OVK R22, R407C, R410A Installation Instruction Sheet

Refrigerant

R410A, R407C, R22

Compact Wall Mounted Type ­Comfort Model (VRF System)

INSTALLATION INSTRUCTION SHEET

(PART NO. 9377773036)

This model is an appliance not accessible to the general public.

English

Contents

1. SAFETY PRECAUTIONS ....................................... 2

2. PRECAUTIONS FOR USING THE ALTERNATIVE

REFRIGERANT ....................................................... 4

3. ACCESSORIES ...................................................... 5

4. INSTALLATION WORK ........................................... 6

4-1. SELECTING AN INSTALLATION LOCATION ..........6

4-2. INSTALLATION DIMENSIONS .................................7

4-3. INSTALLING THE UNIT ...........................................8

4-4. PIPE INSTALLATION ............................................. 11

4-5. FIELD SETTING .................................................... 12

4-6. ELECTRICAL WIRING ...........................................16

4-7. FINISHING .............................................................19

4-8. INFRARED ADDRESS SETTING .......................... 20

5. TEST OPERATION ............................................... 23

6. CHECK LIST ......................................................... 23

7. ERROR CODES .................................................... 24

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1. SAFETY PRECAUTIONS

• Be sure to read this Sheet thoroughly before installation.

• The warnings and precautions indicated in this Sheet contain important information pertaining to your safety. Be sure to observe

them.

• After installing the unit, perform a test run to make sure the unit operates normally. Then, explain to the customer how to operate and

maintain the unit.

• Hand this Sheet, together with the Operating Manual to the customer.

Request the customer to keep them on hand for future use, such as for relocating or repairing the unit.

• This unit is used together as a set with the EV kit (optional).

Before installation, also read the Installation instruction Sheet of the EV kit thoroughly.

WARNING!

• Request your dealer or a professional installer to install the unit in accordance with this Sheet.
An improperly installed unit can cause serious accidents such as water leakage, electric shock, or fire.
If the unit is installed in disregard of the instructions in the Installation instruction Sheet, it will void the
manufacturer’s warranty.

• For installation purposes, be sure to use the parts supplied by the manufacturer or other prescribed parts.
The use of non-prescribed parts can cause serious accidents such as the unit to fall, water leakage, electric
shock, or fire.

• To install a unit that uses the R410A refrigerant, use dedicated tools and piping materials that have been
manufactured specifically for R410A use.
Because the pressure of the R410A refrigerant is approximately 1.6 times higher than the R22, failure to use
dedicated piping material or improper installation can cause rupture or injury.
Furthermore, it can cause serious accidents such as water leakage, electric shock, or fire.

• Do not introduce any substance other than the prescribed refrigerant into the refrigeration cycle.
If air enters the refrigeration cycle, the pressure in the refrigeration cycle will become abnormally high and
cause the piping to rupture.

This mark indicates procedures which, if improperly performed, might lead to the death or serious
injury of the user.

• Be sure to install the unit as prescribed, so that it can withstand earthquakes and typhoons or other strong
winds.
Improper installation can cause the unit to topple or fall, or other accidents.

• If there is a refrigerant leakage, make sure that it does not exceed the concentration limit.
If a refrigerant leakage exceeds the concentration limit, it can lead to accidents such as oxygen starvation.

• If a refrigerant leakage occurs during operation, immediately vacate the premises and thoroughly ventilate
the area.
If the refrigerant is exposed to fire, it will create a hazardous gas.

• Electrical work must be performed in accordance with this Sheet by a person certified under the national or
regional regulations. Be sure to use a dedicated circuit for the unit.
An insufficient power supply circuit or improperly performed electrical work can cause serious accidents
such as electric shock or fire.

• For wiring, use the prescribed type of wires, connect them securely, making sure that there are no external
forces of the wires applied to the terminal connections.
Improperly connected or secured wires can cause serious accidents such as overheating the terminals,
electric shock, or fire.

• Securely install the electrical box cover on the unit.
An improperly installed electrical box cover can cause serious accidents such as electric shock or fire through
exposure to dust or water.

• Do not turn ON the power until all work has been completed.
Turning ON the power before the work is completed can cause serious accidents such as electric shock or
fire.

• After the installation, make sure there is no refrigerant leakage.
If the refrigerant leaks into the room and becomes exposed to a source of fire such as a fan heater, stove, or
burner, it will create a hazardous gas.

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CAUTION!

• Do not install the unit in the following areas:

• Area with high salt content, such as at the seaside.

It will deteriorate metal parts, causing the parts to fall or the unit to leak water.

• Area filled with mineral oil or containing a large amount of splashed oil or steam, such as a kitchen.

It will deteriorate plastic parts, causing the parts to fall or the unit to leak water.

• Area that generates substances that adversely affect the equipment, such as sulfuric gas, chlorine gas,

acid, or alkali.

It will cause the copper pipes and brazed joints to corrode, which can cause refrigerant leakage.

• Area containing equipment that generates electromagnetic interference.

It will cause the control system to malfunction, preventing the unit from operating normally.

• Area that can cause combustible gas to leak, contains suspended carbon fibers or flammable dust, or

volatile inflammables such as paint thinner or gasoline.

If gas leaks and settles around the unit, it can cause a fire.

• Do not use the unit for special purposes, such as storing food, raising animals, growing plants, or preserving
precision devices or art objects.
It can degrade the quality of the preserved or stored objects.

• Ground the unit.
Do not connect the ground wire to a gas pipe, water pipe, lightning rod, or a telephone ground wire.
Improper grounding may cause electric shock.

