General AUH24L, AUH24LUAR, AOH24LMAKL, AUH30L, AUH30LUAS Installation Manual

...

Refrigerant

940 mm ( 37")

890 mm ( 35-3/64")

750 mm (29-17/32")

Drain pipe (I.D. 32 mm)

60 mm

(2-3/8")

305.5 mm (12")

298.5 mm (11-3/4")

(2-3/4")

248.5 mm (9-25/32")

70 mm

(3-15/16")

(5")

100 mm

235 mm (9-1/4")

127 mm

Drain pipe (I.D. 32 mm)

60 mm

(2-3/8")

305.5 mm (12")

11-3/4" (298.5 mm)

248.5 mm (9-25/32")

70 mm

(2-3/4")

(3-15/16")

(3-5/8")

100 mm

92 mm

200 mm (7-7/8")

R410A

Cassette Type

SPLIT TYPE AIR CONDITIONER

INSTALLATION INSTRUCTION SHEET

(PART NO. 9374318070)

WARNING

CAUTION

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

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

This air conditioner uses new refrigerant HFC (R410A).

STANDARD PARTS

The following installation parts are furnished. Use them as required.

INDOOR UNIT ACCESSORIES

Name and Shape

Coupler heat insulation

Special nut A (large flange)

Special nut B (small flange)

Template

Blower cover insulation

Q’ty

For indoor side pipe joint

For installing indoor unit

For ceiling hole cutting

For discharged air

Application

INSTALLATION PROCEDURE

Install the air conditioner as follows:

INDOOR UNIT INSTALLATION

WARNING

● Install the air conditioner in a location which can withstand a load do at least five times the weight of the main unit and which will not amplify sound or vibration. If the installation location is not strong enough, the indoor unit may fall and cause injuries.

● If the job is done with the panel frame only, there is a risk that the unit will come loose. Please take care.

REMOVING THE INTAKE GRILLE

(1) Push the intake grille pushbuttons (two places). (2) Open the intake grille.

Fig. 4

PUSH

OPEN

• Pull up while pressing the B section (Fig. 6).

Fig. 6 Part A detail view Fig. 7 Part A section view

Grille hinge wire

(4) Remove the intake grille.

REMOVING THE PANEL FRAME

• Pull up the corner sections (A) of the panel frame as shown in Fig. 8 (4 locations).

Fig. 8 Part A detail view

Fig. 10

Panel frame

Panel base

CAUTION

Always remove the panel frame after removing the intake grille.

Fig. 13

(A) Standard setting

(B) Slender setting

3. BODY INSTALLATION

INSTALLING THE PANEL FRAME

Fig. 16

Panel base

*90° Turn

Panel frame

* With slender setting, turn the panel frame 90° as shown in the dia-

gram above.

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

1 Since the working pressure is 1.6 times higher than that of conventional refrigerant models, some of the piping and instal-

lation and service tools are special. (See the table below.) Especially, when replacing a conventional refrigerant model with a new refrigerant R410A model, always replace the conventional piping and flare nuts with the R410A piping and flare nuts.

2 Models that use refrigerant R410A have a different charging port thread diameter to prevent erroneous charging with con-

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

3 Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with refrigerant models. Also, when

storing the piping, securely seal the openings by pinching, taping, etc.

4 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 tools for R410A

Tool name

Pressure is high and cannot be measured with a conventional gauge. To prevent erroneous mixing of other

Gauge manifold

Charge hose

Vacuum pump

Gas leakage detector

refrigerants, the diameter of each port has been changed. It is recommended the gauge with seals –0.1 to 5.3 MPa (–76 cmHg to 53 kgf/cm2) for high pressure. –0.1 to 3.8 MPa (–76 cmHg to 38 kgf/cm2) for low pressure. 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.

Copper pipes

It is necessary to use seamless copper pipes and it is desirable that the amount of residual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed or discolored portion (especially on the interior surface). Otherwise, the expansion valve or capillary tube may become blocked with contaminants. As an air conditioner using R410A incurs pressure higher than when using conventional refrigerant, it is necessary to choose adequate materials. Thicknesses of copper pipes used with R410A are as shown in Table 1. Never use copper pipes thinner than 0.8 mm (Nominal diameter is 3/8 in.), 1.0 mm (Nominal diameter is 5/8 in.) even when it is available on the market.

