Toshiba RAS-13JKCVP, RAS-13JACVP, RAS-10JKCVP, RAS-10JACVP SERVICE MANUAL

FILE NO. A03-001

Revised:5/July/2004

SPLIT TYPE

RAS-10JKCVP

RAS-10J A CVP

RAS-13JKCVP

RAS-13J A CVP

PRINTED IN JAPAN, Jul.,2004 ToMo

CONTENTS

1. SPECIFICATIONS ..................................................................................... 3

2. REFRIGERANT R410A ............................................................................. 5

3. CONSTRUCTION VIEWS ........................................................................ 13

4. WIRING DIAGRAM.................................................................................. 15

5. SPECIFICATIONS OF ELECTRICAL PARTS ......................................... 16

6. REFRIGERANT CYCLE DIAGRAM ........................................................ 17

7. CONTROL BLOCK DIAGRAM................................................................ 18

8. OPERATION DESCRIPTION................................................................... 20

9. INSTALLATION PROCEDURE................................................................ 36

10. HO W T O DIA GNOSE THE TROUBLE...................................................... 47

11. HOW TO REPLACE THE MAIN PARTS................................................... 68

12. EXPLODED VIEWS AND PARTS LIST................................................... 81

– 2 –

1. SPECIFICATIONS

1-1. Specifications

RAS-10JKCVP/RAS-10JACVP, RAS-13JKCVP/RAS-13JACVP

Unit model

Cooling capacity (kW) 2.5 3.5
Cooling capacity range (kW) 0.6–3.4 0.6–4.2
Power supply 1Ph/50Hz/220–240 V, 1Ph/60Hz/220 V
Electric

characteristics

COP (Cooling) 4.39 3.68
Operating

noise

Indoor unit

Outdoor unit

Piping
connection

connection

Accessory Indoor unit

Indoor
Outdoor

Indoor

Outdoor

Indoor

Outdoor (Cooling) (dB•A) 45 48
Unit model
Dimension

Net weight (kg) 10 10
Fan motor output (W) 30 30
Air flow rate (Cooling) (m³/h) 550 560
Unit model
Dimension

Net weight (kg) 33 33
Compressor

Fan motor output (W) 43 43
Air flow rate (Cooling) (m³/h) 2150 2410
Type Flare connection Flare connection

Maximum length (m) 25 25
Maximum chargeless length (m) 15 15
Maximum height difference (m) 10 10
Name of refrigerant R410A R410ARefrigerant
Weight (kg) 0.9 0.9
Power supply 3 Wires : includes earth (Outdoor) 3 Wires : includes earth (Outdoor)Wiring
Interconnection 4 Wires : includes earth 4 Wires : includes eart h

Operation mode
Running current (A) 0.15 0.15
Power cons um ption (W) 30 30
Power factor (%) 87 87
Operation mode
Running current (A) 2.73/2.60/2.49 4.65/4.44/4.25
Power cons um ption (W) 540 920
Power factor (%) 90 90
Starting current (A) 2.88/2.75/2.64 4.80/4.59/4.40

High (Cooling) (dB•A) 42 43
Medium (Cooling) (dB•A) 33 34
Low (Cooling) (dB•A) 25 26

Height (mm) 250 250
Width (mm) 790 790
Depth (mm) 208 208

Height (mm) 550 550
Width (mm) 780 780
Depth (mm) 270 270

Motor output (W) 750 750
Type Twin rotary type with DC-i nvert er variable speed control
Model DA91A1F-45F DA91A1F-45F

Liquid side Ø6.35 Ø6.35Indoor unit
Gas side Ø9.52 Ø9.52
Liquid side Ø6.35 Ø6.35Outdoor unit
Gas side Ø9.52 Ø9.52

Indoor (Cooling) (°C) 21–32 21–32Usable temperature range
Outdoor (Cooling) (°C) 10–46 10–46
Installation plate 1 1
Wireless remote controller 1 1
Batteries 2 2
Remote controller holder 1 1
Zeolite-plus filter 1 1
Zeolite-3G filter 1 1
Mounting screw 6 (Ø4 x 25L) 6 (Ø4 x 25L)
Flat head wood screw 2 (Ø3. 1 x 16L) 2 (Ø3.1 x 16L)
Dust collect i n g un it 1 1
Installation manual 1 1
Owner’s manual 1 1
Pattern 1 1

RAS-10JKCVP RAS-13JKCVP
RAS-10JACVP RAS-13JACVP

Cooling

Cooling

RAS-10JKCVP RAS-13JKCVP

RAS-10JACVP RAS-13JACVP

• The specifications may be subject to change without notice for purpose of improvement.

– 3 –

1-2. Operation Characteristic Curve

<Cooling>

8
7
6
5
4

Current (A)

3
2
1
0

0 20406080 120100

RAS-10JKCVP
RAS-13JKCVP

• Conditions
Indoor : DB 27˚C/WB 19˚C
Outdoor : DB 35˚C
Air flow : High
Pipe length : 5m
Voltage : 230V

Compressor speed (rps)

1-3. Capacity Variation Ratio According to Temperature

<Cooling>

110

100

90

80

70

Capacity ratio (%)

60

50

32 34 36 38 40 4233 35 37 39 41 43 44 45 46

RAS-10JKCVP
RAS-13JKCVP

Outdoor temp. (˚C)

1-4. Pipe Length-Capacity Characterisitic

<Cooling>

120

110

100

90

80

Capacity (%)

70

RAS-10JKCVP
RAS-13JKCVP

• Conditions
Indoor : DB27˚C/WB19˚C
Indoor air flow : High
Pipe length : 5m

Capacity ratio : 100% =

*

3.5 kW (RAS-13JKCVP)

2.5 kW (RAS-10JKCVP)

20g/m is added for 15m or more.

*

60

50

0 5 10 15 20 25 30

Pipe length (m)

– 4 –

Capacity ratio : 100% =

*

3.5 kW (RAS-13JKCVP)

2.5 kW (RAS-10JKCVP)

2. REFRIGERANT R410A

This air conditioner adopts the new refrigerant HFC
(R410A) which does not damage the ozone layer.

The working pressure of the new refrigerant R410A
is 1.6 times higher than conventional refrigerant
(R22). The refrigerating oil is also changed in
accordance with change of refrigerant, so be careful
that water, dust, and existing refrigerant or refrigerat­ing oil are not entered in the refrigerant cycle of the
air conditioner using the new refrigerant during
installation work or servicing time.

The next section describes the precautions for air
conditioner using the new refrigerant. Conforming to
contents of the next section together with the
general cautions included in this manual, perform
the correct and safe work.

2-1. Safety During Installation/Servicing

As R410A’s pressure is about 1.6 times higher than
that of R22, improper installation/servicing may
cause a serious trouble. By using tools and materi­als exclusiv e for R410A, it is necessary to carry out
installation/servicing safely while taking the following
precautions into consideration.

(1) Nev er use refriger ant other than R410A in an air

conditioner which is designed to operate with
R410A.

If other refrigerant than R410A is mixed, pres­sure in the refrigeration cycle becomes abnor­mally high, and it may cause personal injury, etc.
by a rupture.

(2) Confirm the used refrigerant name, and use

tools and materials exclusiv e for the refrigerant
R410A.

The refrigerant name R410A is indicated on the
visible place of the outdoor unit of the air condi­tioner using R410A as refrigerant. To prevent
mischarging, the diameter of the service port
differs from that of R22.

(3) If a refrigeration gas leakage occurs during

installation/servicing, be sure to ventilate fully.
If the refrigerant gas comes into contact with fire,

a poisonous gas may occur.

(4) When installing or removing an air conditioner,

do not allow air or moisture to remain in the
refrigeration cycle. Otherwise, pressure in the
refrigeration cycle may become abnormally high
so that a rupture or personal injury may be
caused.

(5) After completion of installation work, check to

make sure that there is no refrigeration gas
leakage.

If the refrigerant gas leaks into the room, coming
into contact with fire in the fan-driven heater,
space heater, etc., a poisonous gas may occur.

(6) When an air conditioning system charged with a

large volume of refrigerant is installed in a small
room, it is necessary to exercise care so that,
even when refrigerant leaks , its concentration
does not exceed the marginal level.

If the refrigerant gas leakage occurs and its
concentration exceeds the marginal level, an
oxygen starvation accident may result.

(7) Be sure to carry out installation or removal

according to the installation manual.
Improper installation may cause refrigeration

trouble, water leakage, electric shock, fire, etc.

(8) Unauthorized modifications to the air conditioner

may be dangerous. If a breakdown occurs
please call a qualified air conditioner technician
or electrician.

Improper repair’s may result in water leakage,
electric shock and fire, etc.

2-2. Refrigerant Piping Installation

2-2-1. Piping Materials and Joints Used

For the refrigerant piping installation, copper pipes
and joints are mainly used. Copper pipes and joints
suitable for the refrigerant must be chosen and
installed. Furthermore, it is necessary to use clean
copper pipes and joints whose interior surfaces are
less affected by contaminants.

(1) Copper Pipes

It is necessary to use seamless copper pipes
which are made of either copper or copper alloy
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 R22, it is
necessary to choose adequate materials.

Thicknesses of copper pipes used with R410A
are as shown in Table 2-2-1. Never use copper
pipes thinner than 0.8 mm even when it is
available on the market.

– 5 –

Table 2-2-1 Thicknesses of annealed copper pipes

Thickness (mm)

Nominal diameter

1/4
3/8
1/2
5/8

(2) Joints

For copper pipes, flare joints or socket joints are
used. Prior to use, be sure to remove all con­taminants.

a) Flare Joints

Flare joints used to connect the copper pipes
cannot be used for pipings whose outer
diameter exceeds 20 mm. In such a case,
socket joints can be used.

Sizes of flare pipe ends, flare joint ends and
flare nuts are as shown in Tables 2-2-3 to 2­2-6 below .

Outer diameter (mm)

6.35

9.52

12.70

15.88

R410A R22

0.80 0.80

0.80 0.80

0.80 0.80

1.00 1.00

b) Socket Joints

Socket joints are such that they are brazed
for connections, and used mainly f or thick
pipings whose diameter is larger than 20 mm.

Thicknesses of socket joints are as shown in
Table 2-2-2.

Table 2-2-2 Minimum thicknesses of socket joints

Nominal diameter

1/4
3/8
1/2
5/8

Reference outer diameter of

copper pipe jointed (mm)

2-2-2. Processing of Piping Materials

When performing the refrigerant piping installation,
care should be taken to ensure that water or dust
does not enter the pipe interior, that no other oil
other than lubricating oils used in the installed air
conditioner is used, and that refrigerant does not
leak. When using lubricating oils in the piping
processing, use such lubricating oils whose water
content has been removed. When stored, be sure to
seal the container with an airtight cap or any other
cover.

Minimum joint thickness

(mm)

6.35

9.52

12.70

15.88

(1) Flare Processing Procedures and Precautions

a) Cutting the Pipe

By means of a pipe cutter, slowly cut the pipe
so that it is not deformed.

b) Removing Burrs and Chips

If the flared section has chips or burrs,
refrigerant leakage may occur. Carefully
remove all b urrs and clean the cut surface
before installation.

c) Insertion of Flare Nut

0.50

0.60

0.70

0.80

– 6 –

d) Flare Processing

Make certain that a clamp bar and copper
pipe have been cleaned.

By means of the clamp bar, perform the flare
processing correctly.

Use either a flare tool for R410A or conven­tional flare tool.

Flare processing dimensions differ according
to the type of flare tool. When using a
conventional flare tool, be sure to secure
“dimension A” by using a gauge for size
adjustment.

Table 2-2-3 Dimensions related to flare processing for R410A

ØD

A

Fig. 2-2-1 Flare processing dimensions

Nominal

diameter

1/4
3/8
1/2
5/8

Nominal

diameter

1/4
3/8

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

Thickness

(mm)

0.8

0.8

0.8

1.0

Flare tool for R410A

clutch type

0 to 0.5 1.0 to 1.5 1.5 to 2.0
0 to 0.5 1.0 to 1.5 1.5 to 2.0
0 to 0.5 1.0 to 1.5 2.0 to 2.5
0 to 0.5 1.0 to 1.5 2.0 to 2.5

Table 2-2-4 Dimensions related to flare processing for R22

A (mm)

A (mm)

Outer

diameter

(mm)

6.35

9.52

Thickness

(mm)

0.8

0.8

Flare tool for R410A

clutch type

0 to 0.5 0.5 to 1.0 1.0 to 1.5
0 to 0.5 0.5 to 1.0 1.0 to 1.5

Conventional flare tool

Clutch type Wing nut type

Conventional flare tool

Clutch type Wing nut type

1/2
5/8

Nominal

diameter

1/4
3/8
1/2
5/8

12.70

15.88

0.8

1.0

0 to 0.5 0.5 to 1.0 1.5 to 2.0
0 to 0.5 0.5 to 1.0 1.5 to 2.0

Table 2-2-5 Flare and flare nut dimensions for R410A

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

Thickness

(mm)

0.8

0.8

0.8

1.0

ABCD

9.1 9.2 6.5 13

13.2 13.5 9.7 20

16.6 16.0 12.9 23

19.7 19.0 16.0 25

Dimension (mm)

– 7 –

Flare nut

width

(mm)

17
22
26
29

Table 2-2-6 Flare and flare nut dimensions for R22

Nominal

diameter

1/4
3/8
1/2
5/8
3/4

Outer

diameter

(mm)

6.35

9.52

12.70

15.88

19.05

Thickness

(mm)

0.8

0.8

0.8

1.0

1.0

45˚ to 46

Dimension (mm)

Flare nut

width

ABCD

9.0 9.2 6.5 13

13.0 13.5 9.7 20

16.2 16.0 12.9 20

19.7 19.0 16.0 23

23.3 24.0 19.2 34

˚

B A

D

C

(mm)

17
22
24
27
36

Fig. 2-2-2 Relations between flare nut and flare seal surface

(2) Flare Connecting Procedures and Precautions

a) Make sure that the flare and union portions

do not have any scar or dust, etc.

b) Correctly align the processed flare surface

with the union axis.

c) Tighten the flare with designated torque by

means of a torque wrench. The tightening
torque for R410A is the same as that for
conventional R22. Incidentally, when the
torque is weak, the gas leakage may occur.

Table 2-2-7 Tightening torque of flare for R410A [Reference values]

Nominal

diameter

Outer

diameter

(mm)

Tightening torque

N•m (kgf•cm)

43˚ to 45

˚

When it is strong, the flare nut may crack and
may be made non-removable. When choos­ing the tightening torque, comply with values
designated by manufacturers. Table 2-2-7
shows reference v alues.

NOTE :

When applying oil to the flare surface, be sure to use
oil designated by the manuf acturer. If any other oil is
used, the lubricating oils may deteriorate and cause
the compressor to burn out.

Tightening torque of torque

wrenches available on the market

N•m (kgf•cm)

1/4
3/8
1/2
5/8

6.35

9.52

12.70

15.88

14 to 18 (140 to 180)
33 to 42 (330 to 420)
50 to 62 (500 to 620)
63 to 77 (630 to 770)

– 8 –

16 (160), 18 (180)

42 (420)
55 (550)
65 (650)

2-3. Tools

2-3-1. Required T ools

The service port diameter of packed valve of the outdoor unit in the air conditioner using R410A is changed to
prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions
and opposite side dimension of flare nut (For Ø12.7 copper pipe) of the refrigerant piping are lengthened.

The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge,
clogging of capillary, etc. Accordingly, the tools to be used are classified into the follo wing three types.

(1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))
(2) Tools exclusiv e for R410A, but can be also used for con ventional refrigerant (R22)
(3) Tools commonly used for R410A and for conventional refrigerant (R22)
The table below shows the tools exclusive for R410A and their interchangeability.

Tools exclusive for R410A (The following tools for R410A are required.)

Tools whose specifications are changed for R410A and their interchangeability

Conventional air

conditioner installation

Whether new equipment
can be used with
conventional refrigerant

¡

(Note 1)

*

X

X

¡

¡

X

¡

X

No.

1

2

3
4

5
6

7
8

9

10

Used tool

Flare tool
Copper pipe gauge for

adjusting projection
margin

Torque wrench
(For Ø12.7)

Gauge manifold
Charge hose

Vacuum pump adapter
Electronic balance for

refrigerant charging
Refrigerant cylinder
Leakage detector
Charging cylinder

Usage

Pipe flaring
Flaring by

conventional flare
tool

Connection of flare
nut

Evacuating,
refrigerant charge,
run check, etc.

Vacuum evacuating
Refrigerant charge

Refrigerant charge
Gas leakage check
Refrigerant charge

Yes

Yes

Yes

Yes

Yes
Yes

Yes
Yes

R410A

Whether
conventional
equipment
can be used

(Note 1)

*

(Note 1)

*

air conditioner installation

Existence of
new equipment
for R410A

(Note 2)

X

X

X
X

X
X
X

(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection

margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.

(Note 2) Charging cylinder for R410A is being currently developed.

General tools (Conventional tools can be used.)

In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary
as the general tools.

(1) Vacuum pump

Use vacuum pump by

attaching vacuum pump adapter.
(2) Torque wrench (For Ø6.35, Ø9.52)
(3) Pipe cutter
(4) Reamer

(5) Pipe bender
(6) Level vial
(7) Screwdriver (+, –)
(8) Spanner or Monkey wrench
(9) Hole core drill (Ø65)

(10) Hexagon wrench

(Opposite side 4mm)

(11) Tape measure
(12) Metal saw

Also prepare the following equipments for other installation method and run check.

(1) Clamp meter
(2) Thermometer

(3) Insulation resistance tester
(4) Electroscope

– 9 –

2-4. Recharging of Refrigerant

When it is necessary to recharge refrigerant, charge the specified amount of new refrigerant according to the
following steps .

Recover the refrigerant, and check no refrigerant
remains in the equipment.

Connect the charge hose to packed valve service
port at the outdoor unit’s gas side.

Connect the charge hose to the vacuum pump
adapter.

Open fully both packed valves at liquid and gas
sides.

When the compound gauge’s pointer has indicated
–0.1 Mpa (–76 cmHg), place the handle Low in the
fully closed position, and turn off the vacuum pump’s
power switch.

Keep the status as it is for 1 to 2 minutes, and ensure
that the compound gauge’s pointer does not return.

Set the refrigerant cylinder to the electronic balance,
connect the connecting hose to the cylinder and the
connecting port of the electronic balance, and charge
liquid refrigerant.

Place the handle of the gauge manifold Low in the
fully opened position, and turn on the vacuum pump’s
power switch. Then, evacuating the refrigerant in the
cycle.

(For refrigerant charging, see the figure below.)

(1) Nev er charge refrigerant exceeding the specified amount.
(2) If the specified amount of refrigerant cannot be charged, charge refrigerant bit by bit in COOL mode.
(3) Do not carry out additional charging.

When additional charging is carried out if refrigerant leaks, the refrigerant composition changes in the
refrigeration cycle, that is characteristics of the air conditioner changes, refrigerant exceeding the
specified amount is charged, and working pressure in the refrigeration cycle becomes abnormally high
pressure, and may cause a rupture or personal injury.

(INDOOR unit)

(Liquid side)

(OUTDOOR unit)

Opened

Refrigerant cylinder

(With siphon pipe)

Check valve

Open/Close valve

for charging

Electronic balance for refrigerant charging

Fig. 2-4-1 Configuration of refrigerant charging

(Gas side)

Closed

Service port

– 10 –

(1) Be sure to make setting so that liquid can be charged.
(2) When using a cylinder equipped with a siphon, liquid can be charged without turning it upside down.

It is necessary for charging refrigerant under condition of liquid because R410A is mixed type of refrigerant.
Accordingly, when charging refrigerant from the refrigerant cylinder to the equipment, charge it turning the
cylinder upside down if cylinder is not equipped with siphon.

[ Cylinder with siphon ] [ Cylinder without siphon ]

Gauge manifold

OUTDOOR unit

Refrigerant

cylinder

Gauge manifold

OUTDOOR unit

cylinder

Refrigerant

Electronic

balance

R410A refrigerant is HFC mixed refrigerant.
Therefore, if it is charged with gas , the composi­tion of the charged refrigerant changes and the
characteristics of the equipment varies.

