position ⓁEnsure that there is no gap here
ⓂPlate on main body ⓃBand (accessory)
ⓄEnsure that there is no gap here. Place join upwards.
1. Remove and discard the rubber bung which is inserted in the end of the unit
piping.
2. Flare the end of the site refrigerant piping.
3. Pull out the thermal insulation on the site refrigerant piping and replace the
insulation in its original position.
CautionsOnRefrigerantPiping
► Besuretousenon-oxidativebrazingforbrazingtoensurethatnoforeign
matterormoistureenterintothepipe.
► Besuretoapplyrefrigeratingmachineoilovertheareconnection
seatingsurfaceandtightentheconnectionusingadoublespanner.
► Provideametalbracetosupporttherefrigerantpipesothatnoloadis
impartedtotheindoorunitendpipe.Thismetalbraceshouldbeprovided
50cmawayfromtheindoorunit’sareconnection.
PURGING PROCEDURES
Connect the refrigerant pipes (both the liquid and gas pipes) between the indoor
and the outdoor units.
Remove the service port cap of the stop valve on the side of the outdoor unit gas pipe.
(The stop valve will not work in its initial state fresh out of the factory (totally
closed with cap on).)
Connect the gauge manifold valve and the vacuum pump to the service port of
the stop valve on the gas pipe side of the outdoor unit.
Run the vacuum pump. (Vacuumize for more than 15 minutes.)
Check the vacuum with the gauge manifold valve, then close the gauge manifold
valve, and stop the vacuum pump.
Leave it as is for one or two minutes. Make sure the pointer of the gauge
manifoldvalveremainsinthesameposition.Conrmthatthepressuregauge
show -0.101MPa (-760 mmHg).
*Close
*Open
Hexagonal wrench
Stop valve
*4 to 5 turns
Stop valve
(or the vacuum
pump with the
function to
prevent the back
ow)
Gauge manifold valve
(for R32/R410A)
Pressure gauge
(for R32/R410A)
Compound pressure
gauge (for R32/R410A)
-0.101MPa
(-760 mmHg)
Handle
Low
Handle High
Window
Charge hose
(for R32/R410A)
Vacuum
pump
Adapter for
preventing
thebackow
Charge hose
(for R32/R410A)
Service port
Stop
valve

15
8. Electricalwork
8.1. Powersupply
Electricalspecication Input capacity Main Switch/Fuse (A)
Power supply
(1 phase ~/N, 230V, 50Hz)
SEZ-M25 SEZ-M35 SEZ-M50 SEZ-M60 SEZ-M71
10 10 20 20 20
Warning:
• Thecompressorwillnotoperateunlessthepowersupplyphaseconnection
iscorrect.
• Groundingprotectionwithano-fusebreaker(earthleakagebreaker[ELB])
isusuallyinstalledforⒹ.
• Theconnectionwiringbetweentheoutdoorandindoorunitscanbe
extendeduptoamaximumof50meters,andthetotalextensionincluding
thecrossoverwiringbetweenroomsisamaximumof80m.
Aswitchwithatleast3mmcontactseparationineachpoleshallbeprovided
bytheairconditionerinstallation.
* Labeleachbreakeraccordingtopurpose(heater,unitetc.).
[Fig.8-1](P.5)
ⒶIndoor unit
ⒷOutdoor unit
ⒸWired remote controller
ⒹMain switch/fuse
ⒺGrounding
8.2. Indoorwireconnection
Work procedure
1. Remove 2 screws to detach the electric component cover.
2. Route each cable through the wiring intake into the electric component box.
(Procure power cable and in-out connecting cable locally and use remote
control cable supplied with the unit.)
3. Securely connect the power cable and the in-out connecting cable and the
remote control cable to the terminal blocks.
4. Secure the cables with clamps inside the electric component box.
5. Attach the electric component cover as it was.
• Fixpowersupplycableandindoor/outdoorcabletocontrolboxbyusingbuffer
bushing for tensile force. (PG connection or the like.)