• Install a ground leakage breaker.
If a ground leakage breaker is not installed, it may cause electric shock or fire.

• Perform drain work in accordance with this Sheet, and ensure that the drain water is properly drained.
If the drain processing is improperly installed, water may drip down from the unit, wetting the furniture.

This mark indicates procedures which, if improperly performed, might possibly result in personal harm
to the user, or damage to property.

• Do not touch the fins with bare hands.

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2. PRECAUTIONS FOR USING THE ALTERNATIVE REFRIGERANT

PRECAUTIONS FOR USING THE R410A REFRIGERANT

Pay careful attention to the following points :

• Since the working pressure is 1.6 times higher than that of R22 models, some of the piping and installation and service tools are

special. (See the table in the SPECIAL TOOLS FOR R410A section.)
Especially, when replacing a conventional refrigerant (other than R410A) model with a new refrigerant R410A model, always
replace the conventional piping and flare nuts with the R410A piping and flare nuts.

• Models that use refrigerant R410A have a different charging port thread diameter to prevent erroneous charging with R22, R407C

and for safety. Therefore, check beforehand. [The charging port thread diameter for R410A is 1/2 UNF 20 threads per inch.]

• Be more careful than the installation of the refrigerant (other than R410A) models, not to enter foreign matters (oil, water, etc.) and

other refrigerant into the piping. Also, when storing the piping, securely seal the openings by pinching, taping, etc.

• When charging the refrigerant, take into account the slight change in the composition of the gas and liquid phases, and always

charge from the liquid phase side whose composition is stable.

SPECIAL TOOL FOR R410A

Tool name

Gauge manifold

Charging hose

Vacuum pump

Gas leakage detector

Pressure is huge and cannot be measured with a conventional gauge. To prevent erroneous mixing of other
refrigerants, the diameter of each port has been changed.
It is recommended to use a gauge manifold with a high pressure display range –0.1 to 5.3 MPa and a low
pressure display range –0.1 to 3.8 MPa.

To increase pressure resistance, the hose material and base size were changed.

A conventional vacuum pump can be used by installing a vacuum pump adapter.

Special gas leakage detector for HFC refrigerant R410A.

Contents of change

PRECAUTIONS FOR USING THE R407C REFRIGERANT

The basic installation work procedures are the same as R22 models.
However, pay careful attention to the following points :

• Mixing R407C with R22, R410A can cause the refrigerant oil to deteriorate. Therefore, do not use tools that were used on an R22,

R410A unit.

• The R407C refrigerant does not contain chlorine. Therefore, a gas leakage detector designed for the R22 refrigerant will not react

to R407C.

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3. ACCESSORIES

Do not discard any accessories needed for installation until the installation work has been completed.

Name and Shape

Wall hook bracket

Q’ty

1

Application

For indoor unit
installation

Name and Shape

Wire assebly

Q’ty

Application

For wired remote control
installation

1

Binder

Cloth tape

Tapping screw

Adapter

For remote control cord
binding

1

For indoor unit
installation

1

For wall hook bracket
installation

8

Use as needed
ø12.7-ø9.52 (AS7/9)

1

Please refer to “4-4.2” on
Page 11.

Air cleaning filter

Air cleaning filter frame

Seal A

2

2

For indoor unit
installation

1

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4. INSTALLATION WORK

4-1. SELECTING AN INSTALLATION LOCATION

WARNING

Install at a place that can withstand the weight of the indoor unit and install positively so that the unit will not
topple or fall.

CAUTION

• Do not install where there is the danger of combustible gas leakage.

• Do not install near heat sources and the location with high temperature.

• Mount with the lowest moving parts at least 2.3 m above floor or grade level.

• Do not install the unit near a source of heat, steam, or flammable gas.

• If children may approach the unit, take preventive measures so that they cannot reach the unit.

• Avoid the places for installation, where there is oily smoke, machine oil (i.e. factory), salty environment with

direct sea breeze, and too much of dust.

• Install the unit where drainage does not cause any trouble.

• Welding parts may be fretted if the unit is installed where corrosive gas such as sulphurous acid gas is

generated.

• Control may not operate correctly if the unit is installed near machinery which generates electromagnetic ray.

• Install the unit in a well-ventilated place avoiding rains and direct sunlight.

• Install the unit where air from the outlet and noise do not disturb the neighbour.

• Install the indoor and outdoor units, power wiring, signal wiring and remote control wiring 1 m away from

television and radio to avoid distorted images and noise. (However, distorted noise may not be avoidable
even if units and wiring mentioned above are installed 1m away from television and radio depending on
conditions of electrical waves).

Decide the mounting position with the customer as follows:

(1) Install the indoor unit level on a strong wall, which is not subject to vibration.
(2) The inlet and outlet ports should not be obstructed. The air should be able to blow all over the room.
(3) Install the unit where the connection pipe can be easily installed.
(4) Install the unit where the drain pipe can be easily installed.
(5) Take servicing, etc. into consideration and leave the spaces shown in Fig. 4.1. Also install the unit where the filter can be removed.
(6) Install the indoor unit where vibrations and noise are not amplified.

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4-2. INSTALLATION DIMENSIONS

Provide a service space for inspection purposes.
Do not place any wiring or illumination in the service space, as they will impede service.

Fig. 4.1 Installation Dimensions

60 mm or over

1,500 mm or over

2,300 mm or over

50 mm
or over

Wall hook bracket

90 mm
or over

(Wall cap)

Drain hose
O.D 15.8 - 16.7 mm
I.D 13.8 mm

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4-3. INSTALLING THE UNIT

1. DETERMINING THE PIPING DIRECTION

The piping can be connected in the five directions indicated by 1, 2, 3, 4, and 5 in (Fig. 4.2).
When the piping is connected in direction 2 or 5, cut along the piping groove in the side of the front cover with a hacksaw.
When connecting the piping in direction 3, cut a notch in the thin wall at the front bottom of the front cover.