2-5. Brazing of Pipes

2-5-1. Materials for Brazing

(1) Silver brazing filler

Silver brazing filler is an alloy mainly composed
of silver and copper. It is used to join iron,
copper or copper alloy, and is relatively expen­sive though it excels in solderability.

Electronic

balance

Siphon

Fig. 2-4-2

(1) Phosphor bronze brazing filler tends to react

with sulfur and produce a fragile compound
water solution, which may cause a gas
leakage. Therefore, use any other type of
brazing filler at a hot spring resort, etc., and
coat the surface with a paint.

(2) When performing brazing again at time of

servicing, use the same type of brazing filler.

(2) Phosphor bronze brazing filler

Phosphor bronze brazing filler is generally used
to join copper or copper alloy.

(3) Low temperature brazing filler

Low temperature brazing filler is generally called
solder, and is an alloy of tin and lead. Since it is
weak in adhesive strength, do not use it for
refrigerant pipes.

2-5-2. Flux

(1) Reason why flux is necessary

• By removing the oxide film and any foreign
matter on the metal surface, it assists the flo w
of brazing filler.

• In the brazing process, it prevents the metal
surface from being oxidized.

• By reducing the brazing filler’s surface tension,
the brazing filler adheres better to the treated
metal.

– 11 –

(2) Characteristics required for flux

Nitrogen gas

cylinder

Pipe

Flow meter

M

Stop valve

From Nitrogen cylinder

Nitrogen
gas

Rubber plug

• Activated temperature of flux coincides with
the brazing temperature.

• Due to a wide effective temperature range, flux
is hard to carbonize.

• It is easy to remove slag after brazing.

• The corrosive action to the treated metal and

brazing filler is minimum.

• It excels in coating performance and is harm­less to the human body.

As the flux works in a complicated manner as
described above, it is necessary to select an
adequate type of flux according to the type and
shape of treated metal, type of brazing filler and
brazing method, etc.

(3) Types of flux

• Noncorrosive flux

Generally, it is a compound of borax and boric
acid.
It is effective in case where the br azing tem­perature is higher than 800°C.

• Activated flux

Most of fluxes generally used for silver brazing
are this type.
It features an increased oxide film removing
capability due to the addition of compounds
such as potassium fluoride, potassium chloride
and sodium fluoride to the borax-boric acid
compound.

(4) Piping materials for brazing and used braz-

ing filler/flux

2-5-3. Brazing

As brazing work requires sophisticated techniques,
experiences based upon a theoretical knowledge, it
must be performed by a person qualified.

In order to prevent the oxide film from occurring in
the pipe interior during brazing, it is effective to
proceed with brazing while letting dry Nitrogen gas
(N2) flow.

Never use gas other than Nitrogen gas.

(1) Brazing method to prevent oxidation

1) Attach a reducing valve and a flow-meter to
the Nitrogen gas cylinder.

2) Use a copper pipe to direct the piping mate­rial, and attach a flow-meter to the cylinder.

3) Apply a seal onto the clearance between the
piping material and inserted copper pipe for
Nitrogen in order to prevent backflow of the
Nitrogen gas.

4) When the Nitrogen gas is flowing, be sure to
keep the piping end open.

5) Adjust the flow rate of Nitrogen gas so that it
is lower than 0.05 m3/Hr or 0.02 MPa
(0.2kgf/cm2) by means of the reducing valve.

6) After performing the steps above, keep the
Nitrogen gas flowing until the pipe cools
down to a certain extent (temperature at
which pipes are touchable with hands).

7) Remove the flux completely after brazing.

Copper - Copper

(1) Do not enter flux into the refrigeration cycle.
(2) When chlorine contained in the flux remains

(3) When adding water to the flux, use water

(4) Remove the flux after brazing.

Piping

material

Used brazing Used

filler flux

Phosphor copper Do not use

Copper - Iron

Iron - Iron

Silver Paste flux
Silver Vapor flux

within the pipe, the lubricating oil deterio­rates. Therefore, use a flux which does not
contain chlorine.

which does not contain chlorine (e.g. distilled
water or ion-exchange water).

Fig. 2-5-1 Prevention of oxidation during brazing

– 12 –

3-1. Indoor Unit

RAS-10JKCVP, RAS-13JKCVP

3. CONSTRUCTION VIEWS

Front panel

760

48

Knockout system

Indoor air suction port

Suction grille

48

Plasma air purifying unit

54.5

60

Air filter

Indoor heat exchanger

790 208

Air ionizer

54.5

60

790

Installation plate hanging section

607

48

Knockout system

48

46164

250

38

(Outside length: 0.54m)

19

(Minimum

distance to wall)

140 or more

2

Drain hose

Installation plate hanging section

10 10

7

Lower part
hanging
section

91 304 304

Hanging
section

Center line
of main unit

Center line of
installation plate

290

608 9191
450

288

(Minimum
distance to
ceiling)

67 or more

Outline of
installation plate

Auxiliary hose (Outside length: 0.45m)
Flare Ø6.35

Auxiliary hose (Outside length: 0.36m)
Flare Ø9.52

Stud bolt hole For Ø6

10 10

140 or more

Stud bolt hole For Ø8 to Ø10

(Minimum
distance to wall)

40

91

790

– 13 –

3-2. Outdoor Unit

RAS-10JACVP, RAS-13JACVP

Hanger

A leg part

310

296

(ø6 hole pitch)

(Anchor bolt long hole pitch)

B leg part

Ø4.5 embossing (Ø4STS used)
(For sunshade roof attaching)

14749,5

21

540

548

270

Fan guard

600

Ø25 drain hole

115

76

90

50

Ø11 x 17U-shape hole
(For Ø8-Ø10 anchor bolt)

8-Ø6 hole
(For fixing outdoor unit)

16

Ø11 x 17 long hole

(For Ø8-Ø10 anchor bolt)

115.5

Valve cover

Charging
port

157

59

21

54

Z

Connecting pipe port

(Pipe dia.Ø6.35)

Connecting pipe port

(Pipe dia.Ø9.52)

4 x Ø11 x 17U-shape hole
(For Ø8-Ø10 anchor bolt)

Intake

100 or

C

310

more

200 or more

8

Mounting dimensions of anchor bolt

600

50 or

more

D

Intake

Outside line
of product

Outlet

B

780 61

Z

view

A

250 or more

(Minimum distance
from wall)

4 x Ø11 × 17 long hole
(For Ø8-Ø10 anchor bolt)

332

Earth terminal

Detailed A leg part

50
36

11

310

296

R5.5

11

310

296

36
50

Detailed B leg part

600

2-Ø6 hole

2-Ø6 hole

600

R15

Outside line
of product

Outside line
of product

R15

R5.5

– 14 –

4-1. Outdoor Unit

RAS-10JACVP, RAS-13JACVP

Q200

IGBT MODULE

BLU

BZ

P17

COMPRESSOR

FAN MOTOR

FM

P18

P23

P22

P21

BLK

WHI

RED

33221

1

CM

CN300

RED

1

WHI

2

BLK

3

YEL

1

PNK

4

GRY

5

CN301

IGBT : Insulated Gate Bipolar Transistor

BYBXEWBWEVBVEU

P.C. BOARD

(MCC-813)

Q300

1
2
3

1
2
3
4
5

4-2. Indoor Unit

RAS-10JKCVP, RAS-13JKCVP

BLK

1 2 3 4
1 2 3 4

RED

BRW

BRW

BRW

1 2 3 4
1 2 3 4

CN33
(WHI)

2

2

9
8
7
6
5
4
3
2

MAIN P.C. BOARD

1

(MCC-891)

BLK
BLK

HEAT EXCHANGER

SENSOR (TC)

BLK
BLK

THERMO SENSOR

(TA)

CN100

(WHI)

BLU

1

1

BLU

2

2

BLU

3

3

BLU

4

4

BLU

5

5

BLU

6

6

BLU

7

7

BLU

8

8

Wireless Unit Assembly

MCC-900

WHI

9

9

CN01
(BLU)

121

CN03
(WHI)

121

CN13
(WHI)

9
8
7
6
5
4
3
2
1

4. WIRING DIAGRAM

DB01

CONVERTER
MODULE

BRW

BU

P19P20

P14

BLK

1
2
3
4
5
6

FUSE

F01

AC 250V

T3.15A

ELECTRONIC
ST ARTER

F04 FUSE
T3.15A

P13 P12 P11

PUR YEL

1
2
3
4
5

High-voltage

Power supply

6

Ion electrode

CN08

21 43

Air purifier

TNR

GEA

C12
C13
C14

Electrode

FILTER

ORN

POWER
RELA Y

INDOOR

TERMINAL

BLOCK

CN22

LINE

REACTOR

CT

P02
WHI

1

21

BLK WHI

3 1

CN23

DB01

221

1

P03
ORN

3

RED

CN500

121

2

P07P08P09P10

P06

SURGE
ABSORBER

VARISTOR

F01

FUSE

T25A

P01
BLK

NL32

POWER
SUPPLY
220-240V/50Hz
220V/60Hz

Heat

exchanger

GRN & YEL

CN21

CN34

DC5V

DC12V

POWER SUPPLY

THERMOSTAT
FOR
COMPRESSOR

CN601

TD

11
2 2
33

CN602

TO

121

2

CN603

TS

11
2 2
33

BLK

WHI

11

YEL

22

ORN

33

BLU

44
55
66

CN703

PMV

RED
GRY

Identification

RED
WHI
BLK
BLU
BRW
ORN
PUR
YEL
GRY
PNK
GRN&
YEL

BRW

121

2

RED

1

1

BLK

3

3

WHI

4

4

YEL

5

5

BLU

66

WHI

1

1

YEL

2

2

YEL

3

3

YEL

4

4

YEL

5

5

LOUVER MOTOR

BLU

(RED)

CN10
(WHI)

CN07
(WHI)

CIRCUIT

PULSE
MODULATING
VALVE

Color

RED

:

WHITE

:

BLACK

:

BLUE

:

BROWN

:

ORANGE

:

PURPUL

:

YELLOW

:

GRAY

:

PINK

:

GREEN&

:

YELLOW

Micro SW

FAN MOTOR

DC MOTOR

1

1

2

2

3

3

4

4

5

5

– 15 –

5. SPECIFICATIONS OF ELECTRICAL PARTS

5-1. Indoor Unit

RAS-10JKCVP, RAS-13JKCVP

No.

1

Fan motor (for indoor)

Room temp. sensor

2

(TA-sensor)

Heat exchanger temp. sensor

3

(TC-sensor)

4

Louver motor

Parts name

5-2. Outdoor Unit

RAS-10JACVP, RAS-13JACVP

No.

1

Reactor

2

Outside fan motor

Suction temp. sensor

3

(TS sensor)

Parts name

Type

MF-280-30-1

( – )

( – )

MP24GA

Model name

CH-57

ICF-140-43-1

(Inverter attached)

Specifications

DC280–340V, 30W

10kΩ at 25°C

10kΩ at 25°C

Output (Rated) 1W, 16poles, 1phase DC12V

Rating

L=10mH, 16A

DC140V, 43W

10kΩ (25°C)

Discharge temp. sensor

4

(TD sensor)

Outside air temp. sensor

5

(TO sensor)

6

Terminal block (6P)

7

Compressor

8

Compressor thermo.

9

Coil for PMV

(Inverter attached)

(Inverter attached)

——

DA91A1F-45F

US-622KXTMQO-SS

C12A

62kΩ (20°C)

10kΩ (25°C)

20A, AC250V

3-phases 4-poles 750W

OFF: 125 ± 4°C, ON: 90 ± 5° C

DC12V

– 16 –

6. REFRIGERANT CYCLE DIAGRAM

6-1. Refrigerant Cycle Diagram

RAS-10JKCVP/RAS-10JACVP
RAS-13JKCVP/RAS-13JACVP

P

Pressure measurement
Gauge attaching port

Vacuum pump connecting port
Deoxidized copper pipe

Outer dia. : 9.52mm
Thickness : 0.8mm

TS

TD

Muffler

INDOOR UNIT

Cross flow fan

Deoxidized copper pipe
Outer dia. : 6.35mm
Thickness : 0.8mm

Sectional shape
of heat insulator

Compressor
DA91A1F-45F

Outdoor heat

exchanger

Indoor heat

exchanger

TO

Split capillary

T1

Ø1.5 x 200

Temp. measurement

Allowable height

Strainer

Pulse modulating
valve at liquid side
(SEV16RC3)

Max. : 25m
Chargeless : 15m
Charge : 20g/m
(16 to 25m)

difference : 10m

Allowable pipe length

Temp. measurement

T2

Propeller fan

OUTDOOR UNIT

Ø1.5 x 200

NOTE :

Refrigerant amount : 0.9kg

Gas leak check position
Refrigerant flow (Cooling)

NOTE :

• The maximum pipe length of this air conditioner is 25 m. When the pipe length exceeds 15m, the additional
charging of refrigerant, 20g per 1m for the part of pipe exceeded 15m is required. (Max. 200g)

6-2. Operation Data

<Cooling>

Temperature

condition (°C)

Indoor Outdoor

27/19 35/–

Model

name
RAS-

10JKCVP
13JKCVP

Standard
pressure

P (MPa)

0.9 to 1.1

0.8 to 1.0

Heat exchanger

pipe temp.

T1 (°C) T2 (°C)

12 to 14 43 to 45
10 to 12 47 to 48

Indoor fan

mode

High
High

Outdoor fan

mode

High
High

Compressor

revolution

(rps)

45
70

NOTES :

(1) Measure surface temperature of heat exchanger pipe around center of heat exchanger path U bent.

(Thermistor themometer)

(2) Connecting piping condition : 5 m

– 17 –

7. CONTROL BLOCK DIAGRAM

7-1. Indoor Unit

RAS-10JKCVP, RAS-13JKCVP

Heat Exchanger Sensor(Tc)

Room Temperature Sensor(Ta)

Infrared Rays Signal Receiver

and Indication

Initializing Circuit

Clock Frequency

Oscillator Circuit

Power Supply

Circuit

Converter

(D.C circuit)

Noise Filter

M.C.U

Functions

• 3-minute Delay at Restart for Compressor

• Fan Motor Starting Control

• Processing

(Temperature Processing)

• Timer

• Serial Signal Communication

Serial Signal Transmitter/Receiver

Indoor Unit Control Unit

Louver

Motor

Louver Motor
Drive Control

Indoor Fan

Motor Control

Indoor

Fan Motor

Air purifier

unit

Micro Switch

From Outdoor Unit

220-240V/50Hz

220V/60Hz

REMOTE CONTROLLER

Serial Signal Communication

(Operation Command and Information)

Remote Controller

Operation (START/STOP)
Operation Mode Selection

AUTO, COOL, DRY, FAN only

Thermo. Setting

Fan Speed Selection

ON TIMER Setting

OFF TIMER Setting

Louver AUTO Swing

Louver Direction Setting

ECO

Hi-POWER

Infrared Rays, 36.7kHz

– 18 –

Air Purifier

SLEEP

For INDOOR UNIT

220–240 V/50Hz
220 V/60Hz

MICRO-COMPUTER BLOCK DIAGRAM

MCC813 (P.C.B) OUTDOOR UNIT

RAS-10JACVP, RAS-13JACVP

7-2. Outdoor Unit (In verter Assembly)

Indoor unit

send/receive

circuit

M.C.U

• PWM synthesis function

• Input current release control

Discharge

temp. sensor

Outdoor air

temp. sensor

– 19 –

Suction temp.

sensor

• IGBT over-current detect control

• Outdoor fan control

• High power factor correction control

• Inverter output frequency control

• A/D converter function

• P.M.V. control

• Discharge temp. control

• Signal communication to indoor unit

Clock

frequency

16MHz

Converter

(AC DC)

Noise

Filter

High Power

factor Correction

circuit

Input current

sensor

Driver circuit

of P.M.V.

Rotor position

detect circuit

Rotor position

detect circuit

Over current
detect circuit

Over current
detect circuit

Over current

Over current

sensor

sensor

Gate drive

circuit

Gate drive

circuit

Inverter

(DC

AC)

Inverter

(DC AC)

Outdoor

Fan motor

Compressor

P.M.V.

P.M.V : Pulse Modulating Valve
M.C.U : Micro Control Unit

8. OPERATION DESCRIPTION

8-1. Outline of Air Conditioner Control

This air conditioner is a capacity-variable type air
conditioner, which uses DC motor for the indoor fan
motor and the outdoor fan motor. And the capacity­proportional control compressor which can change
the motor speed in the range from 13 to 88 rps is
mounted. The DC motor drive circuit is mounted to
the indoor unit. The compressor and the inverter to
control fan motor are mounted to the outdoor unit.

The entire air conditioner is mainly controlled by the
indoor unit controller.

The indoor unit controller drives the indoor fan motor
based upon command sent from the remote control­ler, and transfers the operation command to the
outdoor unit controller.

The outdoor unit controller receives operation
command from the indoor unit side, and controls the
outdoor fan and the pulse modulating valve. (P.M.V)
Besides, detecting revolution position of the com­pressor motor, the outdoor unit controller controls
speed of the compressor motor by controlling output
voltage of the inverter and switching timing of the
supply power (current transf er timing) so that motors
drive according to the operation command.
And then, the outdoor unit controller transfers
reversely the operating status information of the
outdoor unit to control the indoor unit controller.

As the compressor adopts four -pole
brushless DC motor, the frequency of the
supply power from inverter to compressor is
two-times cyc les of the actual number of
revolution.

(1) Role of indoor unit controller

The indoor unit controller judges the operation
commands from the remote controller and
assumes the following functions .

• Judgment of suction air temperature of the
indoor heat exchanger by using the indoor
temp. sensor. (TA sensor)

• Judgment of the indoor heat exchanger tem­perature by using heat exchanger sensor (TC
sensor) (Prevent-freezing control, etc.)

• Louver motor control

• Indoor fan motor operation control

• LED (Light Emitting Diode) display control

• Transferring of operation command signal

(Serial signal) to the outdoor unit

• Reception of information of operation status
(Serial signal including outside temp. data) to
the outdoor unit and judgment/display of error

• Air purifier operation control

(2) Role of outdoor unit controller

Receiving the operation command signal (Serial
signal) from the indoor unit controller, the outdoor
unit performs its role.

• Compressor operation control

• Operation control of outdoor

fan motor

• P.M.V. control



Operations followed to
judgment of serial signal



from indoor side.



• Detection of inverter input current and current
release operation

• Over-current detection and prevention operation
to IGBT module (Compressor stop function)

• Compressor and outdoor fan stop function
when serial signal is off (when the serial signal
does not reach the board assembly of outdoor
control by trouble of the signal system)

• Transferring of operation information (Serial
signal) from outdoor unit controller to indoor
unit controller

• Detection of outdoor temperature and operation
rev olution control

(3) Contents of operation command signal (Serial

signal) from indoor unit controller to outdoor unit
controller

The following three types of signals are sent from
the indoor unit controller.

• Operation mode set on the remote control

• Compressor revolution command signal defined

by indoor temperature and set temperature
(Correction along with variation of room tem­perature and correction of indoor heat ex­changer temperature are added.)

• Temperature of indoor heat exchanger

• For these signals ([Operation mode] and

[Compressor rev olution] indoor heat exchanger
temperature), the outdoor unit controller
monitors the input current to the inverter , and
performs the follo wed operation within the
range that current does not exceed the allow­able value.

(4) Contents of operation command signal (Serial

signal) from outdoor unit controller to indoor unit
controller

The following signals are sent from the outdoor
unit controller.

• The current operation mode

• The current compressor revolution

• Outdoor temperature

• Existence of protective circuit operation

For transferring of these signals, the indoor unit
controller monitors the contents of signals, and
judges existence of trouble occurrence.

Contents of judgment are described below.

• Whether distinction of the current operation

status meets to the operation command signal

• Whether protective circuit operates

When no signal is received from the outdoor
unit controller, it is assumed as a trouble.

– 20 –

8-2. Operation Description

Item

1. Basic
operation

Operation flow and applicable data, etc.

1) Operation control
Receiving the user’s operation condition setup, the opera-

tion statuses of indoor/outdoor units are controlled.