Warning:
• Attachtheelectricalpartcoversecurely.Ifitisattachedincorrectly,itcould
resultinare,electricshockduetodust,water,etc.
• Usethespeciedindoor/outdoorunitconnectingwiretoconnectthe
indoorandoutdoorunitsandxthewiretotheterminalbedsecurelyso
thatnostressisappliedtotheconnectingsectionoftheterminalbed.
Incompleteconnectionorxingofthewirecouldresultinare.
[Fig.8-2-1](P.5)
ⒶScrew holding cover (2pcs)
ⒷCover
[Fig.8-2-2](P.5)
ⒶTerminal bed box
ⒷKnockout hole
ⒸRemove
[Fig.8-2-3](P.5)
ⒺUse PG bushing to keep the weight of the cable and external force from being applied to
the power supply terminal connector. Use a cable tie to secure the cable.
ⒻIndoor/outdoor unit connecting wire
ⒼTensile force
ⒽUse ordinary bushing
ⒾTransmission wiring
[Fig.8-2-4](P.5)
ⒿTerminal bed for power source and indoor transmission
ⓀTerminal bed for remote controller
ⓁIndoor/outdoor unit connecting wire
ⓂTransmission line to the remote controller
[Fig.8-2-5](P.6)
ⒶIndoor terminal block
ⒷEarth wire (green/yellow)
ⒸIndoor/outdoor unit connecting wire 3-core 1.5 mm2or more
ⒹOutdoor terminal block
ⒺPower supply cord
①Connecting cable
Cable 3-core 1.5 mm2, in conformity with Design 245 IEC 57.
②Indoor terminal block
③Outdoor terminal block
④Always install an earth wire (1-core 1.5 mm2) longer than other cables
⑤Remote controller cable
Wire No × size (mm2) : Cable 2C × 0.3
This wire accessory of remote controller
(wire length : 10 m, non-polar. Max. 500 m)
⑥Wired remote controller (option)
⑦Power supply cord
• Performwiringasshownin[Fig.8-2-5](P.6).(Procurethecablelocally.)
Make sure to use cables of the correct polarity only.
• Connecttheterminalblocksasshownin[Fig.8-2-5](P.6).
Caution:
• Usecarenottomakemis-wiring.
• Firmlytightentheterminalscrewstopreventthemfromloosening.
• Aftertightening,pullthewireslightlytoconrmthattheydonotmove.
8.3. Remotecontroller(wiredremotecontroller(option))
8.3.1. Forwiredremotecontroller
1) Installingprocedures
Refer to the installation manual that comes with each remote controller for details.
2) Functionselectionofremotecontroller
If two remote controllers are connected, set one to “Main” and the other to “Sub”.
For setting procedures, refer to “Function selection of remote controller” in the
operation manual for the indoor unit.
8.4. Remotecontroller(wirelessremotecontroller(option))
8.4.1. Forwirelessremotecontroller(option)
1) Installationarea
• Areainwhichtheremotecontrollerisnotexposedtodirectsunshine.
• Areainwhichthereisnonearbyheatingsource.
• Areainwhichtheremotecontrollerisnotexposedtocold(orhot)winds.
• Areainwhichtheremotecontrollercanbeoperatedeasily.
• Areainwhichtheremotecontrollerisbeyondthereachofchildren.
* The signal can travel up to approximately 7 meters (in a streight line) within 45
degrees to both right and left of the center line of the receiver.
2) Installingprocedures
Refer to the installation manual that comes with each remote controller for details.
8.4.2. SignalReceivingUnit
1) Samplesystemconnection
[Fig.8-4-1](P.6)
Indoor/outdoor wiring
Signal receiving unit wiring
ⒶOutdoor unit
ⒷRefrigerant address
ⒸIndoor unit
ⒹSignal receiving unit
7. Ductwork
• When connecting ducts, insert a canvas duct between the main body and the duct.
