Full Text Searchable PDF User Manual
AIR CONDITIONER (MULTI-SPLIT TYPE)
Installation Manual
Outdoor Unit
Model name:
RAS-3M18S3AV-E
RAS-2M18S3AV-E
RAS-2M14S3AV-E
* NOTE:
Descriptions about operations for the 3 indoor units in
this manual are not applicable to RAS-2M18S3AV-E
and RAS-2M14S3AV-E.
English
Installation Manual
Outdoor Unit
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Installation Manual
Outdoor Unit
Contents
1
Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2
Installation / service tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Speci
fi
cations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4
Installation parts, accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5
Installation of outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6
Refrigerant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7
Electrical work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
9
Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
10 Pump-down Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Please read this Installation Manual carefully before installing the Air Conditioner.
• This Manual describes the installation method of the outdoor unit.
• For installation of the indoor unit, refer to the Installation Manual attached to the indoor unit.
IMPORTANT NOTICE
For details on how to install the indoor units, refer to the installation manual accompanying the indoor units.
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Installation Manual
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1
Precautions for safety
The manufacturer shall not assume any liability for the damage caused by not observing the
description of this manual.
Be sure to read this installation manual carefully before installing.
The supplied CD-ROM contains the installation manual translated into many languages.
Recommend to the owner to perform maintenance periodically when using over long periods
of time.
This appliance can be used by children aged from 8 years and above and persons with
reduced physical, sensory or mental capabilities or lack of experience and knowledge if they
have been given supervision or instruction concerning use of the appliance in a safe way and
understand the hazards involved.
Children shall not play with the appliance. Cleaning and user maintenance shall not be made
by children without supervision.
Be sure to follow the precautions provided here to avoid safety risks. The symbols and their
meanings are shown below.
DANGER
It indicates that incorrect use of this unit can result in a high possibility of
severe injury(*1) or death.
WARNING
It indicates that incorrect use of this unit may cause severe injury or
death.
CAUTION
It indicates that incorrect use of this unit may cause personal injury(*2),
or property damage(*3).
*1: A severe injury refers to blindness, injury, burns (hot or cold), electrical shock, bone
fracture, or poisoning that leaves after effects and requires hospitalization or extended
out-patient treatment.
*2: Personal injury means a slight accident, burn, or electrical shock which does not
require admission or repeated hospital treatment.
*3: Property damage means greater damage which affects assets or resources.
For general public use
Power supply cord of parts of appliance for outdoor use shall be at least polychloroprene
sheathed flexible cord (design H07RN-F) or cord designation 60245 IEC66 (1.5 mm
2
or
more). (Shall be installed in accordance with national wiring regulations.)
This appliance is not intended for use by person (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.
Children should be supervised to ensure that they do not play with the appliance.
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Installation Manual
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CAUTION
New refrigerant air conditioner installation
THIS AIR CONDITIONER USES THE NEW HFC REFRIGERANT (R410A), WHICH DOES
NOT DESTROY THE OZONE LAYER.
R410A refrigerant is apt to be affected by impurities such as water, oxidizing membranes,
and oils because the pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22.
As well as the adoption of this new refrigerant, refrigerating machine oil has also been
changed. Therefore, during installation work, be sure that water, dust, former refrigerant,
or refrigerating machine oil does not enter the refrigeration cycle of a new-refrigerant air
conditioner. To avoid mixing refrigerant and refrigerating machine oil, the sizes of charging
port connecting sections on the main unit are different from those for the conventional
refrigerant, and different size tools are also required. For connecting pipes, use new and
clean piping materials with high pressure withstand capabilities, designed for R410A only,
and ensure that water or dust does not enter. Moreover, do not use any existing piping as its
pressure withstand may be insufficient and may contain impurities.
DANGER
• The manufacturer shall not assume any liability for the damage caused by not observing
the description of this manual.
• For use by qualified persons only.
• Means for disconnection from the supply having a contact separation of at least 3 mm in
all poles must be incorporated in the fixed wiring.
• Turn off main power supply before attempting any electrical work. Make sure all power
switches are off. Failure to do so may cause electric shock.
• Connect the connecting cables correctly. If the connecting cables are connected wrongly,
electric parts may be damaged.
• Check the earth wire that it is not broken or disconnected before installation.
• Do not install near concentrations of combustible gas or gas vapors. Failure to follow this
instruction can result in fire or explosion.
• To prevent overheating the indoor unit and causing a fire hazard, place the unit well away
(more than 2 m) from heat sources such as radiators, heaters, furnace, stoves, etc.
• When moving the air conditioner for installing it in another place again, be very careful
not to get the specified refrigerant (R410A) with any other gaseous body into the
refrigeration cycle. If air or any other gas is mixed in the refrigerant, the gas pressure in
the refrigeration cycle becomes abnormally high and it resultantly causes burst of the pipe
and injuries on persons.