Remote controller

Selection

of operation

conditions

ON/OFF

Signal

receiving

Indoor unit

control

Operation

command

Serial signal
send/receive

Control contents of remote controller

• ON/OFF (Air conditioner/Air purifier)

• Operation select

(AUTO/COOL/DRY/FAN ONLY)

• Temperature setup

• Air direction

• Swing

• Air volume select

(AUTO/LOW/LOW+/MED/MED+/HIGH)

• ECO

• ON timer setup

• OFF timer setup

• High power

Indoor unit

Indoor unit control

• Command signal generating
function of indoor unit operation

• Calculation function
(temperature calculation)

• Activation compensation
function of indoor fan

• Timer function

• Indoor heat exchanger

release control

Description

1) The operation conditions are
selected by the remote controller as
shown in the left.

2) A signal is sent by ON button of the
remote controller.

3) The signal is received by a sensor of
the indoor unit and processed by the
indoor controllers as shown in the
left.

4) The indoor controller controls the
indoor fan motor and louver motor.

5) The indoor controller sends the
operation command to the outdoor
controller, and sends/receives the
control status with a serial signal.

6) The outdoor controller controls the
operation as shown in the left, and
also controls the compressor,
outdoor fan motor, pulse modulating
valve.

• Indoor fan motor

• Louver motor

Outdoor unit

Serial signal
send/receive

Outdoor unit

control

Outdoor unit control

• Frequency control of inverter output

• Waveform composite function

• Calculation function

(Temperature calculation)

• AD conversion function

• Delay function of compressor reactivation

• Current release function

• GTr over-current preventive function

2) Cooling operation
The operations are performed in the following parts by

controls according to cooling conditions.

Operation ON

Indoor unit

control

Sending of

operation

command signal

Outdoor unit

control

Setup of remote controller

Indoor fan motor control
Louver control

Compressor revolution control
Outdoor fan motor control
Pulse modulating valve control

~

Inverter

1) Receiving the operation ON signal of

2) At the indoor unit side, the indoor fan

3) The outdoor unit controls the

• Compressor

• Outdoor fan motor

• Pulse modulating valve (PMV)

the remote controller, the cooling
operation signal starts being
transferred for m the indoor controller
to the outdoor unit.

is operated according to the con­tents of “2. Indoor fan motor control”
and the louver according to the
contents of “9. Louver control”,
respectively.

outdoor fan motor, compressor,
pulse modulating valve according to
the operation signal sent from the
indoor unit.

– 21 –

Item

Operation flow and applicable data, etc.

Description

1. Basic operation

3) AUTO operation
Selection of operation mode
As shown in the following figure, the operation starts by

selecting automatically the status of room temperature
(Ta) when starting AUTO operation.

Ta

Cooling operation

Ts + 1

Monitoring (Fan)

Ts

*1. When reselecting the operation mode, the fan speed is

controlled by the previous operation mode.

1) Detects the room temperature
(Ta) when the operation started.

2) Selects an operation mode from
Ta in the left figure.

3) Fan operation continues until an
operation mode is selected.

4) If the status of compressor-OFF
continues for 15 minutes the
room temperature after selecting
an operation mode, reselect an
operation mode.

4) DRY operation
DRY operation is perfor med according to the difference

between room temperature and the setup temperature as
shown below.

In DRY operation, fan speed is controlled in order to
prevent lowering of the room temperature and to avoid air
flow from blowing directly to persons.

[˚C]

Ta

L– (W5)

+

+

1.0

0.5

(W5+W3) / 2

SL (W3)

Tsc

Fan speed

1) Detects the room temperature
(Ta) when the DRY operation
started.

2) Starts operation under conditions
in the left figure according to the
temperature difference between
the room temperature and the
setup temperature (Tsc).
Setup temperature (Tsc) =
Set temperature on remote
controller (Ts) + (0.0 to 1.0)

3) When the room temperature is
lower 1°C or less than the setup
temperature, turn off the com­pressor.

– 22 –

Item

Operation flow and applicable data, etc.

Description

2. Indoor fan
motor control

<In cooling operation>

(This operation controls the fan speed at indoor unit side.)
The indoor fan (cross flow fan) is operated by the phase-

control induction motor. The fan rotates in 5 stages in
MANUAL mode, and in 5 stages in AUTO mode, respec­tively. (Table 1)

COOL ON

Fan speed setup

MANUAL

(Fig. 1)

AUTO

Indication Fan speed

L
L+
M
M+
H

W6

(L + M) / 2

W9

(M + H) / 2

WC

(Fig. 2)

Ta

[˚C]

+2.5
+2.0

+1.5
+1.0

+0.5

Tsc

a

b

c

d

e

Fan speed AUTO

M+(WB)

*3

*4

*5

L(W6)

*3 : Fan speed =

(M + –L) x 3/4 + L

*4 : Fan speed =

(M + –L) x 2/4 + L

*5 : Fan speed =

(M + –L) x 1/4 + L

(Linear approximation
from M+ and L)

* Symbols

UH : Ultra High
H : High
M+ : Medium+
M : Medium
L+ : Low+
L: Low
L- : Low–
UL : Ultra Low
SUL : Super Ultra Low

* The fan speed broadly varies due

to position of the louver, etc.
The described value indicates one
under condition of inclining
downward blowing.

1) When setting the fan speed to L,
L+, M, M+ or H on the remote
controller, the operation is
performed with the constant
speed shown in Fig. 1.

2) When setting the fan speed to
AUTO on the remote controller,
revolution of the fan motor is
controlled to the fan speed level
shown in Fig. 2 and Table 1
according to the setup tempera­ture, room temperature, and heat
exchanger temperature.

Fan speed

level

WF
WE
WD
WC
WB
WA

W9
W8
W7
W6
W5
W4
W3
W2
W1

COOL

UH

H

M+

M

L+

L

L–

UL

SUL

(Table 1) Indoor fan air flow rate

DRY

L+

L

L–

UL

SUL

Fan speed

(rpm)

1630
1480
1400
1350
1200
1110
980
830
810
810
780
700
550
400
400

Air flow rate

– 23 –

(m3/h)

684
609
569
544
468
423
358
283
273
273
257
217

142
67
67

RAS-13JKCVPRAS-10JKCVP

Fan speed

(rpm)

1650
1530
1440
1390
1240
1150
1010
860
810
810
780
700
550
400
400

Air flow rate

(m3/h)

694
634
589
564
488
443
373
298
273
273
257
217
142
67
67

Item

Operation flow and applicable data, etc.

Description

3. Outdoor fan
motor control

The blowing air volume at the outdoor unit side is controlled.
Receiving the operation command from the controller of

indoor unit, the controller of outdoor unit controls fan speed.
* For the fan motor, a DC motor with non-stage variable

speed system is used. However, it is limited to 8 stages for
reasons of controlling.

Air conditioner ON

(Remote controller)

Indoor unit controller

1) Outdoor unit
operation command
(Outdoor fan control)

2) Fan speed 400

when the motor stopped.

NO

Fan motor ON

3) Fan lock
NO

YES

YES

OFF status of

fan motor continues.

Air conditioner

OFF

Alarm

display

1) The operation command sent
from the remote controller is
processed by the indoor unit
controller and transferred to the
controller of the outdoor unit.

2) When strong wind blows at
outdoor side, the operation of air
conditioner continues with the
fan motor stopped.

3) Whether the fan is locked or not
is detected, and the operation of
air conditioner stops and an
alarm is displayed if the fan is
locked.

4) According to each operation
mode, by the conditions of
outdoor temperature(To) and
compressor revolution, the speed
of the outdoor fan shown in the
table is selected.

4) Motor operates as shown in the table below.

In cooling operation

Compressor speed (rps)

To

During

ECO mode

When To is abnormal

38˚C

To
To < 38˚C
To < 15˚C
To

38˚C
To < 38˚C
To < 15˚C

~13.8 ~34.7

f 7 f 4 f 3
f 7 f 5 f 4
f 8 f 8 f 8
f 7 f 5 f 4
f 7 f 7 f 5
f 8 f 8 f 8
f 5 f 5 f 4

Outdoor fan speed (rpm)

Tap

f 1
f 2
f 3
f 4
f 5
f 6
f 7
f 8

RAS-10JACVP

—
—

750
750
700
650
390
390

RAS-13JACVP

35.4~ MAX

—
—

840
840
700
650
390
390

– 24 –

Item

Operation flow and applicable data, etc.

Description

4. Capacity
control

The cooling capacity depending on the load is adjusted.
According to difference between the setup value of tempera-

ture and the room temperature, the capacity is adjusted by
the compressor revolution.

Remote controller Indoor unit

Set temp. (Ts) Room temp. (Ta)

Ts –Ta

Correction of Hz signal

Detection of electromotive force

of compressor motor winding

Detection of motor speed

and rotor position

Correction value of Hz

signal Operating Hz

Inverter output change

Commutation timing change

1) The difference between set
temperature on remote controller
(Ts) and room temperature (Ta)
is calculated.

2) According to the temperature
difference, the correction value of
Hz signal which determines the
compressor speed is set up.

3) The rotating position and speed
of the motor are detected by the
electromotive force occurred on
the motor winding with operation
of the compressor.

4) According to the difference
resulted from comparison of the
correction value of Hz signal with
the present operation Hz, the
inverter output and the commuta­tion timing are varied.

5) Change the compressor motor
speed by outputting power to the
compressor.

* The contents of control opera-

tion are same in cooling
operation and heating opera­tion

5. Current release
control

Change of compressor speed

This function prevents troubles on the electronic parts of the
compressor driving inverter.

This function also controls drive circuit of the compressor
speed so that electric power of the compressor drive circuit
does not exceed the specified value.

Outdoor unit inverter main

circuit control current

Operating current

Setup value

Low

Capacity control continues.

Outdoor temp.

45˚C
40˚C44˚C
16˚C39˚C
11˚C 15.5˚C

10.5˚C

High

Outdoor temp. To

Setup of current release point

Reduce compressor speed

Current decrease

Cooling current release value

5.62A

9.00A

1) The input current of the outdoor
unit is detected in the inverter
section of the outdoor unit.

2) According to the detected
outdoor temperature, the
specified value of the current is
selected.

3) Whether the current value
exceeds the specified value or
not is judged.

4) If the current value exceeds the
specified value, this function
reduces the compressor speed
and controls speed up to the
closest one commanded from the
indoor unit within the range
which does not exceed the
specified value.

– 25 –

Item

Operation flow and applicable data, etc.

Description

6. Release
protective
control by
temperature
of indoor heat
exchanger

7. Louver control

1) Louver
position

<In cooling/dry operation>

(Prevent-freezing control for indoor heat exchanger)
In cooling/dry operation, the sensor of indoor heat exchanger detects

evaporation temperature and controls the compressor speed so that
temperature of the heat exchanger does not exceed the specified
value.

Usual cooling capacity control

R

When the value is
in Q zone, the

Q

compressor speed
is kept.

P

Indoor heat exchanger temperature

7˚C

6˚C

5˚C

Reduction of compressor speed

This function controls the air direction of the indoor unit.

• The position is automatically controlled according to the operation
mode (COOL).

• The set louver position is stored in memory by the microcomputer,
and the louver returns to the stored position when the next opera­tion is performed. (Cooling memory position)

The angle of the louver is indicated as the horizontal angle is 0°.
When the louver closes fully, it directs approx. 49° upward.

1) When temperature of the
indoor heat exchanger
drops below 5°C, the
compressor speed is
reduced. (P zone)

2) When temperature of the
indoor heat exchanger
rises in the range from
6°C to under 7°C, the
compressor speed is
kept. (Q zone)

3) When temperature of the
indoor heat exchanger
rises to 7°C or higher, the
capacity control opera­tion returns to the usual
control in cooling
operation. (R zone)

2) Air direction
adjustment

1) Louver position in cooling operation

Cooling operation/

AUTO (COOL)/Dry

Initial setting of
“Cooling storage position”
Louver :
Directs downward (9˚)

Horizontal

blowing

Inclined
blowing

Room temp. (Ta) <

Set temp. (Tsc) + 3.5

Initial setting of
“Cooling storage position”
Louver :
Directs downward (9˚)

Air direction

Blowing

downward

Louver
angle

Powerful

Room temp. (Ta)

Set temp. (Tsc) + 3.5

“Inclined blowing”
Louver :
Directs downward (14˚)

Inclined

blowing

Horizontal
(0˚)

Horizontal

blowing

Cooling/AUTO

(COOL)/DRY

operation

Cooling
memory
position

YES NO

NO

YES

Inclined
blowing

Room temp.
Set temp. +3.5

Powerful

operation

YES

Room temp.

Set temp. +3.5

NO

Cooling

memory

position

• The louver position can be
arbitrarily set up by
pushing [FIX] button.

3) Swing

• Swing operation is performed in width 35° with the stop position as
the center.

• If the stop position exceeds either upper or lower limit position,
swing operation is perfor med in width 35° from the limit which the
stop position exceeded.

– 26 –

• Swing

When pushing [SWING]
button during operation,
the louver starts swinging.

Item

Operation flow and applicable data, etc.

Description

8. ECO
operation

When pushing [ECO] button on the remote controller, a quiet
and mild operation is performed by reducing the fan speed and
the compressor speed.

<Cooling operation>

This function operates the air conditioner with the difference
between the set and the room temperature as shown in the
following figure.

The time correction is performed for 8 minutes each. (However,
the first correction is performed 150 seconds after start of the
operation.)

Time correction

TA

[˚C]
+4.0
+3.5
+3.0
+2.5
+2.0
+1.5
+1.0
+0.5
TSC

–0.5
–1.0

–2.0

Zone

12
11
10

9
8
7
6
5
4
3
2
1

0

Frequency

DRY max

*12
*11
*10

*9
*8

COOL min

OFF

Fan

L+ (W7)

L (W6)

L– (W5)

UL (W4)

+ 1

± 0

–1 zone: min 1

<Cooling operation>

1) The room temperature (Tao) at
the start time of DRY operation is
detected.

2) According to difference between
the room temperature and the
set temperature (Tsc), the
operation starts with the condi­tions shown in the left figure.
Set temp.
(Tsc) = Set temp. on remote
controller (Ts) + (0.0 to 1.0)

3) If the room temperature is down
by 2°C or more, turn off the
compressor.

9. Temporary
operation

* 12 (DRY max - COOL min) /6 x 5 + COOL min
* 11 (DRY max - COOL min) /6 x 4 + COOL min
* 10 (DRY max - COOL min) /6 x 3 + COOL min

* 9 (DRY max - COOL min) /6 x 2 + COOL min
* 8 (DRY max - COOL min) /6 x 1 + COOL min

Pushing [RESET] button starts the temporary operation of
[AUTO] operation. When keeping [RESET] button pushed for 10
seconds or more, the temporary [COOL] operation is performed.

Filter lamp ON

NO

Did you push

[RESET] button for

3 seconds or more?

YES

Did you push

[RESET] button for

10 seconds or more?

NO

YES

NO

YES

Push RESET button.

Temporary
[AUTO] operation

1) When pushing [RESET] button,
the temporary [AUTO] operation
starts.

2) When keeping [RESET] button
pushed for 3 seconds or more,
Pi, Pi, Pi sound is heard and
[AUTO RESTART] control is
changed.

3) When keeping [RESET] button
pushed for 10 seconds or more,
“Pi” sound is heard and the
temporary [COOL] operation
starts.

4) If the filter lamp goes on, push
[RESET] button to go off the filter
lamp, and then push [RESET]
button again.

5) To stop the temporar y operation,
push the button again.

Switch to
[AUTO RESTART] control.

Temporary
[COOL] Operation

– 27 –

Item

Operation flow and applicable data, etc.

Description

10. Air purifying
control
[Detection of
abnormality]

This function notifies a trouble on the purifying operation.
The following items are judged as troubles (Filter lamp ON).
(1) 1000H counts of the timer were up.
(2) The panel switch was turned off by an operation such as

opening the front panel, etc.

(3) An abnor mal discharge due to adhesion of dirt, etc was

detected while the filter was turned on.

* For items (2) and (3), they are judged as troubles when

they continued for 1 second or more.

Purifying operation

YES

Filter lamp ON

Purifier power OFF

Total

operation time

1000H

NO

Error input [H]

YES

NO

The sequence that filter lamp is
turned on are described in the left
flowchart.

1) When 1000H timer counts up,
the filter lamp keeps lighting
even if the operation is stopped
by the remote controller.
The timer is stored in memory of
the microcomputer, and the
operation time is cleared by filter
RESETbutton, FILTER button on
the remote controller or a power
failure. (Filter lamp goes off.)

2) A trouble detected within 1
minute after activation of the air
is immediately judged as an error
and the filter lamp goes on.

3) In case that 1 minute passed
after activation of the purifier, the
purifier is turned off while the
lamp keeps ON. After 10 minutes
passed, restart the purifier and
an error is judged again.

NO

Purifier power ON
1 minute or less

YES

Filter lamp ON

Filter power OFF

1 2 3

Filter lamp-OFF

continues.

Purifier power OFF

Error detection

Approx. 10 minutes

passed.

YES

Purifier power ON

NO

1) Reset by RESET button.

2) Reset by RESET button or by the stop direction from the remote controller.
* When the breaker is turned [ON] (In restar t time after power failure) or RESET button is

pushed while the filter lamp is turned on, the air purifier is not turned on until the integrated
operation time of the indoor fan exceeds 1 hour after operation start (It is nor the air purifier
operation time).
It is the safety measures considering an incomplete drain when electric dust collector unit has
been cleaned with water.

– 28 –

Item

Operation flow and applicable data, etc.

Description

10. Air
purifying
control

This function generates nagative ion while cleaning the
air in the room.

If air purifier-ON signal is received while the air condi­tioner stops, the air purifier starts operation, and if it is
received while the air conditioner operates, the air
conditioner and the air purifier start operation.
The air ion generator operates linked with the air
purifying operation.

Sending air purifier-ON

1 2

Air conditioner stops Air conditioner operates

Operation lamp ON

Memory position

of louver/COOL

Fan ON

Air purifier ON

Air purifying operation

1,2

*1

*2

Start of air purifier-ON

Air conditioner +

air purifier operate

Present
status

Stop

Air purifier only

Air conditioner

Joint use of AC

and air purifier

Operation button

PAP button

Air purifier

Stop (All)

AC + Air purifier

AC operation

Air conditioner

AC operation*

AC + Air purifier

All stop

All stop

* When the previous operation was the

operation of air conditioner + air purifier,
an operation of air conditioner + air
purifier starts by pushing AC button on
the remote controller.
(Operation of air conditioner + air purifier
is stored in memory.)

Air purifying

operation

AC + Air purifying

operation

Louver*1

Cooling
position

Follows to

AC operation

Fan speed *2

AUTO, L, L+, M,

M+, H

Follows to

AC operation

*1 Swing is available
*2 Fan speed is Fan Auto mode varies in

order, (M + 1) → (L) → (L–) → (SL).

11. Discharge
tempera­ture control

Sending air purifier-OFF

3

4

3 4

Air purifier operates Air conditioner +

Operation lamp OFF Filter-OFF

Fan stop

Air purifier-OFF

Louver close

All stop

Td value

Judges as an error and stops the compressor.

117˚C

Reduce the compressor speed.

112˚C

Reduce slowly compressor speed.

108˚C

Keeps the compressor speed.

105˚C

If the operation is performed with lower speed
than one commanded by the serial signal, speed
is slowly raised up to the commanded speed.

98˚C

Operates with speed commanded by the serial
signal.

,

Air purifier operate

Air conditioner operates

Control operation

1. Purpose

This function detects error on the
refrigerating cycle or error on the
compressor, and perfor ms protective
control.

2. Operation

• Control of the compressor speed
The speed control is performed as
described in the left table based upon
the discharge temperature.

– 29 –

Item

Operation flow and applicable data, etc.

Description

12. Pulse
modulating
valve (PMV)
control

This function controls throttle amount of the refrigerant in
the refrigerating cycle.

According to operating status of the air conditioner, this
function also controls the open degree of valve with an
expansion valve with pulse motor.

Starting up

Initialize

Move to initial position

Compressor ON

SH control

PMV open degree control

Td

release control

1) When starting the operation, move
the valve once until it fits to the
stopper. (Initialize)

* In this time, “Click” sound may be

heard.