Contents of change

Table 1 Thicknesses of Annealed Copper Pipes

Pipe outside diameter

9.52 mm (3/8 in.)

15.88 mm (5/8 in.)

Thickness

0.80 mm

1.00 mm

Hook wire

Binder (small)

Remote controller

Tapping screw (flush heads)

Remote controller cord

For installing intake grille.

For fixing the remote controller cord

For installing the remote controller

For connecting the remote controller

(3) Remove the grille hinge wire.

Fig. 5

• Pull up in the direction of the arrow while holding down the C section of Fig. 9 (4 locations).

Fig. 9 Part B detail view

1. POSITION THE CEILING HOLE AND HANGING BOLTS

Fig. 11

(Grille measurement)

(Hanging bolt position)

(Ceiling opening measurement)

(Hanging bolt position)

2. HANGING PREPARATIONS

• Firmly fasten the hanging bolts as shown in Fig. 12 or by another method.

• Install the hanging bolts at a place where they would be capable of

holding a weight of at least 50 kgf per bolt.

Fig. 12

Hole-in anchor Hole-in plug

Concrete Insert

Hanging bolt M10

[The ceiling rear height is 235 mm (9-1/4") or more.] [Standard setting]

[The ceiling rear height is 200 mm (7-7/8") or more.] [Slender setting] (1) Install special nut A, then special nut B onto the hanging bolt (Fig. 14). (2) Raise the body and mount its hooks onto the hanging bolt between

the special nuts (Fig. 14). (3) Turn special nut B to adjust the height of the body (Fig. 14). (4) Leveling

Using a level, or vinyl hose filled with water, fine adjust so that the

body is level.

WARNING

Perform final tightening by tightening the double nut firmly.

Fig. 14

Special nut B

Hanging bolt

Fig. 15

* Allowable space between the unit and the ceiling 5 mm or less

Special nut A

Hook

30 mm or more

* Must fit tightly against ceiling

without any gap.

After installing the body, tighten the nuts.

Ceiling

Vinyl hose

Grille setting method has been changed at the marked positions on the panel frame and panel base.

Fig. 17

(A) Standard setting (B) Slender setting

Mark

Panel frame

No mark

Fig. 18 (Example)

* Appearance of slender setting

For authorized service personnel only.

WARNING

1 For the air conditioner to operate satisfactorily, install it as outlined in this installation instruction sheet.

2 Connect the indoor unit and outdoor unit with the air conditioner piping and cords available standards parts. This installa-

tion instruction sheet describes the correct connections using the installation set available from our standard parts.

3 Installation work must be performed in accordance with national wiring standards by authorized personnel only.

4 If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contact with a flame, it

produces a toxic gas.

5 Do not use an extension cord.

6 Do not turn on the power until all installation work is complete.

CAUTION

This installation instruction sheet describes how to install the indoor unit only. To install the outdoor unit, refer to the installation instruction sheet included with the outdoor unit.

••

• Be careful not to scratch the air conditioner when handling it.

••

• After installation, explain correct operation to the customer, using the operating manual.

••

• Let the customer keep this installation instruction sheet because it is used when the air conditioner is serviced or moved.

••

SELECTING THE MOUNTING POSITION

WARNING

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

CAUTION

1 Do not install where there is the danger of combustible

gas leakage.

2 Do not install near heat sources.

3 If children under 10 years old may approach the unit,

take preventive measures so that they cannot reach the unit.

Especially, the installation place is very important for the split type air conditioner because it is very difficult to move from place to place after the first installation. Decide the mounting position together with the customer as follows: The discharge direction can be selected as shown below.

Fig. 1

100 mm (4") or more

(4 directions)

Piping position

Since 2-way outlet as shown below causes performance problems, do not set it.

Pipe

(3 directions)

100 mm (4") or more

CAUTION

directions

100 mm (4") or more

Pipe

1,000 mm (39") or more

)

directions

)

INDOOR UNIT

(1) Install the indoor unit on a place having a sufficient strength so that it

withstands against the weight of the indoor unit.

(2) The inlet and outlet ports should not be obstructed; the air should be

able to blow all over the room. (3) Leave the space required to service the air conditioner (Fig. 2). (4) The ceiling rear height as shown in Fig. 3. (5) A place from where the air can be distributed evenly throughout the

room by the unit. (6) A place from where drainage can be extracted outdoors easily. (7) Install the unit where noise and vibrations are not amplified.

