035T78001-000 MODELS MHC-MHH/MOC-MOH 07 MHC-MHH/MOC-MOH 09 MHC-MHH/MOC-MOH 12 MHC-MHH/MOC-MOH 18 MHC-MHH/MOC-MOH 25 MHC-MHH/MOC-MOH 35 Installation Manual EN Manuel d’installation FR Installationsanleitung DE Manual de instalación ES Installatiehandleiding NL Installationshandledning SE Manuale d’installazione IT Manual de Instalação PT Εγειρίδι Εγκατάστασης GR Installation Manual Installation Manual MINISPLIT HIGH WALL AIR CONDITIONER 01EN_01Cover 14/3/01, 09:59 1
•Please read this installation manual carefully before starting installation of the unit.•This air conditioning system contains refrigerant under pressure, rotating parts andelectrical connection which may be dangerous and can cause injury. Installationand maintenance of this air conditioning system should only be carried out by trainedand qualified personnel.
•After unpacking, please check the unit carefully for possible damage.•Before undertaking any work on the unit, make sure that the power supply hasbeen disconnected.
CAUTIONS FOR INSTALLATION
Do not install in a place where flammable gas mayleak.
It may cause fire.
Do not store or unpack the unit in a wet area or exposeto rain or water.
It may cause the unit to short circuit and may result electricshocks or fire.
Do not conduct installation in wet area or in the rain.
It is a high risk to cause the electrical shocks.
This system is designed for domestic or residentialuse only.
If used in certain envionments, such as a manufacturingworkplace, the equipment may not function efficiently.
• Before doing any work, check the interior power supply cord and the main breaker capacity are sufficient and theinstallation area is sufficient and complies with the requirements.
• Check that the power supply available agrees with nameplate voltage.• Electrical work, wiring and cables must be performed in compliance with national and local wiring codes and
standard.• Do not use the extension cables. In the case extended cables are needed, use the terminal block.
SELECTION OF THE LOCATION
• Select a place which provides the space around the units as shown in the diagram below.
ModelsMHC-MHH/MOC-MOH
07 09 12 18 25 35
A 60cm 60cm 60cm 60cm 60cm 60cm
B 70cm 70cm 70cm 70cm 70cm 70cm
C 60cm 60cm 60cm 60cm 60cm 60cm
D 10cm 10cm 10cm 10cm 10cm 10cm
ModelsMHC-MHH/MOC-MOH
07 09 12 18 25 35
A 20cm 20cm 20cm 20cm 20cm 40cm
B 60cm 60cm 60cm 60cm 60cm 80cm
C 40cm 40cm 40cm 40cm 40cm 20cm
D 20cm 20cm 20cm 20cm 20cm 30cm
Outdoor
Cautions
• Do not install in a place that cannot bear the weight of the unit.
Indoor
497133.5 133.5
248
230
268
517144 144
296
260
316
429
150 550 150
100100
64
6423
431
5
287
2424
335MO 07-12
MO 18
MO 25-35
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ENGLISH 7
EN
Installation of the outdoor unit in a place exposedregularly to a strong wind.
Installation of the indoor unit in a place where thereis an obstacle near the air inlet or outlet.
Installation of the indoor unit at too low a position
Installation of outdoor units too close or, blowingdischarged air into each other.
Installation of the indoor unit in direct sun light.
Installation in the unit in wrong direction.
INSTALLATION IN THE FOLLOWING PLACES MAY RESULT IN TROUBLE
10 c
m
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8 ENGLISH
INSTALLATION DIAGRAM
Auto louver (vertical)
Manual louver (horizontal)
10 cm or more
20 cm or more
20 cm or more
60 cm or moreVinyl tape
Gas side piping
Liquid side piping
Additional drain hose
Connecting cable
Vinyl tape
Apply after carrying out a drainage
test.
* To carry out the drainage test,
remove the air filters and pour
water into the heat exchanger.
60 cm or more
Installation plate
Remove the cover plate screw
to have access to the terminal
board.
70 cm or more
60 cm or more
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EN
INSTALLATIONPROCEDURE
INDOOR UNIT
� Fixing• Place the installation guide pattern on the designated
installation place and mark the hole position.• Drill a hole and mount installation plate
• After determining the pipehole position. Drill the holeat a slight downward slanttowards the outdoor side.
Note : When installingthe refrigerant pipes fromothers side. A hole mustbe place to allow falltowards the outdoor unit.
• Make ø5mm. 4-6 holes, in the wall at the four cornersof mouting plate (bracket) then insert appropriatemouting devices.
• Install the mounting plate using 4-6 pieces of mountingscrew securely at four corners and tighten the screwcompletely. Do not over tighten the screws and deformthe back plate.