2) Adjust the open degree of valve by
super heat amount. (SH control)

3) If the discharge temperature was
excessively up, adjust the open
degree of valve so that it is in the
range of set temperature.
(Discharge temp. control)

4) To turn off the compressor while the
air conditioner stops by control of
the thermostat or by remote
controller, adjust the open degree of
valve to the setup value before stop
of the compressor.

13. Select
switch on
remote
controller

Stop by

remote controller

Power OFF

Room temp. sensor

(Ta sensor) control

* SH (Super Heat amount) =

Ts (Temperature of suction pipe of the compressor) –
Tc (Heat exchanger temperature at evaporation side)

* PMV: Pulse Modulating Valve

A remote controller operates only one indoor unit.
When two indoor units are installed in a room or in two

adjacent rooms, this function prevents that two indoor units
receive concurrently a signal from the remote controller as
only one unit is to be operated.

Push the operation button
on the remote controller.

Set [Remote controller
SELECT] switches of one of

Both indoor units

start operation.

NO

Unnecessary set

[Remote controller select]

YES

two indoor units and the
remote controller to [B].
(For details, refer to
“Installation Manual”.)

The indoor unit of which SELECT
switch on the remote controller is set
to B receives the signal sent from the
remote controller set to B.

(At shipment from the factory, SELECT
switch on the remote controller and
indoor unit is set to A. There is no
display of A setting.)

– 30 –

8-3. Auto Restart Function

This indoor unit is equipped with an automatic
restarting function which allows the unit to restart
operating with the set operating conditions in the
event of a power supply being accidentally shut
down. The operation will resume without warning
three minutes after power is restored.

This function is not set to work when shipped from
the factory. Therefore it is necessary to set it to
work.

• When the unit is standby (Not operating)

8-3-1. How to Set the Auto Restart Function

To set the auto restart function, proceed as follows:
The power supply to the unit must be on ; the

function will not set if the power is off.
Push the [RESET] button located in the center of the

front panel continuously for three seconds.
The unit receives the signal and beeps three times.
The unit then restarts operating automatically in the

event of power supply being accidentally shut down.

Operation

Push [RESET] button for more than
three seconds.

FILTER TIMER RESET OPERATION

RESET button

• When the unit is in operation

Operation

Push [RESET] button for more than
three seconds.

Motions

The unit is on standby.

↓

The unit starts to operate. The green lamp is on.

↓ After approx. three seconds,

The unit beeps three times The lamp changes from
and continues to operate. green to orange .

If the unit is not required to operate at this time, push [RESET] b utton
once more or use the remote controller to turn it off.

Motions

The unit is in operation. The green lamp is on.

↓

The unit stops operating. The green lamp is turned off.

FILTER TIMER RESET OPERATION

RESET button

The unit beeps three times.

If the unit is required to operate at this time, push [RESET] button
once more or use the remote controller to turn it on.

• While this function is being set, if the unit is in
operation, the orange lamp is on.

• This function can not be set if the timer operation
has been selected.

↓ After approx. three seconds,

• When the unit is turned on by this function, the
louver will not swing even though it was swinging
automatically before shutting down.

• While the filter check lamp is on, the RESET
button has the function of filter reset button.

– 31 –

8-3-2. How to Cancel the Auto Restart Function

To cancel auto restart function, proceed as follows :
Repeat the setting procedure : the unit receives the signal and beeps three times.
The unit will be required to be turned on with the remote controller after the main power supply is turned off.

• When the system is on stand-by (not operating)

Operation

Push [RESET] button for more than
three seconds.

FILTER TIMER RESET OPERATION

RESET button

• When the system is operating

Operation

Push [RESET] button for more than
three seconds.

Motions

The unit is on standby.

↓

The unit starts to operate. The orange lamp is on.

↓ After approx. three seconds,

The unit beeps three times The lamp changes from
and continues to operate. orange to green.

If the unit is not required to operate at this time, push [RESET] b utton
once more or use the remote controller to turn it off.

Motions

The unit is in operation. The orange lamp is on.

↓

The unit stops operating. The orange lamp is turned off.

↓ After approx. three seconds,

FILTER TIMER RESET OPERATION

RESET button

The unit beeps three times.

If the unit is required to operate at this time, push [RESET] button
once more or use the remote controller to turn it on.

• While this function is being set, if the unit is in operation, the orange lamp is on.

8-3-3. Power Failure During Timer Operation

When the unit is in timer operation, if it is turned off
because of power failure, the timer oper ation is
cancelled. Therefore, set the timer operation again.

NOTE :

The Everyday Timer is reset while a command
signal can be received from the remote controller
ev en if it stopped due to a power failure.

8-41. How to Turn Off Filter Check Lamp

Push [FILTER] button on the remote controller or
push [RESET] button on the indoor unit.

Then we have to clarify it.

NOTE :

If [RESET] button is pushed while the filter check
lamp is not indicating, the indoor unit will start the
automatic operation.

When you want a temporary operation while the filter

8-4. Filter Check Lamp

When the elapsed time reaches 1000 hours after air

lamp lights, put out the lamp once, and then push
the RESET button.

purifier operation, the filter lamp indicates.
After cleaning the filters, turn off the filter lamp.

– 32 –

8-5. Remote Controller and Its Fuctions

UTO

8-5-1. Parts Name of Remote Controller

1

Infrared signal emitter

Transmits signal to the indoor unit.

2

button

Push the button to start operation.
(A receiving beep is heard.)

Push the button again to stop operation.
(A receiving beep is heard.)

If no receiving sound is heard from the indoor unit,
push the button twice.

3

Mode select button (MODE)

Push this button to select a mode.
Each time you push the button, the modes cycle in

order from A : Auto changeover control,

: Dry, : Fan only and back to A.

(A receiving beep is heard.)

4

Temperature button (

.....The temperature setting is increased to 30°C.

.....The temperature setting is reduced to 17°C.

(A receiving beep is heard.)

5

Fan speed button (FAN)

Push this button to select the fan speed. When you
select AUTO, the fan speed is automatically adjusted
according to the room temperature.

You can also manually select the desired fan speed
from five available settings.
(LOW
HIGH

6

Auto louver button (SWING)

Push this button to swing the louv er.
(A receiving beep is heard.)

Push this button again to stop the louver from
swinging. (A receiving beep is heard.)

7

Set louver button (FIX)

Push this button again to adjust the air flow direction.
(A receiving beep is heard.)

8

ON timer button (ON)

Use this button to change the clock and ON timer
times.

To move up the time, push
To move down the time , push

button.

9

OFF timer button (OFF)

Use this button to change the OFF timer times.
To move up the time, push

To move down the time , push
button.

10

Reserve button (SET)

Push this button to store the time settings.
(A receiving beep is heard.)

11

Cancel button (CLR)

Push this button to cancel the ON timer and OFF
timer. (A receiving beep is heard.)

12

High power button (Hi POWER)

Push this button to start high power operation.

, LOW+ , MED , MED+ ,

) (A receiving beep is heard.)

TEMP

)

of the “ON ON” button.

of the “ON ON”

of the “OFF

of the “OFF

: Cool,

OFF

” button.

OFF

”

13

Memory button (MEMO)

Push this button to ready for storing the settings .
Hold down the button for more than 3 seconds to
store the setting indicated on the remote controller
and until the

14

Automatic operation button (AUTO)

Push this button to operate the air conditioner
automatically. (A receiving beep is heard.)

15

ECO timer button (ECO)

Push this button to operate the air conditioner
economically.

16

FILTER button

Push this button to turn off the filter cleaning indica­tor on the indoor unit.

Push this button after cleaning the air filter.

17

PRESET button

Push this button to operate the air conditioner to the
settings stored using the MEMO button.

18

Air purifying button (PAP)

Push this button to start the electrical air purifying
operation.

Push the button again to stop operation.

19

Sleep time button (SLEEP)

Push this button to start the sleep timer (OFF timer)
operation.

You can select the OFF timer time from among four
settings (1, 3, 5 or 9 hours).

mark is displayed.

P

1

AUTOA

AM

:

PM

ON

P

OFF

C

AM

:

AUTO

TEMP

PM

AUTO

PRESET

18

3

4

HiPOWER

CHK

PAP

MODE

15

12

7

6

11

Hi POWER

SWING

CLR

CLOCK
RESET

ECO

FIX FAN

ON

OFF

CHECK

MEMO

SLEEP

SET

FILTER

8

14

17

2

13

5

19

10

16

9

– 33 –

8-5-2. Name and Functions of Indications on Remote Controller

[Display]

All indications, except for the clock time indicator, are displayed by pushing the button.

6

1

Transmission mark

This transmission mark
remote controller transmits signals to the indoor
unit.

2

Mode display

Indicates the current operation mode.
(AUTO : Automatic control, A : Auto changeover
control,

3

T emperature display

Indicates the temperature setting (17°C to 30°C).

4

Air purifying indicator

Shows that the electrical air purifying operation is
in progress.

5

FAN speed display

Indicates the selected fan speed. AUTO or five
fan speed levels (LOW
MED

shown.
Indicates AUTO when the operating mode is

: D ry.

: Cool, : Dry, : Fan only)

, MED+ , HIGH ) can be

indicates when the

, LOW+ ,

TIMER and clock time display

The time setting for timer operation or the clock
time is indicated.

The current time is always indicated except during
TIMER operation.

7

Hi-POWER display

Indicates when the Hi-POWER operation starts.
Push the Hi POWER button to start and push it

again to stop the operation.

P

8

(MEMORY) displa y

Flashes for 3 seconds when the MEMO button is
pushed during operation.

P

The
button for more than 3 seconds while the mark is
flashing.

Push another button to turn off the mark.

9

ECO indicator

Indicates when the ECO is in activated.
Push the ECO button to start and push it again to

stop operation.

10

A, B change indicator remote controller

Push the CHECK point and Fix button at the same
time to change the remote controller setting from “A”
to “B”. (Priority is given to the “A” setting.)

The electric controller of the indoor unit is also
changed to the “B” setting.

mark is shown when holding down the

3

1

4

2

8

10

AUTOA

AM

:

PM

B

ON

P

OFF

C

AM

HiPOWER

AUTO

CHK

AUTO

95

76

• In the illustration, all indications are indicated for explanation.
During operation, only the relevant indications will be indicated on the remote controller.

˚

PM

:

AUTUTO

A

PM

OFF

:

– 34 –

8-6. Hi-POWER Mode

([Hi-PO WER] button on the remote
controller is pushed.)

When [Hi-POWER] button is pushed while the indoor
unit is in Auto or Cooling operation, Hi-POWER mark
is indicated on the display of the remote controller
and the unit operates as follo ws.

(1) Automatic operation

• The indoor unit operates in according to the
current operation.

(2) Cooling operation

• The preset temperature drops 1°C.
(The value of the preset temperature on the
remote controller does not change.)

• If the difference between the preset tempera­ture and the room temperature is big, the
horizontal louver moves to the Hi-POWER
position automatically. Then when the differ­ence between them gets smaller, the horizon­tal louver returns automatically.

(3) The Hi-POWER mode can not be set in Dry

operation

– 35 –

9. INSTALLATION PROCEDURE

9-1. Safety Cautions

For general public use

Power supply cord of outdoor unit shall be more than 1.5mm² (H07RN-F or 245IEC66) polychloroprene
sheathed flexible cord.

CAUTION

New Refrigerant Air Conditioner Installation

• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT
DESTROY OZONE LAYER.

R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane , and oils.
The working pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22. Accompanied with
adoption of the new refrigerant, the refrigeration machine oil has also been changed. Therefore, during
installation work, be sure that water, dust, former refrigerant, or refrigeration machine oil does not enter into
the new type refrigerant R410A air conditioner circuit.

To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging
port on main unit and installation tools are different from those for the conventional refrigerant units. Accord­ingly, special tools are required for the new refrigerant (R410A) units. For connecting pipes, use new and
clean piping materials with high pressure fittings made for R410A only, so that water and/or dust does not
enter. Moreover, do not use the existing piping because there are some problems with pressure fittings and
possible impurities in the existing piping.

CAUTION

TO DISCONNECT THE APPLIANCE FROM THE MAIN POWER SUPPLY

This appliance must be connected to the main power supply by a circuit breaker or a switch with a contact
separation of at least 3mm.

DANGER

• FOR USE BY QUALIFIED PERSONS ONLY.

• 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.

• CORRECTLY CONNECT THE CONNECTING CABLE. IF THE CONNECTING CABLE IS INCORRECTLY
CONNECTED, ELECTRIC PARTS MAY BE DAMAGED.

• CHECK THAT THE EARTH WIRE 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 THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE THE
UNIT WELL AWAY (MORE THAN 2M) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT REGISTORS,
FURNACE, STOVES, ETC.

• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLATION IN ANOTHER PLACE, BE VERY CAREFUL
NOT T O ALLOW THE SPECIFIED REFRIGERANT (R410A) TO BECOME MIXED WITH ANY OTHER GAS­EOUS BODY INTO THE REFRIGERATION CIRCUIT. IF AIR OR ANY OTHER GAS IS MIXED IN THE RE­FRIGERANT, THE GAS PRESSURE IN THE REFRIGERATION CIRCUIT WILL BECOME ABNORMALLY
HIGH AND IT MAY RESULT IN THE PIPE BURSTING AND POSSIBLE PERSONNEL INJURIES.

• 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, SUCH
AS BY FIRE, GENERATION OF POISONOUS GAS MAY RESULT.

– 36 –

WARNING

• Never modify this unit by removing any of the safety guards or by-pass any of the safety interlock
switches.

• Do not install in a place which cannot bear the weight of the unit. Personal injury and property damage
can result if the unit falls.

• Before doing any electrical work, attach an approved plug to the power supply cord and make sure the
equipment is grounded.

• Appliance shall be installed in accordance with national wiring regulations.
If you detect any damage, do not install the unit. Contact your Toshiba dealer immediately.

WARNING

• Exposure of unit to water or other moisture before installation may result in an electrical short. Do not
store in a wet basement or expose to rain or water.

• After unpacking the unit, examine it carefully for any 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 or discharged air might disturb neighbors.

• To avoid personal injury, be careful when handling parts with sharp edges.

• Please read the installation manual carefully before installing the unit. It contains further important

instructions necessary for proper installation.

– 37 –

9-1-1. Installation Diagram of Indoor and Outdoor Units

Before installing the wireless
remote controller

• With the remote controller
cover removed, correctly
load the figure, supplied
batteries while observing
their polarity.

2 Wireless

remote controller

Cover

3 Batteries

5 Zeolite-plus

filter

8 Flat head

wood screw

4 Remote controller holder

100 mm
or more from wall

2 Wireless remote controller

6 Zeolite-3G

filter

600 mm
or more

140 mm
or more

9 Dust collecting

unit

50 mm
or more
from wall

67 mm or more

Hook

Hook

1 Installation

plate

140 mm
or more

7 Mounting screw

Shield pipe

Saddle

Extension drain hose
(Option:RB-821SW)

For the rear left and left piping

Wall

Insert the cushion between
the indoor unit and wall, and
fit the indoor unit for better
installation work.

Do not allow the drain hose to
become slack.

Cut the piping
hole slightly
sloped.

Make sure the drain hose is
sloped downward.

The auxiliary piping can be
connected at the left, rear left,
rear right, right, bottom right or
bottom left as shown below.

Right

Rear
right

Bottom
right

Rear
left

Bottom left

Left

200 mm or more

As shown in the figure, position power cord and connecting
cable downward, and route it along piping connection port.

9-1-2. Optional Installation Parts

Part

code

A

B

C

Refrigerant piping
Liquid side : Ø6.35
Gas side : Ø9.52

Pipe insulating material
(Polyethylene foam, 6mm thick)

Putty, PVC tapes

Parts name

Q’ty

Each

one

1

Each

one

250 mm
or more from wall

Fig. 9-1-1

Fixing bolt arrangement of outdoor unit

• Secure the outdoor unit with
the attachment bolts and nuts
if the unit is likely to be
exposed to a strong wind.

• Use Ø8 mm or Ø10 mm
anchor bolts and nuts.

A

310

B

600

Insulate the refrigerant pipes
separately, not together.

6 mm thick heat resisting
polyethylene foam

B

Suction side

A

Diffuser

50

Fig. 9-1-2

– 38 –

9-1-3. Accessory and Installation Parts

Part No.

1

2

3

Others

Part name (Q'ty)

Installation plate x 1

Wireless
remote controller x 1

Battery x 2

Name

Owner’s manual

Installation manual

Part No.

Part name (Q'ty)

4

Remote controller holder x 1

5

Zeolite-plus filter x 1

6

Zeolite-3G filter x 1

Parts marked with asterisk (*) are packaged with the outdoor unit

This model is not equipped with an extention drain hose.

Option :

For the extention drain hose, use the optionally available RB-821SW or a
commercially available one.

Part No.

7

8

9

Part name (Q'ty)

Mounting screw
Ø4 x 25L x 6

Flat head wood screw
Ø3.1 x 16L x 2

Dust collecting unit

9-1-4. Installation/Servicing Tools

In the case of an air conditioner using R410A, in order to prevent any other refrigerant from being charged acciden­tally, the service port diameter of the outdoor unit control valve (3 way valve) has been changed.
(1/2 UNF 20 threads per inch)

• In order to increase the pressure resisting strength of the refrigerant piping flare processing diameter and size of
opposite side of flare nuts has been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)

New tools for R410A

New tools for R410A

Gauge manifold

Charge hose

Electronic balance
for refrigerant charging

Torque wrench
(nominal diam. 1/2, 5/8)

Flare tool (clutch type)
Gauge for projection

adjustment

Vacuum pump adapter

Applicable to R22 model

X
X

¡

X

¡

——

¡

Changes in the product and components

Changes

As pressure is high, it is impossible to measure by means of
conventional gauge. In order to prevent any other refrigerant from
being charged, each port diameter has been changed.

In order to increase pressure resisting strength, hose materials
and port size have been changed (to 1/2 UNF 20 threads per inch).
When purchasing a charge hose, be sure to confirm the port size.

As pressure is high and gasification speed is fast, it is difficult to
read the indicated value by means of charging cylinder, as air
bubbles occur.

The size of opposite sides of flare nuts have been increased.
Incidentally,
a common wrench is used for nominal diameters 1/4 and 3/8.

By increasing the clamp bar’s receiving hole, strength of spring in
the tool has been improved.

Used when flare is made by using conventional flare tool.
Connected to conventional vacuum pump. It is necessary to use

an adapter to prevent vacuum pump oil from flowing back to the
charge hose. The charge hose connecting part has two ports-one
for conventional refrigerant (7/16 UNF 20 threads per inch) and
one for R410A. If the vacuum pump oil (mineral) mixes with R410A
a sludge may occur and damage the equipment.

Gas leakage detector

• Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in the
U. S’s ARI specified rose color (ARI color code: PMS 507).

• Also, the “charge port and packing for refrigerant cylinder” require 1/2 UNF 20 threads per inch corresponding to
the charge hose’s port size.

X

Exclusive for HFC refrigerant.

– 39 –

9-2. Indoor Unit

9-2-1. Installation Place

• A place which provides the spaces around the indoor
unit as shown in the above diagram.

• A place where there is no obstacle near the air inlet
and outlet.

• A place which allows an easy installation of the
piping to the outdoor unit.

• A place which allows the front panel to be opened.

The indoor unit shall be installed as top of the indoor
unit comes to at least 2m height.

Also it must be avoided to put anything on the top of
the indoor unit.

Mounting the Installation Plate

For installation of the indoor unit, use the paper
pattern on the back.

Anchor bolt holes

91mm

1

91mm

Pipe hole

Thread

Indoor unit

Weight

Installation
plate

Pipe hole

CAUTION

• Direct sunlight to the indoor unit wireless
receiver should be avoided.

• The microprocessor in the indoor unit should not
be too close to r-f noise sources.
(For details, see the owner's manual.)

Remote controller

• A place where there are no obstacles such as a
curtain that may block the signal from the indoor unit.

• Do not install the remote controller in a place
exposed to direct sunlight or close to a heating
source, such as a stove.

• Keep the remote controller at least 1 m apart from
the nearest TV set or stereo equipment.
(This is necessary to prevent image disturbances or
noise interference.)

• The location of the remote controller should be
determined as shown below.

(Side view)

7m

Indoor unit

75˚

Reception
range

9-2-2. Cutting a Hole and Mounting

Installation Plate

Cutting a Hole

When install the refrigerant pipes from the rear.