Fig. 4.2

(Rear)

5 Left outlet

2 Right outlet

3 Bottom outlet

1 Rear outlet

4 Left rear outlet

2. INSTALLING THE WALL HOOK BRACKET

CAUTION

Install the wall hook bracket horizontally and perpendicularly.

(1) Install the wall hook bracket so that it is correctly positioned horizontally and vertically. If the wall hook bracket is tiled, water will drip

to the floor.

(2) Install the wall hook bracket so that it is strong enough to withstand the weight of an adult.

• Fasten the wall hook bracket to the wall with 6 or more screws through the holes near the outer edge of the bracket.

• Check that there is no rattle at the wall hook bracket.

Fig. 4.3

Wall hook bracket

Tapping screw

Wall hook bracket

Center notch

Hook

String

3. CUTTING THE HOLE IN THE WALL FOR THE CONNECTING PIPING

WARNING

If the wall pipe is not used, the cord interconnecting the indoor and outdoor units may touch metal and cause
electric leakage.

(1) Cut a 65 mm diameter hole in the wall at the position shown in Fig.4.4.
(2) When cutting the wall hole at the inside of the wall hook bracket, cut the hole within the range of the left and right center marks

40 mm below the wall hook bracket.
When cutting the wall hole at the outside of the wall hook bracket, cut the hole at least 10 mm below over.

(3) Cut the hole so that the outside end is lower (5 to 10 mm) than the inside end.
(4) Always align the center of the wall hole. If misaligned, water leakage will occur.
(5) Cut the wall pipe to match the wall thickness, stick it into the wall cap, fasten the cap with vinyl tape, and stick the pipe through the

hole. (The connection pipe is supplied in the installation set.) (Fig. 4.4)

(6) For left piping and right piping, cut the hole a little lower so that drain water will flow freely. (Fig. 4.4)

Fig. 4.4

Wall hook bracket

Lower

65 mm dia. hole

5 to 10
mm low

Center mark

65 mm dia. hole

10 mm
or over

Lower

Fasten with
vinyl tape

(Wall cap)

(Wall pipe)

(Inside) Wall (Outside)

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4. FORMING THE DRAIN HOSE AND PIPE

CAUTION

• In order to align the drain hose and drain cap, be sure to insert securely and vertically. Incline insertion will
cause water leakage.

• When inserting, be sure not to attach any material besides water. If any other material is attached, it will
cause deterioration and water leakage.

• After removing drain hose, be sure not to forget mounting drain cap.

• Be sure to fix the drain hose with tape to the bottom of piping.

[Rear piping, Right piping, Bottom piping]

(1) Install the indoor unit piping in the direction of the wall hole and bind the drain hose and pipe together with vinyl tape. (Fig. 4.5)
(2) Install the piping so that the drain hose is at the bottom.
(3) Wrap the pipes of the indoor unit that are visible from the outside with decorative tape.

[For Left rear piping, Left piping]

(1) Interchange the drain cap, insulation and the drain hose. (Fig. 4.6)
(2) Align the marks on the wall hook bracket and shape the connection pipe. (Fig. 4.7)
(3) Bend the connection piping at the bend radius of 70 mm or more and install no more than 35 mm from the wall.

Fig. 4.5 Fig. 4.6

For left outlet piping, cut off the
piping outlet cutting groove with a
hacksaw.

Remove the drain cap by pulling

Right piping

Bottom piping

Bind with vinyl tape

Pipe (top) Rear piping

Indoor unit drain hose (bottom)

Insulation

Indoor unit
drain hose

Drain cap

at the projection at the end of the
cap with pliers, etc.
And remove the insulation.

Fig. 4.7

Installation method of Drain cap

Please put the heat insulation inside

Connection pipe
(Liquid pipe)

●

all along.

●

Use a hexagonal wrench (4mm at
opposite side) to insert the drain

Bend (R70) with
a pipe bender

Align the marks.

Connection pipe (Gas pipe)

cap, till the drain cap contacts the
tip of drain cock.

Hexagonal
wrench

[Removal method of drain hose]

Remove the screw at the left of drain hose and pull out drain hose. (Fig. 4.8)

[Installation method of drain hose]

Vertically insert the drain hose toward the inside, so that the drain fixture (blue) can accurately align with the screw hole around the drain
cock.
After inserting and before replacing, please reinstall and fix the removed screws. (Fig. 4.9)

Fig. 4.8

Fig. 4.9

No gap

No gap

Drain Cock

Insulation

Drain cap

Screw

Drain fixture (blue)

Drain hose

Screw hole

• Be sure to install around the drain hose connector.

• As the screw is inside, be sure to use screwdriver treated with magnet.

Drain fixture(blue)

Drain cock

Screw

Drain hose

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5. Installing the indoor unit

(1) After passing the indoor piping and drain hose through the wall hole, hang the indoor unit on the hooks at the top and bottom of the

wall hook bracket. (Fig. 4.10)

(2) Remove the intake grille.

1 Open the intake grille. (Fig. 4.11)
2 Pull down the knob. (Fig. 4.12)
3 Lift the intake grille upward, until the axle at the top of the intake grille is removed.

(3) Remove the front panel.