Cautions
• Be careful when handling the sharp edge of themounting plate.
� Wiring• This indoor unit is ready for connection to the outdoor
unit.
Cautions
• Never modify the unit by removing any of the safetyguards or by bypassing any of the safety interlockswithces.
• Connect the interconnecting cable correctly andconnect the connecting cable to terminal as identifiedwith their respective marking.
• Do not damage the conductor core or inner insulationof power supply cables and do not deform or crushthe cables.
� Piping
The auxiliary piping can be connected in the diectionsshown the above diagram. To connect in the D, E and Fdirection, pipes will need to be extended.
Cautions
• Bend pipes carefully to avoid flattening or obstructingthem if the pipes are bent incorrectly, the indoor unitmay be unstable on the wall.
• Carefully arrange pipes so that pipes do not stick outof the rear plate of the indoor unit
5
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Outdoor
Indoor
ø70 mm
A Right
B Right
C Right F Left
E Rear Bottom
D Right
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10 ENGLISH
� Drain hose• Drain hose is flexible and can be routed to suit various
piping arrangements. The drain line must include elbowtrap (U bend). Connect a plastic condensate pipe withan internal diameter of 12 mm.
Note: Do not put the drain hose end into water.
• The drain hose can be connected to the left or theright side.
For left and left rear piping
For left and left rear piping
Verification of condensate water drainge:Fill the drain pan with water and observe evacuation.
� Indoor Unit Fixing• Thread the indoor unit piping and cable through the
hole.• Hang the top of the unit onto the upper ridge of them
in mounting plate.• Make sure that the unit is correctly hung in place by
sliding it to the left, then to the right.• Press the bottom left and bottom right hand corners of
the unit against the mounting plate until the fixingprongs click into place in the retainers provided to thateffect.
(MHC-MHH/MOC-MOH 07, 09, 12 only)
• For the model MHC-MHH 18, 25 and 35, install thecentral mounting bracket as shown in the belowdiagram.
(MHC-MHH18, 25 and 35)
(MHC-MHH18, 25 and 35)
Note: The condensate evacuation line should be taped tothe refrigerant lines with vinyl tape.
Drain hose
Drain cap
Drain hose
Drain cap
Drainage line
Interconnection cable
Mounting Plate
Central Mounting Bracket
Condensatedrainage line
a
Condensatedrainage line
a) Access plate for thecondensate drainagepump detection(condensate pump isavailable as anaccessorey).
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ENGLISH 11
- Evacuate the piping. This operation, which should lastat least 15 minutes if there are large piping lengthsand changes in elevation, should be followed by a leaktest.To this effect, when the piping has been evacuated,close the pressure gauge tap, note the value on thegauge, then wait for 15 minutes. If the needle moves,there is a leak in the system. Make the necessaryadjustments or repairs and repeat this procedure untilthe needle no longer moves.
- Open the service valves and top up the refrigerantcharge if necessary.
This unit is shipped complete with a charge of R22 refrigerantthat will be sufficient for an interconnecting piping length of5 meters.
Installation
Minimum thickness 6 mm
Low pressure
Gas valveLiquid valve
Pressure tap
OUTDOOR UNIT� Fixing and Piping• Piping must be performed by qualified personnel
according to good refrigeration systems practices.• Piping materials and insulation materials must be of
refrigerant quality.• Select the pipe diameters according to the size of unit
and cut the pipe to design length by using pipe cutter.• Install the flare nuts and flare the end of the pipes.• Check that no foreign bodies are inside the piping.• Align the central of the connecting pipes and tighten
the flare nut.• Fix piping with pipe clamps and check that any pipe
vibrations cannot be transmitted to the buildingstructure.
Note• Connect the pipe correctly.• Do not apply the excessive torque.• Use an appropriate bending tool to form curves and
avoid over-tightening the refrigerant tubes.• To prevent heat loss, the two lines must be insulated
separately.
� Maximum piping lengths
Note : Where the difference in elevation between the indoorunit and the outdoor unit is greater than 5 meters,install an oil trap every 5 meters.
The suction line must have a 2% gradient up to thecompressor on horizontal sections.Where piping lengths are unusually long and include alarge number of oil traps, it may be necessary to adjustto compressor charge.
Refrigerant charge to be added per extrametre of piping length when more than 7.5meters.
The indoor unit and interconnecting voltage is 220volts. Where the outdoor unit requires a differentoperating voltage such as 24 volts one of the followingsolutions can be applied.1. The coil of the relay switching the compressor and
reversing valves should be changed to 220V.2. A transformer should be installed to sypply 24 volts
and a relay installed with a 220 volt coil to switch the24 volts required by the outdoor units. The transformershould not be energised at all times and not switchedby the start signal from the indoor unit. Switching thetransformer directly will cause electronic noise whichmay cause malfunction of the electronics.