• In the event that the refrigerant gas leaks out of the pipe during the installation work,
immediately let fresh air into the room. If the refrigerant gas is heated by fire or something
else, It causes generation of poisonous gas.
• When installing or re-installing the air conditioner, do not inject air or other substances
besides the designated refrigerant “R410A” into the refrigerating cycle.
If air or other substances are mixed, an abnormal pressure can occur in the refrigerating
cycle, and this can cause an injury due to a pipe rupture.
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WARNING
• Do not use any refrigerant different from the one specified for complement or replacement.
Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which
may result in a failure or explosion of the product or an injury to your body.
• Installation work must be requested from the supplying retail dealership or professional
vendors. Self-installation may cause water leakage, electrical shock, or fire as a result of
improper installation.
• Specified tools and pipe parts for model R410A are required, and installation work must
be done in accordance with the manual. HFC type refrigerant R410A has 1.6 times more
pressure than that of conventional refrigerant (R22). Use the specified pipe parts, and
ensure correct installation, otherwise damage and/or injury may be caused. At the same
time, water leakage, electrical shock, and fire may occur.
• Be sure to install the unit in a place which can sufficiently bear its weight. If the load bearing
of the unit is not enough, or installation of the unit is improper, the unit may fall and result in
injury.
• Electrical work must be performed by a qualified electrical engineer in accordance with
the code governing such installation work, internal wiring regulations, and the manual. A
dedicated circuit and the rated voltage must be used. Insufficient power supply or improper
installation may cause electrical shock or fire.
• Use a cabtyre cable to connect wires in the indoor/outdoor units. Midway connection,
stranded wire, and single-wire connections are not allowed. Improper connection or fixing
may cause a fire.
• Wiring between the indoor unit and outdoor units must be well shaped so that the cover can
be firmly placed. Improper cover installation may cause increased heat, fire, or electrical
shock at the terminal area.
• Be sure to use only approved accessories or the specified parts. Failure to do so may
cause the unit to fall, water leakage, fire or electrical shock.
• After the installation work, ensure that there is no leakage of refrigerant gas. If the
refrigerant gas leaks out of the pipe into the room and is heated by fire or something else
from a fan heater, stove or gas range, it causes generation of poisonous gas.
• Make sure the equipment is properly earthed. Do not connect the earth wire to a gas pipe,
water pipe, lightning conductor, or telephone earth wire. Improper earth work may be the
cause of electrical shock.
• Do not install the unit where flammable gas may leak. If there is any gas leakage or
accumulation around the unit, it can cause a fire.
• Do not select a location for installation where there may be excessive water or humidity,
such as a bathroom. Deterioration of insulation may cause electrical shock or fire.
• Installation work must be performed following the instructions in this installation manual.
Improper installation may cause water leakage, electrical shock or fire. Check the following
items before operating the unit.
- Be sure that the pipe connection is well placed and there are no leaks.
- Check that the service valve is open. If the service valve is closed, it may cause
overpressure and result in compressor damage. At the same time, if there is a leak in the
connection part, it may cause air suction and overpressure, resulting in burst or injury.
• The following must be certainly done during pump down.
• Do not incorporate air into the refrigeration cycle.
• Close the 2 service valves. Stop the compressor and remove the refrigerant pipe.
If the refrigerant pipe is removed when the compressor is operating and service valves are
opened, the refrigerant cycle will inhale unwanted matter such as air and the pressure in the
cycle becomes abnormally elevated. It may cause a burst or injury.
• Do not modify the power cable, connect the cable midway, or use a multiple outlet
extension cable. Doing so may cause contact failure, insulation failure, or excess current,
resulting in fire or electrical shock.
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Installation Manual
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WARNING
• If you detect any damage, do not install the unit. Contact your supplying dealer immediately.
• Never modify this unit by removing any of the safety guards or bypassing any of the safety
interlock switches.
• Do not wash air conditioners with pressure washers.
Electric leaks may cause electric shocks or fires.
• Be sure to comply with local regulations/codes when running the wire from the outdoor unit
to the indoor unit. (Size of wire and wiring method etc.)
• When installing the air conditioner in a small room, provide appropriate measures to
ensure that the concentration of refrigerant leakage occur in the room does not exceed the
critical level. It is not dangerous refrigerant; it has not toxicity or combustibility. However,
a concentration above 0.3 kg/m
3
as criterion still causes suffocation. The volume of
refrigerant charged to the Multi System air conditioner is more than the volume charged to a
conventional individual system.
• Make sure drain hose insulation if cooling operation is used at sub-zero ambient
temperature.
CAUTION
• Please read this installation manual carefully before installing the unit. It contains further
important instructions for proper installation.
• Exposure of unit to water or other moisture before installation could result in electric
shock. Do not store it in a wet basement or expose to rain or water.
• After unpacking the unit, examine it carefully for possible damage.