1 The thumb is hung on the lower part as shown in the figure, and it pulls to the front, pushing [–] mark, and bottom hooks (two

position) is removed from wall hook bracket. (Fig. 4.13)

2 The front panel bottom is pulled to the front, and bottom hooks is removed indoor unit. (Fig. 4.13)
3 The front panel is pulled to the front, raising the upper surface, and a front panel is removed. (Fig. 4.14)

(4) Insert the spacer, etc. between the indoor unit and the wall hook bracket and separate the bottom of the indoor unit from the wall.

(Fig. 4.15)

Fig. 4.10 Fig. 4.11

Connection pipe
(2 mm dia.)

Indoor unit

Fig. 4.12

(Fitting)

Top hooks

Bottom hooks

Intake grille

Knob

Wall hook
bracket

Intake grille

2

1

Fig. 4.13

Push

[–]
mark

Fig. 4.14 Fig. 4.15

Front panel

Indoor unit

Screws
(4 position)

Push

Wall hook bracket

2

1

Front panel

Spacer

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Wall hook bracket

4-4. PIPE INSTALLATION

Refer to the Installation Instruction Sheet of the outdoor unit for pipe dimension of indoor unit.

1. FLARE PROCESSING

(1) Cut the connection pipe with pipe cutters so that the pipe is not deformed.
(2) Holding the pipe downwards so that cutting cannot enter the pipe and remove the burrs.
(3) Remove the flare nut from the indoor unit pipe and assemble as shown in Table 4.1 and insert the flare nut onto the pipe, and flare

with a flaring tool.

Outer diameter of

pipe d mm

ø 6.35 17 0 to 0.5 1.0 to 1.5 9.1 16.0 to 18.0

ø 9.52 22 0 to 0.5 1.0 to 1.5 13.2 30.0 to 42.0

ø 12.70 26 0 to 0.5 1.0 to 1.5 16.6 49.0 to 61.0

ø 15.88 29 0 to 0.5 1.0 to 1.5 19.7 63.0 to 75.0

ø 19.05 36 0 to 0.5 1.0 to 1.5 24.0 90.0 to 110

Flare nut width

L1 mm

Clutch type flare

tool for R410A

(Clutch type)

Table 4.1

Dimensions A mm

Clutch type flare

tool for R22, R407C

(Clutch type)

Dimension D mm

tolerance

0.0 mm

(

-0.4 mm

)

Tightening torque

N · m

Fig. 4.16

Flare nut width

L1

Die

d

A

Pipe

D

Be sure the flared
part is not crazed or
cracked.

d

2. CONNECTION PIPES

CAUTION

• Be sure to connect the EV kit (optional) that is suitable to the indoor unit.
For installation instructions, refer to the installation instruction sheet of the EV kit.

• Be sure to apply the pipe against the port on the indoor unit correctly. If the centering is improper, the flare
nut cannot be tighten smoothly. If the flare nut is forced to turn, the threads will be damaged.

• Do not remove the flare nut from the indoor unit pipe until immediately before connecting the connection
pipe.

• Hold the torque wrench at the grip, keeping it in the right angle with the pipes as shown in Fig. 4.17, in order
to tighten the flare nut correctly.

When the flare nut is tightened properly by your hand, hold the body side coupling with a separate spanner, then tighten with a torque
wrench (Fig. 4.17, Table 4.1).

Fig. 4.17

Torque wrench

Tighten with two wrenches.

Wrench (fixed)

Flare nut

AS

AS E12/14L UTR-EV14

Table 4.2 Selecting the EV kit

MODEL APPLICABLE EV kit

E07/09L UTR-EV09

Indoor unit
pipe
(body side)

In order to use the R407C or R22 refrigerant, the pipe diameter will not match on the AS E07/09L. Therefore, it is necessary to install
an adapter (standard part).

Connection pipe

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4-5. FIELD SETTING

1. SETTING THE ADDRESS

Manual address setting method

CAUTION

• When setting the DIP switch, use an insulated screw driver.

• When handling the PCB, static electricity charged in the body may cause malfunction of the PCB. Follow the

cautions below:

• Touch metal part of the indoor and outdoor units for more than 10 seconds to discharge static electricity

charged in the body.

• Do not touch terminals of parts and patterns implemented on the PCB.

(1) Remove the cord clamp. (Fig. 4.18)
(2) Remove screws of the heat exchanger, and then remove grounding wire. (Fig. 4.19)
(3) Remove three thermistors. (Fig. 4.19)
(4) Remove the connector. (Fig. 4.19)
(5) Remove screw, then remove the control unit. (Fig. 4.20)

Fig. 4.18 Fig. 4.19 Fig. 4.20

Control unit

Screw

Thermistor

Cord clamp

Screw

Screw

Grounding

Connector

Screw

wire

(6) Set the switches on the PCB.

1 Indoor unit addresses

Dip SW (SW4-1 and SW4-2) ................................ Factory setting “OFF”

Rotary SW (SW6) ................................................. Factory setting “0”

When connecting multiple indoor units to one refrigerant system, set SW4-1, SW4-2, and SW6 as shown in Table 4.3.

2 Refrigerant circuit addresses

Dip SW (SW5-1, SW5-2, and SW5-3) .................. Factory setting “OFF”

Rotary SW (SW7) ................................................. Factory setting “0”

In the case of multiple refrigerant systems, set SW5-1, SW5-2, SW5-3, and SW7 as shown in Table 4.3 for each refrigerant

system.

Set the indoor unit to the same refrigerant circuit address as the outdoor unit.

Fig. 4.21

SW5

SW4

SW3

SW2

SW1

SW8

SW7

SW6

Rotary Switch (SW6–SW8)
Example: “0” (Factory setting)

0

1

F

2

E

3

D

4

C

5

B

A

6

9

7

8

Dip Switch (SW1–SW5)
Example: SW2

SW

SW

SW

SW

2-4

2-3

2-1

2-2

OFF

ON

• If working in an environment where the wireless remote controller can be used, the addresses can also be set using the remote
controller.