(Top view)

Remote

controller

Fig. 9-2-1

Indoor unit

Reception
range

: Axial distance

*

5m

5m

˚

45

˚

45

Remote
controller

7m

*

Fig. 9-2-3

When the installation plate is directly mounted
on the wall

1. Securely fit the installation plate onto the wall by
screwing it in the upper and lower parts to hook up
the indoor unit.

2. To mount the installation plate on a concrete wall
with anchor bolts, utilize the anchor bolt holes as
illustrated in the above figure.

3. Install the installation plate horizontally in the wall.

CAUTION

When installing the installation plate with mounting
screw, do not use the anchor bolt hole. Otherwise
the unit may fall down and result in personal injur y
and property damage.

Anchor bolt

Projection
15mm or less

Fig. 9-2-4

5 mm dia. hole

7 Mounting screw
Ø4 x 25

Clip anchor
(local parts)

Fig. 9-2-5

Pipe hole

The center of the pipe
hole is above the arrow.

Ø65mm

100mm

Fig. 9-2-2

1. After determining the pipe hole position on the
mounting plate (

), drill the pipe hole (Ø65 mm) at

a slight downward slant to the outdoor side.

NOTE :

• When drilling the wall that contains a metal lath, wire

lath or metal plate, be sure to use a pipe hole brim
ring sold separately.

– 40 –

CAUTION

Failure to firmly install the unit may result in personal
injury and property damage if the unit falls.

• In case of block, brick, concrete or similar type
walls, make 5 mm dia. holes in the wall.

• Insert clip anchors for appropriate
screws.

NOTE :

• Install the installation plate using 4 to 6 pieces of
mounting screw securing four corners with screws.

mounting



9-2-3. Electrical Work

Die-cutting

Front panel slit

Changing

drain hose

Piping preparation

Rear right
Rear left
Bottom left
Left
Bottom right
Right

Terminal cover

Terminal block

Screw

Screw

Connecting cable

Connecting
cable

Earth wire

Cord clamp

Screw

about 15 cm

1

2

3

8

1. The supply voltage must be the same as the rated
voltage of the air conditioner.

2. Prepare the power source for exclusive use with the
air conditioner.

NOTE :

• Wire type : More than H07RN-F or 245IEC66

(1.0mm² or more)

CAUTION

• This appliance can be connected to the mains in
either of the following two ways.

(1) Connection to fixed wiring :

A switch or circuit breaker which disconnects
all poles and has a contact separation of at
least 3 mm must be incorporate in the fixed
wiring.
An approved circuit breaker or switches must
be used.

(2) Connection with power supply plug :

Attach power supply plug with power cord
and plug it into wall outlet. An approved
power supply cord and plug must be used.

Fig. 9-2-6

Earth line

132

NOTE : WIRE TYPE : more than H07 RN-F or

245 IEC 66. (1.0mm² or more)

Fig. 9-2-7 Stripping length of connecting cable

9-2-5. Piping and Drain Hose Installation

NOTE :

• Perform wiring wor ks so as to allow a generous
wiring capacity.

9-2-4. Wiring Connection

How to connect the connecting cable

Wiring of the connecting cable can be carried out
without removing the front panel.

1. Remove the air inlet grille.

Open the air inlet grille upward and pull it toward
you.

2. Remove the terminal cover and cord clamp.

3. Insert the connecting cable (according to the local

cords) into the pipe hole on the wall.

4. Take out the connecting cable through the cable slot

on the rear panel so that it protrudes about 15cm
from the front.

5. Insert the connecting cable fully into the ter minal

block and secure it tightly with screws.

6. Tightening torque : 1.2 N•m (0.12 kgf•cm)

7. Secure the connecting cable with the cord clamp.

8. Fix the terminal cover, rear plate bushing and air

inlet grille on the indoor unit.

CAUTION

• Be sure to refer to the wiring system diagram
labeled inside the front panel.

• Check local electrical requlations for any specific
wiring instructions or limitations.

Piping and drain hose forming

• Since condensation results in a machine trouble,
make sure to insulate both the connecting pipes
separately.
(Use polyethylene foam as insulating material.)

Fig. 9-2-8

1. Die-cutting front panel slit

Cut out the slit on the left or right side of the front
panel for the left or right connection and the slit on
the bottom left or right side of the front panel for the
bottom left or right connection with a pair of nippers.

2. Changing drain hose

For left connection, left bottom connection and rear
left connection’s piping, it is necessary to change
the drain hose and drain cap.

How to remove the Drain Cap

Clip drain cap by needle-nose plier, and pull out.

Fig. 9-2-9

– 41 –

How to install the Drain Cap

Firmly inser t drain hose connecting part unit hitting on
a heat insulator.

Heat insulator

Left-hand connection with piping

Bend the connecting pipe so that it is laid within 43mm
above the wall surface. If the connecting pipe is laid
exceeding 43mm above the wall surface, the indoor
unit may unstably be set on the wall. When bending
the connecting pipe, make sure to use a spring bender
so as not to crush the pipe.

Drain hose

Fig. 9-2-10

How to fix the Drain Cap

1) Insert hexagonal wrench (Ø4mm) in a center head.

Ø4mm

Fig. 9-2-11

2) Firmly insert drain cap.

No gap

Do not apply lubricating oil
(refrigerant machine oil)
when inserting the drain cap.
If applied, deterioration and

Insert a hexagon
wrench (Ø4mm)

drain leakage of the drain
plug may occur.

Fig. 9-2-12

Bend the connection pipe within a radius of
30mm (Ø6.35), 40mm (Ø9.52).

To connect the pipe after installation of the unit (figure)

(To the forefront of flare)

Outward form
of indoor unit

43mm

270mm

170mm

R 30mm or less (Ø6.35), R 40mm or less (Ø9.52)
(Use polisin (polyethylene core)
or the like for bending pipe.)

˚

80

Liquid side

Gas side

Use the handle of screwdriver,etc.

Fig. 9-2-15

NOTE :

If the pipe is bent incorrectly, the indoor unit may
unstably be set on the wall.

After passing the connecting pipe through the pipe
hole,connect the connecting pipe to the auxiliary pipes
and wrap the facing tape around them.

CAUTION

Firmly insert the drain hose and drain cap :
otherwise, water may leak.

In case of right or left piping

• After scribing slits of the front panel with a knife or a
making-off pin, cut them with a pair of nippers or an
equivalent tool.

Slit

Fig. 9-2-13

In case of bottom right or bottom left piping

• After scribing slits of the front panel with a knife or a
marking-off pin, cut them with a pair of nippers or an
equivalent tool.

Slit

Fig. 9-2-14

CAUTION

• Bind the auxiliar y pipes (two)and connecting
cable with facing tape tightly.In case of leftward
piping and rear-leftward piping,bind the auxiliary
pipes (two)only with facing tape.

Indoor unit

Auxiliary pipes

Installation plate

Fig. 9-2-16

• Carefully arrange pipes so that any pipe does
not stick out of the rear plate of the indoor unit.

• Carefully connect the auxiliar y pipes and con­necting pipes to each other and cut off the
insulating tape wound on the connecting pipe to
avoid double-taping at the joint,moreover,seal
the joint with the vinyl tape,etc.

• Since condensation can results in machine
performance trouble, be sure to insulate both
connecting pipes.(Use polyethylene foam as
insulating material.)

• When bending a pipe,carefully do it not to crush it.

Connecting cable

– 42 –

9-2-6. Indoor Unit Installation

1. Pass the pipe through the hole in the wall, and hook
the indoor unit on the installation plate at the upper
hooks.

2. Swing the indoor unit to right and left to confirm that
it is firmly hooked up on the installation plate.

3. While pressing the indoor unit onto the wall, hook it
at the lower part on the installation plate. Pull the
indoor unit toward you to confirm that it is firmly
hooked up on the installation plate.

1

2

Hook

Hook here
1

Installation
plate

Push (unhook)

Fig. 9-2-17

• For detaching the indoor unit from the installation

plate, pull the indoor unit toward you while pushing
its bottom up at the specified parts.

PushPush

Fig. 9-2-18

8-2-7. Drainage

1. Run the drain hose sloped downwards.

NOTE :

• Hole should be made at a slight downward slant on

the outdoor side.

Do not rise the drain hose.

50 mm
or more

Do not put the
drain hose end
into water.

Fig. 9-2-19

2. Put water in the drain pan and make sure that the
water is being drained outside.

3. When connecting extension drain hose, insulate the
connecting part of extension drain hose with shield
pipe.

Drain hose

Shield pipe

Inside the room

Fig. 9-2-20

Do not form the drain hose
into the waved shape.

Do not put the drain
hose end in the
drainage ditch.

Extension drain hose

9-3. Outdoor Unit

9-3-1. Installation Place

• A place which provides the spaces around the outdoor
unit as shown in the left diagram.

• A place which can bear the weight of the outdoor unit and
does not allow an increase in noise level and vibration.

• A place where the operation noise and discharged air
do not disturb users neighbors.

• A place which is not exposed to a strong wind.

• A place free of a leakage of combustible gases.

• A place which does not block a passage.

• When the outdoor unit is to be installed in an elevated

position,be sure to secure its feet.

• This air conditioner accepts a connection piping length
of up to 25 m.

• There is no need to add refrigerant as long as the

length of the connection piping is 15 m or less.

• You will need to add 20g of refrigerant per meter of

added connnection piping for installations requiring
connection piping to be between 16 m to 25 m.

• An allowable height level is up to 10 m.

• A place where the drain water does not raise any

problem.

Precautions for adding refrigerant

• Use a scale having a precision with at least 10 g per
index line when adding the refrigerant. Do not use a
bathroom scale or similar instrument.

• Use liquid refrigerant when refilling the refrigerant.
Since the refrigerant is in liquid form, it can fill quickly.
Therefore, perform the filling operation carefully and
insert the refrigerant gradually.

CAUTION

1. Install the outdoor unit without anything blocking
the air discharging.

2. When the outdoor unit is installed in a place
exposed always to a strong wind like a coast or on
a high storey of a building,secure the normal fan
operation using a duct or a wind shield.

3. Specially in windy areas, install the unit prevent
the admission of wind.

4. Installation in the following places may result in
trouble. Do not install the unit in such places.

• A place full of machine oil.

• A saline-place such as the coast.

• A place full of sulfide gas.

• A place where high-frequency

waves are likely to be generated
as from audio equipment,
welders, and medical
equipment.

Fig. 9-3-1

Strong
wind

CAUTION

Install the drain pipe for proper drainage.
Improper drainage can result in water dripping
inside the room.

This air conditioner has been
designed to drain water
collected from condensation
which forms on the back of the
indoor unit, to the drain pan.
Therefore, do not locate the
power cord and other parts at a
height above the drain guide.

Space for
pipes

Fig. 9-2-21

Wall

Drain
guide

9-3-2. Refrigerant Piping Connection

Flaring

1. Cut the pipe with a pipe cutter.

90˚

Obliquity Roughness Warp

Fig. 9-3-2

– 43 –

2. Insert a flare nut into the pipe, and flare the pipe.

• Projection margin in flaring : A (Unit : mm)

Rigid (Clutch type)

Outer dia. of

copper pipe

6.35

9.52

Die Pipe

Fig. 9-3-3

R410A

tool used

0 to 0.5
0 to 0.5

Imperial (Wing nut type)

A

Outer dia. of
copper pipe

6.35

9.52

Conventional

tool used

1.0 to 1.5

1.0 to 1.5

R410A

1.5 to 2.0

1.5 to 2.0

Tightening Connection

Align the centers of the connecting pipes and tighten
the flare nut as far as possible with your fingers. Then
tighten the nut with a spanner and torque wrench as
shown in the figure.

Half union

Externally
threaded side

Use a wrench
to secure.

Flare nut

Internally
threaded side

Use a torque wrench
to secure.

Fig. 9-3-4

CAUTION

• Do not apply excess torque. Otherwise the nut
may crack depending on the conditions.

(Unit : N·m)

Outer dia. of copper pipe

Ø6.35 mm
Ø9.52 mm

• Tightening torque for connection of flare pipe

The pressure of R410A is higher than R22.
(Approx. 1.6 times) Therefore
securely tighten the flare pipes
which connect the outdoor unit
and the indoor unit with the
specified tightening torque using
a torque wrench.
If each flare pipe connects
incorrectly, it may cause not only
a gas leakage but also a trouble
of the refrigeration cycle.

Tightening torque

14 to 18 (1.4 to 1.8 kgf•m)
33 to 42 (3.3 to 4.2 kgf•m)

Flare at
indoor
unit side

Flare at
outdoor
unit side

Fig. 9-3-5

9-3-3. Evacuating

After the piping has been connected to the indoor unit,
you can perform the air purge together at once.

AIR PURGE

Evacuate the air in the connecting pipes and in the
indoor unit using vacuum pump. Do not use the
refrigerant in the outdoor unit. For details, see the
manual of vacuum pump.

Use a vacuum pump

Be sure to use a vacuum pump with counter-flow
prevention function so that oil inside the pump does
not flow back into the air conditioner pipes when the
pump stops. (If oil inside the vacuum pump enters into
the air conditioner circuit which uses R410A, trouble
with the refrigeration system may occur.)

1. Connect the charge hose from the manifold valve to
the service port of the gas side packed valve.

2. Connect the charge hose to the port of vacuum pump.

3. Open fully the low pressure side handle of the
gauge manifold valve.

4. Operate the vacuum pump to start for evacuating.
Perform evacuating for about 15 minutes if the
piping length is 20 meters. (15 minutes for 20
meters) (assuming a pump capacity of 27 liters per
minute.) Then confirm that the compound pressure
gauge reading is –101 kPa ( –76 cmHg).

5. Close the low pressure side valve handle of gauge
manifold.

6. Open fully the valve
stem of the packed
valves (both side
of Gas and Liquid).

7. Remove the
charging hose from
the service port.

8. Securely tighten
the caps on the
packed valves.

Fig. 9-3-7

Compound
pressure
gauge

-101kPa
(-76cmHg)

Handle Lo

Charge hose
(For R410A only)

Connecting
pipe

Pressure gauge

Manifold valve

Handle Hi
(Keep full closed)

Charge hose
(For R410A only)

Vacuum pump
adapter for
counter-flow
prevention
(For R410A only)

Vacuum
pump

Packed valve at liquid side

Packed valve at gas side
Service port
(Valve core (Setting pin))

CAUTION

• IMPORT ANT POINTS FOR PIPING WORK

1. Keep dust and moisture away from entering the
pipes.

2. Tight connection (between pipes and unit)

3. Evacuate the air in the connecting pipes using
VACUUM PUMP.

4. Check gas leak (connected points)

Shaping pipes

1. How to shape the pipes
Shape the pipes along the incused line on the

outdoor unit.

2. How to fit position of the
pipes

85mm

Put the edges of the pipes
to the place with a
distance of 85mm from
the incused line.

Fig. 9-3-6

Incused
line

Packed Valve Handling Precautions

• Open the valve stem all the way out :
but do not try to open it beyond the stopper.

• Securely tighten the valve stem cap with torque in
the following table :

Gas side
(Ø9.52 mm)

Liquid side
(Ø6.35 mm)

Service port

33 to 42 N•m
(3.3 to 4.2 kgf•m)

14 to 18 N•m
(1.4 to 1.8 kgf•m)

14 to 18 N•m
(1.4 to 1.8 kgf•m)

– 44 –

Hexagonal
wrench is
required.

4mm

Fig. 9-3-8

9-3-4. Wiring Connection

1. Remove the electric parts cover from the outdoor unit.

2. Connect the connecting cable to the terminal as
identified with their respective matched numbers on
the terminal block of indoor and outdoor unit.

3. When connecting the connecting cable to the
outdoor unit terminal, make a loop as shown
installation diagram of indoor and outdoor unit, to
prevent water coming in the outdoor unit.

4. Insulate the unused cords (conductors) with water
coming in the outdoor unit. Process them so that
they do not touch any electrical or metal parts.

9-3-5. Gas Leak Test

Check places for
flare nut connections
(indoor unit)

Electric parts

Valve cover

Stripping length of connecting cable

Connecting
cable

Terminal block

Power
cord

10

123

10

40

30

Earth line

Connecting cable

Fig. 9-3-9

Model

Power source
Maximum running current
Power cord

Connection cable

RAS-10JKCVP RAS-13JKCVP

220 – 240 V~, 50 Hz

220 V~, 60 Hz
10A 11A
H07RN-F or 245IEC66

(1.5 mm² or more)

Wire type: More than

H07RN-F or 245IEC66

(1.0 mm² or more)

Check places
for outdoor unit

10

LN

10

• Check the flare nut connections for the gas leak with
a gas leak detector or soap water.

Power
cord

40

30

Fig. 9-3-10

9-3-6. Test Operation

To test the system, push and hold RESET button for
10 sec. (A short beep will be heard.)

FILTER TIMER RESET OPERATION

RESET button

CAUTION

• Wrong wiring connection may cause some
electrical parts bur n out.

• Be sure to comply with local requlations/codes
when running the wire from outdoor unit to
indoor unit. (Size of wire and wir ing method etc.)

• Every wire must be connected firmly.

• If incorrect or incomplete wiring is carried out, it

will cause an ignition or smoke.

• Prepare the power supply for exclusive use with
the air conditioner.

• This product can be connected to the main
breaker.

Connection to fixed wiring : A switch which

disconnects all poles and has a contact separa­tion of at least 3 mm must be incorporated in the
fixed wiring when connecting to a main breaker
circuit.

NOTE: Connecting cable

• Wire type : More than H07RN-F or 245IEC66
(1.0mm² or more)

Fig. 9-3-11

– 45 –

9-3-7. Auto Restart Setting

This product is designed so that, after a power failure,
it can restart automatically in the same operating
mode as before the power failure.

Information

The product was shipped with Auto Restart
function in the off position.
Turn it on as required.

How to Set the Auto Restart

• Push and hold the RESET button for about 3 sec­onds. After 3 seconds, three shor t electronic beeps
will be heard to inform you that the Auto Restart has
been selected.

• To cancel the Auto Restart, follow the steps de­scribed in the section Auto Restart Function of the
Owner’s Manual.

Setting of Remote Controller Selector Switch

Remote controller selector switch

• If two indoor units are installed in the same room or
adjoining rooms, the second unit can inadvertently
receive a remote controller signal and start operation
when operating the first unit. This can be prevented
by setting one of the indoor units and the corre­sponding remote controller to the B setting (the A
setting is the default setting).

1. Setting the remote controller switch on the main

unit

• Remove the front panel, and then set the
selector switch to “B”.

• After setting of the switch, remount the front
panel.

2. Setting the remote controller switch on the remote
controller

• Insert dry-cell batteries, and push the RESET

button.

• While holding down the CHECK button with a

pointed object, push the FIX button so that “B” is
displayed at the right of the temperature indica­tor.

3. Check that the indoor unit can be operated by the
modified remote controller.

Position of remote controller selector switch

A
B

Fig. 9-3-12

– 46 –

10. HOW TO DIAGNOSE THE TROUBLE

The pulse modulating circuits are mounted to both
indoor and outdoor units. Therefore, diagnose
troubles according to the trouble diagnosis proce­dure as described below. (Refer to the check points
in servicing written on the wiring diagrams attached
to the indoor/outdoor units.)

Table 10-1

No.

1
2
3
4
5
6

Troubleshooting Procedure

First Confirmation
Primary Judgment
Judgment by Flashing LED of Indoor Unit
Self-Diagnosis by Remote Controller
Judgment of Trouble by Every Symptom
How to Check Simply the Main Parts

Page

47
48
49
50
53
62

NOTE :

A large-capacity electrolytic capacitor is used in the
outdoor unit controller (inverter). Therefore, if the
power supply is turned off, charge (charging voltage
DC280 to 380V) remains and discharging takes a lot
of time. After turning off the power source, if touch­ing the charging section before discharging, an
electrical shock may be caused. Discharge the
electrolytic capacitor completely by using soldering
iron, etc.

< Discharging method >

(1) Remove the inverter cover (plating) by opening

four mounting claws .

(2) As shown below, connect the discharge resis-

tance (approx. 100Ω40W) or plug of the solder­ing iron to voltage between + – terminals of the
C14 (“CAUTION HIGH VOLTAGE” is indicated.)
electrolytic capacitor (500µF/400V) on P.C.
board, and then perform discharging.