• Do not install in a place that can increase the vibration of the unit. Do not install in a place
that can amplify the noise level of the unit or where noise and discharged air might disturb
neighbours.
• This appliance must be connected to the main power supply by means of a circuit breaker
depending on the place where the unit is installed. Failure to do so may cause electrical
shock.
• Follow the instructions in this installation manual to arrange the drain pipe for proper
drainage from the unit. Ensure that drained water is discharged. Improper drainage can
result in water leakage, causing water damage to furniture.
• Tighten the flare nut with a torque wrench using the prescribed method. Do not apply
excess torque. Otherwise, the nut may crack after a long period of usage and it may
cause the leakage of refrigerant.
• Wear gloves (heavy gloves such as cotton gloves) for installation work. Failure to do so
may cause personal injury when handling parts with sharp edges.
• Do not touch the air intake section or the aluminium fins of the outdoor unit. It may cause
injury.
• Do not install the outdoor unit in a place which can be a nest for small animals. Small
animals could enter and contact internal electrical parts, causing a failure or fire.
• Request the user to keep the place around the unit tidy and clean.
• Make sure to conduct a test run after the installation work, and explain how to use and
maintain the unit to the customer in accordance with the manual. Ask the customer to
keep the operation manual along with the installation manual.
• Do not climb onto or place objects on top of the outdoor unit. You may fall or the objects
may fall off of the outdoor unit and result in injury.
Requirement of report to the local power supplier
Please make absolutely sure that the installation of this appliance is reported to the local
power supplier before installation. If you experience any problems or if the installation is not
accepted by the supplier, the service agency will take adequate countermeasures.
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2
Installation / service tools
Changes in the product and components
In air conditioners using R410A, in order to prevent any other refrigerant from being accidentally charged, the service port diameter size of the outdoor unit
service valve has been changed. (1/2 UNF 20 threads per inch)
• In order to increase the pressure resisting strength of the refrigerant piping,
fl
are processing diameter and opposing
fl
are nuts sizes have been changed. (for
copper pipes with nominal dimensions 1/2 and 5/8)
Gauge manifold for R410A
Phillips screwdriver
Pipe cutter
Flare tool for R410A
Charge hose for R410A
Level
Torque wrench
4 mm hexagonal wrench
Vacuum pump for R410A
Scale
Wrench (or spanner)
Gas leakage detector for R410A
Utility knife
Reamer
3
Speci
fi
cations
RAS-3M18S3AV-E
RAS-2M18S3AV-E
RAS-2M14S3AV-E
Operating conditions
*1
Cooling operation
–10 to 46 °C
Dry operation
–10 to 46 °C
Heating operation
–20 to 24 °C
Dimension
Height
630 mm
Width
800 mm
Depth
300 mm
Net weight
46 kg
44 kg
Refrigerant R410A
1.5 kg
1.32 kg
Power supply
1 ph, 50 Hz, 220-240 V 1 ph, 60 Hz, 220 V
Maximum running current
13.1 A
12.6 A
Installation fuse rating
20 A breaker or fuse (all types can be used)
Power cord (H07RN-F or 60245IEC66)
3-core 1.5 mm
2
Connecting cable (H07RN-F or 60245IEC66)
4-core 1.0 mm
2
or more
Pipe length
Minimum for 1 unit
2 m
Maximum for 1 unit
25 m
20 m
Maximum for total unit
50 m
30 m
Height difference
10 m
No additional refrigerant charge
50 m
30 m
The specifications for performance of this air conditioner differs depending on the combination of the indoor units which are operated.
The information in this specifications table applies for the combinations with the catalogue.
For operation, read the owner’s manual packed with the indoor unit.
Equipment complying with IEC 61000-3-12.
*1 If the air conditioner is used in conditions other than the above, the safety protection functions may be activated.
* Example of indoor unit class: RAS-B10UFV-E1 is abbreviated as “10”.
Indoor unit class
Standard connecting pipe diameter
RAS-3M18S3AV-E
RAS-2M18S3AV-E
RAS-2M14S3AV-E
Unit C
07 or 10 or 13
6.35, 9.52 mm
—
—
Unit B
07 or 10 or 13 or 16
6.35, 9.52 mm
*3
6.35, 9.52 mm
*3
6.35, 9.52 mm
Unit A
07 or 10 or 13 or 16
6.35, 12.7 mm
*2
6.35, 9.52 mm
*3
6.35, 9.52 mm
Total
36 (RAS-3M18S3AV-E)
—
32 (RAS-2M18S3AV-E)
26 (RAS-2M14S3AV-E)
All combinations that do not exceed the “Total” number
can be installed.
2 or more indoor units must be connected to an outdoor
unit.
When 2 indoor units are connected to an outdoor unit,
note that some combinations of indoor units are not
compatible.
For the further details, refer to the catalogue.
*2 Need the reducer (07, 10, 13 class 12.7 to 9.52 mm).