• Usenon-combustibleductcomponents.
Caution:
• ThenoisefromtheintakewillincreasedramaticallyifintakeⒶistted
directlybeneaththemainbody.IntakeⒶshouldthereforebeinstalledas
farawayfromthemainbodyaspossible.
 Particularcareisrequiredwhenusingitwithbottominletspecications.
• Installsufcientthermalinsulationtopreventcondensationformingon
outletductangesandoutletducts.
• Toconnecttheairconditionermainbodyandtheductforpotential
equalization.
• Toreducetheriskofinjuryfrommetalsheetedges,wearprotective
gloves.
• Toavoidelectricalnoiseinterference,donotruntransmissionlinesatthe
bottomoftheunit.
• Keepthedistancebetweentheinletgrilleandthefanover850mm.
 Ifitislessthan850mm,installasafetyguardnottotouchthefan.
[Fig.7-1](P.5)
ⒶAir inlet
ⒷAir outlet
ⒸAccess door
ⒹCeiling surface
ⒺCanvas duct
ⒻAirlter
ⒼInlet grille

16
Only the wiring from the signal receiving unit and between the remote controllers is
shownin[Fig.8-4-1].Thewiringdiffersdependingontheunittobeconnectedor
the system to be used.
For details on restrictions, refer to the installation manual or the service handbook
that came with the unit.
1. ConnectingtoMr.SLIMairconditioner
(1) Standard 1:1
①Connecting the signal receiving unit
Connect the signal receiving unit to the CN90 (Connect to the wireless remote
controller board) on the indoor unit using the supplied remote controller wire.
Connect the signal receiving units to all the indoor units.
2) Installingprocedures
Refer to the installation manual that comes with each remote controller for details.
8.4.3. Setting
1) Settingthepairnumberswitch
[Fig.8-4-2](P.6)
<Indoorcontrollerboard>
1. Settingmethod
Assign the same pair number to the wireless remote controller as that of the
indoor unit. If not doing so, the remote controller cannot be operated. Refer to
the installation manual that came with the wireless remote controller for how to
set pair numbers of wireless remote controllers.
Position of daisy wire on the controller circuit board on the indoor unit.
Controller circuit board on the indoor unit (reference)
[Fig.8-4-2](P.6)
ⒶCN90: Connector for remote controller wire connection
For pair number settings, the following 4 patters (A-D) are available.
Pair number
setting pattern
Pair number on
remote controller side
Indoor controller circuit board side Point
where the daisy wire is disconnected
A 0 Not disconnected
B 1 J41 disconnected
C 2 J42 disconnected
D 3~9 J41 and J42 disconnected
2. Settingexample
(1) To use the units in the same room
[Fig.8-4-3](P.6)
①Separate setting
Assign a different pair number to each indoor unit to operate each indoor unit
by its own wireless remote controller.
[Fig.8-4-4](P.6)
②Single setting
Assign the same pair number to all the indoor units to operate all the indoor
units by a single wireless remote controller.
[Fig.8-4-5](P.6)
(2) To use the units in different rooms
Assign the same pair number to the wireless remote controller as that of the
indoor unit. (Leave the setting as it is at purchase.)
2) SettingtheModelNo.
①Insert batteries.
②Press the SET button with something sharp at the end.
MODEL SELECT
blinke and Model No. lighted.
③Press the temp button to set the Model No.
④Press the SET button with something sharp at the end.
MODEL SELECT
and Model No. are lighted for three seconds, then turned off.
Indoor Outdoor Model No.
SEZ heat pump models 026
cooling only models 058
8.5. Functionsettings
8.5.1. Forwiredremotecontroller
① [Fig.8-5-1](P.7)
• Select“Service”fromtheMainmenu,andpressthe[SELECT]button.
• Select“Functionsetting”withthe[F1]or[F2]button,andpressthe[SELECT]
button.