• If setting the addresses using the wireless remote controller, set the indoor unit address and refrigerant circuit address to “00”. (For
information on setting using the wireless remote controller, refer to “4-8. INFRARED ADDRESS SETTING”.)

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Table 4.3

Switch Setting Switch Setting

INDOOR UNIT INDOOR UNIT

Indoor unit

address

Refrigerant

circuit

address

10 OFF OFF OFF A 60 ON ON OFF C

11 OFF OFF OFF B 61 ON ON OFF D

12 OFF OFF OFF C 62 ON ON OFF E

13 OFF OFF OFF D 63 ON ON OFF F

14 OFF OFF OFF E 64 OFF OFF ON 0

15 OFF OFF OFF F 65 OFF OFF ON 1

16 ON OFF OFF 0 66 OFF OFF ON 2

17 ON OFF OFF 1 67 OFF OFF ON 3

18 ON OFF OFF 2 68 OFF OFF ON 4

19 ON OFF OFF 3 69 OFF OFF ON 5

20 ON OFF OFF 4 70 OFF OFF ON 6

21 ON OFF OFF 5 71 OFF OFF ON 7

22 ON OFF OFF 6 72 OFF OFF ON 8

23 ON OFF OFF 7 73 OFF OFF ON 9

24 ON OFF OFF 8 74 OFF OFF ON A

25 ON OFF OFF 9 75 OFF OFF ON B

26 ON OFF OFF A 76 OFF OFF ON C

27 ON OFF OFF B 77 OFF OFF ON D

28 ON OFF OFF C 78 OFF OFF ON E

29 ON OFF OFF D 79 OFF OFF ON F

30 ON OFF OFF E 80 ON OFF ON 0

31 ON OFF OFF F 81 ON OFF ON 1

32 OFF ON OFF 0 82 ON OFF ON 2

33 OFF ON OFF 1 83 ON OFF ON 3

34 OFF ON OFF 2 84 ON OFF ON 4

35 OFF ON OFF 3 85 ON OFF ON 5

36 OFF ON OFF 4 86 ON OFF ON 6

37 OFF ON OFF 5 87 ON OFF ON 7

38 OFF ON OFF 6 88 ON OFF ON 8

39 OFF ON OFF 7 89 ON OFF ON 9

40 OFF ON OFF 8 90 ON OFF ON A

41 OFF ON OFF 9 91 ON OFF ON B

42 OFF ON OFF A 92 ON OFF ON C

43 OFF ON OFF B 93 ON OFF ON D

44 OFF ON OFF C 94 ON OFF ON E

45 OFF ON OFF D 95 ON OFF ON F

46 OFF ON OFF E 96 OFF ON ON 0

47 OFF ON OFF F 97 OFF ON ON 1

48 ON ON OFF 0 98 OFF ON ON 2

49 ON ON OFF 1 99 OFF ON ON 3

Dip Switch Dip Switch Dip Switch

SW4-1 SW4-2 SW6 SW4-1 SW4-2 SW6

SW5-1 SW5-2 SW5-3 SW7 SW5-1 SW5-2 SW5-3 SW7

0 OFF OFF OFF 0 50 ON ON OFF 2

1 OFF OFF OFF 1 51 ON ON OFF 3

2 OFF OFF OFF 2 52 ON ON OFF 4

3 OFF OFF OFF 3 53 ON ON OFF 5

4 OFF OFF OFF 4 54 ON ON OFF 6

5 OFF OFF OFF 5 55 ON ON OFF 7

6 OFF OFF OFF 6 56 ON ON OFF 8

7 OFF OFF OFF 7 57 ON ON OFF 9

8 OFF OFF OFF 8 58 ON ON OFF A

9 OFF OFF OFF 9 59 ON ON OFF B

• The indoor unit address can only be set to 0-63.

Rotary Switch

Indoor unit

Dip Switch Dip Switch Dip Switch

adress

Refrigerant

circuit

address

Rotary Switch

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2. CUSTOM CODE SETTING

Fig. 4.23

Selecting the custom code prevents the indoor unit mix-up.
(Fig. 4.23)
(Up to 4 codes can be set.)

CUSTOM CODE SETTING FOR INDOOR UNIT

Set the DIP SW 3-1, 3-2, referring to the Table 4.4.

Fig. 4.22

DIP SWITCH (SW1~5)

SW5

SW4

SW3

SW2

SW1

SW8

SW7

SW6

CUSTOM CODE SETTING FOR WIRELESS REMOTE CONTROLLER

1

START/STOP

23

Example : SW3

SW

SW

3-4

3-3

MASTER

CONTROL

SW
3-2

SW

3-1

OFF

ON

Indoor
unit

Remote
controller

DIP SW 3-1

DIP SW 3-2

Confusion

Table 4.4

Custom code

A (Factory setting)

OFF

OFF

4

Code change

A B C D

A B C D

B

ON

OFF

MASTER

CONTROL

C

OFF

ON

D

ON

ON

Press until only the clock is
displayed.

Press for more than 5 seconds
to display the current custom
code. (Initially set to

)

Change the custom code
between
code on the display to the air
conditioner custom code.

to match the

Press again to return to the
clock display. (The custom
code will be changed.)