*3 Need the expander (16 class 9.52 to 12.7 mm).
• Locally procured.
4
Installation parts, accessories
Installation parts *Locally procured
Parts name
Specifications
Q’ty
*4 Refrigerant piping covered with insulating material (Polyethylene
foam, 6 mm thick) When duct-type or cassette-type unit is to be
installed, it shall be covered with thicker insulating material
(Polyethylene foam, 10 mm thick)
Refrigerant piping
*4
Indoor unit
(abbreviation)
Liquid side
(O.D.)
Gas side (O.D.)
1 ea.
07, 10, 13
6.35 mm
9.52 mm
16
6.35 mm
12.7 mm
Putty, PVC tapes
—
1 ea.
Accessories
Installation
manual
1
Rubber cap
(Water-proof)
2
CD-ROM
(Installation
manual)
1
F-GAS label
1
Drain nipple
1
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5
Installation of outdoor unit
■
Installation Location
• A place which can bear the weight of the outdoor unit and does not cause
an increase in noise level and vibration.
• A place where the operation noise and air discharge do not disturb
neighbours.
• A place which is not exposed to strong wind.
• A place free of combustible gas.
• A place which does not block a passageway.
• A place where the drain water does not cause any problems.
• A place where there are no obstructions near its air intake or air discharge.
Installation in the following places may result in trouble:
• A place with a lot of machine oil.
• A place with saline-rich atmosphere such as a coastal area.
• A place with high level of sul
fi
de gas.
• A place where high-frequency waves are likely to be generated, such as
from audio equipment, welders, or medical equipment.
Do not install the unit in such places.
■
Precautions for Installation
• When the outdoor unit is to be installed in an elevated position, be sure to
secure its feet.
• If the outdoor unit is to be mounted on a wall, make sure the base plate
supporting it is sturdy enough.
• The base plate should be designed and manufactured to maintain its
strength over a long period of time, and suf
fi
cient consideration should be
given to ensure that the outdoor unit will not fall.
• When the outdoor unit is installed in a place that is always exposed to
strong wind such as a coastal area or on a high story of a building, secure
the normal fan operation using a duct or a wind shield.
• Especially in windy areas, install the unit in such a way as to prevent the
admission of wind.
• When the outdoor unit is to be mounted high on a wall, take particular care
to ensure that parts do not fall, and that the installer is protected.
• When doing installation work at ground level, it is usual to make wiring and
pipe connections to the indoor units
fi
rst, and then to make connections to
the outdoor units.
However, if outdoor work is dif
fi
cult, you can change the procedure.
For example, by making adjustments to the wiring and piping lengths on
the inside (rather than the outside).
• When using an air conditioner under low outside temperature conditions
(Outside temp: -5 °C or lower) In COOL mode, prepare a duct or wind
shield so that it is not affected by the wind.
Necessary Space for Installation
If you need to install the outdoor unit in a location where there are some
obstructions or a wall, secure sufficient space as shown in the figure below.
The cooling/heating effect may be reduced by 10%.
100 mm or more
100 mm or more
600 mm or more
600 mm or more
600 mm or more
Draining Off the Water from the Outdoor Unit
Install 2 waterproof rubber caps and the drain nipple to drain off the
water from the outdoor unit.
• Seal the knock-out holes and screw/thread areas tightly using a silicon
adhesive or a caulking compound.
• Use a drain pan to apply a centralized drain.
Drain nipple
Water-proofing rubber cap
Installation in Regions with Snowfall and Cold Temperatures
Do not use waterproof rubber caps or a drain nipple.
• If you need to install the outdoor unit in a location where there is a
possibility of the drain freezing, pay close attention so that the drain does
not become frozen.
• To protect the outdoor unit from snow, install the outdoor unit on a holding
frame, and attach a snow protection hood and plate.
• Keep the outdoor unit at least 500 mm above the snow accumulation line.
Snow protection plate
Snow protection hood
At least 500 mm
Snow accumulation line
Holding frame
Anchor bolts
Front
Fixing the Outdoor Unit
Fix the outdoor unit using attachment bolts.
• Use 8 mm or 10 mm anchor bolts and nuts.
• Do not allow the attachment bolts to protrude by more than 15 mm.
• Install the outdoor unit at ground level.
• Attach the vibration-proof rubber pads under the
fi
xing legs.
GOOD
BAD
Drain nipple mounting hole
Drain hole
15 mm or
less
Mounting leg
Absorb vibration
with vibration-proof
rubber pads
Foundation
Foundation
If only the end
of the
mounting leg
is supported,
it may
deform.
Do not support
the outdoor unit
only with the
mounting leg.
Foundation
Bottom plate of
outdoor unit
Support the bottom surface of the
mounting leg that is in contact with
and underneath the bottom plate of
the outdoor unit.
600
351
54
330
100
99
508
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6
Refrigerant piping
CAUTION
Install in rooms that are 5 m
3
or larger. If
a leak of refrigerant gas occurs inside the
room, an oxygen de
fi
ciency may occur.