Fig. 2

Strong and durable ceiling

1,000 mm (39")

or more

200 mm (7-7/8")

or more

2,300 mm (91")

or more

Obstruction

Floor

This mechanism enables the cassette body to move 35 mm downward and realizes installation to the space of 200 mm. No special works and option is needed.

1,000 mm (39")

Fig. 3

You can select 2-way setting

(B) Slender setting(A) Standard setting

235 mm (9-1/4")

or more

CONNECTION PIPE REQUIREMENT

Table 2

Diameter

••

• Use pipe with water-resistant heat insulation.

••

Small Large

CAUTION

Install heat insulation around both the gas and liquid pipes. Failure to do so may cause water leaks. Use heat insulation with heat resistance above 120 °C. (Reverse cycle model only) In addition, if the humidity level at the installation location of the refrigerant piping is expected to exceed 70%, install heat insulation around the refrigerant piping. If the expected humidity level is 70-80%, use heat insulation that is 15 mm or thicker and if the expected humidity exceeds 80%, use heat insulation that is 20 mm or thicker. If heat insulation is used that is not as thick as specified, condensation may form on the surface of the insulation. In addition, use heat insulation with heat conductivity of

0.045 W/(m·K) or less (at 20 °C).

9.52 mm (3/8 in.)

15.88 mm (5/8 in.)

ELECTRICAL REQUIREMENT

••

• Electric wire size:

••

Table 3

Connection cord (mm2)

••

• Always use H07RN-F or equivalent to the connection cord.

••

• Install the disconnect device with a contact gap of at least 3 mm nearby

••

the units (both indoor unit and outdoor unit).

MAX.

MIN.

2.5

1.5

INSTALLING DRAIN PIPE

CAUTION

Install the drain pipe in accordance with the instructions in this installation instruction sheet and keep the area warm enough to prevent condensation. Problems with the piping may lead to water leaks.

NOTE: Install the drain pipe.

••

• Install the drain pipe with downward gradient (1/50 to 1/100) and so

••

there are no rises or traps in the pipe.

••

• Use general hard polyvinyl chloride pipe (VP25) [outside diameter

••

32 mm (1-1/4")] and connect it with adhesive (polyvinyl chloride) so that there is no leakage.

••

• When the pipe is long, install supporters.

••

• Do not perform air bleeding.

••

• Always heat insulate the indoor side of the drain pipe.

••

• When desiring a high drain pipe height, raise it up to 800 mm (31") or

••

less from the ceiling within a range of 150 mm (6") from the body. A rise dimension over this range will cause leakage.

Fig. 19

Air bleeding

Rise

Trap

150 mm (6") or less

CONNECTING THE PIPING

Supporter

1.5 to 2.0 m (5 to 6.5 ft)

Max. 800 mm (31")

CAUTION

1 Do not use mineral oil on flared part.

Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.

2 While welding the pipes, be sure to blow dry nitrogen

gas through them.

1. FLARING

(1) Cut the connection pipe to the necessary length with a pipe cutter. (2) Hold the pipe downward so that cuttings will not enter the pipe and

remove the burrs.

(3) Insert the flare nut (always use the flare nut attached to the indoor

and outdoor units respectively) onto the pipe and perform the flare processing with a flare tool. Use the special R410A flare tool, or the conventional flare tool. When using the conventional flare tool, always use an allowance adjustment gauge and secure the A dimension shown in table 4.

Fig. 20

Pipe outside diameter

9.52 mm (3/8 in.)

15.88 mm (5/8 in.)

Check if [L] is flared uniformly and is not cracked or scratched.

Die

Pipe

Table 4 Pipe outside diameter

Dimension A (mm)

Flare tool for R410A, clutch type

0 to 0.5

2. BENDING PIPES

The pipes are shaped by your hands. Be careful not to collapse them.

Fig. 21

Extend the pipe by unwinding it.

Do not bend the pipes in an angle more than 90°. When pipes are repeatedly bent or stretched, the material will harden, making it difficult to bend or stretch them any more. Do not bend or stretch the pipes more than three times.