3. SETTINGS ACCORDING TO THE REFRIGERANT USED

Fig. 4.24

SW5

SW4

SW3

SW2

SW1

SW8

SW7

SW6

SW
3-4

SW
3-3

SW3

SW
3-2

SW

3-1

OFF

ON

Refrigerant

Used

DIP SW 3-4

DIP SW 3-3

Table 4.5

R410A

OFF

(Factory

setting)

OFF

(Factory

setting)

R407C

ON

ON

R22

OFF

(Factory

setting)

ON

CAUTION

Do not operate any switches other than prescribed, as it can cause the unit to operate improperly or malfunc­tion.

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4. CONNECTING THE WIRED REMOTE CONTROLLER (IF NECESSARY)

In order to connect the wired/simple remote control to the external switch controller, the wire assembly (standard parts) which is
attached to the indoor unit needs be connected to the end of remote controller cord.

(1) Use a tool to cut off the terminal on the end of the remote controller cord, and then remove the insulation from the cut end of the

cord as shown in Fig. 4.25.
(2) Connect the remote controller cord and wire assembly as shown in Fig. 4.26.
(3) Connect the wire of wired remote control unit to the PCB of Control unit.
(4) Fasten the remote control cord to the EV kit cord with the binder as shown in Fig. 4.27.

Fig. 4.25 Fig. 4.26 Fig. 4.27

PCB

White

Red

White

Red

Black

Black

Insutated
connection

Connector

To EV kit

Binder

10 mm or less

20 mm

Remote
controller cord

Remote
controller
cord

5. INSTALLING THE CONTROL UNIT

• Refer to Fig. 4.19 and 4.20 to install the control unit, thermistor, and grounding wire.

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4-6. ELECTRICAL WIRING

WARNING

• Perform wiring work in accordance with standards so that the air conditioner can be operated safely and
positively.

• Connect the connection cable firmly to the terminal board. Imperfect installation may cause a fire.

• The terminal board numbers should be the same among the indoor units. Also, match the terminal board
numbers of the indoor unit with those of the outdoor unit. If connected improperly, all the PCB may be
damaged.

Make sure that the total electric current* of the indoor units connected to a single power supply is 15 A or less. Exceeding
15 A may cause a fire.
* Determine the total electric current by adding the rated current shown on the rating label of each indoor unit.

CAUTION

• Do not connect power supply wires to the transmission or remote control terminals, as this will damage the
product.

• Never bundle the power supply cord and transmission cord together. Bundling these cords together will
cause miss operation.

• When handling the PCB, static electricity charged in the body may cause malfunction of the PCB. Follow the
cautions below:

• Establish a ground for the indoor and outdoor units and peripheral devices.

• Cut power (breaker) off.

• Touch metal part of the indoor and outdoor units for more than 10 seconds to discharge static electricity

charged in the body.

• Do not touch terminals of parts and patterns implemented on the PCB.

1. ELECTRICAL REQUIREMENT

Table 4.6

Voltage rating 230 V

Operating range 198 - 264 V

Table 4.7

Recommended

cable size

2

(mm

)

Power supply cord

Transmission cord

Remote controller

cord

*: Use shielded cable in accordance with local rules for remote controller cable.

2.5

0.33

0.33

Type245 IEC57 or equivalent

LONWORKS compatible cord

Sheathed PVC cable*

Table 4.8

Fuse capacity (A) Breaker for leakage current

20 30 mA 0.1 sec. or less

Wire type Remark

1ø 50 Hz 198–264 V
2 Wire + ground

22 AWG LEVEL 4 (NEMA)
non-polar 2 core, twisted pair
solid core diameter 0.65 mm

Polar 3 core
Twisted pair

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2. WIRING METHOD

(EXAMPLE)

Fig. 4.28

3. UNIT WIRING

• Before attaching the wire to terminal block.

Fig. 4.29

40 mm

75 mm

Transmission cord

• When the two wires are attached.

Fig. 4.31

Loop

Wire

Terminal block

OK

Screw with
special washer

Round terminal

Terminal board

OK

Different
diameter

NO GOOD

Earth wire

Power supply cord

Fig. 4.30

Round
terminal

Strip 10 mm

Strand wire

200 mm

Shielded
wire (no film)

220 mm

Strip 25 mm

Insulation

Solid wire

CAUTION

• To peel the film from the lead wire, use a dedicated tool that will not damage the conductor wire.

Connect to
one side

NO GOOD

• When installing a screw on the terminal board, do not cut the wire by overtightening the screw. On the other
hand, an undertightened screw can cause faulty contact, which will lead to a communication failure.

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(1) Connect the connection cable.
(2) Install the cord clamp.

Fig. 4.32

OK NO GOOD

Screw hole Screw holeCode Code

Do not route the cords over the screw hole.

Fig. 4.33

EV kit cord

Power supply cord

Transmission cord

Connect

Cord clamp

EV kit cord

After connecting the EV kit cord, slide the
tube (included with the EV kit) over the
connector to protect it.

Connect Tube

Binder (Small)

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Screw

4-7. FINISHING

• After completing the refrigerant leak check (for details, refer to the Installation instruction Sheet of the outdoor unit), install the
insulation.

(1) Insulate between pipes.

• For rear, right, and bottom piping, overlap the connection pipe heat insulation and indoor unit pipe heat insulation and bind them

with vinyl tape so that there is no gap. (Fig. 4.34)

• For left and left rear piping, butt the connection pipe heat insulation and indoor unit pipe heat insulation together and bind them

with and vinyl tape so that there is no gap. (Fig. 4.34)

• For left and left rear piping, wrap the area which accommodates the rear piping housing section with cloth tape. (Fig. 4.35)

• For left and left rear piping, bind the connection cord to the top of the pipe with vinyl tape.