� Wiring
L N 1 2
For further detail on wiring of these units, see the diagrams pastedinside each unit
Cautions• Never modify the unit by removing any of the safety
guards or by bypassing any of the safety interlockswithces.
• Connect the connecting cable correctly and connectthe connecting cable to terminal as identified with theirrespective marks.
• Do not scratch the conductive core & inner insulator ofpower supply cables and do not deform or smash onthe surface of cables.
� Electrical ConnectionsAll electrical wiring and connections must comply withlocal codes and standards. Power supply cord andinterconnection cord used must not be lighter thanPolychloroprene sheated cord (245 IEC 57 or H05RN-F).Disconnecting device must have a contact separationof at least 3 mm.
MHC-07-35 -Cooling Only
1 2
1NL 2
N
��
MHH-07-35 -Heat Pump
1 2
1NL 2
N
��
3
3
For correct installation, a proper ground connection must bemade for unit.
Wiring sizes
Or as required to meet national and local codes.
Note
• Terminals N and 1 (see diagrams above) correspondto power supply to the indoor unit coming from theoutdoor unit.
• Compressor power supply is established by teminal 2.• Power supply to the 4-way valve is established by
terminal 3.• For further details on wiring of these units, see the
• Check the flare nut connections, valve stem cap connections and service cap connections for gas leak with a leakdetector or soap water.
Indoor
• Check the unit is firmly fixed.• Check the connecting pipes are tighten securely.• Check the pipe insulation.• Check the drainage.• Check the connection of the grounding wire.
SYSTEM TEST DIAGNOSTICSTest Operation Mode
1) This is a diagnostic mode to check the functioning of a unit. In installations with multiple units it is possible to startthe Test Operation Mode in all the units sequenially and run the test mode in parallel, thus shortening the time forservice calls. By consulting the status of each unit a diagnosis can be made of any problems or normal operationcan be verified.
2) Test Operation mode carries out the following operational sequence and then returns to the normal mode afterthe Test operation is finished. In the case of Cool only systems the sequence will be completed after STEP 2. If aproblem is encountered during Test Operation mode the unit will indicate this as shown in the chart below and theLED Display will flash according to the LED Diagnostic Codes. If an error occurs the reset shall be when the EMSswitch is pressed for more than 1 second and less than 10 seconds. Upon release, the operation shall return tonormal and the unit shall be off.
3) To start this mode, the emergency switch must be pressed for at least 10 seconds and released while in normaloperation mode. To interrupt this mode, press the emergency switch again for at least 10 seconds.
4) If a failure occurs during the test mode operation the unit the board shall:-- Stop the operating of compressor- Indicate the error by the lamp out puts- Remain in that condition until reset
Test Operation Mode
Any timer settings entered before the start of the Test Operation Mode will not be affected by the Test Operation Mode.
Failure display follows the conditions below.Status Operation Terminating ConditionLow HP temp < 20˚C fan stop and louver full open Coil temp 20˚CCoil temp > 40˚C (cooling) fan stop and louver full open Coil temp 40˚COverheat > 62˚C (heating) louver full open Coil temp 50˚CAnti Freeze louver full open Coil temp 5˚CLow voltage halt return to normal rangeSensor fail stop system resetCooling fail stop system resetHeating fail stop system reset
In cool only mode InputOperation time
MinutesSTEP 1 Fan only high 3STEP 2 Cool mode : fan high 4 Diagnostic
Cool mode : fan med 2Cool mode : fan low 3
STEP 3 Stop Waiting 3STEP 4 Heating mode : fan high 4 Diagnostic
Heating mode : fan med 2Heating mode : fan low 3
STEP 5 Waiting 3
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TROUBLE SHOOTING GUIDE
Probable cause
1. Power Failure.2. Fuse blown or circuit breaker
open.3. Voltage is too low.4. Faulty contactor or relay.5. Electrical connections loose.6. Thermostat adjustment too low
3. The room was probably very hot(cool) when you started thesystem.
1. Thermostat adjustment too low(in heating mode) or too high (incooling mode)
2. Faulty fan.3. Refrigerant charge too low, leak.4. Air or incondensables in
refrigerant circuit.
1. Too much or too little refrigerant.
2. Faulty compressor.
3. Air or incondensables inrefrigerant circuit.
4. Changeover valve damaged orblocked open (heat pump unit)
In heating or cooling operation anyplastic parts may expand or shrinkdue to a sudden temperatue changein this event, a clicking sound mayoccur.
Remedy
1. Wait for Power resume.2. Replace the fuse or reset the
breaker.3. Find the cause and fix it.4. Replace the faulty component.5. Retighten the connection.6. Check Thermostat setting.