When bending the pipe, do not bend it as is. The pipe will be collapsed. In this case, cut the heat insulating pipe with a sharp cutter as shown in Fig. 22, and bend it after exposing the pipe. After bending the pipe as you want, be sure to put the heat insulating pipe back on the pipe, and secure it with tape.

Fig. 22

Pipe

Heat insulating pipe

Cutter

Cut line

CAUTION

1 To prevent breaking of the pipe, avoid sharp bends.

Bend the pipe with a radius of curvature of 150 mm or over.

2 If the pipe is bent repeatedly at the same place, it will

break.

3. CONNECTION PIPES

Indoor unit side

Fig. 23

Indoor unit

CAUTION

1 Be sure to apply the pipe against the port on the in-

door unit correctly. If the centering is improper, the flare nut cannot be tightened smoothly. If the flare nut is forced to turn, the threads will be damaged.

2 Do not remove the flare nut from the indoor unit pipe

until immediately before connecting the connection pipe.

Large pipe

Small pipe

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. 24).

Fig. 24

Holding spanner

Body side

Torque wrench

To prevent gas leakage, coat the flare surface with alkylbenzene oil (HAB). Do not use mineral oil.

CAUTION

Hold the torque wrench at its grip, keeping it in the right angle with the pipe as shown in Fig. 24, in order to tighten the flare nut correctly.

Table 5 Flare nut tightening torque

Flare nut Tightening torque

9.52 mm (3/8 in.) dia.

15.88 mm (5/8 in.) dia.

Do not remove the cap from the connection pipe before connecting the pipe.

33 to 42 N·m (330 to 420 kgf·cm)

63 to 77 N·m (630 to 770 kgf·cm)

CAUTION

Be sure to connect the large pipe after connecting the small pipe completely.

INSTALLING THE COUPLER

HEAT INSULATION

After checking for gas leaks, insulate by wrapping insulation around the two parts (large and small) of the indoor unit coupling, using the coupler heat insulation. After installing the coupler heat insulation, wrap both ends with vinyl tape so that there is no gap.

Fig. 25

Coupler heat insulation

Body

Be sure to overlap the insulation

CAUTION

Must fit tightly against body without any gap.

No gap

Coupler heat insulation

- Continued on back -

Red

White

Black

OFF

1 2 3 4 5 6

SUMOTUWETH FR

1 2 3

ONOFF

1 2 3 4 5 6

1 2 3 1 2 3 1 2 3

1 2 3

ONOFF

1 2 3 4 5 6

P. D 120

160

45°

ø100

ø70

113

334.2

P. D 88

123

SW 4

123

SW 1

Indoor unit PC board

DAY OFF

DELETE SET

ENERGY

SAVE

THERMO SENSOR

SET BACK

DAY

CLOCK ADJUST

OFF

123

OFF

SW1

OFF

123

SW4

3 2 1

ELECTRICAL WIRING

HOW TO CONNECT WIRING TO THE TERMINALS

A. For solid core wiring (or F-cable)

(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip

the insulation to about 25 mm (15/16") of expose the solid wire.

(2) Using a screwdriver, remove the terminal screw(s) on the terminal

board.

(3) Using pliers, bend the solid wire to form a loop suitable for the

terminal screw.

(4) Shape the loop wire properly, place it on the terminal board and

tighten securely with the terminal screw using a screwdriver.

B. For strand wiring

(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip

the insulation to about 10 mm (3/8") of expose the strand wiring.

(2) Using a screwdriver, remove the terminal screw(s) on the terminal

board.

(3) Using a round terminal fastener or pliers, securely clamp a round

terminal to each stripped wire end.

(4) Position the round terminal wire, and replace and tighten the ter-

minal screw using a screwdriver.

Fig. 26

A. Solid wire

Strip 25 mm (15/16")

Insulation

Wire

B. Strand wire

Loop

Strip 10 mm (3/8")

Screw with special washer

Round terminal

Terminal board

Wire

Round terminal

Screw with special washer

Round terminal

HOW TO FIXED CONNECTION CORD AND POWER CORD AT THE CORD CLAMP

After passing the connection cord and power cord through the insulation tube, fasten it with the cord clamp.

Fig. 27

Insulation tube

1. CONNECTION DIAGRAMS

Fig. 28

Remote controller

Black

White

Red

Power line

Indoor unit side terminal

Control line

Outdoor unit

2. INDOOR UNIT SIDE

WARNING

1 Before starting work, check that power is not being sup-

plied to the indoor unit and outdoor unit.