• For left and left rear piping, bundle the piping and drain hose together by wrapping them with cloth tape over the range within

which they fit into the rear piping housing section.

(2) Temporarily fasten the connection cord along the connection pipe with vinyl tape. (Wrap to about 1/3 the width of the tape from the

bottom of the pipe so that water does not enter.) (Fig. 4.36)

(3) Securely fasten the EV kit cord to the indoor unit pipe.
(4) Conceal the tube protecting the EV kit connector with the product, etc., so that the customer cannot access it.
(5) Fasten the connection pipe to the outside wall with saddles, etc. (Fig. 4.37)
(6) Fill the gap between the outside wall pipe hole and the pipe with sealer so that rain water and wind cannot blow in.
(7) Install the front panel.

1. Firstly, fit the lower part of the front panel, and insert top and bottom hooks. (Three top sides, six bottom sides) (Fig. 4.38)

2. Four screws is attached.

(8) Install the intake grille.

1. The fixing axle of the intake grille is installed on the Panel.

2. Lay down the intake grille.

(9) Fasten the drain hose to the outside wall, etc. (Fig. 4.39)

Check the condition of the drain hose and make sure that it is routed correctly.

Fig. 4.34

Overlap the insulation

Connection pipe
(Heat insulation)

Bind the pipes together
so that there is no gap.

Indoor unit pipe (Heat insulation)

Vinyl tape

Fig. 4.35

Pipe

Drain hose

Wrap with cloth tape

Cloth tape

Fig. 4.36 Fig. 4.37

Power supply cord
Transmission cord
EV kit cord

Wall pipe

Connection cord –

Connection
pipe

Drain hose

Fig. 4.38

Bottom hooks

Indoor unit

Bottom hole
(Six position)

(Six position)

Front panel

Top holes (Two sides)

Indoor unit

Fig. 4.39

OK

Drain
hose

Saddle

No Good

No Good

Lifted up Wave

No Good

Make sure the drain water is properly drained.

End in water

(Saddle)

Pipe

Top hole (Center)

(Outside wall cap)

Wall

(Outdoors)

Top hooks
(Two sides)

CAUTION

(Sealer putty)

Top hook (Center)

Front panel

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4-8. INFRARED ADDRESS SETTING

• This setting cannot be performed in an environment in which the wireless remote controller cannot be used (the wireless remote

controller is an optional parts).

• This setting is unnecessary if the indoor unit address and refrigerant circuit address have been set up in section 4-5.

• Turn the power of the indoor unit ON before starting the setting.

* By turning on the power indoor units initializes EEV, so make sure the piping air tight test and vacuuming have been conducted

before turning on the power.

* Also check again to make sure no wiring mistakes were made before turning on the power.

1. BUTTON NAME AND FUNCTION

Fig. 4.40

OPERATION
indicator (Red)

TIMER indicator
(Green)

SWING indicator
(Orange)

MANUAL

AUTO

MANUAL AUTO

2. CONFIRMING THE CUSTOM CODE

Check the custom code of the indoor unit and change the custom code of the wireless remote controller accordingly. (To change the
custom code, refer to “4-5.2 CUSTOM CODE SETTING”.)

(1) Press and hold the “FAN CONTROL ” and the “+” buttons.

Whilst holding these 2 buttons, press the “ACL” button.

FAN CONTROL
SET TEMP (+)
ACL

(2) Press the “+” or “-” buttons to select the custom code that

matches the setting with the indoor unit. By selecting the ap­propriate custom code, the communication between the in­door unit and the wireless RC become possible.

CUSTOM CODE

The initial setting is “ ”

Address setting
mode display

(3) Press the “VERTICAL AIRFLOW ” button to send the code to

the indoor unit.

Pi Pi

Indoor unit

Wrong code:
No Response

3. SETTING THE ADDRESS

Press and hold the “MANUAL/AUTO” button for 3 seconds.

OPERATION
indicator (Red)

Pi Pi Pi

MANUAL

AUTO

MANUAL
AUTO

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1 INDOOR UNIT ADDRESS SETTING

(1) Press the “MASTER CONTROL ” button to access

the address setting mode.

(3) Press the “FAN CONTROL ” button to access the address

data setting mode. The address data will flash once this but­ton is pressed.

Address data

(5) Press the “START/STOP ” button once to send the infor-

mation. A beeping noise will be heard if the command is ac­cepted.

(2) Make sure the bottom number address code is ‘01’. If the num-

ber is other than ‘01’, press the “+” or the “-” buttons to alter.

SET “01”

(4) Press the “+” or the “-” buttons to adjust the address data. The

indoor unit address range is between 00 and 63.
Each time the “MASTER CONTROL

” button is

pressed, it switches between 1 unit and 10 units positions.

Range
00 - 63

+:UP

- : DOWN

Change digit

(6) Indoor unit will display the indoor unit address data number on

“TIMER

” (Green) and “SWING ” (Orange) light.

OPERATION
(Red)

TIMER
(Green)

SWING
(Orange)

Pi Pi
Pi ——PiPiPi——

Indoor unit

* In the following cases the setting signal is not read and a buzzer

sounds.

The indoor unit address No. is set out of range (64 or more) :
Pi Pi Pi ———— (3 sec)
The setting of the rotary switch on the PCB is not “00” : Pi Pi
Pi Pi Pi

CHECK ADDRESS SETTING

Press the “SLEEP” button.