■
Detaching the Valve cover
Remove the 5 screws.
• Pull the valve cover in the direction of the arrow, and remove it.
Valve cover
■
Refrigerant Piping Connection
Flaring
1. Cut the pipe with a pipe cutter.
Obliquity
Roughness
Warp
90°
2. Remove the burr inside of the pipe.
When removing the burr, be careful so that chips do not fall into the pipe.
3. Remove the
fl
are nuts attached to the outdoor/indoor unit, then insert them
into each of the pipes.
4. Flare the pipes.
See the following table for the projection margin (A) and
fl
aring size (B).
Die
Pipe
B
A
Pipe
A
B
Flare Nut
Outside
diameter
Thickness
Rigid
(clutch
type)
R410A
tool
Imperial
(wing
nut type)
R410A
tool
Width
across
flat
Tighten
torque
mm
mm
mm
mm
mm
mm
N•m
kgf•m
6.35
0.8
0 to 0.5
1.5 to
2.0
9.1
17
14 to
18
1.4 to
1.8
9.52
0.8
0 to 0.5
1.5 to
2.0
13.2
22
33 to
42
3.3 to
4.2
12.7
0.8
0 to 0.5
2.0 to
2.5
16.6
26
50 to
62
5.0 to
6.2
Pipe connection
1. Make wire and pipe connections for each indoor unit separately.
2. Align the centres of the connecting pipes and tighten the
fl
are nut as much
as possible with your
fi
ngers, then tighten the nut using a torque wrench.
Be sure to tighten the nut at the speci
fi
ed torque value.
• If you use one outdoor unit for several indoor units of a different class,
connect the largest one
fi
rst A, then connect the rest in the order B to C.
• Do not remove the
fl
are nuts for any ports you are not going to use for
connection.
• Do not leave the
fl
are nut unattached for a long period of time.
• Use a different-diameter joint if the diameters of the connection port and
connection piping are different.
• Mount the different-diameter joint on the connection port of the outdoor
unit.
■
Air Purge
From the sake of environmental protection, use a vacuum pump to extract
the air during installation.
* Prepare a 4 mm hexagon wrench.
1. Connect a charge hose.
• Make sure that the Handle Hi of the gauge manifold valve is closed fully.
• Connect the port of the gauge manifold valve and the service port (Valve
core (Setting Pin)) using the charge hose.
NOTE
If a control valve or charge valve is attached to the charge hose, leak
of R410A refrigerant can be avoided.
2. Open the Handle Low of the gauge manifold valve fully, then operate the
vacuum pump.
• Loosen the
fl
are nut of the at the gas end a little to make sure that air is
taken in, then tighten the nut.
• If you
fi
nd air is not taken in, make sure that the charge hose is
connected to the port(s) securely.
• Perform extraction for about 15 or more minutes and make sure that the
compound pressure gauge reading is –101 kPa (–76 cmHg).
• If the compound pressure gauge reading is not –101 kPa (–76 cmHg),
there is a possibility air is being taken in from the port(s).
• Make sure that the charge hose is connected to the port(s) securely.
3. Close the Handle Low of the gauge manifold valve fully, then stop
operating the vacuum pump.
• Leave the gauge and pump as they are for 1 or 2 minutes, then make
sure that the compound pressure gauge reading stays at –101 kPa
(–76 cmHg).
• You need not add refrigerant.
4. Disconnect the charge hose from the service port, then open the valve
stem fully using a 4 mm hexagon wrench.
Hexagon wrench is
required.
Service port cap
Valve stem cap
4 mm
5. Tighten the service valve stem cap and service port cap securely.
CAUTION
Use a torque wrench and tighten the nut at
the speci
fi
ed torque value.
6. Tighten all the caps on the valves securely, then perform a gas leak
inspection.
Service valve
Tighten torque
Valve stem cap
Service port cap
Type
mm
N•m
kgf•m
N•m
kgf•m
Liquid side
6.35
14 to 18
1.4 to 1.8
—
—
Gas side
9.52
14 to 18
1.4 to 1.8
14 to 18
1.4 to 1.8
12.7
33 to 42
3.3 to 4.2
14 to 18
1.4 to 1.8
Service valve at
the liquid side
Service valve at
the gas side
Service port
(Valve core
(Setting pin))
Vacuum pump
Handle Hi
(Keep full closed)
Pressure gauge
Manifold valve
Charge hose
(For R410A only)
Vacuum pump
adapter for counter-
flow preventation
(For R410A only)
Charge hose
(For R410A only)
Compound
pressure gauge
–101 kPa (–76 cmHg)
Handle Low
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Installation Manual
Outdoor Unit
CAUTION
This product contains fluorinated
greenhouse gases covered by the Kyoto
Protocol.