Inverter cover

10-1. First Confirmation

10-1-1. Confirmation of Power Supply

Confirm that the power breaker operates (ON)
normally.

Discharging position
(Discharging period
10 seconds or more)

Fig. 10-1

10-1-2. Confirmation of Power Voltage

Confirm that power voltage is 50Hz, AC 220–230–
240 ± 10% or 60Hz, AC 220 ± 10%. If power
voltage is not in this range, the unit may not operate
normally.

Plug of
soldering iron

P. C . board
(Soldered surface)

– 47 –

10-1-3. Operation Which is not a Trouble (Program Operation)

For controlling the air conditioner, the program operations are built in the microcomputer as described in the
following table. If a claim is made for running operation, check whether or not it meets to the contents in the
following tab le. When it does, we inform you that it is not trouble of equipment, but it is indispensable for control­ling and maintaining of air conditioner.

Table 10-1-1

No.

1

When power breaker is turned “ON”, the
operation lamp (Green) of the indoor unit
flashes.

2

Compressor may not operate even if the
room temperature is within range of
compressor-ON.

3

In Dry and ECO mode, FAN (air flow)
display does not change even though FAN
(air flow select) button is operated.

4

Increasing of compressor motor speed
stops approx. 30 seconds after operation
started, and then compressor motor speed
increases again approx. 30 seconds after.

Operation of air conditioner

Description

The OPERATION lamp of the indoor unit flashes when
power source is turned on. If [START/STOP] button is
operated once, flashing stops. (Flashes also in power
failure)

The compressor does not operate while compressor
restart delay timer (3-minutes timer) operates.
The same phenomenon is found after power source has
been turned on because 3-minutes timer operates.

The air flow indication is fixed to [AUTO].

For smooth operation of the compressor, the compres­sor motor speed is restricted to Max. 41 rps for 2 min­utes, after the operation has started.

5

In AUTO mode, the operation mode is
changed.

After selecting Cool mode, select an operation mode
again if the compressor keeps stop status for 15 min­utes.

10-2. Primary Judgment

To diagnose the troubles, use the following methods.
(1) Judgment by flashing LED of indoor unit
(2) Self-diagnosis by service check remote controller
(3) Judgment of trouble by every symptom

Firstly use the method (1) for diagnosis. Then, use the method (2) or (3) to diagnose the details of troubles.

– 48 –

10-3. Judgment by Flashing LED of Indoor Unit

While the indoor unit monitors the operation status of the air conditioner, if the protective circuit operates, the
contents of self-diagnosis are displayed with block on the indoor unit indication section.

Table 10-3-1

Indoor indication

lamp flashes.

Which lamp

does flash?

Item

A

B

C

D

E

Check

code

Block display Description for self-diagnosis

OPERATION (Green)
Flashing display (1 Hz)

OPERATION (Green)
Flashing display (5 Hz)

OPERATION (Green)
TIMER (Yellow)
Flashing display (5 Hz)

OPERATION (Green)
FILTER (Orange)
Flashing display (5 Hz)

OPERATION (Green)
TIMER (Yellow)
FILTER (Orange)
Flashing display (5 Hz)

Power failure (when power is ON)

Protective circuit operation for indoor P.C. board

Protective circuit operation for connecting cable
and serial signal system

Protective circuit operation for outdoor P.C. board

Protective circuit operation for others
(including compressor)

NOTES :

(1) The contents of items B and C and a part of item E are displayed when air conditioner operates.
(2) When item B and C, and item B and a part of item E occur concurrently, priority is given to the block of item B .
(3) The check codes can be confirmed on the remote controller for servicing.

– 49 –

UT

10-4. Self-Diagnosis by Remote Controller (Check Code)

(1) If the lamps are indicated as shown B to E in Table 10-3-1, excute the self-diagnosis by the remote controller.
(2) When the remote controller is set to the service mode, the indoor controller diagnoses the operation condi-

tion and indicate the information of the self-diagnosis on the display of the remote controller with the check
codes. If a fault is detected, all lamps on the indoor unit will flash at 5Hz and it will beep for 10 seconds
(Pi, Pi, Pi ... ). The timer lamp usually flashes (5Hz) during self-diagnosis.

10-4-1. How to Use Remote Controller in Service Mode

1

Push [CHECK] button with a tip of pencil to set the
remote controller to the service mode.

•“ ” is indicated on the display of the remote
controller.

• The timer lamp of the indoor unit flashes continuously.
(5 times per 1 sec.)

Push [ON ] or [OFF ] button

2

If there is no fault with a code, the indoor unit will beep
once (Pi) and the display of the remote controller will
change as follows :

• • •

HiPOWER

CHK

AUTOA

O

AUT

AM

:

PM

ON

P

OFF

C

AM

˚

:

PM

PAP

MODE

Hi POWER
SWING

FIX FAN

CLR

ON

CLOCK
RESET

CHECK

TEMP

ECO

PRESET

OFF

AUTO

MEMO

SLEEP

SET

FILTER

Alphanumeric characters are
used for the check codes.

is 5. is 6.
is A. is B.
is C. is D.

• Check the unit with all 52 check codes ( to )
as shown in Table-10-4-1.

• Push [ON ] or [OFF ] button to change the check
code backward.

If there is a fault, the indoor unit will beep for 10
seconds (Pi, Pi, Pi...).

Note the check code on the display of the remote
controller.

• 2-digits alphanumeric will be indicated on the display.

• All lamps on the indoor unit will flash.

(5 times per 1 sec.)

Push [START/STOP] button to release the service mode.

3

• The display of the remote controller returns to as it
was before service mode was engaged.

Time shotening method.

4

1. Push SET button while pushing CHECK button.

2. Push [START/STOP] button.

Fig. 10-4-1

– 50 –

10-4-2. Caution at Servicing

(1) After servicing, push the START/STOP button to return to the normal mode.
(2) After servicing by the check code, turn off breaker of the power supply, and turn on breaker of the power

supply again so that memory in the microcomputer returns the initial status. However, the check codes are
not deleted even if the power supply is turned off because they are stored in the fix ed memory.

(3) After servicing, push [CLR] button under check mode status and then send the check code “7F” to the

indoor unit. The error code stored in memory is cleared.

Table 10-4-1

Block distinction

Check

code

Block

Indoor P.C.
board etc.

Not
displayed

Connecting
cable and
serial signal

Check

code

Operation of diagnosis function

Cause of operation

Short-circuit or discon­nection of the room
temperature sensor
(TA sensor).

Being out of place,
disconnection, short­circuit, or migration of
heat exchanger sensor
(TC sensor)

Lock of indoor fan or
trouble on the indoor fan
circuit

Trouble on other indoor
P.C. boards

Return serial signal is
not sent to indoor side
from operation started.

(1) Defective wiring of

connecting cable

(2) Operation of

compressor thermo.
Gas shortage Gas
leak

Air

conditioner

status

Operation
continues.

Operation
continues.

All off

Operation
continues.

Operation
continues.

Remarks

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Flashes when
trouble is detected
on Return serial
signal, and normal
status when signal
is reset.

Judgment and action

1. Check the room temp. sensor.

2. When the room temp. sensor is
normal, check P.C. board.

1. Check heat exchanger sensor.

2. When heat exchanger sensor is
normal, check P.C. board.

1. Check the motor.

2. When the motor is normal,
check P.C. board.

Replace P.C. board.

1. When the outdoor unit never
operate:

(1) Check connecting cable,

and correct if defective
wiring.

(2) Check 25A fuse of inverter

P.C. board.

(3) Check 3.15A of inverter P.C.

board.

2. To display [Other] block during
operation, check compressor
thermo. operation and supply
gas (check gas leak also).

3. Unit operates normally during
check.
If Return serial signal does not
stop between indoor terminal
board 2 and 3, replace inverter
P.C. board.
If signal stops between indoor
terminal board 2 and 3, replace
indoor P.C. board.

– 51 –

Block distinction

Check

code

Block

Outdoor P.C.
board

Check

code

Operation of diagnosis function

Cause of operation

Inverter over-current
protective circuit
operates. (Short time)

Air

conditioner

status

All off

Remarks

Displayed when
error is detected.

Judgment and action

Even if trying operation again, all
operations stop immediately. :
Replace P.C. board.

Not
displayed

Outdoor P.C.
board

Others
(including
compressor)

Position-detect circuit
error or short-circuit
between windings of
compressor

Current-detect circuit
error

Being out of place,
disconnection or short­circuit of the outdoor heat
exchanger sensor (TE) or
suction temp. sensor (Ts)

Disconnection or short­circuit of discharge
temp. sensor

Outdoor fan drive
system error

Outdoor heat exchanger
temp. sensor error

Compressor drive
output error, Compres­sor error (lock, missing,
etc.), Break down

Return serial signal has
been sent when
operation started, but it
is not sent from halfway.

(1) Compressor thermo.

operation
Gas shortage
Gas leak

(2) Instantaneous power

failure

Compressor does not
rotate.
(Current protective
circuit does not operate
when a specified time
passed after compres­sor had been activated.)

Discharge temp.
exceeded 117°C

Break down of
compressor

Four-way valve inverse
error (TC sensor value
lowered during heating
operation.)

All off

All off

All off

All off

All off

Operation
continues

All off

Operation
continues

All off

All off

All off

Operation
continues

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

——

Displayed when
error is detected.

Flashes when
trouble is detected
on return serial
signal, and normal
status when signal
is reset.

Displayed when
error is detected.

Displayed when
error is detected.

Displayed when
error is detected.

——

1. Even if connecting lead wire of
compressor is removed,
position-detect circuit error
occurred. : Replace P.C. board.

2. Measure resistance between
wires of compressor, and
perform short-circuit. : Replace
compressor.

Even if trying operation again, all
operations stop immediately. :
Replace P.C. board.

1. Check sensors (TE, TS).

2. Check P.C. board.

1. Check discharge temp. sensor
(TD).

2. Check P.C. board

Position-detect error, over-current
protective operation of outdoor fan
drive system, fan lock, etc. :
Replace P.C. board or fan motor.

1. Check outdoor temp. sensor
(TO).

2. Check P.C. board.

When 20 seconds passed after
start-up, position-detect circuit
error occurred. : Replace compres­sor.

1. Repeat Start and Stop with
interval of approx. 10 to 40
minutes. (Code is not displayed
during operation.)
Supply gas. (Check also gas
leak).

2. Unit operates normally during
check.
If return serial signal does not
stop between indoor terminal
block 2 and 3, replace inver ter
P.C. board.
If signal stops between indoor
terminal block 2 and 3, replace
indoor P.C. board.

1. Trouble on compressor

2. Trouble on wiring of compressor
(Missed phase)

1. Check dischage temp. sensor
(TD).

2. Gas leakage

3. Trouble on P.M.V.

1. Check power voltage.
(220–230–240 V +10%)

2. Overload operation of refrigera­tion cycle
Check installation condition
(Short-circuit of outdoor diffuser).

1. Check four-valve operation.

– 52 –

10-5. Judgment of Trouble by Every Symptom

10-5-1. Indoor Unit (Including Remote Controller)

(1) Power is not turned on (Does not operate entirely)

<Primary check>

1. Is the supply voltage normal?

2. Is the normal voltage provided to the outdoor unit?

3. Is the crossover cable connected properly?

4. Is the fuse (F01) blown?

Operation

Check Item

Considerable principle cause

of indoor control

NO

indicated on rear of

Is DC310–340V

supplied to
primary side of
transfer switch?

YES

Are DC15V, 12V

and 7V supplied to

secondary side of

transfer switch?

YES YES

Turn off power supply once, and
5 second later, turn it on again.

NO

Is OPERATION lamp flashing?

YES

Is it possible to turn on

power supply by pushing

[START/STOP] button

on remote controller?

YES YES

Unit operates normally.

Is fuse (F01)

board blown?

NO

Is voltage

(DC12V or 5V)

indoor control
board normal?

NO

NO NO

Turn off breaker once
and turn it on again
after removing motor.

YES YES

Parts (R04, R05, DB01, C01,

C03, IC01 and T01) are defective.

YES

Refer to <Primary check>

or this problem is one step

short of power P.C. board block.

Are DC15V, 12V

and 7V supplied to

secondary side of

transfeor switch?

Does transmission mark

NO NO

on remote controller flash

normally,and is its signal

transmitted properly?

motor connector

between 1 and 2

Microcomputer

Transfer swith,

power supply or

Does fan

short-circuit?

NO

is defective.

IC (IC01) for
fan motor is

defective.

Measures

Item by symptoms

Remote controller is defective.

Refer to (5) “Troubleshooting
for remote controller”.

Replace main
P.C. board

Replace motor.

• Be sure to disconnect the motor connector CN10 after shut off the power supply, or it will be a cause of
damage of the motor .

(2) Power is not turned on though Indoor P.C. board is replaced

<Confirmation procedure>

Turn on power supply.

Does operation lamp flash?

NO NO

YES YES

Is wired correctly to white and black

lead wires of terminal block?

Correct wiring.

To item of “Power supply
is not turned on”.

– 53 –

(3) Only the indoor motor fan does not operate

<Primary check>

1. Is it possible to detect the power supply voltage (A C220–240V) between  and  on the terminal block?

Turn off power
supply once, and
turn it on again.

Does fan motor

continue to operate?

NO

Start to operate
indoor unit in cooling
operation at airflow
level “LOW”.

Does indoor
fan operate?

YES

Change airflow level
to “HIGH”.

Is it possible to

change airflow level

to “HIGH”?

YES

Is it possible to detect

YES

DC 1V or more between

5 + and 3 – of

motor connector (CN10).

YES

Is it possible to detect

NO

DC 310–340V between

1 + and 3 – of motor

connector (CN10).

YES

(Motor connection condition)

Is it possible to detect DC 15V

between 4 + and 3 – of

motor connector (CN10).

YES

Start to operate

the indoor unit.

At this time, is it possible to

detect DC 1V or more between

5 + and 3 – of motor

connector (CN10)?

YES

NO

Is it possible to

rotate cross-flow fan by

hand properly?

YES

NO

NO

Turn off indoor unit and remove
connector from motor.

NO

Then push START/STOP button
on remote controller to stop
flashing lamp on indoor unit.

Is it possible to detect

DC 15V between 4 +

and 3 – of motor

connector (CN10).

Turn off indoor unit and

NO

remove connector from motor.
Then start to operate indoor
unit with remote controller.

Start to operate

the indoor unit.
At this time, is it possible
to detect DC 1V or more

between 5 + and 3 –

of motor connector (CN10)?

(Check this condition

within 15 seconds after

starting unit.)

NO

YES

YES

NO

NO

Peplace indoor
fan motor.

Peplace main
P.C. board.

Peplace
bearing.

Fan motor
operates normally.

Turn off indoor unit

and rotate cross-flow

fan by hand when the

unit is on standby.

At this time, is it possible to

detect DC 1V or more

between 5 + and 3 –

of motor connector

(CN10).

YES

NO

– 54 –

(4) Indoor fan motor automatically starts to rotate by turning on power supply

<Cause>

The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to inside of the motor.
If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning

on power supply.

<Inspection procedure>

1. Remove the front panel. (Remove 2 screws.)

2. Remove the cover of the fan motor lead wires.

3. Check DC voltage with CN10 connector while the fan motor is rotating.

NOTE :

• Do not disconnect the connector while the fan motor is rotating.

• Use a thin test rod.

Indoor fan starts rotating when power supply is turned on.

P.C. board

(Check output DC voltage of fan motor on P.C. board.)

Measure voltage between 3 (GND : BLACK)

and 5 (V line : YELLOW) of motor connector (CN10)

while indoor fan motor is rotating.

DC 1.0V or more

P.C. board is defective.

Replace P.C. board. Replace motor.

Under DC 1.0V

Motor is defective.

Yellow

Black

DC

CN10

6 (Blue)
5 (Yellow)
4 (White)
3 (Black)
2 –
1 (Red)

– 55 –

(5) Troubleshooting for remote controller

<Primary check>

Check that A or B selected on the main unit is matched with A or B selected on the remote controller.

Is receiver

on indoor unit

exposed to

direct sunlight?

YES

NO

Is there any

thyristor

fluorescent light

nearby?

YES

NO

Push the START/STOP button.

Is transmission

mark indicated?

YES

Does indoor unit

NO

operate when moving

remote controller

near receiver or

indoor unit?

YES

Batteries are

exhausted.

The unit does not beep at all.
Operation lamp on indoor
unit is not indicated.

NO

Push RESET button
on remote controller
with tip of pencil.

Avoid direct
sunlight.

NO

Keep indoor unit
away from thyristor
fluorescent light.

Does indoor unit

start to operate by

automatic restart

function?

YES

Does radio sound

is affected by remote

controller when a signal is

transmitted at distance of

5 cm from radio?

YES

P.C. board
is defective.

Replace
P.C. board.

NO

NO

Replace
batteries.

Push the START/
STOP button

Is transmission
mark indicated?

YES

Does indoor unit

beep and operate?

YES

Normal

operation

NO

Remote controller

is defective.

Replace
remote controller.

NOTE : After replacing batteries,

push the RESET button
with a tip of a pencil.

– 56 –

10-5-2. Wiring Failure (Interconnecting and Serial Signal Wire)

(1) Outdoor unit does not operate

1) Is the voltage between  and  of the indoor terminal block varied?
Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the follow-

ing diagram.

NOTE:

• Measurement should be performed 2 minutes and 30 seconds after starting of the operation.

• Be sure to prepare a diode for judgment.

Terminal block at indoor side

Red

White

3
2

Terminal block

1

S5277G

S5277G or equivalent (G or J type)
(Diode with rated voltage of 400V
or more is acceptable.)

Tester

Normal time : Voltage swings between DC15 and 60V. ...................Inverter Assembly check (10-8-1)

Abnormal time : V oltage does not vary.

(2) Outdoor unit stops in a little while after operation started

<Check procedure> Select phenomena described below.

(1) The outdoor unit stops 10 to 20 minutes after operation started, and 10 minutes or more are required to

restart the unit.

Gas circulation amount is down.

Measure gas pressure.

Thermo. operation of compressor

Gas shortage
Gas leak
Pipe clogging

(2) If the unit stops once, it does not operate until the power will be turned on again.

To item of Outdoor unit does not operate.

(3) The outdoor unit stops 10 minutes to 1 hour after operation started, and an alarm is displayed.

(Discharge temp. error check code 03, 1E Sensor temp. error check code 02, 1C)

Gas leak
P.M.V. is defective.
Miswiring of connecting wires of indoor/outdoor units
Clogging of pipe and coming-off of TC sensor

Refer to the chart in 10-6.

– 57 –

10-6. Check Code 1C (Miswiring in indoor/outdoor units) and 1E

<Check procedure>

1C 1E

Gas leakage,
disconnection of TS/TC
sensors (Check code 02, 1C)

Valve drive check

Discharge temp. error,
gas leakage
(Check code 03, 1E)

Is coil of the pulse modulating valve

(P.M.V.) correctly set?

YES

Is connecter of coil connected to inverter?

YES

Is positioning sound of valve (sound hitting to stopper) heard

from valve when the air conditioner starts the operation after turning off power

Are temp. sensors of indoor/outdoor units correctly set to the holder?

NOTE :

The temperature sensors which are used to control pulse modulating valve
include indoor heat exchanger sensor (TC), outdoor suction temp. sensor (TS)
and outdoor sensor (TO).

of the air conditioner once?

YES

YES

NO

NO

NO

NO

Set it correctly.

Set it correctly.

Replace coil valve.

Set it correctly.

Gas amount check and valve clogging check

Remove TC sensor connector from the P.C. board in indoor unit.
(Remove connector from the P.C. board.)
Operate the air conditioner in COOL mode by TEMP button
(“Pi” sound is heard if keeping pushed for 10 seconds.).
The operation enters temporary operation mode which fixes opening degree of compressor speed.
Check condensation at outlet of PMV, and then check operating pressure from the service port.

If there is condensation at outlet (1/4 inch=Ø6.35mm valve side),

Check the operating pressure from service port, and add gas if pressure is low.

Existence of condensation at outlet of P.M.V.

the valve is clogged.

YES

– 58 –

Replace valve.

Add gas.