②[Fig.8-5-2](P.7)
• Settheindoorunitrefrigerantaddressesandunitnumberswiththe[F1]
through[F4]buttons,andthenpressthe[SELECT]buttontoconrmthe
current setting.
<CheckingtheIndoorunitNo.>
When the [SELECT]button is pressed, the target indoor unit will start fan
operation. If the unit is common or when running all units, all indoor units for the
selected refrigerant address will start fan operation.
③[Fig.8-5-3](P.7)
• Whendatacollectionfromtheindoorunitsiscompleted,thecurrentsettings
appears highlighted. Non-highlighted items indicate that no function settings
are made. Screen appearance varies depending on the “Unit No.” setting.
④[Fig.8-5-4](P.7)
• Usethe[F1]or [F2]button to move the cursor to select the mode number, and
change the setting number with the [F3]or [F4]button.
⑤[Fig.8-5-5](P.7)
• Whenthesettingsarecompleted,pressthe[SELECT]button to send the
setting data from the remote controller to the indoor units.
• Whenthetransmissionissuccessfullycompleted,thescreenwillreturntothe
Function setting screen.
8.5.2. Forwirelessremotecontroller
[Fig.8-5-6](P.7)
ⒶHour button
ⒷMinute button
ⒸTEMP button
ⒹTEMP button
ⒺON/OFF button
ⒻCHECK button
1. Changingtheexternalstaticpressuresetting.
• Besuretochangetheexternalstaticpressuresettingdependingontheduct
and the grill used.
①Go to the function select mode
Press the CHECK button Ⓕtwice continuously.
(Start this operation from the status of remote controller display turned off.)
CHECK
is lighted and “00” blinks.
Press the TEMP button Ⓒonce to set “50”. Direct the wireless remote controller
toward the receiver of the indoor unit and press the Hour button Ⓐ.
②Setting the unit number
Press the TEMP button Ⓒand Ⓓto set the unit number to 01-04 or AL. Direct
the wireless remote controller toward the receiver of the indoor unit and press
the Minute button Ⓑ.
③Selecting a mode
Enter 08 to change the external static pressure setting using the Ⓒand Ⓓ
buttons.
Direct the wireless remote controller toward the receiver of the indoor unit and
press the Hour button Ⓐ.
Current setting number: 1 = 1 beep (one second)
2 = 2 beeps (one second each)
3 = 3 beeps (one second each)
④Selecting the setting number
Use the Ⓒand Ⓓbuttons to change the external static pressure setting to be
used.
Direct the wireless remote controller toward the sensor of the indoor unit and
press the Hour button Ⓐ.
⑤To set the external static pressure
Repeat steps ③and ④to set the mode number to 10.
⑥Complete function selection
Direct the wireless remote controller toward the sensor of the indoor unit and
press the ON/OFF button Ⓔ.
Note:
• Wheneverchangesaremadetothefunctionsettingsafterinstallationor
maintenance,besuretorecordthechangeswithamarkinthe“Check”
columnoftheFunctiontable.
8. Electricalwork

17
9.1. Beforetestrun
► Aftercompletinginstallationandthewiringandpipingoftheindoorand
outdoorunits,checkforrefrigerantleakage,loosenessinthepowersupply
orcontrolwiring,wrongpolarity,andnodisconnectionofonephaseinthe
supply.
► Usea500-voltmegohmmetertocheckthattheresistancebetweenthe
powersupplyterminalsandgroundisatleast1.0MΩ.
► Donotcarryoutthistestonthecontrolwiring(lowvoltagecircuit)
terminals.
Warning:
Donotusetheairconditioneriftheinsulationresistanceislessthan1.0MΩ.
Insulationresistance
After installation or after the power source to the unit has been cut for an
extendedperiod,theinsulationresistancewilldropbelow1MΩduetorefrigerant
accumulating in the compressor. This is not a malfunction. Perform the following
procedures.