Indoor unit

PiPi

CORRECT : Pi——PiPiPiPiPi ——

PiPi

WRONG : Pi————— (3 sec)

Continuously Flashing times of

address numbers

(Example) ADDRESS : 34

OPERATION
indicator (Red)

TIMER indicator
(Green)

SWING indicator
(Orange)

(1 digit)

0.5 sec ON / 0.5 sec OFF

4 times 1 - 10 sec

0.5 sec ON / 0.5 sec OFF

3 times 1 - 10 sec

Flashing times of

address numbers

(10 digit)

* ADDRESS 0 setting will not indicate TIMER indicator.

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2 REFRIGERANT CIRCUIT ADDRESS SETTING

(1) Press the “FAN CONTROL ” button to select the address

code.

Address code

(3) Press the “FAN CONTROL ” button to access the address

data setting mode. The address data will flash once this but­ton is pressed.

Address data

(5) Press the “START/STOP ” button once to send the infor-

mation. A beeping noise will be heard if the command is ac­cepted.

(2) Press the “+” or “-” button to adjust

address code 02.

SET “02”

(4) Press the “+” or the “-” buttons to adjust the address data. The

refrigerant circuit address range is between 00 and 99.
Each time the “MASTER CONTROL

” button is

pressed, it switches between 1 unit and 10 units positions.

Range
00 - 99

+:UP

- : DOWN

Change digit

(6) Indoor unit will display the refrigerant circuit address data

number on “TIMER

OPERATION
(Red)

” (Green) and “SWING ” (Orange) light.

TIMER
(Green)

SWING
(Orange)

Pi Pi

Indoor unit

Pi ——PiPiPi——

* In the following cases the setting signal is not read and a buzzer

sounds.

The setting of the rotary switch on the PCB is not “00” : Pi Pi
Pi Pi Pi

CHECK ADDRESS SETTING

Press the “SLEEP ” button.

Indoor unit

CORRECT : Pi——PiPiPiPiPi ——

WRONG : Pi————— (3 sec)

PiPi

PiPi

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3 sec ON
1 sec OFF

(Example) ADDRESS : 25

OPERATION
indicator (Red)

TIMER indicator
(Green)

SWING indicator
(Orange)

Flashing times of
address numbers

(1 digit)

0.5 sec ON / 0.5 sec OFF

5 times 1 - 10 sec

0.5 sec ON / 0.5 sec OFF

2 times 1 - 10 sec

Flashing times of
address numbers

(10 digit)

* ADDRESS 0 setting will not indicate TIMER indicator and

SWING indicator .

* ADDRESS display will automatically switched from indoor

unit address to refrigerant circuit address.

3 COMPLETING ADDRESS SETTING

To prevent mistaken reception when performing address set­ting for another indoor unit, press the MANUAL/AUTO button
for 3 seconds to lock the setting*.
* Press the MANUAL/AUTO button again for 3 seconds to

release the setting lock.

4 COMPLETING ADDRESS SETTINGS FOR ALL INDOOR

UNITS

(1) Turn the power OFF on the indoor unit.
(2) Press the ACL button on the wireless remote control.

5. TEST OPERATION

1. TEST OPERATION USING PCB (OUTDOOR UNIT)

• Refer to the Installation Instruction Sheet for the outdoor unit if the PCB for the outdoor unit is to be used for the test operation.

2. TEST OPERATION USING REMOTE CONTROLLER

• Refer to the Installation Instruction Sheet for the remote control unit to perform the test operation using the wireless remote control

unit.

• When the air conditioner is being test run, the OPERATION and TIMER indicators flash slowly at the same time.

6. CHECK LIST

Pay special attention to the check items below when installing the indoor unit(s). After installation is complete, be sure to check the
following check items again.

Table 6.1

Has the indoor unit been installed correctly?

Has there been a check for gas leaks (refrigerant pipes)?

Has heat insulation work been completed?

Does water drain easily from the indoor units?

Is the voltage of the power source the same as that indi­cated on the label on the indoor unit?

Are the wires and pipes all connected completely?

Is the indoor unit grounded?

Is the connection cable the specified thickness?

Are the inlets and outlets free of any obstacles?

After installation is completed, has the proper operation
and handling been explained to the user?

Is the EV kit connected?

If not performed correctly

Vibration, noise, indoor unit may drop

No cooling, No heating

Water leakage

Water leakage

No operation, heat or burn damage

No operation, heat or burn damage

Short circuit

No operation, heat or burn damage

No cooling, No heating

No cooling, No heating

CHECK BOXCHECK ITEMS

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7. ERROR CODES

If you use a wired type remote control, error codes will appear on the remote control display. If you use a wireless remote control, the
lamp on the photodetector unit will output error codes by way of blinking patterns. See the lamp blinking patterns and error codes in the
table below.

Table 7.1

Error display

Error content

(1)

(2)

(1)

(4)

(3)

(1)

(1)

Error code

E:00

E:02

E:04

E:09

E:0b

E:0A

E:11

E:18

E:18

E:13

E:32

E:06

E:1F

E:21

OPERATION

indicator

(2)

(3)

(3)

(4)

(5)

(5)

(6)

Display Method : 0.1 sec. ON / 0.1 sec. OFF flashing

TIMER

indicator

(3)

(4)

(5)

(6)

: 0.5 sec. ON / 0.5 sec. OFF flashing

( ) : Flashing times

SWING

indicator

No error

Model information abnormal

Power supply frequency abnormal

Room temperature thermistor error

Indoor unit heat exchanger thermistor (inlet) error

Indoor unit heat exchanger thermistor (middle) error

Drain abnormal

Communication error 1 (indoor unit ↔ wired / simple remote controller)

Communication error 2 (indoor unit ↔ wired / simple remote controller)

Indoor unit fan error

Outdoor unit error

EEPROM access error

Transmission error

Parallel communication error

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