2 Match the terminal board numbers and connection cord

colors with those of the outdoor unit. Erroneous wiring may cause burning of the electric parts.

3 Connect the connection cord firmly to the terminal

board. Imperfect installation may cause a fire.

4 Always fasten the outside covering of the connection

cord with the cord clamp. (If the insulator is chafed, electric leakage may occur.)

5 Always connect the ground wire.

(1) Remove the control box cover and cover (wire) B and install the con-

nection cord.

Fig. 29

Cover (wire) B

(2) After wiring is complete, clamp the remote controller cord and con-

nection cord with the cord clamp.

(3) Install the control box cover and cover (wire) B.

Fig. 30

Cord clamp

Connection cord (To the outdoor unit)

Remote controller cord

Fig. 31

Connection cord

OUTDOOR UNIT

Terminal board (Indoor unit)

Remote controller

Terminal board

Ceiling height setting

Set the DIP switch for the ceiling height according to the table below.

Table 6

Ceiling height

(m)

2.5 - 3.0

3.0 - 3.5

More than 3.5

Less than 2.5

Normal

High ceiling 1

High ceiling 2

Low ceiling

DIP-SW4

–

OFF

Fig. 32

GRILLE INSTALLATION

BLOWER COVER INSULATION

Install the blower cover insulation only when the outlet direction is not specified. Two blower cover insulations are packed with the indoor unit. Install the blower cover insulation at the diffuser position shown in Fig. 33. At this time, use the piping position as the criteria.

Fig. 33

2 direction example

Panel base

Drain pan

Blower cover insulation

(Piping direction)

INSTALLING THE INTAKE GRILLE

(1) Mount the grille hinge wire to the hook shaft as shown in Fig. 34.

Fig. 34

A-A Section view

(2) Install the hook wire.

• Pass the hook wire through the panel base from the rear side as shown in Fig. 37, and fasten to the reinforced metal fitting of the intake grille using a screw.

Fig. 37

Hook wire

RFM (grille)

Fig. 38 Section view

Hook wire

Screw

(3) Loosen the screw, put the loop of the hook wire over it, and tighten

the screw again.

CAUTION

Install the intake grille hook wire to the grille assembly. If it falls, it may cause injuries.

(4) Bring up the intake grille by pushing it up at an angle as shown in

Figs. 39, 40, and fasten.

Fig. 39

REMOTE CONTROLLER

SETTING

CAUTION

1 In order to detect the room temperature

correctly when using the temperature sensor of the remote controller, do not install the remote controller in a place where it will be exposed to direct sunlight or directly below the air outlet of the indoor unit.

2 When installing the remote controller and cord near a

source of electromagnetic waves, separate the remote controller from the source of the electromagnetic waves and use shielded cord.

3 Do not touch the remote controller PC board and PC

board parts directly with your hands.

1. INSTALLING THE REMOTE CONTROLLER

(1) Open the operation panel on the front of the remote controller, remove

the two screws indicated in the following figure, and then remove the front case of the remote controller.

Fig. 41

Screws

When installing the remote controller, remove the connector from the front case. The wires may break if the connector is not removed and the front case hangs down. When installing the front case, connect the connector to the front case.

(2) Install the rear case to the wall, etc. with the two tapping screws.

Refer to the following information to install the remote controller wires.

Fig. 42

Front case

Front case (back side)

Connector

Temperature sensor

Rear case

Remote controller wires

2. ROUTING THE REMOTE CONTROLLER WIRES

(1) Install the remote controller wires to the terminals on the top of the

rear case as shown in the following figure. (2) Fasten the wires with the binder. (3) If the remote controller wires run through the room, use a tool to cut

away the thin area on the upper center of the front case.

Fig. 43 (Example)

Binder

1. Red

2. White

3. Black

3. SETTING THE DIP SWITCHES

When using a battery (memory backup)

Fig. 44

DIP Switch

Change the DIP switch setting to use batteries. (The DIP switch is not set to use batteries at the factory.) Change DIP switch No. 6 from OFF to ON. If batteries are not used, all of the settings stored in memory will be deleted if there is a power failure.

4. SETTING THE ROOM TEMPERATURE DETECTION LOCATION

The detection location of the room temperature can be selected from the following three examples. Choose the detection location that is best for the installation location.