• Chemical Name of Gas: R410A
• Global Warming Potential (GWP) of gas:
2088
1. Stick the enclose refrigerant label adjacent
to the charging and/or recovering location.
2. Clearly write the charge refrigerant quantity
on the refrigerant label using indelible ink.
3. Prevent emission of the contained
fl
uorinated greenhouse gas.
Ensure that the
fl
uorinated greenhouse gas
is never vented into the atmosphere during
installation, service or disposal.
If any leakage of the contained
fl
uorinated
greenhouse gas is detected, the leak
must be stopped and repaired as soon as
possible.
4. Only quali
fi
ed service personnel are
allowed to access and service this product.
5. Any handling of the
fl
uorinated greenhouse
gas in the product, such as when moving
the product or recharging the gas, must
comply with (EC)
Regulation No.842/2006 on certain
fl
uorinated greenhouse gases and any
relevant local legislation.
6. Contact dealers, contractors, etc., for any
questions.
R410A
kg
kg
kg
1
2
Pre-charged Refrigerant
at Factory [kg], specified
in the nameplate
Additional Charge on
Installation Site [kg]
Periodical inspections for refrigerant leaks
may be required depending on European or
local legislation.
■
Insulation of the Refrigerant Pipes
• Insulate the refrigerant pipes for liquid and gas separately.
Heat-proof bubble polyethylene
■
Gas Leak Inspection
• Perform a gas leak inspection for the
fl
are nut connections, valve stem
connection, and service port cap without fail.
• Use a leak detector exclusively manufactured for R410A.
Flare nut connections
(Indoor unit)
Flare nut connections
(Outdoor unit)
Service port cap
connection
Valve stem cap
connection
* Check point example (RAS-3M18S3AV-E)
■
Performing Additional Installation of an Indoor Unit
1. Collect refrigerant from the outdoor unit.
2. Turn off the circuit breaker.
3. Perform additional installation referring to the procedure from “Refrigerant
Piping Connection” on the previous page.
7
Electrical work
WARNING
• Be sure to comply with local regulations/
codes when running the wire from the
outdoor unit to the indoor unit.
(Size of wire and wiring method etc.)
• A lack of electrical capacitance or incorrect
wiring may cause an electric shock or a
fi
re.
• To make sure that the wiring connection
are secure, use designated cables.
• Fix the cables securely so that no external
force applied to the cables may effect the
terminals.
• If wiring connections are incomplete or
cables are not
fi
xed securely, it may cause
a
fi
re.
• Be sure to ground the outdoor unit.
• Incomplete grounding may lead to an
electric shock.
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Installation Manual
Outdoor Unit
CAUTION
• Incorrect/incomplete wiring will cause
electrical
fi
res or smoke.
• Prepare the power source for exclusive
use with the air conditioner.
• This product can be connected to the main
power.
Fixed wire connections:
A switch that disconnects all poles and
has a contact separation of at least 3 mm
must be incorporated into the
fi
xed wiring.
■
Wire Connection
• The dash lines show on-site wiring.
(System
interconnection wires)
1
2
L
N
3
1
2
3
Input power
Leakage
breaker
Indoor unit
Remote
controller
Earth
(Main circuit)
• Connect the indoor/outdoor connecting cables to the identical terminal
numbers on the terminal block of each unit.
• Incorrect connection may cause a failure.
Power supply
1ph, 50Hz, 220-240V
1ph, 60Hz, 220V
Maximum running current
3M : 13.1 A, 2M : 12.6 A
Installation fuse rating
20 A
(All types can be used)
Power cord
H07RN-F or 60245 IEC 66
3-core 1.5 mm
2
Connecting cable
H07RN-F or 60245 IEC 66
4-core 1.0 mm
2
1. Remove the valve cover screws.
2. Pull the valve cover in the direction of arrow, and remove it.
3. Remove the cord clamp and the terminal cover.
Valve cover
Terminal cover
Cord clamp
4. Connect the wires for the power source and each indoor unit.
• Connect the connecting cable to the terminal as identi
fi
ed by the
matching numbers on the terminal block of the indoor and the outdoor
unit.
5. Fix the wiring connections for the power source and each indoor unit
securely using a cord clamp.
6. Attach the terminal cover and the valve cover.
Stripping Length of connecting cable for outdoor unit
55
5
5
30
1 2 3
5
5
30
55
L N
Earth wire
Earth wire
Power cord
Connecting cable
Connecting cable
Unit B
Power cord
Connecting cable
Unit C
Connecting cable
Unit A
Earth screw
Earth screw
Earth screw
Earth screw
8
Grounding
This air conditioner must be grounded without fail.
• Grounding is necessary not only to safeguard against the possibility
of receiving an electric shock but also to absorb both static, which is
generated by high frequencies and held in the surface of the outdoor unit,
and noise since the air conditioner incorporates a frequency conversion
device (called an inverter) in the outdoor unit.