1. Remove the wires from the compressor and measure the insulation resistance
of the compressor.
2. Iftheinsulationresistanceisbelow1MΩ,thecompressorisfaultyorthe
resistance dropped due the accumulation of refrigerant in the compressor.
9. Testrun
9.2. Testrun
9.2.1. Usingwiredremotecontroller
■Make sure to read operation manual before test run. (Especially items to secure safety)
Step1 Turnonthepower.
● Remotecontroller:Thesystemwillgointostartupmode,andtheremotecontrollerpowerlamp(green)and“PLEASEWAIT”willblink.Whilethelampandmessage
are blinking, the remote controller cannot be operated. Wait until “PLEASE WAIT” is not displayed before operating the remote controller. After the power is turned on,
“PLEASE WAIT” will be displayed for approximately 2 minutes.
● Indoorcontrollerboard:LED1willbelitup,LED2willbelitup(iftheaddressis0)oroff(iftheaddressisnot0),andLED3willblink.
● Outdoorcontrollerboard:LED1(green)andLED2(red)willbelitup.(Afterthestartupmodeofthesystemnishes,LED2willbeturnedoff.)Iftheoutdoorcontroller
boardusesadigitaldisplay,[-]and[-]willbedisplayedalternatelyeverysecond.
If the operations do not function correctly after the procedures in step 2 and thereafter are performed, the following causes should be considered and eliminated if they are found.
(The symptoms below occur during the test run mode. “Startup” in the table means the LED display written above.)
Symptomsintestrunmode
Cause
RemoteControllerDisplay OUTDOORBOARDLEDDisplay
< > indicates digital display.
Remote controller displays “PLEASE WAIT”,
and cannot be operated.
After “startup” is displayed, only green lights
up. <00>
• Afterpoweristurnedon,“PLEASEWAIT”isdisplayedfor
2 minutes during system startup. (Normal)
After power is turned on, “PLEASE WAIT” is
displayed for 3 minutes, then error code is
displayed.
After “startup” is displayed, green(once) and
red(once) blink alternately. <F1>
• Incorrectconnectionofoutdoorterminalblock(R,S,TandS1,
S2, S3.)
After “startup” is displayed, green(once) and
red(twice) blink alternately. <F3, F5, F9> • Outdoorunit’sprotectiondeviseconnectorisopen.
No display appears even when remote
controller operation switch is turned on.
(Operation lamp does not light up.)
After “startup” is displayed, green(twice) and
red(once) blink alternately. <EA. Eb>
• Incorrectwiringbetweentheindoorandoutdoorunit(Polarity
is wrong for S1, S2, S3.)
• Remotecontrollertransmissionwireshort.
After “startup” is displayed, only green lights
up. <00>
• Thereisnooutdoorunitofaddress0.(Addressisotherthan
0.)
• Remotecontrollertransmissionwireopen.
Display appears but soon disappears even
when remote controller is operated.
After “startup” is displayed, only green lights
up. <00>
• Aftercancelingfunctionselection,operationisnotpossiblefor
about 30 seconds. (Normal)
8. Electricalwork
Functiontable1
Select unit number 00
Mode Settings Mode no.
Setting no. Initial setting Check
Power failure automatic recovery
(AUTO RESTART FUNCTION)
Not available 01 1 *2
Available *1 2 *2
Indoor temperature detecting Indoor unit operating average
02
1
Setbyindoorunit’sremotecontroller 2
Remotecontroller’sinternalsensor 3
LOSSNAY connectivity Not Supported
03
1
Supported (indoor unit is not equipped with outdoor-air intake) 2
Supported (indoor unit is equipped with outdoor-air intake) 3
Functiontable2
Selectunitnumbers01to04orallunits(AL[wiredremotecontroller]/07[wirelessremotecontroller])
Mode Settings Mode no. Setting no. Initial setting Check
Filter sign 100 Hr
07
1
2500 Hr 2
Noltersignindicator 3
External static pressure 15 Pa
08
1
35 Pa 2
50 Pa 3
The same as setting of mode no.08 10 1
5 Pa (set mode no. 08 to 1) 2
*1 When the power supply returns, the air conditioner will start 3 minutes later.