7. Find the cause then replaceCapacitor.
8. Check and retighten.9. Find the cause before reset.
1. Check the wiring and thecompressor winding resistance.
2. Find the cause then replaceCapacitor.
1. Remove charge, repair, evacuateand recharge.
2. Insulate them separately.
3. Wait while unit has enough time tocool the room.
1. Check Thermostat setting.
2. Check condenser air circulation.3. Find leak, repair and recharge.4. Remove charge, evacuate and
recharge.
1. Remove charge, evacuate andrecharge.
2. Determine the cause and replacecompressor.
3. Remove charge, evacuate andrecharge.
4. Replace it.
In heating or cooling operation anyplastic parts may expand or shrink dueto a sudden temperatue change in thisevent, a clicking sound may occur.
Problem
A. The air conditioner does not run.
B. The outdoor fan runs but thecompressor will not start.
C. There is insufficient heating orcooling.
D. The compressor runcontinuously.
E. The compressor starts but shutsdown quickly.
F. Clicking sound is heard fromthe air conditioner.
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ENGLISH 15
DIAGNOSTIC INFORMATION FUNCTION
X = ON, O = OFF, F-1 = ON : 0.5 sec, OFF : 0.5 secF-2 = ON : 1.5 sec, OFF : 0.5 secF-3 = ON : 0.5 sec, OFF : 1.5 sec
Notes1) In emergency mode, the Power light will flash and the other lights will indicate the operation as above.2) Lights will flash during the time that the units is held off, due to Low Voltage. If the voltage has passed through
the reset voltage and the unit is waiting for the time delay, the lights will go to normal operation.3) The lights will show the LED Diagnostic Code even when the unit is off.
Status Power Timer Operation Mode
OFF(with power on) O O O Normal OperationON (Temperature satisfied) X O O Normal OperationWaiting for delay X F-1 O Normal OperationCompressor started X O X Normal OperationSleep mode X X X/O Normal OperationStart timer set X F-2 X/O Normal OperationStop timer set X F-3 X/O Normal OperationLow HP temp < 20°C X O F-1 ProtectionCoil temp > 40°C (cooling) X O F-2 ProtectionOverheat > 62° (heating) X F-1 F-1 ProtectionAnti Freeze X F-2 F-2 ProtectionLow voltage F-2 O O ProtectionSensor fail F-1 O F-1 Reset-Call Service TechnicianCooling fail F-2 O F-2 Reset-Call Service TechnicianHeating fail F-3 O F-3 Reset-Call Service TechnicianEmergency operation F-3 Note 1 Note 1 OperationalTest operation F-1 F-1 F-1 OperationalFilter F-3 F-3 F-3 Protection
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16 ENGLISH
TECHNICAL SPECIFICATION
ModelIndoor Unit
MHC-MHH
07 09 12 18 25 35
MOC-MOHOutdoor Unit
07 09 12 18 25 35
Power Supply V/Ph/Hz 220-240/1/50 or 380-415/3/50
Ph 1 1 1 1 1 3 1 3
Maximum Power Consumption kW 0.7 0.85 1.2 2.0 2.8 2.71 3.37 3.29
Running Current A 3.5 4.5 5.6 9.1 11.5 5.34 16.26 6.65
Fuse Size A 10 10 10 16 20 10 32 16
Compressor Type Rotary Rot./Rec. Reciprocating Reciprocating
This product contains refrigerant under pressure, rotating parts, and electrical connections which may be adanger and cause injury!
All work must only be carried out by competent persons using suitable protective clothing and safety precautions.
Read the Manual Risk of electric shock Unit is remotely controlled andmay start without warning
1. Isolate all sources of electrical supply to the unit including any control system supplies switched by the unit. Ensurethat all points of electrical and gas isolation are secured in the OFF position. The supply cables and gas pipework maythen be disconnected and removed. For points of connection refer to unit installation instructions.
2. Remove all refrigerant from each system of the unit into a suitable container using a refrigerant reclaim or recovery unit.This refrigerant may then be re-used, if appropriate, or returned to the manufacturer for disposal. Under Nocircumstances should refrigerant be vented to atmosphere. Where appropriate, drain the refrigerant oil from eachsystem into a suitable container and dispose of according to local laws and regulations governing disposal of oilywastes.
3. Packaged unit can generally be removed in one piece after disconnection as above. Any fixing down bolts should beremoved and then unit lifted from position using the points provided and equipment of adequate lifting capacity.Reference MUST be made to the unit installation instructions for unit weight and correct methods of lifting. Note thatany residual or spilt refrigerant oil should be mopped up and disposed of as described above.
4. After removal from position the unit parts may be disposed of according to local laws and regulations.