A. Indoor unit setting (factory setting)

The room temperature is detected by the indoor unit temperature sensor.

Indoor unit

(1) When the THERMO SENSOR button is pressed, the lock display

flashes because the function is locked at the factory.

Fig. 45

B. Remote controller setting

The room temperature is detected by the remote controller temperature sensor.

Indoor unit

(1) Press the THERMO SENSOR button for 5

seconds or more to unlock the function. The thermo sensor display flashes and then disappears when the function is unlocked.

(2) Press the THERMO SENSOR button. The thermo sensor display ap-

pears.

(3) Press the THERMO SENSOR button again for 5 seconds or more to

lock the function. The thermo sensor display flashes and then remains on when the function is locked.

(4) Make sure that the function is locked.

C.Indoor unit/remote controller setting

(room temperature sensor selection)

The temperature sensor of the indoor unit or the remote controller can be used to detect the room temperature.

Indoor unit

Fig. 46

Insulation tube Cord clamp

Use VW-1, 0.5 to 1.0 mm thick, PVC tube as the insulation tube.

TEST RUN

CAUTION

Supply power to the crankcase heater for at least 12 hours before the start of operation in winter.

(1) Stop the air conditioner operation. (2) Press the master control button and the fan control button simultane-

ously for 2 seconds or more to start the test run.

Fig. 48

Test run display

(3) Press the start/stop button to stop the test run.

[SELF-DIAGNOSIS]

When the error indication “E:EE” is displayed, follow the following items to perform the self-diagnosis. “E:EE” indicates an error has occurred.

1. REMOTE CONTROLLER DISPLAY

(1) Stop the air conditioner operation.

(2) Press the set temperature buttons

onds or more to start the self-diagnosis. Refer to the following tables for the description of each error code.

Fig. 49

Unit number (usually 0)

(3) Press the set temperature buttons simultaneously for 5 sec-

onds or more to stop the self-diagnosis.

Table 7

Error code Error contents

Communication error (indoor unit

Communication error (indoor unit outdoor unit)

Room temperature sensor open

Room temperature sensor short-circuited

Indoor heat exchanger temperature sensor open

Indoor heat exchanger temperature sensor shortcircuited

Outdoor heat exchanger temperature sensor

Power source connection error

Float switch operated

Outdoor temperature sensor

Discharge pipe temperature sensor

Model abnormal

Indoor fan abnormal

remote controller)

00 01 02

03 04 05

06 08 09

0c 11 12

simultaneously for 5 sec-

Error code

Ex. Self-diagnosis

Control box cover

Error code Error contents

Outdoor signal abnormal

13 14 15 16 17

18 19

1b 1c 1d

2. CHECKING DRAINAGE

To check the drain, remove the water cover and fill with 2 to 3rof water as shown in Fig. 50. The drain pump operates when operating in the cooling mode.

Fig. 50

Excessive outdoor pressure (permanent stop)

Compressor temperature sensor

Pressure switch error

IPM error

CT error

Active filter module (AFM) error

Compressor does not operate

Outdoor unit fan error

Communication error (inverter multicontroller)

2 way valve sensor error

Expansion valve error

Connection indoor unit error

Drain pipe

Water cover

Watering pot

Dip switch (SW4)

Indoor unit PC board

CAUTION

1 If the setting for a low ceiling is selected, the capacity

of the air conditioner decreases slightly.

2 Do not set any switches other than those specified in

this sheet. The air conditioner may not operate correctly if any switches other than those specified are changed.

SPECIAL INSTALLATION

METHODS

CAUTION

1 When setting the rotary switch and DIP switches, do

not touch any other parts on the circuit board directly with your bare hands.

2 Be sure to turn off the main power.

1. GROUP CONTROL SYSTEM

A number of indoor units can be operated at the same time using a single remote controller.

(1) Wiring method (indoor unit to remote controller)

Fig. 51

Indoor unit No. 0 Indoor unit No. 1 Indoor unit No. 2 Indoor unit No. 3

Remote controller wire

(2) Rotary switch setting (indoor unit)

Set the unit number of each indoor unit using the rotary switch on the indoor unit circuit board. The rotary switch is normally set to 0.

(3) DIP switch setting (remote controller)

Change DIP switch No. 3 on the remote controller from OFF to ON.