*2 Power failure automatic recovery initial setting depends on the connecting outdoor unit.
Note: When the function of an indoor unit were changed by function selection after the end of installation, always indicate the contents by entering a or other mark in the
appropriatecheckledofthetables.
3. After connecting the wires to the compressor, the compressor will start to warm
up after power is supplied. After supplying power for the times indicated below,
measure the insulation resistance again.
 • Theinsulationresistancedropsduetoaccumulationofrefrigerantinthe
compressor.Theresistancewillriseabove1MΩafterthecompressoris
warmed up for two to three hours.
(The time necessary to warm up the compressor varies according to
atmospheric conditions and refrigerant accumulation.)
 • Tooperatethecompressorwithrefrigerantaccumulatedinthecompressor,
the compressor must be warmed up at least 12 hours to prevent breakdown.
4. Iftheinsulationresistancerisesabove1MΩ,thecompressorisnotfaulty.
Caution:
• Thecompressorwillnotoperateunlessthepowersupplyphaseconnection
iscorrect.
• Turnonthepoweratleast12hoursbeforestartingoperation.
- Starting operation immediately after turning on the main power switch can result
in severe damage to internal parts. Keep the power switch turned on during the
operational season.

18
• Fordescriptionofeachcheckcode,refertothefollowingtable.
①Check code Symptom Remark
P1 Intake sensor error
P2, P9 Pipe (Liquid or 2-phase pipe) sensor error
E6, E7 Indoor/outdoor unit communication error
P4 Drain sensor error
P5 Drain pump error
PA Forced compressor error
P6 Freezing/Overheating safeguard operation
EE Communication error between indoor and outdoor units
P8 Pipe temperature error
E4 Remote controller signal receiving error
Fb Indoor unit control system error (memory error, etc.)
PL Refrigerant circuit abnormal
E0, E3 Remote controller transmission error
E1, E2 Remote controller control board error
E9 Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
For details, check the LED display
of the outdoor controller board.
UP Compressor overcurrent interruption
U3, U4 Open/short of outdoor unit thermistors
UF Compressor overcurrent interruption (When compressor locked)
U2 Abnormalhighdischargingtemperature/49Cworked/insufcientrefrigerant
U1, Ud Abnormal high pressure (63H worked)/Overheating safeguard operation
U5 Abnormal temperature of heat sink
U8 Outdoor unit fan safeguard stop
U6 Compressor overcurrent interruption/Abnormal of power module
U7 Abnormality of super heat due to low discharge temperature
U9, UH Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit/
Current sensor error
Others Other errors (Refer to the technical manual for the outdoor unit.)
• Onwiredremotecontroller
①Check code displayed in the LCD.
Step2 Switchtheremotecontrollerto“Testrun”.
①Select“Testrun”fromtheServicemenu,andpressthe[SELECT]button.[Fig.9-2-1](P.8)
②Select“Testrun”fromtheTestrunmenu,andpressthe[SELECT]button.[Fig.9-2-2](P.8)
③The test run operation starts, and the Test run operation screen is displayed.
Step3 Performthetestrunandchecktheairowtemperature.
①Pressthe[F1]buttontochangetheoperationmode.[Fig.9-2-3](P.8)
Cooling mode: Check that cool air blows from the unit.
Heating mode: Check that warm air blows from the unit.
Step4 Conrmtheoperationoftheoutdoorunitfan.
The speed of the outdoor unit fan is controlled in order to control the performance of the unit. Depending on the ambient air, the fan will rotate at a slow speed and will keep
rotatingatthatspeedunlesstheperformanceisinsufcient.Therefore,theoutdoorwindmaycausethefantostoprotatingortorotateintheoppositedirection,butthisis
not a problem.