10-7. Troubleshooting

10-7-1. How to Check Whether the Air Purifier is Good or Not

Turn off the power breaker once,
and turn on again after 10 seconds.

Does the operation lamp flash?

YES

Turn off the power breaker and remove
CN34 (Micro switch connector).
Short-circuit between and pin
of CN34 at PC side, and turn on the
power breaker after 10 seconds.

Is DC12V applied

between (Red/DC12V) and

(Brown/GND) of CN1 of the

1 1 2

high-voltage unit?

Primary checkOperation check

Is there conduction of

micro-switch connector under

OFF status of the micro-switch

(Front panel opened)?

Is there conduction of
micro-switch connector under
ON status of the micro-switch

(Front panel closed)?

1) Check operation while short-circuiting CN34 of the main P.C. board.

2) Perform air purifying operation by the remote controller.

• In this time, check that the remote controller is in status which is shortened by time on
the reactivation preventive timer and all display lamps go on for approx. 3 seconds
when a signal is received.
If time on the reactivation preventive timer is not shortened,

( )

the high-voltage is not applied to electrode of the air purifier for approx. 1 hour.

• While the air purifier operates, check that the fan speed [AUTO] is not displayed.
(Because the power ON/OFF is controlled on the program)

3) Be sure not to touch the dust collector, ionizer, or ionized wire unit with the human body.

1 2

YES

NO

YES

NO

NO NO

YES

NO

Is DC12V applied

between (+) and (–)

of CN33 of the main

P.C. board (MCC891)?

YES

Micro-switch is stuck

Micro-switch malfunction

To item “Power supply is not turned on”

Replace the main P.C. board (MCC891)

Replace micro-switch.

• Conduction check of micro-switch

Push the switch

ON

Tester

ON

Release the switch

OFF

NO

NO

NO

Is DC-5V to DC-10V

NO

Dry the dust
collector and
ionizer.

Referring to the right figure, check the
high-output voltage of the air filter unit.

(NOTE)

Use an exclusive high voltage tester;
otherwise the tester may be broken.

YES

applied between

(Brown/Negative voltage)

4

2

and (Brown/GND)

of CN33 of the main

P.C. board?

Is output of the ionizer

approx. 3.9kV to 4.7kV?

Is output of the collector

approx. 2.9kV to 3.7kV?

Are the dust

collector/ionizer/ionized

wire units dirty?

Is an abnormal sound

(cracking noise) heard

from the electrode?

Does the indoor fan rotate?

YES

Does the plasma lamp (Blue) or

the filter lamp (Orange) go on?

YES

Does the plasma lamp

go off within 2 seconds after

it was ON, and does the

filter lamp (Orange) go on?

YES

Are the dust collector

and ionizer dried?

(Electrode check)

YES

Refer to items, cleaning and check
for the dust collector/ionizer/ionized
wire units.
When the ionized wire is
disconnected or when dirt is

( )

not cleaned even cleaned,
replace each unit.

YES

YES

YES

To item “Only indoor fan does not operate”

Replace the main P.C. board (MCC891).

• How to check output of the air purifier

NO

GND
Be sure not to come to
contact to the silver part

[ ]

or not to touch the
ionized cables.

NO

NO

<Caution on High Voltage!!>

Ionizer

Output

High-voltage tester

Replace the high-voltage unit.

No trouble

Collector
output

– 59 –

10-7-2. How to Check Whether the Minus Ion Generator is Good or Not

Turn off the power breaker once,
and turn on again after 10 seconds.

Does the operation lamp flash?

YES

Turn off the power breaker and remove
CN34 (Micro switch connector).
Short-circuit between and pin
of CN34 at PC side, and turn on the
power breaker after 10 seconds.

Is DC12V applied

between (Red/DC12V) and

2

(Brown/GND) of CN1 of the

high-voltage unit in the air purifier?

1

Primary checkOperation check

Is there conduction of

micro-switch connector under

OFF status of the micro-switch

(Front panel opened)?

Is there conduction of
micro-switch connector under
ON status of the micro-switch

(Front panel closed)?

1) Check operation while short-circuiting CN34 of the main P.C. board.

2) Perform air purifying operation by the remote controller.

• In this time, check that the remote controller is in status which is shortened by time on
the reactivation preventive timer and all display lamps go on for approx. 3 seconds
when a signal is received.
If time on the reactivation preventive timer is not shortened,

( )

the high-voltage is not applied to electrode of the air purifier for approx. 1 hour.

• While the air purifier operates, check that the fan speed [AUTO] is not displayed.
(Because the power ON/OFF is controlled on the program)

3) Be sure not to touch the electrode with the human body.

1 2

YES

NO

YES

NO

NO

YES

NO

Micro-switch is stuck

Micro-switch malfunction

To item “Power supply is not turned on”

Replace the power P.C. board

(MCC891) or the housing assembly.

Replace micro-switch.

• Conduction check of micro-switch

Push the switch

ON

ON

Release the switch

OFF

Tester

Does the indoor fan rotate?

YES

Does the plasma lamp (Blue) or

the filter lamp (Orange) go on?

YES

Does the plasma lamp

go off within 2 seconds after

it was ON, and does the

filter lamp (Orange) go on?

NO

Referring to the right figure, check the
high-voltage output of the air ionizer.
In this time, peel the thermal insulator, and attach
it to the original position after check operation.

NOTE :

Use an exclusive high voltage tester; otherwise
the tester may be broken.

NO

Does the electrode

output approx. –6kV?

NO

Integrated

power supply assembly

NO

NO

YES

YES

No trouble

To item “Only indoor fan does not operate”

Replace the main P.C. board (MCC891).

To item “How to check whether

the air purifier is good or not”

• How to check output of minus ion
<Caution on High Voltage!!>

high-voltage
unit

GND

High-voltage tester

Electrode

– 60 –

10-8. How to Diagnose Trouble in Outdoor Unit

10-8-1. Summarized Inner Diagnosis of Inverter Assembly

Table 10-8-1

Diagnosis/Process flowchart Item

Preparation

Remove
connector of
compressor.

Check 25A fuse

(Part No.F01).

OK

Check

terminal voltage

of electrolytic

capacitor.

OK

NG

Replace fuse.

Check

electrolytic

capacitor, diode

block (DB01),

etc.

NG

Check

electrolytic

capacitor, diode

(DB01),

etc.

Check

Check

Contents

Tur n “OFF” the power supply
breaker, and remove 3P
connector which connects
inverter and compressor.

• Check whether 25A fuse on
the control board assembly
is blown or not. (F01)

Summary

If fuse was blown, be sure
to check the electrolytic
capacitor and diode block.
(DB01)

• Connect discharge
resistance (approx.
100Ω40W) or soldering
iron (plug) between +, –
terminals of the electro­lytic capacitor (500µF) of
C14 (with printed CAU­TION HIGH VOLTAGE) on
P.C. board.

Discharging position
(Discharging period
10 seconds or more)

Plug of
soldering
iron

Does outdoor

fan rotate?

YES

Does LED on control
board flash or go on?

CN300 of outdoor fan

NG

tester, check resistance

phases at motor side.

Replace
outdoor
fan motor.

NO

NO

Remove connector
motor, and using a

value between every

OK

YES

CBA

Operation

Measurement

Check

Stop

Check

Measurement

Turn on the power breaker,
and operate the air condi­tioner in COOL mode by time
shortening.

Measure terminal voltage of
the electrolytic capacity.

500µF:400WV x 3

After operation, turn off the
power breaker after 2 minutes
20 seconds passed, and
discharge the electrolytic
capacitor by soldering iron.
Check voltage between motor
phases.

• Is not winding between

, -

, or - opened



or short-circuited?

• Is not frame grounded with
, or ?

, 

OK if 500µF

→→

→

→→

DC280 to 380V
Remove CN300 while

pushing the part indicated
by an arrow because CN01
is a connector with lock.

-

→→

→ Resistance between

→→

phases should be
approx. 55 to 77Ω

→→

→ Should be 10MΩ or

→→

more.

– 61 –

Diagnosis/Process flowchart Item

Contents

Summary

fan motor

NG

Replace
outdoor
fan
motor.

Check

compressor

winding

resistance.

OK

Replace

control board.

CBA

Check

winding of

compressor.

OK

Check

position

detect

signal.

OK

Replace control
board assembly.

NG

Replace

compressor.

NG

Replace
com­pressor.

Check

Operation

Check

Check winding resistance
between phases of compres­sor, and resistance between
outdoor frames by using a
tester.

• Is not grounded.

• Is not short-circuited

between windings.

• Winding is not opened.

Remove connector CN300 of
the outdoor fan motor, turn
on the power supply breaker,
and perform the operation.
(Stops though activation is
prompted.)

Check operation within 2
minutes 20 seconds after
activation stopped.

<Output check of fan motor
position detect signal>

While connecting connector
5P (CN301) for position
detection, using a tester,
measure voltage between

- . Between  -  : 5V



→ OK if 10MΩ or more



→ OK if 0.51Ω → 0.57Ω



(Check by a digital tester.)



a) One or two of three

voltages should be 5V,
and others should be 0V.
(When all are 0V or 5V, it
is not accepted.)

b) When rotating the fan

slowly with hands, the
voltage between pins
should move from 0V to
5V.
(Check it with an analog
tester.)

10-9. How to Check Simply the Main

Parts

10-9-1. How to Check the P.C. Board

(Indoor Unit)

(1) Operating precautions

1) When removing the front panel or the P.C.
board, be sure to shut off the power supply
breaker.

2) When removing the P.C. board, hold the edge
of the P.C. board and do not apply force to the
parts.

3) When connecting or disconnecting the
connectors on the P.C. board, hold the whole
housing. Do not pull at the lead wire.

(2) Inspection procedures

1) When a P.C. board is judged to be defective ,
check for disconnection, burning, or discol­oration of the copper foil pattern or this P.C.
board.

2) The P.C. board consists of the following 2
parts

a. Main P.C. board part :

DC power supply circuit (5V, 12V, 15V),
Indoor fan motor control circuit, CPU and
peripheral circuits, buzzer, and Driving
circuit of louver.

b. Indication unit of infrared ray receiving

Infrared ray receiving circuit, LED :

To check defect of the P.C. board, f ollow
the procedure described below.

– 62 –

(3) Check procedures

Table 10-9-1

No.

1

Turn off the power supply breaker
and remove the P.C. board
assembly from electronic parts
base. Remove the connecting
cables from the terminal block.

2

Remove the connector of the
motor and turn on the power
supply breaker. If OPERATION
lamp flashes (once per second),
it is not necessary to check steps
(1 to 3) in the right next column.

3

Push [START/STOP] button once
to start the unit. (Do not set the
mode to On-Timer operation.)

4

Shorten the restart delay timer
and start unit.

Procedure

Check points

Check whether or not the fuse
(F01) is blown.

Check power supply voltage :

1. Between No. 1 and No. 3 of CN23
(AC 220–240V)

2. Between + and – of C03
(DC 310–340V)

3. Between – of C10 and output
side of IC08 (DC 15V)

4. Between 12V and GND

5. Between 5V and GND

Check power supply voltage :

1. Between CN21 and
No. 1 of CN23 (DC 15–60V)

Check whether or not all lamps
(OPERATION, TIMER, FILTER,
Plasm

a) are indicated for

3 seconds and they return to
normal 3 seconds later.

Causes

Impulse voltage was applied or the
indoor fan motor short-circuited.

1. The terminal block or the crossover
cable is connected wrongly.

2. The capacitor (C01), line filter (L01),
resistor (R05), or the diode (DB01)
is defective.

3. IC01, IC08 and T01 are defective.

4. IC01, IC08 and T01 are defective.

5. IC01, IC08, IC07 and T01 are
defective.

IC03 and IC04 are defective.

The lamps are defective or the housing
assembly (CN13) is defective.

5

Push [START/STOP] button once
to start the unit,

• Shorten the restart delay timer.

• Set the operation mode to

COOL.

• Set the fan speed level to
AUTO.

• Set the preset temperature
much lower than the room
temperature. (The unit (com­pressor) operates continuously
in the above condition.)

6

Connect the motor connector to
the motor and turn on the power
supply.
Start the unit the following
condition.

• Set the fan speed level to
HIGH. (The unit (compressor)
operates continuously in the
above condition in No. 5.)

1. Check whether or not the
compressor operates.

2. Check whether or not the
OPERATION lamp flashes.

1. Check it is impossible to detect
the voltage (DC 15V) between 3
and 4 of the motor terminals.

2. The motor does not operate or
the fan motor does not rotate
with high speed.
(But it is possible to receive the
signal from the remote controller.)

3. The motor rotates but vibrates
strongly.

1. The temperature of the indoor heat
exchanger is extremely low.

2. The connection of the heat ex­changer sensor is loose.
(The connector is disconnected.)
(CN01)

3. The heat exchanger sensor and the
P.C. board are defective.
(Refer to Table 10-4-1.)

4. The main P.C. board is defective.

1. The indoor fan motor is defective.
(Protected operation of P.C. board.)

2. The P.C. board is defective.

3. The connection of the motor
connector is loose.

– 63 –

10-9-2. P.C. Board Layout

GND

+12V

[1] Sensor characteristic table

100

90
80
70
60
50
40
30

Resistance value (k )

20
10

0

0102030 4050

Temperature (˚C)

TD

TA, TC, TO, TS

+5V

TD : Discharge temp. sensor
TA : Room temp. sensor
TC : Heat exchanger temp. sensor
TO : Outdoor temp. sensor
TS : Suction temp. sensor

– 64 –

10-9-3. Indoor Unit (Other Parts)

No.

1

Room temp. (TA) sensor

Part name

Heat exchanger (TC) sensor

Remote controller

2

Louver motor

3

MP24GA

Checking procedure

Disconnect the connector and measure the resistance value with
tester. (Normal temp.)

Temperature

Sensor

TA, TC (kΩ)

10°C20°C25°C30°C40°C

20.7 12.6 10.0 7.9 4.5

Refer to 10-5-1. (5).

Measure the resistance value of each winding coil by using the tester.
(Under normal temp. 25°C)

White
Yellow
Yellow
Yellow
Yellow

1

1

2

2

3

3

4

4

5

5

Position

1 to 2
1 to 3
1 to 4
1 to 5

Resistance value

380 ± 40 Ω

Refer to 10-5-1. (3) and (4).Indoor fan motor4

10-9-4. Outdoor Unit

No.

1

Compressor
(Model : DA91A1F-45F)

2

(Model : ICF-140-43-1)

Compressor thermo. Bimetal

3

type (Model : US­622KXTMQO-SS)

Part name

Checking procedure

Measure the resistance value of each winding by using the tester.

Red

Position

Resistance value

Red - White

White Black

White - Black

Black - Red

0.51 to 0.57 Ω

Under 20°C

Measure the resistance value of winding by using the tester.Outdoor fan motor

Red

White Black

1 Yellow
4 Pink

5 Gray

Position

Yellow- Pink

Resistance value

5 to 20 kΩ

For details, refer to Section 10-9.

Check conduction by using the tester.

Outdoor temperature sensor

4

(TO), discharge temperature
sensor (TD), suction
temperature sensor (TS)

Disconnect the connector, and measure resistance value with the
tester. (Normal temperature)

Temperature

Sensor

TD (kΩ)

10°C20°C30°C40°C50°C

105 64 41 27 18

TO , TS : Refer to the TA, TC characteristic table in Indoor.
(Refer to 10-9-3, No. 1)

– 65 –

10-9-5. Checking Method for Each Part

No.

1

Part name

Electrolytic capacitor
(For boost, smoothing)

2

Converter module

Checking procedure

1. Turn OFF the power supply breaker.

2. Discharge all three capacitors completely.

3. Check that safety valve at the bottom of capacitor is not broken.

4. Check that vessel is not swollen or exploded.

5. Check that electrolytic liquid does not blow off.

6. Check that the normal charging characteristics are shown in continuity test
by the tester.

C12 C13 C14

Case that product is good

P ointer swings once, and returns
slowly. When performing test
once again under another polarity,
the pointer should return.

Heat sink IGBT side

MCC-813
Soldered
surface

C12, C13, C14 → 500µF/400V

1. Turn OFF the power supply breaker.

2. Discharge all three capacitors completely.

3. Check that the normal rectification characteristics are shown in continuity
test by the tester .

+ ~ – ~ A

21

Diode check IGBT check

Tester rod

+ –
~

1

~

2

+

E

~

1

~

2

Resistance value

in good product

–

~

1

~

2

50k

1
2

(0 in trouble)

~
~

A

E G

or more

+ ~1– ~

Tester rod

+ –
~

2

E

G

Mark

A

2

Resistance value

in good product

50k
(0 in trouble)

E G

or more

– 66 –

10-10. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad

1. Symptom

• Outdoor fan motor does not rotate.

• Outdoor fan motor stops within sev eral tens seconds though it started rotating.

• Outdoor fan motor rotates or does not rotate according to the position where the fan stopped, etc.
Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”

2. Cause

The following causes are considered when the outdoor fan motor does not normally rotate.

1) Mechanical lock of the outdoor fan motor

2) Winding failure of the outdoor fan motor

3) Position-detect circuit failure inside of the outdoor fan motor

4) Motor drive circuit failure of the outdoor P.C. board

3. How to simply judge whether outdoor fan motor is good or bad

Turn OFF the breaker.

Disconnect two connectors (CN300 and CN301)

of the outdoor fan motor from the outdoor P.C. board.

Does the fan rotate without trouble

when rotating it with hands?

YES

If the resistance value between
1 (Red lead) – 2 (White lead)
2 (White lead) – 3 (Black lead)
3 (Black lead) – 1 (Red lead)

If the resistance value between

1 (Yellow lead) – 4 (Pink lead)

(CN301 : Motor position detection)

of the connector
(CN300 : Motor winding)
is 17 to 25

of the connector

is 5k to 20k

Fan motor is normal.

(Outdoor P.C. board error)

, it is normal.

YES

, it is normal.

YES

NO

NO

NO

CN300

CN301

Fan motor error

NOTE :

However, GND circuit error inside of the motor may be accepted in some cases when the above check is
performed.

When the fan motor does not become normal even if P.C. board is replaced, replace the outdoor fan motor.

– 67 –

11-1. Indoor Unit

11. HOW TO REPLACE THE MAIN PARTS

No.Part name

Front panel

Procedures

1) Stop operation of the air conditioner and turn off
its main power supply.

2) Push “PUSH” part under the front panel and
remove hooks of the front panel from the
installation plate.

3) Remove the front panel fixing screws (2 pcs.)
while opening the air inlet grille.

4) Push the electric parts box with the right thumb
while pulling the both sides of the front panel
toward you.

<How to assemble the front panel>

1) Push three center positions and two lower
center positions of the air outlet, and then hang
the hanging hooks (4 pcs.) at the top side of the
front panel to the rear plate.

2) Tighten two screws.

• Incomplete hanging or incomplete pushing

may cause a dewdrops or gener ation of a
fluttering sound.

Remarks

Installation
plate

Front panel

Push

Push

Hanging hooks at the top side

Fixing
screw

(4 positions)

Push Push Push

Push Push

Push

Fixing
screw

Electric parts



box assemb l y

Horizontal



louver

1) Follow to the procedure in the item .

2) Remove the drain guide.

3) Remove the electric dust collector. (*)

4) Remove screw of earth lead attached to the end
plate of the heat exchanger.

5) Remove the lead wire cover, and remov e
connector (5P) for the fan motor and connector
(5P) for the louv er motor from the microcom­puter assembly.

6) Remove a fixing screw of the electric parts base
and draw out it tow ard you.

7) Pull out TC sensor from sensor holder of the
heat exchanger.

8) As shown in the right figure, treat the lead wire
surely after replacement of the parts.
(Otherwise, water leak is caused.)

* For removal/mounting of the electric dust

collector, follow to the item , How to replace
the electric dust collector.

1) Remove shaft of the horizontal louver from the
rear plate. (First remove the left shaft, and then
remove other shafts while sliding the horizontal
louver leftward.)

Screw

Drain
guide

TC sensor

Lead wire
cover

Fixing screw

– 68 –

No.

Bearing base

Bearing

Drain pipe

Part name

Procedures

Remarks

Heat exchanger



1) Follow to the procedure in the item .

2) Remove the pipe holder from the rear side of
the main unit.