• If the air conditioner is not grounded, users may receive an electric shock
if they touch the surface of the outdoor unit and that unit is charged with
static.
9
Test run
■
Wiring/Piping Check
CAUTION
Electric current is applied on the
control board. Beware of electric
shock.
1. Remove the valve cover screws.
2. Pull the valve cover in the direction of arrow, and remove it.
Valve cover
LED
Service switches
SW01
SW02
D800
D801
D802
D803
D804
D805
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Installation Manual
Outdoor Unit
3. Turn on the circuit breaker to supply electricity.
In the initial LED display status, D805 is lighted as below.
: ON,
: OFF, : Rapid Flashing (5 times/sec.),
: Slow Flashing (1 time/sec.)
D800
D801
D802
D803
D804
D805
Start running all the indoor units connected to the outdoor unit in the
cooling mode.
(The indoor unit in the room that doesn’t operate the cooling mode cannot
be checked.)
4. After 5 minutes, hold down SW01 for at least 5 seconds, and check that
D800 is lighted and D804 light is
fl
ashing ( 1 time/sec.).
D800
D801
D802
D803
D804
D805
5. Press the SW01 4 times until the LED is displayed as below.
D800
D801
D802
D803
D804
D805
6. Press SW02 for 1 times. Then D805 light is flashing (5 times/sec.).
D800
D801
D802
D803
D804
D805
7. Hold down SW02 for at least 5 seconds. Then the wiring/piping check
starts automatically. (The LED display is lighted for a moment.)
D800
D801
D802
D803
D804
D805
• If no problems are detected, the checking operation returns to the
normal operation automatically. The LED is displayed as below.
D800
D801
D802
D803
D804
D805
8. The below is displayed when the error is detected.
(* Repetition of 3 sec ON / 0.5 sec OFF)
D800
D801
D802
D803
D804
D805
*
*
*
*
*
Press the SW01 3 times until the LED is displayed as below, to check the
room judged as error.
D800
D801
D802
D803
D804
D805
Incorrect wiring/piping can be checked by pressing SW02. The LED is
displayed as below. Turn off the circuit breaker, then check wiring/piping
again.
Check result
D800 D801 D802 D803 D804 D805
Description
Normal operation (no error)
Trouble in unit A
Trouble in unit B
Trouble in unit C
Trouble in unit A and B
Trouble in unit A and C
Trouble in unit B and C
Trouble in unit A, B and C
• The D800 LED represents unit A.
• The D801 LED represents unit B.
• The D802 LED represents unit C.
9. When you want to start over the operation of the SW01 and SW02, press
the SW01 and the SW02 at the same time for 5 sec. (The procedure will
set back to step 3.) However, do not execute the operation during the
check. If by any chance the check is stopped by the operation, start over
the check after turning off the power once.
10. Notes
• It sometimes takes about 30 minutes maximum for the check.
• During the check, the compressor and the fan of the outdoor/indoor unit
repeat ON/OFF.
• You cannot check wiring/piping when the external temperature is 5°C
or less. Also, there is a possibility to misjudge if the indoor temperature
becomes too low by cooling operation. In that case, execute the cooling
operation for per room and check if the connection is normal.
■
Gas Leak Inspection
Refer to the “ Gas Leak Inspection” on page 9.
■
Test run
1. If you perform the test run in summer, start running in the cooling mode
fi
rst
to decrease the temperature of the room, then run in the heating mode.
(Heating mode: Set the temperature to 30°C.)
• If you perform the test run in winter, start running in the heating mode
fi
rst
to increase the temperature of the room, then run in the cooling mode.
(Cooling mode: Set the temperature to 17°C.)
2. For the test run, be sure to satisfy the following conditions below:
- Perform the test run for each indoor unit respectively.
- Perform the test run for about 10 minutes in both the cooling mode and
the heating mode.
• You can perform the test run in the cooling/heating mode by utilizing the
thermo sensor of the indoor unit.
Cooling mode: Warm the thermo sensor using an appliance such as a
hair dryer.
Heating mode: Put a cold towel on the thermo sensor.
■
Instructions for the Customers
• Explain to the customers the proper operation procedure and let them
operate the air conditioner along with the supplied instruction manual.
• When multiple indoor units are connected to the outdoor unit, the cooling
mode and the heating mode are not available at the same time.
When multiple indoor units are running at the same time, the operation mode
of the unit which starts running
fi
rst is applied to the other units.
• When you start running the indoor unit or change the operation mode, the
unit starts running after 3 minutes. This is due to the protection function of
the unit, not a malfunction.
• When the external temperature becomes low, the pre-heating of the
compressor starts to protect it. Keep the circuit breaker on for use.
The electricity consumption during pre-heating is about 30 W.
If the circuit breaker is turned off, the indoor unit may not start running for
about 10 minutes or more.
• Electronic expansion valves are used for the outdoor unit.