Step5 Stopthetestrun.
①Pressthe[ON/OFF]buttontostopthetestrun.(TheTestrunmenuwillappear.)
Note: If an error is displayed on the remote controller, see the table below.
9. Testrun
9.2.2. Usingwirelessremotecontroller(option)
[Fig.9-2-4](P.8)
ⒶTEST RUN button
ⒷMODE button
ⒸFAN button
ⒹVANE button
①Turn on the power to the unit at least 12 hours before the test run.
②Press the TEST RUN button Ⓐtwice continuously.
(Start this operation from the status of remote controller display turned off.)
TEST RUN
and current operation mode are displayed.
③Press the MODE button Ⓑto activate COOL mode, then check whether cool air
is blown out from the unit.
④Press the MODE button Ⓑto activate HEAT mode, then check whether warm
air is blown out from the unit.
⑤Press the FAN button Ⓒand check whether fan speed changes.
⑥Press the ON/OFF button to stop the test run.
Note:
• Pointtheremotecontrollertowardstheindoorunitreceiverwhile
followingsteps②to⑥.
• ItisnotpossibletoruntheinFAN,DRYorAUTOmode.

19
9. Testrun
[OutputpatternA]Errorsdetectedbyindoorunit
Wireless remote controller Wired remote
controller
Symptom Remark
Beeper sounds/OPERATION
INDICATORlampashes
(Number of times)
Check code
1 P1 Intake sensor error
2 P2, P9 Pipe (Liquid or 2-phase pipe) sensor error
3 E6, E7 Indoor/outdoor unit communication error
4 P4 Drain sensor error
5 P5 Drain pump error
6 P6 Freezing/Overheating safeguard operation
7 EE Communication error between indoor and outdoor units
8 P8 Pipe temperature error
9 E4 Remote controller signal receiving error
10 – –
11 – –
12 Fb Indoor unit control system error (memory error, etc.)
14 PL Refrigerant circuit abnormal
No sound – – No corresponding
[OutputpatternB]Errorsdetectedbyunitotherthanindoorunit(outdoorunit,etc.)
Wireless remote controller
Symptom Remark
Beeper sounds/OPERATION INDICATOR
lampashes(Numberoftimes)
1 Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)
For details, check the LED
display of the outdoor controller
board.
2 Compressor overcurrent interruption
3 Open/short of outdoor unit thermistors
4 Compressor overcurrent interruption (When compressor locked)
5Abnormalhighdischargingtemperature/49Cworked/insufcientrefrigerant
6 Abnormal high pressure (63H worked)/Overheating safeguard operation
7 Abnormal temperature of heat sink
8 Outdoor unit fan protection stop
9 Compressor overcurrent interruption/Abnormal of power module
10 Abnormality of super heat due to low discharge temperature
11 Abnormality such as overvoltage or voltage shortage and abnormal
synchronous signal to main circuit/Current sensor error
12 –
13 –
14 Other errors (Refer to the technical manual for the outdoor unit.)
*1Ifthebeeperdoesnotsoundagainaftertheinitialtwobeepstoconrmtheself-checkstartsignalwasreceivedandtheOPERATIONINDICATORlampdoes
notcomeon,therearenoerrorrecords.
*2Ifthebeepersoundsthreetimescontinuously“beep,beep,beep(0.4+0.4+0.4sec.)”aftertheinitialtwobeepstoconrmtheself-checkstartsignalwas
received,thespeciedrefrigerantaddressisincorrect.
• Onwirelessremotecontroller
The continuous buzzer sounds from receiving section of indoor unit.
Blink of operation lamp
• Onwiredremotecontroller
Check code displayed on the LCD.
• Iftheunitcannotbeoperatedproperlyaftertheabovetestrunhasbeenperformed,refertothefollowingtabletoremovethecause.
