Toshiba RAS-3M18S3AV-E Installation Manual

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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

Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Installation / service tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 Speci

cations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Installation parts, accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Installation of outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Refrigerant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Electrical work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

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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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

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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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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Outdoor Unit

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

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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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,

are processing diameter and opposing

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

Speci

cations

RAS-3M18S3AV-E

RAS-2M18S3AV-E

RAS-2M14S3AV-E

Operating conditions

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

Connecting cable (H07RN-F or 60245IEC66)

4-core 1.0 mm

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

Unit A

07 or 10 or 13 or 16

6.35, 12.7 mm

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.

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

Indoor unit

(abbreviation)

Liquid side

(O.D.)

Gas side (O.D.)

1 ea.

07, 10, 13

6.35 mm

9.52 mm

6.35 mm

12.7 mm

Putty, PVC tapes

—

1 ea.

Accessories

Installation

manual

Rubber cap

(Water-proof)

CD-ROM

(Installation

manual)

F-GAS label

Drain nipple

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Installation Manual

Outdoor Unit

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

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

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

rst, and then to make connections to

the outdoor units.
However, if outdoor work is dif

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

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

xing legs.

GOOD

BAD

Drain nipple mounting hole

Drain hole

15 mm or

less

Mounting leg

Absorb vibration

with vibration-proof

rubber pads

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

330

100

508

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Installation Manual

Outdoor Unit

Refrigerant piping

CAUTION

Install in rooms that are 5 m

or larger. If

a leak of refrigerant gas occurs inside the
room, an oxygen de

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

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

aring size (B).

Die

Pipe

Flare Nut

Outside

diameter

Thickness

Rigid

(clutch

type)

R410A

tool

Imperial

(wing

nut type)

R410A

tool

Width

across

flat

Tighten

torque

N•m

kgf•m

6.35

0.8

0 to 0.5

1.5 to

2.0

9.1

14 to

1.4 to

1.8

9.52

0.8

0 to 0.5

1.5 to

2.0

13.2

33 to

3.3 to

4.2

12.7

0.8

0 to 0.5

2.0 to

2.5

16.6

50 to

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

are nut as much

as possible with your

ngers, then tighten the nut using a torque wrench.

Be sure to tighten the nut at the speci

ed torque value.

• If you use one outdoor unit for several indoor units of a different class,

connect the largest one

rst A, then connect the rest in the order B to C.

• Do not remove the

are nuts for any ports you are not going to use for

connection.

• Do not leave the

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

are nut of the at the gas end a little to make sure that air is

taken in, then tighten the nut.

• If you

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

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

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

uorinated greenhouse gas.

Ensure that the

uorinated greenhouse gas

is never vented into the atmosphere during
installation, service or disposal.

If any leakage of the contained

uorinated

greenhouse gas is detected, the leak
must be stopped and repaired as soon as
possible.

4. Only quali

ed service personnel are

allowed to access and service this product.

5. Any handling of the

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

uorinated greenhouse gases and any

relevant local legislation.

6. Contact dealers, contractors, etc., for any

questions.

R410A

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

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.

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

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

xed securely, it may cause

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

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

xed wiring.

■

Wire Connection

• The dash lines show on-site wiring.

(System
interconnection wires)

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

Connecting cable

H07RN-F or 60245 IEC 66

4-core 1.0 mm

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

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

1 2 3

L N

Earth wire

Power cord

Connecting cable

Unit B

Power cord

Connecting cable
Unit C

Connecting cable

Unit A

Earth screw

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.

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

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

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

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

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

Pump-down Operation

■

Pump-down Operation (Recovering refrigerant)

CAUTION

Since the forcible running for collecting
refrigerant stops automatically after 10
minutes,

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

ashing ( 1 time/sec.).

D800

D801

D802

D803

D804

D805









5. Press SW01 for 1 time. Then D804 light is

ashing (5 times/sec.).

D800

D801

D802

D803

D804

D805





6. Press SW02 for 1 time. Then D805 light is

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

nished in maximum 10 minutes.

After the collection is

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.

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)





Compressor case thermostat error







High pressure switch error





Compressor system error







Compressor lock









Compressor breakdown







Driving element short circuit





Position detection circuit error







Current detection circuit error









Communication error between MCU











Fan system error









Discharge temperature error







Discharge temperature sensor

(TD) error









Outdoor air temperature sensor

(TO) error







Suction temperature sensor (TS)

error





Heat exchanger temperature

sensor (TE) error





Gas pipe (unit A) temperature

sensor (TGa) error







Gas pipe (unit B) temperature

sensor (TGb) error









Gas pipe (unit C) temperature

sensor (TGc) error











PMV error (SH

≥

20)









PMV error (SH

≤

–8)





PMV leakage error (unit A)







PMV leakage error (unit B)









PMV leakage error (unit C)







Miswiring (mispiping) check error

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144 / 9 Moo 5, Bangkadi Industrial Park, Tivanon Road, Tambol Bangkadi, Amphur Muang, Pathumthani 12000, Thailand

1116691099

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