Fig. 52 Fig. 53

2. DUAL REMOTE CONTROLLERS (OPTIONAL)

Two separate remote controllers can be used to operate the indoor units.

(1) Wiring method (indoor unit to remote controller)

Fig. 54

Remote controller wire

(2) DIP switch setting (remote controller)

Set the remote controller DIP switch Nos. 1 and 2 according to the following table.

Number of remote controllers

1 (Normal)

2 (Dual)

Number of remote controllers

1 (Normal)

2 (Dual)

Remote controller

Indoor unit

SW3

Rotary Switch

Indoor unit

Master

unit

Table 8

Master unit

DIP-SW No. 1

OFF

Table 9

Slave unit

DIP-SW No. 1

–

Remote controller

DIP-SW No. 2

OFF

DIP-SW No. 2

–

Remote controller

DIP Switch

Slave

unit

Fig. 55

Remote controller

DIP Switch

• Latch the grille hinge wire to the hook shaft, and fasten.

Fig. 35 Part A detail view Fig. 36 Part A section view

Hook shaft

Grille hinge wire

3. AUTO RESTART

• When the air conditioner power was temporarily turned off by a power failure etc., it restarts automatically after the power recovers. (Operated by setting before the power failure)

The auto restart function can be canceled.

(1) DIP switch setting (indoor unit)

Change the DIP switch (SW1-1) on the indoor unit circuit board from ON to OFF. The auto restart function will be canceled.

Fig. 56

Indoor unit

DIP Switch

[DIP-SWITCH SETTING]

● Indoor unit

Table 10

SW state

OFF ON

Detail

Temperature correction setting

Air flow setting

DIP-Switch 1

DIP-Switch 4

NO.

1 Invalidity Validity ✽ Auto restart setting

2 ——✽

3 ——✽

1 — ✽ — Remote controller setting

2 — ✽ —

3 — ✽ —

● Remote controller

Table 11

SW state

OFF ON

One unit

✽ Multiple unit Group control setting

Heat & Cool model

Cooling only model

Detail

Dual remote controller setting

Model setting

DIP-Switch

NO.

1 ✽

2 ✽

5 Invalidity Validity ✽ Auto changeover setting

6 Invalidity✽ Validity Memory backup setting

✽ : Factory setting

OPENING THE DUCT CONNECTION HOLE

Fig. 57

Distribution duct

Fresh air

Distribution duct

Fig. 40

CAUTION

1 When performing hole opening work, be careful not to

damage the drain pan.

2 When connecting the distribution duct, to make the air

flow easily, block the outlet port with the blower cover insulation as shown by the hatched lines in Fig. 57. For the blocking direction, refer to Fig. 33.

1. DIMENSION

Screw position and connection hole which are fresh air duct and distribution duct.

Fig. 58

12-ø3.3 self tapping screw holes (for 4 mm)

Unit: mm

2. DISTRIBUTION DUCT AND FRESH AIR DUCT HOLE PROCESSING

Use the distribution duct hole and fresh air duct hole by removing the insulation material as shown below.

Fig. 59

Cut

Cabinet

Cut

• Cut off the part (Cabinet) indicated by the arrow in the Fig. 59 with

nippers, needle nose pliers, etc.

Fig. 60

Knife

Insulation (Inner box)

• Open the holes and cut the insulation with a knife.

* Be careful not to damage the internal parts. * Be careful not to cut yourself on the cutout in the metal plate. * Please remove the insulation (inner box) left over after cutting.

• Connect the distribution duct.

* When mounting the duct, block the gap so that there is no cold air leakage. * Insulate the duct and cut connection.

CAUTION

The air conditioner cannot take in fresh air by itself. When connecting a fresh air duct, always use a duct fan.

Cabinet

Connector

PART NO. 9374318070

Rear case

(1) Press the THERMO SENSOR button for 5 seconds or more to unlock

the function. The thermo sensor display flashes and then disappears when the function is unlocked.

(2) Press the THERMO SENSOR button to select the temperature sen-

sor of the indoor unit or the remote controller.

Fig. 47

NOTES

If the function to change the temperature sensor is used as shown in examples A and B (other than example C), be sure to lock the detection location. If the function is locked, the lock display will flash when the THERMO SENSOR button is pressed.