Symptom Cause
Wired remote controller LED 1, 2 (PCB in outdoor unit)
PLEASE WAIT For about 2 minutes
following power-on
After LED 1, 2 are lighted, LED 2 is turned off,
then only LED 1 is lighted. (Correct operation)
• Forabout2minutesafterpower-on,operationofthe
remote controller is not possible due to system start-up.
(Correct operation)
PLEASE WAIT →Error code
After about 2 minutes
has expired following
power-on
Only LED 1 is lighted. →LED 1, 2 blink.
• Connectorfortheoutdoorunit’sprotectiondeviceisnot
connected.
• Reverseoropenphasewiringfortheoutdoorunit’spower
terminal block (L1, L2, L3)
Display messages do not appear
even when operation switch is
turned ON (operation lamp does
not light up).
Only LED 1 is lighted. →LED 1, 2 blinks
twice, LED 2 blinks once.
• Incorrectwiringbetweenindoorandoutdoorunits
(incorrect polarity of S1, S2, S3)
• Remotecontrollerwireshort
On the wireless remote controller with conditions above, following phenomena takes place.
• Nosignalsfromtheremotecontrollerareaccepted.
• OPElampisblinking.
• Thebuzzermakesashortpingsound.
Note:
Operationisnotpossibleforabout30secondsaftercancellationoffunctionselection.(Correctoperation)
For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.
LED 1 (power for microcomputer) Indicates whether control power is supplied. Make sure that this LED is always lit.
LED 2 (power for remote controller) Indicates whether power is supplied to the remote controller. This LED lights only in the case of the
indoor unit which is connected to the outdoor unit refrigerant address “0”.
LED 3 (communication between indoor and outdoor units) Indicates state of communication between the indoor and outdoor units. Make sure that this LED is
always blinking.

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10. Maintenance
10.1. Gascharge
[Fig.10-1](P.8)
ⒶIndoor unit
ⒷUnion
ⒸLiquid pipe
ⒹGas pipe
ⒺStop valve
ⒻOutdoor unit
ⒼRefrigerant gas cylinder operating valve
ⒽRefrigerant gas cylinder for R32/R410A with siphon
ⒾRefrigerant (liquid)
ⒿElectronic scale for refrigerant charging
ⓀCharge hose (for R32/R410A)
ⓁGauge manifold valve (for R32/R410A)
ⓂService port
1. Connectgascylindertotheserviceportofstopvalve(3-way).
2. Executeairpurgeofthepipe(orhose)comingfromrefrigerantgas
cylinder.
3. Replenishspeciedamountofrefrigerant,whilerunningtheair
conditionerforcooling.
Note:
Incaseofaddingrefrigerant,complywiththequantityspeciedfortherefrigerating
cycle.
Caution:
• Donotdischargetherefrigerantintotheatmosphere.
 Takecarenottodischargerefrigerantintotheatmosphereduring
installation,reinstallation,orrepairstotherefrigerantcircuit.
• Foradditionalcharging,chargetherefrigerantfromliquidphaseofthegas
cylinder.
 Iftherefrigerantischargedfromthegasphase,compositionchangemay
occurintherefrigerantinsidethecylinderandtheoutdoorunit.Inthis
case,abilityoftherefrigeratingcycledecreasesornormaloperationcanbe
impossible.However,chargingtheliquidrefrigerantallatoncemaycause
thecompressortobelocked.Thus,chargetherefrigerantslowly.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm
water(under40°C)duringcoldseason.Butneverusenakedreorsteam.
9. Testrun
9.3. AUTORESTARTFUNCTION
Indoorcontrollerboard
This model is equipped with the AUTO RESTART FUNCTION.
When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are memorized by the indoor controller board.
The auto restart function sets to work the moment the power has restored after power failure, then, the unit will restart automatically.
Set the AUTO RESTART FUNCTION using the remote controller. (Mode no.01)