When you turn on the power, the outdoor unit starts clattering every 1 or
2 months. This clattering is not a malfunction, but occurs when the unit is
returning to the default setting for optimised control.
• While an indoor unit is running in the heating mode, the outdoor unit supplies
refrigerant to the other indoor units which are not running.
Therefore, noise may come from the other indoor units or the exterior of
them may become warm.
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Installation Manual
Outdoor Unit
10
Pump-down Operation
■
Pump-down Operation (Recovering refrigerant)
CAUTION
Since the forcible running for collecting
refrigerant stops automatically after 10
minutes,
fi
nish collecting refrigerant within
10 minutes.
Electric current is applied on the
control board. Beware of electric
shock.
• The following must be certainly done
during pump down.
• Do not incorporate air into the
refrigeration cycle.
• Close the service valves. Stop the
compressor and remove the refrigerant
pipe.
If the refrigerant pipe is removed when
the compressor is operating and service
valves are opened, the refrigerant cycle
will inhale unwanted matter such as air
and the pressure in the cycle becomes
abnormally elevated. It may cause a
burst or injury.
1. Remove the valve cover screws.
2. Pull the valve cover in the direction of arrow, and remove it.
Valve cover
LED
Service switches
SW01
SW02
D800
D801
D802
D803
D804
D805
3. Turn on the circuit breaker to supply electricity.
In the initial LED display status, D805 is lighted as below.
: ON,
: OFF, : Rapid Flashing (5 times/sec.),
: Slow Flashing (1 time/sec.)
D800
D801
D802
D803
D804
D805
Start running all the indoor units connected to the outdoor unit in the
cooling mode.
The checking procedure cannot be completed if the cooling mode is not
operated in every indoor units.
4. Hold down SW01 for at least 5 seconds, and check that D800 is lighted
and D804 light is
fl
ashing ( 1 time/sec.).
D800
D801
D802
D803
D804
D805
5. Press SW01 for 1 time. Then D804 light is
fl
ashing (5 times/sec.).
D800
D801
D802
D803
D804
D805
6. Press SW02 for 1 time. Then D805 light is
fl
ashing (5 times/sec.).
D800
D801
D802
D803
D804
D805
7. Hold down SW02 for at least 5 seconds. Then outdoor unit start cooling
mode.
(The display is kept during the refrigerants collection operation.)
D800
D801
D802
D803
D804
D805
8. Close the valve stem of the service valve at the liquid end.
9. Make sure that the compound pressure gauge reading is –101 kPa
(–76 cmHg)
10. Close the valve stem of the service valve at the gas end.
11. The refrigerants collection operation is
fi
nished in maximum 10 minutes.
After the collection is
fi
nished, promptly stop the operation of all the
indoor unit.
(There are cases that the compressor restarts.)
12. When you want to start over the operation of the SW01 and SW02, press
the SW01 and SW02 at the same time for 5 sec. (It back to the initial
condition of 3.)
However, do not execute the operation during the refrigerants collection.
If by any chance the collection is stopped by the operation, start over the
refrigerants collection operation.
11
Troubleshooting
You can perform fault diagnosis of the outdoor unit with the LEDs on the P.C.
board of the outdoor unit in addition to using the check codes displayed on
the remote controller of the indoor unit.
Use the LEDs and check codes for various checks. Details of the check
codes displayed on the remote controller of the indoor unit are described in
the Installation Manual of the indoor unit.
LED displays and check codes
: ON (
* : 3 sec ON/0.5 sec OFF),
: OFF
Display
Indoor
check
code
Description
D800
(YL)
D801
(YL)
D802
(YL)
D803
(YL)
D804
(YL)
D805
(GN)
-
Normal operation (no error)
*
1C
Compressor case thermostat error
*
21
High pressure switch error
*
*
1C
Compressor system error
*
1D
Compressor lock
*
*
1F
Compressor breakdown
*
*
14
Driving element short circuit
*
*
*
16
Position detection circuit error
*
17
Current detection circuit error
*
*
1C
Communication error between MCU
*
*
1A
Fan system error
*
*
*
1E
Discharge temperature error
*
*
19
Discharge temperature sensor
(TD) error
*
*
*
1B
Outdoor air temperature sensor
(TO) error
*
*
*
18
Suction temperature sensor (TS)
error
*
*
*
*
18
Heat exchanger temperature
sensor (TE) error
*
1C
Gas pipe (unit A) temperature
sensor (TGa) error
*
*
1C
Gas pipe (unit B) temperature
sensor (TGb) error
*
*
1C
Gas pipe (unit C) temperature
sensor (TGc) error
*
*
*
-
PMV error (SH
≥
20)
*
*
*
-
PMV error (SH
≤
–8)
*
*
20
PMV leakage error (unit A)
*
*
*
20
PMV leakage error (unit B)
*
*
*
20
PMV leakage error (unit C)
*
*
*
*
-
Miswiring (mispiping) check error
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