3) Remove two fixing screws at the left side of
the end plate of the heat exchanger.

4) Remove the fixing screw at the lower right
side of the heat exchanger.

5) Remove right side of the end plate from two
fixing ribs while sliding slightly the heat
exchanger rightward.

Hanged part

Fixing screws

Fixing screws

Pipe holder

Fixing screws





Bearing

Fan motor

1) Follow to the procedure in the items  and

-4), and remove the bearing from the



bearing base.

<Caution at assembling>

If the bearing is out from the housing, push it
into the specified position and then incorporate
it in the main body.

1) Follow to the procedure in the item .

2) Loosen the set screw of the cross flow fan.

3) Remove two fixing screws of the motor band
(Right), and then remove the motor band
(Right).

4) Pull the fan motor outward.

Heat exchanger fixing holder

In assembling work, install the fan
motor as follows .

Arrange mark of the concave
round hole (or circle mark)
correctly with mark of
the motor band (Right).

Concave
round hole or
circle mark

Mark

– 69 –

No.Part name

Procedures

Remarks

Cross flow
fan

1) Stop operation of the air conditioner and turn off
its main power supply.

2) Follow to the procedure in the item .

3) Remove two fixing screws at the left side of the
end plate of the heat exchanger, and remove
two fixing screws of the bearing base.

4) Lift up slightly the left side of the heat ex­changer to remove the bearing base.

5) Loosen the set screw of the cross flow fan.

6) Remove two fixing screws of the motor band
(Right) to remove the motor band (Right).

Fixing screws

Motor band (Right)

7) Slide the fan motor outward to remove it.

8) Remove the fixing screws at the lower right side
of the heat exchanger.

9) Remove the heat e xchanger from two hanged
parts of the motor band (Left) while sliding it
rightward.

Rear side of mains

Heat exchanger

Top view of the set

(Without panel)

Fixing screws
(Bearing base)

Fixing
screws

Bearing
base

Hanged part

10) Lift up the left side of the heat exchanger

toward you to remove the cross flow fan.

Set screw

Cross flow fan

– 70 –

No.Part name

70.5mm

Joint

Procedures

Remarks

Cross flow
fan

• Caution at reassembly

a) At assembling work of the bearing base, check that

the drain pipe is surely incorporated
in the rear plate.
(Otherwise, water

Drain pipe

leak is caused.)

b) To incorporate the fan motor, remove the fan motor

rubber (at shaft core side), incorporate the motor
into the position in the following figure, and then
install the fan motor.

• Install the cross flow fan so that the right end of

the 1st joint from the right of the cross flow fan is
set keeping 70.5mm from wall of rear plate of the
main unit.

• Holding the set screw, install the cross flow fan so

that U-groove of the fan motor comes to the
mounting hole of the set screw.

U groove

• Install the fan motor for service work so that the

center D-letter cut part comes to the set screw
mounting hole position.

Center D-letter cut part

• Perform positioning of the fan motor as follows:

Arrange mark of the concave
round hole (or circle mark)
correctly with mark of
the motor band (Right).

Mark

Concave round
hole or circle mark

c) For incorporation of the motor band (Right), follow

to the above procedure b), incorporate two hanging
hooks of the motor band (Right) into the main unit,
and then follow to the reverse procedure in 7).

Motor band
(Right)

Hanging hooks
(Two positions)

– 71 –

11-2. How to Replace the Parts of Electric Dust Collector

(Be sure to pull off the power plug before work.)

No.Part name

Electric dust
collector

Procedures

1) Remove the front panel. ( Front panel)

2) Remove a fixing screw and a connector.

3) Remove the air ionizer.

4) Remove the electric dust collector vertically to
the heat exchanger.

<Caution at installation>

1) Arrange screw hole on the end plate correctly to
screw hole on the electric dust collector, insert
the fixing hooks at the rear side of the dust collector
into the heat exchanger , and then fix it with a scre w .

2) Install the air ionizer .

3) Perform wiring of the
lead wire as follows:

Remarks

Connector

Pipe

Air ionizer

Fixing hooks for
heat exchanger

Connector

Pipe

Screw
(1 pc.)

Screw (1 pc.)







Main frame
unit

Upper frame
collector

High-voltage
unit

1) Follow to the procedure in item .

2) Remove the dust collecting unit.
(Lift up it once, and then draw out it.)

1) Remove the dust collecting unit.

2) Remove the fixing hooks at 6 positions, and
separate the unit into upper frame and collector.

1) Follow to the procedure in item .

2) Remove two fixing hooks at upper and lower
sides of the cover to remove the cover.

3) Remove thick red and black Faston lead wires
and the connector attached to the main frame.

4) Remove the earth cover at the rear side of the
electric dust collector, and then remo ve the thin
black Faston wire.

5) As shown in the right figure, widen outward the
rib at the right side of the main frame and
remove the hooks of the high-voltage unit to
remove the high-voltage unit.

<Caution at installation>

1) Perform cabling as shown in the right figure.

Main frame

Hook

2

Upper frame

Hook

Main frame unit

Hook

1

Dust collector unit

Hooks

Hooks

Hook

Black

Red

Boss for
positioning

Connector

Hook

Collector

Black
(thin)

Hook

Cover

– 72 –

11-3. Microcomputer

No.



Part name

Common procedure

<P.C. board layout>

Procedure

1) Turn the power supply off to stop the
operation of air-conditioner.

2) Remove the front panel.

• Remove the 2 fixing screws.

3) Remove the electrical part base.

R05 C01CN23L01

FUSE R01 R04 CN10

Remarks

Replace terminal block,
microcomputer ass’y and the
P.C. board ass’y.

DB01

C03

T01

IC01

IC03

C20

– 73 –

Upper cabinet

Wiring
cover

Valve
cover

Square hole

Claw

Concave section

11-4. Outdoor Unit

Table-11-4-1

No.



Part name

Common
procedure

Procedure

1. Detachment

1) Stop operation of the air conditioner, and turn
off the main switch of the breaker for air condi­tioner.

2) Remove the valve cover. (ST1TØ4 x 10l 1 pc.)

• After removing screw, remove the valve cover

pulling it downward.

3) Remove wiring cover (ST1TØ4 x 10l 2 pcs.),
and then remove connecting cable.

4) Remove the upper cabinet.
(ST1TØ4 x 10l 2 pcs.)

• After removing screws, remove the upper

cabinet pulling it upward.

2. Attachment

1) Attach the upper cabinet.
(ST1TØ4 x 10l 2 pcs.)

• Hook the rear side of the upper cabinet to

claw of the rear cabinet, and then put it on the
front cabinet.

2) Perform cabling of connecting cable, and attach
the wiring cover .

• Insert the upper part into the upper cabinet,

insert claw which has been hooked to the
lower part into the square hole, and then fix it
with screw. (ST1TØ4 x 10l 1 pc.)

3) Attach the valve cover. (ST1TØ4 x 10l 1 pc.)

• Insert the upper part to the upper cabinet, set

hook claw of the valve cover to square holes
(at three positions) of the main unit, and
attach it pushing upward.

Remarks

 Front cabinet

1. Detachment

1) Perform work of item 1 of .

2) Remove screws (ST1TØ4 x 10l 2 pcs.) of the
front cabinet and inverter cover and screws
(ST1TØ4 x 10l 3 pcs.) of the front cabinet.

• The left side of the front is made to insert to

the rear cabinet, so remove it pulling upward.

2. Attachment

1) Insert claw at the left side of the front into the
rear cabinet.

2) Hook the lower part at the right side of the front
to concave part of the bottom plate. Insert claw
of the rear cabinet into square hole of the front
cabinet.

3) Attach the removed screws to the original
positions.

– 74 –

No.Part name

Procedure

Remarks

Inverter
assembly

1. Detachment

1) Perform work of item 1 of .

2) Remove screw (ST1TØ4 x 10l 2 pcs.) of the upper
part of the front cabinet.

• If removing the inverter cover in this condition,

P.C. board can be checked.

• If there is no space in the upper part of the upper

cabinet, perform work of .

Be careful to check the inverter because
high-voltage circuit is incorporated in it.

3) Perform discharging by connecting + , – polarity by
discharging resistance (approx. 100Ω40W) or plug
of soldering iron to + , – terminals of the C14
(printed “CAUTION HIGH VOLTAGE” is attached.)
electrolytic capacitor (500µF) on P.C. board.

Be careful to discharge the capacitor
because the electrolytic capacitor cannot
naturally discharge and voltage remains
according to trouble type in some cases.

Inverter cover

Discharging position
(Discharging period
10 seconds or more)

P. C. board
(Soldered surface)

Plug of
soldering
iron

NOTE :
This capacitor is one with mass capacity.
Therefore, it is danger ous that a large spark
generates if short-circuiting between + , –
polarity with screwdriver , etc. for disc harging.

4) Remove screw (ST1TØ4 x 10l 2 pcs.) fixing the
main body and the inverter box.

5) Remove various lead wires from the holder at
upper part of the inverter box and wiring holder at
right side of the terminal block.

6) Remove the lead wire from the bundled part at left
side of the terminal block.

7) Pull the inverter box upward.

8) Disconnect connectors of various lead wires.

Requirement :
As each connector has a lock mechanism,
avoid to remove the connector by holding
the lead wire, but by holding the connector.

Bundled
part

Holder

Terminal block

The connector is one with lock,
so remove it while
pushing the part
indicated by an
arrow.

– 75 –

Be sure to remove the connector
by holding the connector, not by
pulling the lead wire.

No.



Control board
assembly

Part name

Procedure

1) Disconnect lead wires and connectors con­nected from the control board assembly to other
parts.

1. Lead wires Lead wires Lead wires Lead

wires

• Connection with terminal block :
3 wires (Black, White, Orange)

• Connection with compressor :
Remove the connector (3P).

• Connection with reactor :
Remove the relay connectors from P07, 08
(2P, White).

2. Connectors
CN300 : Outdoor fan (3P, White)
CN301 : Outdoor fan position detection

(5P, White)
CN601 : TD sensor (3P, White)
CN603 : TS sensor (3P, White)
CN602 : TO sensor (2P, White)
CN500 : Case thermo. (2P, White)
CN703 : Pulse modulating valve (6P, White)

Remarks

CN703 CN602 CN301

CN500

CN603

CN601

CN300

CN300 and CN301, etc. at the
control board assembly side are
connectors with locks. Therefore,
remove the connector while
pushing the part indicated by an
arrow.



Rear cabinet

2) Remove the control board assembly from P.C.
board base.

1. Main control board assembly side

• Remove two claws of P.C. board base, and
remove upward the heat sink with hands.

• Remove three screws fixing the heat sink
and main control board assembly side, and
replace the board with a new one.

1) Perform work of item 1 of , and , .

2) Remove fixed screws fixing to the bottom plate.
(ST1TØ4 x 10l 3 pcs.)

3) Remove fixed screws fixing to the heat
exchanger. (ST1TØ4 x 10l 1 pc.)

4) Remove fixed screw fixing to the v alve mounting
plate. (ST1TØ4 x 10l 1 pc.)

P.C. board

P.C. board base

When mounting a new board,
check that the board is correctly
set in the groove of base holder of
P.C. board base.

Reactor

– 76 –

No.





Part name

F an motor

Compressor

Procedure

1) Perform work of item 1 of  and .

2) Remove the flange nut fixing the fan motor and
the propeller.

• Flange nut is loosened by turning clockwise.

(To tighten the flange nut, turn counterclock­wise.)

3) Remove the propeller fan.

4) Disconnect the connector for fan motor from the
inverter.

5) Remove the fixing screws (3 pcs.) holding by
hands so that the fan motor does not fall.

1) Perform work of item 1 of  and , , , .

2) Extract refrigerant gas.

3) Remove the partition board.
(ST1TØ4 x 10l 3 pcs.)

4) Remove the sound-insulation material.

5) Remove terminal cover of the compressor, and
disconnect lead wire of the compressor thermo.
and the compressor from the terminal.

6) Remove pipe connected to the compressor with
a burner.

7) Remove the fixing screw of the bottom plate
and heat exchanger. (ST1TØ4 x 10l 1 pc.)

8) Remove the fixing screw of the bottom plate
and valve clamping plate.
(ST1TØ4 x 10l 2 pcs.)

9) Pull upward the refrigeration cycle.

10) Remove nut fixing the compressor to the

bottom plate.

Fan motor

Propeller fan

Flange nut

Partition
board

Remarks

Valve
clamping
plate

Compressor
thermo.

Compressor



Reactor

1) Perform work of item 1 of , and .

2) Remove lead wires clung in holder on the
partition board.

3) Remove screws fixing the reactor.
(ST1TØ4 x 10l 2 pcs.)

– 77 –

Reactor

No.



Part name

Pulse
modulating
valve coil

Procedure

1. Detachment

1) Perform work of item 1 of , and , , .

2) Turn the coil clockwise (counterclockwise) by 90
degrees, and remove coil from the pulse modulat­ing valv e .

Remarks

2. Attachment

1) Set take-out part of the lead wire of coil to the coil
inserting position of the pulse modulating valve,
and attach the coil.

2) Turn the coil by 90 degrees, set surely the con­cave part at lower part of the coil to the position­ing hole of the pulse modulating valve, and then
fix the coil.



Fan guard 1. Detachment

1) Perform work of item 1 of , and .

2) Remove the front cabinet, and put it down so that
fan guard side directs downward.

Perform w ork on a corrugated cardboard,
cloth, etc. to prevent flaw to the product.

3) Remove the hooking claws by pushing minus
screwdriver according to the arrow mark in the
right figure, and remove the fan guard.

Take-out part
of lead wire

Notch

Coil inserting
position

Coil inserting
position

Coil fix
position

Positioning
hole

Minus screwdriver

Hooking claw

2. Attachment

1) Insert claw of the fan guard in the hole of the front
cabinet. Push the hooking claws (10 positions) by
hands and fix the claws.

All the attaching works have completed.
Check that all the hooking cla ws are fixed
to the specified positions.

– 78 –

No.

11

Part name

Replacement of
temperature
sensor for
servicing only

Common service
parts of sensor
TO , TS, TE, TD

Procedure

1) Cut the sensor 100 mm longer than old one.

2) Cut the protective tube after pulling out it
(200 mm).

3) Move the protective tube toward the thermal
sensor side and tear the tip of lead wire in
two then strip the covering part.

4) Pass the stripped part through the thermal
constringent tube.

5) Cut the old sensor 100 mm length on the
connector side, and recycle that connector.

6) Tear the lead wire in two on the connector
side and strip the covering part.

7) Twist the leads on the connector and sensor
sides, and solder them.

8) Move the thermal constringent tubes toward
the soldered parts and heat them with the
dryer and constring them.

9) Wind the attached color tape round the both
terminals of the protective tube when
colored protective tube is used.

10) Fix the sensor again.

NOTES :

1) Store the joint part of the sensor and the
connector in the electric parts box.

2) Never joint them near the thermal sensor
part. Otherwise it would cause insulation
inferiority because of dew drops.

3) When replacing the sensor using the
colored protective tube, wind the color tape
matching the color of that tube.

Remarks

Thermal
sensor part

200

Thermal
constringent tube

Cutting here

100

15

70

Winding the color tape

Connector

Soldered part

Dryer

Cutting here

100

Cutting here

15

70

These are parts
for servicing
sensors.

Please check
that the
accessories
shown in the
right table are
packed.

Parts name

1

Sensor

2

Sensor Spring (A)

3

Sensor Spring (B)

4

Thermal constringent tube

5

Color tape

6

Terminal

– 79 –

Q'ty

1
1
1
3
1
3

Remarks

Length : 3m
For spare
For spare
Including one spare
9 colors

MCC-813

– 80 –

12-1. Indoor Unit (1)

12. EXPLODED VIEWS AND PARTS LIST

202

201

239

225

226

206

235

221

224

220

216

227

207

222

215

208

233

228

219

223

229

210

230

213

211

218

212

217

214

204

205

Location

No.

201 43005516 Panel Ass’y, Front
202 43005548 Grille, Air Inlet
204 43080447 Filter, Air
205 43080446 Filter, Air
206 43063333 Panel, LED
207 43009630 Louver, Horizontal
208 43009579 Louver
210 43070140 Hose, Drain, Plastic
211 4302C029 Motor, Louver
212 4302C038 Motor, Fan
213 4306A024 Cord, Motor, Louver
214 43039363 Band, Motor, Left
215 43039321 Base, Bearing
216 43020315 Fan, Cross Frow
217 43039314 Band, Motor
218 4301V028 Holder, Pipe
219 43049698 Pipe, Shield
220 43039324 Guide, Drain

221 43020253 Bearing, Rubber

Part Description

241

234

231

Location

No.

222 43049728 Guide, Drain, Left
223 43079268 Cap, drain
224 43044741 Evaporator

225 43047332 Pipe, Suction, 9.5DIA
226 43047331 Pipe, Delivery, 6.4DIA
227 43019904 Holder, Sensor, SUS
228 43067108 Cover , T erminal
229 43062247 Cover, Read
230 43082275 Plate, Installation
231 4306S403 Remote Controller
233 43003280 Body, Ass’y Back
234 43083071 Holder, Remote, Comtroller
235 43080486 Electrical Air Purifying Filter
236 4306S404 Generator, HV
237 43080473 Unit, Frame, Main
238 43080461 Unit, Ass’y, EP
239 43001608 Plate, Displa y
241 4308N506 Owner’s Man ual

Part Description

– 81 –

Indoor Unit (2)

403

404

401

402

413, 414

405

406

407

237

Location

No.

401 4306A080 Terminal Block, 2P,

402 43062189 Cover, E-Parts
403 43050382 Sensor, TC (F6)
404 43050400 Sensor, T A
405 4306A091 Housing, PU1, 4P
406 43051343 SW-Micro Ass’y

Part Description

AC300V, 20A

408

238

236

Location

No.

407 4306A092 Housing, LED, 9P
408 4306S405 P.C. board Ass’y, WRS-LED ,

413 4306S384 P.C. board Ass’y, MCC-891

414 4306S385 P.C. board Ass’y, MCC-891

Part Description

MCC-900

(10JKCVP)

(13JKCVP)

– 82 –

12-2. Outdoor Unit

35

Revised:5/July/2004

2

17,18

11,13

12,14

19

28

20

21

23

9

22

1

8

7

3

4

Location

No.

1 43005368 Cabinet, Back, Ass’y
2 43005369 Cabinet, Upper, Ass’y
3 43005370 Cabinet, Front, Ass’y
4 4301V011 Guard, Fan
5 43042461 Base, Ass’y
6 4301V012 Cover, Valve, Packed
7 43062230 Cover, Wiring, Ass’y
8 43019903 Hanger
9 43041612 Compressor, DA91A1F-45F
11 43046392 Valve, Packed, 6.35
12 43046391 Valve, Packed, 9.52
13 43147196 Bonnet, 1/4 IN, 6.4CU
14 43047401 Bonnet, 3/8 IN, 9.52CU
15 43047491 Tube, Capillary, I.D 1.5

Part Description

5

4
22
23

5

24,25

6

2

29

Location

No.

17 43046422 V alve, Pulse, Modulating
18 36746552 Coil, PMV
19 43055521 Reactor, CH-57
20 43050298 Thermostat, Bimetal,

21 4302C033 Motor, Fan, ICF-140-43-1
22 43047667 Nut, Flange
23 43020322 Fan, Propeller
24 43097204 Nut
25 43049643 Cushion, Rubber
26 43063320 Holder, Sensor, 6-8, 9.52
27 43063321 Holder, Sensor, 4-8, 9.52
28 43063195 Holder, Thermostat, Bimetal
29 43063322 Holder, Sensor

Part Description

CS-7 125

15

1

27

26

– 83 –

3543043656CONDENSERASSY

12-3. P.C. Board Layout

705

707

704

702

TS SENSOR (Ø6)
TO SENSOR (Ø6)

TD SENSOR (Ø4)

701

703

Location

No.

701 43050334 Sensor, TD (F4)
702 43050382 Sensor, TC (F6)
703 43160469 T erminal Block, 6P,

Part Description

AC250V, 20A

– 84 –

Location

No.

704 43062228 Base, P.C. board, ABS
705 43063324 Heatsink, Aluminum
707 4306S381 P.C. board Ass’y, MCC813

Part Description